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TrueSTEAM Humidification System
11 69-2285EFS—03
BASIC WIRING
Wire the TrueSTEAM according to the diagram that applies to your humidity
control.
Dry-contact mechanical humidistat wiring.
TrueIAQ wiring.
M28689
R
GF G
G
GT
C
HUM
HUM
R
C
W
Y
Y W C R
ENSURE THERMOSTAT ISOLATES Y FROM G.
ALL HONEYWELL PRESTIGE, VISIONPRO IAQ,
VISIONPRO, AND FOCUS PRO THERMOSTATS
DO THIS.
1
CONVENTIONAL
THERMOSTAT
H8908
1
DIP4
M28690
G
GT
R
C
W
Y
Y W C R
IN TRUEIAQ INSTALLER SETUP, SET ISU # 25 TO 3.2
2
HUM
HUM
HUM
HUM
24V
24V
R
C
R
GF
C
ENSURE THERMOSTAT ISOLATES Y FROM G.
ALL HONEYWELL PRESTIGE, VISIONPRO IAQ,
VISIONPRO, AND FOCUS PRO THERMOSTATS
DO THIS.
1
1
CONVENTIONAL
THERMOSTAT
TrueIAQ
DIP4
WIRING–GETTING STARTED