21
SIZE DESIGNATION
NOMINAL TON
REFERENCE
17 15
20 17.5
24 20
28 25
EXAMPLE:
Model 48HC*D28
Circuit A
Outdoor Temperature 85_F(29_C)..................
Suction Pressure 125 psig (862 kPa).................
Suction Temperature should be 63_F(17_C)..........
Circuit B
Outdoor Temperature 85_F(29_C)..................
Suction Pressure 120 psig (827 kPa).................
Suction Temperature should be 58_F(14_C)..........
Using The Cooling Charging Charts
Take the outdoor ambient temperature and read the
suction pressure gauge. Refer to chart to determine what
suction temperature should be. If suction temperature is
high, add refrigerant.
If suction temperature is low, carefully recover some of
the charge. Recheck the suction pressure as charge is
adjusted.
Select the appropriate unit charging chart from Fig. 25,
26, 27, 28, 29 30 31 and 32.
Take the outdoor ambient temperature and read the
suction pressure gauge. Refer to chart to determine what
suction temperature should be. If suction temperature is
high, add refrigerant. If suction temperature is low,
carefully recover some of the charge. Recheck the suction
pressure as charge is adjusted.
For 17--28 sizes, perform this procedure once for Circuit
A (using the Circuit A chart) and once for Circuit B (using
the Circuit B chart).
48HC
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