25
11.0 SEQUENCE OF OPERATION
11.1 COOLING (COOLING ONLY OR HEAT PUMP)
• When the thermostat “calls for cooling,” the circuit between R and G is completed,
causing the blower relay (BR) to energize. The N.O. contacts will close, causing the
indoor blower motor (IBM) to operate. The circuit between R and Y is also completed:
This circuit closes the contactor (CC) in the outdoor unit starting the compressor
(COMP) and outdoor fan motor (OFM).
11.2 HEATING (ELECTRIC HEAT ONLY)
• When the thermostat “calls for heat,” the circuit between R and W is completed, and
the heater sequencer (HR
1
) is energized. The heating elements (HE) and the indoor
blower motor (IBM) will come on. Units with a second heater sequencer (HR
2
) can be
connected with the first sequencer (HR
1
) to W on the thermostat sub-base or con-
nected to a second stage W
2
on the sub-base.
11.3 HEATING (HEAT PUMP)
• When the thermostat “calls for heat,” the circuits between R and B, R and Y and R
and G are completed. Circuit R and B energizes the reversing valve (RV) switching it
to the heating position (remains energized as long as selector switch is in “heat” posi-
tion). Circuit R and Y energizes the contactor (CC) starting the outdoor fan motor
(OFM) and compressor (COMP). Circuit R and G energizes the blower relay (BR)
starting the indoor blower motor (IBM).
!"#$#%&'()*(+,(-%.(,/%&012-,(-%&012/
OD DB
13PJP18
RHBL-FR24T
13PJP24
RHBL-FR24T
13PJP30
RHBL-FR36T
13PJP36
RHBL-FR36T
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115
525 / 154
553 / 151
511 / 149
488 / 143
105
460 / 152
487 / 149
452 / 147
430 / 140
95
399 / 150
428 / 146
398 / 145
378 / 139
82
333 / 146
358 / 143
333 / 142
316 / 136
75
302 / 144
322 / 141
302 / 140
286 / 133
55
221 / 141
238 / 136
224 / 136
212 / 129
&''3,(-%4')*%5%F6G5&''3,(-%7*86,2*9*(/+%5%H,(13%&012-*%C*2,I,;1/,'(
115
21
22
14
11
105
20
21
14
11
95
19
20
14
11
82
18
20
14
11
75
19
20
13
11
55
18
19
13
12
J*1/,(-%4')*%5%#2*++62*%7*86,2*9*(/+%5%:2'++%&012-*%&0*;<%=>?@%A?,86,)%#2*++62*%B%C1D'2%#2*++62*E
60
356 / 121
350 / 103
338 / 107
372 / 111
47
318 / 104
321 / 92
324 / 97
342 / 98
35
273 / 84
262 / 78
294 / 84
291 / 82
17
255 / 61
255 / 55
265 / 59
272 / 58
J*1/,(-%4')*%5%F6G5&''3,(-%7*86,2*9*(/+%5%H,(13%&012-*%C*2,I,;1/,'(
60
19
18
24
29
47
16
17
23
27
35
10
12
18
21
17
7
6
11
14
