Loading...
HomeMy WebLinkAboutCR 08-15 (PIij c _ Report to• Executive Committee PICKERING Report Number: CR 08-15 Date: June 8, 2015 From: Marisa Carpino Director, Culture & Recreation Subject: Tender for Desiccant Dehumidification at Don Beer Arena - Tender No. T-9-2015 • - File: A-1440 Recommendation: 1. That Report CR 08-15 of the Director, Culture & Recreation regarding the Desiccant Dehumidification at Don Beer Arena be `received; 2. That Tender No. T-9-2015 submitted by Climate Control Engineers and Contractors in the amount of$280,183.50 (HST included) be accepted; 3. That the total gross project cost of$362,945.00 (HST included), including the amount of the tender and 'other associated costs, and the total net project cost of $326,843.00 (net of HST rebate), be approved; 4. That Council authorize the Division Head, Finance & Treasurer to finance the project, as provided for in the 2015 Don Beer Arena Capital Budget, in the amount of$326,843.00 from the Federal Gas Tax Reserve Fund; and 5. That the appropriate City of Pickering officials be authorized to take the necessary action to give effect hereto. Executive Summary: The existing mechanical units that provide dehumidification for Don Beer Arena have reached the end of their economic life cycle. For many years, the existing wall mounted units have failed to meet the operational demands of the arena resulting in high humidity conditions that have contributed to the deterioration of the building interior and envelope Staff have determined that the most cost-efficient solution is to install a roof mounted desiccant dehumidification system that will economically and effectively dehumidify pads 1 and 2 at Don Beer Arena. Installing an energy efficient roof mounted desiccant dehumidification system will result in less annual building maintenance costs, improved indoor air quality, reduced dasherboard fogging and the ability to program summer ice on a single ice pad. To that end, Tender No. T-9-2015 was prepared and advertised on the City's website. 142 . Report CR 08-15 June 8, 2015 Subject: Tender for Desiccant Dehumidification at Don Beer Arena Page 2 The low bid submitted by Climate Control Engineers and Contractors in the amount of $280,183.50 (HST included) is recommended for approval. The total gross project cost is estimated to be $362,945.00 and the total net project cost is estimated at $326,843.00 (net of HST rebate). Financial Implications: • 1. Tender Amount Tender No. T-9-2015 $247,950.00 HST (13%) $ 32,233.50 Total Gross Tender Cost $280,183.50 2. Estimated Project Costing Summary Tender No. T-9-2015 $247,950.00 Miscellaneous Costs $ 2,000.00 Integration of Controls $ 20,000.00 Consulting Costs $ 26,240.00 Inspection & Testing $ 5,000.00 Contingency $ 20,000.00 Total Cost $321,190.00 HST (13%) $ 41,755.00 Total Gross Project Costs $362,945.00 HST Rebate (11.24%) ( 36,102.00) Total Net Project Costs • $326,843.00 3. Approved Source of Funds Don Beer Arena Approved Code Source of Funds Budget Required 5715.1503.6178 Federal Gas Tax $330,000.00 $326,843.00 Total Funds $330,000.00 $326,843.00 Project Cost under (over) approved funds by $3,157.00 143 Report CR 08-15 June 8, 2015 Subject: Tender for Desiccant Dehumidification at Don Beer Arena Page 3 Discussion: Arenas built more than 20 years ago were primarily designed for seasonal operations (six to seven month ice season). Today, most arenas in urban areas either operate their refrigeration plants year round or for an extended season to maximize revenue and meet the demands of user groups. Operating in the hot humid summer weather, including the spring and fall "shoulder" months, increases the moisture load on the dehumidification systems in arenas. As such, dehumidification systems originally designed for seasonal operation are often not suitable for use during these periods. With increased humidity in an arena, water vapour in the air condenses on cold surfaces such as building walls, structure and the ice surface itself. The hazards of condensation on the building structure include rot, mold and corrosion. Condensation on the ice surface must be frozen by the refrigeration plant and impacts the quality of the ice surface. For these reasons, a dehumidification system designed to maintain proper humidity levels in summer weather is required to ensure ice quality and protect the building from moisture damage. Don Beer Arena operates with small interior dehumidification units mounted on a platform in two corners of each rink. These units simply cannot provide sufficient dehumidification to maintain optimal humidity levels during the spring and fall seasons and will not permit summer ice use within the facility. TS Engineering Inc. were retained by the City of Pickering to complete a study and make recommendations for the most cost effective and energy efficient dehumidification system at Don Beer Arena. TS Engineering Inc. issued their pre-design report entitled Don Beer Arena Dehumidification Upgrade Pre-Design Report dated October 10, 2014. In that report, TS Engineering Inc. recommended the addition of one roof mounted desiccant dehumidifier sized to move 15,000 CFM of processed air and capable of moisture removal rates to meet the calculated load for pads 1 and 2. Ice pads 1 and 2 are the older of the three rinks at Don Beer and are showing the most deterioration due to high humidity. The configuration of ice pads 1 and 2 allow for a single desiccant system to be located centrally and provide dehumidification to both ice pads. Ice pad 3 is the newest ice surface at Don Beer Arena and the desiccant unit in that location performs substantially better than pads 1 and 2. As such, a replacement unit is not required in ice pad 3. The added benefit of adding desiccant dehumidification is that Culture & Recreation Department staff can now program and offer summer ice rentals at Don Beer Arena. Stakeholders and user groups were consulted and confirmed a high level of interest in booking summer ice for their groups. To enable summer ice, the refrigerated ice pad needs to have existing embedded heating loops under the refrigerated slab to prevent frost being driven into the sub-soil, causing frost heave and damaging the slab. This is unnecessary when using a slab for seasonal ice only as the summer removal of ice allows the underslab frost to dissipate each year. Only ice pad 1 at Don Beer Arena has the necessary underslab heating and therefore is the only pad that can be used for 144 summer ice rental. . Report CR 08-15 June 8, 2015 Subject: Tender for Desiccant Dehumidification at Don Beer Arena Page 4 Bids have been received to the tendering call, which closed on Wednesday, May 13, 2015 for the supply and installation of a Desiccant Dehumidification System at Don Beer Arena. A mandatory site visit was held on Thursday, April 30, 2015 and 4 bidders attended, of which 3 bidders submitted a tender for this project. The low bidder, Climate Control Engineers and Contractors, has submitted a copy of the Health & Safety Policy, the current WSIB Workplace Injury Summary Report and • Clearance Certificate, confirmation of Ministry of Labour Health and Safety Awareness Training for every worker and supervisor on this project, proof of compliance with amended Confined Space Entry Regulations (September 30, 2006), along with copies of certification and all are acceptable to the Coordinator, Health & Safety. Certificate of Insurance is deemed acceptable to Manager, Budgets & Internal Audit. Waste Management Plan and list of subcontractors has been approved by the Manager, Facility Operations. The project engineers - TS Engineering Inc. have reviewed the tender submitted by Climate Control Engineers and Contractors Ltd. and has deemed it acceptable. In conjunction with the foregoing approvals, staff have reviewed the previous work experience of Climate Control Engineers and Contractors Ltd, the references provided and the bonding available on this project and the bid is deemed acceptable. Upon careful examination of all tenders and relevant documents received, the Culture & Recreation Department recommends the acceptance of the low bid submitted by Climate Control Engineers and Contractors for Tender No. T-9-2015 in the amount of $280,183.50 (HST included) and that the total net project cost of$326,843.00 be approved. Attachments: 1. Supply & Services Memorandum dated May 14, 2015. 