TAC Pneumatic Products Catalog

Dual Setpoint/Deadband Room Thermostat
The dual setpoint/deadband pneumatic room
thermostats are designed for the proportional
control of pneumatic valves, damper actuators, and
other final control devices in environmental control
systems. These devices are for use when it is
desirable to set up a temperature span within
which the HVAC system uses no energy for heating
or cooling between selected heating and cooling
setpoints. The high capacity, two pipe,
pilot-operated relay type design provides
pneumatic feedback for accuracy and stability over
the entire operating range.
Features:
• Attractive appearance (various metal or ABS plastic covers
available).
• Factory calibrated. S.S. ball-in-seat provides pneumatic
feedback for linear, stable operation.
• Deadband is set merely by setting desired heating and
cooling setpoints.
• Deadband output pressure factory set at 8 psig; field
adjustable.
• Leakproof, O-Ring-sealed, spring-loaded self-closing
branch gauge tap.
Model Chart
Model No. a
Wholesale Model
No. b
T35-301 2212-318
T36-301 2212-319
�� 2212-538 c
�� 2212-539 c
Specifications
Action Proportional, with deadband.
T35-301 Direct.
T36-301
Setpoint range
Reverse.
Heating 57 to 75�F (14 to 24�C).
Cooling 65 to 83�F (18 to 28�C).
Throttling range 1.5�/5 psi non-adjustable for each setpoint (approximately).
T35-301, T36-301 (2212-318, 2212-319)
Parts Description
� Refer to Specifications.
2212-318 Thermostat
21-928 Blank cover
22-022 Conversion kit
2212-319 Thermostat
21-928 Blank cover
22-022 Conversion kit
a
All thermostats include: Two mounting screws.
b All wholesale thermostats include: One or two 1/4 x 3/16 in. tubing reducer(s), 20-693 tubing, 20-714 wall-plate, 20-711 mounting plate, and two mounting
screws.
c This is a Thermostat Kit; refer to Table , “T-Series Thermostat Kits,” on page 122.
F-27383-1 © Copyright 2006 TAC. All Rights Reserved. 127
T35-30
T36-30
(2212-
8,
2212-3
)