The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office.Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2011 Johnson Controls, Inc.www.johnsoncontrols.com1 of 1T-4756Heating-Cooling High Volume Output ThermostatsDescriptionThe T-4756 Thermostat is a high volume output, dual-temperature, dual-dial, heating-cooling 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.Selection Charts T-4756 Heating-Cooling High Volume Output Thermostat11.Order cover and mounting bracket separately.Code NumberDescriptionT-4756-20115 psig DIR, 20 psig REV, Horizontal MountingT-4756-20215 psig DIR, 20 psig REV, Vertical MountingT-4756-20515 psig REV, 20 DIR, Horizontal MountingT-4756-20615 psig REV, 20 psig DIR, Vertical MountingCommonly Used Accessories for T-4756 (Part1of2)Code NumberDescriptionT-4002-124Room instrument mounting bracket for surface-mounting thermostats and covers; includes drywall clips, spacers, and mounting templatesT-4002-122Terminal Connector, with two straight fittings for plug-in connection to 5/32 in. O.D. polyethylene tubingT-4002-123Terminal Connector, with angle fittings for surface mounted thermostats with exposed tubingT-4002-5003Restricted adjustment pin (100/kit) restricts adjustment of set point dialT-4002-5012Adjusting knob kit provides a means of external setpoint adjustmentT-4000-2138Beige Plastic Cover, Horizontal or Vertical(no thermometer, no set point windows)T-4000-2139Beige Plastic Cover, Horizontal(no thermometer, no set point windows)T-4000-3139White Plastic Cover, Horizontal(no thermometer, no set point windows)T-4000-2140Beige Plastic Cover, Horizontal, thermometer (no set point windows)T-4000-3140White Plastic Cover, Horizontal, thermometer (no set point windows)Note:For additional accessories, refer to T-4000 Series Accessories Catalog Page (LIT-1921710) on Page94.Technical SpecificationsT-4756-2141Beige Plastic Cover, Horizontal, 2 set point windows (no thermometer)T-4756-1738Beige Plastic Cover, Horizontal, 2 set point windows with thermometerT-4000-2144Beige Plastic Cover, Vertical(no thermometer, no set point windows)T-4000-3144White Plastic Cover, Vertical(no thermometer, no set point windows)T-4756-2145Beige Plastic Cover, Vertical, 2 set point windows (no thermometer)T-4756-1739Beige Plastic Cover, Vertical, 2 set point window with thermometerT-4756 Heating-Cooling High Volume Output ThermostatSensitivityAdjustable from .75 to 4.0 psig/°F (9 to 50 kPa/°C)Factory set at approximately 2.5 psig/°F (32 kPa/°C)Flow Capacity400 SCIM (107 mL/s)Air Consumption20 SCIM (5 mL/s)Supply Pressure13 to 25 psig (91 to 175 kPa)15 psig (105 kPa)20 psig (140 kPa)Dial Range55 to 85°F (Two Dials)Air ConnectionsTwo (Supply and Output)Special FeatureDual Dials, separate set point adjustmentsCommonly Used Accessories for T-4756 (Part2of2)Code NumberDescriptionCode No. LIT-1921690Issued January 15, 2008 T-4756 Heating-Cooling High Volume Output ThermostatFeatures•includes Fahrenheit dial•available in vertical or horizontal modelRepair InformationIf 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 JohnsonControls® representative.Next >