Carrier 014-080 User's Manual
Contents
1. zx cc H i o o e dme 9 E 2 0 59 gt amp Dy amp 2058 29 C 59 e oy u gt 5 5 lt d 9 2 7 n I Im gt gt oO E Q 9 o o lt x i On 2 ig 8 E a c 1 tT LI 5 9 x o c T o N g 5 N LE cH 8 N 8 ie D tpe Hs EE ds 9 P 9 8 g 8 8 L 82. WEE Mak n 2 79 Pr 9154 1404 391AH3S 34155444 NOILONS 55 2 COMPRESSOR DISCHARGE PRESSURE SERVICE PORT PSIG COMPRESSOR DISCHARGE PRESSURE SERVICE PORT PSIG Fig 16 Heating Cycle Operation Check Chart R 22 50HO VQ027 Fig 13 Cooling Cycle Charging Chart R 22 0022
3. 8 8 cH 6 9 954 304 32335 34155353 NOILONS 0 5344 2 COMPRESSOR DISCHARGE PRESSURE SERVICE PORT PSIG COMPRESSOR DISCHARGE PRESSURE SERVICE PORT PSIG Fig 17 Cooling Cycle Charging Chart R 22 50HO VQ033 Fig 14 Heating Cycle Operation Check Chart R 22 0022
4. COMPRESSOR SUCTION PRESSURE SERVICE PORT PSIG COMPRESSOR DISCHARGE PRESSURE SERVICE PORT PSIG Fig 9 Cooling Cycle Charging Chart R 22 50HO VQ014 Hit Hg EE ie 9 8 B 9154 1303 32435 D 331 334 NOILONS NOSS3HdWNOO COMPRESSOR DISCHARGE PRESSURE SERVICE PORT PSIG COMPRESSOR DISCHARGE PRESSURE SERVICE PORT PSIG F Check Chart R 22 50HO VQ018 15 Cooling Cycle Charging Chart R 22 50HO VQ027 Fig 12 Heating Cycle Operation ig
5. PRODUCTION OIL COMPRESSOR 014 AJ5513F 24 018 AB5519F 32 022 MD2023FE 42 027 MD2423FE 42 o33 208 230 1 MD3423FE 42 042 MD4023FE 42 048 PC4616AD 72 060 6416 72 033 MF3423FE 42 042 MF4023FE 42 048 208 230 3 PY4616AD 72 060 PY6416AF 72 PY7716AF 72 MH3423FE 42 MH4023FE 42 460 3 PH4616AD 72 PH6416AF 72 080 72 PH7716AF neers Compressor Removal See Table 6 for compressor information and Fig 7 for component location Follow safety codes and wear safety glasses and work gloves Have quenching cloth available step 7 1 Shut off power to unit Failure to do so may result in electrical shock Remove unit com pressor section access panels Fig 1 and 5 2 Remove refrigerant from unit using refrigerant removal methods described in Carrier Standard Service Techniques Manual Chapter 1 3 Remove core from suction and discharge line Schrader valves 4 Disconnect compressor wiring at compressor terminal box 5 Using a tubing cutter cut suction and dis charge lines at convenient place near com pressor for easy reassembly to new compressor 6 Remove compressor holddown bolts and lift compressor out 7 Carefully unbraze suction and discharge line piping stubs from compressor If oil vapor in piping stubs ignites use quenching cloth 8 Braze piping stubs removed in step 7 on new compressor 9 Clean system
6. D CONDENSER HEATING CYCLE Fig 8 Refrigerant and Water Flow Diagrams VO UNIT _ R 22 CHG Ib oz Refrig Control _ FAN _ 042 _ 048 2 14 4 3 Capillary Tube Centrifugal Direct Drive Diameter in Nom 10 10 10 10 10 11 10 10 12 Width in Nom 7 7 7 7 7 7 8 10 9 Range Cfm 400 600 500 700 600 800 750 1000 950 1200 1225 1575 1400 1800 1750 2250 2300 3000 Motor Hp 1 8 1 8 1 6 1 6 1 4 1 3 1 2 3 4 1 Motor Rpm 3 speed 1075 Nominal 1990 HEAT EXCHANGER WATER FLOW RATE Gpm Factory refrigerant charge COOLING CYCLE CHARGING CHART o METHOD 1 Operate unit a minimum of 10 minutes before checking charge and after each charge Wo adjustment E ooi 2 Measure suction pressure by attaching a gage to unit suction service port Schrader Fitting gol 3 Measure discharge pressure by attaching a gage A i to unit discharge service port Schrader Fitting 4 Using sling psychrometer measure wet bulb E
7. FPT WATER RETURN OUTLET CONN WATER FPT WATER INLET CONN CONDENSATE DRAIN SUPPLY WATER 3 MIN m aiti SONDENSATE TRAP SECONDARY CONDENSATE CONDENSATE 3 MIN SPACE REQUIRED gt gt CONDENSATE DRAIN DRAIN CONN FPT FOR SERVICE 7 i BOTTOM OF UNIT lt SECONDARY 50HQ014 018 022 027 033 042 NX 2 E t CONDENSATE p OF UNIT wo BALANCING VALVES 50HQ 048 060 080 2 WITH Cc l SHUTOFF Supply Air Return Air gt Fig 5 Water Piping 5 2 Splice yellow and black power leads from control box to yellow and red motor leads Yellow to yellow and black to red CONNECT CONTROL POWER WIRING 24 v Power leads are brought thru 1 2 in hole pro vided in unit Fig 1 and 2 Extend leads to control wiring terminal board located on top of control box Fig 7 Connect leads to terminal board as shown in Fig 6 Use Carrier specified room thermostat and sub base for proper unit operation Be sure that field installed jumper wire is connected between subbase terminals W and Y Set thermostat heat anticipator at 1 0 amp for 1 units and 0 50 amp for 3 phase units R CONN TO SONN TO DISCONNECT GROUND pg UND DISCONNECT PER NEC LE LUG PER NEC GROUND _ GROUND 50HQ VQ HEAT PUMP CONTROL BOX PHASE 3 P
