T7100D,E,F MICROELECTRONIC COMMERCIAL THERMOSTATS AND Q7100A,C,D SUBBASES
68-0163—3
13
Minimum-Off Timing
A minimum-off timer assures that the cooling compressor or
heat pump compressor does not come on again for at least
five minutes after it turns off. The minimum-off timer is
triggered when the compressor goes off and when the system
switch is changed. If the compressor turns off when the
setpoint is changed, then the minimum-off timer is triggered.
The minimum-off timer operates during the first stage of both
heating and cooling on the heat pump thermostat models and
during cooling only on the standard application models.
Emergency Heat (select models)
When the system is set for Emergency Heat, the auxiliary
heat is stage one and the compressor stages are locked off.
Depending on the model, the fan can be activated when
Emergency Heat is used.
Fan Control
The fan is on when these conditions are present (it can take
up to 20 seconds for the fan to turn on):
Fan On:
The fan is energized continuously.
Fan Auto:
The fan runs only with the heating and cooling
system.
Select models allow the installer the option of electric or
conventional heat fan operation in the Installer Setup. When
set for electric heat systems, the fan comes on at the same
time as the heat when energized by the thermostat. The fan is
energized by the plenum switch when set for conventional
heating system.
Override Temperature (select models)
The T7100 temperature settings can be overridden when using
the Override key, a remote setback timer, or a occupancy sensor.
When using the override feature, the temperature settings
change according to the Installer Setup 27 setting.
When the Override key (select T7100F models) is pressed,
the thermostat temporarily changes from the comfort setpoint
to the temporary setpoint by the amount set in Installer Setup
27. See Table 11. Pressing the key a second time cancels the
temporary setting.
The normal contact state (comfort setpoint) when using a
remote timer or occupancy sensor is closed. The temporary
contact state (temporary setpoint) is open.
NOTE:
Pressing the Override key at any time changes the
state of the contacts.
Table 11. Examples of Temperature Overrides.
Always check the display to determine if the thermostat is
controlling to the comfort, temporary or remote setpoint.
Temporary is displayed when the thermostat is operating at
the temporary setpoint.
System
Setting
Comfort
Setpoint
Installer Setup 27
Setting
Temporary
Setpoint
Heat
68°F
10°F
58°F
Cool
74°F
10°F
84°F
WIRING DIAGRAMS (FIG. 17-22)
Fig. 17. Typical hookup of Q7100A1044 in a one-stage
heat and one-stage cool conventional system.
Fig. 18. Typical hookup of Q7100C1024 in a one-stage
heat and one-stage cool heat pump system.
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
1
1
L1
(HOT)
L2
M4831A
HEAT
RELAY OR
VALVE COIL
COMPRESSOR
CONTACTOR
RC
O
G
X
W
COOL
DAMPER
SUBBASE
B
HEAT
DAMPER
Y
FAN
RELAY
RH
L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
1
M4833A
COMPRESSOR
CONTACTOR
FAN
RELAY
R
O
W
X
Y
X1
COOL
CHANGEOVER
VALVE
SUBBASE
1
B
HEAT
CHANGEOVER
VALVE
G
HEAT
RELAY
EQUIPMENT
MONITOR