2. Don Beer Arena Dehumidification Upgrade Pre-Design Report by TS Engineering Inc. dated October 10, 2014 145 Report CR 08-15 June 8, 2015 • Subject: Tender for Desiccant Dehumidification at Don Beer Arena Page 5 Prepared By: Approved/Endorsed By: iv mu Mike Spatafora Marisa Carpino Supervisor, Facilities Operations Director, Culture & Recreation 090,19 Brian J. Duffield Stan Karwowski Man ger, Facilities Operations Division Head, Finance & Treasurer. j Vera A. Fe gemacher C.P.P., CPPO, CPPB, C.P.M., CMM III Manager, Supply & Services MM:mc • Recommended for the consideration of Pickering City Council 1 1/0. 2.0 Tony Prevedel, P.Eng. Chief Administrative Officer 146 • • i-I CH LENT n_ I -T O REPORT — S A • PICK ERIN _ j e m O CULTURt aa��-��¢RLATeOt� s tIE�IO RECEIVED f\/ I (G (5 ( FILE NO. . To: Marisa Carpino : �_ _ _._ ... _ May 14, 2015 Director, Culture and Recreation I !FWD - '"=: b`:` J`-A' OR From Vera A. Felgemacher • &r•EC __ r° 'I • Manager, Supply & Services _�_ _ >!�E,0I :1r.Es• • t Cf • C CPEA. k - 7U ' DICE SUSTAIN • Copy: • Manager, Facilities Operations :. . • DEV . Subject: Tender No: T-9-2015 • • Tender for Desiccant Dehumidification System at the Don Beer Arena • File: F-5400-001 • Tenders have been received for the above project. An advertisement was placed on the City's website inviting companies to download the tendering documents for the above mentioned tender. Three tenders were received. • A copy of the,Record of Tenders Opened and Checked used at the public tender opening is attached. Tenders shall be irrevocable for 60 days after the official closing date and time. Purchasing Procedure No. PUR 010-001, Item. 1103 (r) provides checking tendered unit prices and extensions unit prices shall govern and extensions will be corrected accordingly, which has been done. A Copy of the tenders are attached for your review. • • Summary • • • • Harmonized Sales Tax•lncluded Bidder`. Total Tendered Amount After..Calculation Check Climate Control Engineers and Contractors - $280,183.50 • $280,183.50 • Mapleridge Mechanical Contracting Ltd. $328,830.00 • $328,830.00 Prairie Plumbing Ltd. . . $344,650.00 $344,650.00 • Pursuant to Information to Bidders Item 28 and Tendering Specifications Item 18, the following documentation will be requested of the low bidder for your review during the evaluation stage of this tender call. Please advise if we are to proceed with this task. - (a) A copy of the Health and Safety Policy to be used on this project; (b) A copy of the current Workplace Injury Summary Report issued by Workplace • Safety & Insurance Board (in lieu of the Workplace Injury. Summary Report document, a copy of the current CAD 7, NEER, or MAP reports may be submitted); 147 2 -; p,-11-L...c,...R_ (39 ,.11A.Crii I t N 1 77 _, . - .. Ci hi 01..m.1 --....„..... , .- ';._-_-_-7-7-7....t--- --7•1, ''';-.:71'1117417.!!":"14111111411121°6- A ;.z.::.,.. -----_.ux—i------mia....-:: ,---, ii---i-E---.,1 ''• '- --../.•■ tiro pri 1111c __. __ ,,,,:g1-.7. -,,,•--'.: -- ' ,: .,-,,,, _ - - ,:----...L-17.1-,„4:r---3.Z. .2`.1S-C: , ---',' .7, -,,--','•Ivi"-aik,--'.---=t:;'"?':t,,, ''-c-4-v.1" :-'!'"'-f--4,1i:-.1.--c'-`4,4 st a..._,..,,,,-. ,--, - -, - ::,-,A7. ,,z-,-- -±„.4,- ,- -,L, 'S.-..',,Y:,,f-1,,, - ''',7-%'•=''',:''4,7. ,- 4.,-` ' -,. -'----5.- T -,e,-*, - -, ,,*:.. C, ".*47",'-*''': •- , T...- .,,-0.t:?-1,-- ,, ._ - ;.-- ,-...„--4:-.„ 1,_F_'.i.': ,,,...-,- ---; -'s•-, ---'... .- -_-;.;.,,..---:.,--:.= ,---r-7-'7' ,^::,.3-,: 43-7-; 4,,,-A' -i-,-q.,-,.-- - - ,;II,111 ' ' - i; - '-i-IL.‘.--...'-• -_,_i'..2 , - 111P1. 1180priagAt---si, ...,-,I,.,-. - 4:-;!---"-'.:4!-'-.:-' '-..' ' ------------ illd „, .... ..-",-'-'-'-:- --- -- ll!il _ .. „._,7*.'q .;t.-' ,1' .7-- ;!1:1 --,-,.,..,,fl:---k, ,..„,.:9 .. ..7-4-„.. -- .,--- -_-*--;..--jt ----'44- ---' --- --7,-;`,7,-1-:'-'?"`"-n'f.r.-TP*-i-'="-- ---=`;" -, *-1A-7 49--;=4-ilt:'-. ..'--7**-',.'="" ::.if !'-d-,' -- - _.---",- ,''''.-- :'775,".,"*V, ', •*:,,v---_*-- -----:-...L.,--- 1 --..',...**".;."'.1..f;'*- '.-;:- ",-=-..."5-,....7c-;',:-.'1...,;_'_-..i;;-.4,-.-=-z"-i2- .7 -• : '7.,,--.7,. -._-,=------,----- ';',5',14.-'---2:---',-.;'--7- _.-ti22 ''''''' '''' ::,--'::---in.J`'.:fr.;:t.''''- '7:,.._: :-';', 77.-t-,,r,11'71-1:41°_?,ie;t:-'-s-ie::'-,!.:-,.,"i-r '.7,.•:7-:4.-'44-i-'-'`-.- ----'2'.' „ -,-----4i%'& , ''r--"---''- ,,y_',4-„i:'-_,-t.,,,r:--r_t..-2'_„A-,;,f... ,i,- ,-,„;•,-4,-,,,,,,-.;.:,15...,;t _-,:4_,..-;.--:-..,-, -.„,4-..1:--;I:,i--„;,2-1',:t4-74-7:&„-2,;:;;--,-*...----,,..-_.;::„--:tr,..:7„.;.5-._.;::;..,0,0..„...7.'- ,,,,,- 7-1,::- _:- ti-*2".;..-="4_77,i.:,..q'::-,--i_-,,1.--'.e_z::*---&'.,_„ - ...-- ' . ' r. ' '‘... --:t4.-'- '' -”'■'''f'---E''4':;:'I : 7,:72.3"''-■e.' '4'''-- ;2. ■,....-.17-... ::.V...''`-1-,"'; ,,,,,, 4,„,;,:...:,,,-,4,:- „.„%,.., _ ,,k.,,,, ., _..t,- -..,,,.. -- - „- ., - _.„,_-,..-- ,-,„- --..21.-;_,,i..,-,,...,,,,,,,,-„!_..,,:,,,,,,--„,?..9.-„, -,..k! ,,,,,...,_:--_-°' -4.11,r.., '.;.,St....,..;!-•,,fr;;;;,,t-_-_-;:,-•-,.--- ` - . - -- 'ST,. ,T, =--'-- ,:.'.-4■••'''',Z1;;,.T.:',...61-1-,. - "' ' D AOTNI OBNE G PRE DESI N REPORT EuRPAGRRAENDA DEHUM E IDIFIC MISPI% Z GI 1 5 148 City of Pickering Dehumidification Upgrade Don Beer Arena Pre Design Report Table of Contents 1.0 Introduction 2 2.0 Existing Conditions 2 3.0 Dehumidification and Ventilation Requirements 5 4.0 Analysis of Existing Systems 6 4.1. Dehumidification 6 4.2. Ventilation Systems 7 5.0 Design Solutions and Construction Budgets 8 5.1. Rink#s 1&2 Design Solution Design Summary 8 5.2. Rink#5 1&2 Desiccant Dehumidification Construction Budget 9 5.3. Rink#3 Design Solution Design Summary 9 5.4. Rink#3 Desiccant Dehumidification Construction Budget 10 5.5. Summary 10 APPENDICES Appendix A-Don Beer Arena Dehumidification Upgrade Conceptual Layouts Appendix B-Don Beer Arena Dehumidification Upgrade Proposed Equipment Details Appendix C-Don Beer Arena Dehumidification Structural Conceptual Drawings TS ENGINEERING INC.,8 PLAXTON CRESENT,TORONTO,ON,M413 ILt Page 1 149 City of Pickering Dehumidification Upgrade Don Beer Arena Pre Design Report 1.0 . Introduction This report is intended to assess the dehumidification equipment at the Don Beer Arena in Pickering and suggest potential replacement equipment. Though not part of the proposed upgrade, ventilation systems in the rink bowls will also be reviewed because their function has a major impact on the dehumidification requirements. The facility was constructed in three phases with Rink#1 in 1969,Rink#2 in 1973 and Rink#3 in 2001. One of the three rinks is capable of year round ice and it is typical for the seasonal ice making process to take place in August of each year: Even twenty years ago, many ice arenas operated for only six or seven months per year. Today, most arenas in urban areas either operate their refrigeration plants year round or for an extended season. Operating in the hot humid summer weather increases the moisture load on the dehumidification systems in arenas and dehumidification systems originally designed for seasonal operation, i.e. November through March, are most often not suitable for use during the summer. With increased humidity in an arena,water vapour in the air condenses on cold surfaces such as building walls, structure and the ice surface itself. The hazards of condensation on the building structure include rot, mold and corrosion. Condensation on the ice surface must be frozen by the refrigeration plant and impacts the quality of the ice surface. Therefore, a Y g P dehumidification system designed to maintain proper humidity levels in summer weather is required to ensure ice quality and protect the building from moisture damage. 