Heatcraft Refrigeration Products Unit Coolers H-IM-UC User's Manual
Contents
1. Inspect drain pan periodically to insure free drainage of condensate If drain pan contains standing water check for proper installation The drain pan should be cleaned regularly with warm soapy water WARNING All power must be disconnected before clean ing Drain pan also serves as cover of hazard ous moving parts Operation of unit without drain pan constitutes a hazard Traps on low temperature units must be outside of refrigerated enclosures Traps subject to freezing temperatures must be wrapped with heat tape and insulated NOTE Always trap single evaporator system drain lines individually to prevent humidity migration Figure 5 Condensate Drain Lines DRAIN LINE MIN PITCH 1 4 FT VAPOR SEAL TRAP IST NSSSSASSSSSSSSSNSNSNS OPEN DRAIN Field Wiring WARNING All wiring must be done in accordance with applicable codes and local ordinances The field wiring should enter the areas as provided on the unit The wiring diagram for each unit is located on the inside of the electrical panel door All field wiring should be done in a professional manner and in accordance with all governing codes Before operating unit double check all wiring connections including the factory terminals Factory connections can vibrate loose during shipment 1 Theserial data tag on the unit is marked with the electrical characteristic for wiring the unit 2 Consult the wiring diagram in the unit cooler2. 7 7 11 07 1d i M Worldwide Refrigeration August 2008 Part No 25008201 Replaces None Information formerly included in H IM 64L Unit Coolers um MM SS J A 3 mE P L E 4 SS Dy yy M M SEL Uy NS l ZU 4 N V D Uy y I E Table of Contents General Safety Information cssscscssssccsccsccsscsscssssesssssessessessesses 2 Check Out and Start Up eod a ate D ito t ett 5 WIS DECUION NE EET TTD he 2 Operational Check Out essoessessoesoessoesoessoesoessoesocssossocssossoessoesoessossoes 6 Warranty Statement oho ier pr Or rer eb E ae Io Eo a iwi FCR RUE 2 Evaporator Superh eat iov Yd Va ais eda Y UE E CA VER iUd 6 Placement eei e here t Ev EE ERU RN EE EA 3 4 X Expansion Valve Selection 1 eere eres ee eene eene eene eene eene 7 Defrost IroubleshooOtlfig rien URN PEN eere vL RUPEE RR EL dk no 4 Evaporator Troubleshooting eeeee eee e eee eee eene en ent 8 Condensate Dralm Elnges aue ir Peor CERRAR REVUE I OC EUR 5 nterLink Replacement Parts cssccsssccssscsssccssccssccssscesssccssceesnes 8 Field Wirin G oeaiei aro n REGN D ROUES e RENI EAE 5 H IM UC 0808 Version 000 HEATCRAFT Installation and Operations Manual General Safety Information 1 Installation and maintenance to be
3. air throw distance must be considered O C 4 3 ie p Y ua MZ M Baffled Unit Allow sufficient SS space between rear of Unit Coole Dm Sm Where one wall evaporator mounting is satisfactory air Refer to Figures 1 through 3 page 3 for proper space Defrost Troubleshooting Fan Motor Ifthe motor does not operate or it cycles on thermal overload remove motor leads from terminal block and apply correct voltage across the leads If motor still does not operate satisfactorily it must be replaced Before starting the unit rotate fan blades to make sure they turn freely and have sufficient clearance Fan Delay amp Defrost Termination Control This control is a single pole double throw switch The red lead wire is wired to common The black wire is wired in series with the fan motors The brown wire is wired in series with the defrost termination solenoid in the timer The brown and red contacts close and the black and red contacts open when the temperature is above 55 F The black and red contacts close and the brown and red contacts open when the temperature is below 35 F On initial pull down of a warm box the fan will not start until the coil temperature reaches approximately 35 F If the box is still comparatively warm 60 F when the fan starts then blowing this warm air over the coil may cause it to warm up to 55 F and thus stop the fan Therefore the fan may recycl
4. and in the con densing unit for proper connections 3 Wire type should be of copper conductor only and of the proper size to handle the connected load 4 Theunit must be grounded 5 For multiple evaporator systems the defrost termination controls should be wired in series Follow the wiring diagrams for multiple evaporator systems carefully This will assure complete defrost of all evaporators in the system 6 Multiple evaporator systems should operate off of one ther mostat 7 Ifa remote defrost timer is to be used the timer should be located outside the refrigerated space Check Out and Start Up NOTE All adjustable controls and valves must be field adjusted to meet desired operation There are no factory preset controls or valve adjustments This includes low pressure high pressure adjustable head pressure systems and expansion valves After the installation has been completed the following points should be covered before the system is placed in operation a Check all electrical and refrigerant connections Be sure they are all tight b Check the room thermostat for normal operation and adjust c Wiring diagrams instruction bulletins etc attached to the condensing units should be read and filed for future reference d All fan motors on evaporators should be checked for proper rotation Fan motor mounts should be carefully checked for tightness and proper alignment e Electric and hot gas ev