8. 10 Install new compressor in unit Braze suction and discharge lines to compressor piping stubs at points where cut step 5 using field supplied copper couplings Ensure compressor holddown bolts are in place Connect wiring 11 Evacuate and recharge unit Lubrication COMPRESSOR contains factory oil charge Re place oil when lost See Table 6 for oil recharge If necessary refer to Carrier Standard Service Tech niques Manual Chapter pages 1 21 for oil recharging procedure Use Carrier PP33 1 Texaco Capella B or Suniso 3G oil FAN MOTOR BEARINGS are prelubricated for 3 years heavy duty or 5 years normal duty service Cleaning Coil and Condensate Pan Clean and inspect coil condensate pan and drain before each cooling season 1 Remove coil section access panels and slide air filter out of filter flanges 2 Disconnect condensate drain line at pan drain connection 3 Use vacuum cleaner nozzle to clean the face of coil 4 Clean condensate drain trap with a bottle brush Clean condensate pan 5 Hold pail under condensate pan drain connec tion and flush pan out with clean water Ensure water flows freely thru condensate drain Do not overflow pan 6 Reconnect condensate drain line 7 Install access panel and air filter Indoor Fan Wheel should be centered in housing To adjust fan loosen setscrew holding fan to motor shaft Adjust fan and retighten setscrew 50VQ INDOOR BLOWER ASSEMBLY RE
9. R 8 6 959 1403 380553544 NOILOnS 405 9589 1304 3435 3YNSS3Yd NOILONS NOSS3HdWOO 9159 1304 3 34155384 NOILONS MOSS3HdNOO 5 5 co a g 9 EO 8 50 P 8 gt ul N Qo 5 89 z 2 5 I a OS o og 2 59 2 8 o 4 N 1 9 Oo lt gc lt E I _ 8 8A 8 o aa 5 8 5 ETE gt 2 g 8 2 8 8 9154 1304 391AH3S 340SS3Hd NOI
10. temperature of air entering unit 2 60 a 5 Refer to correct Charging Chart Locate on curves where unit discharge pressure line go inn TH indoor air wet bulb temperature line intersect 5 so 2008 6 From intersect point project horizontally left to COMPRESSOR DISCHARGE PRESSURE SERVICE PORT PSIG chart suction pressure line Compare chart suction pressure to unit suction pressure step 2 Fig 10 Heating Cycle Operation 7 unit suction pressure is lower than chart pres Check Chart R 22 50HO VQ014 sure add refrigerant to unit until chart pressure is reached If unit suction pressure is higher than chart pressure remove refrigerant until chart pressure is reached COMPRESSOR SUCTION PRESSURE SERVICE PORT PSIG COMPRESSOR DISCHARGE PRESSURE SERVICE PORT PSIG Fig 11 Cooling Cycle Charging Chart R 22 50HO VQ018
11. Resetthe thermostat to OFF After few minutes turn to COOL If the com pressor runs unit was off on high pressure See Problems for E i possible causes If the unit still fails to run check for faulty pressure switch by 1 jumpering the high pressure control Defective capacitor Check capacitor yr or Start Thermistor PTC If defective remove replace and revise correctly Seized compressor Try a start capacitor in parallel w with the run capacitor momentarily If the compressor starts but the problem reoccurs on starting install an auxiliary start kit The hard start kit is comprised of a recommended start relay and correctly sized capacitor If the compressor still does not start replace the compressor seen am Compressor overload open p In all cases an externa or internal temperature e sensitive com pressor overload is used If the compressor dome is too hot to touch the overload will not reset until the compressor cools down the compressor is cool and the overload does not reset there may be a defective or open overload If the overload is external replace the the overload otherwise replace the compressor i Compressor motor grou nded Internal wir winding grounded to the compressor shell Replace the compressor P jO P M Compressor windings open Check continuity of the compressor windings with
