SimpleComfort
®
2811 Electronic Thermostat Conversion to:
Lennox HP19 and HP20 Heat Pump Systems
SC
2811
Electronic Thermostat
24 VAC, return
24 VAC, common
Reversing valve (cooling mode)
Compressor contactor
2nd stage heating circuit (sequencer 1)
Fan contactor circuit
Emergency heating circuit
(capped)
Note 1:
E terminal on PCB capped
R
C
W1
O/B
Y1 W2 Y2
G
W3
V-VR
X
R
M
Y
F
E
Lennox HP19 and HP20
Low Voltage Terminal Board
