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Carrier AQUAZONE 50PSH, Installation, Start-Up And Service Instructions Manual

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Carrier AQUAZONE 50PSH Installation, Start-Up And Service Instructions Manual Download Page 11

11

Fig. 10 — 

Typical Ground-Water Piping Installation

Boiler
Drains
(field-installed)

Strainer (field-installed accessory)
(16 to 20 mesh recommended for
filter sediment)

Shut-Off
Valve (field-installed accessory)

Water
Control
Valve
(field-installed
accessory)

Flow
Regulator
(field-installed
accessory)

Pressure

Tank

Water Out

Water In
From Pump

A50-7733

Summary of Contents for AQUAZONE 50PSH

Page 1: ...IDE ECONOMIZER ETO BOILERLESS HEAT CONTROL DELUXE D ONLY PRE START UP 42 System Checkout 42 CLEAN AIR COIL Set Blower Motor Speed 42 PERMANENT SPLIT CAPACITOR PSC MOTOR CONSTANT TORQUE ECM MOTOR CONSTANT AIRFLOW ECM MOTOR System Flushing and Filling 45 System Flow 45 FLOW VERIFICATION FLOW REGULATION ANTIFREEZE FREEZE PROTECTION SELECTION START UP 46 Operating Limits 46 ENVIRONMENT POWER SUPPLY UN...

Page 2: ...ersonal injury or property damage Consult a qualified installer service agency or your distributor or branch for information or assistance The qualified installer or agency must use factory authorized kits or accessories when servicing or repairing this product Refer to the individual instructions packaged with the kits or accessories when installing Follow all safety codes Wear safety glasses and...

Page 3: ...intenance instructions are provided with each unit Before unit start up read all manuals and become familiar with the unit and its operation Thoroughly check out the system before operation Complete the inspections and instruc tions listed below to prepare a unit for installation See Table 1 for unit physical data HORIZONTAL UNIT 50PSH Horizontal units are designed for indoor installation only Be ...

Page 4: ...n 15 x 20 15 x 20 18 x 20 18 x 20 18 x 20 20 x 30 Operating Weight lb 165 172 173 190 198 307 Shipping Weight lb 185 192 205 218 222 340 030 070 50PS UNIT SIZE 030 036 042 048 060 070 Compressor Type Scroll Maximum Water Working Pressure psig 400a Standard Fan Motor and Blower Fan Motor Type ECM Constant Torque Fan Motor hp 1 2 3 4 3 4 3 4 1 1 Blower Wheel Size Diameter x Width in 9 x 7 9 x 7 10 x...

Page 5: ... WATER CONNECTIONS RECOMMENDED REPLACEMENT NOMINAL FILTER SIZE WIDTH DEPTH HEIGHT CAB END TO FILTER RACK R A DUCT WIDTH CAB FRONT TO FILTER RACK WATER IN WATER OUT SIDE TO DISC DISC WIDTH TOP TO DISC DISC HEIGHT END TO DISC TOP TO DISC 007 21 75 43 25 16 75 0 50 20 25 22 25 2 25 13 87 3 50 11 75 4 62 7 75 3 50 4 62 15 00 13 00 3 4 FPT 15 x 20 x 1 009 21 75 43 25 16 75 0 50 20 25 22 25 2 25 13 87 3...

Page 6: ... DUCT WIDTH R A DUCT FLANGE HEIGHT FILTER RACK HEIGHT RIGHT SIDE TO DISC 007 21 75 21 75 32 75 11 75 7 75 5 00 8 50 2 25 8 00 13 75 18 00 13 00 15 00 5 32 3 4 FPT 15 x 20 x 1 009 21 75 21 75 32 75 11 75 7 75 5 00 8 50 2 25 8 00 13 75 18 00 13 00 15 00 5 32 3 4 FPT 15 x 20 x 1 012 21 75 21 75 32 75 11 75 7 75 5 00 8 50 2 62 7 50 12 50 18 00 16 00 18 00 5 32 3 4 FPT 18 x 20 x 1 015 21 75 21 75 39 25...

