Siemens SQM45 Series User manual

CC1N7814en

31.10.2002

Siemens Building Technologies

HVAC Products

ISO 9001

7814

Actuators SQM45...

SQM48...

for air dampers and control valves of oil and gas burners

Electromotoric actuators

·Torques: – SQM45... up to 3 Nm

– SQM48... up to 20 Nm

– SQM48.6... up to 35 Nm

·Running times: 1) – SQM45... 10 ... 120 s

– SQM48... 30 ... 120 s

– SQM48.6... 60 ... 120 s

1) Depending on the basic unit (LMV...)

·Versions: – Choice of drive shafts (refer to «Type summary»)

The SQM45... / SQM48... and this Data Sheet are intended for use by OEMs which

integrate the actuators in their products!

Use

The actuators of the SQM45... / SQM48... range are used to drive gas dampers, air

dampers, oil control valves and other ancillary equipment.

When used in connection with burner controls or electronic fuel / air ratio control, the

associated controlling elements are controlled depending on burner output.

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Siemens Building Technologies CC1N7814en

HVAC Products 31.10.2002

Warning notes

To avoid injury to persons, damage to property or the environment, the following

warning notes should be observed!

Do not open, interfere with or modify the actuators!

·Ensure protection against electric shock hazard by providing adequate protection

for the connection terminals

·Check to ensure that wiring is in an orderly state and that the wires are firmly con-

nected

Mounting notes

·Ensure that the relevant national safety regulations are complied with

·The connection between actuator drive shaft and controlling element must be rigid

with no mechanical play

Possible connection with drive shaft or hub:

·Groove with Woodruff key

·Drive shaft with flat edge and matching counterpiece

To avoid inadmissible loads on bearings caused by rigid hubs, it is recommended to

use compensating clutches with no mechanical play (e.g. metal bellows clutches).

Only the specified cable may be used (refer to Basic Documentation P7550). The ca-

ble’s shielding must be connected to the printed circuit board using the tab provided.

Ensure that the actuator’s housing is connected to functional earth (FE) of the system.

If necessary, remove isolating layers of paint from the fixing points on the burner’s

casing or run separate earth wires.

For detailed information, refer to «Installation Inctructions for the LMV5x system»

J7550.1.

CAN bus

AGG5.6...

SQM4...

Basicunit

LMV5...

7814z03e/0502

The working range is given on the type field and must be observed when mounting the

actuator. To ensure the actuator is accurately located on the burner, a positioning pin of

6 mm diameter must be fitted on the mounting surface.

Positive connection

Cable and cable

shielding

Working range of

actuator

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HVAC Products 31.10.2002

To ensure degree of protection IP 54, suitable Pg glands must be fitted in the actua-

tor’s Pg11 openings.

The Pg glands used must feature cable strain relief.

To ensure degree of protection IP 54 during the actuator’s entire service life, the bear-

ing of the drive shaft must be located such that it will not be directly exposed to water or

dust.

SQM4...

Mounting plate SQM4...

Secure coupling piece to drive shaft

such that intermediate plastic

piece has an axial play of about

0.2 to 0.5 mm

Mounting plate VKF41...

Spacer

VKF41...

7814z02e/0502

ASK33.4

Installation notes

·Installation work must be carried out by qualified staff

·Always run the high-voltage ignition cables separate from the unit and other cables

while observing the greatest possible distance

·To ensure protection against electric shock hazard, make certain that the AC 230 V

section of the SQM4... is strictly segregated from the functional low-voltage section

·The holding torque is reduced when the actuator’s power supply is switched off

The housing cover may only be removed for short periods of time for wiring or when

making the addressing. It must be made certain that dust or dirt will not get inside the

actuator while such work is carried out.

The actuator contains a printed circuit board with ESD-sensitive components.

The top side of the board carries a cover which affords protection against direct con-

tact. This protective cover may not be removed! The underside side of the board may

not be touched.

Addressing (assignment of functions) defines whether the SQM4... shall operate as a

·fuel actuator

·air damper actuator, or

·auxiliary actuator,

and is made with the display and operating unit AZL... and the addressing button on the

actuator, which is located under the housing cover (refer to Basic Documentation

P7550).

The correct assignment of actuator functions can be checked with the help of flashing

LEDs.

For the maximum permissible cable length, refer to the Basic Documentation.

Cabling must be strictly serial (no branching permitted!).

Commissioning notes

·Commissioning work must be carried out by qualified staff

IP 54

Mounting example

Housing cover

ESD

Addressing

Cable length

Topology

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Siemens Building Technologies CC1N7814en

HVAC Products 31.10.2002

Standards

Conformity to EEC directives

- Electromagnetic compatibility EMC (immunity) 89 / 336 EEC

- Low-voltage directive 73 / 23 EEC

Service notes

·Maintenance work must be carried out by qualified staff

·Each time an actuator has been replaced, check to ensure that wiring is in an or-

derly state and that the wires are firmly connected

When replacing an actuator, the following points must be checked and, if necessary,

corrected:

·Addressing (assignment of functions)

·Bus termination

·Adjustment of the curvepoints of electronic fuel / air ratio control (e.g. with the

LMV51...)

Disposal notes

The actuator contains electrical and electronic components and may not be disposed of

together with household waste.

Local and currently valid legislation must be observed.

Mechanical design

The housing is made of die-cast aluminium.

The cover is made of impact-proof and heat-resistant plastic.

Color of cover: Black

Stepper motor

In connection with the basic unit (e.g. LMV51...): Via the display and operating unit

AZL5X (refer to Basic Documentation P7550).

RAST3.5 terminals (supplied together with the AGG5.720 / AGG5.721).

