affect thermostat operation.) If you are using existing mounting holes, or if holes drilled are too large and do not allow you to tighten subbase snugly, use plastic screw anchors to secure subbase.
6.Push excess wire into wall and plug hole with a fire- resistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.
TABLE 2. WIRE IDENTIFICATION LABELS
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
G | C | L | R | O | B | E1 | E2 |
G | C | L | R | O | B | E1 | E2 |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
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9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
Y1 | Y2 | W1 | W2 | W3 | S1 | S2 | S3 |
Y1 | Y2 | W1 | W2 | W3 | S1 | S2 | S3 |
9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
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!WARNING
DO NOT EXCEED MAXIMUM VOLTAGE OR CUR- RENT RATINGS. FIRE, PERSONAL INJURY, AND/ OR EQUIPMENT DAMAGE COULD RESULT.
!CAUTION
To prevent electrical shock and/or equipment damage, disconnect electrical power at the main fuse box until installation is complete. Verify power is off with a voltmeter.
NOTE
The following wiring diagrams show typical terminal identification and wiring. For proper installation, refer to the original manufacturers’ instructions.
O | B | Y1 |
| Y2 | G | ||||||||
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| CHANGEOVER |
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| COMPRESSOR |
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| ENERGIZED |
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| CONTACTOR |
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| IN HEAT |
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CHANGEOVER |
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| COMPRESSOR |
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| FAN | ||||||
ENERGIZED |
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| CONTACTOR |
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| RELAY | ||||||||
IN COOL |
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W1
HEAT
RELAY
STAGE 1
W2 | W3 |
HEAT
RELAY
STAGE 3
HEAT
RELAY
STAGE 2
THERMOSTAT
CONTROL
CIRCUIT
THERMOSTAT
RC
SYSTEM
HOT
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24 VAC |
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| 120 VAC |
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NEUTRAL
Figure 4. Typical wiring diagram for single transformer systems
4