Page 7: ...r pressure 7 Inspect the blower assembly Verify that the blower has not come lose during shipping Verify clearance between the blower wheel and the blower housing Verify free blower rotation 8 Inspect all electrical connections Be sure connections are clean and tight at the terminals 9 Check unit controls If Complete C or Deluxe D verify field provided thermostat is available If WSHP Open verify p...

Page 8: ...closet ensure that the service panel screws are accessible that the filter can be replaced without damage and that water and electrical connections are accessible For models with a unit mounted disconnect switch make sure the switch can be easily seen and operated To reduce sound transmission units should be installed using flex ible electrical conduit and hose kits Care should be taken to en sure...

Page 9: ...for existing leaks and re pair as necessary to ensure a tight air seal within the duct The duct system and all diffusers should be sized to handle the designed air flow quietly To maximize sound attenuation of the unit blower the supply and return air plenums should be insulated There should be no direct straight air path through the return air grille into the heat pump The return air inlet to the...

Page 10: ...mmon loop maintained at 50 to 100 F The use of a closed circuit evapora tive cooling tower with a secondary heat exchange between the tower and the water loop is recommended If an open type cool ing tower is used continuously chemical treatment and filtering will be necessary In addition to complying with any applicable codes consider the following for system piping Piping systems using water temp...

Page 11: ... installed Strainer field installed accessory 16 to 20 mesh recommended for filter sediment Shut Off Valve field installed accessory Water Control Valve field installed accessory Flow Regulator field installed accessory Pressure Tank Water Out Water In From Pump A50 7733 ...

Page 12: ...tion with a few drops of one Molar zinc acetate solution allowing accurate sulfide determination up to 24 hours after sampling A low pH and high alkalinity can cause system problems even when both values are within ranges shown The term pH refers to the acidity basicity or neutrality of the water supply Below 7 0 the water is considered to be acidic Above 7 0 water is considered to be basic Neutra...

Page 13: ... them regularly to avoid sys tem failure and reduced service life See Fig 11 Fig 11 Supply Return Hose Kit AQUASTAT BULB INSTALLATION Units with Complete C or Deluxe D controls and waterside econo mizer or units with Boilerless Heat Control all Deluxe D include an aquastat with remote sensing bulb that must be field installed on the incoming water piping The remote sensing bulb must be installed o...

Page 14: ... Electric Code as well as all applicable local codes Refer to the unit electri cal data on the unit nameplate for wire and branch circuit protec tion sizing Supply power voltage and phasing should match the required voltage and phasing shown on the unit nameplate Oper ating the unit below the minimum voltage above the maximum voltage or with incorrect phasing can result in poor system perfor mance...

Page 15: ... BREAK 120 SECOND LOW PRESSURE BYPASS 5 TEST DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES MUST BE SET TO NO FOR NORMAL OPERATION 6 FREEZE SENSOR ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS 7 ALARM OUTPUT DIP SWITCH MUST BE SET TO...

Page 16: ...D LOW PRESSURE BYPASS 6 TEST DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES MUST BE SET TO NO FOR NORMAL OPERATION 7 FREEZE SENSOR ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS 8 ALARM OUTPUT DIP SWITCH MUST BE SET TO PULSE IF BLINKI...

Page 17: ...17 Fig 15 PSC Motor Single Phase Single Stage WSHP Open Control ...

Page 18: ...K 120 SECOND LOW PRESSURE BYPASS 5 TEST DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES MUST BE SET TO NO FOR NORMAL OPERATION 6 FREEZE SENSOR ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS 7 ALARM OUTPUT DIP SWITCH MUST BE SET TO PULS...

