Siemens Powers TH 192 S Manuel du propriétaire

Siemens Building Technologies, Inc.

Landis Division

120

Powers™Controls

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Document No. 155-065P25

TH 192-1

Rev. 1, July, 1999

TH 192 S Single Temperature Room

Thermostat

80

70

TH0355R1

POWERS

6050 70 80

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nThe TH 192 S thermostats are proportional single output, single set point, 1-pipe (low

air capacity) or 2-pipe (high air capacity) sensor controllers. Each thermostat includes a

wall mounting plate for installation in a variety of rough-in terminal boxes. A sensitive

bimetal responds to temperature change to modulate control air through a flapper

nozzle. One set point dial is provided. Air connections are made with 5/32” (4 mm) OD

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.

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es •Direct and reverse acting models for one and two-pipe

•Fahrenheit or Celsius set point dials

•Highly sensitive bimetal thermostatic element

•Field adjustable sensitivity with graduated scale

•Integral field adjustable limit stops

•Control pressure test port accessible without removing cover

•Easily replaceable thermometer, set point dial, filters, and restrictor plate

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

key, or exposed knob adjustment and set point indication

•Standard plastic thermostat covers provide desert beige or white finish

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•Competitor adapter mounting kits available

•Metal covers available in standard configurations with a variety of finishes

•All thermostat chassis available with optional 1/2” large set point adjustment knobs

Technical Instruction

Document No. 155-065P25

Rev. 1, July, 1999

Page 2 Siemens Building Technologies, Inc.

Landis Division

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nTH 192 S thermostats are temperature sensing devices that control pneumatic valve

and damper actuators in heating and cooling applications such as air conditioners, space

heaters, unit ventilators, and air volume controllers. The thermostats maintain energy

management (maximum economy) and occupant comfort. TH 192 S thermostats are

available with covers that conceal or expose the set point adjustment dial.

Use TH 192 S 1-pipe thermostats with an external restrictor (20 scim, 5.4 ml/sec) where

a limited air capacity operates a single valve and/or actuator. Use TH 192 S 2-pipe

thermostats where multiple valves and actuators, used with or without high/low limiting

controls, require higher air capacities.

R1

DA

HOT

WATER

N.O. VALVE

CHILLED WATER

N.C. VALVE

S

EXTERNAL RESTRICTOR

1 - PIPE

DIAGRAM 1

R1

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CHILLED

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SS

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EXTERNAL RESTRICTOR

1 - PIPE 2 - PIPE

DIAGRAM 2 DIAGRAM 3

R1

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N.C. VALVE

S

2 - PIPE

DIAGRAM 4

NOTE: DOTTED LINES ARE ALTERNATIVE CONTROL SCHEMES.

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.

TH 192 S Single Temperature Room Thermostat Technical Instruction

155-065P25

Rev. 1, July, 1999

Siemens Building Technologies, Inc. Page 3

Landis Division

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Chassis See Table 1 for product number and ordering information on TH 192 S thermostat

chassis.

1. Is a one-pipe (low air capacity) or two-pipe (high air capacity) connection required

for application?

2. Is a Fahrenheit or Celsius scale required?

3. Is the control action direct or reverse acting?

a. Direct acting: An increase in temperature increases the control air pressure.

b. Reverse acting: An increase in temperature decreases the control air

pressure.

4. Where is set point adjustment knob located?

a. Adjustment knob located at bottom of chassis.

b. Adjustment knob on front with 1/2” large exposed knob.

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Two-pipe,

relay

192-202 192-203 192-222 192-223Exposed

at Bottom

of Cover One-pipe,

non-relay

192-200 192-201 192-220 192-221

Two-pipe,

relay

192-202K 192-203K 192-222K 192-223K

Exposed

1/2” Knob

on Cover * One-pipe,

non-relay

192-200K 192-201K 192-220K 192-221K

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

See Table 2.

Technical Instruction

Document No. 155-065P25

Rev. 1, July, 1999

Page 4 Siemens Building Technologies, Inc.

Landis Division

Covers See Table 2 for product number and ordering information on TH 192 S thermostat

covers.

1. Is the set point adjustment exposed for customer adjustment or concealed to

prevent alteration of setting?

