Johnson Controls T-4756 Catalog Page
T-4756
T-4756 Heating-Cooling
High Volume Output Thermostat
Heating-Cooling High Volume Output Thermostats
Description
The T-4756 Thermostat is a high volume
output, dual-temperature, dual-dial, heatingcooling thermostat. The T-4756 provides
automatic changeover between direct and
reverse actions when supply pressure
changes from 15 to 20 psig (105 to 40 kPa).
Refer to T-4000 Series Pneumatic Room
Thermostat Product Bulletin (LIT-7171060P)
for important product information.
Features
• includes Fahrenheit dial
• available in vertical or horizontal model
Repair Information
If the T-4756 Heating-Cooling High Volume
Output Thermostat fails to operate within its
specifications, replace the unit. For a
replacement thermostat, contact the nearest
Johnson Controls® representative.
Code No. LIT-1921690
Issued January 15, 2008
Selection Charts
T-4756 Heating-Cooling High Volume Output Thermostat
Code Number Description
T-4756-201 15 psig DIR, 20 psig REV, Horizontal Mounting
T-4756-202 15 psig DIR, 20 psig REV, Vertical Mounting
T-4756-205 15 psig REV, 20 DIR, Horizontal Mounting
T-4756-206 15 psig REV, 20 psig DIR, Vertical Mounting
1. Order cover and mounting bracket separately.
Commonly Used Accessories for T-4756 (Part 1 of 2)
Code
Description
Number
T-4002-124 Room instrument mounting bracket for
T-4002-122 Terminal Connector, with two straight
T-4002-123 Terminal Connector, with angle fittings
T-4002-5003 Restricted adjustment pin (100/kit)
T-4002-5012 Adjusting knob kit provides a means of
T-4000-2138 Beige Plastic Cover,
T-4000-2139 Beige Plastic Cover, Horizontal
T-4000-3139 White Plastic Cover, Horizontal
T-4000-2140 Beige Plastic Cover, Horizontal,
T-4000-3140 White Plastic Cover, Horizontal,
surface-mounting thermostats and
covers; includes drywall clips, spacers,
and mounting templates
fittings for plug-in connection to
5/32 in. O.D. polyethylene tubing
for surface mounted thermostats with
exposed tubing
restricts adjustment of set point dial
external setpoint adjustment
Horizontal or Vertical
(no thermometer, no set point windows)
(no thermometer, no set point windows)
(no thermometer, no set point windows)
thermometer (no set point windows)
thermometer (no set point windows)
1
Commonly Used Accessories for T-4756 (Part 2 of 2)
Code
Description
Number
T-4756-2141 Beige Plastic Cover, Horizontal,
T-4756-1738 Beige Plastic Cover, Horizontal,
T-4000-2144 Beige Plastic Cover, Vertical
T-4000-3144 White Plastic Cover, Vertical
T-4756-2145 Beige Plastic Cover, Vertical,
T-4756-1739 Beige Plastic Cover, Vertical,
2 set point windows (no thermometer)
2 set point windows with thermometer
(no thermometer, no set point windows)
(no thermometer, no set point windows)
2 set point windows (no thermometer)
2 set point window with thermometer
Note: For additional accessories, refer to T-4000 Series Accessories
Catalog Page (LIT-1921710) on Page 94.
Technical Specifications
T-4756 Heating-Cooling High Volume Output Thermostat
Sensitivity Adjustable from .75 to 4.0 psig/°F (9 to 50 kPa/°C)
Flow Capacity 400 SCIM (107 mL/s)
Air Consumption 20 SCIM (5 mL/s)
Supply Pressure 13 to 25 psig (91 to 175 kPa)
Dial Range 55 to 85°F (Two Dials)
Air Connections Two (Supply and Output)
Special Feature Dual Dials, separate set point adjustments
Factory set at approximately 2.5 psig/°F (32 kPa/°C)
15 psig (105 kPa)
20 psig (140 kPa)
The performance specifications are nomina l and conf orm to accep table industr y standar ds. For ap plications a t condition s beyond th ese specification s, consult the local Johnson Controls o ffice.
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2011 Johnson Controls, Inc.
www.johnsoncontrols.com
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