TSSHC-2H Thermostat

TSSHC-2H RADIANT HEAT THERMOSTAT

The SSHC Radiant Heat Thermostat is sold as an accessory for SSHC's Enerjoy ceiling radiant heating panels. But this simple control device, which operates differently than ordinary thermostats, would actually work well with any type of line-voltage electric heating system. The SSHC Radiant Heat Thermostat is sold as an accessory for SSHC's Enerjoy ceiling radiant heating panels. But this simple control device, which operates differently than ordinary thermostats, would actually work well with any type of line-voltage electric heating system. The difference between this and conventional thermostats is that the SSHC device senses "operative temperature" —a special measurement that takes into account radiant heat exchange as well as conductive heat exchange— rather than just air temperature. The advantage is that in a room with very warm or cold surfaces, such as radiant heating panels or large windows, the operative temperature indicates occupant thermal comfort better than air temperature. The Radiant Heat Thermostat, which is manufactured for SSHC by Solid State Heating has a gray fluid-filled control knob that is exposed to the room environment (see Figure 1). The knob exchanges radiant heat with the room environment and also reacts to room air temperature. As the knob changes temperature, the internal fluid changes volume and activates a control switch.
	Figure 1 - The sensor in this radiant thermostat senses warm or cool surfaces in the room as well as air temperature.
Cold-window sensor A room with 70°F air temperature may feel cool during winter if one wall has a very large picture window. The coolness sensation is caused by radiant heat loss from occupants" bodies to the cool glass surface. A conventional thermostat, which senses only air temperature, would not respond to the radiant heat loss. The SSHC Radiant Heat Thermostat does. Larry Berglund is a research scientist at the John B. Pierce Foundation in New Haven Connecticut. Berglund tested the SSHC thermostat in an environmental chamber with a simulated cold window surface. He used the radiant heat thermostat to control Enerjoy panels on the ceiling while the temperature of the simulated window was decreased from 70°F to 45°F. The results showed that the SSHC thermostat worked well and maintained the operative temperature at about 73°F. Without the radiant heat panels, the operative temperature dropped to 65°F (see Figure 2). Berglund told EDU that although there are more elaborate radiant thermostats that might work even better, the SSHC radiant thermostat is considerably better than conventional thermostats for controlling radiant heating systems. Availability - The SSHC model TSSHC-2H radiant heat thermostat is available directly from SSHC, Inc., 4 Custom Drive, PO Box 769, Old Saybrook, CT 06475; (800) 544-5182.
	Figure 2 - In a test room with a simulated cold picture window, the “operative temperature” was an uncomfortable 65°F without radiant heat, but was maintained at 73°F with radiant ceiling panels controlled by the SSHC,Inc. radiant thermostat
The TSSHC-2H Electric Heat Thermostat is designed for use on radiant electric heating installations. The narrow operating differential and the ability of a fully exposed knob to sense both radiant heat and room air temperature make this control ideal for use on such installations The TSSHC-2H is intended for use on 120, 240 or 277 volts where local codes require that a double line disconnect thermostat be used. Dial Setting: Knob may be set anywhere between 40° and 85°F by simply turning knob so that indicator on the knob points to the desired setting. Normal radiant comfort setting is 65°F with set back to 62°F. The knob may be turned past 40° to the "OFF" position to obtain temporary shutdown of the heating equipment for short periods of time such as on weekends, vacations, etc. Turning knob to 'OFF position will break both sides of line. NOTE: Only one side of line is broken during normal cycling this thermostat. INSTALLATION Quick response Solid State radiant heat modules allow users to Treat Their Heat Like Their Lights. ™ To make this easy for users, Thermostats are normally placed next to and in line with the light switch, observing the following guidelines: The control should be mounted next to the light switch or in the wall, approximately 4 feet from the floor, as near as possible to the center of the controlled area. It should be mounted on a partitioning wall, not on an outside wall. It should be mounted as far as possible from undesirable sources of heat and cold such as: Windows and doors Direct rays from sun Hot or cold water pipes Adjoining outside walls SPECIFICATIONS
Electrical Rating: Non-inductive 22 A. (2500W.) 120 V. A.C. 22 A. (5000W.) 240 V. A.C. 18 A. (5000W.) 277 V. A.C. Switch Action: Open on rise Range: 40° to 85°F.	Differential: 1°F. Cycle Occurrence: Frequent Noise: None-quiet Line Droop: Less than 1°F at 5 AMPS, 10,15. Contact Structure: Double line disconnect
WIRING All wiring should be done according to local and national electrical codes and ordinances. The thermostat may be mounted in any standard 4" x 2" or 3" x 2" electrical outlet box. For ease of installation use a deep type box. CAUTION: Disconnect power supply. USE WITH COPPER CONDUCTORS ONLY. Use wire nuts or other local code approved devices to connect line and load wires to appropriate color-coded thermostat leads (see wiring diagram). All connections must be tight. Push the lead wires into the outlet box and mount the thermostat to the outlet box with screws provided. Take care not to push or damage the knob sensing element during installation. Snap on the thermostat cover and turn knob to desired setting.