5. performed only by qualified personnel who are familiar with this type of equipment 2 Some units are pressurized with dry air or inert gas All units must be evacuated before charging the system with refrigerant 3 Make sure that all field wiring conforms to the requirements of the equipment and all applicable national and local codes 4 Avoid contact with sharp edges and coil surfaces They are a potential injury hazard 5 Make sure all power sources are disconnected before any service work is done on units WARNING Refrigerant can be harmful if itis inhaled Refrigerant must be used and recovered responsibly Failure to follow this warning may result in personal injury or death Inspection Responsibility should be assigned to a dependable individual at the jobsiteto receive material Each shipment should be carefully checked against the bill of lading The shipping receipt should not be signed until all items listed on the bill of lading have been accounted Check carefully for concealed damage Any shortage or damages should be reported to the delivering carrier Damaged material becomes the delivering carrier s responsibility and should not be returned to the manufacturer unless prior approval is given to do so When uncrating care should betaken to prevent damage Heavy equipment should be left on its shipping base until it has been moved to the final location Check the serial tag information with invoice Report any di
6. Incorrect or missing distributor nozzle Replacement Parts by l nter LINK Commercial Refrigeration Parts POSSIBLE CORRECTIVE STEPS 1 Close switch 2 Replace fuses Check for short circuits or overload conditions 3 Replace motor 4 Replace defective component 5 Wait for completion of cycle 6 Adjust fan delay setting of thermostat See Defrost Thermostat Section of this bulletin Adjust thermostat Adjust thermal expansion valve Add refrigerant Manually defrost coil Check defrost controls for malfunction Relocate unit cooler or add strip curtain to door opening Seal unwanted openings in room Adjust defrost termination thermostat Defective defrost thermostat or not adjusted properly Replace defective component Reduce number of defrosts Check heater operation Adjust timer for more defrost cycles Adjust defrost thermostat or timer for longer cycle Replace defective component Replace heater Check and adjust if necessary Clean drain line Replace heater Replace defective component Replace heater Relocate evaporator Adjust defrost termination setting higher Add or replace nozzle with appropriately sized orif ice for conditions InterLink is your link to a complete line of dependable and certified commercial refrigeration parts accessories and innovative electronic controls for all Heatcraft Refrigeration Products HRP brands inclu
7. afe Check drain pan for proper drainage Install instruction card and control system diagram for use of building manager or owner T2 Evaporator Superheat Check Your Superheat After the box temperature has reached or is close to reaching the desired temperature the evaporator superheat should be checked and adjustments made if necessary Generally systems with a design TD of 10 F should have a superheat value of 6 to 10 F for maximum efficiency For systems operating at higher TD s the superheat can be adjusted to 12 to 15 F as required Minimum compressor suction superheat of 20 F may override these recommendations on some systems with short line runs To properly determine the superheat ofthe evaporator the following procedure is the method Heatcraft recommends WARNING Ifthe condensing unit has no flooded condenser head pressure control the condensing unit must have the discharge pressure above the equivalent 105 F condensing pressure 1 Measure the temperature of the suction line at the point the bulb is clamped 2 Obtain the suction pressure that exists in the suction line at the bulb location by either of the following methods a Agaugein the external equalized line will indicate the pressure directly and accurately b Agauge directly in the suction line near the evaporator or directly in the suction header of the evaporator will yield the same reading as 2a above 3 Convert the pressure o
