Page 11
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.
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
Temperature
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
Ye s
Note 1 Activation delay
120 seconds if one heat stage is activated or deactivated
No
No
No
No
No
Ye s
Ye s
Ye s
Ye s
Ye s
Change in Heat
demand from
room thermostat?
Adjust Target Discharge Air
Temperature
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 14. EVENHEAT Operation (2 of 2)
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