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Carrier Aquazone 50PCH007 Installation, Start-Up And Service Instructions Manual Download Page 44

44

Filters

Filter changes or cleanings are required at regular intervals. The

time period between filter changes will depend upon type of envi-

ronment the equipment is used in. In a single family home, that is

not  under  construction,  changing  or  cleaning  the  filter  every  60

days may be sufficient. In other applications such as motels, where

daily  vacuuming  produces  a  large amount  of  lint,  filter  changes

may be need to be as frequent as biweekly. See Fig. 1 and 2 for re-

placement  filter  sizes.  Note  that  horizontal  units  containing  two

filters are taped together at the factory to facilitate removal. This

should be done by end user as new filters are installed.

Condensate Drain Pans

The condensate drain should be checked quarterly by cleaning and

flushing to ensure proper drainage.

Refrigerant System

Verify air and water flow rates are at proper levels before servic-

ing. To  maintain  sealed  circuitry  integrity,  do  not  install  service

gages unless unit operation appears abnormal. Check to see that

unit  is  within  the  superheat  and  subcooling  temperature  ranges

shown in Tables 16-28. If the unit is not within these ranges, re-

cover and reweigh in refrigerant charge.

Compressor

Conduct annual amperage checks to ensure that amp draw is no

more than 10% greater than indicated on the serial plate data. 

Fan Motors

All units have lubricated fan motors. Fan motors should never be

lubricated  unless  obvious,  dry  operation  is  suspected.  Periodic

maintenance oiling is NOT recommended as it will result in dirt

accumulating in the excess oil and cause eventual motor failure.

Conduct annual dry operation check and amperage check to en-

sure amp draw is no more than 10% greater than indicated on se-

rial plate data and to remove any build up on the blower assem-

bly.

Condensate Drain Cleaning

Clean the drain line and unit drain pan at the start of each cooling

season. Check flow by pouring water into drain. Be sure trap is

filled to maintain an air seal.

Air Coil Cleaning

Remove dirt and debris from evaporator coil as required by condi-

tion of the coil. A 10% solution of dishwasher detergent and water

is recommended for cleaning both sides of the coil, followed by a

thorough water rinse. Clean coil with a stiff brush, vacuum clean-

er, 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 an open water tower

system due to induced contaminants.
Local water conditions may cause excessive fouling or pitting of

tubes. Condenser tubes should therefore be cleaned at least once a

year, or more often if the water is contaminated.
Proper water 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

against splashing. Vapors from vent pipe are not harmful, but take

care to prevent liquid from being carried over by the gases.
Warm solution acts faster, but cold solution is just as effective if

applied for a longer period.
GRAVITY FLOW METHOD
Do not add solution faster than vent can exhaust the generated

gases. 
When condenser is full, allow solution to remain overnight, then

drain condenser and flush with clean water. Follow acid manufac-

turer’s instructions. See Fig. 26.

Fig. 26 — Gravity Flow Method

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. 27.
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.

WARNING

To prevent injury or death due to electrical shock or contact

with moving parts, open unit disconnect switch before servic-

ing unit.

IMPORTANT: Units should never be operated without a filter.

CAUTION

Equipment should never be used during construction or reno-

vation due to possibility of contaminants entering the air coil

of the equipment which permanently affects the performance

and may shorten the life of the equipment.

CAUTION

Follow all safety codes. Wear safety glasses and rubber gloves

when using inhibited hydrochloric acid solution. Observe and

follow acid manufacturer’s instructions.

FILL CONDENSER WITH
CLEANING SOLUTION. DO
NOT ADD SOLUTION
MORE RAPIDLY THAN
VENT CAN EXHAUST
GASES CAUSED BY
CHEMICAL ACTION.