12. an ohmmeter If the windings are open replace the compressor The unit could be off on the LWTC Reset the thermostat to After few minutes turn to HEAT If the compressor runs unit was off on LWTC see Problems for possible causes 2 Low water temperature cutout open LWTC treo MEE Water temperature too low Lack of or inadequate water flow PS RESTORAN DM AE RSPR NMOS SCARE SVS LOE EAE AONE NEE UNIT OFF ON LOW WATER TEMPERA on heating j cntenng water too cold TURE CONTROL uM Scaled or plugged heat exchanger 2 Low water temperature _ Check for defective or improperly calibrated low water temperature switch switch UNIT SHORT E Wiring and controls Loose connections in the wiring orthe control contactors defective CYCLES Compressor overload Defective compressor overload check and replace if necessary If i the compressor runs too hot it may be due to the deficient refrig i erant charge OQoo M A M 13 TROUBLESHOOTING CHART cont PROBLEM _ CAUSE 1 CORRECTION 1 1 1 11 1 1 _ INSUFFICIENT Unit undersized Recalculate heat gains or losses for space to be conditioned If COOLING OR Er excessive rectify by adding insulation 1 shading etc mu m HEATING Loss
13. of conditioned air by 1 Check for leaks ductwork or introduction of ambient air thru leaks doors and windows Thermostat Improperly located thermostat 9 near kitchen sensing in accurately tl the comfort level in living areas Airflow Lack of adequate airflow or improper distribution of air MANN Refrigerant charge 0 __ Low refrigerant charge cau causing inefficient operation _ Compressor T B Check for defective compressor If discharge pressure is too low i and suction pressure is too high compressor is not pumping properly Replace compressor LEO Replace compressor 00000 Reversing valve Defective reversing valve creating bypass of refrigerant f from dis suction side of compressor i Operating pressure operating pressure See chart Refrigerant system Check strainer and capillary tubes for possible restrictions to flow of refrigerant 1 D mm The refrigerant system may be contaminated with moisture non condensables and particles oves mc beme aoaea csie M De Dehydrate evacuate and recharge the system cM ane we ceo cu xe get eq mp uasa Compressor Make sure the compressor is not in direct contact with the base or sides of the cabinet The holddown bolts used for
14. shipping should be loosened so that the compressor is floating free on its isolator mounts Excessive noise will occur if the compressor has a broken valve or loose discharge tube Replace the compressor Blower and blower motor Blower wheel hitting the casing Adjust for clearance and align ment Bent blower check and replace if damaged Loose blower wheel on shaft Check and tighten Defective bearings check and replace gt severe tnt X E Contactors A clattering or humming noise in the contactor could be due to control voltage less than 18 volts Check for low supply voltage low 1 transformer output or extra long runs of thermostat wires If the contactor contacts or coil is defective repair or replace NCR ORC RATES RAE So HOARSE etn cm Rattles and vibrations La eee aa NETO 4 Check for loose gt Screws panels or internal components Tighten and secure Copper piping could be hitting the metal surfaces Carefully readjust by bending slightly oe Airborne noises and Undersized ductwork will cause high airflow velocities and noisy other sounds operation Excessive water thru the water cooled heat exchan nger willcausea rattling sound _ 22 Throttle back on the water flow ensuring a
