Venstar T1900 Installation - Manual (Page 20)

CK1 and CK2 terminals wired to a Time Clock
DRY CONTACT SWITCH - The terminals are ‘normally open’ (or may be programmed for
normally closed operation, see page 17.2 of the Owner’s Manual). Closing or
completing the circuit will cause the thermostat to do one of the following:
1) If Vacation is selected in step #41 of the Advanced Setup (see page 17.3 of the
Owner’s Manual), when the dry contact is energized the thermostat will be forced into
Vacation mode (see Section 20 of the Owner’s Manual).
2) If Service Pan is selected, when the dry contact is energized the thermostat will lockout
Y1 (compressor) and write Service Pan on the display.
Page 5.8
5
Y1
G
R
C
MISC2
CK1
CKGND
W1/O/B
MISC1
RS+5
RS1
RSGND
W2
RS2
MISC3
12 11
10
9
8
7 6 5
4
3
2
1
For instructions on wiring the optional Remote and Outdoor
Sensors, please see page 16.2 of the Owner’s Manual