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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. 04-53500208-01
Printed in U.S.A.
Form 50HC-7-12-07SI
Pg CL-2
11-18
Replaces: 50HC-7-12-06SI
© Carrier Corporation 2018
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CUT ALON
G
DOTT
E
D
LINE
CU
T ALONG DOTTED LINE
PRESSURES
Refrigerant Suction
CIRCUIT A _____________ PSIG
CIRCUIT B _____________ PSIG
Refrigerant Discharge
CIRCUIT A _____________ PSIG
CIRCUIT B _____________ PSIG
Verify Refrigerant Charge using Charging Charts (Y/N) _____
GENERAL
Economizer minimum vent and changeover settings to job re
q
uirements (if e
q
uipped) (Y/N) _____
Verify smoke detector unit shutdown by utilizing magnet test (Y/N) _____
IV. HUMIDI-MIZER
®
SYSTEM START-UP
NOTE: Units e
q
uipped with either SystemVu™ or 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. Li
q
uid 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) _____
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. Li
q
uid temperature drops to 50 to 55°F range (Y/N) _____
D. Li
q
uid solenoid valve (LSV) 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. Li
q
uid temperature returns to normal cooling level
D. LSV solenoid energized (valve closes)
E. Discharge solenoid valve (DSV) energized, valve opens
7. With unit in dehumid mode close W1 compressor and outdoor fan stop; LSV and DSV solenoids are 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 WeatherMaster 50HC*A07 Series
Page 4: ...4 Fig 2 Unit Dimensional Drawing Sizes 07 09 ...
Page 5: ...5 Fig 2 Unit Dimensional Drawing Sizes 07 09 cont ...
Page 6: ...6 Fig 3 Unit Dimensional Drawing Sizes 11 and 12 ...
Page 7: ...7 Fig 3 Unit Dimensional Drawing Sizes 11 and 12 cont ...
Page 25: ...25 Fig 42 Electro Mechanical Control Wiring Diagram ...
Page 26: ...26 Fig 43 Electro Mechanical Control Wiring Diagram with Humidi MiZer System ...
Page 27: ...27 Fig 44 Typical ComfortLink Control Wiring Diagram 50HC 08 09 shown ...
Page 29: ...29 Fig 46 Typical PremierLink Control Wiring Diagram ...
Page 30: ...30 Fig 47 Typical PremierLink Control Wiring Diagram with Humidi MiZer System Option ...
Page 31: ...31 Fig 48 Typical RTU Open Controller Wiring Diagram ...
Page 32: ...32 Fig 49 Typical RTU Open Controller Wiring Diagram with Humidi MiZer System Option ...