Schneider Electric TK-17xx Series Catalog Page

TK-17xx Series

Dual Setpoint, Single Output Room Thermostats

For proportional control of pneumatic-actuated valves and damper actuators to maintain room air temperatures in heating, ventilating, and air conditioning systems.

Features:

• Branch-line to sensing-element pneumatic feedback for linear, stable operation.

• Plastic cover supplied with exposed setpoint and thermometer.

• Cover insert included with a blank face plate with logo.

Model Chart

Model No.

Dial Range

TK-1717

TK-1727 Reverse Reverse

TK-1731 Reverse Direct

TK-1741 Direct Reverse

TK-1711 TK-1751

55 to 85°F

TK-1721 TK-1761

22 psi required if setpoints are more than 20°F apart.

Control dial is marked in °F on one side a nd °C on the other side. Units have built-in stops that can limit high and/or low setting of each dial.

Direct Acting (D.A.) ⎯ Increase output pressure on temperature rise. Reverse Acting (R.A.) ⎯ Decrease output pressure on temperature rise.

For additional options or to reverse heat/cool legend, order cover replacement kit AT-46-500 Heat/Cool, Cool/Heat or Day/Night.

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).

15 psig Supply Pressure

Control Action

Direct

Reverse Reverse

Cover Legend

Heat

Day

Dial Range

55 to 85°F

Day

Ngh

TK-17xx

20 psig Supply Pressure

Control Action

Direct

Cover Legend

Cool

Night

with

Insert

Figure 1 Covers.