Page 19: ...PRESSURE BYPASS 6 TEST DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES MUST BE SET TO NO FOR NORMAL OPERATION 7 FREEZE SENSOR ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS 8 ALARM OUTPUT DIP SWITCH MUST BE SET TO PULSE IF BLINKING T S...

Page 20: ...20 Fig 18 Constant Torque Motor Single Phase Single Stage WSHP Open Control ...

Page 21: ...300 SECOND RANDOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS 5 TEST DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES MUST BE SET TO NO FOR NORMAL OPERATION 6 FREEZE SENSOR ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINA...

Page 22: ...DOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS 6 TEST DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES MUST BE SET TO NO FOR NORMAL OPERATION 7 FREEZE SENSOR ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS 8 ALARM OUT...

Page 23: ...23 Fig 21 Constant Airflow Single Phase WSHP Open ...

Page 24: ...E SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS 7 ALARM OUTPUT DIP SWITCH MUST BE SET TO PULSE IF BLINKING T STAT SERVICE LIGHT IS DESIRED 8 DEFAULT SETTINGS FOR UPM BOARD FROM FACTORY SHOWN 9 ALARM OUTPUT IS NORMALLY OPEN NO DRY CONTACT IF 24 VAC IS NEEDED CONNECT R TO ALR COM TERMINAL 24 VAC WILL BE SENSED ON THE ALR OUT WHEN THE UNIT IS IN A...

Page 25: ...OR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS 8 ALARM OUTPUT DIP SWITCH MUST BE SET TO PULSE IF BLINKING T STAT SERVICE LIGHT IS DESIRED 9 DEFAULT SETTINGS FOR UPM BOARD FROM FACTORY SHOWN 10 ALARM OUTPUT IS NORMALLY OPEN NO DRY CONTACT IF 24 VAC IS NEEDED CONNECT R TO ALR COM TERMINAL 24 VAC WILL BE SENSED ON THE ALR OUT WHEN THE UNIT IS IN ALARM ...

Page 26: ...26 Fig 24 PSC Motor Three Phase Single Stage WSHP Open ...

Page 27: ...WILL OPERATE AT 26 F BY DEFAULT IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS 7 ALARM OUTPUT DIP SWITCH MUST BE SET TO PULSE IF BLINKING T STAT SERVICE LIGHT IS DESIRED 8 DEFAULT SETTINGS FOR UPM BOARD FROM FACTORY SHOWN 9 ALARM OUTPUT IS NORMALLY OPEN NO DRY CONTACT IF 24 VAC IS NE...

Page 28: ...PERATE AT 26 F BY DEFAULT IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS 8 ALARM OUTPUT DIP SWITCH MUST BE SET TO PULSE IF BLINKING T STAT SERVICE LIGHT IS DESIRED 9 DEFAULT SETTINGS FOR UPM BOARD FROM FACTORY SHOWN 10 ALARM OUTPUT IS NORMALLY OPEN NO DRY CONTACT IF 24 VAC IS NEEDED ...

Page 29: ...29 Fig 27 Constant Torque Motor Three Phase Single Stage WSHP Open ...

Page 30: ...R NORMAL OPERATION 6 FREEZE SENSOR ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS 7 ALARM OUTPUT DIP SWITCH MUST BE SET TO PULSE IF BLINKING T STAT SERVICE LIGHT IS DESIRED 8 DEFAULT SETTINGS FOR UPM BOARD FROM FACTORY SHOWN 9 ALARM OUTPUT...

Page 31: ...H MUST BE SET TO PULSE IF BLINKING T STAT SERVICE LIGHT IS DESIRED 8 DEFAULT SETTINGS FOR UPM BOARD FROM FACTORY SHOWN 9 ALARM OUTPUT IS NORMALLY OPEN NO DRY CONTACT IF 24 VAC IS NEEDED CONNECT R TO ALR COM TERMINAL 24 VAC WILL BE SENSED ON THE ALR OUT WHEN THE UNIT IS IN ALARM CONDITION OUTPUT WILL BE PULSED IF PULSE IS SELECTED 10 TERMINAL BLOCK TB3 LOCATED INSIDE DISCONNECT SWITCH BOX 11 CHECK ...

