TABLE 23 - THERMOSTAT SIGNALS (THREE PHASE UNITS)
SIGNAL | STATE | BOARD FUNCTION | |
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“G” | ON | FAN INSTANT ON | |
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OFF | FAN INSTANT OFF | ||
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| FAN INSTANT ON | |
| ON | COMPRESSOR AND OUTDOOR FAN INSTANT ON (AFTER | |
| REVERSING VALVE ENERGIZED | ||
“G” & “Y” & “O” |
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| SYSTEM OPERATES IN COOLING | ||
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| OFF | COMPRESSOR AND OUTDOOR FAN INSTANT OFF | |
| FAN 60 SEC. DELAY OFF | ||
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| FAN INSTANT ON | |
| ON | COMPRESSOR AND OUTDOOR FAN INSTANT ON (AFTER | |
“G” & “Y” |
| SYSTEM OPERATES IN HEATING | |
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| OFF | COMPRESSOR AND OUTDOOR FAN INSTANT OFF | |
| FAN 60 SEC. DELAY OFF | ||
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| FAN INSTANT ON | |
| ON | HEATER BANK 1, 2 & 3 ELEC. HEAT INSTANT ON | |
“G” & “W” |
| HEATER BANK 4, 5 & 6 ELEC. HEAT 10 SEC. DELAY ON | |
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| HEATER BANK 4, 5 & 6 ELEC. HEAT INSTANT OFF | ||
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| OFF | HEATER BANK 1, 2 & 3 ELEC. HEAT SEC. DELAY OFF | |
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| FAN 10 SEC. DELAY OFF | |
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| FAN INSTANT ON | |
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| COMPRESSOR AND OUTDOOR FAN INSTANT ON | |
| ON | SYSTEM OPERATES IN HEATING | |
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| HEATER BANK 1, 2 & 3 ELEC. HEAT INSTANT ON | |
“G” & “Y” & “W” |
| HEATER BANK 4, 5 & 6 ELEC. HEAT 10 SEC. DELAY ON | |
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| COMPRESSOR AND OUTDOOR FAN INSTANT OFF | |
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| HEATER BANK 4, 5 & 6 ELEC. HEAT INSTANT OFF | |
| OFF | HEATER BANK 1, 2 & 3 ELEC. HEAT SEC. DELAY OFF | |
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| FAN 60 SEC. DELAY OFF | |
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| FAN INSTANT ON | |
| ON | HEATER BANK 1, 2 & 3 ELEC. HEAT INSTANT ON | |
“W” |
| HEATER BANK 4, 5 & 6 ELEC. HEAT 10 SEC. DELAY ON | |
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| HEATER BANK 4, 5 & 6 ELEC. HEAT INSTANT OFF | ||
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| OFF | HEATER BANK 1, 2 & 3 ELEC. HEAT SEC. DELAY OFF | |
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| FAN 10 SEC. DELAY OFF | |
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| MAINTENANCE | |
NORMAL MAINTENANCE |
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WARNING: Prior to any of the following maintenance proce- dures, shut off all power to the unit, to avoid per- sonal injury.
Periodic maintenance consists of changing or cleaning filters and general cleaning of the outdoor coil.
FILTERS - Inspect once a month. Replace Disposable or clean Permanent Type as necessary. DO NOT replace Per- manent Type with Disposable.
MOTORS - Indoor and outdoor fan motors are permanently lubricated and require no maintenance.
OUTDOOR COIL - Dirt should not be allowed to accumulate on the outdoor coil surface or other parts in the air circuit. Cleaning should be as often as necessary to keep the coil clean. Use a brush, vacuum cleaner attachment, or other suitable means. If water is used to clean the coil, be sure that the power to the unit is shut off prior to cleaning.
CAUTION: Exercise care when cleaning the coil so that the coil fins are not damaged.
Do not permit the hot condenser air discharge to be obstructed by overhanging structures or shrubs.
Unitary Products Group | 17 |