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Overview

Two-pipe, single temperature, unit mounted, remote bulb pneumatic thermostat used to provide proportional control of pneumatic valves and damper actuators in heating and air conditioning systems.

Features

  • Liquid filled remote bulb.
  • Direct Acting (DA), Reverse Acting (RA) and Heating/Cooling (DA/RA) models are available.

Product Specifications

Airflow Usage
0.011 scfm (5.2 mL/s) with 0.005 in. restriction
Dimensions (in.)
4 3/4 in. high x 3 3/4 in. wide x 3 in. deep
Dimensions (mm)
121 mm high x 95 mm wide x 76 mm deep
Maximum Safe Operating Pressure (psi)
25 psi
Maximum Safe Operating Pressure (kPa)
170 kPa
Temperature Range (F)
135 F maximum
Temperature Range (C)
57 C maximum
Includes
Integral Mounting Bracket, (2) 316297-00021 Bulb Hangers and 304528A Bag Assembly (mounting hardware).
Mounting
In compartment of a unit ventilator
Setpoint Temperature Range (C)
19 C to 30 C
Setpoint Temperature Range (F)
65 F to 85 F
Shipping and Storage Temperature Range (F)
150 F maximum
Shipping and Storage Temperature Range (C)
66 C maximum
Sensor Element
Bulb 3/8 x 9 in., capillary 36 in. (914 mm) long; Remote Bulb
Throttling Range (F)
3.5 F
Throttling Range (C)
2 C
Action
Direct Acting Heating, Reverse Acting Cooling
Air connections
Barb fittings 1/4 in. (6 mm)
Setpoint
Single
Number of Pipes
2
Scale Markings
Warmer / Cooler
Changeover Pressure (psi)
Heat 18 psi, Cool 13 psi
Changeover Pressure (kPa)
Heat 124 kPa, Cool 90 kPa
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