Siemens Powers ET 134 Manuel du propriétaire

Technical Instructions

PowersTM Controls

ET 134 Line Voltage Room

Thermostats

Document No. 155-017P25

ET 134-55

August 27, 2021

134-1083 134-1084 &134-1085

Exposed Knobs

134-1084 & 134-1085

Concealed Adjustment

134-1086

Description The ET 134 series are line voltage, wall mounted thermostats that are available with

exposed or concealed set point adjustment. Models are available with Single-Pole,

Single-Throw (SPST) or Single-Pole, Double-Throw (SPDT) contact action and for

standard-duty (nominal 1/4 hp; 10 amps, non-inductive) or heavy-duty (nominal 1 hp;

22 amps, non-inductive) applications.

Features

134-1083

•Locking cover with Allen screws.

•Concealed auto-off-fan selector switch.

•Adjustable high range stop.

134-1084, 134-1085,

134-1086

•Dual Fahrenheit and Celsius scale thermometers.

•Separable mounting plate for mounting and wiring without removing cover.

•Locking cover with Allen screws.

•Concealed, adjustable low and high range stops.

•Large, exposed set point knob (134-1084 and 134-1085)

•Internal, dual Celsius and Fahrenheit scale.

•Optional blank faceplate included (134-1084 and 134-1085).

Warning/Caution Notations

Siemens Industry, Inc.

Part No. 996-286 Rev. E

WARNING Personal injury/loss of life may occur if a procedure

is not performed as specified.

CAUTION Equipment damage may occur if the user does not

follow a procedure as specified.

Technical Instructions

Document Number 155-017P25

August 27, 2021

ET 134 Line Voltage Room Thermostats

Page 2

Siemens Industry, Inc.

Application These line voltage thermostats control heating, cooling or year-round air conditioning units

in commercial, industrial or residential installations. Typical uses are for unit heaters, fan

coils, blast coils, refrigerated storage rooms, electric heat, duct furnaces, greenhouses,

etc.

WARNING:

Product Number

Specifications

These thermostats are designed for use only as an operating

control. Where an operating control failure would result in

personal Injury and/or loss of property, it is the responsibility of

the installer to add devices (safety, limit controls) or systems

(alarm, supervisory systems) that protect against, or warn of,

control failure.

Table 1. 134-1083 Electrical Ratings.

Description cULus

Volts AC 50/60 Hz 120 208 240

Full load amperes

3.4

Lock rotor amperes 36 20.4 18

Pilot duty 125 VA, 24 Vac to 277 Vac

Table 2. 134-1084 and 134-1086 Electrical Ratings.

Description cULus

Volts AC 50/60 Hz 120 208 240 277

Full load amperes 12 6.9



Lock rotor amperes 72 41.4 30 

Resistive amperes 10 10 10 10

Pilot duty 125 VA, 24 Vac to 277 Vac

Table 3. 134-1085 Electrical Ratings.

Description cULus

Volts AC 50/60 Hz 120 208 240 277

Full load amperes 16 9.2



Lock rotor amperes 96 55.2 48 

Resistive amperes 22 22 22 22

Pilot duty 125 VA, 24 Vac to 277 Vac

Siemens Industry, Inc.

Page 3

ET 134 Line Voltage Room Thermostats

Technical Instructions

Document Number 155-017P25

August 27, 2021

Table 4. Product Numbers and Specifications.

Product

Number

Set Point

Adjustment

Dual Set Point

Range

F (

Differential °F(°C)

Switch

Action

Weight Ibs. (kg)

134-1083

Concealed

40 to 90

(5 to 32)

1.8

(1)

SPST with

"AUTO-OFF

FAN" Switch

1.3

(0.6)

134-1084

*Exposed

Knob, or

Concealed

1.8 (1) Htg.

2.3 (1.3) Clg.

SPDT

Heating/Cooling

1.0

(0.45)

134-1085 3 (1.7) Htg.

3.5 (2) Clg.

134-1086 Concealed 1.8

(1)

SPST

open on

Temperature rise

Heating only

1.0

(0.45)

Approval UL File E35198

*Each thermostat is shipped with a blank faceplate for use when concealed adjustment is desired.

Table 5. Conformity Declaration.

Information 134-1083 134-1084, 134-1085, 134-1086

Purpose of control Line voltage thermostats

Construction of control Electromechanical independently mounted control

Number of cycles

100K cycles (auto reset switch)

6K cycles (manual operated rotary

switch)

100K cycles (auto reset switch)

Method of mounting control Two cross key holes slots in base of case for mounting to a vertical outlet box 2 ×

4 in. (51 × 102 mm)

Method of grounding of control

Wiring binding screw terminal

Type 1 or Type 2 action

Type 1.C (micro-interruption)

External pollution

Pollution degree 3

Internal pollution

Pollution degree 2

Rated impulse voltage

4,000 Vac

Ball pressure temperature

Auto reset switch component: 302°F (150°C)

Field wiring rating

Use copper conductors only

Switch

SPST: 134-1083, with 3 position rotary

switch

SPST: 134-1086

SPDT: 134-1084, 134-1085

Enclosure

UL: TYPE 1 (NEMA)

Wiring connection

Screw type terminals, terminal

identification molded in the block

Screw type terminals, terminal

identification labelled on the barrier

Ambient conditions

32°F to 105°F (0°C to 40°C)

Compliance

North America

cULus listed; UL 60730, E60730, File E35198

Page 4

Siemens Industry, Inc.

Technical Instructions

Document Number 155-017P25

August 27, 2021

ET 134 Line Voltage Room Thermostats

Mounting The proper location of a heavy-duty room thermostat is very important to ensure good

performance.

•Make sure the thermostat is in a place where air circulates around it freely.

