Brochure
TK-17xx Series
142
© Copyright 2006 TAC. All Rights Reserved. F-27383-1
Dual Setpoint, Single Output Room Thermostats
Model Chart
Figure 1 Standard Covers.
For proportional control of pneumatic-actuated
valves and damper actuators to maintain room air
temperatures in heating, ventilating, and air
conditioning systems.
Features:
• Attractive appearance.
• Branch-line to sensing-element pneumatic feedback for
linear, stable operation.
• Available with qF or qC setpoint scales and thermometers.
• Covers supplied with exposed setpoint and thermometer.
• Cover inserts included for:
- Exposed setpoint only.
- Blank cover.
• Aspirated versions of certain models available.
Model No. 15 psig Supply Pressure
20 psig Supply Pressure
a
a
22 psi required if setpoints are more than 20qF apart.
qF
qC
b
b
Celsius models not available for wholesale.
Dial Range
c
c
Control dial is marked in qF on one side and qC on the other side. Units have built-in stops that can limit high and/or low setting of each dial.
Control
Action
d
d
Direct Acting (D.A.) Increase output pressure on temperature rise.
Reverse Acting (R.A.) Decrease output pressure on temperature rise.
Cover
Legend
Dial
Range
c
Control
Action
d
Cover
Legend
TK-1717
e
e
These models available in aspirated versions, add -600 to model number.
TK-1717-116
55 to 85qF
(13 to 29qC)
Direct
Heat
f
f
Use AT-67 series cover plate to reverse heat/cool legends.
55 to 85qF
(13 to 29qC)
Direct
Cool
TK-1727
e
TK-1727-116 Reverse Reverse
TK-1731
e
TK-1731-116 Reverse Direct
TK-1741
e
TK-1741-116 Direct Reverse
TK-1711
e
TK-1751
g
g
Units include a manual override lever for overriding 22 psig (152 kPa) operation and placing control into 15 psig (103 kPa) control mode when unit is
supplied with 22 psig (152 kPa). Lever automatically resets when supply pressure is reduced to 15 psig (103 kPa).
TK-1711-116
TK-1751-116
g
Direct
Day
Direct
Night
TK-1721
e
TK-1761
g
TK-1721-116
Reverse Reverse
TK
-
17
xx
Series
9
0
80
70
60
50
D
a
y
N
ig
h
t
TK-17xx-600
Aspirated Thermostat
TK-17xx
Insert
with
F
C -116
Insert