PAIL

FUNNEL

CONDENSER

PAIL

3’ TO 4’

VENT
PIPE

5’ APPROX

1”
PIPE

Summary of Contents for Aquazone 50PCH007

Page 1: ...ERLESS HEAT CONTROL DELUXE D ONLY PRE START UP 24 System Checkout 24 CLEAN AIR COIL Set Blower Motor Speed 25 PERMANENT SPLIT CAPACITOR PSC MOTOR CONSTANT TORQUE ECM MOTOR System Flushing and Filling 29 System Flow 29 FLOW VERIFICATION FLOW REGULATION ANTIFREEZE FREEZE PROTECTION SELECTION START UP 30 Operating Limits 30 ENVIRONMENT POWER SUPPLY UNIT STARTING CONDITIONS Start Up Procedure 30 SCROL...

Page 2: ...orizontal ly and vertically mounted units with electronic controls designed for year round cooling and heating PRE INSTALLATION INSPECTION Upon receipt of shipment carefully check the shipment against the bill of lading Make sure all units have been received Inspect the carton or crating of each unit and inspect each unit for damage on both the interior and exterior Ensure the shipping company mak...

Page 3: ...e electrical data on the unit nameplate with to ver ify the jobsite power feed voltage amperage MCA and power protection MOCP 3 Verify that the unit is the correct model for the entering water temperature of the job standard or extended range 4 Remove the unit packaging keeping the unit attached to the shipping pallet Do not destroy packaging Save for re instal lation on the unit if the unit will ...

Page 4: ...eration Charge oz 16 19 21 Cu 19 Cu Ni 19 captube 17 TXV 22 Cu 35 Cu Ni 33 Air Coil Dimensions H x W 10 x 14 12 x 16 5 16 x 16 5 20 x 16 5 Std Filter 1 in Throwaway L x H 10 x 16 16 x 20 20 x 20 Opt Filter 2 in MERV 8 or 13 Throwaway L x H 10 x 16 16 x 20 20 x 20 Weight Operating lb 98 103 105 123 173 177 190 Weight Shipping lb 126 130 132 151 201 205 217 HORIZONTAL CABINET Refrigeration Charge oz...

Page 5: ...40 38 Cu 43 Cu Ni 39 52 59 64 Air Coil Dimensions H x W 24 x 20 2 20 x 16 24 x 20 2 24 x 26 75 32 x 26 2 Std Filter 1 in Throwaway L x H 24 x 24 20 x 20 24 x 24 24 x 30 16 x 30 2 Opt Filter 2 in MERV 8 or 13 Throwaway L x H 24 x 24 20 x 20 24 x 24 24 x 30 16 x 30 2 Weight Operating lb 229 217 239 287 307 336 Weight Shipping lb 255 243 265 312 331 360 HORIZONTAL CABINET Refrigeration Charge oz 40 N...

Page 6: ...NDENSER WATER CONNECTIONS FPT RECOMMENEDED REPLACEMENT NOMINAL FILTER SIZE WIDTH DEPTH HEIGHT CAB END TO FILTER RACK R A DUCT WIDTH CAB FRONT TO FILTER RACK WATER INLET WATER OUTLET SIDE TO DISC WIDTH DISC WIDTH TOP TO DISC FLE AND FRS DISC HEIGHT END TO DISC STR TOP TO DISC FRE AND FLS FILTER RACK HEIGHT R A DUCT FLANGE HEIGHT 007 19 0 33 0 11 5 1 5 16 15 15 35 2 38 9 50 5 375 6 30 5 97 4 10 4 87...

Page 7: ...OMMENEDED REPLACEMENT NOMINAL FILTER SIZE WIDTH DEPTH HEIGHT DISC DEPTH DISC WIDTH CABINET EDGE TO DISC LEFT SIDE TO DISC WATER INLET WATER OUTLET CONDENSATE DRAIN R A DUCT WIDTH R A DUCT FLANGE HEIGHT FILTER RACK HEIGHT 007 19 0 19 00 24 25 10 0 8 0 4 5 9 3 2 44 9 68 13 87 16 0 8 0 10 0 5 4 3 4 10x16x1 009 19 0 19 00 24 25 10 0 8 0 4 5 9 3 2 44 9 68 13 87 16 0 8 0 10 0 5 4 3 4 10x16x1 012 19 0 19...