15. HASE Fig 6 Line Power Connections START UP Water Flow and Temperature Data 1 Consider design water flow rates for efficient operation See Table 4 for permissible water flow range 2 Ensure that water temperature entering unit is between 60 minimum and 90 F maximum If water temperature below 60F must be used insulate supply line and install a secondary drain pan under the unit to remove condensate from heat ang Plumbing 3 Ensure that supply water is clean and air 15 purged from system Air in supply water causes scaling in heat exchanger Foreign material in water and or excessive velocity of water can cause damage to tubing To Start Unit Ensure that air filter is in place on unit filter flanges provided Do not operate unit without filter in place Adjust the thermostat as follows 1 Set selector switch at OFF 2 Turn on main disconnect switch to unit INDOOR CAPILLARY CONTROL SUCTION COIL TUBE FAN SP SELECTOR BLOCK MOLEX PLUG HEAT COMPRESSOR EXCHANGER Fig 7 Typical Component Arrangement 014 042 Shown 3 Set fan switch as desired ON or AUTO 4 Set thermostat dial at desired temperature 5 Set selector switch at HEAT or COOL Check system refrigerant charge See Service Refrigerant Charging on page 7 Unit Single Phase Compressors Equipped With a Compressor Start Thermistor PTC De vice When supply voltage is within limits indi cat
16. LONS HOSS3HdWOO 5153 1804 391AH3S D 3H60SS344 NOLLOnS 305535309 954 404 39435 9 34nsS34d NOLLOnS HOSS3HdWOO Fig 23 Cooling Cycle Charging Chart R 22 50HO VQ080 10 Fig 20 Heating Cycle Operation Check Chart R 22 0042 CHARGEMASTER DEVICE OPERATION Operate unit 10 minutes before using Charge master Ensure unit indoor fan section access panel is in place for proper Chargemaster operation l Tape Chargemaster feeler bulb to unit suction line Insulate bulb Ensure suction line is clean for good contact with bulb 2 Connect refrigerant drum to Chargemaster inlet port with drum in position for vapor charging 3 Connect Chargemaster outlet port loosely to unit suction line Schrader valve 4 Crack valves on refrigerant drum and Charge master to purge lines from drum to suction line Schrader valve After purging lines close valve on Chargemaster only Tighten Chargemaster connection at suction line Schrader valve 5 Measure unit leaving water temperature 6 Read evaporator temperature at red needle position on Chargemaster temperature gage and suction line temperature at black needle position 7 Enter 50HO VQ Charging Chart Table 5 at unit leaving water temperature step 5 and evaporator temperature step 6 Do not use standard charging chart on cover of Charge master Find the suction line temperature required for correct system charge If actu
17. MOVAL 1 Remove fan section access panel 2 Remove power wires from Molex plug 3 Place a spacer beneath blower housing for support 4 Remove blower assembly mounting bracket Rear flange on top of blower housing and screws now hold blower assembly in place 5 Support blower housing at bottom and remove spacer Tilt blower assembly downward and lift out of unit 50HQ INDOOR BLOWER ASSEMBLY REMOVAL 1 Remove top cover Fig 2 2 Remove power wires from Molex connector Fig 7 3 Remove blower assembly mounting screws from base unit Fig 2 4 Lift blower assembly out of unit Indoor Fan and Motor Removal l Remove blower assembly from unit 2 Remove Molex plug from bracket on fan housing 3 Loosen setscrew holding fan to motor shaft 4 Loosen motor mounting band and remove motor 5 Remove fan cutoff plate from blower housing outlet 6 Remove fan wheel from blower housing outlet Clean Indoor Fan Wheel When coil is cleaned remove caked on dirt from fan wheel and housing with brush remove grease with mild solvent When replacing blower assembly make sure fan wheel is centered in housing Return Air Filter Replace filter media 4 times a year For other types of filters refer to filter manu facturer s instructions as required Heat Exchanger If excessive discharge pressure is experienced with normal water flow the heat exchanger tubes may be fouled and require cleaning Conta
