Siemens Free Energy Band TH 193 HC, Powers Controls Free Energy Band TH 193 HC Technical Instructions

Powers® Controls

Free Energy Band® TH 193 HC
Heating/Cooling Room Thermostat

Technical Instructions

Document No. 155-068P25

TH 193-4

October 26, 2010

6050 70 80

70

60

TH0356R1

POWERS

80

Description

Features

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 decrea ses 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 mod e. 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.

• 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

•

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 an d 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.

Piping

Figure 2. TH 193 HC Thermostat

Dual One-Pipe Connections.

Page 2 Siemens Industry, Inc.

Figure 1. Typical TH 193 HC Thermostat Application.

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

Product Numbers
and Ordering
Information

Chassis

See Table 1 for product number and ordering information on TH 193 HC thermo stat
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 req uires
two port connections: supply (S) and return (R1).

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 Celsius Connection

Type

Setpoint

Adjustment

Heating DA Heating RA Heating DA Heating RA

One-Pipe

Relay

Two-Pipe

Relay

Exposed

at bottom

of cover

Cooling DA

193-211

Cooling RA

193-212

Cooling DA

193-215

Cooling RA

193-216

Cooling DA

193-213

Cooling RA

193-214

Cooling DA

193-217

Cooling RA

193-218

Cooling DA

193-231

Cooling RA

193-232

Cooling DA

193-235

Cooling RA

193-236

Cooling DA

193-233

Cooling RA

193-234

Cooling DA

193-237

Cooling RA

193-238

Siemens Industry, Inc. Page 3

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

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.

Setpoint

Adjustment

1

Key

Cover Configuration

Thermometer

Concealed 192-256 192-356 Concealed

Setpoint

Indicator

Concealed

Exposed

Concealed 192-267 192-367

Exposed

Cover Part Number

Standard

Plastic Cover

Desert Beige

Metal Cover

Desert Beige

192-254 192-354

Exposed 192-268 192-368

Concealed 192-258 192-358 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.

2

Optional

Page 4 Siemens Industry, Inc.