8. aporator fan motors should be temporarily wired for continuous operation until the room temperature has stabilized f Do not leave unit unattended until the system has reached normal operating conditions and the oil charge has been properly adjusted to maintain the oil level between 1 4 and bottom of the sight glass g Make sure all Schrader valve caps are in place and tight HEATCRAFT Installation and Operations Manual Operational Check Out After the system has been charged and has operated for at least two hours at normal operating conditions without any indication of malfunction it should be allowed to operate overnight on automatic controls Thenathorough recheck of the evaporator operation should be made as follows a Checkliquidline sight glass and expansion valve operation If there are indications that more refrigerant is required leaktestall connections and system components and repair any leaks before adding refrigerant b Thermostatic expansion valves must be checked for proper superheat settings Feeler bulbs must bein positive contact with thesuctionline and should beinsulated Valves set at high superheat will lower refrigeration capacity Low superheat promotes liquid slugging and compressor bearing washout c Check defrost controls for initiation and termination settings and length of defrost period Set fail safe at length of defrost 25 Example 20 minute defrost 5 minutes 25 minute fail s
9. ation will use P for refrigerant code Table 2 Expansion Valve Selection 180 Head Pressure Valve R 507 R404A R 507 R404A BTUH at about 25 F 4 C Evap mE Sporlan Sporlan Sporlan Sporlan Table 3 Evaporator Troubleshooting Chart SYMPTOMS Fan s will not operate Room temperature too high Ice accumulating on ceiling around evaporator and or on fan guards venturi or blades Coil not clearing of frost during defrost cycle Ice accumulating in drain pan Uneven coil frosting POSSIBLE CAUSES Main switch open Blown fuses Defective motor Defective timer or defrost thermostat Unit in defrost cycle Coil does not get cold enough to reset thermostat Room thermostat set too high Superheat too high System low on refrigerant Coil iced up Unit cooler located too close to doors Heavy air infiltration Defrost duration is too long Fan delay not delaying fans after defrost period Defective defrost thermostat or timer Too many defrosts Coil temperature not getting above freezing point during defrost 2 Not enough defrost cycles per day 3 Defrost cycle too short 4 Defective timer or defrost thermostat Defective heater Unit not pitched properly Drain line plugged Defective drain line heater Defective timer or thermostat Defective heater Located too close to door or opening Defrost termination set too low
10. btained in 2a or 2b above to saturated evaporator temperature by using a temperature pressure chart 4 Subtract the saturated temperature from the actual suction line temperature The difference is Superheat Alternative Superheat Method The most accurate method of measuring superheat is found by following the previous procedure Temperature Pressure method However that method may not always be practical An alternative method which will yield fairly accurate results is the temperature temperature method 1 Measure the temperature of the suction line at the point the bulb is clamped outlet 2 Measure the temperature of one of the distributor tubes close to the evaporator coil inlet 3 Subtract the inlet temperature from the outlet temperature The difference is Superheat This method will yield fairly accurate results as long as the pressure drop through the evaporator coil is low Figure 6 Bulb and Contact Location Flow from upper valve cannot affect bulb tine free draining Inverted trap to avoid oil draining into idle evaporator Free draining Unit Coolers HEATCRAFT Table 1 Expansion Valve Selection For 100 Head Pressure Valve R 507 R404A R 507 R404A eaaa 25 F 4 C Evap Sporlan Sporlan Sporlan Sporlan NOTES 1 Valve selections assume standard conditions and 100 F vapor free liquid 2 Equivalent valve may be used in place of selection 3 For Medium Temp R 507 valve design
11. ding Bohn Larkin Climate Control and Chandler At InterLink we provide our wholesalers with a comprehensive selection of product solutions and innovative technologies for the installed customer base And every product is built to ensure the same high performance standards with which all HRP brands are built backed by a dedicated team to serve every customer need delivering at the best lead times in the industry Replacement parts should be obtained from your local InterLink wholesaler Replacement parts which are covered under the terms of the warranty statement on page 2 of this manual will be reimbursed for total part cost only The original invoice from the parts supplier must accompany all warranty claims for replacement