2. Is the thermometer exposed or concealed?

3. Is the set point 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?

a. Standard cover is plastic, desert beige color.

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

(e.g., 192-256W).

b. Optional covers are plastic or metal and available in a variety of colors per

Table 3.

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Concealed 192-256 192-356Concealed

Exposed

Concealed

192-254 192-354

Concealed 192-265 192-365Key

(See Note 1) Exposed 192-266 192-366

Concealed 192-250 192-350Exposed

Exposed

192-252 192-352

1. Key set point adjustment cover required for all thermostat chassis with

optional 1/2” large set point adjustment knobs.

2. To order an optional thermostat cover finish, add the appropriate suffix

letter listed in Table 3 to the end of the part number listed in Table 2.

TH 192 S Single Temperature Room Thermostat Technical Instruction

155-065P25

Rev. 1, July, 1999

Siemens Building Technologies, Inc. Page 5

Landis Division

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:For color samples, order color reference guide 152-178P10.

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None Plastic

(standard)

Desert Beige D #10 Special

Bronze

W Plastic

(optional)

White E Brushed

Electro-plated

Satin Chrome

None Metal

(standard)

Desert Beige F Sierra Gold

A #1 Silver G Brushed

Aluminum

B#5 Satin

Chrome

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Metal

(optional)

#7 Light

Statuary Bronze

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(optional)

White

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sControl action See Table 1.

Operating range 45 to 85°F (7 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)

Two pipe 20 scim (5.5 ml/sec)

Temperature

Storage temperature -10 to 140°F (-23 to 60°C)

Ambient operating temperature 40 to 140°F (4 to 60°C)

Temperature response 0.1°F (0.06°C)

Dial graduations 2°F (1°C)

Technical Instruction

Document No. 155-065P25

Rev. 1, July, 1999

Page 6 Siemens Building Technologies, Inc.

Landis Division

S

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(Continued)

Factory settings

Calibration @ 72°F (22°C) 7.5 psi (52 kPa)

Sensitivity 2.5 psi/°F (31 kPa/°C)

Limit stop adjustment 45 and 85°F (7 and 30°C)

Standard cover Cycolac, desert beige

Shipping weight 0.7 lbs. (0.3 kg)

Dimensions See Figure 4.

Acc

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TB 237 Terminal Kits

TB 213 Aspirator Wall Box Kit

TB 214 Adapter Kits

TB 193 Guard Kit

TB 241 Test Head Kit

TB 167 Restrictors

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155-244

155-245

155-231

155-222

155-255

155-213

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nIn the TH 192 S direct acting thermostat, an increase in temperature increases the

control air pressure and a decrease in temperature decreases the control pressure.

In the TH 192 S reverse acting thermostat, an increase in temperature decreases the

control air pressure and a decrease in temperature increases the control pressure.

45 50 55 60 65 70 75 80 85F

18137 24 30C

15 PSI

(103 KPA)

7.5PSI

(52 KPA)

3 PSI

(21 KPA)

TEMPERATURE

OUTPUT PRESSURE

DIRECT ACTING

FACTORY SET

POINT CONDITIONS

REVERSE ACTING

0

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..

.

TH 192 S Single Temperature Room Thermostat Technical Instruction

155-065P25

Rev. 1, July, 1999

Siemens Building Technologies, Inc. Page 7

Landis Division

T

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1. Use a test thermometer to read the current room temperature.

2. Place a screwdriver in the center of the thermometer assembly (Figure 6). Carefully

rotate thermometer assembly until pointer tip indicates the correct room

temperature.

N

NN

NO

OO

OT

TT

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::

:Avoid breathing on or touching the bimetal spiral since this affects the

temperature reading.

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Thermostat limit stops define the

minimum and maximum thermostat set

points. The limit stops engage in the set

point cam gear teeth and cause

interference between the set point cam

gear and the adjustment knob gear.

To change limit stop settings, use needle

nose pliers to pull limit stop between the

set point cam gear teeth. Rotate limit

stop to its new position. Do not pull limit

stop any more than necessary to clear

the gear teeth. Changing the limit stop

position one gear tooth changes the limit

stop setting by 1-1/3°F (0.7°C).

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192

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.

Technical Instruction

Document No. 155-065P25

Rev. 1, July, 1999

Page 8 Siemens Building Technologies, Inc.