Page 8: ...he system components be sure to examine each pipe fit ting and valve and remove any dirt or foreign material found in or on these components Step 4 Mount the Unit DUCT FLANGES The unit heat pumps feature foldout return and supply air duct flanges These fold out flanges allow the heat pumps to more easi ly fit through doorways and other tight spaces and also prevent damage in shipping and handling ...

Page 9: ... return air duct connections on metal duct systems All metal ducting should be insulated with a minimum of 1 in duct insulation to avoid heat loss or gain and prevent condensate from forming during the cooling operation Application of the unit to uninsu lated ductwork is not recommended as the unit s performance will be adversely affected If the unit will be installed in a new installation with ne...

Page 10: ...contain steel pipes or fittings may be subject to galvanic corrosion Dielectric fittings may be used to isolate the steel parts of the system to avoid gal vanic corrosion WATER LOOP APPLICATIONS Water loop applications usually include a number of units plumbed to a common piping system Maintenance to any of these units can introduce air into the piping system Therefore air elimi nation equipment c...

Page 11: ...of uninsulated pipe that provides a good measurement of the entering water temperature It is recom mended to insulate the sensing bulb after installation for better wa ter temperature sensing Step 8 Wire Field Power Supply See Fig 11 18 for typical wiring diagrams See Tables 4 and 5 for additional electrical data Please refer to the unit wiring diagram attached to the control panel for field insta...

Page 12: ... Stage Complete C Control UPM STATUS LED BLINK CODES 1 HIGH PRESSURE FAULT 2 LOW PRESSURE FAULT 3 CONDENSER FREEZE CONDITION 4 CONDENSATE OVERFLOW FAULT 5 BROWN OUT FAULT 6 EVAPORATOR FREEZE CONDITION BLK HI BLU MED RED LOW 50PC111000 REV 5 ...

Page 13: ...e Stage Deluxe D Control UPM STATUS LED BLINK CODES 1 HIGH PRESSURE FAULT 2 LOW PRESSURE FAULT 3 CONDENSER FREEZE CONDITION 4 CONDENSATE OVERFLOW FAULT 5 BROWN OUT FAULT 6 EVAPORATOR FREEZE CONDITION BLK HI BLU MED RED LOW 50PC111001 REV 5 ...

Page 14: ...ingle Phase Single Stage Complete C Control UPM STATUS LED BLINK CODES 1 HIGH PRESSURE FAULT 2 LOW PRESSURE FAULT 3 CONDENSER FREEZE CONDITION 4 CONDENSATE OVERFLOW FAULT 5 BROWN OUT FAULT 6 EVAPORATOR FREEZE CONDITION 50PC111002 REV 3 ...

Page 15: ...Single Phase Single Stage Deluxe D Control UPM STATUS LED BLINK CODES 1 HIGH PRESSURE FAULT 2 LOW PRESSURE FAULT 3 CONDENSER FREEZE CONDITION 4 CONDENSATE OVERFLOW FAULT 5 BROWN OUT FAULT 6 EVAPORATOR FREEZE CONDITION 50PC111003 REV 6 ...

Page 16: ... Stage Complete C Control UPM STATUS LED BLINK CODES 1 HIGH PRESSURE FAULT 2 LOW PRESSURE FAULT 3 CONDENSER FREEZE CONDITION 4 CONDENSATE OVERFLOW FAULT 5 BROWN OUT FAULT 6 EVAPORATOR FREEZE CONDITION BLK HI BLU MED RED LOW 50PC311000 REV 4 ...

Page 17: ...hree Phase Single Stage Complete C Control UPM STATUS LED BLINK CODES 1 HIGH PRESSURE FAULT 2 LOW PRESSURE FAULT 3 CONDENSER FREEZE CONDITION 4 CONDENSATE OVERFLOW FAULT 5 BROWN OUT FAULT 6 EVAPORATOR FREEZE CONDITION 50PC311002 REV 3 ...