Page 32: ...32 Fig 30 Constant Airflow Motor Three Phase Single Stage WSHP Open ...

Page 33: ...WTS LEAVING WATER TEMP SENSOR OPTIONAL WIRING J1 9 USED TO CONNECT FIRE ALARM RELAY OR PHASE MONITOR OPTIONS 1 2 2 FACTORY JUMPER IS INSTALLED ON J5 5 AND J5 6 IF CONDENSATE FLOAT SWITCH NC IS NOT PRESENT 3 3 FOR 2 STAGE UNITS CONNECT CMR CONN ACROSS PINS 4 AND 6 OF CMR1 WITH SIGNAL CMR 4 GOING TO PIN 4 AND SIGNAL CMR 2 GOING TO PIN 6 ...

Page 34: ...Temp Limit Switch HT1 Heater Element 1 HR1 Heater Contactor 1 OPTIONAL COMPONENTS LEGEND F1 4 Fuses 1 4 HR2 Heater Contactor 2 HT2 4 Heater Element 2 4 TB1 Power Terminal Block NOTES 1 See unit name plate for electrical rating 2 All field wiring must be in accordance with NEC NFPA 70 Use copper conductors only Conduc teurs en cuivre seulement 3 208 230 v units are factory wired for 230 v operation...

Page 35: ... 60 1 7 1 55 4 1 2 80 0 33 11 7 15 460 3 60 1 3 5 28 0 1 2 10 0 50 6 5 15 030 208 230 1 60 1 12 8 58 3 1 4 10 0 50 20 1 30 265 1 60 1 9 6 54 0 1 3 60 0 50 15 6 25 208 230 3 60 1 7 7 55 4 1 2 80 0 50 13 7 20 460 3 60 1 3 6 28 0 1 2 10 0 50 6 6 15 036 208 230 1 60 1 16 0 77 0 1 6 00 0 75 26 0 40 208 230 3 60 1 10 0 71 0 1 6 00 0 75 18 5 25 460 3 60 1 4 7 38 0 1 4 60 0 75 9 1 15 042 208 230 1 60 1 16...

Page 36: ... 208 230 1 60 1 12 8 58 3 1 2 8 0 33 18 8 30 265 1 60 1 9 6 54 0 1 2 6 0 33 14 6 20 208 230 3 60 1 7 7 55 4 1 2 8 0 33 12 4 20 460 3 60b 1 3 6 28 0 1 2 6 0 33 7 1 15 036 208 230 1 60 1 16 0 77 0 1 4 3 0 50 24 3 40 208 230 3 60 1 10 0 71 0 1 4 3 0 50 16 8 25 460 3 60b 1 4 7 38 0 1 4 1 0 50 10 0 15 042 208 230 1 60 1 15 4 83 9 1 6 8 0 75 26 1 40 208 230 3 60 1 10 4 73 0 1 6 8 0 75 19 8 30 460 3 60b ...

Page 37: ...9 6 1 9 600 7 200 40 0 34 6 2 8 53 5 46 8 60 50 030 4 8 1 4 800 3 600 20 0 17 3 4 1 30 1 26 8 35 30 9 6 1 9 600 7 200 40 0 34 6 4 1 55 1 48 4 60 50 036 4 8 1 4 800 3 600 20 0 17 3 6 0 32 5 29 1 35 30 9 6 1 9 600 7 200 40 0 34 6 6 0 57 5 50 8 60 60 14 4 2 14 400 10 800 60 0 51 9 6 0 F1 F2 82 5 72 4 90 80 F3 F4 042 4 8 1 4 800 3 600 20 0 17 3 6 0 32 5 29 1 35 30 9 6 1 9 600 7 200 40 0 34 6 6 0 57 5 ...

