WIKA A50 User manual

ES

FR

DE

EN

Operating instructions

Betriebsanleitung

Mode d'emploi

Manual de instrucciones

Bimetal thermometers

for heating, ventilation and air-conditioning

Bimetall-Thermometer

für Heizungs-, Klima- und Lüftungstechnik

Thermomètres bimétalliques

pour le chauffage, la ventilation et la climatisation

Termómetros bimetálicos

para la calefacción, ventilación y climatización

Model A43

Model A48

Model E45

Model A50

Model A46

Model A51

ES

FR

DE

EN

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WIKA operating instructions bimetal thermometers for HVAC

WIKA

®

is a registered trademark in various countries.

WIKA

®

ist eine geschützte Marke in verschiedenen Ländern.

Prior to starting any work, read the operating instructions!

Keep for later use!

Vor Beginn aller Arbeiten Betriebsanleitung lesen!

Zum späteren Gebrauch aufbewahren!

Lire le mode d‘emploi avant de commencer toute opération !

A conserver pour une utilisation ultérieure !

¡Leer el manual de instrucciones antes de comenzar cualquier trabajo!

¡Guardar el manual para una eventual consulta!

Operating instructions bimetal thermometers Page 3 - 22

Betriebsanleitung Bimetall-Thermometer Seite 23 - 42

Mode d'emploi thermomètres bimétalliques Page 43 - 62

Manual de Instrucciones de termómetros

bimetálicos

Página 63 - 81

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Contents

1. General information 4

2. Design and function 5

3. Safety 6

4. Transport, packaging and storage 9

5. Commissioning, operation 10

6. Faults 15

7. Maintenance and cleaning 16

8. Dismounting, return and disposal 17

9. Specifications 18

Contents

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1. General information

■

The bimetal thermometers described in the operating instructions have been

manufactured using state-of-the-art technology. All components are subject to stringent

quality and environmental criteria during production. Our management systems are

certified to ISO 9001 and ISO 14001.

■

These operating instructions contain important information on handling the instrument.

Working safely requires that all safety instructions and work instructions are observed.

■

Observe the relevant local accident prevention regulations and general safety

regulations for the instrument's range of use.

■

The operating instructions are part of the product and must be kept in the immediate

vicinity of the instrument and readily accessible to skilled personnel at any time. Pass

the operating instructions on to the next operator or owner of the instrument.

■

Skilled personnel must have carefully read and understood the operating instructions

prior to beginning any work.

■

The general terms and conditions contained in the sales documentation shall apply.

■

Subject to technical modifications.

■

Further information:

- Internet address: www.wika.de / www.wika.com

- Relevant data sheet: TM 43.01 (model A43)

TM 45.02 (model E45)

TM 46.02 (model A46)

TM 48.01 (model A48)

TM 50.03 (model A50)

TM 51.01 (model A51)

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2. Design and function

2.1 Overview (example)



Case and dial



Stem



Thermowell



Mounting flange



Mounting clip



Temperature sensor



Attachment plate

2.2 Description

The bimetal thermometers described here are used for simple temperature indication,

predominantly in the heating, ventilation and air-conditioning industry.

Bimetal thermometers utilise the different properties of two metals for temperature

measurement. These are in the form of thin metal strips laid on top of each other. The

design of these thermometers is very simple. The combined metal strips are arranged

around a pointer in a spiral. On a change, the bimetal moves the pointer and indicates the

temperature on a scale.

Model A46.11, contact probeModel A43

Model A48















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2. Design and function / 3. Safety

The models A43, E45, A46, A50 and A51 are particularly suited to application in heating

technology.

For applications in ventilation and air-conditioning, the models A48 and A51 are available.

2.3 Scope of delivery

Cross-check scope of delivery with delivery note.

Depending on the instrument version, the instrument can be delivered with loose

accessory components (e.g. thermowell, mounting flange, mounting clip).

3. Safety

3.1 Explanation of symbols

WARNING!

... indicates a potentially dangerous situation that can result in serious injury

or death, if not avoided.

CAUTION!

... indicates a potentially dangerous situation that can result in light injuries or

damage to equipment or the environment, if not avoided.

WARNING!

... indicates a potentially dangerous situation that can result in burns, caused

by hot surfaces or liquids, if not avoided.

Information

... points out useful tips, recommendations and information for efficient and

trouble-free operation.

