Carrier 50TC Series - III. HUMIDI-MIZER SYSTEM START-UP; STEPS; OBSERVE AND RECORD; OBSERVE

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III. HUMIDI-- MIZER
R
SYSTEM START-UP
STEPS
j 1. CHECK CTB FOR JUMPER 5, 6, 7
JUMPER 5, 6, 7 MUST BE CUT AND OPEN
j 2. OPEN HUMIDISTAT CONTACTS
j 3. START UNIT IN COOLING (CLOSE Y1)
OBSERVE AND RECORD
A. SUCTION PRESSURE PSIG
B. DISCHARGE PRESSURE PSIG
C. ENTERING AIR TEMPERATURE _F
D. LIQUID LINE TEMPERATURE
AT OUTLET OR REHEAT COIL _F
E. CONFRIM CORRECT ROTATION FOR COMPRESSOR
F. CHECK FOR CORRECT RAMP--UP OF OJUTDOOR FAN MOTOR AS CONDENSER COIL WARMS
j 4. CHECK UNIT CHARGE PER CHARGING CHART
j 5. SWITCH UNIT TO HIGH--LATENT MODE (SUBCOOLER) BY CLOSING HUMIDIST AT WITH Y1 CLOSED
OBSERVE
j A. REDUCTION IN SUCTION PRESSURE (5 TO 7 PSI EXPECTED)
j B. DISCHARGE PRESSURE UNCHANGED
j C. LIQUID TEMPERATURE DROPS TO 50 TO 55_F RANGE
j D. LSV SOLENOID ENGERIZED (VALVE CLOSES)
j 6. SWITCH UNIT TO DEHUMID (REHEAT) BY OPENING Y1
OBSERVE
j A. SUCTION PRESSURE INCREASES TO NORMAL COOLING LEVEL
j B. DISCHARGE PRESSURE DECREASES (35 TO 50 PSI)
j C. LIQUID TEMPERATURE RETURNS TO NORMAL COOLNG LEVEL
j D. LSV SOLENOID ENERGIZED (VALVE CLOSES)
j E. DSV SOLENOID ENERGIZED, VALVE OPENS
j 7. WITH UNIT IN DEHUMID MODE CLOSE W1
COMPRESSOR AND OUTDOOR FAN STOP; LSV AND DSV SOLENOIDS DE--ENERGIZED
j 8. OPEN W1 RESTORE UNIT TO DEHUMID MODE
j 9. OPEN HUMIDISTAT INPUT
COMPRESSOR AND OUTDOOR FAN STOP; LSV AND DSV SOLENOIDS DE--ENERGIZED
j 10. RESTORE SETPOINTS FOR THERMOSTAT AND HUMIDISTAT
REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS
ECarri er Co rporation 2017 Edition Date: 07/ 17
P
rinted in U.S.A.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
C a t a l o g N o : 5 0 T C --- 8 --- 1 4 --- 0 2 S I
R e p l a c e s : 5 0 T C --- 8 --- 1 4 --- 0 1 S I
50TC