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Carrier Aquazone 50HQP 072, Installation, Start-Up And Service Instructions Manual

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Carrier Aquazone 50HQP 072 Installation, Start-Up And Service Instructions Manual Download Page 44

44

FORCED CIRCULATION METHOD 
Fully open vent  pipe  when  filling condenser. The  vent  may be

closed when condenser is full and pump is operating. See Fig. 34.

Regulate flow to condenser with a supply line valve. If pump is a

non-overloading type, the valve may be fully closed while pump

is running.

For average scale deposit, allow solution to remain in condenser

overnight.  For heavy scale deposit, allow  24 hours. Drain con

-

denser  and  flush  with  clean  water.  Follow  acid  manufacturer’s

instructions.

Fig. 34 — 

Forced Circulation Method

Checking System Charge

Units  are  shipped  with  full  operating  charge.  If  recharging  is

necessary:

1. Insert thermometer bulb in insulating rubber sleeve on liq

-

uid line near filter drier. Use a digital thermometer for all

temperature  measurements.  DO  NOT  use  a  mercury  or

dial-type thermometer.

2. Connect pressure gage to discharge line near compressor.

3. After unit conditions have stabilized, read head pressure

on discharge line gage.
NOTE: Operate unit a minimum of 15 minutes before check

-

ing charge.

4. From standard field-supplied Pressure-Temperature  chart

for  R-410A,  find  equivalent  saturated  condensing

temperature.

5. Read  liquid  line  temperature  on  thermometer;  then

subtract from saturated condensing temperature. The dif

-

ference equals subcooling temperature.

Refrigerant Charging

NOTE: Do not vent or depressurize unit refrigerant to atmosphere.

Remove and recover refrigerant following accepted practices.

Air Coil Fan Motor Removal

Motor power wires need to be disconnected from motor   termi

-

nals before motor is removed from unit.

1. Shut off unit main power supply.

2. Loosen bolts on mounting bracket so that fan belt can be

removed.

3. Loosen and remove the 2 motor mounting bracket bolts on

left side of bracket.

4. Slide motor/bracket assembly to extreme right and lift out

through  space  between  fan  scroll  and  side  frame.  Rest

motor  on  a  high  platform  such  as  a  step  ladder.  Do  not

allow motor to hang by its power wires.

TROUBLESHOOTING

When troubleshooting problems with a WSHP, consider the fol

-

lowing and see Table 9:

Thermistor

A thermistor may be required for single-phase units where starting

the unit is a problem due to low voltage. See Fig. 35 for thermistor

nominal resistance.

WARNING

To  prevent  personal  injury,  wear  safety  glasses  and  gloves

when handling refrigerant. Do not overcharge system — this

can cause compressor flooding.

SUCTION

PUMP
SUPPORT

TANK

FINE MESH
SCREEN

RETURN

GAS VENT

PUMP

PRIMING
CONN.

GLOBE
VALVES

SUPPLY

1

”

 PIPE

CONDENSER

REMOVE WATER
REGULATING VALVE

CAUTION

Before  attempting  to  remove  fan  motors  or  motor  mounts,

place a piece of plywood over evaporator coils to prevent coil

damage.

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

0.0

20.0

40.0

60.0

80.0

100.0

120.0

140.0

Temperature (degF)

Resistance (kOhm)

Fig. 35 —

 Thermistor Nominal Resistance

Summary of Contents for Aquazone 50HQP 072

Page 1: ...gure Unit Control Components 32 UNIT PROTECTION MODULE UPM FREEZE SENSOR UPM DIP SWITCH SETTINGS PRE START UP 33 System Checkout 33 AIR COIL FIELD SELECTABLE INPUTS 34 START UP 34 Operating Limits 34 ENVIRONMENT POWER SUPPLY UNIT STARTING CONDITIONS Start Up System 34 Scroll Compressor Rotation 34 Flow Regulation 37 Flushing 37 Antifreeze 38 Cooling Tower Boiler Systems 38 Ground Coupled Closed Lo...

Page 2: ...nstructions literature is for Aquazone water source heat pump systems Water source heat pumps WSHPs are single package vertically or horizontally mounted units with a reversible refrigeration cycle for year round cooling and heating IMPORTANT Read the entire instruction manual before start ing installation WARNING Electrical shock can cause personal injury or death Before installing or servicing s...

