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Carrier 50HJ008-014, Инструкция по установке, запуску и обслуживанию, Страница: 37 / 40

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Table 19 — Parablade Economizer Troubleshooting

PROBLEM

CAUSE

REMEDY

Damper does not
open.

Evaporator fan not on.

Check wiring between G on connection board and evaporator-fan contactor.

No power to economizer
motor.

1. Disconnect power at TR and TR1. Disconnect jumper across P and P1.
2. Connect jumper across TR and TR1.
3. Connect jumper across T1 and T.
4. If connected, remove enthalpy sensor from terminals S

O

and

1

.

5. Apply power (24 vac) to terminals TR and TR1. The LED should be off and

the damper should be in the closed position.

6. Disconnect the factory-installed 620 ohm resistor from terminals S

R

and

1

.

The LED should light up and the motor should drive towards open. If this
does not happen, replace the economizer control module.

Economizer motor failure.

If the evaporator fan and economizer motor are energized, verify that there is a
minimum of 24 vac at terminals TR and TR1. If the motor is not operating, re-
place the motor.

Economizer operation
limited to minimum
position.

Economizer control module
failure.

1. To simulate high or low enthalpy, reconnect the factory-installed 620 ohm

resistor across terminals S

R

and

1

.

2. Connect 1.2 Kohm checkout resistor across terminals S

O

and

1

. Turn the

enthalpy set point to ‘‘A.’’ The LED should turn on, indicating low enthalpy.
The motor should drive towards open. If LED does not light, replace module.
If motor does not drive open, check motor operation.

3. Turn the enthalpy set point to ‘‘D.’’ The LED should turn off, indicating high

enthalpy. The motor should drive toward closed position. If these actions do
not occur, replace economizer control module.

4. Disconnect 1.2 Kohm checkout resistor before resuming operation.

Damper does not
close.

No power to economizer.

1. Disconnect power at TR and TR1. Disconnect jumper across P and P1.
2. Connect jumper across TR and TR1.
3. Connect jumper across T1 and T.
4. If connected, remove enthalpy sensor from terminals S

O

and

1

. Factory-

installed 620 ohm resistor should be connected to terminals S

R

and

1

.

5. Apply power (24 vac) to terminals TR and TR1. The LED should be off and

the damper should be in the closed position.

6. Disconnect the factory-installed 620 ohm resistor from terminals S

R

and

1

.

The LED should light up and the motor should drive toward open position. If
this does not happen, replace the economizer control module.

Spring return failure.

If power to unit is off and damper does not close, check for a bound linkage. If
linkage is not bound, then internal spring may be broken. Replace actuator.

Economizer motor failure.

If the economizer control module is functioning properly, verify that there is a
minimum of 24 vac at terminals TR and TR1. If the motor is not operating, re-
place the motor.

Damper does not
open or close
according to enthalpy
readings.

Sensor incorrectly wired or
bad.

To verify sensor operation, reconnect the

1

lead of the outdoor enthalpy sensor

to the

1

terminal of the economizer control module. Connect a DC milliammeter

between terminals S

O

of the economizer control module and terminal S of the

enthalpy sensor. The milliammeter should indicate between 3 and 25 mA if the
sensor is operating properly. If the milliammeter indicates 0, the sensor may be
wired backwards. If any other readings are shown, replace the sensor.

LED — Light-Emitting Diode

37

Содержание 50HJ008-014

Страница 1: ...curb in accordance with instructions shipped with curb See Fig 1 Install insulation cant strips roofing felt and counter flash ing as shown Ductwork must be attached to curb If electric or control pow...

Страница 2: ...ttom UNIT SIZE 50HJ A ROOF CURB ACCESSORY 008 014 18 29 356 CRRFCURB003A00 28 09 610 CRRFCURB004A00 NOTES 1 Roof curb accessory is shipped unassembled 2 Insulated panels 3 Dimensions in are in millime...

Страница 3: ...of run Do not use a pipe size smaller than the unit connection Step 4 Rig and Place Unit Inspect unit for trans portation damage File any claim with transportation agency Keep unit upright and do not...

Страница 4: ...ng to prevent rigging straps from damaging unit 3 Unit weights do not include economizer See Table 1 for econo mizer weights All panels must be in place when rigging 50HJ MAX WEIGHT A B C lb kg in mm...

Страница 5: ...20 Motor Frame 56 56 56 56 Fan Rpm Range Std 840 1085 840 1085 860 1080 900 1260 Alt 860 1080 Motor Bearing Type Ball Ball Ball Ball Maximum Fan Rpm 2100 2100 2100 2100 Motor Pulley Pitch Diameter A...

