T8011R PROGRAMMABLE HEAT PUMP THERMOSTAT
68-0196–1
9
CHECKOUT
CAUTION
Damage to Compressor Possible.
Operating at too low of an outdoor temperature
may cause compressor damage.
Do not operate cooling if outdoor temperature is
below 50
°
F (10
°
C).
Allow compressor to remain off for five minutes before
restarting. Refer to manufacturer’s recommendations.
Heating
1.
Slide the SYSTEM switch to Heat and the FAN switch
to Auto.
2.
Press and hold the
▲
key to raise the temperature
setting several degrees above the room temperature;
the heating equipment and fan should start.
3.
Press the
▼
key to lower the temperature setting below
the room temperature. Heating equipment should stop.
Cooling
1.
Slide the SYSTEM switch to Cool and the FAN switch
to Auto.
2.
Press the
▼
key to lower the temperature setting
several degrees below the room temperature; the
cooling equipment and fan should start.
NOTE:
If the unit does not start immediately, remember, the
thermostat has a built-in minimum off-time of five
minutes to protect the compressor. A flashing
or
indicates that the minimum off-timer is in effect.
3.
Press the
▲
key to raise the temperature setting above
the room temperature. Cooling system should shut down.
Fan
1.
Slide the SYSTEM switch to Off and the FAN switch to
On. The fan should run continuously.
2.
Slide the FAN switch to Auto. The system turns the fan
on and off with the equipment.
Make certain all equipment responds properly to the
thermostat.
Sequence of Operations
The Fan, Heat and Cool outputs are relay controlled. A loss of
ac power, or a change in the SYSTEM switch setting can
cause the outputs to turn off. Table 3 shows the sequence of
operations for the Fan and System settings.
Em. Ht.
With the system switch at Em. Ht., the thermostat controls the
emergency heat. On a call for emergency heat, the E, G and
L terminals are energized and an indicator points to Em. Ht.
on the display. L terminal is powered continuously while
system switch is in Em. Ht. In severe weather, the W2
terminal may also energize.
Minimum Off-Timer
A minimum off-timer in the T8011R assures that the
compressor does not come on again for at least five minutes
after it turns off. The minimum off-timer is triggered when the
compressor turns off and when the SYSTEM switch position
is changed. If the compressor turns off when the setpoint is
changed, the minimum off-timer is triggered. Power
interruption and power restoration also trigger the minimum
off-timer. The minimum off-timer operates in first stage
heating or cooling. A flashing
or
indicates that the
minimum off-timer is in effect. The minimum off timer is
bypassed during the optional system checkout. See page 6.
Table 3. Sequence of Operations.
FAN Switch Settings
SYSTEM Switch Settings
Call for Action
Energize Terminals
Display Icons
Auto
Cool
None
O
None
Auto
Cool
Cooling
O, Y, G
Auto
Heat
None
B
None
Auto
Heat
Stage 1 Heat
B, W1, G
Auto
Heat
Stage 2 Heat
B, W1, W2, G
Aux Ht
Auto
Em. Ht.
None
L
Em Ht
Auto
Em. Ht.
Stage 1 Heat
L, E, G
Em Ht
Auto
Em. Ht.
Stage 2 Heat
L, E, W2, G
Em Ht and
Aux Ht
a
O terminal is powered continuously in cooling, B terminal is powered continuously in heating and the L terminal is
powered continuously in emergency heat as a function of the SYSTEM switch position even without a call for heat or
cool.
