Siemens Free Energy Band TH 193 HC Owner's manual

Powers®Controls
Technical Instructions
Document No. 155-068P25
TH 193-4
October 26, 2010
Free Energy Band®TH 193 HC
Heating/Cooling Room Thermostat
80
60
70
TH0356R1
POWERS
6050 70 80
Description The TH 193 HC thermostats are proportional dual output, dual setpoint, two-pipe (dual
one-pipe, low air capacity) or three-pipe (dual two-pipe, high air capacity) sensor
controllers. Each thermostat includes a wall mounting plate for installation in a variety of
rough-in terminal boxes. Sensitive bimetals respond to temperature changes to
modulate control air through a flapper nozzle. As the heating load decreases due to
internal heat gains, a dead band of control minimizes energy consumption while the
setpoint changes from 72°F (22°C) heating mode to 78°F (26°C) cooling mode. Two
setpoint dials allow adjustment of the dead band 4°F (2°C) minimum. Air connections
are made with 5/32-inch (4 mm) O.D. plastic tubing, directly to the thermostat chassis
for retrofit applications or with plug-in adapters (provided with the TH 192 rough-in
terminal box or optional accessories), which slide into the wall mounting plate.
Features •Direct and reverse acting for heating and cooling modes.
•Two separate adjustable temperature setpoint indicating dials.
•Two highly sensitive bimetal thermostatic elements.
•Fahrenheit or Celsius models.
•Individual field adjustable sensitivity with graduated scale.
•Integral field adjustable limit stops.
•Control pressure test port accessible without removing cover.
•Easily replaceable thermometer, setpoint dials, filters and restrictor plate.
•Covers available for concealed or exposed thermometers, and for concealed
adjustment and setpoint indication.
•Standard plastic thermostat covers provide Desert Beige or white finish.
Siemens Industry, Inc.

Technical Instructions Free Energy Band TH 193 HC Heating/Cooling Room Thermostat
Document Number 155-068P25
October 26, 2010
Page 2 Siemens Industry, Inc.
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•
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Optional Design
Features Fixed temperature limit stops meet government specifications.
Metal covers available in standard configurations with Desert Beige or white
finish.
Competitor adapter mounting kits available
Application TH 193 HC thermostats control space temperature and take advantage of the dead
band to "float" room temperature between heating and cooling modes while maintaining
energy management (maximum economy) and occupancy comfort. TH 193 HC
thermostats control valve and damper actuators in building applications that require
early morning heat and afternoon cooling.
Use TH 193 HC two-pipe (dual one-pipe) thermostats with external restrictors (20 scim,
5.4 ml/sec) where a limited air capacity operates a single valve and/or actuator. Use
TH 193 HC three-pipe (dual two-pipe) thermostats where multiple valves and actuators,
used with or without high/low limiting controls, require higher air capacities. The
thermostats are available with covers that conceal or expose the setpoint adjustment
dials.
Figure 1. Typical TH 193 HC Thermostat Application.
Piping
Figure 2. TH 193 HC Thermostat
Dual One-Pipe Connections.
Figure 3. TH 193 HC Thermostat
Dual Two-Pipe Connections.

Free Energy Band TH 193 HC Heating/Cooling Room Thermostat Technical Instructions
Document Number 155-068P25
October 26, 2010
Siemens Industry, Inc. Page 3
See Table 1 for product number and ordering information on TH 193 HC thermostat
chassis.
1. Does application require one-pipe or two-pipe connection?
a. One-pipe thermostats are low air capacity devices and have only one port
connection (R1). This application requires an external restrictor.
b. Two-pipe thermostats are high air capacity devices for controlling two or more
terminal devices such as damper actuators or valves. This application requires
two port connections: supply (S) and return (R1).
Product Numbers
and Ordering
Information
Chassis
2. Is a Fahrenheit or Celsius scale required?
3. Is the heating control direct or reverse acting?
4. Is the cooling control direct or reverse acting?
Table 1. TH 193 HC Thermostat Chassis Part Numbers.
Chassis with Wall Plate
Fahrenheit CelsiusConnection
Type Setpoint Adjustment Heating DA Heating RA Heating DA Heating RA
Cooling DA
193-211 Cooling DA 193-213 Cooling DA 193-231 Cooling DA 193-233
One-Pipe
Relay Cooling RA
193-212 Cooling RA 193-214 Cooling RA 193-232 Cooling RA 193-234
Cooling DA
193-215 Cooling DA 193-217 Cooling DA 193-235 Cooling DA 193-237
Two-Pipe
Relay
Exposed
at bottom
of cover
Cooling RA
193-216 Cooling RA 193-218 Cooling RA 193-236 Cooling RA 193-238

Technical Instructions Free Energy Band TH 193 HC Heating/Cooling Room Thermostat
Document Number 155-068P25
October 26, 2010
Page 4 Siemens Industry, Inc.
Covers See Table 2 for product number and ordering information on TH 193 HC thermostat
covers.
1. Is the setpoint adjustment exposed for customer adjustment or concealed to
prevent alteration of setting?
2. Is the thermometer exposed or concealed?
3. Is the setpoint indication exposed or concealed behind cover?
4. Is a plastic or zinc cast metal cover required?
a. Plastic covers order 192-2XX.
b. Metal covers order 192-3XX.
5. Is finish of cover standard or optional? The standard finish color for plastic and
metal covers is Desert Beige.
2. For white plastic cover option, add “W” suffix code to cover part number
(for example: 192-256W). See Table 2.
3. For white metal cover option, add "H" suffix code to cover part
(for example: 192-356H). See Table 2.
Table 2. TH 193 HC Thermostat Cover Part Numbers.
Cover Configuration Cover Part Number 2
Setpoint
Adjustment
Thermometer Setpoint Indicator Standard Plastic Cover
Desert Beige
Optional
Metal Cover
Desert Beige
Concealed 192-256 192-356Concealed Exposed Concealed 192-254 192-354
Concealed 192-267 192-367
Key1
Exposed 192-268 192-368
Concealed 192-258 192-358Exposed
Exposed
Exposed
192-260 192-360
1. Key setpoint adjustment cover is required for all thermostat chassis with
optional 1/2-inch setpoint adjustment knobs (for replacement only).
2. To order a plastic cover with white finish, add the "W" suffix code. To order
a metal cover with a white finish, add the "H" suffix code.

Free Energy Band TH 193 HC Heating/Cooling Room Thermostat Technical Instructions
Document Number 155-068P25
October 26, 2010
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).