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When holiday is active and the OCCUPIED button is
pressed, the temporary hold timer is set for two hours, the heat
and cool set points change to the occupied settings, the humidity
control will use the "normal" (not holiday) settings and the fan
will run according to the setting specified by the installer in con-
figuration Option 36.
If the remote indoor temperature sensor with override (part
no. 33ZCT55SPT) is used, it will function the same as the local
occupied button except that the button press will be inactive if
the thermostat is in HOLD. The remote occupied button is locat-
ed on the left side of the sensor. Press and hold the remote occu-
pied button for at least two seconds but not longer than five sec-
onds to request an unoccupied override.
Timers
FIVE-MINUTE COMPRESSOR TIMEGUARD —
timer prevents compressor from starting unless it has been off for
at least 5 minutes. It can be overridden for 1 cycle by simultane-
ously pressing the OCCUPIED and UP buttons.
CYCLE TIMER — Based on the selection of 4, 6, or 8 cycles
per hour, this timer is set to 15, 10 or 7.5 minutes. This time must
elapse from the start of one cycle before another cycle can start.
It serves to impose the cycles per hour limits. It can be defeated
for one cycle by simultaneously pressing the OCCUPIED and
UP buttons.
TEN-MINUTE STAGING TIMER — In multistage heating or
cooling, this timer prevents any higher stage from turning on un-
til the preceding stage has been on for 10 minutes. When staging
between compressor and auxiliary heat, the time is configurable
via Option 17. This timer is overridden if temperature error is
greater than 3° F (1.7° C) (usually due to a large change in de-
sired temperature) and equipment stages up in 60-second in-
tervals.
THREE-MINUTE MINIMUM ON TIME — In normal oper-
ation, when a stage turns on, it will not turn off for a minimum of
3 minutes. If the set point is changed, this timer is canceled, al-
lowing the equipment to turn off immediately when the demand
is removed.
Heat/Cool Set Points (Desired Temperature) —
A minimum difference of 1° F (0.5° C) and maximum of 10° F
(5.5° C) is enforced between heating and cooling desired tem-
peratures. This is done by allowing one setting to "push" the
other, to maintain this difference. This difference is adjustable
via configuration Option 11.
Equipment On Indicators —
is on, a COOL ON icon is displayed. While cooling equipment
operation is delayed by the time guard or cycle timer, COOL ON
will flash. The same is true for HEAT ON icon.
During second stage compressor operation a "2" will be dis-
played with the HEAT ON or COOL ON icon. When the W is
energized in a heat pump or emergency heat is available (Option
35 = On) and O/W2 is energized in an AC system, the "auxiliary
heat on" icon will be displayed.
Humidification and Dehumidification Indica-
When the display module door is closed, the humidifi-
tors —
cation icon will be displayed when humidification is active. The
dehumidification icon will be displayed when dehumidification
is active.
This function is only available on model 33CS2PPRH-03
thermostats.
®
Hybrid Heat
Dual-Fuel System Operation —
configure the thermostat for Hybrid Heat operation, set Option
01 to hh. Configure Option 08, Auxiliary Heat Lockout, to a
value that prevents gas heat operation above a specified outdoor-
air temperature. Configure Option 09, Heat Pump Lockout Tem-
perature, to a value to prevent compressor heating operation
below a specified outdoor-air temperature.
This
When cooling equipment
To
13
When the outdoor-air temperature is below the heat pump
lockout temperature, the heat pump will not be energized. The
gas heat source will be used to satisfy the heating demand. If the
heat pump is already energized when the outdoor-air tempera-
ture drops below the heat pump lockout temperature, the heat
pump will continue to operate until the heating demand is large
enough to request gas heat operation.
When the outdoor-air temperature is greater than or equal to
the heat pump lockout temperature, the heat pump will be used
to satisfy the heating demand. If the heat pump capacity is not
sufficient, gas heat operation will be used unless outdoor-air
temperature is greater than auxiliary heat lockout temperature.
During Hybrid Heat system heating, a defrost signal will be
considered valid if the compressor output (O) is energized and
the defrost signal has been active for less than 15 consecutive
minutes. Any defrost signal present for longer than 15 minutes
will be considered invalid. Hybrid Heat systems will use this in-
put to detect that defrost is in progress and energize the auxiliary
heat to provide occupant comfort during the defrost cycle and
finish the heating cycle with the auxiliary heat when the defrost
cycle terminates.
The Hybrid Heat function is only available on model
33CS2PP2S-03 thermostats.
When auto changeover mode is se-
Auto Changeover —
lected, a change from heat to cool (or vice versa) will not occur
until an opposite mode demand has existed for 10 minutes. If the
set point is changed, then the 10-minute requirement is ignored.
Emergency Heat Mode —
ured as a heat pump and emergency heat is selected, all Y signals
are locked out, and W becomes energized upon a call for heat.
When the control is configured as an AC and emergency heat is
selected, the W signal is locked out and O/W2 becomes ener-
gized upon a call for heat.
Dry Contact/Economizer Output —
can be used for control of an auxiliary device. The dry contact
may be configured to be closed for a specific number of minutes
per hour for each period of the program schedule. This can be
used to operate a ventilator, damper, system fan, or other auxilia-
ry device. There are two terminals, D1 and D2. When configured
as a dehumidification output, the dry contact can operate cooling
equipment capable of dehumidification function. For dehumidi-
fication control, 24 volts is applied from Rc to the dehumidifier
through relay contacts D1 and D2. A separate jumper wire is
needed between Rc and one dry contact terminal (such as D1).
If timed control of the system fan is required, the dry contact
can be used for this function. For fan control, 24 volts is applied
from Rh to G through relay contacts D1 and D2. A separate
jumper wire is needed between Rh and one dry contact terminal
(such as D1).
If it is desired to operate an economizer or other ventilation
device, the D1 and D2 terminals can be connected directly to the
equipment. This will provide a dry closed contact for the speci-
fied number of minutes per hour. See Option 19.
If timed control of the fan is required, the dry contact can be
used for this function. The G terminal can be connected to one of
the dry contact terminals with the other terminal being connected
to Rc and/or Rh for timed control of the fan.
TROUBLESHOOTING
If the display module does not power up after power is ap-
plied, check the Rc/Rh and C terminals for 24 vac. If 24 vac is
present, check the voltage between Vg and V+. This voltage will
be approximately 12 to 20 vdc. If voltage is present, check the
polarity to make sure it is wired correctly. The display will not
power up if polarity is reversed.
When the control is config-
The dry contact
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