Venstar T1900 Installation - Manual (Page 19)

HP GAS
B O
ELEC GAS (F A N )
W1
Y1
G
R
C
MISC2
CK1
CKGND
W2
MISC1
RS2
RSGND
MISC3
RS+5
Rs1
W3 PROG HUM DEHUM
MISC3 MISC2 MISC1 Y2 (MISC1
ONLY)
INSTALL HUMIDITY MODULE WITH SENSING ELEMENT OUTWARD
1 2 4 6 8 X Z
1 5 7 9 Y 3
H U M N O H U M
Y1
G
R
C
MISC2
CK1
CKGND
W1/O/B
MISC1
RS+5
RS1
RSGND
W2
RS2
Adding a Humidification System (MISC1) and Dehumidification System (MISC2)
MISC3
Dehumidification
System
Humidification
System
HUM
NO HUM
Page 5.7
5
W3
PROG
HUM
DEHUM
MISC3 MISC2
Y2
(MISC1
ONLY) MISC1