Venstar T1900 Installation - Manual (Page 18)

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
2nd Stage Cooling Y
2
W
3
RS2
3rd Stage Heat
or Dual Fuel
MISC3
Sprinkler System
W3
PROG
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
Page 5.6
5
Adding a (MISC1), Sprinkler System (MISC2),
and 3rd Stage of Heating or Dual Fuel Applications (MISC3)
2nd Stage of Cooling