Page 18: ...le Stage WSHP Open UPM STATUS LED BLINK CODES 1 HIGH PRESSURE FAULT 2 LOW PRESSURE FAULT 3 CONDENSER FREEZE CONDITION 4 CONDENSATE OVERFLOW FAULT 5 BROWN OUT FAULT 6 EVAPORATOR FREEZE CONDITION BLK HI BLU MED RED LOW ORG BLU RED BLK 50PC311016 REV 5 ...

Page 19: ...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 20: ... 15 50PC036 208 230 1 60 197 253 1 15 2 79 0 4 40 0 50 19 6 23 4 35 208 230 1 60 197 253 1 15 4 83 9 4 40 0 50 19 8 23 7 35 265 1 60 238 292 1 11 6 72 0 3 30 0 50 14 9 17 8 25 208 230 3 60 197 253 1 10 4 73 0 4 40 0 50 14 8 17 4 25 460 3 60 414 506 1 5 8 38 0 1 80 0 50 7 6 9 1 15 50PC041 208 230 1 60 197 253 1 15 4 83 9 4 40 0 75 19 8 23 7 35 208 230 3 60 197 253 1 10 4 73 0 4 40 0 75 14 8 17 4 25...

Page 21: ...1 60 197 253 1 15 4 83 9 4 1 0 50 19 5 23 4 35 2 265 1 60 238 292 1 11 6 72 0 3 6 0 50 15 2 18 1 25 3 208 230 3 60 197 253 1 10 4 73 0 4 1 0 50 14 5 17 1 25 4 460 3 60 414 506 1 5 8 38 0 2 1 0 50 7 9 9 4 15 50PC041 1 208 230 1 60 197 253 1 15 4 83 9 6 0 0 75 21 4 25 3 40 3 208 230 3 60 197 253 1 10 4 73 0 6 0 0 75 16 4 19 0 25 4 460 3 60 414 506 1 5 8 38 0 3 2 0 75 9 0 10 5 15 50PC042 1 208 230 1 ...

Page 22: ... 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 wa ter loop temperature drops below the boilerless heat control set point See Fig 14 ALARM OUTPUT ALL UNITS If the unit is being connected to a thermostat or DDC control with an alarm indicator this connection is made at the unit ...

Page 23: ... at the appro priate leaving water temperature and protect your heat pump from freezing if a freeze sensor is included 1 2 3 4 5 6 7 9 10 11 12 13 17 14 15 16 8 1 Board Power Indicator 2 UPM Status LED Indicator 3 Water Coil Freeze Protection Temperature Selection R30 4 Air Coil Freeze Protection Temperature Selection 5 UPM Settings 6 Water Coil Freeze Connection 7 Air Coil Freeze Connection 8 LED...

Page 24: ... disabled and a field provided auxiliary heat can be enabled The recommended aquastat set point is 55 F See Fig 22 Fig 22 Aquastat for Waterside Economizer and Boilerless Control PRE START UP System Checkout After completing the installation and before energizing the unit the following system checks should be made prior to initial start up 1 Verify that the supply voltage to the heat pump is in ac...

Page 25: ...w 1 Disconnect power to the heat pump and follow all proper lockout and 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 in quick connect from the lead and cap the unused lead 4 Uncap the desired blower speed wire and terminate with in quick connect Connect to the blower relay 5 If the moto...

Page 26: ...HIGH 041 3 4 LOW MED HIGH 042 1 2 LOW MED HIGH 048 3 4 LOW MED HIGH 060 1 LOW MED HIGH 070 1 LOW MED HIGH Table 9 Constant Torque ECM Selection UNIT SIZE MOTOR HP TAP 1 TAP 2 TAP 3 TAP 4 TAP 5 015 1 3 LOW MED LOW MED MED HI HIGH 018 1 3 LOW MED LOW MED MED HI HIGH 024 1 3 LOW MED LOW MED MED HI HIGH 030 1 2 LOW MED LOW MED MED HI HIGH 036 1 2 LOW MED LOW MED MED HI HIGH 041 3 4 LOW MED LOW MED MED...

