Lennox G21Q3-40 User Manual

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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 G21Q3-40 Specifications

General

Brand	Lennox
Model	G21Q3-40
Category	Industrial Equipment
Language	English