User Guide

ManualsBrandsBarber Colman ManualsHVAC Replacement PartsStrap-On Thermostat w/ Enclosure (50-210°F)

Application

This thermostat is used to either open or close

electrical circuits when the temperature of a pipe

exceeds the thermostat setting. The common-normally

closed circuit is often used on unit heater installations

to prevent operation of the fan unless heat is actually

available. The common-normally open circuit is usually

used for control on hot water boilers.

Specifications:

Setpoint adjustment range: 50 to 210°F (10 to 99°C)

Differential: 10°F (5.5°C)

Ambient Temperature Limits:

Case: Storage: -40 to 160°F (-40 to 71°C)

Operating: 40 to 140°F (-40 to 60°C)

Bulb: 260°F (127°C) maximum

Locations: NEMA Type 1

Electrical Switch: Heavy duty snap-acting SPDT

Switch Ratings: See Table-1

Connections: Coded screw terminals

Case: Steel with 1/2 in. to 3/4 in. conduit opening on bottom

Mounting: On up to 4 in. (102 mm) O.D. pipe with metal

strap and spring provided

Dimensions: See Figure-1

Figure-1

Table-1 Switch Ratings

SPDT Switch Ratings (AC only)

Voltage

Vac

FLA

Amps

LRA

Amps

Pilot Duty

120 16 96 360

240 8 48 360

Pre-Installation

The thermostat is shipped with a metal strap and

spring, which will fit supply lines up to 4-inch (102 mm)

O.D.

Before installing the thermostat, look for bent or broken

parts.

Installation

Requirements

The thermostat can be mounted in any position on a

smooth clean pipe. Be sure pipe is free of rust, scales,

or insulation material.

Procedure

1. Insert the spring loops into the holes provided in

the strap and in the side of the housing

2. Wrap the strap around the pipe and thread

through the opening provided in the housing

3. Push the device against the pipe to compress the

foam spacer until the bulb is 1/4 in. (6 mm) from

the back of the housing.

4. Pull the strap tight and bend to lock the device in

place.

5. Clip off or bend back the excess strap.

TC-2974

Strap-On Thermostat

General Instructions

200

180

160

TC-2974

4-5/8"

(118 mm)

2-1/4"

(58mm)

(51 mm)

Conduit Opening

5/8"

(16mm)

Strap

Pipe

Summary of content (2 pages)

PAGE 1
TC-2974 Strap-On Thermostat General Instructions Application 100 80 1 6 0 0 60 120 140 18 This thermostat is used to either open or close electrical circuits when the temperature of a pipe exceeds the thermostat setting. The common-normally closed circuit is often used on unit heater installations to prevent operation of the fan unless heat is actually available. The common-normally open circuit is usually used for control on hot water boilers.
PAGE 2
Wiring The thermostat has one 1/2 in. to 3/4 in. (13 to 19 mm) conduit opening in the bottom of the housing. Make all electrical connections in accordance with the job wiring diagram and in compliance with national and local electrical codes. Device terminal coding, switch action, and wiring diagrams are shown in typical applications in Figure-2 and Figure-3. 3. The differential is factory set to provide the following switch action: a. At 5°F (2.8°C) above the setpoint, a commonnormally closed is made. b.