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Siemens Building Technologies, Inc.

Landis Division

Powers

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Controls

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Document No. 155-067P25

TH 192-3

Rev. 1, July, 1999

TH 192 DN Day-Night and

TH 192 DNV Day-Night-Vent

Room Thermostat

TH0357R1

POWERS

6050 70 80

DAY

Des

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The TH 192 DN & DNV thermostats are proportional single output, dual set point,

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

set point 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 set

point respectively. 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.

tur

urur

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eses

•

Direct and reverse acting for day and night modes (DN models)

•

Two separate adjustable temperature set point 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 set point

•

Individual field adjustable sensitivity with graduated scale for each mode

•

Integral field adjustable limit stops

•

Control pressure test port accessible without removing cover

•

Easily replaceable thermometer, set point dials, filters, and restrictor plate

•

Fahrenheit or Celsius set point dials

•

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

key, or exposed knob adjustment and set point adjustment

•

Standard plastic thermostat covers provide desert beige or white finish

Summary of content (14 pages)

PAGE 1
Tec Technical In Instruction Document No. 155-067P25 TH 192-3 Rev. 1, July, 1999 Powers™ Controls TH 192 DN Day-Night and TH 192 DNV Day-Night-Vent Room Thermostat 60 70 80 TH0357R1 70 70 80 DAY 50 POWERS Desc escription The TH 192 DN & DNV thermostats are proportional single output, dual set point, 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.
PAGE 2
Technical Instruction Document No. 155-067P25 Rev.
PAGE 3
TH 192 DN Day-Night and DNV Day-Night-Vent Room Thermostat Technical Instruction 155-067P25 Rev. 1, July, 1999 Piping Figure 3. TH 192 DNV Thermostat Conne nnections. Figure 2. TH 192 DN Thermostat Conne nnections. Produc duct Numbers and Orde rdering Information Chassis 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.
PAGE 4
Technical Instruction Document No. 155-067P25 Rev. 1, July, 1999 Covers See Table 3 for product number and ordering information on TH 192 DN & DNV 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.
PAGE 5
TH 192 DN Day-Night and DNV Day-Night-Vent Room Thermostat Technical Instruction 155-067P25 Rev. 1, July, 1999 Table 4. TH 192 192 DN & DNV Thermostat Suffi ffix Letters for Optional Cover Part Numbers. NOTE: For color samples, order color reference guide 152-178P10.
PAGE 6
Technical Instruction Document No. 155-067P25 Rev. 1, July, 1999 Access Accesso essories See the following Technical Bulletins for information on accessories. Technical Bulletin 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 Document ent Number 155-244 155-245 155-231 155-222 155-255 155-213 Dimensions Figure 4. TH 192 DN & DNV Dimensions in Inches (Millim illimeters).
PAGE 7
TH 192 DN Day-Night and DNV Day-Night-Vent Room Thermostat Manual Selector Switch A manual selector switch allows an individual thermostat to control at its day setting even though the remainder of the system is controlling at its night setting. • • • • Day-Night-Vent Operation Technical Instruction 155-067P25 Rev. 1, July, 1999 In the normal AUTO position, the manual selector switch does not interfere with air passage to the changeover relay.
PAGE 8
Technical Instruction Document No. 155-067P25 Rev. 1, July, 1999 Change ngeover Point Adjustment The changeover point is factory set to occur between 19 and 22 psi (131 and 152 kPa). The changeover point can be field adjustable to occur between 14 and 22 psi (96 and 152 kPa). 1. Connect pressure gauge or manometer to measure supply pressure to thermostat. Use 30 psi (207 kPa) supply through a positioning switch so pressure can be fully variable. 2. Determine current change over point.
PAGE 9
TH 192 DN Day-Night and DNV Day-Night-Vent Room Thermostat Lim Limit St Stop Adjustment Technical Instruction 155-067P25 Rev. 1, July, 1999 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.
PAGE 10
Technical Instruction Document No. 155-067P25 Rev. 1, July, 1999 Day Time Calibration Page 10 S t ep 1 — Remove cover using 192-632 calibration tool. Verify room temperature is between 70 and 80°F (21 and 27°C). S t ep 2 — Verify that supply pressure is 18 psi (124 kPa). Set day time 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.
PAGE 11
TH 192 DN Day-Night and DNV Day-Night-Vent Room Thermostat Technical Instruction 155-067P25 Rev. 1, July, 1999 Night Time Calibration S t ep 1 — If not already done, remove cover using 192-632 calibration tool. Verify room temperature is between 70 and 80°F (21 and 27°C). S t ep 2 — Verify that supply pressure is 25 psi (172 kPa). Set night time dial to room temperature by turning the exposed adjustment knob or using a hex key as shown.
PAGE 12
Technical Instruction Document No. 155-067P25 Rev. 1, July, 1999 Troubl ubleshooting Before troubleshooting thermostat per Table 5, make certain there is clean dry supply air at 18 psi (124 kPa) for day control and 25 psi (172 kPa) for night. 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 left side. Figure 10.
PAGE 13
TH 192 DN Day-Night and DNV Day-Night-Vent Room Thermostat Chassi ssis Tube ube Conne nnector and Rest estrictor Plate Replacement Technical Instruction 155-067P25 Rev. 1, July, 1999 1. Remove thermostat chassis from wall. Terminal does not have a ball check valve. NOTE: 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.
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Technical Instruction Document No. 155-067P25 Rev.