SQM45...: Spur gears made of plastic with small backlash and permanent lubrication.

SQM48...: Spur gears made of steel with small backlash and permanent lubrication.

Made of black-finished steel, ready fitted to the front of the geartrain (SQM48... uses a

drive shaft made of hardened steel).

The front of the geartrain is used as the mounting surface. The actuator has 4 fixing

holes and 1 elongated hole for the positioning pin.

Alternatively, the actuator can be secured from the side of the controlling element with

3 self-tapping screws.

Replacement

Housing

Actuator

Adjustment of switching

points / position

indication

Electrical connections

Geartrain

Drive shaft

Mounting and fixing

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Siemens Building Technologies CC1N7814en

HVAC Products 31.10.2002

Type summary

Type reference Drive shaft

no.

Running time

(min.)

for 90°

Nominal

torque

(max.)

Holding

torque 2)

(max.)

Radial

bearing

force (max.)

SQM45.291A9 110 3

3) 1.5 190

SQM45.295A9 510 3

3) 1.5 190

SQM48.497A9 7 30 20 4) 20 420

SQM48.697A9 7 60 35 4) 35 800

1) Refer to «Dimensions» 4) Under nominal conditions. Under extreme conditions

2) With operating voltage applied (above +50 °C ambient temperature), the torque is about

3) Under nominal conditions. Under extreme conditions

(below –15 °C ambient temperature), the available torque

is about 15 % lower

15 % lower

Ordering

When ordering, please give type references of actuator and accessories according to

«Type summary».

In addition to the actuator, the following item is to be ordered separately and is also

supplied as a separate item:

·Shielded cable

·Special terminals RAST3.5 as part of the AGG5.720 / AGG5.721 set

Accessories

Accessories must be ordered as separate items.

Adapter for gas valves VKF41...C ASK33.4

Connecting cables AGG5.6...

- Only the specified cables may be used!

- Refer to Basic Documentation P7550

Actuators SQM4...

Legend

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Siemens Building Technologies CC1N7814en

HVAC Products 31.10.2002

Technical data

Operating voltage AC 2 x 12 V via bus cable from the basic

unit or via a separate transformer

Safety class extra low-voltage with safe isolation from

mains voltage

Power consumption

-SQM45...

-SQM48...

9...15 VA

26...34 VA

On time 50 %, max. 3 min. continuously

Angular adjustment max. 90°

Mounting position optional

Degree of protection to EN 60 529, IP 54, provided adequate

cable entries are used

Cable entry SQM45... / SQM48...:

insertable threaded cable glands for

2 x Pg11

Electrical connections RAST3.5 terminals

(for details, refer to the basic unit)

Ferrules matching the dia. of the stranded wire

Direction of rotation can be selected on the basic unit

Torques and holding torques refer to «Type summary»

Reproducibility (typically in the show-room

condition)

±0.2° (when used with the basic unit

LMV51...)

Running times refer to «Type summary» (can be selected

on the basic unit)

Load changes with continuous heavy loads

- SQM45... / SQM48.497

- SQM48.697

typically 500,000

typically 300,000

Weight

-SQM45...

-SQM48...

approx. 1 kg

approx. 1.6 kg

Direction of rotation (when facing the shaft)

-Standard

-Reverse

counterclockwise

clockwise

Transport

Climatic conditions

Mechanical conditions

Temperature range

Humidity

DIN EN 60 721-3-2

class 2K2

class 2M2

-20...+70 °C

< 95 % r.h.

Operation

Climatic conditions

Mechanical conditions

Temperature range

Humidity

DIN EN 60 721-3-3

class 3K5

class 3M2

-20...+60 °C

< 95 % r.h.

Condensation, formation of ice and ingress of water are not permitted!

Actuator

Environment conditions

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Siemens Building Technologies CC1N7814en

HVAC Products 31.10.2002

Function

The SQM45... / SQM48... are of robust design and have a geartrain with only small

backlash.

Control and position feedback take place via a bus system (CAN).

The bus cable is also used for powering the actuators.

The actuators are driven by stepper motors and can be positioned with a resolution of

0.1°.

The characteristics and settings (running time, direction of rotation, limit positions) of

the SQM4... are determined by the controlling basic unit (e.g. LMV5...; for details, refer

to the Basic Documentation of the LMV...).

The running times of the associated controlling elements are varied by the basic unit

depending on the burner’s control phase (e.g. startup phase: short running time; opera-

tion: long running time).

Terminating resistor

At the end of the serial bus cabling, a terminating resistor must be fitted.

For that purpose, a jumper must be set to BUS TERMINATION on the last actuator of

the bus cable, which will activate the resistor.

On all the other actuators, that jumper must be set to the other position (deactivated).

Addressing button

12VAC1

12VAC2

CANH

CANL

GND

7814z01e/1002

LED (function code)

Jumper

Bus

termination

12VAC1

12VAC2

CANH

CANL

GND

Assignment of terminals

The 2 terminal blocks (X1 and X2) are identical.

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Siemens Building Technologies CC1N7814en

HVAC Products 31.10.2002

Dimensions

Dimensions in mm

2.5

+0.05

+0.1

SQM45...

+0.1

1.9

+0.1

ø5.4

ø10

ø16

ø10

ø14

D-shaft

Prepared for self-tapping

screws M5, 10 mm deep,

to DIN 7500

8.5

-0.05

ø18

7814m01e/1102

25.5

2 x Pg11

ø16

SQM45...

SQM48...

228

137

122

25 41

116

Groove for

Woodruff key

3x3.7 to DIN 6888

Groove

for parallel key A5x3x28

to DIN 6885 T3

1.5

SQM45... / SQM48...

ã2002 Siemens Building Technologies

Subject to change!

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