Page 3: ...ping conduit etc to block filter access 7 Provide sufficient access to allow maintenance and servic ing of the blower and blower motor compressor and coils Removal of the entire unit from the installation area should not be necessary 8 Provide an unobstructed path to the unit within the closet or mechanical room Space should be sufficient to allow return air to freely enter the space 9 Provide rea...

Page 4: ...ill be available 10 50HQP Only Locate the hanging bracket kit located in the compressor compartment 11 50HQP Only For units with the SAVTM or single speed VFD option locate the VFD ships in control box section or on the pallet with the unit See Fig 1 for VFD shipping box location If VFD is not found contact your Carrier sales representative Fig 1 Field Installed VFD Shipping Location 50HQP Units A...

Page 5: ...4 NA 3 4 NA Unit Ship Weight Vert Horiz lb 715 715 752 752 980 980 NA 1150 1140 NA NA 1620 Unit Operating Weight Vert Horiz lb 670 670 702 702 935 935 NA 1060 1050 NA NA 1530 50HQP VQP UNIT SIZE 181 210 240 242 300 360 Compressor Type Scroll Scroll Scroll Scroll Scroll Scroll Quantity 2 2 2 2 2 2 Total Refrigerant Charge lb 15 25 16 25 18 13 18 13 18 13 36 00 Air Coil Dimensions in H x L Qty 24 x ...

Page 6: ...3 38 28 00 16 75 1 25 12 50 13 50 5 25 150 25 50 42 00 82 00 2 00 20 50 18 50 24 00 2 75 24 00 17 75 1 50 18 50 16 00 14 00 24 x 34 x 1 2 per unit 1 00 MOUNTING HOLES 5 8 IN DIAMETER 3 00 4 50 2 00 1 50 J J L 5 50 K H G E F CONDENSER WATER IN CONDENSER WATER OUT RETURN AIR BLOWER MOTOR ORIENTATION CONDENSATE DRAIN 2 120 LEFT RETURN RIGHT DISCHARGE RETURN AIR CONDENSATE DRAIN 2 BLOWER MOTOR ORIENTA...

Page 7: ...MINAL A B C E F G H DIAMETER FPT J K L M 180 25 25 60 25 106 50 2 00 24 00 22 00 22 00 6 25 22 00 16 00 1 5 27 75 17 25 5 00 4 00 24 x 34 x 1 2 per unit 242 36 00 60 25 106 50 2 00 34 75 32 75 24 50 7 25 24 50 19 62 2 0 23 75 19 75 7 75 9 75 171 4 x 341 2 x 1 4 per unit MOUNTING HOLES 1 IN DIAMETER 1 50 4 00 1 00 3 00 3 00 7 00 MOUNTING BRACKET SECTION VIEW B C A 67 00 DEPTH HEIGHT WIDTH CONDENSAT...

Page 8: ...2 00 42 00 32 00 14 75 8 50 2 75 1 120 62 00 42 00 32 00 15 00 9 00 3 00 1 25 E C B A HEIGHT CONDENSER WATER OUT CONDENSATE DRAIN CONDENSER WATER IN D 42 00 32 00 ELECTRICAL CONNECTIONS 24 00 20 00 9 00 6 00 34 00 22 00 34 00 28 00 7 00 2 00 17 50 22 00 BLOWER MOTOR ORIENTATION TOP SUPPLY TOP SUPPLY REAR SUPPLY TOP SUPPLY 24 00 6 00 9 00 20 00 C B A HEIGHT CONDENSER WATER OUT CONDENSATE DRAIN COND...

Page 9: ... 00 24 x 24 x 1 4 per unit 181 70 00 52 50 32 00 17 00 10 50 3 00 11 2 5 00 17 50 20 00 24 00 70 00 52 50 32 00 50 00 CONDENSER WATER OUT CONDENSATE DRAIN CONDENSER WATER IN C B A ELECTRICAL CONNECTIONS 44 25 22 00 22 00 44 25 12 12 28 00 2 00 17 50 BLOWER MOTOR ORIENTATION OPTIONAL BLOWER ORIENTATION STANDARD BLOWER ORIENTATION 5 00 17 50 20 00 24 00 70 00 CONDENSER WATER OUT CONDENSATE DRAIN CON...