3.2 Intended use

The bimetal thermometers are mainly used in heating, air-conditioning and refrigeration

equipment to monitor the process temperature.

The models A43, A46, A50 and A51 are used for temperature measurements on liquid and

gaseous media with the use of a suitable thermowell.

Max. permissible operating pressure at thermowell: 6 bar

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3. Safety

Model A46.11 is suitable for the measurement of pipe surface temperatures.

The models A48 and A51 are used in refrigeration and air-conditioning technology for

measuring the temperature in air ducts. They are only suitable for the measurement of

gaseous, non-hazardous and also non-pressurised media.

When installing, commissioning and operating these instruments, observe the appropriate

national safety regulations.

The instruments are not approved for use in hazardous areas!

The instruments are not suitable for outside use and must be protected from direct sunlight

and moisture.

The instruments have been designed and built solely for the intended use described here,

and may only be used accordingly.

The technical specifications contained in these operating instructions must be observed.

Improper handling or operation of the instrument outside of its technical specifications

requires the instrument to be taken out of service immediately and inspected by an

authorised WIKA service engineer.

The manufacturer shall not be liable for claims of any type based on operation contrary to

the intended use.

3.3 Improper use

WARNING!

Injuries through improper use

Improper use of the instrument can lead to hazardous situations and injuries.

▶

Refrain from unauthorised modifications to the instrument.

▶

Do not use the instrument within hazardous areas.

▶

Do not use the instrument with abrasive or viscous media.

Any use beyond or different to the intended use is considered as improper use.

Do not use this instrument in safety or emergency stop devices.

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3.4 Responsibility of the operator

The instrument is used in the industrial sector. The operator is therefore responsible for

legal obligations regarding safety at work.

The safety instructions within these operating instructions, as well as the safety, accident

prevention and environmental protection regulations for the application area must be

maintained.

To ensure safe working on the instrument, the operating company must ensure

■

that suitable first-aid equipment is available and aid is provided whenever required.

■

that the operating personnel are regularly instructed in all topics regarding work safety,

first aid and environmental protection and know the operating instructions and in

particular, the safety instructions contained therein.

■

that the instrument is suitable for the particular application in accordance with its

intended use.

■

that personal protective equipment is available.

3.5 Personnel qualification

WARNING!

Risk of injury should qualification be insufficient!

Improper handling can result in considerable injury and damage to equipment.

▶

The activities described in these operating instructions may only be carried

out by skilled personnel who have the qualifications described below.

Skilled personnel

Skilled personnel, authorised by the operator, are understood to be personnel who, based

on their technical training, knowledge of measurement and control technology and on

their experience and knowledge of country-specific regulations, current standards and

directives, are capable of carrying out the work described and independently recognising

potential hazards.

Special operating conditions require further appropriate knowledge, e.g. of aggressive

media.

3. Safety

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4. Transport, packaging and storage

4.1 Transport

Check the instrument for any damage that may have been caused by transport.

Obvious damage must be reported immediately.

CAUTION!

Damage through improper transport

With improper transport, a high level of damage to property can occur.

▶

When unloading packed goods upon delivery as well as during internal

transport, proceed carefully and observe the symbols on the packaging.

▶

With internal transport, observe the instructions in chapter 4.2 “Packaging

and storage”.

If the instrument is transported from a cold into a warm environment, the formation of

condensation may result in instrument malfunction. Before putting it back into operation,

wait for the instrument temperature and the room temperature to equalise.

4.2 Packaging and storage

Do not remove packaging until just before mounting.

Keep the packaging as it will provide optimum protection during transport (e.g. change in

installation site, sending for repair).

Permissible conditions at the place of storage:

■

Storage temperature: -20 ... +60 °C

■

Humidity: 35 ... 85 % relative humidity (non-condensing)

Avoid exposure to the following factors:

■

Direct sunlight or proximity to hot objects

■

Mechanical vibration, mechanical shock (putting it down hard)

■

Soot, vapour, dust and corrosive gases

■

Hazardous environments, flammable atmospheres

Store the instrument in its original packaging in a location that fulfils the conditions listed

above. If the original packaging is not available, pack and store the instrument as described

below:

1. Wrap the instrument in a plastic film.

2. Place the instrument, along with shock-absorbent material and the stem protector (if

accompanying), in the packaging.

3. If stored for a prolonged period of time (more than 30 days), place a bag containing a

desiccant inside the packaging.