18. Number Air Conditioning Maker 07 4 _ Single Package Water Source Heat Pumps INDEX Page Page SAFETY CONSIDERATIONS 1 MAKE CONDENSATE DRAIN INSTALLATION 1 5 LINE CONNECTION Step 1 Check Equipment and Step 4 Make Electrical Connections 4 Jobsite XM PRI e e eee ead 1 INSTALL A BRANCH CIRCUIT UNPACKAGE UNIT DISCONNECT PER NEC INSPECT EQUIPMENT BRING POWER LEADS INTO UNIT COMPLETE OR CONSIDER THESE CONNECT GROUND LEAD TO SYSTEM REQUIREMENTS GROUND LUG IN SPLICE BOX Step 2 Connect Supply Ductwork 2 e SET FAN MOTOR SPEED Step 3 Make Piping Connections 3 CONNECT CONTROL POWER WIRING CONNECT WATER SUPPLY AND RETURN LINES INSTALL BALANCING VALVES SAFETY CONSIDERATIONS Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electrical components Only trained and quali fied service personnel should install repair or service air conditioning equipment Untrained personnel can perform basic mainten ance functions of cleaning coils and cleaning and replacing filters All other operations should be performed by trained service personnel When working on air conditioning equipment observe precautions in the literature tags nd labels attached to the unit and other safety precautions that may apply Follow all safety codes Wear safety glasses ands work g
19. al suction line temperature step 6 is higher than table value the system is undercharged If suc tion line temperature is lower than table value the system 1s overcharged Example At leaving water temperature of 93F and evaporator temperature of 41 F the system is correctly charged at 50 F 2F suction line temperature Table 5 Chargemaster Charging Chart gt UNIT LEAVING EVAPORATOR TEMP F WATER 30 33 36 39 4 41 Suction Line Temp F Saturated evaporator temperature which is the equivalent tem perature of pressure taken at unit suction service valve 11 8 Add charge by slowly opening Chargemaster valve If necessary reduce charge by bleeding at liquid line Schrader valve Check outdoor air and evaporator temperature during procedure If they change refer back to Chargemaster Charging Chart for new value Correct use of Chargemaster ensures that an optimum refrigerant charge is in system when conditions and system components are normal However the Chargemaster does not solve or fix system abnormalities It indicates correct charge for condition of system It does not make correc tions for dirty filters slow fans or other abnormal conditions This charging device ensures that a correct relationship exists between leaving water temperature evaporator temperature and suction line temperature on a specific system gt Table 6 Compressor Data UNIT
20. allation TR ems gt Table 3 Electrical Data OPERATING MAXIMUM EMO UE V PH HZ VOLTAGE Ced 2 ELA FUSE LRA RLA AMPS a Sop 014 375 9 7 20 018 530 134 9 30 022 t 650 133 1 5 30 027 660 162 17 35 033 209 290 1 00 880 233 25 50 042 1000 277 32 60 048 940 239 34 60 060 1500 353 45 60 _ 033 870 13 8 25 30 042 1000 185 32 40 048 208 230 3 60 800 168 39 40 060 1360 206 45 45 080 1370 207 62 45 033 300 60 11 15 042 365 6 9 16 15 048 460 3 60 350 82 20 15 060 490 104 26 25 080 690 114 31 25 FLA Full Load Amps LRA Locked Rotor Amps RLA Rated Load Amps INSTALL BALANCING VALVES with shutoff in water supply and return lines for water flow adjustment and a means of water shutoff if neces sary when servicing unit When multiple units are connected in parallel valves permit removal of one unit without interrupting water flow to other units MAKE CONDENSATE DRAIN LINE CON NECTION to female pipe connection provided on unit Fig 4 and 5 Install a trap in condensate line as close as possible to unit Trap must be at least 3 in deep and not higher than the bottom of unit con densate drain opening Pitch condensate line to open drain or sump Insulate a condensate drain line located above a living area 50HQ Units Only If a secondary drain is re quired remove pla
21. ceable Media Size 17 x 23 37 x 23 Hauara CNY aR ma REMARRIED WATER 5 DIAM HOLE LOW DIAM HOLE HIGH OUTLET CONN VOLTAGE CONN VOLTAGE CONN E d EIS eil 0 SONR BO EN NN BLOWER ASSEMBLY CREED access 222 MOUNTING SCREWS 1 E PANEL f 0 WATER INLET CONN 0 3 MIN A ad n A SAE E NEN N RUE ou dne REQUIRED 7 5 A x FOR SERVICE e Bs CONDENSATE A cu DRAIN CONN 2 a 50HQOI4 042 E 3 A 50HQ048 060 080 oo Gey UA ee CONDENSATE a E d ge CONDENSATE DRAIN DRAIN CONN 8 DUCT lt CONN VOR BOTTOM OF UNIT CONN FLANGE Supply Air gt Return Air Fig 2 Dimensions and Connections 50HQ Step 3 Make Piping Connections CONNECT WATER SUPPLY AND RETURN THREADED POS BASE UNIT LINES to water inlet and outlet pipe connections shown in Fig 4 and 5 Use flexible hose for water line to reduce possible vibration and improve unit serviceability Make sure hoses or pipes are suitable for system water pressure and sized for proper How rate BOT water flow and yeinperatire data refer to Fig 3 Suspension Kit e Start page 6 Inst
