Lennox G21Q Series Unit Information

C
Page 97
G21V/GSR21V OPERATION SEQUENCE AND JUMPERS SUMMARY WITH VSP1 (HEATING)
MATCH UP JUMPER COMMENTS OR SEQUENCE
SingleStage Heating HB" to W2"
Blower operates on the high
speed heat tap during the heat
ing mode.
TwoStage Heating No Jumpers
Blower operates on the low
speed heat/cool tap during the
first stage of heating. Modula
tion control S78 will cycle the
unit. Blower operates on the
high speed heat tap during
second stage heating. Modula
tion control S78 may not cycle
the unit.
Harmony Heating No Jumpers
Blower operates on PWM
signal generated by Har
mony. Harmony overrides
blower speed taps. Blower
speed varies according to
zone demand.
TABLE 21
WIRING CONNECTIONS
W1
W2
R
GY1Y2
DS
HB
W1
W2
R
G
Y1
Y2
DS
C
HB
W1
W2
R
G
Y1
Y2
DS
C
HB
S1
THERMOSTAT
TB1 TERMINAL STRIP
S1
THERMOSTAT
TB1 TERMINAL STRIP
TB1 TERMINAL STRIP
ZONE
CONTROLLER
A1
HARMONY
FOR COOLING JUMPERS
SEE TABLE 22

Lennox G21Q Series Specifications

General

Brand	Lennox
Model	G21Q Series
Category	Industrial Equipment
Language	English