4. Transport, packaging and storage

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5. Commissioning, operation

Personnel: Skilled personnel

Tools: Open-ended spanner (SW 21), slot-type screwdriver

WARNING!

Physical injuries and damage to property and the environment caused

by hazardous media

Upon contact with hazardous media, harmful media (e.g. corrosive, toxic,

carcinogenic), and also with refrigeration plants and compressors, there is a

danger of physical injuries and damage to property and the environment.

Aggressive media with extremely high temperatures and under high pressure

or vacuum may be present at the instrument.

▶

For these media, in addition to all standard regulations, the appropriate

existing codes or regulations must also be followed.

Examine the packaging material carefully so that no accessories that might

be packed within are lost and check whether the required accessories -

depending on the case mounting type - are present (see chapter 2.3 “Scope

of delivery”).

5.1 Thermowell

(not with models E45.10, A46.11, A48.10 and A51)

CAUTION!

Damage as a result of improper installation

If, when fitting, the instrument, the torque required for this is applied to the

case, then this can lead to the damage of the thermometer.

▶

When installing with a thermowell, this should be tightened via the spanner

flats provided for this and using a suitable open-ended spanner.

Before installing, check whether the material used (specified in the delivery note) is

chemically resistant/neutral against the medium being measured.

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5. Commissioning, operation

5.2 Installation and assembly

5.2.1 Models A43, A46, A50, A51

1. Before installing, check whether the material of the thermowell used (specified in the

delivery note) is chemically resistant/neutral against the medium being measured.

2. When using parallel threads, a suitable seal should be used when mounting. Tapered

threads should be sealed using suitable sealing material.

3. Insert the thermowell into the process adapter without forcing or damaging it and

tighten (open-ended spanner, SW 21). The thermowell must not be bent or altered in

order to mount it. In general, the tip of the thermowell should be placed in the middle

third of the pipe.

4.1 Design without clamping screw on the thermowell

Insert the thermometer into the thermowell, to the stop. For this, overcome the

resistance felt. The clamping is generated through a point-based widening of the

diameter at the stem, or through the star shape diameter under the case. With this, pay

attention that the force is applied as in-line as possible with the thermowell and that

the measuring instrument is not bent by it. For the use of special thermowells, as an

alternative, the clamping is possible via a clamp spring located on the stem.

4.2 Design with clamping screw on the thermowell

Insert the thermometer into the thermowell, to the stop. With this, pay attention that

the force is applied as in-line as possible with the thermowell and that the measuring

instrument is not bent by it. Using a suitable screwdriver, tighten the screw on the side

of the thermowell head hand-tight.

5.2.2 Model A46.11

1. Remove one piece of the pipe insulation. The area of the surface with isolation

removed should only be large enough as is required for the mounting of the instrument.

Unnecessarily exposed surfaces will falsify the measuring results through heat

dissipation errors into the environment.

2. The attachment plate attached to the rear of the thermometer should be attached by

bending it to match the curve of the pipe so that the temperature sensor's measuring

element lies on the pipe wall.

3. Clip the delivered mounting clip onto one side of the attachment plate. Lead the clip

around the rear of the pipe and hook onto the other side of the attachment plate.

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5. Commissioning, operation

5.2.3 Models A48 and A51

Fitting with mounting flange sliding on stem

1. Place the bores onto the wall of the air duct provided (see figures below) by means of

the mounting flange dimensions.

2. Loosen the mounting flange from the thermometer. Place the flange with the flat surface

onto the wall and affix using the appropriate screws and screwdriver.

3. Insert the thermometer into the flange. Set it to the desired immersion depth in the air

duct. Then, using a suitable screwdriver, tighten the mounting screws (found on the side

of the flange) hand-tight and thus fix the thermometer.

Flange model A48, D61 Flange model A48, D50 Flange model A51, D40

Recommendation for the bore for the stem:

Ø 9.2 + 0.1 Ø 9.2 + 0.1 Ø 8.2 + 0.1

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5. Commissioning, operation

Installation with surface mounting flange

1. Place the bores onto the wall of the air duct provided (see figure below) by means of the

surface mounting flange dimensions.

2. Insert the stem of the thermometer into the centre bore, until the surface mounting

flange lies flat on the air duct wall. Fix using the appropriate screws and screwdriver.