Page 38: ...0 7 200 40 0 34 6 4 3 55 4 48 6 60 50 14 4 2 14 000 10 800 60 0 51 9 4 3 F1 F2 80 4 70 3 90 80 F3 F4 042 4 8 1 4 800 3 600 20 0 17 3 6 8 33 5 30 1 35 35 9 6 1 9 600 7 200 40 0 34 6 6 8 58 5 51 8 60 60 14 4 2 14 400 10 800 60 0 51 9 6 8 F1 F2 83 5 73 4 90 80 F3 F4 048 4 8 1 4 800 3 600 20 0 17 3 6 8 33 5 30 1 35 35 9 6 1 9 600 7 200 40 0 34 6 6 8 58 5 51 8 60 60 14 4 2 14 400 10 800 60 0 51 9 6 8 F...

Page 39: ... SENSORS Thermostats or DDC space sensors should be located on an interi or wall away from supply ducts Avoid locations subject to direct sunlight or drafts or external walls Thermostat wiring should be 18 AWG American Wire Gage Refer to the installation instruc tions for the thermostat for further details HOT GAS REHEAT CONTROL Units with hot gas reheat HGRH will include an additional H terminal ...

Page 40: ... the transformer should be considered when applying low voltage ac cessories such as shut off valves thermostats or DDC controls Table 9 shows the VA draw of typical factory mounted compo nents in the low voltage heat pump The total VA draw of the heat pump internal components plus any attached accessories must be lower than the VA capacity of the unit control transformer Step 10 Configure Unit Co...

Page 41: ... or Deluxe D controls it will include an aquastat for economizer control The aquastat can be adjusted between 20 F and 60 F When the water loop temperature is below the aquastat set point the economizer is enabled The recommended aquastat set point is 55 F See Fig 37 BOILERLESS HEAT CONTROL DELUXE D ONLY All units with Deluxe D control include an aquastat for boilerless heat control The aquastat c...

Page 42: ...d tagout procedures to ensure that power is removed from the unit 2 Remove the front access cover 3 Remove the blower speed wire from the blower relay Clip the 1 4 in quick connect from the lead and cap the unused lead 4 Uncap the desired blower speed wire and terminate with 1 4 in quick connect Connect to the blower relay 5 If the motor is a 460 V motor and the speed is changed from high to mediu...

Page 43: ...670 640 585 530 030 3 High MED 2 1225 1195 1170 1140 1110 1075 1010 940 745 2 Medium 1110 1075 1045 1015 985 955 915 880 700 1 Low 955 925 890 860 825 790 750 715 685 036 3 High MED 2 1440 1420 1400 1380 1345 1315 1240 1165 1005 845 2 Medium 1340 1315 1290 1270 1245 1225 1180 1135 990 845 1 Low 1190 1165 1140 1115 1090 1065 1040 1020 915 810 042 3 High MED 2 1645 1635 1610 1585 1560 1535 1510 1485...

Page 44: ...0 1150 Normal 1000 1000 1000 1000 1000 1000 1000 1000 1000 850 850 850 850 850 850 850 850 850 036 B Normal 1380 1380 1380 1380 1380 1380 1380 1380 1380 1380 Normal 1200 1200 1200 1200 1200 1200 1200 1200 1200 1200 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 042 C Normal 1610 1610 1610 1610 1610 1610 1610 1610 1610 1610 Normal 1400 1400 1400 1400 1400 1400 1400 1400 1400 1400 1190 1190 1190 ...

Page 45: ...motor housing has been flooded Be sure the loop flow center provides adequate flow through the unit by checking pressure drop across the heat exchanger Compare the results to the data in Table 13 System Flow FLOW VERIFICATION The 50PS WSHP units do not include a factory flow switch as standard It is recommend to field installed a flow switch or spe cial order a flow switch as factory installed to ...