22. ct a local water treatment firm for details on chemical cleaning gt TROUBLESHOOTING CHART SM GR unnum a PROBLEM CAUSE CORRECTION ENTIRE UNIT DOES Blown fuse Replace fuse or reset circuit breaker NOT RUN Broken or loose wires Replace or tighten the wires Voltage supply low if voltage i is below minimum voltage specified on dataplate contact _ local power company _ Transformer E Check 24 volt transformer for burnout or voltage less than 18 volts Thermostat 7 Set thermostat on COOL and lowest temperature setting unit 54 should run Set thermostat on HEAT and highest temperature setting unit should run Set fan to ON fan should run If unit does not run in all 3 cases the thermostat could be wired incorrectly 1 faulty To ensure faulty miswired thermostat disconnect E thermostat wires at unit and jumper between Y and W ter E minals and unit should run m BLOWER OPERATES Voltage supply low If voltage is below minimum voltage specified on the dataplate BUT COMPRESSOR contact local power company DOES NOT Thermostat Check setting calibration and wiring E Wiring Check for loose or broken wires at compressor capacitor or Hn oor TR One eee ae High pressure controls The unit could be off on the high pressure cutout control
23. dequate flow for good operation but eliminating the noise M Om For replacement items use Carrier Specified Parts Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Form 251 Supersedes 161 PrintedinU S 9 81 PC111 Catalog No 535 029 Tab
24. ed on nameplate and compressor will not start check the thermistor with an ohmmeter If the PTC is good and the compressor does not start disconnect the PTC from the starting circuit and give unit a temporary capacitance boost Refer to Carrier Standard Service Techniques Manual Chapter 2 for details on capacitance boost pro cedure If unit does not start with capacitance boost compressor may be defective If unit does start check starting capability with PTC assistance If questionable remove PTC add start capacitor and start 2 start kit installation instructions Unit Controls and Safety Devices HIGH PRESSURE RELIEF VALVE except 50HQ VQ014 is located in compressor Relief valve opens at a pressure differential of approximately 550 psi between suction low side and discharge high side to allow pressure equalization CURRENT AND TEMPERATURE SENSITIVE OVERLOAD linebreak Internal on all com pressors except on 50HQ VQ014 which has external shell mounted overload Overload resets auto matically when internal compressor motor tempera ture drops to a safe level overloads may require up to 45 minutes to reset When an internal overload is suspected of being open check by using an ohm o meter or continuity tester If necessary refer to Carrier Standard Service Techniques Manual Chapter 2 for complete instructions gt HIGH PRESSURE SWITCH closes and shuts compressor off if discharge p
25. edium or low speed operation as follows 1 Remove unit fan section access panel 2 Locate Molex fan speed selector block on fan housing Fig 7 Selector block receptacle 1 is high fan speed receptacle 2 is medium fan speed and receptacle 3 is low fan speed Yellow and black fan motor power leads from control box are connected to selector block receptacle C and 1 Yellow lead is common black lead is speed change lead To change fan motor speed remove black lead from selector block receptacle and plug it into desired receptacle Receptacle 4 is not used Set Fan Motor Speed on 460 Volt Units Two speed fan motor is factory wired for high speed oper ation Yellow and black power leads from control box are connected to the yellow and black fan motor leads Change fan motor to low speed by wiring as follows l Splice the violet and black fan motor leads together 1 BALANCING VALVES 2 WITH SHUTOFF CONDENSATE TRAP 50VQOI4 042 BALANCING VALVES Se WITH SHUTOFF a 50V 0048 060 080 SUPPLY RETURN WATER WATER RETURN WATER CONDENSATE DRAIN t SUPPLY WATER E Return Air gt Fig 4 Water Piping 50VQ BALANCING VALVES CONTROL BOX 2 WITH SHUTOFF 2 Low COMPR HEAT HOLE VOLTAGE EXCHANGER HIGH VOLTAGE CONN ACCESS PANEL FAN ACCESS EVAPORATOR COIL PANEL REAR SIDE