5.3 Heat dissipation error

Heat dissipation errors occur if the area where the temperature is to be measured is so

small, that the mass of the temperature probe acts noticeably as thermal capacity. Such a

phenomenon may also occur if the insertion depth is insufficient, if the mounting fittings are

connected to a good thermal conductor (steel plates or similar) and there is a considerable

difference in temperature between the temperature to be measured and the temperature of

the mounting element.

5.4 Indicator check

Indicator checks should only be carried out in comparison with a more accurate instrument

or with a calibrated instrument. The temperature during the check must remain constant.

Fluctuating temperatures can lead to reading errors caused by the different response times

of the probes.

With thermometers without thermowells, with a full and correct insertion length, a

minimum waiting time of 10 minutes should be maintained for temperature equalisation.

With thermometers with thermowells, with a full and correct insertion length, a minimum

waiting time of > 15 minutes should be maintained for temperature equalisation.

The indicator should be checked once or twice every year.

Rear fixing ring, model A51

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5. Commissioning, operation

5.5 Indication correction

(not with model A46.11 surface thermometer)

The screw at the end of the stem (see figure) serves for the indication correction. Turning

the screw causes an immediate change in the displayed value and should only be carried

out after consultation with the manufacturer. Carry out steps 1 ... 4 after completing

consultation.

1. Remove the instrument from the process.

2. Allow the instrument to cool to room temperature.

3. Hold the instrument steady by the case (NOT on the stem), with a screwdriver, turn

the “screw” on the end of the stem until the defined temperature difference has been

compensated (clockwise = increase, anti-clockwise = reducing the displayed value).

4. Carry out a indication correction (see chapter 5.4 “Indicator check”).

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6. Faults

Personnel: Skilled personnel

Tools: Open-ended spanner, slot-type screwdriver

CAUTION!

Physical injuries and damage to property and the environment

If faults cannot be eliminated by means of the listed measures, the instrument

must be taken out of operation immediately.

▶

Ensure that there is no longer any pressure present and protect against

being put into operation accidentally.

▶

Contact the manufacturer.

▶

If a return is needed, please follow the instructions given in chapter 8.2

“Return”.

WARNING!

Physical injuries and damage to property and the environment caused

by hazardous media

Upon contact with hazardous media, harmful media (e.g. corrosive, toxic,

carcinogenic), and also with refrigeration plants and compressors, there is a

danger of physical injuries and damage to property and the environment.

Aggressive media with extremely high temperatures and under high pressure

or vacuum may be present at the instrument.

▶

For these media, in addition to all standard regulations, the appropriate

existing codes or regulations must also be followed.

For contact details see chapter 1 “General information” or the back page of

the operating instructions.

Faults Causes Measures

False value is

displayed

There is a fault Replace the measuring instrument

There is a zero point offset Carry out a indication correction

(see chapter 5.5 “Indication correction”)

Heat dissipation error Check the instrument selection and

installation situation (see chapter 5.3 “Heat

dissipation error”)

Medium is

escaping

(leakage)

Material of the thermowell is

unsuitable

Use a suitable thermowell and replace

measuring instrument.

The sealing of the thermowell

is defective

Replace the sealing

Impermissibly high process

pressure

Shut the plant down, adjust the process

pressure, if needed, replace the thermowell

and measuring instrument (see chapter 8.1

“Dismounting”)

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7. Maintenance and cleaning

For contact details see chapter 1 “General information” or the back page of

the operating instructions.

7.1 Maintenance

These bimetal thermometers are maintenance-free.

The indicator should be checked once or twice every year (see chapter 5.4 “Indicator

check”).

Repairs must only be carried out by the manufacturer.

7.2 Cleaning

CAUTION!

Physical injuries and damage to property and the environment

Improper cleaning may lead to physical injuries and damage to property and

the environment. Residual media in the dismounted instrument can result in a

risk to persons, the environment and equipment.

▶

Carry out the cleaning process as described below.

1. Prior to cleaning, properly disconnect the instrument from the process.

2. Use the requisite protective equipment.

3. Clean the instrument with a moist cloth (soapy water).

CAUTION!

Damage to the instrument

Improper cleaning may lead to damage to the instrument!

▶

Do not use any aggressive cleaning agents.

▶

Do not use any pointed and hard objects for cleaning.

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8. Dismounting, return and disposal

8.1 Dismounting

WARNING!

