Everyday Thermostat Control (ETC)
The ETC board focuses on providing the quickest field install, start-up, and service possible.
Figure 29: ETC board component location
Table 56: ETC board components
Location
Label
Description
Function and comments
W1
Thermostat Connection
1st Stage Heat Command
W2
Thermostat Connection
2nd Stage Heat Command
Y1
Thermostat Connection
1st Stage Cool Command
G
Thermostat Connection
Indoor Fan Command
Y2
Thermostat Connection
2nd Stage Cool Command
X
Thermostat Connection
Alarm Indication (24VAC Rectified)
R
Thermostat Connection
24VAC Connection
24V
Thermostat Connection
No Connection
A
C
Thermostat Connection
24VAC Common ConnectionLimit
B
P4
For Internal Use Only
C
J10
No Connection
(For Future Use)
INSTALLATION MANUAL ZY SERIES 3 - 10 ton 60 Hertz R-410A
100
Johnson Controls Ducted Systems
Summary of Contents for ZY Series
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