2.0 Existing Conditions Based on discussions with City Staff, a review of existing drawings and on site investigation, the following is a summary of existing conditions affecting dehumidification: — The occupancy counts for the three rinks are as follows: • Rink#1: 200 people • Rink#2: 30o people • Rink#3: loo people — The floor areas(ice/non-ice)of each rink bowl areas follows: • Rink#1: 1585o ft2/618o ft2 • Rink#2: 15455 ft2/616o ft2 • Rink#3: 15940 ft2/5335 ft2 — Each rink is fitted with twin packaged refrigerant based dehumidifiers mounted in the rink corners above the ice surface. The units are Humicons as manufactured by Cimco Refrigeration. TS ENGINEERING INC.,8 PLAXTON CRESENT,TORONTO,ON,M4B iLl Page 2 150 City of Pickering Dehumidification Upgrade Don Beer Arena Pre Design Report • — The packaged units were struggling during one site visit, shortly after the ice making process. Considerable condensation on cold surfaces inside the rink bowl was noted. • • .•.- 2 _ n4 Figure 1:Typical Existing Packaged Dehumidifier(Rink 3 Shown) — The North dehumidifiers in Rink#51 and 2 are each fed from a zoA breaker in the 575V distribution panel located in the common Refrigeration Room. — The South dehumidifiers in Rink#s i and 2 are both fed from a 575V distribution panel located on the mezzanine in the southwest corner of Rink#1. The circuit breakers for the units are 15A and 20A for Rinks 1&z respectively. — The Rink#3 dehumidifiers are each fed from a 20 A breaker in a 575 distribution panel located in the Rink#3 electrical room. — For indoor air quality control, each rink is equipped with a noxious gas detection system that is presumably interlocked with ventilation equipment. — Each rink bowl is equipped with an exhaust fan and a fresh air damper, both installed in the respective rink outdoor walls. — In addition to the main ventilation equipment, additional exhaust fans are situated above the spectator areas. These are presumably installed to provide demand ventilation when the gas fired infra red heaters above the spectator areas are in operation. TS ENGINEERING INC.,8 PLAXTON CRESENT,TORONTO,ON,M4B Page 3 151 City of Pickering Dehumidification Upgrade Don Beer Arena Pre Design Report • f#y i f1 ? 2,71.14111 -i 4. • 1;» A T F lr 3- 4 r a r .i .Er s • b ' H �._. 1,-Yi 41 3 SDK. Figure z-Typical Existing Exhaust Fan(Rink t Shown) — There is evidence of ongoing moisture issues in the rink bowls including paint damage and surface rust on structural steel components. — At several locations, cracks in the building envelope were evident which contribute to moisture infiltration. Most doors,pipes and mechanical equipment appeared to require some degree of additional sealing. Figure 3-Typical Existing Fresh Air Intake(Rink 1 Shown) TS ENGINEERING INC.,8 PLAXTON CRESENT,TORONTO,ON,M45 IL/ Page 4 152 • City of Pickering Dehumidification Upgrade Don Beer Arena Pre Design Report 3.0 Dehumidification and Ventilation Requirements The dehumidification requirements and associated equipment selections shall be based on the following design criteria: Summer ASHRAE Weather Data—Pickering,ON: 86°F Dry Bulb 76°F Wet Bulb Winter ASHRAE Weather Data—Pickering,ON:4°F Dry Bulb Arena Indoor Design Condition: 60°F,45%R.H. Based on established design standards for arena dehumidification and ventilation, the requirements of the Don Beer Arena have been calculated and the results are summarized in Table 1. The calculated moisture loads above below allow for 10% of the ventilation as required by current ASH RAE Codes for Indoor Air Quality. Due to the high cost of treating outdoor air, demand ventilation is common practice in arenas. Demand ventilation means that under normal operating conditions,a minimal amount of fresh air is brought in the building. Full ventilation mode is initiated manually by the operators or by a noxious gas sensor fault. Most often, the dehumidifying capacity of arena systems are sized to handle only internal moisture loads. Some arena dehumidification systems are sized to handle internal moisture loads plus the demand ventilation rate (usually 10%-2o% of the full ventilation rate). To size the unit for full ventilation mode, which rarely occurs, would mean a much larger desiccant wheel, gas service and electrical service. The rarity of this condition is the reason most facilities elect to size the system for demand ventilation or no ventilation. Arenas that install dehumidification systems in this manner, do so with the understanding that temporary spikes in humidity in the building will occur, depending on outdoor conditions and ventilation rates. For the purposes of preliminary equipment selections and construction budgets, 10%ventilation shall be assumed, i.e. 10% of the values presented in Table 1. Rink# Occupants Rink Floor Area Non Rink Floor Ventilation ft2 Area-ft2 Required-CFM 1 200 15850 6180 6626 2 300 15455 6160 7256 3 100 15940 5335. 5852 Table t:Summary of Rink Bowl Ventilation Requirements TS ENGINEERING INC,8 PLAXTON CRESENT,TORONTO,ON,M4B iLi Page 5 153 City of Pickering Dehumidification Upgrade Don Beer Arena Pre Design Report The total moisture load for each rink is made up of internal loads and the ventilation load. A summary of moisture loads for the three Don Beer arena rink bowls are presented below in Table 2. Rink# Infiltration Permeation Occupants Ventilation Safety Total lb/hr lb/hr lb/hr lb/hr ' (10%) lb/hr 1 7.6 6.4 65.6 34.1 11.4 125.0 2 4.6 5.o 80.6 37.3 12.8 140.3 • 3 4.8 6.4 . 50.6 30.1 9.2 101.1 Table i:Summary of Calculated Moisture Loads 4.0 Analysis of Existing Systems 4.1. Dehumidification The existing Humicon mechanical dehumidifiers utilize a refrigerant cooling coil to remove moisture from the building. When the arenas were constructed, units of this type were the standard in the industry. However,over the past fifteen years,desiccants have become the preferred method of dehumidifying arenas. Each existing Humicon unit is capable of approximately 15 lb/hr of moisture removal which means each rink has 3o lb/hr of moisture removal capacity. Referring back to our calculated moisture loads,clearly these units do not possess the capacity to handle the moisture loads in the three rinks. Even in the absence of ventilation, the Humicons cannot handle the internal moisture loads. The key to arena dehumidification is to ensure that the dew point of the air is lower than the temperature of any building surface it contacts. For arenas, a dew point of 32°F—35°F is ideal. Since moisture is constantly added to the space, the dehumidifier is most effective if it provides air at a dewpoint below the target design of 35°F. Desiccants maintain 35°F dewpoint in the space by providing air at a dewpoint between 10F and 20°F. Mechanical dehumidifiers,like the existing Humicon units,supply air at or near the target dewpoint 35°F. For this reason, mechanical dehumidifiers are less effective and much slower to respond than desiccants which have become the industry standard. Desiccants capture moisture due to a difference in vapour pressure. A cool, dry desiccant wheel has a very low surface vapour pressure in comparison with humid air. The surface vapour pressure rises as more moisture is captured until the surface of the wheel is saturated. The wheel is then heated, which reverses the vapour pressure differential, TS ENGINEERING INC.,8 PLAXTON CRESENT,TORONTO,ON,M45 iLi Page 6 154 City of Pickering Dehumidification Upgrade Don Beer Arena Pre Design Report forcing the moisture out of the wheel. This moisture is rejected to the outdoors by the desiccant unit. �.2' "'.' r 8 r p ' $ .V ii i f 7 '' il »;` P s 'r r i?