•Never install the thermostat on or near an outside wall.

•Keep the thermostat away from windows and doors.

•Do not locate the thermostat too close to a strong light or any other false source of

heat such as direct sunlight, steam lines, etc.

•Mount the thermostat on a post or partitioning wall, but make sure that there are no

pipes or duct work in that wall or in the other side of the wall.

•Mount in a vertical position.

Wiring

WARNING:

Disconnect the power supply before wiring connections are made to

avoid possible electrical shock or equipment damage.

Make all wiring connections using copper conductors only and in accordance with the

National Electrical Code and local regulations. Loads exceeding the rating of the

thermostat should be handled by means of a relay or motor starter.

•Install an electrical conduit box for the thermostat.

•Pull the required wires to this box.

CAUTION:

Use terminal screws furnished (No. 8-32 × 1/4-inch binder head

screw). Substitution of other screws can cause problems in making

proper connections.

Service There is no servicing of the thermostat. Replace if inoperative.

Siemens Industry, Inc.

Page 5

ET 134 Line Voltage Room Thermostats

Technical Instructions

Document Number 155-017P25

August 27, 2021

Installation of

134-1083

Read the Mounting and Wiring sections.

1. Make the wiring connections to the numbered terminals on the back of the

thermostat. Figure 1 shows typical wiring diagrams.

Typical Auto-Off-Fan application for

134-1083 thermostat.

Typical heating application for

134-1084, 134-1085, 134-1086

thermostats.

Typical cooling application for

134-1084, and 134–1085

thermostats.

Figure 1. Wiring Diagrams.

2. Remove the thermostat cover by loosening the Allen screws at the top and bottom of

the thermostat. The Allen wrench is included with the thermostat.

3. Mount the thermostat to the box using the two keyhole openings in the thermostat

base.

4. Set the high temperature cut-out stop.

a. Turn the thermostat dial so the desired high temperature setting minus one

degree is at the pointer. See Figure 2.

b. Loosen the stop screw and slide the screw toward the back of the dial against the

step behind the dial.

c. Tighten the stop screw.

5. Set the desired temperature. Turn the dial to the pointer located at the nine o’clock

position. See Figure 2.

6. Turn the selector switch so that desired AUTO, OFF, or FAN reads vertically. See

Figure 2.

7. Replace the thermostat cover. Tighten the screws on the bottom and top of the

thermostat.

The installation is now complete.

Page 6

Siemens Industry, Inc.

Technical Instructions

Document Number 155-017P25

August 27, 2021

ET 134 Line Voltage Room Thermostats

Figure 2. Interior View of the 134-1083.

Figure 3. Mounting a 134-1084, 134-1085 or 134-1086 Thermostat to a Conduit Box.

Siemens Industry, Inc.

Page 7

ET 134 Line Voltage Room Thermostats

Technical Instructions

Document Number 155-017P25

August 27, 2021

Installation of

134-1084, 134-1085,

134-1086

Read the Mounting and Wiring sections.

1. Do not remove the thermostat cover to install.

2. Remove the mounting plate from the back of the thermostat by unscrewing the

mounting plate locking screw (see Figure 3) with the Allen wrench provided.

3. Fasten the plate to the conduit box with the screws provided on the mounting plate.

4. Make the wiring connections to the terminals on the back of the thermostat. Terminal

number 1 identification is stamped on the terminal block. See Figure 1 for typical

wiring diagrams.

5. Hook the two slots in the back of the thermostat over the prongs of the mounting

plate. Swing the thermostat into position on the plate.

6. Tighten the mounting plate locking screw.

The installation is now complete.

Adjustments

To remove the thermostat

cover

1. Pull off the knob.

2. Loosen the thermostat cover screw with the Allen wrench provided.

To convert to concealed

adjustment

1. Remove the thermostat cover by loosening the Allen screws at the top and bottom of

the thermostat. The Allen wrench is included with the thermostat.

2. Peel off the backing from the enclosed faceplate.

3. Position the new faceplate over the factory-installed faceplate.

4. Press firmly onto the cover.

5. Set the thermostat dial by lining up the desired set point at the nine o'clock position.

6. Replace the cover and tighten the thermostat cover screw.

To set high and low range

stops

See Figure 4

1. Before the cover is removed, set the dial to the maximum stop setting.

2. Pull off the knob.

3. Hold the dial firmly, press tab "A", and rotate the tab clockwise until it stops against

stop “C”.

4. Release the tab and be sure it snaps into the desired notch.

5. Set the dial at the lowest temperature stop setting desired.

6. Hold the dial firmly, press tab "B" and rotate it counter clockwise until it stops against

stop “C”.

7. Release the tab and be sure it snaps into the desired notch.

8. Replace the cover, tighten the cover screw, and push on the knob.

9. Rotate the knob to the desired setting.

Figure 4. Interior of 134-1084, 134-1085 and 134-1086 Thermostats with High

and Low Adjustment Stops.

Technical Instructions

Document Number 155-017P25

August 27, 2021

ET 134 Line Voltage Room Thermostats

Dimensions

Dimensions in Inches

(Millimeters)

Figure 5. Dimensions of the 134-1083 Thermostat.

Figure 6. Dimensions of the 134-117

Thermostat Guard.

Figure 7. Dimensions of 134-1084, 134-1085 and 134-1086 Thermostats.

Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as

design improvements are introduced. Powers is a registered trademark of Siemens Industry, Inc. Other product or company names mentioned

Siemens Industry, Inc.

Smart Infrastructure

1000 Deerfield Parkway

Buffalo Grove, IL 60089

Your feedback is important to us. If you have

comments about this document, please send them

to sbt_technical.editor.us.sbt@siemens.com

Document No. 155-017P25

Printed in the USA

Page 8

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