Page 10: ...00 32 00 18 00 8 75 2 75 2 40 00 38 00 300 66 50 80 00 32 00 18 00 8 75 2 75 2 40 00 38 00 360 86 50 80 00 32 00 17 00 9 00 3 50 2 60 00 58 00 30 x 341 2 x 1 4 per unit size 360 only HEIGHT 7 00 28 00 10 00 34 00 34 00 4 50 28 00 2 00 17 50 C B A 80 00 32 00 BLOWER MOTOR ORIENTATION CONDENSER WATER OUT CONDENSATE DRAIN CONDENSER WATER IN ELECTRICAL CONNECTIONS D E 6 0 9 0 20 0 24 0 14 0 22 0 34 00...

Page 11: ...lectrical control boxes Blower Motor Blower Motor Blower Blower BlowerMotor Sheave Pulley Belt Access 18 Minimum 24 Optimum Compressor Accesss and Electrical Control Access 36 Minimum BlowerWheel Housing 18 Minimum 24 Optimum Blower Compressor Front of Unit Electrical Control Box Blower motor and blower housing access is required on BOTH SIDES of the unit Blower Wheel Housing 18 Minimum 24 Optimum...

Page 12: ...s The rods are usually attached to the unit corners by hanger bracket kits See Fig 9 The rods must be se curely anchored to the ceiling Refer to the hanging bracket as sembly and installation instructions Included with the unit for details All 50HQP units include an integral angle iron frame with mounting holes present See unit horizontal detail drawing Hor izontal units installed above the ceilin...

Page 13: ...as the capacity to handle the air required for the unit application If the duct system is too small larger ductwork must be installed Be certain to check for existing leaks and repair The duct system and all diffusers should be sized to handle the de signed airflow quietly To maximize sound attenuation of the unit blower the supply and return air plenums should be insulated There should be no dire...

Page 14: ...all valves should be installed in the supply and return lines for unit isolation and unit water flow balancing Pressure temperature ports are recommended in both the supply and return lines for system flow balancing The water flow can be accurately set by measuring the water to refrigerant heat exchang ers water side pressure drop See the unit specification sheets for the water flow and pressure d...

Page 15: ...EWT MIN 1 LINE VOLTAGE DISCONNECT 2 FLEX DUCT CONNECTION 3 LOW VOLTAGE CONTROL CONNECTION 4 LINE VOLTAGE CONNECTION 5 VIBRATION PAD 6 P T PORTS 7 HOSE KITS Optional 8 BALL VALVES 9 SOLENOID VALVE SLOW CLOSING 10 CONDENSATE DRAIN CONNECTION 11 PRESSURE TANK Optional ...

Page 16: ...ween the unit and the open cooling tower may also be used It is imperative that all air is eliminated from the closed loop side of the heat exchanger to prevent condenser fouling In the heating mode heat is absorbed from the water loop to the unit Aboiler can be utilized to maintain the loop within the proper temperature range No unit should be connected to the supply or return piping until the wa...

Page 17: ... without unit mounted disconnect switches except units with dual power supply power is connected to the line L side of the compressor contactor and the ground lug in the unit electrical box CONTROL TRANSFORMER SETTING FOR 208V UNITS As factory built all 208 230 v units are wired for 230 v operation For job sites with a 208 v power supply the primary leads on the unit transformer will need to be ch...

Page 18: ... 15 Earth Coupled Applications Fig 16 Electrical Control Box Location 50HQP Units ELECTRICAL CONNECTIONS CONDENSATE DRAIN ELECTRICAL BOX CONTROLS COMPRESSORS ACCESS COMPRESSORS REFRIGERATION COMPONENTS ACCESS ...

Page 19: ... 7 83 0 1 6 2 2 37 0 50 460 3 60 6 2 41 0 1 3 1 2 17 1 20 575 3 60 4 8 33 0 1 2 6 2 13 4 15 120 208 230 1 60 26 3 134 0 1 9 8 2 69 0 90 208 230 3 60 15 6 110 0 1 8 0 3 43 1 50 460 3 60 7 8 52 0 1 3 9 3 21 5 25 575 3 60 5 8 38 9 1 3 7 3 16 8 20 150 208 230 3 60 19 2 136 0 1 9 2 3 52 4 70 460 3 60 8 7 66 1 1 4 3 3 23 9 30 575 3 60 6 9 55 3 1 3 7 3 19 2 25 180 208 230 3 60 22 4 149 0 2 6 2 2 62 8 80 ...

