Product Overview
Table Of Contents
- Features and Benefits
- Introduction
- Operating Differential
- Installation
- Supplies Needed
- Location Considerations
- Dimensions
- Mounting and Wiring
- Table 1: Electrical Ratings
- Adjustments
- Range Stops
- Checkout Procedure
- Dial Lock
- Repairs and Replacement
- Ordering Information
- Table 2: Ordering Information
- Table 3: Faceplate Ordering Information (For T26 Thermostats with Plastic Cover)
- Accessories
- Faceplates Double Control Trim Plates
- Brand Name Faceplates
- Energy Conservation Models
- Concealed Adjustment Faceplates
- Thermostat Guards
- Replacement Parts
- Table 4: Replacement Parts
- Specifications
6 T26 Series Line Voltage Thermostats Product/Technical Bulletin
High Range Stop
1. Set the adjustment knob to the maximum desired
temperature setting.
2. Pull the adjustment knob off the thermostat cover.
3. Loosen the bottom cover screw and remove the
cover.
4. While holding the dial firmly in place, keeping the
setting in line with the reference mark, depress the
tab “A” (see Figure 12) and rotate it clockwise until
it is against the stop pin “C”.
5. Release the tab making sure it fits into the nearest
notch.
6. Replace the thermostat cover, tighten the bottom
cover screw, and replace the adjustment knob.
7. Rotate adjustment knob to desired normal
operating setpoint.
Low Range Stop
1. Set the adjustment knob to the minimum desired
temperature setting.
2. Pull the adjustment knob off the thermostat cover.
3. Loosen the bottom cover screw and remove the
cover.
4. While holding the dial firmly in place, keeping the
setting in line with the reference mark, depress the
tab “B” (see Figure 12) and rotate it
counterclockwise until it is against the stop pin “C.”
5. Release the tab making sure it fits into the nearest
notch.
6. Replace the thermostat cover, tighten the bottom
cover screw, and replace the adjustment knob.
7. Rotate adjustment knob to desired normal
operating setpoint.
Dial Lock
The high range stop and low range stop can be set to
keep the adjustment knob from rotating. To lock the
dial:
1. Set the adjustment knob to the desired
temperature setting.
2. Pull the adjustment knob off the thermostat cover.
3. Loosen the bottom cover screw and remove the
cover.
4. While holding the dial firmly in place, keeping the
setting in line with the reference mark, depress the
tab “A” and rotate it clockwise until it is against the
stop pin “C.” Depress the tab “B” and rotate it
counterclockwise until it is against the stop pin “C.”
See Figure 12.
5. Make sure each tab fits into the notch closest to
the stop.
6. Replace the thermostat cover, tighten the bottom
cover screw, and replace the adjustment knob.
Outside Scale (°F)
Inside Scale (°C)
Low Range
Stop Tab "B"
High Range
Stop Tab "A"
Stop Pin "C"
Sensing Element
Reference Mark
Figure 12: T26 Thermostat Range Tabs
and Stop
C
heckout Procedure
Before applying power, make sure installation and
wiring connections are according to job specifications.
After all necessary adjustments and electrical
connections have been made, put the system into
operation and observe at least three complete
operating cycles before leaving the installation.
R
epairs and Replacement
Field repairs must not be made except for replacement
of the adjustment knob, cover, faceplate, or mounting
plate. Refer to
Table 4: Replacement Parts
for
replacement part ordering information. For a
replacement T26, contact the nearest Johnson
Controls representative.