- i s Yw � 7- x 'Wes" t r + M lttp.- E 1 # i 1 r � - 4R If'�� _• i rII Figure 4:Typical rooftop desiccant installation The switch from mechanical dehumidification to a desiccant increases the rate of moisture removal in the facility. Since more work is being done, it follows that more energy is required. The mechanical dehumidifiers require electricity for both moisture removal and air movement while desiccants use natural gas for moisture removal and electricity for air movement. Therefore, once a retrofit to a desiccant is complete, owners should expect a drop in electricity consumption,but an increase in natural gas costs which when combined, will result in an increase in the dehumidifier operating costs. However, a desiccant also creates additional electrical savings by lowering the load on the refrigeration system. It is important to note that the impact on the refrigeration system can be negated if the plant is not setup and operated in an efficient manner. 4.2. Ventilation Systems The capacity of the existing ventilation systems is estimated at approximately 1o,000 CFM per rink which exceeds the ASHRAE.62 requirements. It is presumed that the network of noxious gas sensors initiate ventilation when required. The exhaust fans operate at a single speed so when they are in operation, the moisture load from fresh air will be excessive. Therefore,under normal operation,there is no fresh air introduced to the rink bowls. In order to improve indoor air quality,rooftop desiccants can be utilized to mix fresh air with return air before passing over the desiccant wheel. The advantage of this practice is that the TS ENGINEERING INC.,8 PLAXTON CRESENT,TORONTO,ON,M4B iLl Page 7 155 City of Pickering Dehumidification Upgrade Don Beer Arena Pre Design Report moisture from fresh air is removed prior to entering the building. However,the addition of fresh dampers air does increase the size, weight and cost of the desiccant unit. Alternatively,the City could consider installing variable air volume systems when the existing ventilation equipment is replaced in the future. 5.0 Design Solutions and Construction Budgets With a construction budget of$250,0oo in mind,it is recommended that the Don Beer Arena be served by two desiccant units, one to serve Rinks#1 and#2 and a smaller unit dedicated to Rink#3. The proposed dehumidifiers would be mounted on the existing roof with sheet metal ductwork distributing the air to and from the units. The new desiccant units will have capability to treat up to 10%of the required ventilation air. 5.1. Rink#s 1 & 2 Design Solution Design Summary • One (1) roof mounted desiccant dehumidifier sized to move 15,000 CFM of process air and capable of the moisture removal rates shown in Table 2. The moisture load associated with full emergency ventilation is not within these units' capacity. Thus the unit is intended to operate with the following features: • All air to the new dehumidifier shall be recirculated air from the Rink 1 and 2 arena bowls. • Ventilation air shall be provided by the existing equipment. Therefore, fresh air, when introduced to the building, is untreated. Depending on outdoor conditions,operation of the ventilation equipment could result in a temporary rise in building humidity, i.e. Dehumidifier units are not sized to handle full ventilation air. • Common ductwork system shall include motorized dampers. Should only one rink require dehumidification,the motorized dampers shall isolate the satisfied rink. • Sound attenuation on dehumidifier discharge ductwork to prevent transmission of noise into rink bowls • A new breaker in the Refrigeration Room 575V distribution panel and power wiring to the rooftop desiccant. • A humidistat in each rink bowl'shall cycle the unit and control the aforementioned ductwork motorized dampers. • Remote panel shall be installed in the Rink 1 and 2 Zamboni Room for ease of access to the basic control features. • The desiccant unit shall be installed on the existing rink bowl steel structure which will be reinforced as required to support the added load. • Tie in to existing natural gas piping on roof directly adjacent to new dehumidifier. • Inspect building joints and openings for cracks and seal as required. Refer to Appendices for conceptual drawings and equipment details of the proposed design solution for Rinks 1 &2. TS ENGINEERING INC.,8 PLAXTON CRESENT,TORONTO,ON,M4B iLl Page 8 156 City of Pickering Dehumidification Upgrade Don Beer Arena Pre Design Report 5.2. Rink#s 1 & 2 Desiccant Dehumidification Construction Budget DEMOLITION OF EXISTING DEHUMIDIFIERS $4000 NEW DESICCANT UNIT $90,000 HOISTING,DUCTWORK AND GAS PIPING $38,000 POWER AND CONTROL WIRING $14,000 STRUCTURAL AND ROOF OPENINGS $24,000 COMMISSIONING $3,000 SUB TOTAL: $173,000 CONTINGENCY @a 10% $17,300 BUDGET TOTAL(not including HST). $190,600 5.3. Rink #3 Design Solution Design Summary One (1) roof mounted desiccant dehumidifier sized to move 7500 CFM of process air and capable of the moisture removal rates shown in Table 2. Moisture load associated with full emergency ventilation is not within these units' capacity. Thus the unit is intended to operate with the following features: • All air to the new dehumidifier shall be recirculated air from the Rink#3 arena bowl. • Ventilation air shall be provided by the existing equipment. Therefore, fresh air, when introduced to the building,is untreated. Depending on outdoor conditions,operation of the ventilation equipment could result in a temporary rise in building humidity, i.e. Dehumidifier units are not sized to handle full ventilation air. • Sheet metal ductwork for supply and return air from the unit. • Sound attenuation on dehumidifier discharge ductwork to prevent transmission of noise into rink bowl. • A new breaker in the Rink#3 Electrical Room 575V distribution panel and power wiring to the rooftop desiccant. • A humidistat in the Rink#3 rink bowl shall cycle the unit. • Remote panel shall be installed in the Rink#3 Zamboni Room for ease of access to the basic control features. • The desiccant unit shall be installed above the existing concrete hollow core slab. The load of the new dehumidifier will be supported by new columns such that no additional load will be sustained by the hollow core slabs. • Tie in to existing natural gas piping in the North East corner of the rink bowl and run new supply new line out to desiccant on roof. • Inspect building joints and openings for cracks and seal as required. Refer Appendices for conceptual drawings and equipment details of the proposed design solution for Rink 3. • T5 ENGINEERING INC,8 PLAXTON CRESENT,TORONTO,ON,M4B Page 9 157 City of Pickering Dehumidification Upgrade Don Beer Arena Pre Design Report 5.4. Rink#3 Desiccant Dehumidification Construction Budget DEMOLITION OF EXISTING DEHUMIDIFIERS $2200 NEW DESICCANT UNIT $63,000 HOISTING, DUCTWORK AND GAS PIPING $21,200 POWER AND CONTROL WIRING $7,000 STRUCTURAL AND ROOF OPENINGS $29,000 