Page 20: ... 15 6 110 0 1 6 2 2 41 3 50 460 3 60 7 8 52 0 1 3 1 2 20 7 25 575 3 60 5 8 38 9 1 2 6 2 15 7 20 151 208 230 3 60 19 2 136 0 1 8 0 3 51 2 70 460 3 60 8 7 66 1 1 3 9 3 23 5 30 575 3 60 6 9 55 3 1 3 7 3 19 2 25 181 208 230 3 60 22 4 149 0 1 13 4 5 63 8 80 460 3 60 10 6 75 0 1 6 6 5 30 5 40 575 3 60 7 7 54 0 1 5 4 5 22 7 30 210 208 230 3 60 29 5 195 0 2 4 8 11 2 76 0 100 460 3 60 14 7 95 0 2 2 4 11 2 ...

Page 21: ... Single Phase Complete C Control Package DEFAULT SETTINGS FOR COMPLETE C BOARD FROM FACTORY SHOWN COMPLETE C INCLUDES BUILT IN 270 300 SECOND RANDOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS ...

Page 22: ... 19 Single Phase Deluxe D Control Package DEFAULT SETTINGS FOR DELUXE D BOARD FROM FACTORY SHOWN DELUXE D INCLUDES BUILT IN 270 300 SECOND RANDOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS ...

Page 23: ...23 Fig 20 Single Phase with WSHP Open ...

Page 24: ...21 3 Phase Complete C Control Package COMPLETE C INCLUDES BUILT IN 270 300 SECOND RANDOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS DEFAULT SETTINGS FOR COMPLETE C BOARD FROM FACTORY SHOWN ...

Page 25: ...ig 22 3 Phase Deluxe D Control Package DEFAULT SETTINGS FOR DELUXE D BOARD FROM FACTORY SHOWN DELUXE D INCLUDES BUILT IN 270 300 SECOND RANDOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS ...

Page 26: ...26 Fig 23 3 Phase with WSHP Open ...

Page 27: ... Complete C Control Package with Hot Gas Reheat DEFAULT SETTINGS FOR COMPLETE C BOARD FROM FACTORY SHOWN COMPLETE C INCLUDES BUILT IN 270 300 SECOND RANDOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS ...

Page 28: ...28 Fig 25 3 Phase Deluxe D Control Package with 1 Speed VFD and Hot Gas Reheat ...

Page 29: ...29 Fig 26 3 Phase with WSHP Open Hot Gas Reheat Water Economizer and SAVTM ...

Page 30: ...hase Complete C Board with Water Economizer DEFAULT SETTINGS FOR COMPLETE C BOARD FROM FACTORY SHOWN COMPLETE C INCLUDES BUILT IN 270 300 SECOND RANDOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS ...

Page 31: ...31 Fig 28 WSHP Open W2A Wiring Diagram ...

Page 32: ...opera tion when a 24V signal is removed from the relay Removing the 24V signal causes the relay to open which cuts 24V power to the unit control circuit All unit components will be disabled at when the EMS is deactivated See Fig 19 BOILERLESS HEAT CONTROL DELUXE D ONLY All units with Deluxe D control include a boilerless heat relay that can be field wired to enable an external heat source when the...

Page 33: ...ete 5 Air is purged from closed loop system 6 System is balanced as required Monitor if necessary 7 Isolation valves are open 8 Water control valves or loop pumps are wired 9 Condensate lines are open and correctly pitched 10 Transformer switched to lower voltage tap 208V if necessary 11 Blower rotates freely shipping support is removed 12 Blower speed is on correct setting 13 Air filter is clean ...

Page 34: ...ver any of these factors are at a minimum or maximum level the other two factors must be at a normal level to ensure proper unit operation See Table 5 Table 5 50HQP VQP Unit Operating Limits LEGEND With antifreeze optional extended range insulation and low temperature cutout jumper clipped for antifreeze Scroll Compressor Rotation It is important to be certain compressor is rotating in the proper ...

Page 35: ...21 392 4 5 25 30 50 13 0 116 142 192 234 13 16 21 26 104 127 333 407 7 9 27 33 22 0 111 135 182 222 9 12 22 27 109 133 340 415 5 6 28 34 60 13 0 119 146 228 279 13 16 21 26 120 146 352 430 8 10 30 37 22 0 113 138 217 265 9 11 22 27 125 153 359 439 6 7 32 39 70 13 0 122 149 264 323 13 15 20 25 136 166 371 453 9 12 33 41 22 0 116 142 251 307 9 11 21 26 142 174 378 462 7 8 35 43 80 13 0 125 152 301 3...