Page 46: ...sor rotation direction SCROLL COMPRESSOR ROTATION It is important to be certain compressor is rotating in the proper di rection To determine whether or not compressor is rotating in the proper direction 1 Connect service gages to suction and discharge pressure fittings 2 Energize the compressor by using the thermostat or DDC control to put the unit in cooling mode 3 The suction pressure should dro...

Page 47: ...and record the operating data 2 Check for water leaks and vibration 3 Check for warm air delivery at unit grille a few minutes after the unit has begun to operate 4 Verify that the compressor is on and that the water flow rate is correct by measuring pressure drop through the heat exchanger using P T plugs 5 Check the temperature of both supply and discharge water Compare to Tables 17 18 If temper...

Page 48: ...157 188 to 211 86 to 103 237 to 282 90 to 108 269 to 316 60 5 117 to 151 194 to 218 121 to 156 200 to 224 123 to 159 204 to 229 111 to 133 270 to 324 117 to 141 302 to 360 10 117 to 151 204 to 228 121 to 156 211 to 235 123 to 159 215 to 240 106 to 129 258 to 311 112 to 136 294 to 341 15 117 to 151 211 to 235 121 to 156 218 to 242 123 to 159 222 to 247 101 to 122 251 to 302 106 to 128 283 to 337 70...

Page 49: ...STATUS LED SOFT LOCKOUT RECORD ALARM START COUNTER IF APPLICABLE CC OUTPUT ON NO YES LPC CLOSED FRZ TEMP LIMIT Y1 ON TIME 30 SEC CON 0 POWER SWITCHES SENSOR STATUS CHECK START TIMER NO YES NO YES NO YES T ASC OR RS SEC YES NO NO YES START ANTI SHORT CYCLE INITIAL POWER UP YES NO START RANDOM START UP START COUNTER NEEDED YES COUNT 2 OR COUNT 4 BLINK CODE ON STATUS LED DISPLAY OUTPUT PULSE ALR OUTP...

Page 50: ...ase refer to the WSHP Open Integration Guide and the WSHP Points Properties Manual See Fig 40 for WSHP Open Control Board overview COOLING The control will operate one or two stages of compression to maintain the desired cooling set point To improve dehumidifica tion and reduce noise the control operates the fan at the lowest speed possible to satisfy the load conditions If cooling is active and s...

Page 51: ...so the SAT will not exceed the Maximum Heating SAT limit and subject to a two min ute minimum OFF time to prevent excessive valve cycling SINGLE STAGE ELECTRIC AUXILIARY HEAT The control can operate a single stage of electric heat connected to a coil on the discharge side of the unit in order to maintain the de sired heating set point should the compressor capacity be insuffi cient or a compressor...

Page 52: ...re If the optional coil is provided and the water loop conditions are suit able then the valve will open to provide cooling to the space when required Should the capacity be insufficient for a period greater than 5 minutes or should a high humidity condition occur then the compressor will be started to satisfy the load Should the SAT reach the Minimum Cooling SAT limit the economizer valve will cl...

Page 53: ...g occupied periods the controller uses the occupied high RH alarm limit Whenever an occupancy transition from unoccupied to occupied occurs or the occupied high alarm limit is lowered caus ing an alarm condition to occur the control will automatically cal culate an alarm delay equivalent to the configured delay time in minutes RH times the humidity error condition that occurred This will prevent n...

Page 54: ...is from evaporator coil as required by condi tion of the coil Clean coil with a stiff brush vacuum cleaner or compressed air Use a fin comb of the correct tooth spacing when straightening mashed or bent coil fins Condenser Cleaning Water cooled condensers may require cleaning of scale water de posits due to improperly maintained closed loop water systems Sludge build up may need to be cleaned in a...

Page 55: ...he following UNIT PROTECTION MODULE UPM Each unit is factory provided with a UPM board that controls the compressor operation and monitors the safeties The UPM board should be one of the first areas to start with troubleshooting an equipment issue See Fig 43 Fig 43 Unit Protection Module UPM Safety controls include the following High pressure switch located in the refrigerant discharge line and wi...

