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Connecting the Outputs
R - Hot Wire; one side of the control (20 - 30 VAC)
transformer. If two hot wires are present (as with RC and
RH) determine if they come from separate transformers.
The e-Stat must be installed on a single transformer
system.
G - Fan Wire.
W1 - First stage of heating.
Y1 - First stage of cooling.
When conventional rooftop equipment is selected, the
interstage differential is always 1.5 °F. With heat pump
switch #1 set to "ON", the interstage differential is 3.0 °F
for heating stages and 1.5 °F for cooling stages. (If using a
humidity sensor, interstage differential will increase during
cooling to compensate for high humidity conditions.)
C - Common or Neutral side of transformer. This must be
connected for the e-Stat to operate.
W2 - Second stage of Heat or Auxiliary heat with heat
pumps.
Y2 - Second stage of cooling.
O - This output will be active with a call for cooling.
Often used for heat pump reversing valve.
B - This output will be active with a call for heating.
(Connect O & B outputs as required by the HVAC
equipment.)
Note: Jump W1 and Y1 for heat pumps that have a single
compressor wire to bring the compressor on for both heating
and cooling.
A1, A2, A3 are dry contact relay terminals that may be used
for night shutdown of dampers or control of other equipment.
This is a separate relay with isolated contacts.
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