COMMISSIONING $3,000 SUB TOTAL: $ 25,400 CONTINGENCY @10% $12,540 BUDGET TOTAL(not including HST). $137,940 5.5. Summary The existing dehumidification equipment at the Don Beer Arena is not suitable for an extended season or year round use. Excessive condensation inside the rink bowls was witnessed during the seasonal ice making process and through an inspection of the facility,it is clear this is an ongoing issue. Calculation of the moisture loads in the facility along with comparison with the capacity of the existing equipment verifies this point. Given the moisture removal requirements, facility layout and project funding, replacement of the existing equipment with two gas fired desiccants is a proven solution to the existing humidity issues. The recommended moisture removal rates and corresponding desiccant units allow for 10% of the ventilation rate required by Code. Typically, the ventilation systems operate only to maintain indoor air quality when required. In the event of a high noxious gas condition,the existing ventilation systems would introduce more outdoor air into the building than the new desiccants can handle. Depending on outdoor conditions, this could result in a temporary spike in humidity until such time as the gas fault clears, the ventilation cycles off and the desiccants can remove the additional moisture. This strategy is driven by the excessive capital and operating costs of treating outdoor air in high volumes during hot humid weather. The sum of the Construction Budgets above are in excess of the funds available for the project. Note that design solution features two separate dehumidifiers which can be installed under separate capital projects if necessary but we would expect combining the ,projects would offer a savings over the pricing used for the Construction Budgets. With the unknown impact of competitive bidding, we suggest the City consider tendering both dehumidifiers with itemized pricing for each dehumidifier. END OF REPORT TS ENGINEERING INC.,8 PLAXTON CRESENT,TORONTO,ON,M4B Page 10 158 ,...p.._ Appendix A Dehumidification Upgrade Conceptual Layouts City of Pickering Don Beer Arena Dehumidification Upgrade Feasibility Study 159 • e Q © O © O O ? O OM O 0 0 0 . - - I _ '—'1 I - i ---- _ 1 �I - - - - - - — — — - - — i l 1 I , 1 I l I 1 I I i .I i i ` Ii 9! t II! - ma Mi 1.1 I I I I I I I I I I I II I I •1 I I I PO I I -I - - ' —a A 1 - - - - - - - - -ate- - - - �I I A 1- 1- - 1 - - 1 - ! 1 _I__ ! — — —— -I 1 I I I I U I�,' t a • •. -1 \_,,, ! h-J 1 L___. 1 ,. ,._,. _ _ _ • .1 --- —11.1 _. III It-IBM IIIM ° my obi - r �_'�r/1 �,_ , 1 �, - - - - - --��� _ _ f. S �I I. -S,. yp a iI li I=x 1 5 Il 1 I I I I \ 1 1 f' ill a I §. 4 I P 1 1 I 1 1 o - p - � 11- - - - - - - -I I - L, 1 I I 1 I I pZ I I 0 - - I-- - - I f f n,— — - - f - - J i— O - I I I ! . , F____ - - i ,I I _ 1 I _ I I _ t N.__ - _ . Ali _,oll�� =-� -_ I • o �,, yi — - - - M II° _III immi ' , I I L ' A II • \ ir �l;__' V 1 � I I I I I I O 1- :� 1- - I - - 1 - 1 - - - 1 - - - la: .—0,2„ 11�li1±i��., I - - - - - - -I - O —=—` —r. - - - - - - - - I I 1 • / Rim l I 1 1 1 1 1.1 flFl ,, _ - - - - - • - - - - - - - �f °' - - _ - - _ - ; ,•_ -o © 0 0 0 0 0 "-Al. -1o, e �Fe zo-�^ 3 Ao Zb�� .� r PA-. u rA � • x� goof PM o Z g 1, s' 'JI71Ci�1�k3 Ad o a 160 ' ° N 0 8 e 8 O O I o 0 o 0 o O o 0 9 ,,oo i I � 1 � . p_9— —�— I— — I — — I — I — — \ _ ._ _ �ii 2 i 1 it 1 MI i i �__o{.72 11—.111 � - -- o o ice, 0 li Fes=III II �7� uk amI �� . " 0111 ,1 N 11 I l 1 1 ,, . z I gl 1 0 - - � 3 _ _ �_ _ _ I _ _F � _ _N i .� p . o - - I-- - - - - - - - i - r-- - - I - - r __ _ 1 gyp ` tomom o 1611 IOW, __,_ AM - 0 rill '2 I r //z - P - - ---1 - - --' - - ----t Mil 1 l - f Z ,r= :"uiu i- 1111 Z 0 Till Hifi 1 " as i i i i i � I • © B i IP le\ id Pi 1 i i 1 1. ri 11 i 11 i i \li _. O - iiih - - - - — I- - I o 0 0 0 0 0 0 0-716 e F •sae 9.e-l2? € e e - e la' zoR4e , _ - Zm '0�SO P. C': � T. 0 0= _g� _ � ..:fr i S &11-1 : z c No> N 161 m Appendix B Dehumidification Upgrade Proposed Equipment Details City of Pickering Don Beer Arena Dehumidification Upgrade Feasibility Study 162 1 cep Concepts and Designs Rink#3 DH-1.48 Standard Desiccant Dehumidification Units INCORPORATED Unit Layout Drawing and Specifications ---- PIPING VESTIBULE DH ACCESS P ACCESS 0 0 SEA6NCE REACTIVATION HEATER ELECTRICAL BOX CLEARANCE 0 ACCESS - ACCESS II m • olifili---1-. Q �I 1 j II I II�' o , _ • N. - DHACCES _ ACCESS • APPROX. 0 SEANCE 0 SECTION A-A ELECTRICAL DROP •CLEARRSaCE ____L • J Am-- E X50) TOP SIDE VIEW 01_� (1.56) o (3:25} 0 r ROOF SNG a. aS . PENRETRATION MO) '■ 1 1.50 . .F ike K a,o • 0 o¢ L��,�+ z FjjtTI } i !tit' I BI- SET NR i+--:G---+�( H= �.--L�-.-I I 6F AIR V `.-t'7,' "II 11 FRONT Gibs VIEW RIGID'SIDE VIEW BACK SIDE VIEW LEFT SIDE VIEW �-..� `CONSULT FACTORY - CPTIONA.L 56 P?LY -LENGTH WILL VARY Nirl_ _ O AIR LOC.4T1OES -- HUTH HORSE POWER C ) ill a ,~ I�i A 20: ANT..t » !1; h.. "it G0;•i e.xm}I kg----2 CO t �1 "Ii �. �� ,L I II D 3 DRIVP.LIL LOCAI ON aoni0N SIDE V@W 't:i.eP OPTIONALRE11RN A P LOCATIONS Figure:Unit layout drawing of a right hand unit. Numbered balloons and dimensions are described in more detail below. 0. Unit Details 1. Process Air Inlet Opening 3. Desiccant Cassette cont.. - Unit Dimensions and Weight -Opening Dimensions and Specifications: . -Desiccant Cassette Specifications: Width(W)&overall(OW) ...63.0&75.0[n] Width(C)x Length(D) 30 x 26[in] Shaft diameter 1.0000[in] Base frame height(BH) 5.0[n] Face area 5.42[ft2] Frame size(WXHXD) 54°x54"x12.5" Height(H)&overall(OH)....60.0&77.6[in] Max face velocity 1,385[FPM] Tubing size(square) 1.50[in] Length(L) 98.0 pn] Static pressure drop 0.12[in W.C.] - All welded,304 stainless steel frame Approximate Unit weight 4,500[Ibs] Bottom opening covered with punched screen -Cassette to Rotor Air Seals: - Unit Construction: -Opening Options: Lifetime Viton®dual wiper blade seals 2"double wall,3.0#fiberglass insulation Location(bottom,top,end,or left side) 400°F continuous temperature rating 16 gauge,G-90 galvanized wall panels,roof Damper(none,manual,or modulating) -Rotor Drive System • panels,roof liners and floors -Air Mixing Options: . 1/30 HP gear motor,7.5 RPM,240:1 ratio 20 gauge,G-90 galvanized wall liners 100%return air Motor torque 220[n-Ibs] 12 gauge,G-90 galvanized perimeter and 80-100%return air/0-20%outside air 115V 1 PH 50/60Hz 0.45 FLA interior members for base(all welded) #40 Nickel-plated perimeter chain Univ.base for slab,donnage,or curb mount 2. Process Air Pre-Filters 11 tooth,0.625°bore,drive sprocket -Door Construction: -Filter Specifications: -Process Specifications: Extruded Santoprene®foam gasket 1.T thick double wall,urethane insulation Size 5x2"D) 5 Process face area 9.44[ft2] . 14°x25"x2° 5 Max face velocity 794[FPM] - Voltage Options(Direct Fired Burner or 16)x25°x2" 1 Max static pressure drop.....1.42[in W.C.] Steam Heating Coils for Reactivation): Face area 14.93[ft2] -Reactivation Specifications: Voltage FLA(MCA)MOP Max face velocity 5.02[FPM] Reactivation face area 3.15[ft2] 200V 3PH 60Hz 55.5(69.4)110 Mean static pressure drop...0.65[n W.C.] Max face velocity 630[FPM] 230V 3PH 60Hz 48.2(60.3)100 Dirty static pressure drop 1.00[in W.C.] Static pressure drop 1.42[in W.C.] 460V 3PH 60Hz 24.1(30.1)50 Filter efficiency 30%(MERV 6) 575V 3PH 60Hz 19.3(24.1)40 Filter bank is front-loading drop-in style • 4.Supply Air Outlet Opening - Voltage Options(Electric Resistance Coils 3. Desiccant Cassette - Opening Dimensions and Specifications: for Reactivation): Width(A)x Length Voltage FLA(MCA)MOP -Desiccant Rotor Specifications: O 9 (B)•••-...2. 