Landis Division

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To change thermostat sensitivity, use a flat blade

screwdriver to carefully move the sensitivity slide to

the desired position as follows:

Graduation

closest to the

rigid end of

the bimetal

element

4 psi/°F

(50 kPa/°C)

Graduation

closest to the

minimum

(MIN) end of

the bimetal

element

1 psi/°F

(12 kPa/°C)

N

NN

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TT

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E:

::

:If the thermostat sensitivity is adjusted,

the thermostat must be recalibrated.

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The thermostat is factory calibrated to a control pressure of 7.5 psi (52 kPa) when the set

point and the ambient temperature are both at 72°F (22°C). The factory sensitivity setting

is approximately 2.5 psi/°F (31 kPa/°C). No adjustments are required if these settings are

appropriate for the application. If the thermostat has been tampered, the sensitivity

changed, or is out of adjustment, use the following steps to re-calibrate the instrument.

S

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11

1 —

Remove cover using 192-632 calibration

tool. Verify room temperature is between

70 and 80°F (21 and 27°C).

S

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22

2 —

Verify that supply pressure is 18 psi

(124 kPa). Set dial to room temperature by

turning the exposed adjustment knob or

using a hex key as shown. Allow

thermostat to stand for about five minutes

to adjust to the new setting.

TH 192 S Single Temperature Room Thermostat Technical Instruction

155-065P25

Rev. 1, July, 1999

Siemens Building Technologies, Inc. Page 9

Landis Division

S

SS

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33

3 —

Moisten needle and insert 192-633 test

gauge and needle adapter in a test port.

Read control pressure.

S

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44

4 —

If control pressure does not read 7 to 8 psi

(48 to 55 kPa), turn calibration screw using

192-632 calibration tool or 1/8” (3.2 mm)

wrench until pressure is 7 to 8 psi (48 to

55 kPa). The sensing element is now in

calibration and the set point can be

changed to the desired room temperature.

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ng Before troubleshooting thermostat per Table 4, make certain there is clean dry supply air

at 18 psi (124 kPa) minimum. Use test probe gauge and needle adapter to measure

control pressure at thermostat test port.

The output pressure test port is accessible without removing the thermostat cover

through the 8th opening from the top. For one-pipe thermostats, the port is on the right

side. For two-pipe thermostats, the port is on the left side.

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.

Technical Instruction

Document No. 155-065P25

Rev. 1, July, 1999

Page 10 Siemens Building Technologies, Inc.

Landis Division

T

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Air supply Low supply pressure As required

Nozzle or flapper Dirt on nozzle or

flapper

Clean nozzle or replace

thermostat

Restrictor Clogged restrictor Replace restrictor

Control pressure

stays at

approximately zero

Calibration Out of calibration Recalibrate

Nozzle Clogged nozzle Clean nozzle or replace

thermostat

Control pressure

stays at

approximately

supply pressure Calibration Dirt on either supply

or exhaust valve seat

Alternately close and

open nozzle by gently

pushing down the

bimetal

Excessive air

leakage from

exhaust port on

left side of

thermostat

Supply and return

line connection

Connections are

interchanged or

connection to port is

incorrect

As required

C

CC

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1. Remove thermostat chassis from wall. Terminal does not have a ball check valve.

N

NN

NO

OO

OT

TT

TE

EE

E:

::

:You must close off the supply air. For example, use a connector with the

supply air terminal plugged.

2. Remove two Phillips head screws from connector on back of thermostat chassis.

Pull connector out of recess. If necessary, pry connector loose with a screw driver,

but be careful not to damage restrictor plate and gasket.

3. Remove gasket from under connector. Remove restrictor. Remove second gasket

from under restrictor.

4. Use restrictor replacement kit 192-321 to replace gasket, restrictor, and second

gasket.

N

NN

NO

OO

OT

TT

TE

EE

E:

::

:The restrictor plate is keyed to ensure proper orientation during installation.

5. Remove filters from existing connector and insert in new connector. Or, if filters are

dirty, use restrictor replacement kit 192-321 to replace filters.

6. Use chassis tube connector replacement kit 192-525 to replace connector and

mounting screws.

Siemens Powers TH 192 S Manuel du propriétaire

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