Instruction manual

XI. TIME-DELAY RELAY
The Time-Delay Relay (TDR) is a solid-state control, recycle
delay timer which keeps indoor blower operating for 60 sec. after
thermostat is satisfied. This delay enables blower to remove
residual cooling in coil after compression shutdown, thereby
improving efficiency of system. The sequence of operation is that
on closure of wall thermostat and at end of a fixed on delay of 1
sec., fan relay is energized. When thermostat is satisfied, an off
delay is initiated. When fixed delay of 60± 5 sec. is completed, fan
relay is de-energized and fan motor stops. If wall thermostat closes
during this delay, TDR is reset and fan relay remains energized.
TDR is a 24-v device that operates within a range of 15-v to 30-v
and draws about 0.5 amps. If the blower runs continuously instead
of cycling off when the fan switch is set on AUTO, the TDR is
probably defective and must be replaced.
XII. LOSS OF CHARGE SWITCH
The loss of charge switch is located on the outdoor liquid line. This
switch contains a Schrader core depressor. This switch opens at 7
psig and closes at 22 psig. No adjustment is necessary.
NOTE: Because these switches are attached to refrigeration
system under pressure, it is not advisable to remove this device for
troubleshooting unless you are reasonably certain that a problem
exists. If switch must be removed, remove and recover all system
charge so that pressure gages read 0 psi. Never open system
without breaking vacuum with dry nitrogen.
XIII. CHECK DEFROST THERMOSTAT
There is a liquid header with a brass distributor and feeder tube
going into outdoor coil. At the end of 1 of the feeder tubes, there
SUCTION LINE PRESSURE (KILOPASCALS)
SUCTION LINE PRESSURE (PSIG)
-7 -1 4 10 16 21 27
SUCTION LINE TEMPERATURE (°F)
SUCTION LINE TEMPERATURE (°C)
689
620
551
483
414
345
276
207
100
90
80
70
60
50
40
30
(018) 60HZ CHARGING CHART
20.0 30.0 40.0 50.0 60.0 70.0 80.0
OUTDOOR TEMP
° F ° C
115 46
125 52
45 7
55 13
65 18
75 24
95 35
105 41
85 29
50JS500087
C00026
Fig. 26—Cooling Charging Chart, 601A 018 Units
Fig. 28—Cooling Charging Chart, 601A030
C00028
SUCTION LINE PRESSURE (KILOPASCALS)
SUCTION LINE PRESSURE (PSIG)
-7 -1 4 10 16 21 27
SUCTION LINE TEMPERATURE (°F)
SUCTION LINE TEMPERATURE (°C)
689
620
551
483
414
345
276
207
100
90
80
70
60
50
40
30
(030) 60HZ CHARGING CHART
20.0 30.0 40.0 50.0 60.0 70.0 80.0
OUTDOOR TEMP
° F ° C
115 46
125 52
45 7
55 13
65 18
75 24
95 35
105 41
85 29
50JS500089
SUCTION LINE PRESSURE (KILOPASCALS)
SUCTION LINE PRESSURE (PSIG)
-7 -1 4 10 16 21 27
SUCTION LINE TEMPERATURE (°F)
SUCTION LINE TEMPERATURE (°C)
758
689
620
551
483
414
345
276
110
100
90
80
70
60
50
40
(024) 60HZ CHARGING CHART
20.0 30.0 40.0 50.0 60.0 70.0 80.0
OUTDOOR TEMP
° F ° C
115 46
125 52
45 7
55 13
65 18
75 24
95 35
105 41
85 29
50JS500088
C00027
Fig. 27—Cooling Charging Chart, 601A 024 Units
SUCTION LINE PRESSURE (KILOPASCALS)
SUCTION LINE PRESSURE (PSIG)
-7 -1 4 10 16 21 27
SUCTION LINE TEMPERATURE (°F)
SUCTION LINE TEMPERATURE (°C)
689
620
551
483
414
345
276
207
100
90
80
70
60
50
40
30
(036) 60HZ CHARGING CHART
20.0 30.0 40.0 50.0 60.0 70.0 80.0
OUTDOOR TEMP
° F ° C
115 46
125 52
45 7
55 13
65 18
75 24
95 35
105 41
85 29
50JS500090
C00029
Fig. 29—Cooling Charging Chart, 601A 036 Units
—23—