916[in] Face area 2.89[ft2] 200V 3PH 60Hz Consult Factory Rotor diameter 48.03[in] Max face velocity 2,596[FPM] 230V 3PH 60Hz Consult Factory Rotor depth[nl([mml) 7.87(200) Static pressure drop 0.42(n W.C.] 460V 3PH 60Hz 206.3(212.3)250 Desiccant type Silica Gel Bottom opening covered with punched screen 575V 3PH 60Hz 165.1(169.9)200 Bearing(internal) Z99R10 -Opening Options: Location(bottom,top,or left side) F-7050-00(revision 000 on 6/13/2007) All dimensions and specifications are preliminary and may change. . Please consult factory for final dimensions and specifications • 163 Concepts end Designs . - D Rink#3 DH-148 (I Standard Desiccant Dehumidification Units INCORPORATED Unit Flow Drawing and Specifications DP BURNER - `..PREFILTER REACTIVATION FAN Dry Wet y O State Bulb Bulb Humidity Rat o _ _ 9 ^` + X1`, 1^- ' • (-'..` Point Temp Temp [grill)] `` r9 r9 � PROCESS AIR FLOW .. ;r ,*, p(;AGTIUP.TIO 4 3�,y yi, lfi \Y 1 A 65.0 64.9 92.5 f�,, \' ):1 " };,:: f - 'r t Y '_ B 65.0 64.9 92.5 ' t i 9 • AIR 57M ,te r - C 65.0 64.9 92.5 �� ;G• i? - z ESS max ,= D 107;6 68.7 42.6 _ ,,54 * }.{T: PROs t=. Q E 113.1 70.3 42.6 .. --- `' i~ " °� }e�` i 17x1 r fir+ Z K;c J REACTIVATION AIR FLOW .6,,,a.--. r R � �� s, %.!,;-,i5,.!;ir AIR OTF'P� . F 95.0 75.0 99.0 , _tc-- a �� Q G 95.0 75.0 99.0 x Y.-P. i:"-- " ,a t�}C `. "`= H 284.0 75.0 99.0 '--"`,�'`'' 4 `,' © b= SUPPLY FAN I 135.0 105.2 303.1 tc,,A,rsi, DESICCANT ROTOR J 135.0 105.2 303.1 PREFILTER DAMPER • Figure:Symbolic flow diagram of the desiccant system. • 5. Supply Fan and Motor 7. React.-DF Burner cont... 8. React.Air Outlet Opening -Performance Specifications: -Gas Thermal Content: - Opening Dimensions and Specifications: Max supply air volume 7,500[scfm] Natural gas 1,000[BTU/ft,] Width(J)x Height(K) 22 x 8[in] External static pressure 2.0[in W.C.] Propane 2,550[BTU/ft3] Face area 1:22[ft7] 200V(230V)3PH 60Hz.:.....39.0(34.0)FLA Max face velocity 1,622[FPM] -Max Supply Gas Flow Rate: 460V(575V)3PH 60Hz.......17.0(13.6)FLA Static pressure drop 0.17[n W.C.] Natural gas 539[CFH] -Fan Details Propane 211[CFH] Opening covered with a punched screen Fan wheel type Airfoil Blade - Opening Options: -Supply Gas Pipe Size: Housing style Direct Drive 7"to 14"W.0(low) 1[n) Location(end,right side,or top) Construction Class III 1 to 5 psig(med) %lin] Fan model 18°BIA Wheel 9. React. Fan and Motor -Motor Details 7. React.-Electric Resistance -Performance Specifications: Motor size and frame 15[HP]254T Max react.air volume 1,983[scfm] -Electrical Specifications: Motor speed 3,600[RPM] External static pressure 1.0[in W.C.] Motor type TEFC,E+ 200V(230V)3PH 60Hz Consult Factory 200V(230V)3PH 60Hz 14.0(12.0)FLA 460V(575V)3PH 60Hz 182.2(145.8)FLA 460V(575V)3PH 60Hz 6.0(4.8)FLA 6. React.Air Inlet Opening -Electric Resistance Coil(s)Data: -Fan Details Max power per coil(total)....29(145)[kW] - Opening Dimensions and Specifications: Fan wheel type Air Foil Blade Max power(total) 494,800[BTU/hr] Width(E)x Height(F) 24.5 x 24[in] Housing style Direct Drive Face area 4.08[ft2] Static pressure drop 0.5[n W.C.] Construction Class III Max face velocity 486[FPM] 7. React.-Steam Coils. Fan model 16"BIA Wheel Static pressure drop 0.02[n W.C.] - Motor Details Opening covered with a punched screen -)Steam Heating Coil Data: Motor size and frame 5[HP]184T • Steam Pressure jag 50(6i0 100 - Opening Options: Motor speed 3,600[RPM] • Location(end,right side,or top) Static press.drop[in W.C.]...0.94(0.69)1.08 Motor type 'TEFC,E+ Steam heating coil qty 4(3)2 6. Reactivation Air Pre-Filters Number coils/bank 1(1)1 , • Supply connection size[in] 1%(1'/)2'/z eel a -Filter Specifications: Return connection size[n] 1 14(1')2'% Size(WxHxD) Steam temperature[°F] 298(307)338 ": 24"x24"x2" 1 Lbs condensate[Ibs-H20/hr]565(566)636 . Face area 4.00[flz] -Steam Heating Coil Specifications: Max face velocity 496[FPM] . Mean static pressure drop 0.65[in W.C.] Fin length x fin height 24x22.5[n] , Dirty static pressure drop 1.00[in W.C.] Max air volume per coil 1,983[Z cfm] Face area 3.75[ft 2] Filter efficiency 30%(MERV 6) . Concepts and Designs Filter bank is front-loading drop-in style Max face velocity 529[FPM] -Coil Data: • INCORPORATED 7. React.-Direct Fired Burner Fins per inch(FPI) 11 2100 Park Drive NW -Burner Specifications: • Number ri rows 2 Owatonna,MN 55060 .•P Fin material&thickness AL(0.010[in]) Linear feet of burner 1'/:[ft] phone:507.451.2198 Tube material*&thickness..CU(0.035[in]) Max burner heat 538,900[BTU/hr] fax:507.451.1177 Casing material ,. Galvanized Static pressure drop 0.55[in W.C.] *Tube material is CU/NI for 100 psi steam . website:www.cdihvac.com • . email:sales @cdihvac.com All dimensions and specifications are preliminary and may change. F-7050-00(revision 000 on 6/13/2007) Please consult factory for final dimensions and specifications • 164 . X• LS. 3 300 < < O `O to a F V n 0000 O 0 M,o 0 U U a w co O F- 0�i al O K- �' Z h rbj i7 w0 b (n OO,\U\ m,\_U\ N^ =O - ' 2uW o-Cj E O cP Z 0 j, 3 0 iO LL < N h ■ r 3 O in 3 JZ w ��\ pn Qo Ooh Q N co t al t< W < W M r7 d i, `I p cc=oom�w��N. w? n<3Q�OO°'��nw ALSA- �� h 6 F`-' 9 U cc V . 0n_m�r_-cv?ro Fr>=vF Zr`OQN NP IL Lu ..<4.1 J NHIIHHP < W y p 0 cc 7 m W h V ■0 .2.O = WV N O p V ' O p F F 0 #W O 4 + -,� - - - Y ° LLJ•0 W W H: J W 3 Q ^ _ 1 0> d O�d< 0a W U F- D•J J 5e1� _ _ - i tl , w 0 CC W cc #WC�=HIJLW.�SV-t1Ow LLW<O JUO'" 2 _ P _ _ _ it �7 /LA's —< O _,.,3000.,3000 U c W a,___, -U I� 4 � `�1• V.°a 0 w0)-0 ,01-1-1--f,O1-1-V-W •din n , LL J<i-OLL=J 000Il=J000<<}«�ZZZ J b (.31-0 Z Umm E LUcoco ZZ O r i-U' (7N»>W dO ,G+ d �' —❑ AlddfS NOIIVAIIOVM °<MIiL_ zo W ' W .-, N U C J,Ny 1- rc Fa w <:.�. J_ O I- ce <~G LL 3 o• e e 0 w 000+F ~y Op i �OOLL U Z 0 JS a_ s FO-' F0 1-31,1 FF-< 0 (07 '.0d Q4 UEN°<r> W0N WUwiN J W dC �W 4R' w OpZF- 2 ZNJX w z< • c JO•K°..<„ F 0J0 ,JN << cc W v,F Z< �i O. LL z.. <LL' <.'^ J0 F-F < _ �d °tiJzoa 01-Z<N JZZ < dm <, 0, tt n czi W <W u_.. 1 J = .� D,-,Z.-ice CJ W<NZ <W O z°O FZ 30o` • n J F < < LL NO ¢ F-UWLL,w LL,.., Z1=._1~-.IV rZ.N ,3 °FZL N . O Z4LL Z J<x p3ZX.w dw �g d0 c-' .2.1—)-->. <°<. F- °< Sz �IFI� r,<?jLT,, Z5rX UQNX F F.-+ Z.Z. WF i zo <,d NO mmm Z =<U{/Fr7O N.-O.._ ,-LLB UQ Ul< 0z h< `n`n`� n p4 4 w <0 0z LJE if- idg 111' tilk8 rd ory ti 9w J X 3 T5 a A. wTo and N o X` w U JX N <g ! L PL zr w -''''-4”' w0 ws �<� �<i € 3 u o w$ . iE do IS 1 15i /i + _ ° Eke r, d� ` 8 . w J I' N I = _ = u!psi\ p P„ = = I,' ,„. • r1 1 I A _ILIA'pi ..0 n 2X / al „ n i,,, . F, Ea G ZoW L F ,_ d y� _LL Q Fq N ax cw uw Jo .-E g `�"T. . • <b w9 ¢ 3> F<3 <�� wn n •W ``°<3 gam= p u; LL Lu ¢ ` W • C . .6 165 ■ • Rink#s 1 &2 DC-1-11 68 Concept and Designs Standard Desiccant Dehumidification Units INCORPORATED Unit Layout Drawing and specifications - _-T PIPING VESTIBULE ACCESS OH ACCESS 0 0 MIN. ELECTRICAL BOX SERVICE REACTIVATION HEATER ACCESS CLEARANCE 0(INimwim.suppLY ACCESS • FAN AND MOTOR)° 187111. Z o Wa -Y-_-'°"° c •� FILTER ,N. CH ACCES ACCESS APPROX. 0 SERVICE 0 ELECTRICAL DROP CLEARyyANCE SECTION A•A -r J .� _-.___L -s. (250) TOP SIDE VIEW -"' E .- A STANDING (tti) APPROX.GAS (4 00)(3.25)-+•a-- Q ROOF SEA >S . PENETRATION Z 1.50 . h v¢ IFI �1�� ,,_,, <,1,17c- I, Qg, F T Pirilai ° '--I I Hl immon_i, i Q SUPPLY ' w 1.--� L- RETURN AIR _...1 BF AIR V .•-O'.1' FRONT SIDE VIEW RIGHT SIDE VEVI BACK SIDE VIEW LEFT SIDE VIEW `CONSULT FACTORY EMI OPTIONAL SLPPLY LENGTH WILL VARY !► AVi LOC.5110I.c WITH HORSE POTTER o MI Y °' ': C ` � al . ill III 6-.a-17177-0-1 MI I.,__;of, f - -,---:-_ 1-,,, 0 OPT WI_ 0 ,5 DAMI'FR I OCAT ON '"ti'.: �,. BD-OU SIDE VIEW 4, u OPTIGNALRE-URN AR LOCATIONS Figure:Unit layout drawing of a right hand unit Numbered balloons and dimensions are described in more detail below. 