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.
You must review your application and national and local
codes to assure that your installation will be functional and
safe.
WARNING
hUse copper wire only, insulate or wire nut all un-used
leads.
hCare should be used to avoid electrostatic discharge to
the microprocessor.
hThis unit has configuration jumpers. You may need to re-
configure this thermostat for your application.
See page 2.
© COPYRIGHT 2005 PECO, INC. ALL RIGHTS RESERVED P/N 68837 3220-1470 Rev 0 Page 1
INSTALLATION INSTRUCTIONS
1. Install the T158 with the two furnished mounting screws to a
standard 4-11/16" x 2-1/8" square device box with a 2" x 4"
adapter ring.
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 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 shown in the
appropriate wiring diagram for your thermostat style.
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.
5. Remove the LCD plastic protective film. Reinstall the cover
assembly. Install the cover locking screw provided in the hole at
the left side of the control enclosure to complete the installation.
6. 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.
TA158
MICROPROCESSOR THERMOSTAT
On/Off Controller
CAUTION
LOW VOLTAGE
CONNECTIONS
LINE VOLTAGE
CONNECTIONS
WIRING DIAGRAM FOR ON/OFF OUTPUT
CONFIGURATION
FAN
L2 OR NEUTRAL
REMOTE PROBE
PIPE SENSOR
L1 (HOT)
LO
MED
HIGH
OR SINGLE SPEED FAN
24 VAC 1
24 VAC 2
SETBACK INPUT
24 VAC
XFMR
MAIN 1
SEC 1
MAIN 1
OUTPUT
SECONDARY
1 OUTPUT
VOLTAGE
RATING
FAN AND SYSTEM SWITCHES
INDUCTIVE
FLA
LRA
RESISTIVE
AMPS
PILOT
DUTY
THERMOSTATIC
SWITCHING
(Pilot Duty)
24 VAC
NA NA NA 24 VA
10 VA
120 VAC
5.8 34.8 6.0 125 VA
N.A.
240 VAC
2.9 17.4 5.0 125 VA
N.A.
277 VAC
2.4 14.4 4.2 125 VA
N.A.
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
ON - OFF
Off With Demand
On With Demand
OUTPUT
TA158 OPERATION
MAIN 1
(Terminal 10)
* Operation is determined by configuration. See Dip Switch Configuration Table.
Off at
Temperature
Demand
On at
Temperature
Demand
MAIN 2
(Terminal 12)
SECONDARY
1
(Terminal 11)
Summer: Off With
Heat Demand
Winter: Disabled
SECONDARY
2
(Terminal 13)
Summer: On With
Heat Demand
Winter: Disabled
N/A
N/A
N/A
N/A
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