OPERATING |
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TIME | ||||
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T1
_
T2
BLK DENOTES CLOSED CONTACTS
HN67ZA002
A91436
3 | OPERATING | 5 MIN | |
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BLK DENOTES CLOSED CONTACTS | |||
HN67PA025, HN67ZA003, HN67ZA008 |
A91437
Fig. 16—Cycle-Protector Sequence
CUT YELLOW WIRE
BETWEEN CONTACTOR AND
Y |
| YEL |
| SAFETY |
| YEL |
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| CONTROL |
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| YEL | ||||
| BOARD |
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YEL | C | BRN | C |
VIO |
| TERMINAL | |
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| BOARD | |
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| CONNECTION |
T1 | LOGIC | T3 |
BLK
T2
A88415
Fig. 17—Cycle-Protector Wiring
DSV |
CH
11 | 21 |
A91426
Fig. 18—Wiring for Single-Pole Contactor
thereby improving the efficiency of the system. The sequence of operation is that on closure of the wall thermostat and at the end of a fixed
TDR is reset, and the fan relay remains energized. The TDR is a 24v device that operates within a range of 15 to 30v 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.
VII. PRESSURE SWITCHES
Pressure switches are protective devices wired into control circuit (low voltage). They shut off compressor if abnormally high or low pressures are present in the refrigeration circuit. Depending on unit model, you may find a low- and/or
Located on suction line of condensing unit only, the