Carrier 50DP User Manual
Page 13
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correct superheat for various operating conditions.
An accurate pressure gage and temperature sensing
device are required. Connect temperature sensing
device to service port on suction line and insulate it
so that outdoor ambient temperature does not
affect reading. Indoor air cfm must be within
normal operating range of unit.
TO ÚSE COOLING CHARGING CHART - Take
outdoor ambient temperature and read the suction
pressure gage. Refer to chart to determine correct
suction temperature. If suction temperature is high,
add refrigerant. If suction temperature is low, care
fully blow some of the charge. Recheck suction
pressure as charge is adjusted.
Example: Fig. 19 — 50DP012
Outdoor Temperature............................................ 75 F
Suction Pressure....................................................65 F
Suction Temperature should be............................ 62 F
(Suction Temperature may vary ±5 F.)
If Chargemaster® charging device is used, tem
perature and pressure readings must be accom
plished using appropriate charging chart.
Fig. 20 — Charging Chart — 50DP014
20
30
40
50
60
SUCTK3N LINE TEMP F
70
20
30
40
50
60
SUCTION LINE TEMP F
70
Fig. 19 — Charging Chart — 50DP012
Fig. 21 — Charging Chart — 50DP016
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