Evenheat Operation - Lennox 16B27 Manuallines

e h o
ven eAt perAtion
INPUTS
Room Thermostat Demand
Y1
Y1 + Y2
Y1 + W1 and/or W2
Y1 and Y2 + W1 and/or W2
W1 and/or W2
Heat pump first or second stage or electric heat demand will start the air handler
control indoor blower at CFM value based on tables found in installation
instructions.
Heat Pump and electric heat
Timer delays for
120 seconds
Target Discharge Air
Temperature Set at 85ºF
Heat Pump First Stage
Heat Pump First and Second
Stage
Heat Pump First Stage + First
Electric Heat Section (H1)
Heat Pump First and Second
Stage+ First Electric Heat Section
(H1)
First Electric Heat Section (H1)
Yes
demand?
No
One Stage
Figure 9. EVENHEAT Operation (1 of 2)
OUTPUTS
Target Discharge Air
Temperature Set at 100ºF
Heat Pump First Stage
Heat Pump First and Second Stage
+ First Electric Heat Section (H1)
tric Heat Section + Second Electric
Heat Section (H2) if number of
electric heater sections detected is
more than two.
Heat Pump First and Second Stage
ond Electric Heat Section (H2) if
number of electric heater sections
detected is more than two.
First Electric Heat Section (H1) +
Second Electric Heat Section (H2)
if number of electric heater sections
detected is more than two.
Increase target discharge air temperature by 15Fº
Last room thermostat Heat
up- staging action
A
Page 22
Target Discharge Air
Temperature Set at 115ºF/130ºF
Heat Pump First + First Electric
Heat Section (H1)
Heat Pump First and Second Stage
+ First Electric Heat Section (H1) +
Second Electric Heat Section (H2)
if number of electric heater sections
detected is more than two.
tric Heat Section (H1) Second
tected is more than two.
Heat Pump First and Second Stage
+ First Electric Heat Section (H1)
Second Electric Heat Section (H2)
if number of electric heater sections
detected is more than two.
First Electric Heat Section (H1) +
Second Electric Heat Section (H2)
if number of electric heater sections
detected is more than two.
Timer delays for 150
More than one stage
seconds