Page 56: ...dicator The UPM includes an alarm indicator with blink codes to indicate a UPM fault See Table 19 Table 19 UPM Board Fault Blink Codes Freeze Protection Sensors 1 and 2 FP1 and FP2 FP1 is located on the refrigerant liquid line between the TXV and the coaxial heat exchanger If the temperature of the refrigerant en tering the coaxial coil heating mode drops below or remains at 26 F 6 6 C for 30 seco...

Page 57: ...l the alarm is cleared If pulsed PULSE is selected the UPM will sequence the alarm con tact with the fault LED flashes Test Mode TEST In test mode the ASC and Random Start time delays are reduced 5 seconds and 10 seconds respectively and serve no function to the end user equipment The alarm and display relays also pulse for both soft and hard lockout conditions and are both cleared through a manua...

Page 58: ...ews onto most valves but not all are intended to be replaceable If the assembly is not replaceable replace the entire valve 2 Particulate debris within the system can be caused by several sources including contaminated components tubing and ser vice tools or improper techniques used during brazing opera tions and component replacement Problems associated with particulate debris can be com pounded ...

Page 59: ... to remove or repair any TXV CAUTION Use caution when tightening the strap The strap must be tight enough to hold the bulb securely but caution must be taken not to over tighten the strap which could dent bend collapse or otherwise damage the bulb CAUTION Puron refrigerant R 410A requires the use of synthetic lu bricant POE oil Do not use common tools on systems that contain R 22 refrigerants or m...

Page 60: ...ne Filter Drier Com pressor Solenoid Reversing Valve Coil Suct In TXV Sensing Bulb LPS AP AP HPS LPS Access Point 1 4 Male NPT High Pressure Switch Insulated Piping Extended Range Only Low Pressure Switch Test Point for Water Regulating Valve Optional HPS AP Disch Out Only Present on Scroll Compressor Models All Pilot and Equalizer Lines 1 4 OD LEGEND ...

Page 61: ... fault overloaded control circuit Check control voltage if it is below 18 V check accessories connected to the unit and ensure that they do not exceed the VA draw shown on page 41 Brown out fault bad thermostat connection Check that thermostat wiring is proper gage and length that it is not damaged and that all connections at the thermostat and heat pump are secure X Is fault LED Blinking 6 times ...

Page 62: ...thermostat Check that the reversing valve theromstat wire is connected to the O terminal of the thermostat Check for a contact closure between O and R Loose wire on O terminal Check that the wires from the thermostat to the unit are securely connected and that the wires from the electrical box to the reversing valve are connected Excessively cold supply air temperature in cooling or excessively ho...

Page 63: ...installed Y N Is an air filter installed Y N II START UP Is fan operating when compressor operates Y N If 3 phase scroll compressor is present verify proper rotation per instructions Y N UNIT VOLTAGE COOLING OPERATION Phase AB Volts Phase BC Volts Phase CAVolts if 3 phase if 3 phase Phase AB Amps Phase BC Amps Phase CAAmps if 3 phase if 3 phase CONTROL VOLTAGE Is control voltage above 21 6 volts Y...

Page 64: ...ION TEMPERATURE SUCTION SATURATION TEMPERATURE DEG F SUBCOOLING DISCHARGE SATURATION TEMPERATURE LIQUID LINE TEMPERATURE DEG F Use 500 for water 485 for antifreeze SUCTION COMPRESSOR DISCHARGE COAX EXPANSION VALVE F F AIR COIL F PSI FLUID OUT FLUID IN F PSI F LIQUID LINE PSI F SAT LOOK UP PRESSURE DROP IN WATERSIDE PRESSURE DROP TABLE TO DETERMINE FLOW RATE a50 8494 See Table 13 for Waterside Pres...

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