part reimbursement Heatcraft Refrigeration Products reserves the right to adjust the compensation amount paid on any parts submitted for warranty reimbursement when a parts supplier s original invoice is not provided with a claim For more information call 800 686 7278 or visit www interlinkparts com For more detailed information on the following topics please visit http heatcraftrpd com service publibrary asp for our complete Refrigeration Systems Installation and Operation Manual H IM 64L Defrost Thermostat Refrigerant Charging Instructions Expansion Valves amp Nozzles System Balancing Compressor Superheat Refrigerant Oils General Sequence and Operation Recommended Refrigerant Piping Practices Troubleshootin
12. e may be frozen The drain line should be pitched sharply and exit cabinet as quickly as possible Sometimes location and ambient at the drain outside of cabinet may cause freeze up A drain line heater may be required to correct the freeze up Any traps in the drain line must be located in a warm ambient Unit Coolers HEATCRAFT Condensate Drain Lines Either copper or steel drainlinesshould be used and properly protected from freezing In running drain lines provide a minimum 1 4 inch per foot pitch for proper drainage Drain lines should be at least as large as the evaporator drain connection All plumbing connections should be made in accordance with local plumbing codes All condensate drain lines must be trapped and run to an open drain They must never be connected directly to the sewer system Traps in the drain line must be located in a warm ambient We recommend a trap on each evaporator drain line prior to any tee connections Traps located outside or extensive outside runs of drain line must be wrapped with a drain line heater The heater should be connected so that it operates continuously It is recommended that the drain line be insulated to prevent heat loss A heat input of 20 watts per linear foot of drain line for OF 18 C room applications and 30 watts per linear foot for 20 F 29 C roomsis satisfactory In freezers the evaporator drain pan fitting should be included when heating and insulating the drain line
13. e on initial pull down This control cannot be adjusted and wall to permit free return of the area above the unit cooler must be sealed or exposed in such a way to facilitate hand cleaning without the use of tools When lagging or bolting the unit flush to the ceiling seal the joint between the top and the ceiling with an NSF listed sealantand ends of open hanger channels must be sealed to prevent accumulation of foreign matter When locating unit coolers in a cooler or freezer refer to Figures 1 through 4 for guidelines NOTE Always avoid placement of Unit Coolers direct above doors and door openings N Baffle Glass Display Door Cooler or Freezer with Glass Display Doors Elevation view of glass display door cooler or freezer Be sure air discharge blows above not directly at doors Provide baffle if door extends above blower level Ifthe fan motor fails to start when the control is below 35 F disconnect the fan motor leads and check the motor as described for fan motors Also check whether current is being supplied at N and 4 from the timer The fan delay control must be below 35 F when checking for a closed circuit Defrost Heater If unit shows very little or no defrosting and does not heat disconnect heater and checkto find ifitis burned out Totest apply correct voltage across heater or use continuity flashlight battery tester Drain Pan If drain pan has an ice build up drain lin
14. g Guides Line Sizing Charts Preventive Maintenance Guidelines Hot Gas Defrost Systems Typical Wiring Diagrams Evacuation and Leak Detection Since product improvement is a continuing effort we reserve the right to make changes in specifications without notice The name behind the brands you trust HEATCRAFT THE COLD STANDARD H IM UC 0808 CLIMATE GnterLINK gt Aor InterLINK Commercial Refrigeration Parts CHANDLER
15. itions should be adhered to when installing this unit to maintain the manufacturers warranty a System piping must be in accordance with good refrigeration practices b Inert gas must be charged into the piping during brazing c The power supply to the unit must meet the following conditions A Three phase voltages must be 1096 of nameplate ratings Single phase must be within 10 or 596 of nameplate ratings B Phase imbalance cannot exceed 2 d A All control and safety switch circuits must be properly connected according to the wiring diagram e The factory installed wiring and piping must not be changed without written factory approval f All equipment is installed in accordance with Heatcraft Refrigeration Products specified minimum clearances 2008 Heatcraft Refrigeration Products LLC Unit Coolers HEATCRAFT Recommended Unit Cooler Placement Some general rules for evaporator placement which must be followed are 1 The air pattern must cover the entire room The size and shape of the storage will generally determine the 2 NEVER locate evaporators over doors type and number of evaporators to be used and their location 3 Location of aisles racks etc must be known The following are some typical examples 4 Location relative to compressors for minimum pipe runs 5 Location of condensate drains for minimum run NOTE Leave space equal to unit height between bottom of unit and product Do not stack p
