User Guide

Printed in U.S.A. 10-06 © Copyright 2006 TAC All Rights Reserved. F-23919-2
TAC
1354 Clifford Avenue
P. O. Box 2940
Loves Park, IL 61132-2940
www.tac.com
APPLICATION
The T18/TR18 & T19/TR19 Series Pneumatic Room
Thermostats are designed for proportional control of
pneumatic devices and actuators in environmental control
systems. These two pipe thermostats incorporate a highly
sensitive bimetal element and a pilot operated relay with
pneumatic feedback for accuracy and stability over the entire
operating range.
Thermostat covers are available in various styles to meet
particular requirements. Cover options include models with
setpoint scale and thermometer, setpoint scale only,
thermometer only, or blank. An external setpoint adjustment
cover is available with all models and can be field installed on
covers where required.
SPECIFICATIONS
Action: Proportional.
Setpoint Range: 55 to 85 °F.
Throttling Range: 2 to 12 °F/12 psi adjustable, factory set
3 °F.
Construction:
Components, Die cast aluminum, stainless steel and
nylon.
Diaphragms, Fabric-reinforced neoprene.
Air Filter, Internal.
Supply Air Pressure: Clean, dry, oil free air required (ref.
EN-123).
Minimum, 8psig.
Nominal, 20psig.
Maximum, 30psig.
Connections: Fittings for spring-reinforced 3/16" plastic
tubing (order separately)
Air Consumption: 0.009 scfm.
Calibration Point: 9 psig branch line pressure when
ambient temperature equals setpoint.
Setpoint Adjustment: Serrated thumbwheel, external or
concealed.
Mounting: Upright position on wall.
Dimensions: See Figure-1.
*These models have factory installed dial stops.
ACCESSORIES
6-371 Mounting ring (use with mounting heads)\
10-07 Mounting head, 2 tube, copper
10-15 Aspirating box, 2 pipe
10-53 Metal thermostat guard
10-57 Mortar joint fitting, 2 tube copper
10-58 Mounting ring (use with N5-52)
10-59 Internal stop kit
10-62 Clear plastic cover thermostat guard
10-63 Insulating backplate, for plastic guards
10-64 Tubing assembly with eyelets and fittings
10-66 Mortar joint fittings, 2 "FR" tubes
10-67 Mounting ring, vinyl adhesive
10-72 Concealed adjustment cover, for metal covers
10-73 Drywall mounting fitting (snap-in)
10-76 Opaque plastic guard
10-77 Adaptor plate
10-78 Insulating backplate
10-81 Concealed adjustment cover, for plastic cover
MCS-GA Gauge tap adaptor
N2-4 Calibration tool
N5-49 Adaptor (for use with N5-53)
N5-52 Bracket, drywall mount
N5-53 Bracket, stud mount rough-in
N5-95 Wall thermostat, conversion kit
Table-1 Specifications.
Model
Number
Action Comments
T18-301 Direct
T19-301 Reverse
T18-3011* Direct
T19-3011* Reverse
TR18-3011* Direct See Table 2
TR19-3011* Reverse See Table 2
TR18-3091* Direct See Table 3
TR19-3091* Reverse See Table 3
T18/TR18 & T19/TR19 Series
Two-Pipe Pneumatic Room Thermostats
General Instructions