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TC170 THERMOSTAT
READ THESE INSTRUCTIONS CAREFULLY BEFORE
ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS
THERMOSTAT.
Failure to observe safety information and comply with instruc-
tions could result in PERSONAL INJURY, DEATH AND/OR
PROPERTY DAMAGE.
To avoid electrical shock or damage to equipment, disconnect
power before installing or servicing and use only wiring with
insulation rated for full thermostat operating voltage.
Before installing this control, the Voltage Selection Switch must
be placed in the correct position. See instructions.
To avoid potential re and/or explosion do not use in potentially
ammable or explosive atmospheres.
Retain these instructions for future reference. This product,
when installed, will be part of an engineered system whose
specications and performance characteristics are not designed
or controlled by PECO. You must review your application and
national and local codes to assure that your installation will be
functional and safe.
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WARNING
CAUTION
Use copper wire only, insulate or wire nut all unused leads.
Care should be used to avoid electrostatic discharge to the T170
thermostat.
This unit has conguration jumpers. You may need to recongure
this thermostat for your application. See page 3.
MOUNTING THE THERMOSTAT
Thermostat mounts to a 4x4 box with a 2x4 mud ring.
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INSTALLATION
1. This thermostat is a 24 VAC only control. Leave the Voltage Selec-
tion Switch in the 24 VAC position for proper operation. Failure to
select the correct voltage will result in thermostat malfunction or perma-
nent thermostat damage.
2. Connect wires using the wiring diagram. Wire nut off all unused wires.
All connections must be located in the outlet box.
3. Install the T170 base with the two furnished mounting screws to
a standard 4 x 4 x 2-1/8” square device box with a 2” x 4” mud ring
mounted horizontally. Tighten the screws evenly but do not over tighten.
4. To use a remote sensor on units with local sensing capability, remove
jumper JP-1 to disable local sensing. Failure to remove JP-1 will cause
improper operation of the thermostat with a remote probe installed.
5. Verify that the circuit board is rmly snapped into the cover and has
not been dislodged during handling.
6. Install the cover assembly. Press rmly to engage the cover locking
snaps.
7. Checkout: After wiring and installation is complete, energize the
system. Set fan to ON. Set the system button to AUTO, or available
selection. Using the UP arrow, adjust temperature above the ambient
temperature to cycle heating stage(s) on. Using the DOWN arrow adjust
the temperature below ambient temperature to cycle cooling stage(s)
on.
TYPICAL OPERATION
System Button Operation
OFF All thermostat outputs are off.
AUTO The thermostat automatically selects heating or cooling mode
depending upon the set point and room temperature. The ap-
propriate HEAT or COOL icon are illuminated if demand exists.
A 3°F dead-band is provided to prevent short cycling between
heating and cooling modes. After changeover, the control point
automatically shifts so that the control off point equals the set
point temperature.
COOL The thermostat operates as a cooling only thermostat.
HEAT The thermostat operates as a heating only thermostat.
Up/Down Arrow Button Operation
Up/Down arrows increased or decreased temperature.
Fan Button Operation
In ON the fan output is continuous. In AUTO the output cycles with
demand. Some models are available with Controlled Off and or Staged
Fan.
F/C Button Operation
This button toggles from Fahrenheit to Celsius.
Speed Button Operation
Some models have a Speed button instead of a F/C button. Fan speed
is determined by manual selection of HI or LO. Holding this button in
for 5 seconds will toggle the displayed temperature from Fahrenheit to
Celsius.
© COPYRIGHT 2008 PECO, INC. ALL RIGHTS RESERVED. P/N 69289 3220-2083 REV 0 PAGE 1
CAUTION
2x4 Mud Ring
T170 Base
T170 CoverAssembly
All wiring connections must be made
inside the electric box or the T170
maybedamaged.
Cover Locking Snaps
(Both Sides)