0. Unit Details 1. Process Air Inlet Opening 3. Desiccant Cassette cont... - Unit Dimensions and Weight -Opening Dimensions and Specifications: -Desiccant Cassette Specifications: • Width(W)&overall(OW) ...92.0&99.0[in] Width(C)x Length(D) 30 x 38[in] Shaft diameter 1.7717[n] Base frame height(BH) 7.0[in] Face area 7.92[ft2] Frame size(WxHxD) 76"x76"x13.5" Height(H)&overall(OH)....84.0&112.6[in] Max face velocity 1,895[FPM] Tubing size(square) 2.00[in] Length(L) 154.0[n] Static pressure drop 0.23[n W.C.] All welded,304 stainless steel frame Approximate Unit weight 6,000 fibs] Bottom opening covered with punched screen -Cassette to Rotor Air Seals: - Unit Construction: - Opening Options: Lifetime Viton®dual wiper blade seals 2"double wall,3.0#fiberglass insulation Location(bottom,top,end,or left side) 400°F continuous temperature rating 16 gauge,G-90 galvanized wall panels,roof Damper(none,manual,or modulating) -Rotor Drive System panels,roof liners and floors -Air Mixing Options: 1/20 HP gear motor,7.5 RPM,240:1 ratio • 20 gauge,G-90 galvanized wall liners 100%return air Motor torque 356[n-Ibs] 12 gauge,G-90 galvanized perimeter and 80-100%return air/0-20%outside air 115V 1 PH 50/60Hz 0.62 FLA interior members for base(all welded) #40 Nickel-plated perimeter chain Univ.base for slab,donnage,or curb mount 2. Process Air Pre-Filters 15 tooth,3/4"bore,drive sprocket - Door Construction: -Filter Specifications: -Process Specifications: Extruded Santoprene®foam gasket Size(WXHXD) Process face area 18.98[ft2] 1.7"thick double wall,urethane insulation 20"x20"x2" 12 Max face velocity 790[FPM] - Voltage Options(Direct Fired Burner or Face area 33.33[ft2] Max static pressure drop 1.41[n W.C.] Steam Heating Coils for Reactivation): Max face velocity 450[FPM] -Reactivation Specifications: Voltage FLA(MCA)MOP Mean static pressure drop...0.65[n W.C.] Reactivation face area 6.33[ft2] 200V 3PH 60Hz 92.8(116.0)200 Dirty static pressure drop 1.00[in W.C.] Max face velocity 629[FPM] 230V 3PH 60Hz 80.4(100.5)175 Filter efficiency 30%(MERV 6) Static pressure drop 1.41[n W.C.] 460V 3PH 60Hz 40.2(50.3)80 Filter bank is front-loading drop-in style 575V 3PH 60Hz 32.2(40.3)70 4.Supply Air Outlet Opening - Voltage Options(Electric Resistance Coils 3. Desiccant Cassette : Desiccant Specifications: - Opening Dimensions and Specifications:[i] for Reactivation): -Di t Rt S ifiti ) p Width(A)x Length(B) 38 8 x x 22 [ 24 n] Voltage FLA(MCA)MOP • Rotor diameter 68.11[n] Face area 6.33[ft2] 200V 3PH 60Hz Not Available Rotor depth[n]([mm]) 7.87(200) Max face velocity 2,368[FPM] 230V 3PH 60Hz Not Available Desiccant type Silica Gel Static pressure drop 0.35[in W.C.] 460V 3PH 60Hz Consult Factory Bearing(internal) 63092RS Bottom opening covered with punched screen 575V 3PH 60Hz Consult Factory - Opening Options: Location(bottom,top,or left side) • F-7070-00(revision'000 on 6/13/2007) All dimensions and specifications are preliminary and may change. I Please consult factory for final dimensions and specifications 166 • CD Concepts and Designs Rink#s 1 &2 DH-168 Standard Desiccant Dehumidification Units I N C O R P O R A T E D Unit Flow Drawing and Specifications • DF BURNER `PREFILTER REACTIVATION FAN , - ,, ,.. Dry Wet Humidity _ V s_` ©- y3 t State Bulb Bulb Ratio ? • z 13d Point Temp Temp _ti ['Fl [°F] [grllb] (� [ TLVPT : PROCESS AIR FLOW �,. RE G IOC t- t ` A 65.0 64.9 92.5 0 (.. �\,\�ti M 1 , y�y }, -4 B 65.0 64.9 92.5 {',[R ST '' t k .-- ,- C 65.0 64.9 92.5 �, %+ _ r�~ f.„7!',,, •D 107.7 68.7 42.5 I PROCESS r a- . 1 E E 112.2 70.0 42.5 -.L._ - + i lj *, 1 - d • REACTIVATION AIR FLOW '��' z y..l�h AIRST 'M F 95.0 75.0 99.0 = ' t \t 'J O R G 95.0 75.0 99.0 �y T i, �`' � may` H 284.0 75.0 99.0 -" ' r;•::i'.1 Q SUPPLY FAN I ' 135.0 105.2 303.0 O - 1:�, DESICCANT ROTOR J 135.0 105.2 303.0 -I' . PREFILTER DAMPER Figure:Symbolic flow diagram of the desiccant system. 5. Supply Fan and Motor 7. React.-OF Burner cont... 8. React.Air Outlet Opening -Performance Specifications: -Gas Thermal Content - Opening Dimensions and Specifications: Max supply air volume 15,000[scfm] Natural gas 1,000[BTU/ft3] Width(J)x Height(K) 32 x 12[in] Extemal static pressure 2.0[in W.C.] Propane 2,550[BTU/ft3] . Face area 2.67[ftz] 200V(230V)3PH 60Hz 69.8(60.6)FLA -Max Supply Gas Flow Rate: Max face velocity 1,491'[FPM] 460V(575V)3PH 60Hz 30.3(24.3)FLA Static pressure drop 0.14[in W.C.] Natural gas 1,078[CFH] -Fan Details , Propane 423[CFH] Opening covered with a punched screen Fan wheel type Airfoil Blade - Opening Options: -Supply Gas Pipe Size: Housing style Plenum Fan 7"to 14°W.0(low) 1'%[in]. Location(end,right side,or top) Construction Class III 1 to 5 psig(med) 1[in] Fan model • 28"CPN-BIA 9. React.Fan and Motor -Motor Details 7. React.-Electric Resistance -Performance Specifications: Motor size and frame 25[HP]284T Max react air volume 3,977[scfm] -Electrical Specifications: Motor speed 1,800[RPM] Extemal static pressure 1.0[in W.C.] Motor type •ODP,E+ 200V(230V)3PH 60Hz Not Available 200V(230V)3PH 60Hz 20.5(17.6)FLA 46 460V(575V)3PH 60Hz Consult Factory 460V(575V)3PH 60Hz 8.8(7.0)FLA 6. React.Air Inlet Opening -Electric Resistance Coil(s)Data: Fan Details I - Opening Dimensions and Specifications: Max power per coil(total)...:Consult Factory Fan wheel type Airfoil Blade Width(E)x Height(F) 37 x 34[in] Max power(total) Consult Factory Housing style Direct Drive Face area 8.74[ftz] Static pressure drop Consult Factory Construction Class III Max face velocity 455[FPM] 7. React.-Steam Coils Fan model 16"BIA Wheel Static pressure drop 0.02[in W.C.] -Motor Details Opening covered with a punched screen -Steam Heating Coil Data: Motor size and frame 7'/z[HP]213T -Opening Options: Steam Pressure si 501601100 100 Motor speed 3,600[RPM] . Location(end,right side,or top) Static press.drop[in W.C.]..0.89(0.65)0.72 Motor type TEFC,E+ Steam heating coil qty 4(3)2 • 6. Reactivation Air Pre-Filters Number coils/bank 1(1)1 cD Supply connection size[n]..1'/2(1%)2'/: -Filter Specifications: Return connection size[n]..1%(1%)2'/ Size(WxHxD) Steam temperature[°F] 298(307)338 16"x20"x2" 4 Lbs condensate[lbs-H2O/hr]1136(1139)1166 Face area 8.89[ft2) Steam Heating Coil Specifications: Max face velocity 447[FPM] Fin length x fin height 34 x 33[in] Mean static pressure drop...0.65[in W.C.] Max air volume per coil 3,977[scfm] Dirty static pressure drop 1.00[in W.C.] Face area 7.79[ftz] Filter efficiency 30%(MERV 6) Concepts and Designs Filter bank is front-loading drop-in style Max face velocity 511[FPM] -Coil Data: INCORPORATED 7. React.-Direct Fired Burner • Fins per inch(FPI) 11 2100 Park Drive NW Number of rows 2 -Burner Specifications: Owatonna,MN 55060 Fin material&thickness AL(0.010[in]) Linear feet of burner 3[ft] Tube material"&thickness..CU(0.035[n]) phone:507.451.2198 Max burner heat 1.077[MBTU/hr] Casing material Galvanized fax:507.451.1177 Static pressure drop 0.55[in W.C.] `Tube material is CU/Nl.for 100 psi steam website:www.cdihvac.com email:sales @cdihvac.com • All dimensions and specifications are preliminary and may change. F-7070-00(revision 000 on 6/13/2007) Please consult factory for final dimensions and specifications 167 Li U Y Z 1n Li ZJ < OW Z m W o O �O�LL� ig rows" Z w Li a cn w 0 nn O^-.111. OO•--, ���r¢ w �ZN W Z P n Q 1• J N UrrW L9 1,' ii<x 3 O < y ^ Q S F 1 O� 1Oa\ \ 6\ �^\ SO ■\ <�W�LL parr-1N ti• Op O S Y w h ti h E z 0 o r<-� M L re r"y >ZX N O rJi d ti h Q 3 I m c0 w OO=jo'>- O0<o Mwx °x z W�� WoN < in LL N 2 1L 0¢WV'N 2ON rH• O m Q O O CO coo a- 3 r rjrrOZ x U,J,`� D 0 J �y t 010 W 7O U a. OQ N LL < 0005p Zce.O Ow 7 d O 6Low O V w (DN O. C()wr# OWN 2'y < �� 5 ap 2 1 1 00.-..-.ryNr 1 V1V NVlr 1 V.--` 1 I NMU)I� OJN3Y ,..