INDOOR UNIT - AIR HANDLER | SUPPLIED JUMPER |
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| APRILAIRE MODEL | |
2ND STAGE | W2 | 8570 THERMOSTAT | |
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EMER. HEAT | W2 | ||
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1ST STAGE |
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W1 | RH | ||
AUX. HEAT | |||
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THERMOSTAT
CONFIGURATION SWITCH SETTINGS
(6) OPTIONAL – WIRE THE EVENT TRIGGERED OUTPUT (ETO)
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1ST STAGE COMP. | Y1 | RC |
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2ND STAGE COMP. | Y2 | G |
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Y1 |
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| FAN | G | Y2 |
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| RELAY | B |
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| C | O |
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| 24 |
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| VAC |
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| I+ AHC | |||
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L2 | 120 | L1 |
| I- | CONNECTION | |
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| VAC |
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| ZB |
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| 6504 | |
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| ZA |
| CONNECTION |
| DEFROST | W1 | GND | OUTDOOR (ODT) | ||
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1ST STAGE |
| Y1 | ODT |
| TEMPERATURE | |
COMP. |
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| IDS |
| SENSORS | |
2ND STAGE |
| Y2 | COM | EVENT | ||
| COMP. |
| NO |
| TRIGGERED | |
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| OUTPUT | |
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| NC |
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REV. |
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| (ETO) | |
VALVE |
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| SERVICE | L |
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| R |
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SINGLE | 1 |
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| ON | MULTI |
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HP | 2 |
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| HC |
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ELECT | 3 |
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| GAS |
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O | 4 |
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| B |
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SINGLE/MULTI – SET TO MULTI FOR TWO STAGE HEAT PUMP
ELECT/GAS - SET TO ELECT FOR ELECTRIC AUXILIARY HEAT, SET TO GAS FOR FOSSIL FUEL (DUAL FUEL) AUXILIARY HEAT
O/B – SET TO “O” IF HEAT PUMP REVERSING VALVE MUST BE ENERGIZED WHEN COOLING, SET TO “B” IF IT IS TO BE ENERGIZED IN HEATING
Terminals NO, COM and NC are the Normally Open, Common and Normally Closed outputs, respectively, of a relay that can be used to control auxiliary equipment. When the relay is on, a circuit is complete between NO and COM; when the relay is off a circuit is complete between NC and COM. The relay is programmed to be on or off, with each of the programming events. Examples of where this output might be used include:
• Turn on outdoor ventilation for |
programming periods of the day |
when the building is occupied and |
turn it off when unoccupied. |
• Have an electronic air cleaner turn |
on and off only when the building is |
occupied to reduce maintenance |
Figure 6 |
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| MODEL 8570 THERMOSTAT |
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USE ONLY TO | (shown with enclosure face removed) | ||
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CONTROL |
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LOADS | NC | C | |
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| COM | R | |
| NO | RC | |
| ZA | RH | |
| ZB | W1 | |
| I+ | W2 | |
| I- | G | |
| IDS | O/B | |
LOAD | ODT | Y1 | |
GND | Y2 | ||
2A MAX OPERATING CURRENT | |||
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3A MAX |
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CDiagram 8: Two-Stage Heat Pump
OUTDOOR UNIT - HEAT PUMP
- 16 -
time/cost. |
- 17 - |