Installation (continued)
5.Install the required transformer selected from Table 1
– DO NOT USE the HVAC equipment transformer to power the control panel. Refer to the instructions provided with the transformer.
18 AWG thermostat wire minimum recommended.
Sizing the Transformer:
The system requires approximately 10 VA for the control panel and thermostats and 10 VA for each damper. The size of the transformer will depend on the greatest number of dampers that could be energized at any given time (at least one zone’s dampers will not be energized during a heating or cooling call when using power close, spring open dampers). The size of the transformer must not exceed 75VA. If the value is greater than 75VA, some dampers will need to be powered by a separate transformer – refer to Field Wiring Damper Diagram 2 on page 6.
For instance, if you have 3 dampers, then you would require 10VA for the system, 20VA (10VA X 2) for the dampers for a total of 30VA, so catalog number 10P17 would be an adequate transformer size at 40VA.
TABLE 1 – TRANSFORMERS
Part Number | Size | Voltage Description |
|
|
|
10P17 | 40VA | |
|
|
|
10P87 | 50VA | |
|
|
|
12P61 | 75VA | |
|
|
|
83P74 |
| 4" Square Electrical Box |
|
|
|
The transformers listed in this chart include a plate mount for a 4" square electrical box.
6.Install the thermostats. Refer to the instructions provided with the thermostat.
Any
18 AWG thermostat wire minimum recommended.
TABLE 2 – THERMOSTAT REQUIREMENTS
Type | Terminals | Recommended | |
Thermostat | |||
|
| ||
|
|
| |
|
| • SignatureStat 1H/1C | |
HEAT/COOL | R, C, W, Y, G | (51M26) | |
|
| • Elite 1H/1C (49M55) | |
|
|
|
Thermostat Terminal | Function |
|
|
R | 24 VAC Hot |
|
|
C | 24 VAC Common |
|
|
W | Heat |
|
|
Y | Cool |
|
|
G | Fan |
|
|
7.Install the dampers. Refer to the instructions provided with the damper.
18 AWG thermostat wire minimum recommended.
Page 4
