T28 Series Fan Coil Thermostat

This thermostat controls light duty line voltage fan coil or baseboard valves on heating, cooling, and heating-cooling systems. The thermostat can control one or two valves directly. These thermostats are rated for 120, 208, or 240 VAC at 50 to 60 Hz.

Applications

Use for line voltage control of heating and cooling equipment.

Features

precision, snap-acting contacts
heating and cooling anticipation
cooling and heating-cooling models have an interlocked fan "off" position

Technical Specifications

The T28 mounts on a standard, double outlet box.

Nominal operating differential at 0.6°F (0.3°C) heating, 1°F (0.6°C) cooling on standard 120 VAC fan coil valves. Sequenced models have 6°F (3.3°C) differential from heat on to cool on.

Electrical Ratings

VAC	Thermostat				Fan Switch
	Cooling		Heating		FL	LR
	Normal	Inrush	Normal	Inrush	FL	LR
120	0.32	1.0	0.12	0.36	5.8	34.8
208	0.18	0.57	0.07	0.21	3.3	19.8
240	0.16	0.50	0.06	0.18	2.9	17.4

Selection Chart

Code Number	Fan Switch	Ship Weight (lb)
Cooling
T28BD-1C	Off-Hi-Med-Lo	1.3
Heating-Cooling (Remote changeover, Single valve for heating and cooling)a
T28CD-1C	Off-Hi-Med-Lo	1.3
Heating-Cooling, Sequenced (Automatic changeover, separate valves for heating and cooling)b
T28DA-1C	None	1.0
T28DB-1Ca	Off-On	1.3
T28DD-1Ca	Off-Hi-Med-Lo	1.3
T28DG-1Ca	Off-Hi-Med-Lo	1.3

a. "Off" position of fan switch interlocks to turn off cooling.

b. For automatic changeover where one valve functions for heating or cooling, use A19CAC-2 strap-on changeover control.

c. "Off" position of fan switch interlocks to turn off both heating and cooling.

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Send mail to amberb@telcoenvirotrols.com with questions or comments about this web site.
Last modified: 05/07/08

Return to Homepage Contact Us

Send mail to amberb@telcoenvirotrols.com with questions or comments about this web site. Last modified: 05/07/08

Send mail to amberb@telcoenvirotrols.com with questions or comments about this web site.
Last modified: 05/07/08