Page 27: ...50 1080 1000 Med 1410 1350 1290 1220 1150 1060 900 High 1500 1440 1370 1290 1210 1120 1000 900 041 Low 1250 950 900 840 780 720 700 Med 1200 1140 1080 1010 930 870 820 High 1490 1400 1320 1240 1160 1080 990 910 042 Low 1400 1210 1210 1190 1160 1120 1080 Med 1460 1450 1430 1390 1330 1250 1160 High 1750 1710 1670 1620 1560 1460 1330 1210 1080 048 208 230v Low 1600 1450 1440 1420 1400 1360 1320 Med 1...

Page 28: ...30 4 1400 1360 1310 1250 1190 1120 1040 960 5 1470 1420 1360 1290 1220 1140 1050 970 890 041 1 1250 840 770 700 620 2 1220 1150 1080 1010 950 3 1430 1360 1280 1200 1130 1080 4 1540 1460 1380 1300 1220 1140 1060 5 1620 1550 1470 1370 1260 1180 1090 1000 042 1 1400 1270 1250 1230 1210 2 1440 1420 1410 1410 1400 1380 1340 3 1540 1530 1510 1500 1490 1470 1430 1350 4 1650 1630 1610 1600 1580 1530 1460 ...

Page 29: ...temperature When complete perform a final flush and pressurize the loop to a static pressure of 40 to 50 psig for winter months or 15 to 20 psig for summer months After pressurization be sure to remove the plug from the end of the loop pump motor s to allow trapped air to be discharged and to ensure the motor housing has been flooded Be sure the loop flow center provides adequate flow through the ...

Page 30: ...ARTING CONDITIONS Depending on the model units should start and operate with enter ing water temperature temperatures between 20 and 110 F and en tering air temperatures between 45 and 95 F Water flow rates should be between 1 5 and 3 0 GPM nominal cooling ton NOTE These operating limits are not normal or continuous oper ating conditions Assume that such a start up is for the purpose of bringing t...

Page 31: ...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 Check the elevation and cleanli ness of the condensate lines any dripping could be a sign of a blocked line Be sure the condensate trap includes a water seal 5 Check the temperature of both sup...

Page 32: ...197 349 426 13 16 15 19 1 9 155 190 317 387 8 10 16 20 DB Dry Bulb No Operation in This Temperature Range Table 17 50PC009 Typical Unit Operating Pressures and Temperatures ENTERING WATER TEMP F WATER FLOW GPM TON COOLING HEATING Suction Pressure PSIG Discharge Pressure PSIG Water Temp Rise F Air Temp Drop F DB Suction Pressure PSIG Discharge Pressure PSIG Water Temp Rise F Air Temp Drop F 30 1 8 ...

Page 33: ... 149 182 405 495 13 15 15 19 3 0 143 174 381 465 7 9 16 20 DB Dry Bulb No Operation in This Temperature Range Table 19 50PC015 Typical Unit Operating Pressures and Temperatures ENTERING WATER TEMP F WATER FLOW GPM TON COOLING HEATING Suction Pressure PSIG Discharge Pressure PSIG Water Temp Rise F Air Temp Drop F DB Suction Pressure PSIG Discharge Pressure PSIG Water Temp Rise F Air Temp Drop F 30 ...

Page 34: ...32 150 442 462 14 16 18 22 5 131 149 418 438 8 10 18 22 DB Dry Bulb No Operation in This Temperature Range Table 21 50PC024 Typical Unit Operating Pressures and Temperatures ENTERING WATER TEMP F WATER FLOW GPM TON COOLING HEATING Suction Pressure PSIG Discharge Pressure PSIG Water Temp Rise F Air Temp Drop F DB Suction Pressure PSIG Discharge Pressure PSIG Water Temp Rise F Air Temp Drop F 30 4 6...