26. harging See Fig 8 for service port location Dial a charge charging cylinder is an accurate device used to recharge systems by weight These cylinders are available at refrigeration supply firms To check and or adjust refrigerant charge during cooling season use correct Cooling Cycle Charging gt Chart Fig 9 11 13 15 17 19 21 22 23 or Carrier Chargemaster charging device Carrier Part No 38GC680004 Charging charts or Chargemaster may also be used as alternate methods of recharging system Charging methods are described below To check system operation during heating cycle use correct Heating Cycle Operation Check Chart Fig 10 12 14 16 18 20 These charts indicate whether a correct relationship exists between unit operating pressures and water temperature leaving heat exchanger If pressure and water temperature lines do not intersect on chart the system refrigerant charge may not be correct or other system abnor malities may exist Do not use Operation Check Charts to adjust refrigerant charge Weigh charge into system COLD WATER OUT COAXIAL EA HEAT EXCHANGER CHILLER REVERSING VALVE DE ENERGIZED om COLD REN AIR BLOWER HOT SUPPLY AIR DISCHARGE SERVICE PORT SCHRADER FITTING SUCTION SERVICE PORT SCHRADER FITTING HOT GAS LIQUID REFRIGERANT
27. loves Use quenching cloth for brazing operations Have fire extinguishers available for all brazing operations INSTALLATION Step 1 Check Equipment and Jobsite UNPACKAGE UNIT Move to final location Carrier Corporation 1981 START UP rx SAISIR RUPES 6 SERVICE ho t bes REDE 7 INSPECT EQUIPMENT File claim with ship ping company if shipment is damaged orincomplete COMPLETE OR CONSIDER THESE SYSTEM REQUIREMENTS before installation a Consult local building codes and National Elec trical Code NEC for special installation requirements gt b Consider type of water source Ensure there is an adequate supply of water at temperature of 60 F to 90F with minimum pressure of 20 psig c Provide sufficient space for water piping con densate drain wiring and servicing unit See Fig Units installed in confined areas may have to be removed for major servicing such as compressor or fan motor replacement d Provide a minimum 6 in clearance between return air filter and adjacent wall e Mount unit on floor or solid platform The 50HQ units can be suspended from ceiling See f below To reduce sound transmission especially when unit is located in a closet or utility room having louvered doors the follow ing acoustical treatment is recommended place an isolation pad under unit Pad must be same size as unit base Construct a l in fiberglass sound shield in front of uni
28. ressure rises above 395 psig Switch opens at 295 psig FREEZE UP PROTECTION Two controls are used to prevent unit from operating if water approaches freezing temperature 1 Low water temperature cutout LWTC shuts unit off and energizes lockout relay if water temperature reaches 37 F 2 Lockout relay locks itself in energized position and prevents unit from starting The unit can be restored to heating operation if the water temperature rises to 42F where the LWTC will reset and if the thermostat circuit 1s interrupted either by lowering the thermostat setting or by moving system switch to OFF or COOL Thermostat may then be readjusted to normal set point HEAT PUMP CIRCUITS shown in Fig 8 are refrigerant and water flow diagrams for heating and cooling cycles SERVICE Refrigerant Charging Unit refrigerant system is factory charged When recharging is necessary FORAL HOT GAS E EXCHANGER REVERSING VALVE CONDENSER ENERGIZED LIQUID DISCHARGE SERMCE PORT SCHRADER FITTING CAPILLARY TUBE BLOWER lt COOL SUPPLY AIR COOLING CYCLE during heating or cooling season weigh in total charge indicated in Table 4 Remove any refrigerant remaining in system before recharging If system has lost complete charge evacuate system to 500 microns 29 7 in vacuum before recharging Service port connections are provided on high and low sides of refrigerant system for evacuation and c
