Data Sheet for Product

Free Energy Band TH 193 HC Heating/Cooling Room Thermostat Technical Instructions
Document Number 155-068P25
February 14, 2022
Siemens Industry, Inc. Page 5
Specifications
Control action See Table 1
Operating ranges 45°F to 85°F (7°C to 30°C)
Supply air pressure, maximum 30 psi (207 kPa)
Normal air supply pressure 18 to 25 psi (124 to 172 kPa)
Sensitivity adjustment 1 to 4 psi/°F (12 to 50 kPa/°C)
Nominal air consumption
One-pipe 25 scim (6.8 ml/sec) per side
Two-pipe 230 scim (63 ml/sec) per side
Temperature response 0.1°F (0.06°C)
Temperature
Storage temperature -10°C to 140°F (-23°C to 60°C)
Ambient operating temperature 40°F to 140°F (4°C to 60°C)
Dial graduations 2°F (1°C)
Factory settings
Calibration @ 72°F (22°C) 7.5 psi (52 kPa)
Sensitivity 2.5 psi/F (31 kPa/C)
Limit stop adjustment 45°F and 85°F (7°C and 30°C)
Standard cover Cycolac, Desert Beige
Shipping weight 0.7 lbs. (0.3 kg)
Dimensions See Figure 10
Accessories
See the following Technical Bulletins for information on accessories:
Technical Bulletin
TB 237 Terminal Kits
TB 214 Adapter Kits
TB 193 Guard Kit
TB 241 Test Head Kit
TB 167 Restrictors
Document Number
155-244P25
155-231P25
155-222P25
155-255P25
155-213
Operation
The TH 193 HC thermostat is a two-temperature thermostat with two separate outputs.
In direct acting control, an increase in temperature increases the control air pressure
and a decrease in temperature decreases the control pressure. In reverse acting
control, an increase in temperature decreases the control air pressure and a decrease
in temperature increases the control pressure.
The TH 193 HC provides two separate bimetal elements; one for heating mode and the
other for cooling mode. The setpoint of the two elements determines the window of the
dead band. A 4F (2C) minimum dead band is standard, where the heating mode
setpoint is 72F (22C) and the cooling mode setpoint is 78F (26C). Figure 4 shows a
typical application with setpoints adjusted for a 6F (4C) dead band.
Figure 5 shows direct acting TH 193 HC output characteristics. As heating increases,
the output pressure increases from 0 to 15 psi (0 to 103 kPa). A field adjustable dead
band occurs. When the dead band elapses, cooling occurs from 0 to 15 psi (0 to
103 kPa).