Page 35: ...17 19 18 22 7 130 148 441 459 9 11 18 22 DB Dry Bulb No Operation in This Temperature Range Table 23 50PC036 Typical Unit Operating Pressures and Temperatures ENTERING WATER TEMP F WATER FLOW GPM TON COOLING HEATING Suction Pressure PSIG Discharge Pressure PSIG Water Temp Rise F Air Temp Drop F DB Suction Pressure PSIG Discharge Pressure PSIG Water Temp Rise F Air Temp Drop F 30 4 5 60 70 278 298 ...

Page 36: ...11 41 45 100 6 133 149 443 473 14 16 19 23 9 132 148 416 446 9 11 19 23 DB Dry Bulb No Operation in This Temperature Range Table 25 50PC042 Typical Unit Operating Pressures and Temperatures ENTERING WATER TEMP F WATER FLOW GPM TON COOLING HEATING Suction Pressure PSIG Discharge Pressure PSIG Water Temp Rise F Air Temp Drop F DB Suction Pressure PSIG Discharge Pressure PSIG Water Temp Rise F Air Te...

Page 37: ...6 125 141 454 474 19 21 19 23 12 122 138 406 426 10 12 19 23 DB Dry Bulb No Operation in This Temperature Range Table 27 50PC060 Typical Unit Operating Pressures and Temperatures ENTERING WATER TEMP F WATER FLOW GPM TON COOLING HEATING Suction Pressure PSIG Discharge Pressure PSIG Water Temp Rise F Air Temp Drop F DB Suction Pressure PSIG Discharge Pressure PSIG Water Temp Rise F Air Temp Drop F 3...

Page 38: ...63 14 17 20 25 93 114 299 365 8 9 24 29 16 117 143 201 246 11 13 21 26 99 121 305 373 6 7 25 31 60 12 123 150 248 304 14 17 20 24 106 129 321 392 9 11 26 32 16 119 146 232 284 10 13 21 25 113 138 327 400 7 8 28 34 70 12 126 154 282 344 14 17 19 24 118 145 342 418 10 12 29 35 16 122 149 263 322 10 13 20 25 126 154 349 427 8 9 30 37 80 12 129 157 315 385 13 16 19 23 131 160 364 444 11 14 31 38 16 12...

Page 39: ...h WSHP Open still feature a UPM board for unit opera tion so the operation will be similar to the sequence for the Com plete C and Deluxe D package WSHP Open does feature ad vanced functionality such as automatic fan speed control and in telligent alarming which will differ from the Complete C and Deluxe D packages Below is an overview of the different features for the WSHP Open controls For more ...

Page 40: ...K 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 OUTPUT ON PULSE NO YES HARD LOCKOUT CC OUTPUT OFF V 18VAC NO YES YES NO BLINK CODE ON STATUS LED NO RESET ON Y CLEAR FAULTS R 24VAC NO YES NO YES NO YES HPC CLOSED RESET ON...

Page 41: ...ll be controlled so the SAT will not exceed the Maximum Heating SAT limit 2 POSITION HOT WATER STEAM HEATING REHEAT The control can operate a two position NO or NC hot water or steam valve connected to a coil on the discharge side of the unit and supplied by a boiler in order to maintain the desired heating setpoint should the compressor capacity be insufficient or a com pressor failure occurs Unl...

Page 42: ...ld the coil capacity be insufficient to satisfy the space load conditions for more than 5 minutes then the compres sor will be started to satisfy the load As the SAT approaches the Maximum Heating SAT limit the economizer valve will modulate closed during compressor operation 2 POSITION WATER ECONOMIZER CONTROL The control has the capability to open a NO or NC two position water valve to control c...

Page 43: ...larm limit is changed to a value that causes an alarm condition to occur the control will automatically calculate an alarm delay based on the error from setpoint 15 minutes minimum This prevents nui sance alarms from occurring when occupancy changes The IAQ alarm can be disabled by setting Occupied High IAQ Alarm Lim it to zero RELATIVE HUMIDITY ALARM The control provides the ability to generate a...