16. mosphere accident or if operation is contrary to SELLER s or manufacturer s recommendations or if the serial number has been altered defaced or removed Seller makes no express warranties except as noted above All implied warranties are limited to the duration ofthe Express Warranty Liability for incidental and consequential damages is excluded The forgoing is in lieu of all other warranties express or implied notwithstanding the provisions ofthe uniform commercial code the Magnuson Moss Warranty Federal Trade Commission Improvement Act or any other statutory or common law federal or state 2 SELLER makes no warranty express or implied of fitness for any particular purpose or of any nature whatsoever with respect to products manufactures or sold by seller hereunder except as specifically set forth above and on the face hereof It is expressly understood and agreed that SELLER shall not be liable to buyer or any customer of buyer for direct or indirect special incidental consequential or penal damages or for any expenses incurred by reason of the use or misuse by buyer or third parties of said products To the extent said products may be considered consumer products As defined in Sec 101 of the Magnuson Moss Warranty Federal Trade Commission Improvement Act SELLER makes no warranty of any kind express or implied to consumers except as specifically set forth above and on the face hereof The following cond
17. roduct in front of fans Minimum Unit Clearances Figure 1 Medium Profile and Large Unit Coolers NOTE W Total width of evaporator coil surface One eva porator Two eva porators Figure 2 Low Profile Unit Coolers NOTE H Total height y Y coil surface PLAN VIEW AIRFLOW Two evaporators One evaporator Figure 3 Center Mount Unit Coolers Recommended Maximum Minimum Dimensions for Center Mount Unit Cooler Installations E S M T Max Min Max Min Max Min Max Min 25 2 20 3 40 3 40 6 HEATCRAFT Installation and Operations Manual Unit Cooler Mounting Most evaporators can be mounted with rod hangers lag screws or bolts Use 5 16 bolt and washers or rod for up to 250 pounds 3 8 for up to 600 pounds and 5 8 for over 600 pounds Care should be taken to mount the units level so that condensate drains properly Note that some unit cooler designs achieve drain pan slope by using different height mounting brackets In this situation the top of the mounting brackets should be level Adequate support must be provided to hold the weight of the unit When using rod hangers allow adequate space between the top of the unit and the ceiling for cleaning To comply with NSF Standard 7 Figure 4 Large Coolers and Freezers Placement per Cooler or Freezers where one wall will not accommodate all required evaporators or where
18. screpancies to your Heatcraft Refrigeration Products Sales Representative Warranty Statement Seller warrants to its direct purchasers that products including Service Parts manufactured by SELLER shall be of a merchantable quality free of defects in material or workmanship under normal use and service for a period of one 1 year from date of original installation or eighteen 18 months from date of shipment by SELLER whichever first occurs Any product covered by this order found to Seller s satisfaction to be defective upon examination at Seller s factory will at SELLER s option be repaired or replaced and returned to Buyer via lowest common carrier or SELLER may at its option grant Buyer a credit for the purchase price of the defective article Upon return of a defective product to SELLER s plant freight prepaid by Buyer correction of such defect by repair or replacement and return freight via lowest common carrier shall constitute full performance by SELLER of its obligations hereunder SELLER shall have no liability for expenses incurred for repairs made by Buyer except by prior written authorization Every claim on account of breach of warranty shall be made to SELLER in writing within the warranty period specified above otherwise such claim shall be deemed waived Seller shall have no warranty obligation whatsoever if its products have been subjected to alteration misuse negligence free chemicals in system corrosive at
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