Physical injuries and damage to property and the environment through

residual media

Upon contact with hazardous media, harmful media (e.g. corrosive, toxic,

carcinogenic), and also with refrigeration plants and compressors, there is a

danger of physical injuries and damage to property and the environment.

▶

Before storage of the dismounted instrument (following use) clean it, in

order to protect persons and the environment from exposure to residual

media.

▶

Observe the information in the material safety data sheet for the

corresponding medium.

WARNING!

Risk of burns

During dismounting there is a risk of dangerously hot media escaping.

▶

Let the instrument cool down sufficiently before dismounting it!

▶

The case can get hot during operation. Never touch a hot thermometer.

WARNING!

Physical injury

When dismounting, there is a danger from aggressive media and high

pressures.

▶

Observe the information in the material safety data sheet for the

corresponding medium.

▶

Only disconnect the instrument or thermowell once the system has been

depressurised!

8.2 Return

Strictly observe the following when shipping the instrument:

All instruments delivered to WIKA must be free from any kind of hazardous substances

(acids, bases, solutions, etc.) and must therefore be cleaned before being returned.

WARNING!

Physical injuries and damage to property and the environment through

residual media

Residual media in the dismounted instrument can result in a risk to persons,

the environment and equipment.

▶

With hazardous substances, attach the material safety data sheet for the

corresponding medium.

▶

Clean the instrument, see chapter 7.2 “Cleaning”.

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When returning the instrument, use the original packaging or a suitable transport

packaging.

To avoid damage:

1. Place the instrument, along with shock-absorbent material, in the packaging.

Place shock-absorbent material evenly on all sides of the transport packaging.

2. If possible, place a bag containing a desiccant inside the packaging.

3. Label the shipment as carriage of a highly sensitive measuring instrument.

Information on returns can be found under the heading “Service” on our local

website.

8.3 Disposal

Incorrect disposal can put the environment at risk.

Dispose of instrument components and packaging materials in an environmentally

compatible way and in accordance with the country-specific waste disposal regulations.

9. Specifications

Specifications Model A43

Nominal size 63, 80, 100

Scale range -30 ... +50 °C to 0 ... 120 °C

Working range Full scale value

Case

■

Model A43.10

■

Model A43.20

■

Model A43.30

Aluminium

Steel, galvanised

Plastic, black

Process connection Thermowell G ½ B, brass

Stem Aluminium

Thermowell Brass

Permissible operating pressure at

thermowell

Max. 6 bar

Indication accuracy Class 2 per EN 13190

Indication correction At bottom of stem

Scale angle aprox. 270°

8. Dismounting, return and disposal / 9. Specifications

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Specifications Model E45

Nominal size 63

Scale range 20 ... 100 °C

Working range Full scale value

Case Steel, galvanised

Process connection Smooth stem, Ø 15 mm

Indication correction At bottom of stem

Scale angle aprox. 100°

Specifications Model A46

Nominal size 50, 63, 80, 100

Scale range -30 ... +50 °C to 0 ... 160 °C

Working range Full scale value

Case

■

Models A46.10, A46.11

■

Model A46.20

■

Model A46.30

Aluminium

Steel, galvanised

Plastic, black

Connection designs

■

Models A46.10, A46.20, A46.30

■

Model A46.11

With thermowell

Clip-on design

Permissible operating pressure at

thermowell

Max. 6 bar

Indication correction

■

Models A46.10, A46.20, A46.30

■

Model A46.11

At bottom of stem

No

Scale angle aprox. 270°

9. Specifications

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9. Specifications

Specifications Model A48

Nominal size 63, 80, 100, 160

Scale range -30 ... +50 °C to 0 ... 120 °C

Working range Full scale value

Case Aluminium

Process connection Flange, Ø d

2

= 61 mm, steel galvanised, adjustable

on stem

Stem Copper alloy

Indication accuracy Class 2 per EN 13190

Indication correction At bottom of stem

Scale angle aprox. 270°

Specifications Model A50

Nominal size 63, 80, 100, 160

Scale range -30 ... +50 °C to 0 ... 200 °C

Working range Full scale value

Case

■

Model A50.10

■

Model A50.20

Aluminium

Steel, galvanised

Process connection Thermowell G ½ B, copper alloy

Thermowell Copper alloy, removable with retainer screw

Permissible operating pressure at

thermowell

Max. 6 bar

Indication accuracy Class 2 per EN 13190

Indication correction At bottom of stem

Scale angle aprox. 270°

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