Johnson Controls T-4752 Catalog Page
T-4752
T-4752 Heating-Cooling Thermostat
Heating-Cooling Thermostat
Code No. LIT-1921685
Issued January 15, 2008
Description
The T-4752 Thermostat is a high volume
output, heating-cooling thermostat. Provides
Features
• includes Fahrenheit dial
• available in vertical or horizontal model
automatic changeover between Direct Acting
(DIR) and Reverse Acting (REV) 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.
Repair Information
If the T-4752 Heating-Cooling Thermostat
fails to operate within its specifications,
replace the unit. For a replacement
thermostat, contact the nearest
Johnson Controls® representative.
Selection Charts
T-4752 Heating-Cooling Thermostat
Code Number Description
T-4752-201 15 psig DIR, 20 psig REV, Horizontal Mounting
T-4752-202 15 psig DIR, 20 psig REV, Vertical Mounting
T-4752-205 15 psig REV, 20 psig DIR, Horizontal Mounting
T-4752-206 15 psig REV, 20 psig DIR, Vert ical Mounting
1. Order cover and mounting bracket separately.
Commonly Used Accessories for T-4752 (Part 1 of 2)
Code
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
1
Description
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
(must be ordered in multiplies of ten)
for surface mounted thermostats with
exposed tubing
(must be ordered in multiplies of ten)
restricts adjustment of set point dial
external setpoint adjustment
Commonly Used Accessories for T-4752 (Part 2 of 2)
Code
Description
Number
T-4000-2140 Beige Plastic Cover, Horizontal,
T-4000-3140 White Plastic Cover, Horizontal,
T-4000-2141 Beige Plastic Cover, Horizontal,
T-4000-3141 White Plastic Cover, Horizontal,
T-4000-2142 Beige Plastic Cover, Horizontal,
T-4000-3142 White Plastic Cover, Horizontal,
T-4000-2144 Beige Plastic Cover, Vertical
T-4000-3144 White Plastic Cover, Vertical
T-4000-2145 Beige Plastic Cover, Vertical,
T-4000-3145 White Plastic Cover, Vertical,
T-4000-2146 Beige Plastic Cover, Vertical,
thermometer (no set point windows)
thermometer (no set point windows)
1 set point window (no thermometer)
1 set point window (no thermometer)
1 set point window with thermometer
1 set point window with thermometer
(no thermometer, no set point windows)
(no thermometer, no set point windows)
1 set point window (no thermometer)
1 set point window (no thermometer)
1 set point window with thermometer
T-4002-5017 External set point dial, Horizontal °F
T-4002-5018 External set point dial, Vertical °F
T-4000-2138 Beige Plastic Cover,
T-4000-2139 Beige Plastic Cover, Horizo ntal
T-4000-3139 White Plastic Cover, Horizontal
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.
Horizontal or Vertical
(no thermometer, no se t point windows)
(no thermometer, no se t point windows)
(no thermometer, no se t point windows)
Note: For additional accessories, refer to T-4000 Series Accessories.
Technical Specifications
T-4752 Heating-Cooling 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 Features Single dial adjusts both set points
Factory set at approximately 2.5 psig/°F (32 kPa/°C)
Nominal Day 15 psig (105 kPa),
Nominal Night 20 psig (140 kPa),
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