Страница 6: ...ow 4 Ductwork to be attached to accessory roof curb only 5 Minimum clearance local codes or jurisdiction may prevail a Bottom to combustible surfaces when not using curb 0 in on horizontal discharge u...

Страница 7: ...ing units provide a disconnect per the NEC All field wiring must comply with the NEC and local re quirements In Canada electrical connections must be made in accordance with CSA Canadian Standards Ass...

Страница 8: ...0 21 7 25 0 33 3 38 5 66 6 77 0 88 4 102 0 104 4 120 3 55 9 55 9 55 9 55 9 55 9 61 4 96 6 109 5 123 7 140 8 143 5 133 5 60 60 60 60 70 70 100 110 125 150 150 150 59 59 59 59 59 59 89 101 114 129 132...

Страница 9: ...0 21 7 25 0 33 3 38 5 66 6 77 0 88 4 102 0 104 4 120 3 61 9 61 9 61 9 61 9 61 9 66 4 101 5 114 5 128 7 145 8 148 5 138 5 70 70 70 70 70 70 110 125 150 150 150 150 64 64 64 64 64 64 94 106 119 135 138...

Страница 10: ...n Table 3 FLA Full Load Amps HACR Heating Air Conditioning and Refrigeration IFM Indoor Evaporator Fan Motor LRA Locked Rotor Amps MCA Minimum Circuit Amps MOCP Maximum Overcurrent Protection NEC Nati...

Страница 11: ...with the air hood package If unit is to be used for vertical dis charge application discard this plate Assembly 1 Determine if ventilation air is required in building If so determine the minimum amoun...

Страница 12: ...lenoid Valve S LPS Low Pressure Switch Subcooler only TRAN Transformer Factory Wiring Accessory or Optional Wiring Fig 11 Typical MoistureMiser Dehumidification Package Humidistat Wiring 208 230 V Uni...

Страница 13: ...s 9 Remove tape from outdoor air thermostat OAT Fas ten OAT to inside of hood using screws and speed clips provided See Fig 21 Make sure OAT terminals are po sitioned up 10 Replace outdoor air opening...

Страница 14: ...Put aside screen retainer and retainer screw for later as sembly Do not attach hood to unit at this time 4 On 012 and 014 units install vertical discharge block off plate over duct openings See Fig 1...

Страница 15: ...N 3 1 T P P1 T1 4 2 5 S S O D C TR B REV B 1 9 8 8 1 8 A H U M I D I T Y 90 70 60 30 10 D C B A 60 65 70 75 55 50 85 80 DAMPER DAMPER CLOSED OPEN OUTDOOR TEMP F REV 97 3672 CW SETPOINTS CCW CONTACTS S...

Страница 16: ...s provided and in stall bottom stop 11 Slide outdoor air inlet screens into screen track on hood side plate While holding screens in place fasten screen retainer to hood using screws provided See Fig...

Страница 17: ...pulley hub and tighten setscrew See Table 1 for speed change for each full turn of pulley flange To align fan and motor pulleys 1 Loosen fan pulley setscrews 2 Slide fan pulley along fan shaft 3 Make...

Страница 18: ...12 1 88 862 2 15 911 2 46 3100 646 1 15 709 1 39 772 1 70 825 1 99 875 2 28 923 2 58 3200 662 1 25 724 1 50 785 1 80 840 2 11 887 2 41 934 2 71 3300 679 1 35 740 1 61 798 1 91 854 2 24 900 2 54 946 2...

Страница 19: ...813 2 39 867 2 74 915 3 06 960 3 40 4200 830 2 55 883 2 91 931 3 24 4250 839 2 63 892 3 00 939 3 34 AIRFLOW Cfm EXTERNAL STATIC PRESSURE in wg 1 4 1 6 1 8 2 0 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 2550 908...

Страница 20: ...3000 886 1 73 943 1 88 988 1 91 995 1 95 3100 892 1 78 947 2 00 995 2 05 1008 2 07 3200 899 1 85 951 2 06 1000 2 17 1021 2 20 3300 907 1 93 959 2 10 1004 2 33 1036 2 36 3400 915 2 01 966 2 17 1009 2...

Страница 21: ...2 3800 959 2 38 1001 2 58 1040 2 78 1075 2 96 3900 969 2 50 1010 2 70 1049 2 91 1085 3 11 4000 979 2 62 1020 2 83 1059 3 04 1095 3 25 4100 989 2 74 1029 2 96 1068 3 18 1105 3 39 4200 1000 2 86 1039 3...

