hREAD THESE INSTRUCTIONS CAREFULLY BEFORE
ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS
THERMOSTAT.
hFailure to observe safety information and comply with instructions
could result in PERSONAL INJURY, DEATH AND/OR
PROPERTY DAMAGE.
hTo avoid electrical shock or damage to equipment, disconnect
power before installing or servicing.
hTo avoid potential fire and/ or explosion do not use in potentially
flammable or explosive atmospheres.
hRetain these instructions for future reference. This product, when
installed, will be part of an engineered system whose
specifications and performance characteristics are not designed
or controlled by PECO, Inc. You must review your application and
national and local codes to assure that your installation will be
functional and safe.
WARNING
CAUTION
1Use Copper wire only, insulate or wire nut all un-used leads.
© COPYRIGHT PECO, INC. ALL RIGHTS RESERVED P/N 68817 3220-1465 Rev 0 Page 1
THERMOSTAT OPERATION
The T167 has a proportional band width of 2°F.
Temperature Control Range: 50 - 90 F
TA167: A HEAT-OFF-COOL system switch manually selects heating or
cooling mode. In the HEAT position only the heat output cycles with
demand. In the COOL position only the cool output cycles with demand. In
the OFF position heating and cooling output are off.
A ON-OFF system switch allow direct cycling between heat output and the
cool output and should be used for either heat only or cool only
applications. A changeover switch should be used if both outputs are used
on TA167 models with ON-OFF switches.
TB167: A ON-OFF system switch enables auto-changeover of heating
and cooling mode. In the ON position thermostat activates heating or
cooling output dependant upon the relationship between the set point and
the ambient temperature. Heat OFF to cool ON (or Cool OFF to Heat ON)
changeover is 3°F. After a changeover excursion has occurred the
thermostat will resume controlling at the set point. In the OFF position
heating and cooling outputs are off.
FAN: Fan Operation is switched on or off with the system switch. Manual
selection of up to three fan speeds are available on models with Fan
Switches. Fan circuitry is electrically separate from thermostatic circuitry.
1. Install the T167 with the two furnished mounting screws to a
standard 2" x 4" electrical box, 4-11/16" x 2-1/8" square device
box with a 2" x 4" adapter ring or to a 4" x 4" box with accessory
adapter plate.
2. For wall installations, mount the thermostat on an inside
wall approximately 5 feet above the floor. The location should
provide circulation at average room temperature. Avoid direct
sunlight or sources of hot or cold air in the room or wall.
3. Remove the knob and then the cover. Mount thermostat
base assembly to the outlet box using the screws provided,
tighten the screws evenly but do not over tighten. Connect
wires as noted.
4. The cover may limit system switch movement. Switch
position should not be changed after the cover is removed to
assure that the cover can be reinstalled.
5. To use a remote sensor on units that have local sensing
capability, remove jumper JP-1 to disable local sensing.
Failure to remove JP-1 will cause improper operation of the
thermostat.
6. Reinstall the cover assembly. Install cover locking screw
provided. Reinstall the knob.
7. Checkout:
After wiring and installation are complete, energize the system
and check the operation. Adjust the thermostat as necessary
to complete at least one cycle. Be sure the thermostat and all
other equipment are functioning correctly.
JP1
4
12123
1234
TB1
TB2
TB3
REMOVE JP1
WHEN USING A
REMOTE SENSOR
TERMINAL BLOCK
TB2
INSTALL COVER
LOCKING SCREW
TERMINAL BLOCK
TB3
TERMINAL BLOCK
TB1
LINE or LOW VOLTAGE
CONNECTIONS
LOW VOLTAGE
CONNECTIONS
TB 2
TB 1
TB 3
HEAT
0 - 10 VDC
COOL
0 - 10 VDC
VOLTAGE
RATING
FAN AND SYSTEM SWITCHES
INDUCTIVE
FLA LRA
RESISTIVE
AMPS
PILOT
DUTY
THERMOSTATIC
OUTPUTS
24 VAC NA NA NA 24 VA 0 - 10 VDC
120 VAC 5.8 34.8 6.0 125 VA NA
240 VAC 2.9 17.4 5.0 125 VA NA
277 VAC 2.4 14.4 4.2 125 VA NA
LO
MED
HI
L1
FAN
L2 OR
FAN NEUTRAL
24 VAC 1
24 VAC 2
REMOTE PROBE 2
REMOTE PROBE 1
24 VAC
XFMR
1
2
3
5
1
2
3
4
1
2
0-10 VDC THERMOSTAT
TA167 / TB167
5
4
NO CONNECTION
