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iO HVAC Controls T-32-P2 Universal Thermostat Instruction Manual
RESETTING THE TIME DELAYS
The T-32-P2 incorporates a number of time delays
which can be disabled during testing by setting
CD=1 in the Advanced Installer menu. After exiting
the menu, a wrench icon will flash on the LCD. This
is to remind you that once testing is completed, the
time delays need to be re-initiated by setting CD=0
in the Advanced Installer menu.
After testing the thermostat, change CD=1 to CD=0
in the Advanced Installer menu. This will be
confirmed when the flashing wrench icon no longer
appears on the LCD.
FACTORY TEST MODE
The T-32-P2 contains a simple factory Test Mode
that can confirm relay outputs, slide switch
configuration along with a factory default reset.
TESTING FAN OPERATION
Pres the MODE button until the word OFF is
displayed on the LCD. Press the FAN button and
the word Fan On will appear. After a brief moment,
the internal fan relay will energize and the fan icon
will appear and rotate.
TS=0 - Factory Test Mode is OFF
TS=1 - Displays system configuration code
based on slide switch settings,
(for factory use only).
TS=2 - Cycles each relay on and off in an
endless loop. Equipment should be
TESTING CONVENTIONAL HEATING AND
COOLING OPERATION
disabled when performing this test.
TS=3 - Reset software to factory defaults.
Press Fan button to initiate.
Press the MODE button until Mode Heat appears
on the LCD. Use the ( ) button and raise the
setpoint a few degrees above the space
temperature. The heating relay will energize and
the word Heat will change to Heating. If the
thermostat has been configured for multi-stage
operation, raise the setpoint further and the second
stage heating relay will energize. A period ( . ) will
be displayed after the word Mode.
ADAPTIVE RECOVERY
Adaptive Recovery is only available in
programmable mode (Sw6=ON and OS=1). The
Adaptive Recovery function of the T-32-P2 permits
the user to program a time that a desired set
temperature is required. The thermostat then
calculates the most energy efficient time to bring on
the equipment to reach the setpoint at the
designated time. This calculation involves a
complex control algorithm that compares the space
temperature distance from setpoint, and rate of
recovery history. “RECO” flashes on the LCD when
Adaptive Recovery is active.
Press the MODE button until Mode Cool appears
on the LCD. Use the ( ) button and lower the
setpoint a few degrees below the space
temperature. The cooling and fan relays will
energize and the word Cool will change to
Cooling. If the thermostat has been configured for
multi-stage operation, lower the setpoint further
and the second stage cooling relay will energize. A
period ( . ) will be displayed after the word Mode.
BASIC TROUBLE SHOOTING
POSSIBLE FAULT AND REMEDY
SYMPTOM
TESTING HEAT PUMP OPERATION
No LCD Display
Remove thermostat from subbase and
check for 24 volts across ‘24’ and ‘24C’.
Make sure factory jumper is between ‘R’ and
‘24’. If no voltage, check voltage on HVAC
for 24 volts at HVAC system terminals ‘R’
and ‘C’. If no voltage, fault is equipment
related. If voltage, fault could be in wiring.
When the T-32-P2 is configured for heat pump
operation, testing is the same as for a conventional
heating and cooling system with the exception that
the fan relay is energized on a call for both heating
and cooling. Emergency Heat mode is only
active when the thermostat is set to H3=EH,
H3=FF or H3=AL in the Advanced Installer
menu. When the thermostat is placed in the
emergency heat mode, E. Heat will be displayed
on the LCD. When the W2 relay is energized E.
Heating will be displayed on the LCD.
“Locked” appears on This is not a fault. If an outdoor sensor is
the LCD and Heating being used, it could be preventing heating or
or Cooling will not
operate.
cooling calls based on the outdoor air
temperature either being about or below the
HO and CO value which may require
changing in the Advanced Installer menu.
Temperature display
inaccurate.
Air from the wall cavity may be leaking into
the rear of the thermostat. Seal holes in the
wall to prevent air infiltration. The
When the thermostat is in the heat pump mode,
the reversing valve is energized with a cooling call
‘O’ or heating call ‘B’ and remains energized until
there is an opposite call or if after 30 minutes there
is no call, the reversing valve will de-energize.
temperature sensor might be folded back
inside the thermostat and is not being
exposed to the room temperature. Carefully
move the sensor head so that it is just
behind the sensor opening in the case.
External influence from appliances, lighting
or drafts may be affecting temperature
accuracy. Move lamps or other sources of
abnormal temperature influence away from
the thermostat.
10
| General | Details |
|---|---|
| Name | iO HVAC Controls T-32-P2 Universal Thermostat Instruction Manual |
| Make | iO HVAC Controls |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.36 MB |
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