Rheem 13 Series User Manual

25
TABLE 7
HEAT PUMP SYSTEM TROUBLESHOOTING TIPS
HEAT PUMP SYSTEM
TROUBLESHOOTING TIPS
16.5 SUBCOOLING CALCULATION
1. Measure the liquid pressure at the liquid line service valve.
2. Convert the liquid line pressure to saturated temperature. See Table 6.
3. Measure the liquid line temperature at the liquid line service valve.
4. Compare the liquid line temperature to the saturated temperature.
5. The difference between saturated temperature and liquid line temperature is the
subcooling. Subcooling normal range 9° to 12° in the cooling mode. Subcooling
in the heating mode can vary widely from model to model and should never be
used to determine the correct charge in the field.
DISCHARGE SUCTION
SUPERHEAT SUBCOOLING
COMPRESSOR
PRESSURE PRESSURE AMPS
Overcharge High High Low High High
Undercharge Low Low High Low Low
Liquid Restriction (Drier) Low Low High High Low
Low Evaporator Airflow Low Low Low Low Low
Dirty Heat Pump High High Low Low High
Low Outside Ambient Temperature Low Low High High Low
Inefficient Compressor Low High High High Low
TEV Feeler Bulb Charge Lost Low Low High High Low
Poorly Insulated Sensing Bulb High High Low Low High
SYSTEM PROBLEM
INDICATORS
TABLE 6
TEMPERATURE PRESSURE CHART
TEMP R-410A
(Deg. F) [°C] PSIG [kPa]
-150 [-101.1] —
-140 [-95.5] —
-130 [-90] —
-120 [-84.4] —
-110 [-78.8] —
-100 [-73.3] —
-90 [-67.7] —
-80 [-62.2] —
-70 [-56.6] —
-60 [-51.1] 0.4 [2.7]
-50 [-45.5] 5.1 [35.1]
-40 [-40] 10.9 [75.1]
-35 [-37.2] 14.2 [97.9]
-30 [-34.4] 17.9 [123.4]
-25 [-31.6] 22.0 [151.7]
-20 [-28.8] 26.4 [182.0]
-15 [-26.1] 31.3 [215.8]
-10 [-23.3] 36.5 [251.6]
-5 [-20.5] 42.2 [290.9]
0 [-17.7] 48.4 [333.7]
5 [-15] 55.1 [379.9]
10 [-12.2] 62.4 [430.2]
15 [-9.4] 70.2 [484.0]
20 [-6.6] 78.5 [541.2]
25 [-3.8] 87.5 [603.3]
30 [-1.1] 97.2 [670.2]
35 [1.6] 107.5 741.2]
40 [4.4] 118.5 [817.0]
45 [7.2] 130.2 [897.7]
50 [10] 142.7 [983.9]
55 [12.7] 156.0 [107.6]
60 [15.5] 170.1 [1172.8]
65 [18.3] 185.1 [1276.2]
70 [21.1] 201.0 [1385.8]
75 [23.3] 217.8 [1501.7]
80 [26.6] 235.6 [1624.4]
85 [29.4] 254.5 [1754.7]
90 [32.2] 274.3 [1891.2]
95 [35] 295.3 [2036.0]
100 [37.7] 317.4 [2188.4]
105 [40.5] 340.6 [2348.3]
110 [43.3] 365.1 [2517.3]
115 [46.1] 390.9 [2695.2]
120 [48.8] 418.0 [2882.0]
125 [51.6] 446.5 [3078.5]
130 [54.4] 476.5 [3285.3]
135 [57.2] 508.0 [3502.5]
140 [60] 541.2 [3731.4]
145 [62.7] 576.0 [3971.4]
150 [65.5] 612.8 [4225.1]

Rheem 13 Series Specifications

General

Refrigerant	R-410A
Voltage	208/230V
Compressor Type	Scroll
Cooling Capacity	18, 000-60, 000 BTU/h
Heating Capacity	18, 000-60, 000 BTU/h
Stages	Single