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Discharge air temperature is
within target range?
W call with one
Electric Heat
Section ON
More Electric Heat
available
A
Measured discharge air
temperature is above or below
target range?
Electric heat ON
150 seconds if more than one stage is activated or deactivated.
EVENHEAT Operation
Start Timer Delay
(Note 1)
Stop Delay Timer
Increase heat demand.
Y1 (with or without Y2) +
W1 and W2
Discharge air temperature sensor setting on
air handler control will remain at set point. W1
demand will increase set point 15ºF. W2
demand will increase set point an additional
15ºF. (Total of 30ºF)
Delay Timer
Finished or last
change was up-
stage
Delay Timer
Finished or last
change was down-
stage
Above
Turn OFF Electric
Heat Section
Adjust Target
Discharge Air
Te mperature
Turn ON one Electric
Heat section
Adjust Target
Discharge Air
Temperature
NOTE — Optional Outdoor Thermostat (Wired
between R and W3) will lockout electric
elements 3, 4 and 5.
Y1 ON and Y2
OFF
Activate Y2
Below
No
Yes
Note 1 Activation delay
120 seconds if one heat stage is or deactivated
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Change in Heat
demand from room
thermostat?
Adjust Target Discharge
Air Te mperature
Heat Pump OFF
Discharge air temperature sensor setting on
the air handler control will remain at set point
on W1 demand and be increased 15ºF for W2
demand.
Heat Pump ON
Figure 10. EVENHEAT Operation (2 of 2)
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