FIGURE 9
COMMON WALL MOUNTING INSTALLATIONS
Closet Installation
Note: duct maybe in attic or below rafters as shown.
Rafters |
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Unit (outside) |
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Supply Air | Duct |
Finished Ceiling | Grille |
Wall Sleeve |
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Outside Wall | Return Air | Closet Wall | Closet Wall |
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| Raised Closet Floor | Grille |
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| Return Air |
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WIRING – MAIN POWER
Refer to the unit rating plate for wire sizing information and maximum fuse or “HACR” type circuit breaker size. Each outdoor unit is marked with a “Minimum Circuit Ampacity”. This means that the field wiring used must be sized to carry that amount of current. Depending on the installed KW of electric heat, there may be two field power circuits required. If this is the case, the unit serial plate will so indicate. All models are suitable only for connection with copper wire. Each unit and/or wiring diagram will be marked “Use Copper Conductors Only”. These instructions must be adhered to. Refer to the National Electrical Code (NEC) for complete current carrying capacity data on the various insulation grades of wiring material. All wiring must conform to NEC and all local codes.
The electrical data lists fuse and wire sizes (75° C copper) for all models including the most commonly used heater sizes. Also shown are the number of field power circuits required for the various models with heaters.
The unit rating plate lists a “Maximum Time Delay Relay Fuse” or “HACR” type circuit breaker that is to be used with the equipment. The correct size must be used for proper circuit protection and also to assure that there will be no nuisance tripping due to the momentary high starting current of the compressor motor.
The disconnect access door on this unit may be locked to prevent unauthorized access to the disconnect. To convert for the locking capability, bend the tab located in the bottom left hand corner of the disconnect opening under the disconnect access panel straight out. This tab will now line up with the slot in the door. When shut, a padlock may be placed through the hole in the tab preventing entry.
See “Start Up” section for important information on three phase scroll compressor start ups.
WIRING – LOW VOLTAGE WIRING
230 / 208V, 1 phase and 3 phase equipment dual primary voltage transformers. All equipment leaves the factory wired on 240V tap. For 208V operation, reconnect from 240V to 208V tap. The acceptable operating voltage range for the 240 and 208V taps are:
TAP | RANGE |
240 | 253 – 216 |
208 | 220 – 187 |
NOTE: The voltage should be measured at the field power connection point in the unit and while the unit is operating at full load (maximum amperage operating condition).
FIGURE 10
UNIT 24V TERMINAL BOARD
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| T7652H1000 THERMOSTAT | |||
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| BARD PART | ||
C | G | Rc Rh | Y1 | Y2 | B | W1 |
| L | A1 |
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| BARD PART | ||
C | G | R | Y1 | Y2 | B | W1 | W2 | E | W3/A1 |
C | G | R | Y | Y1 | B | W1 W2 | W3 | E L | DH O1 |
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| Factory Jumper |
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| UNIT LOW VOLTAGE | |||
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| TERMINAL BLOCK | ||||
Nine (9) wires should be run from thermostat subbase to the 24V terminal board in the unit. A nine conductor, 18 gauge copper
IMPORTANT
Only the thermostat combinations as shown above will work with this equipment.
TABLE 3
THERMOSTAT WIRE SIZE
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| Maximum |
Transformer |
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| Distance |
VA | FLA | Wire Gauge | In Feet |
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| 20 gauge | 45 |
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| 18 gauge | 60 |
55 | 2.3 | 16 gauge | 100 |
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| 14 guage | 160 |
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| 12 guage | 250 |
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Manual | |
Page | 15 of 25 |