Page 36: ... 45 0 125 153 291 356 10 12 18 22 123 151 319 390 8 10 29 35 90 25 0 134 164 349 426 17 20 17 20 128 157 324 396 13 16 29 36 45 0 129 158 328 401 9 12 18 22 135 165 332 406 9 11 31 38 100 25 0 139 170 392 480 16 20 16 20 45 0 133 163 369 451 9 11 17 21 210 30 28 0 71 87 277 339 6 7 15 19 52 0 75 92 284 347 4 5 16 20 40 28 0 118 144 194 237 21 25 19 23 84 102 291 356 7 9 18 22 52 0 113 138 182 223 ...

Page 37: ...when it is added in the process it can be wasted Refer to the Antifreeze section for more detail Loop static pressure will fluctuate with the seasons Pressures will be higher in the winter months than during the warmer months This fluctuation is normal and should be considered when charging the system initially Run the unit in either heating or cool ing for several minutes to condition the loop to...

Page 38: ...TANDBY Y and W terminals are not active in Standby mode However the O and G terminals may be active depending on the application The compressor will be off COOLING Yand O terminals are active in Cooling mode After power up the first call to the compressor will initiate a 270 to 300 second ran dom start delay and a 5 minute anti short cycle protection time de lay After both delays are complete the ...

Page 39: ...TING The control will operate 1 or 2 stages of compression to maintain the desired heating setpoint To reduce noise the control operates the fan at the lowest speed possible If the heating is active and should the SAT approach the maximum SAT limit the fan will be indexed to the next higher speed Should this be insufficient then if the SAT rises further and reaches the Maximum Heating SAT limit th...

Page 40: ...e will modulate closed during compressor operation HEATING Additionally the control will modulate the water valve should the entering water loop temperature be suitable for heating at least 5 F above space temperature and heat is required The valve will be controlled in a similar manner except to satisfy the heating re quirement Should the coil capacity be insufficient to satisfy the space load co...

Page 41: ...time hours exceed the configurable limit an alarm is generated To reset the alarm timer after the alarm has been generated a Reset FilterAlarm input is provided The filter alarm can be disabled by setting the Filter Alarm Timer Delay to zero factory default COMPRESSOR FAULT LOCKOUT ALARM The control will monitor a discrete input to determine the com pressor state Should the input state not match t...

Page 42: ...42 Fig 32 WSHP Open Controls with UPM Board ...

Page 43: ... treatment can minimize tube fouling and pitting If such conditions are anticipated water treatment analysis is recom mended Refer to the Carrier System Design Manual Part 5 for general water conditioning information Clean condensers with an inhibited hydrochloric acid solution The acid can stain hands and clothing damage concrete and without inhibitor damage steel Cover surroundings to guard agai...

Page 44: ...rging NOTE Do not vent or depressurize unit refrigerant to atmosphere Remove and recover refrigerant following accepted practices Air Coil Fan Motor Removal Motor power wires need to be disconnected from motor termi nals before motor is removed from unit 1 Shut off unit main power supply 2 Loosen bolts on mounting bracket so that fan belt can be removed 3 Loosen and remove the 2 motor mounting bra...

Page 45: ...ant Recover refrigerant evacuate and recharge with factory recommended charge High pressure Check for defective or improperly calibrated high pressure switch UNIT OFF ON LOW PRESSURE CONTROL Suction pressure too low In COOLING mode Lack of or inadequate air flow Entering air temperature too cold Blower inoperative clogged filter or restrictions in ductwork In HEATING mode Lack of or inadequate wat...

Page 46: ...ight to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53500286 01 Printed in U S A Form 50HQP VQP 4SI Pg 46 10 2020 Replaces 50HQP VQP 2SI 2020 Carrier ...

Page 47: ...N HAS CONDENSATE CONNECTION BEEN MADE AND IS ATRAP INSTALLED Y N ISANAIR FILTER INSTALLED Y N III 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 ABAMPS PHASE BC AMPS PHASE CAAMPS if 3 phase if 3 phase CONT...

Page 48: ...CLE ANALYSIS HEAT OF EXTRACTION ABSORPTION OR HEAT OF REJECTION FLOW RATE GPM x TEMP DIFF DEG F x FLUID FACTOR BTU HR SUPERHEAT SUCTION 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 WATER OUT WATER IN F PSI F LI...

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