Cooling Charging Charts; How To Use Cooling Charging Charts - Carrier WeatherMaster 50HCQ04-12 Service And Maintenance Instructions

CLAMP
TXV SENSING
BULB
SENSING BULB INSULATION REMOVED FOR CLARITY
Fig. 19 — TXV Valve and Sensing Bulb

COOLING CHARGING CHARTS

How To Use Cooling Charging Charts

Take the outdoor ambient temperature and read the suction
pressure gauge. Refer to chart to determine what suction tem-
perature should be. If suction temperature is high, add refriger-
ant. If suction temperature is low, carefully recover some of the
charge. Recheck the suction pressure as charge is adjusted.
SIZE DESIGNATION
A04
A05
A06
A07
D07
D08
D09
D12
EXAMPLE:
50HCQD12
Outdoor Temperature . . . . . . . . . . . . . . . . . . 85° F (29° C)
Suction Pressure . . . . . . . . . . . . . . . . . 140 psig (965 kPa)
Suction Temperature should be . . . . . . . . . . 55° F (13° C)
Refer to Fig. 20-28 for Cooling Charging Charts.
THERMAL EXPANSION
(TXV) VALVE
NOMINAL TONS REFERENCE
3.0
4.0
5.0
6.0
6.0
7.5
8.5
10.0
COOLING CHARGING CHARTS
Fig. 20 — Cooling Charging Chart — 50HCQA04
Fig. 21 — Cooling Charging Chart — 50HCQA05
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