Lennox 16B27 Manuallines page 23

Note 1 Activation delay
120 seconds if one heat stage is or deactivated
150 seconds if more than one stage is activated or deactivated.
Yes
Delay Timer
No
Finished or last
change was up-
stage
Yes
Electric heat ON
Yes
W call with one
Electric Heat
Section ON
Adjust Target
No
Discharge Air
Temperature
Turn OFF Electric
Heat Section
EVENHEAT Operation
Start Timer Delay
(Note 1)
No
Change in Heat
demand from room
thermostat?
Stop Delay Timer
Increase heat demand.
Y1 (with or without Y2) +
W1 and W2
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
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)
Above
Discharge air temperature is
within target range?
Measured discharge air
temperature is above or below
target range?
Figure 10. EVENHEAT Operation (2 of 2)
Page 23
No
A
Activate Y2
Delay Timer
Finished or last
change was down-
stage
Yes
Y1 ON and Y2
OFF
No
More Electric Heat
available
Below
Yes
Turn ON one Electric
Heat section
NOTE — Optional Outdoor Thermostat (Wired
between R and W3) will lockout electric
elements 3, 4 and 5.
No
Yes
Adjust Target
Discharge Air
Temperature