Peco TH-109 User manual

Thermostat Instruction Sheet

Peco TH-109 Two-Stage Thermostat

Parts List

Peco Two Stage Manual Thermostat (P/N: TH-109)

NOTE: All material used for installation should be approved, suitable and

installed properly for the intended application.

Installation Instructions

1. Remove cover of thermostat from base.

2. Disconnect the power source.

3. Locate in an area with good air circulation (no outside walls).

4. Install the thermostat approximately 5 feet above ﬂoor level.

5. Replace the cover.

Figure 1 • TH-109 Thermostat

Figure 2 • TH-109 Thermostat Wiring

TH-109 Speciﬁcations

Range: 40°-100°F (4°-38°C) heat/cool

Max Ambient Temp: 140°F (60°C)

Differential: 3°F Fixed

Operation: Two-Stage

Electrical Rating: 24-277 VAC

Contact Action: Opens on rise.

Dimensions: 7.34” x 3.46” x 4.89”

Additional Features: Two piece NEMA 4X plastic enclosure

with all exposed parts made of stainless steel, type 300 series

stainless coiled temperature sensing bulb, two SPDT switches,

UL listed and CSA certiﬁed.

WARNING

To avoid electrical shock or damage to

equipment, disconnect all power before

installing or servicing.

Ensure the 1/2-inch conduit opening on the end of

the enclosure is installed downward. With cover and

NEMA 4X conduit ﬁttings (not included) properly

installed, the enclosure will meet NEMA 4X rain-

tight ratings. NOTE: A drip-loop should be provided

to prevent water and other liquids from entering the

thermostat housing. Failure to use suitable watertight

connections could result in thermostat failure.

Violet

Pink

Green

Blue

Brown

Black

Red

PowerHI

To unit

For use in wet or humid environments where water tightness is required

WARNING

To prevent overheating or ﬁre, use this control

as an operating or regulating thermostat.

ALWAYS USE A BACKUP CONTROL OR

ALARM if a control failure could cause the

controlled appliance to overheat or could cause a ﬁre.

Reference the heater

speciﬁc installation

and operation manual

for ﬁeld wiring.

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