__J N_ I-71 O3 W_11i dU' ~ ~` Z m w 0 w n<<oLE lii Li_ dm D 0 W V t 1--O 1 1 O W r JZS O F-J U Fd �..1 k = O 3 W NJ co U' ',co �JU'Jr WM30 �FOW �O O 3w O m O 3 �� C❑ m r-1 rLL-; <[n Z ra HD0,--, 1Ji00 ZJ< HN w 0< V C SO 0J • O W� 1j K 1-o a O U Jw (.). �-,,,< l-F-¢ taw w S= O m 0 ' oO\W n\w J J 0Z_ N=Z Z < < <Z< 1'r CO Sr u� 1yrC K a_�L((yy�J y�fp�YJ Oj<IZ-1U<<OX 'N"111Ni 1mi H10y10 Z<� �`�W �= m W(n goof �ik Wcc, rLLr,re }'�K¢IJL �� 1-01-.1-« Or‹ U• .(1N-1-1 CX r 1-Z : _< Or Wa\3000a\3000,Ur Ur.r \ W 38w•-'sS W1..-1N W• SN E s _E 0 cn U' Y0f Orrr 0 H H H <m lLl r. X !- <--1,5 US 0, fir.pZ d W OLL <aO1L�J0001LX JOOZDW Q J Z6<? Z —o047-, N<N Y)3< V'< In 100 E —❑ U I-0�U co m f f f U[n m 1:2: CO t1-(7 W O L E AlddnS NOU VAllDV3t 4 <g J 1 O o N IIJ T X LC 0 Z' � N m = n • N • N • , . s. . _ oZ 4 h< . o� O y wdd fi & I1- • W r 1Lw rn b <w Q 0X 6 Z0 1- m <N S o UU K q J� LL�� p o m� X js < '§ 36 • • Uh .U., > J WIr Q Ka =2 !!.r �u g "d« wo ffim I '4 lii !llmiiiil / , I.�I 7 SX c1- 03� 11.._MI o a ,Ili _I \ qo I h e 1� ux • , ,• . o '! <n I .. g 70 e {'yam I tLz J ',� W J �I � 3 L.E. 1 WI .....=,...5 t t 3E"' IlmliNir t . m d ce ma 1 NEW �y ammo g 4 >g ¢5 CJ ¢ < o Li,- • 0 Z LL r w v U 16if ,,,,.,, fn r- -_ Appendix C Structural Conceptual. Drawings City of Pickering Don Beer Arena Dehumidification Upgrade Feasibility Study 169 • vgYi a�f }.. .,w _ J0 J - C— ti ci rte` „>s:, 'M m "� ,'•� - i Z • "i . i z ��V�- .> 3 a ;ate co•R 4 � ak?a. xS _ � � Z N m < t .. - ' ? . .3. Q.• Y p Z Z t- ' f L J• At A,yL e �"• l p 0 W' $ _` Y I o Q - O_C : w _ 1 LL m U . -4 '.''''' -''•A:1".. %:it,". ;:f.":. -1.3,.' t,•V'''•4""":4't x_ ,�.33 �t 4 y�Fy,Ay.-k�° -5 .,:z.,91-` �J.f J o ;117,1-40•LP • „.. y • • O is A iC;�! x J .: 3 p O �� O 6 w 3 'mot l F T . [ y.1tiE ¢ Q ~ 0 7:* ' Vx i Cl Q �xr-� +x v W Z z ml W N 0 Q CD J -J m Y f F- Q 0 0Y O J WW 0Q 2 0 < 0 w J Yz ccsi OJ O wo U . m2 wz x O a W z ¢a �� j ¢ � w_5. =o <W O o Om • 0w0 z°—� z J w CO,«� 00 mY m Q�' m 2 �. _ pZ �z �ww �U o D pz 0� IE°il 00 w2 0u Q� m 0 wU wo Fo mI m w UW CLQZ Zo E Z z O Zw-' R2 oZ QW� o mww, c,Q w ?W - _ fir __ `n▪ooaU WH wY Yooct rZ? Qz0_J �O ° 3 O ` __�` cWi�OwoO� ON WF OmZ= Q m-U` ZZ ww 0 2 Z co, UIF2-Q0 FO c2_ 0E- ' Ni'r • Zz wui Q p m r '� Nr z n0 wwmw_O c^rm. �aww� m� u~i ems.... a....4 �°„Q,—'o wz WZt Z.J %; F-F- wg w o LLi7� mF2-w2p zQ QI-Qp2�m o°-m . WOOD ow LL w LAX °1}1-1' H QQ WZQZYm_ ` Nson w U` �LL Q� U ^� HWOFI_ F-O cr<o OZW O mrN Zwr ��o1- a d ELM. CAM =0o¢Z �a �m� 0 �� y ix wF-m mzm a 0 z +f -F--0wo om �+ zgoo 1-go m Z UZ �Z JUQZQWZ �iDm 0 IpQ �u) Y Q coo-z< x Qpui - Q0 0-Q Zd.ON° w 00Zo 0 WWui=wm0[OW 4 LO ZOO°0 2 w7w w_ 20 < �OwZmZwU7Qw U`▪02� 0 Dmpm -w-Z- C7JaJ QwQQO OQNQIQOC70 J m wmmWQOQz0w06.F J2 2roo U�U0w • 0 zozvzzz'ZN < 1 �OWwmy UOO W7WwY Q>_ iAm�d mOmZZ QJfn UU)ID.u)uy'�� F'•Z w _JQ>OW0Z}WZJ=-JJJO ILI Qc Qc?O oWWmW?WW0m Q-y Q WZWc,U-Oza0JO>JJJU S LLLLWc0 J0o00m000) .J W cl cc[1_0 o<o0<m>000Q 0 D) c c G 6 7 N '.n d: ". O—. N 6.- N <h V' In W.h ¢ W ix I -: 2 2 z 2 O N Q W O . F- Z m m O Q W U K • F, WW w0 OaOW mm m 0 N W U m0 Zit W Z p0 co cc O W U W O UW _z F5. OO=F- 06 Q H F- < m z J2 0 ujcXo~ <w 2 Z LLO 0 QW j 002 z >- w ?02 m0 m? JJFp ZO Z1p W Z J 0 00 z Z m m0 QO 0 J op J �N p m m . wmwOW0O.FO� Hmzw aQ� co Q U m m0 2, o 0 1--20- Qm o M _ �j O Wa 0 Q o • -1°0 01-m 2 W Z m Z J Q m w O z uy 2 J • H 0m 0 2 w W Q Q 0°Dw MW U ? m z W 0 J2 W U d Q J U 0 w m O W m 0 W z- w Q ~ m W z Z Q -—MD-a Q W w x m m Q 2 O 2 0 U Z U p Z w 0 W> � m = F-6 0 1- ?Q,z -2 mJ 2 0 1- m W 0 Z �i W 2 fD J Z X Q�Z p J YJQ00zOp(2Zm,oO -om wwJJ z yam H m! IH wE z m H 01- m 2. o wli Q -��Q?¢O O0<0 z pw0 m m w MW z O w o O w 2>w 0 0 0 Z O O Z z U a Z . w Y O▪O w Q 0 ▪ m W • ZU` OWZQmO aC0<I.�O~ UDwm QW0W m FZD m�OZ Q2�J�QjymF-Q2 J QmZ Om OZWUW>NmQO • wi-<_,00. DOw ,p 0ZJ Qwww w w=0 20Kw2C9QOmgcO F- J0o0 .J wamZOwrxWW ;cci- vy_0-,w,a0m0mxzZO 00 Em„m m cw.�~0 w-~wx2o°2°,7wF w wwm =p w7, -,01(2 wm3QJLLLL .° .woopp, 2LL, a-wz w,„5 z 0<-60,0 ,m0,og w mow mm O°=woQ,Qpw zUZw000�tYmOW2W0 zC�00zw02 ww , wz� cooD0w0 OOOwz O•-mZ_.- mZ_mFF--2JQ�>Ow w 0<mZFQ-0000 zFZ J w02gm Q2o QZZW00 ZO-imwzzwOU zww- m•HO amwm U2z0~U' wd Om2 ww0H0DUmmmQ .- ZWF�QWZO0 W 0ODUOvOZZJ0m0LL>JmmO�ypF-Ue UWV�QjywJ QwpZzt--UmaU w. ZW U�UCJ�d'K2000WJW WQOF"W WUJ M-Jp ZU .Q Q6J ZJ ZOQJ mz-i, ‹, U�‹,z- ‹,:, � 7 .,,,Ommciy..<„O5QF-F-,ZF-000 zQQ.Q Qmm OQ 00Q OOamQ000zQOm.Ii0Qm,cn,Qm.QOQOLL 1 ! O a N 7 V) CD RN f7 V 0 M 7. N [. a tD 0. N 07 O. . f • g O - C i I w U w Ld in 1141.10 , I o CO F— X � z LL W W rn D 0 w o c=a, , I 0 ii— I ,.....,,,,,,.:-.7. 2,-,,i!i.::.. ° Z w g r g• @ ■ ° . N • W W ix 5 z 2 Q • 31 I f I ! W O Z LLO O / Lll-,ozIS9E9 . / o g o rn ui o I o z ■O = w w •¢ Y cc y U Q Q • O 3Z O r r �' ssnalx3 ' V O i . uS � • = I I # . W 1 Z lL M 'I g m W �' F.k-. w-�oN m 0. 0 J u; 7_, cc)m 3 m H Z v - ' " K U LL O . ��ssnal.x3r- /1 f- _ m,a ILLI • ^ o \ /�r i \/. W z m = i \/ W LO / P' ��\ I / \1NN = o \ i / e�y '0 \ I/ �oz \ Jr.-- �1, ssnal x3 L i z o --\\)11.111 m W• v o 1 •I Z r... I I Z • I 14622 1 I T X W • O L�,zzl tug O 171 • • O o co • LL 3! \r • �> _ o o F�. w • '°:i a h • z w ..� o o > . P 'a z z 7i C''"i ?ti . Y g'i av to . sj H m i ; .cn cn m �i . z i I if _ -cc cC iil Z w i / , j W U o i Z O r . iI' Z Q Z Z (/ = U Q L.,.., ui (21 u� 2 yd �' in O a OU A w O I° .o N 1I w J z §; 1�Y s c Z c m w E N o m F 9 `y o • K S U' LL p O. . E°n LL 2o m � °o /1 - - .- u, nmra 8 W Za CO) O — U W Q z 0 0 ik i W w a '= i w o m cc E. o z I, . w z I o z I . U • . • i it CO U F 0 y K CO 4? = o CC - er M D- U co u, x . 172 1 CO i . Ca co a cn = Z 3 W R < K U O y r W a rn m x O > I c ♦1 O li, w z a' awe U Z r t o �� o o X06: W o Es W cc v y O U Z IN ' Z y O o < < rn 0 J = Y O Q p Q I Lu z° m J w i Y O v X d ¢ Z < d 5 Z U W Fr Z K Y W cc 2()d 2 a O U < t L oc" W¢a o" __I p- W 0 U-1 0 ■ pwm 2 m P' p m Z 5 ?O Wo Dow = 0. F $ �z x- c2 7.'2' $o°. mVO§ N e N trArAf m H m 275 Or K U m i m 20t„-0 ■O _I l I 1 1 I __ I I t I f I I f I {�il = 2g 2 LI Ek:7■�j� .ti =_ m q -___ 2 moo I C J o C Z J Y W Z W< Z O< 8U-I K � I Z a0 W< U j O Cl) j W Z U W } r Z LL U O ` (7 J T pN <• Z K 2 0 w W O U = V —�I C U W v U o o�I o II O 0a w O O 0) Z o cc l) O mo5 w 0 o =u (1) Hi I o s z o J C ¢ .J }} O O “9 I''. O J w p 2 V Q w O S d ® W i O _ missim=h imi e E I _ m.-----d ' o - 6 O co n W 173 a) • al Q E a) l- ip I D . Lo CD_ 2 E , _c 0 ., v) O v) >. N O O 0 0 O O as O C N I- a) Q CD W V) C Cr) 1 O co •---' C U a 4-- C O - as C • Q o -iii 15 C .0 co V D c N a) a a) c O o V o C O O C C C - N .0 E o E o o D a) a) L (6 ¢ N (6 ((f O U 42 N : -c N to 0 .0C N 0 0 0 co N 0 0 o i 0 0 0 C y L O - O L o o U •O v) O O a (fl _al o) > E E E E (6 v, u) -o o a) O .. a) O O O a) c r' C 5 C C 7 7 O E RI ca a) U W Q J 11.1 < < < N N a) co O O C) 0 0 0 0 0 0 0 0 0 0 0 0 O - O O O to Lo 0 0 0 0 0 0 0 0 co 0 0 0 N ob O O O C) M 0 0 0 0 0 0 0 tO t1) N M _ 1: w N O O O L() M CO U) O O d' O O C) Ln c' O •d• U) • 0 N 2' O O CD N a- 6) O O N O O ,- - O - CO T■ (6 U C Cr. O I- N O N. N O (D t() O c- N CO LD M v) a) O M CO d• M CO N N N N I- CD CO N a) O C :N M M N N N CO Cl `-�M •C _o a) O c o D V a 2 O U 0 a) -0 O O C -o U co c o c o 0 o cn 0 y -c R .N, 3 L Q U o C v) O 'O i U chi `- o C o N N. N O (6 t d CO O O .J 0 C6 F- 1 C + C6 C ( L. --- .7 O 7 d o U o 2 11 'U LL 'a ti C E o t o C Q a) o y U� C I- C 3 o U C C E 0 0 O N N V C -O p `. U. L W C U > 'a I Ts o a ., o O a Up p O d 0 N o a)rt _en N O U c Q O O N . Z 0. U H O U r N 6 a) Q E� m d O Q 1:3 -o a ~' `- •a v) U d r C LO RI P.1 O a �) O -0 (6 >,U ' O a)C C O > y E E o H Z I- 4.) rn C C a) a o . cj o M a) o (a, as_ v) O d v L I. . U U .fl V 2 E 'o .o c ,- O .0 O v) C c a c w 1- O H ., 'O O Et E. H , c o 7 (6 a) (n " 0 O O v) O O (n ►. (n o C •a , _ _ n) I- m I- I- = C0 I- = Qr N M gm 174