29. stic cap from secondary drain connection located in bottom of unit and connect drain so that discharge is obvious to maintenance personnel Step 4 Make Electrical Connections Field wiring must comply with local and national fire safety and electrical codes Voltage to unit must be within the operating voltage range indicated on nameplate or in Table 3 On 3 phase units phases must be balanced within 2 Operation of unit on improper line voltage or with excessive phase imbalance constitutes abuse and is not covered by Carrier Warranty INSTALL A BRANCH CIRCUIT DISCONNECT PER NEC of adequate size to handle unit starting current Locate disconnect within sight of and readily accessible from the unit per Section 440 14 of National Electrical Code NEC BRING POWER LEADS INTO UNIT Extend leads from disconnect per NEC thru hole provided Fig 1 and 2 into line wiring splice box Fig 6 CONNECT GROUND LEAD TO GROUND LUG IN SPLICE BOX for safety Connect power wiring See Fig 6 Splice line power leads to yellow and black pigtails on single phase units or yellow pigtails on 3 phase units Use wire nuts Tape each connection Unit transformer on 208 230 volt units is factory wired for 230 24 volt operation For 208 24 volt operation remove black 230 v transformer lead from unit contactor and connect red 208 v lead to contactor Cap unused transformer lead SET FAN MOTOR SPEED Set fan motor for high m
30. t Form 25 f 50 units include a suspension package for ceiling installation To attach hanging brackets install 4 bolts 5 16 18 3 8 in 1g thru bracket into the 4 weld nuts located on bottom of unit Insert the threaded rod thru rubber grommet located in hanging bracket and attach with flat washer and double nut See Fig 3 Step 2 Connect Supply Ductwork Supply air duct flange is shipped inside unit Remove flange from shipping location and install on unit supply air opening Connect supply air ductwork to unit supply air duct connection flange Refer to Fig 1 and 2 and Table 1 and 2 for connection size and location If necessary refer to Carrier System Design Manual Part 2 for system air duct design Table 1 Installation Data 5 See Fig 1 018 022 027 033 oa2 WT ib 260 270 290 277732 DIMENSIONS ft in A 1 9 3 16 B 1 9 3 16 3 2 5 16 D 0 5 7 8 E 0 1 3 16 SUPPLY DUCT CONN UT ft in F 0 9 7 16 G 1 1 3 8 RE EE Size in 21 21 DUCT CONN ANGE CONDENSATE i DRAIN CONN FPT INDOOR COIL DIAM HOLE CONN 3 FPT WATER 1 DIAM HOLE OUTLET CONN HIGH VOLTAGE CONN WATER INLET CONN 3 MIN SPACE REQUIRED FOR SERVICE 50 0014 042 E Supply Air LOW VOLTAGE When designing and installing ductwork consider
31. tfie following a Size duct for 350 to 450 cfm per ton of cooling capacity Avoid abrupt duct size increases and reductions Use flexible connectors between ductwork and unit to prevent transmission of vibration Ducts passing thru an unconditioned space must be insulated and covered with vapor barrier in accordance with the latest issue of SMACNA Sheet Metal and Air Conditioning Contractor s National Association and NESCA National Environmental Systems Contractor s Associa tion minimum installation standards for resi dential heating and air conditioning systems b PS 0 6 13 16 1 4 0 10 1 2 1 1 1 16 1 0 Replaceable Media 38 22 i DIAM HOLE LOW VOLTAGE CONN 5 DIAM HOLE HIGH VOLTAGE CONN WATER OUTLET CONN WATER CONN i FPT CONDENSATE DRAIN CONN SPACE REQ D FOR SERVICE 5 048 080 E Return Air Fig 1 Dimensions and Connections 50VQ 2 Table 7 Installation Data See Fig 2 MODEL 50HQ 014 018 2 027 033 _ OPER WT 6 1 220 195 _ 220 _ 230 DIMENSIONS ft in A 3 10 1 2 4 0 1 10 5 16 1 11 1 5 15 16 2 0 D 0 3 7 8 0 3 7 8 0 2 9 16 0 3 1 16 033 18 2 SUPPLY DUCT CONN ft in F 1 1 3 8 1 7 7 8 S est d RO NS 2030472 1343 76 _ ACCESSORY FILTER 1 Repla
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