Venstar T2800 Owner's Manual page 77

Explanation of Jumper Settings
Y2 JUMPER SETTING
If the jumper for MISC1 is set to Y2 the
second stage of cooling.
Y2 OPERATION - SECTION 13.4
Control up to two Cool stages.
The 2nd Stage of heat or cool is turned on when:
(A) The 1st Stage has been on for the time required (step #23,
page 13.6). It is adjustable from 0-60 minutes and the default
is two minutes.
And
(B) The temperature spread from the setpoint is equal to or greater
than: the setpoint plus the deadband (step #24, page 13.6), plus
the 2nd deadband (step #21, page 13.5). This 2nd deadband is
adjustable from 0-10 degrees and the default is two degrees.
Deadband
db 1
(adj. 1-6 )
Cool
Setpoint
TEMPERATURE
17
(continued)
MISC1 screw terminal on the backplate will control a
Cooling
Deadband
db 2
(adj. 0-10 )
1st Stage 2nd Stage
turn on turn on
INCREASE
Page 17.5