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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500239-01
Printed in U.S.A.
Form 50KC-4-6-03SI
Pg CL-2
3-2020
Replaces: 50KC-4-6-02SI
© 2020 Carrier Corporation
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IV. HUMIDI-MIZER
®
START-UP
NOTE: Units equipped with RTU Open controls have Service Test menus or modes that can assist with the Humidi-MiZer System
Start-Up function and provide the means to make the observations listed for this 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
_______________ PSIG
B. Discharge pressure
_______________ PSIG
C. Entering air temperature
_______________ ° F
D. Liquid line temperature at outlet or reheat coil
_______________ ° F
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) _____
(Jumper 32L Motormaster
®
temperature sensor during this check. Remove jumper when complete.)
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 (Y/N) _____
B. Discharge pressure decreases (35 to 50 psi) (Limited by Motormaster control)
C. Liquid temperature returns to normal cooling level (Y/N) _____
D. LSV solenoid energized (valve closes) (Y/N) _____
E. DSV solenoid energized, valve opens (Y/N) _____
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) _____
REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS.
Summary of Contents for 50KC04
Page 4: ...4 Fig 2 Unit Dimensional Drawing of Units Built On and After 4 15 19...
Page 5: ...5 Fig 3 Unit Dimensional Drawing of Units Built on and Prior to 4 15 19...
Page 6: ...6 Fig 4 Unit Corner Weights and Clearances...
Page 7: ...7 Fig 5 Base Rail Details...
Page 8: ...8 Fig 6 Thru the Base Charts...
Page 35: ...35 Fig 49 Electro Mechanical Control Wiring Diagram...
Page 36: ...36 Fig 50 Electro Mechanical Control Wiring Diagram with Humidi MiZer System...
Page 37: ...37 Fig 51 Electro Mechanical Power Wiring...
Page 38: ...38 Fig 52 PremierLink Wiring Schematic...
Page 39: ...39 Fig 53 PremierLink Wiring Schematic with Humidi MiZer System...
Page 40: ...40 Fig 54 RTU Open System Control Wiring Diagram...
Page 41: ...41 Fig 55 RTU Open System Control Wiring Diagram with Humidi MiZer System...
Page 47: ...47 Fig 63 TXV Metering Device Position in Reheat Coil Typical Diagram for Sizes 04 06 TXV...
Page 48: ......
Page 49: ......