Страница 22: ...2300 816 1 65 859 1 94 888 2 24 903 2 55 911 2 85 2400 824 1 72 872 2 01 909 2 32 931 2 64 935 2 96 2500 832 1 79 882 2 09 925 2 40 955 2 72 972 3 06 2550 836 1 83 887 2 13 931 2 45 964 2 77 986 3 11...

Страница 23: ...SSURE in wg 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 2550 836 1 83 887 2 13 931 2 45 964 2 77 986 3 11 2660 839 1 87 891 2 17 936 2 49 973 2 82 999 3 16 2700 846 1 95 898 2 26 946 2...

Страница 24: ...7 2 10 988 2 05 995 2 20 3400 853 1 71 899 1 93 951 2 17 995 2 17 1008 2 32 3500 862 1 78 907 2 01 959 2 24 1000 2 33 1021 2 47 3600 871 1 86 915 2 09 965 2 32 1005 2 46 1036 2 59 3700 879 1 95 927 2...

Страница 25: ...3 03 1058 3 29 1100 3 53 4400 945 2 68 988 2 89 1028 3 14 1066 3 41 1106 3 67 4500 955 2 82 996 3 02 1037 3 25 1074 3 54 1113 3 81 4600 967 2 96 1005 3 16 1046 3 38 1084 3 66 1121 3 95 4700 980 3 11 1...

Страница 26: ...es a re frigerant leak Leak test all refrigerant tubing connec tions using electronic leak detector halide torch or liquid soap solution c Inspect all field and factory wiring connections Be sure that...

Страница 27: ...emperature is below the OAT set ting and the thermostat calls for Y1 and G the economizer damper moves to the minimum position when the indoor evaporator fan starts The first stage of cooling is provi...

Страница 28: ...witch has closed and a new call for cooling exists The crankcase heaters on the scroll compressors provide additional protec tion for the compressors due to the additional refrigerant charge in the su...

Страница 29: ...Fig 33 MoistureMiser Option Operation 29...

Страница 30: ...ting dur ing charging procedure NO CHARGE Use standard evacuating techniques After evacuating system weigh in the specified amount of refrigerant refer to Table 1 LOW CHARGE COOLING Use Cooling Chargi...

Страница 31: ...harts Fig 38 41 for units with MoistureMiser option and DO NOT use Fig 42 45 for standard units TO USE COOLING CHARGING CHARTS STANDARD UNITS Take the outdoor ambient temperature and read the suction...

Страница 32: ...Fig 39 Cooling Charging Chart Standard 50HJ009 Fig 40 Cooling Charging Charts Standard 50HJ012 32...

Страница 33: ...harging Charts Standard 50HJ014 Fig 42 Cooling Charging Chart 50HJ008 with Optional MoistureMiser Dehumidification Package Fig 43 Cooling Charging Chart 50HJ009 with Optional MoistureMiser Dehumidific...

Страница 34: ...quid line solenoid valve will not operate 1 Solenoid coil defective replace 2 Solenoid valve stuck open replace Subcooler will not deenergize Liquid line solenoid valve will not open Valve is stuck cl...

Страница 35: ...Locate restriction and remove Compressor s operates continuously Dirty air filter Replace filter Unit undersized for load Decrease load or increase unit size Thermostat set too low Reset thermostat Lo...

Страница 36: ...nomizer control board wiring are correct check to ensure that the 24 vac terminal of the SAT has 24 vac white wire If OAT EC and control board are functioning and wired properly and no 24 vac exists c...

Страница 37: ...hese actions do not occur replace economizer control module 4 Disconnect 1 2 Kohm checkout resistor before resuming operation Damper does not close No power to economizer 1 Disconnect power at TR and...

Страница 38: ...programs include a video cassette and or slides and a companion booklet Use these for self teaching or to conduct full training sessions For a free Service Training Material Catalog STM call 1 800 96...

Страница 39: ......

Страница 40: ...LTAGE L1 L2 L2 L3 L3 L1 CIRCUIT 1 COMPRESSOR AMPS L1 L2 L3 CIRCUIT 2 COMPRESSOR AMPS L1 L2 L3 EVAPORATOR FAN AMPS L1 L2 L3 TEMPERATURES OUTDOOR AIR TEMPERATURE DB RETURN AIR TEMPERATURE DB WB COOLING...

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