Venstar T1900 Installation - Manual (Page 9)

Page 3.3
W3 JUMPER SETTING
If the jumper for MISC1, MISC2, or MISC3 is set to W3, the corresponding MISC
screw terminal on the backplate will control a third stage of heat.
3
PROG JUMPER SETTING
If the jumper for MISC1, MISC2, or MISC3 is set to PROG,
terminal on the backplate will control a pilot relay or other accessory. the corresponding MISC screw
The 3rd Stage of Heat is turned on when:
(A) The 1st and 2nd stages have been on for the time required (steps 27
and 28, page 14.6). It is adjustable from 0-60 minutes and the default
is two minutes.
(B) The temperature from the setpoint is equal to or greater than: the set-
point plus the 1st stage deadband (step #24, 14.5), plus the 2nd stage
deadband (step #25, 14.5) plus the 3rd stage deadband (step #26,
14.5). This 3rd stage deadband is adjustable from 0-10 degrees and
the default is two degrees.
Explanation of Jumper Settings
And
Heat
Setpoint
Cool
Setpoint
Deadband Deadband Deadband Deadband Deadband
db 1 db 1 db 2 db 2 db 3
(adj. 1-6 ) (adj. 0-10 ) (adj. 0-10 ) (adj. 0-10 ) (adj. 1-6 )
1st Stage
turn on
2nd Stage
turn on
3rd Stage
turn on
1st Stage
turn on
2nd Stage
turn on
Heating Cooling
TEMPERATURE DECREASE INCREASE
W3 MULTI-STAGE OPERATION EXPLAINED - SECTION 14 of the Owner’s
Manual
This jumper setting allows the MISC outputs to control a pilot relay by time,
temperature, or a signal from the Internet/Phone. The following are three
possible scenarios:
By Time: A device that requires a start and stop time. An example
of this would be an exterior lighting system that needed to be
energized every day between the hours of 8pm and 1am.
By Temperature: An exhaust fan that needs to energize whenever
the temperature from RS2 rises above 90 degrees F.
By Remote: Remotely arming a security system through the web or phone.
PROGRAMMABLE OUTPUT - SECTION 15 of the Owner’s Manual