Page 44: ...rrect 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 an open water tower system due to induced contaminants Local water conditions may cause excessive fouling or pitting of tubes Condenser tubes should t...

Page 45: ... from unit 1 Shut off unit main power supply and apply lock out tag out 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...

Page 46: ...eously starting at the same time after power up or after a power interruption thus avoiding creating large in rush current Low Pressure Bypass Timer If the compressor is running and the low pressure switch opens the controller will keep the compressor ON for 120 seconds After 2 minutes if the low pressure switch remains open the controllers will shut down the compressor and enter a soft lockout Th...

Page 47: ...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 manual reset UPM Sequence of Operations Figure 24 shows the UPM sequence of operations Thermistor A thermistor may be required for single phase units where starting the unit is a problem due to low volta...

Page 48: ...air nitrogen or water Contamination can be the result of improper service techniques use of contaminated components and or improper evacuation of the system Symptoms The symptoms of a failed TXV can be varied and will include one or more of the following Low refrigerant suction pressure High refrigerant superheat High refrigerant subcooling TXV and or low pressure tubing frosting Equalizer line co...

Page 49: ...ccess for adjustment and can lead to damage to the valve or equipment unintended venting of re frigerant personal injury or possibly death CAUTION Always recover the refrigerant from the system with suitable approved tools recovery equipment and practices prior to at tempting to remove or repair any TXV CAUTION Use caution when tightening the strap The strap must be tight enough to hold the bulb s...

Page 50: ...for blockage Check that there is adequate space between the return air opening and walls or other obstructions on free return applications X X Is fault LED Blinking 5 times Brown out fault low supply voltage Check primary voltage ensure it is within the limits listed on the unit data plate Brown out fault overloaded control circuit Check control voltage if it is below 18 V check accessories connec...

Page 51: ...aulty motor Check supply voltage to the motor Check that all motor wires are secure Move the TEST DIP switch to ON and the other switches to OFF on the ADJUST switch block on the interface board the motor should run at 70 torque whrn G is called With power off spin the motor shaft noise resistance or uneven motion can be signs of motor failure Unit not shifting into cooling X Reversing valve solen...

Page 52: ...n accordance with instructions Unit cabinet touching wall or other building component Adjust unit location to avoid unit touching structure X Compressor noise High water temperature or low water flow rate elevating head pressure Increase water flow rate and or reduce water temperature if possible Scaled or fouled water coil elevating heat pressure Clean descale water coil X Low airflow elevating h...

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Page 56: ... discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53500266 01 Printed in U S A Form 50PC 6SI Pg 56 1 2020 Replaces 50PC 5SI 2020 Carrier Corporation 8 733 954 886 ...

Page 57: ...AT HEAT EXCHANGER Y N HAS PUMP BEEN TURNED ON AND ARE ISOLATION VALVES OPEN Y N HAS CONDENSATE CONNECTION BEEN MADE AND IS ATRAP 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 phas...

Page 58: ...COOLING CYCLE AIR IN F AIR OUT F HEATING CYCLE AIR IN F AIR OUT F a50 8445 SUCTION COMPRESSOR DISCHARGE COAX EXPANSION VALVE F F AIR COIL F PSI WATER OUT WATER IN F PSI LOOK UP PRESSURE DROP IN TABLE 26 TO DETERMINE FLOW RATE F LIQUID LINE PSI F SAT SUCTION COMPRESSOR DISCHARGE COAX EXPANSION VALVE F F AIR COIL F PSI WATER OUT WATER IN F PSI LOOK UP PRESSURE DROP IN TABLE 26 TO DETERMINE FLOW RATE...

Page 59: ...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 ...

Page 60: ...at any time specifications or designs without notice and without incurring obligations Catalog No 04 53500266 01 Printed in U S A Form 50PC 6SI Pg CL 4 1 2020 Replaces 50PC 5SI 2020 Carrier Corporation CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE 8 733 954 886 ...

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