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Technical Instructions

Document No. 155-063P25

TH 134-1

April 1, 2005

TH 134 Pneumatic High And Low

Temperature Detection

Thermostats

Siemens Industry, Inc.

Description

The TH 134 Pneumatic High and Low Temperature Detection Thermostats have an

internal pneumatic switch that exhausts air from the line to a controlled device when the

temperature reaches the set point. They require manual reset to close the switch.

Features

• Snap acting pneumatic switch - no leakage prior to opening

• Easy to adjust settings

• Normally closed 0.022- inch (0.6 mm) diameter restrictor air valve bleeds to less than

2 psig (13.8 kPa) when supplied with 20 psig (138 kPa) through 40 scim (11 ml/sec)

restrictor when switch is open

• Barbed fitting for push-on connection of 1/4-inch OD plastic tubing

Product Number

Table 1.

Description

Product Number

Pneumatic Low Temperature Detection Thermostat 134-1700

Pneumatic High Temperature Detection Thermostat 134-1710

Accessories

Remote Bulb Holder Kit for 134-1710 only

808-517

Summary of content (6 pages)

PAGE 1
Technical Instructions Document No. 155-063P25 TH 134-1 April 1, 2005 PowersTM Controls TH 134 Pneumatic High And Low Temperature Detection Thermostats Description The TH 134 Pneumatic High and Low Temperature Detection Thermostats have an internal pneumatic switch that exhausts air from the line to a controlled device when the temperature reaches the set point. They require manual reset to close the switch.
PAGE 2
Technical Instructions Document Number 155-063P25 April 1, 2005 TH 134 Pneumatic High and Low Temperature Detection Thermostats Warning/Caution Notations Application WARNING: Personal injury/loss of life may occur if a procedure is not performed as specified. CAUTION: Equipment damage, or loss of data may occur if the user does not follow procedure as specified. The pneumatic high and low temperature detection thermostats are used on pneumatic heating, cooling and air conditioning systems.
PAGE 3
TH 134 Pneumatic High and Low Temperature Detection Thermostats Specifications (Also See Table 2) Technical Instructions Document Number 155-063P25 April 1, 2005 Material Case Cover Pneumatic Switch 0.062-inch (1.6 mm) cold rolled steel 0.028-inch (0.7 mm) cold rolled steel Normally closed, 0.022-inch (0.6 mm) dia. bleed restrictor Ambient temperature range 134-1700 134-1710 Restrictor Shipping Weight Dimensions Greater than set point to 140°F (60°C) -40° to 140°F (-40° to 60°C) 40 scim (11 ml/sec) 2.
PAGE 4
Technical Instructions Document Number 155-063P25 April 1, 2005 Mounting and Installation Low Temperature Detection General Guidelines Large Walk-in Ducts (Figure 6) TH 134 Pneumatic High and Low Temperature Detection Thermostats • Locate the sensing element in the downstream side of the coil. • Install as much of the bulb as possible in a horizontal plane. If too much of the bulb is vertical, it will not operate properly.
PAGE 5
TH 134 Pneumatic High and Low Temperature Detection Thermostats Mounting and Installation, continued Technical Instructions Document Number 155-063P25 April 1, 2005 1. Attach the mounting bracket to the thermostat with the two round head screws provided. Limited Access Ducts (Figure 7) 2. Attach a mounting flange (part number 808-412) on the opposite side of the duct (near the bottom) from where the thermostat will be mounted. 3. Mount a second flange on an 8-inch by 4-inch sheet metal plate. 4.
PAGE 6
Technical Instructions Document Number 155-063P25 April 1, 2005 Mounting and Installation, continued Instructions TH 134 Pneumatic High and Low Temperature Detection Thermostats 1. Attach the mounting bracket to the thermostat with the two round head screws provided. 2. Cut a 1-inch diameter hole in the duct. Use the flange to determine the screw hole positions and drill three holes. See the mounting flange inset in Figure 7. 3. Place the gasket against the duct.