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 as noted in Table 3.
TABLE 3 — OPERATING VOLTAGE RANGE
TAP | RANGE |
|
|
240V | 253 – 216 |
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|
208V | 220 – 187 |
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|
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).
The standard unit includes a remote thermostat connection terminal strip. See Figures 13 through 19 for connection diagrams. Compatible thermostats are listed in Table 4.
TABLE 4 — WALL THERMOSTATS
Thermostat | Predominant Features |
|
|
| 3 stage Cool; 3 stage Heat |
HP or Conventional |
“W2” terminal is first stage electric heat (if equipped). First stage electric heat can be operated simultaneously with the heat pump operating.
“A” terminal is the ventilation input. This terminal energizes any factory installed ventilation option.
“W3” terminal is second stage electric heat. When “W3” terminal is energized, it locks out compressor operation to limit discharge air temperature and required branch circuit ampacity.
“D” terminal is the dehumidification mode (on models so equipped).
NOTE: For total and proper control using DDC, a minimum of 9 controlled outputs are needed when above 10KW Electric Heat is employed with ventilation, a total of 8 controlled outputs with below 10KW Electric Heat with Ventilation, 7 controlled outputs below 10KW Electric Heat with no ventilation, 7 controlled outputs with no Electric Heat, but with ventilation, and 6 controlled outputs with no electric heat and no ventilation. If Dehumidification Model & Vent, 10 controlled outputs are needed when above 10KW Electric Heat is employed with ventilation.
LOW VOLTAGE CONNECTIONS FOR DDC CONTROL
| Auto or Manual changeover | |
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| |
Carbon Dioxide Sensor with LCD for | ||
Sensor Readings | ||
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| |
| 3 Stage Heat, 3 Stage Cool, Prog/NonProg, HP or Conv, | |
Auto or Manual Changeover, Humidity Sensor w/ | ||
dehumidification, Motion Sensor w/ Intelligent Learning | ||
| ||
| Control, | |
|
| |
| 3 Stage Heat, 3 Stage Cool, Prog/NonProg, HP or Conv, | |
Auto or Manual Changeover, Humidity Sensor w/ | ||
dehumidification, CO2 Sensor, Motion Sensor w/ | ||
| ||
| Intelligent Learning Control, | |
|
| |
| 3 Stage Heat, 3 Stage Cool, Prog/NonProg, HP or Conv, | |
Auto or Manual Changeover, Humidity Sensor w/ | ||
dehumidification, Motion Sensor, Intelligent Learning | ||
| ||
| Control, | |
|
| |
| 3 Stage Heat, 3 Stage Cool, Prog/NonProg, HP or Conv, | |
| Auto or Manual Changeover, Humidity Sensor w/ | |
dehumidification, CO2 Sensor, Motion Sensor w/ | ||
| Intelligent Learning Control, |
Fan Only
Cooling Part Load
Cooling Full Load
HP Heating Part Load
HP Heating Full Load
HP Heating Full Load + Electric Heat (up to 10KW)
Heating with Bank #1 Electric Heat Only
Emergency Heat (Heat pump operation is negated for this condition)
Ventilation
Dehumidification *
*Models with Dehumidification Only
Energize G
Energize G, Y1
Energize G, Y1, Y2
Energize G, Y1, B/W1
Energize G, Y1, Y2, B/W1
Energize G, Y1, Y2, B/W1, W2
Energize G, W2
Energize G, W2, W3
Energize A
Energize G, D
LOW VOLTAGE CONNECTIONS
These units use a grounded 24 volt AC low voltage circuit. “G” terminal is the fan input.
“Y1” terminal is the compressor part load input. “Y2” terminal is the compressor full load input. “B/W1” terminal is the reversing valve input.
The reversing valve must be energized for heating mode.
“R” terminal is 24 VAC hot.
“C” terminal is 24 VAC grounded.
“L” terminal is compressor lockout output. This terminal is activated on a high or low pressure trip and condensate overflow trip by the electronic heat pump control. This is a 24 VAC output.
GENERAL
This unit is equipped with a variable speed ECM motor. The motor is designed to maintain rated airflow up to the maximum static allowed. It is important that the blower motor plugs are not plugged in or unplugged while the power is on. Failure to remove power prior to unplugging or plugging in the motor could result in motor failure.
CAUTION
Do not plug in or unplug blower motor connectors while the power is on. Failure to do so may result in motor failure.
Manual | |
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