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HEATING CYCLE
ELECTRICAL
Supply Voltage
Compressor Amps 1
Compressor Amps 2
Supply Fan Amps
TEMPERATURES
Outdoor-air Temperature
Return-air Temperature
Cooling Supply Air Temperature
PRESSURES
Refrigerant Suction
Refrigerant Discharge
Verify Refrigerant Charge using Charging Charts (Y/N) _____
GENERAL
Economizer minimum vent and changeover settings to job requirements (if equipped) (Y/N) _____
Verify smoke detector unit shutdown by utilizing magnet test (Y/N) _____
REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS
IV. PREMIERLINK
™
START-UP
STEPS
1. Check CTB for jumper 5, 6, 7 (Jumper 5, 6, 7 must be cut and open) (Y/N) _____
2. Open humidistat contacts (Y/N) _____
3. Start unit In cooling (Close Y1) (Y/N) _____
OBSERVE AND RECORD
A. Suction pressure
B. Discharge pressure
C. Entering air temperature
D. Liquid line temperature at outlet or reheat coil
E. Confirm correct rotation for compressor (Y/N) _____
F. Check for correct ramp-up of outdoor fan motor as condenser coil warms (Y/N) _____
4. Check unit charge per charging chart (Y/N) _____
5. Switch unit to high-latent mode (sub-cooler) by closing humidistat with Y1 closed (Y/N) _____
OBSERVE
A. Reduction in suction pressure (5 to 7 psi expected) (Y/N) _____
B. Discharge pressure unchanged (Y/N) _____
C. Liquid temperature drops to 50 to 55°F range (Y/N) _____
D. LSV solenoid energized (valve closes) (Y/N) _____
6. Switch unit to dehumid (reheat) by opening Y1 (Y/N) _____
OBSERVE
A. Suction pressure increases to normal cooling level
B. Discharge pressure decreases (35 to 50 psi)
C. Liquid temperature returns to normal cooling level
D. LSV solenoid energized (valve closes)
E. DSV solenoid energized, valve opens
7. With unit in dehumid mode close W1 compressor and outdoor fan stop; LSV and DSV solenoids de-energized
(Y/N) _____
8. Open W1 restore unit to dehumid mode (Y/N) _____
9. Open humidistat input compressor and outdoor fan stop; LSV and DSV solenoids de-energized (Y/N) _____
10. Restore set-points for thermostat and humidistat (Y/N) _____
© 2020 Carrier
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500282-01
L1-L2_____________
L1 _____________
L1 _____________
L1 _____________
_____________ °F DB (Dry Bulb)
_____________ °F DB
_____________ °F
CIRCUIT A _____________ PSIG
CIRCUIT B _____________ PSIG
CIRCUIT A _____________ PSIG
CIRCUIT B _____________ PSIG
Printed in U.S.A.
Form 50HCQ-12-03SI
L2-L3_____________
L2 _____________
L2 _____________
L2 _____________
_____________ °F Wb (Wet Bulb)
_______________ PSIG
_______________ PSIG
_______________ ° F
_______________ ° F
Pg CL-2
L3-L1_____________
L3 _____________
L3 _____________
L3 _____________
5-2020
Replaces: 50HCQ-12-02SI
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