607C-- -- A
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| STD DEHUM |
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| LOW | COM |
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| QC5 |
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| QC4 | QC3 |
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| KZ |
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| KL | QCR | |
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| DCR | |
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| R13 | C8 | R11 | Q1 |
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| C | CDM/C | ||
07 | 09 | 0L0 | 08 |
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ALO |
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| Q3 |
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| AL2 | 24VAC/R |
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| C9 | C4 |
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| G1 | RL | |||
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| G2 |
| 3AMP | |
QIL | Z2 | 06 | 04 |
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| A7 | R9 | AB | A15 |
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| C0 | F1 |
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| C3 |
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| R4 | RL4 | |
D5 | D3 |
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| C7 |
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| JWZ |
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P3 |
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| R2 | JW5 |
| R3 | R5 | R6 |
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| P2 | JW3 |
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| QCB |
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SDL |
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| Y |
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| R | W2 Y |
| C |
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| W3 W3 W2 W2 C | ||
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| P1 |
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| W3 W2 | G | C | R |
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| DH | Y |
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A09059
Fig. 16 - Interface Fan Board (IFB)
ACCUMULATOR | COMPRESSOR |
OUTDOOR COIL | INDOOR COIL |
TXV in Bypass
Position
LCS
HP S
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| Metering |
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| LEGEND | Position |
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| HPS – High Pressure Switch |
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| LCS – Loss of Charge Switch |
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| Accurater®Metering De vice |
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| Arrow indicates direction of flow |
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| C03012 | |
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| Fig. 17 - Typical Heat Pump Operation, Heating Mode |
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Step 3 — Defrost Control | 60 minutes). To initiate a forced defrost, two options are available | ||||||||||||
Quiet Shift | depending on the status of the defrost thermostat. |
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If defrost thermostat is closed, | |||||||||||||
Quiet Shift is a | |||||||||||||
by placing a | flat head | screw driver in | between for | 5 sec and | |||||||||
occasional noise that could be heard at the start of defrost cycle and | |||||||||||||
releasing, to | observe a | complete defrost | cycle. When | the Quiet | |||||||||
restarting of heating cycle. It is selected by placing DIP switch 3 | |||||||||||||
Shift switch is selected, compressor will be turned off for two 30 | |||||||||||||
(on defrost board) in ON position. | |||||||||||||
sec intervals during this complete defrost cycle, as explained | |||||||||||||
When Quiet Shift switch is placed in ON position, and a defrost is | |||||||||||||
previously. When Quiet Shift switch is in factory default OFF | |||||||||||||
initiated, the following sequence of operation will occur. Reversing | position, a normal and complete defrost cycle will be observed. | ||||||||||||
valve will energize, outdoor fan will turn off, compressor will turn | If defrost thermostat is | in open position, and speedup pins are | |||||||||||
off for 30 sec and then turn back on to complete defrost. At the | |||||||||||||
shorted (with a flat head screw driver) for 5 sec and released, a | |||||||||||||
start of heating after conclusion of defrost reversing valve will | |||||||||||||
short defrost cycle will be observed (actual length is dependent | |||||||||||||
upon the selected Quiet Shift position). When Quiet Shift switch is | |||||||||||||
outdoor fan will stay off for 40 sec, before starting in the Heating | |||||||||||||
in ON position, the length of defrost | is 1 minute (30 sec | ||||||||||||
mode. | |||||||||||||
compressor off period followed by 30 sec of defrost with | |||||||||||||
Defrost | |||||||||||||
compressor operation). On return to heating operation, compressor | |||||||||||||
The defrost control is a time/temperature control which includes a | will again turn off for an additional 30 sec and the outdoor fan for | ||||||||||||
40 sec. When the Quiet Shift is in OFF position, only a brief 30 | |||||||||||||
between defrost cycles of 30, 60, 90, or 120 minutes (factory set at | sec. cycle will be observed. |
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