Siemens TH 192 DN, TH 192 DNV, Powers TH 192 DN, Powers TH 192 DNV Technical Instructions

Powers® Controls

TH 192 DN Day-Night and
TH 192 DNV Day-Night-Vent
Room Thermostat

Technical Instructions

Document No. 155-067P25

TH 192-3

October 28, 2010

6050 70 80

Description

Features

70

TH0357R1

The TH 192 DN and DNV thermostats are proportional single output, dual setpoint,
2-pipe or 3-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 change to modulate control air through a flapper nozzle. Two
setpoint dials are provided. When the supply air pressure changes from 18 to 25 psi
(124 to 172 kPa), the thermostat automatically switches from the day to the night
setpoint respectively. Air connections are made with 5/32” (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 day and night modes (DN models).

• Two separate adjustable temperature setpoint indicating dials.

• Two highly sensitive bimetal thermostatic elements.

• Operating mode automatically switches from day to night on change of main air

supply pressure.

• Manual override selector ensures off-hour occupancy comfort.

• Single screw adjustment for changeover switch setpoint.

• Individual field adjustable sensitivity with graduated scale for each mode.

POWERS

DAY

70

80

• Integral field adjustable limit stops.

• Control pressure test port accessible without removing cover.

• Easily replaceable thermometer, setpoint dials, filters, and restrictor plate.

• Fahrenheit or Celsius setpoint dials.

• Covers available for concealed or exposed thermometers and for either concealed,

key, or exposed knob adjustment and setpoint adjustment.

• Standard plastic thermostat covers provide Desert Beige or white finish.

Siemens Industry, Inc.

Technical Instructions
Document Number 155-067P25
October 28, 2010

Optional Design
Features

• Fixed temperature limit stops meet government specifications.

• Metal covers available in Desert Beige or white finish.

• Competitor adapter mounting kits available.

• Some thermostat chassis are available with optional, 1/2-inch, large setpoint

adjustment knobs.

Application

TH 192 DN & DNV thermostats provide day to night (or weekend) temperature setback
to control pneumatic valve and damper actuators in heating and cooling applications
(Figure 1) such as air conditioners, space heaters, unit ventilators, and air volume
controllers.

The day-night thermostat is particularly useful in locations where all rooms in a zone are
not vacated at the same time. Using time clocks on evenings and weekends to reset the
control system to the night mode ensures optimum energy management. When a zone
is operating in maximum economy mode at night, an occupant can reset an individual
space to day temperature by switching a manual override. During night control, the TH
192 DNV provides a separate output signal (full air supply) which allows ventilation to
occur.

TH 192 DN & DNV thermostats maintain maximum economy and occupant comfort
automatically as a day progresses from the day time setpoint (65°F to 68°F, 18°C to
20°C) to the night time setpoint (55°F to 60°F, 13°C to 16°C). The thermostats are
available with covers that conceal or expose the setpoint adjustment dials.

Figure 1. Typical TH 192 DN & DNV Thermostat Applications.

Table 1. Typical TH 192 DNV Thermostat Application.

Chassis Port R2

Pressure

Operation Mode (Air

Supply)

Switching Relay

Connection

0 Psig (0 kPa) Day (S = 18 Psig, 124 kPa) B - D
0 Psig (0 kPa) Night Occupied B - D

Full Air Supply Night (S = 25 Psig, 172 kPa) A - D

Page 2 Siemens Industry, Inc.

TH 192 DN Day-Night and DNV Day-Night-Vent Room Thermostat Technical Instructions
Document Number 155-067P25
October 28, 2010

Piping

Product Numbers
and Ordering
Information

Chassis

Type

Two- or

Three-Pipe

Relay

* This feature requires a key setpoint adjustment cover (or key type cover).

See Table 3.

Figure 2. TH 192 DN

Thermostat Connections.

See Table 2 for product number and ordering information on TH 192 DN & DNV
thermostat chassis.

1. Is a Fahrenheit or Celsius scale required?

2. Is the day and night time control direct or reverse acting?

3. Is a separate, full supply output signal required for ventilation control?

4. Where is setpoint adjustment knob located?
a. Adjustment knob located at bottom of chassis.
b. Adjustment knob on front with 1/2-inch, large exposed knob.

Table 2. TH 192 DN & DNV Thermostat Chassis Part Numbers.

Chassis with Wall Plate

Control

Action

Day and Night

are Direct Acting

Day and Night

are Reverse

Acting

Day and Night

are Direct Acting

with Night Vent

Exposed at

Fahrenheit Celsius Connection

Exposed

Bottom of

Cover

192-204 192-204K 192-224 —

192-205 — 192-225 —

192-206 — 192-226 —

1/2” Knob

on Cover *

Figure 3. TH 192 DNV

Thermostat Connections.

Exposed at

Bottom of

Cover

Exposed

1/2” Knob

on Cover *

Siemens Industry, Inc. Page 3

Technical Instructions
Document Number 155-067P25
October 28, 2010

Covers

See Table 3 for product number and ordering information on TH 192 DN and DNV
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.

a. For white plastic cover option, add “W” suffix code to cover part number

(for example: 192-256W). See Table 2.

a. For white metal cover option, add "H" suffix code to cover part

(for example: 192-356H). See Table 3.

Table 3. TH 192 DN & DNV Thermostat Cover Part Numbers.

Setpoint

Adjustment

Key

(See Note 1)

Key (Night),

Cover Configuration Cover Part Number

(See Note 2)

Thermometer

Concealed 192-262 192-362 Concealed

Exposed

Concealed 192-269 192-369

Setpoint

Indicator

Concealed

Exposed

Standard

Plastic Cover

Standard

Metal Cover

192-264 192-364

Exposed 192-270 192-370
Exposed

192-271 192-371

Exposed (Day)

(See Note 1)

1. Key setpoint adjustment cover required for all thermostat chassis with
optional 1/2-inch, large setpoint adjustment knobs.

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.

Page 4 Siemens Industry, Inc.