WIKA A2G-65, air2guide A2G-65 User manual

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Operating instructions
Betriebsanleitung
Mode d'emploi
Manual de instrucciones
Manuale d'uso
GB
Frost protection thermostat model A2G-65
Frostschutzthermostat Typ A2G-65
Thermostat antigel type A2G-65
Termostato antihielo modelo A2G-65
Termostato antigelo modello A2G-65
Frost protection thermostat model A2G-65
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WIKA operating instructions air2guide model A2G-65
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Operating instructions model A2G-65 Page 3-11
Betriebsanleitung Typ A2G-65 Seite 13-21
Mode d'emploi type A2G-65 Page 23-31
Manual de instrucciones modelo A2G-65 Página 33-41
Manuale d'uso modello A2G-65 Pagina 43-51
© 2011 WIKA Alexander Wiegand SE & Co. KG
All rights reserved. / Alle Rechte vorbehalten.
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!
Prima di iniziare ad utilizzare lo strumento, leggere il manuale d‘uso!
Conservare per future consultazioni!
WIKA operating instructions air2guide model A2G-65
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40338355.02 05/2012 GB/D/F/E/I
1. General information 4
2. Safety 5
3. Specications 6
4.
Design and function
8
5. Transport, packaging and storage 9
6. Commissioning, operation 9
7. Options and accessories 11
8. Maintenance and cleaning 11
9. Disposal 11
Contents
Contents
WIKA operating instructions air2guide model A2G-65
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1. General information
1. General information
The frost protection thermostat described in the operating instruc-
tions has been designed and manufactured using state-of-the-art
technology. All components are subject to stringent quality and
environmental criteria during production. Our management systems
are certied 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.
Skilled personnel must have carefully read and understood the
operating instructions, prior to beginning any work.
The manufacturer’s liability is void in the case of any damage caused
by using the product contrary to its intended use, non-compliance
with these operating instructions, assignment of insuciently
qualied skilled personnel or unauthorised modications to the
instrument.
The general terms and conditions contained in the sales
documentation shall apply.
Subject to technical modications.
Further information:
- Internet address: www.wika.de / www.wika.com
www.air2guide.com
- Relevant data sheet: TE 62.92
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1. General information / 2. Safety
Explanation of symbols
WARNING!
... indicates a potentially dangerous situation which can
result in serious injury or death if not avoided.
Information
… points out useful tips, recommendations and information
for ecient and trouble-free operation.
2. Safety
WARNING!
Before installation, commissioning and operation, ensure
that the appropriate frost protection thermostat has been
selected in terms of measuring range, design and specic
measuring conditions.
Non-observance can result in serious injury and/or damage
to the equipment.
Further important safety instructions can be found in the
individual chapters of these operating instructions.
2.1 Intended use
This frost protection thermostat is used for air-side temperature control
and prevention of frost damage to water heating coils in ventilation and
air-conditioning systems
The instrument has been designed and built solely for the intended use
described here and may only be used accordingly.
The manufacturer shall not be liable for claims of any type based on
operation contrary to the intended use.
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2. Safety / 3. Specications
2.2 Personnel qualication
WARNING!
Risk of injury if qualication is insucient!
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 qualications described below.
Skilled personnel
Skilled personnel 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-specic regulations,
current standards and directives, are capable of carrying out the work
described and independently recognising potential hazards.
Explanation of symbols
CE, Communauté Européenne
Instruments bearing this mark comply with the relevant
European directives.
3. Specications
Capillary tube
Copper alloy
Length 3 m, optional 1.8 or 6 m
Capillary tube lling
R 507
Resetting
automatic, manual optional
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3. Specications
Electrical connection
Screw terminal max. 2.5 mm
2
Cable gland M16 x 1.5
Permissible temperature
Ambient: -30 … +70 °C, max. 85 % rH, non-condensing
Medium: w + minimum 2 K … 70 °C
(w = selected set point)
Housing material
Lower body: PA GK30
Cover: ABS transparent
Dimensions in mm
Ingress protection
IP 65 per EN 60529 / lEC 529
For further specications see WIKA data sheet TE 62.92 and the order
documentation.
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4. Design and function
4. Design and function
Description
Design
CE conformity: 2004/108/EG Electromagnetic compatibility (EMC)
Product safety: 2001/95/EC Product safety
EMC: EN 60730-1: 2002
Product safety: EN 60730-1: 2002
Adjustable range for set point
-10 … +15 °C (Factory setting: 5 °C)
Switching dierential
≤ 2 ±1 °C
Repeatability
±0.5 °C
Sensor active length
approx. 60 cm
Switching output
Changeover contact, max. AC 250 V, max. 10 A
Contact material: Ag / Ni (90 % / 10 %), gold-plated (3 µm)
Scope of delivery
Cross-check the scope of delivery with the delivery note.
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5. Transport, packaging and storage
5.1 Transport
Check the frost protection thermostat for any damage that may have
been caused during transportation. Obvious damage must be reported
immediately.
5.2 Packaging
Do not remove packaging until just before mounting.
Keep the packaging as it will provide optimum protection during trans-
port (e.g. change in installation site, sending for repair).
5.3 Storage
Permissible conditions at the place of storage:
Storage temperature: -30 ... +70 °C
Protect frost protection thermostat from moisture and dust.
6. Commissioning, operation
Installation and mechanical connection
The ambient temperature at the frost protection thermostat housing
(with the test loop) must be at least 2 °C above the selected set point.
If this cannot be guaranteed (e.g. outdoors or in exposed areas), the
housing and test loop must be installed inside the air handling unit.
The capillary tube must be mounted on the downstream side of the
heating coil (and on the upstream side in the case of cooling coils).
It should be looped diagonally across the heat exchanger pipes at a
distance of approx. 5 cm and should cover the entire area evenly. For
test purposes, it is recommended to have a loop of approx. 60 cm
directly beneath the housing outside the entry to the duct. To prevent
damage to the capillary tube, a minimum bending radius of 20 mm
must be ensured. Mounting can be made easier by using capillary tube
clamps (optional accessories).
5. Transport, packaging ... / 6. Commissioning, operation
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6. Commissioning, operation
1 - 2 Normal operation
1 - 4 Risk of frost
Connection diagram
The switch in the frost protection thermostat trips when the tempera-
ture over a capillary length of at least 60 cm drops below the selected
set point (contact 1-4 makes). Simultaneously, contact 1-2 breaks
and can be used as a signal contact. An automatic reset (contact 1-2
makes) occurs when the temperature once again exceeds the selected
set point. The air2guide AFT is “intrinsically safe”, i.e. in the event of
any damage to the capillary tube diaphragm system, it automatically
switches to the heating function. Contact 1-4 makes and can thus be
used as an operating contact. The air temperature is measured over the
full length of the sensor (capillary tube).
Commissioning
It is recommended to mount the frost protection thermostat on a special
plate (slide-in module), directly downstream of the heating coil. The
connecting cable must therefore be long enough to enable the plate to
be inserted and removed smoothly. For heating coils with a very large
cross section, several frost protection thermostats can be tted and
connected in series. In such cases, the temperature set point is set
individually for each frost protection thermostat.
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7. Options and accessories ... 9. Disposal
7. Options and accessories
Standard accessories
Mounting clamps, 6 pieces for 6 m long capillary tube
2 x grommets DA 20/80/10
Options
Manual resetting
Capillary tube length 1.8 or 6 m
8. Maintenance and cleaning
The frost protection thermostat is maintenance-free and oers long
service life provided it is handled and operated properly.
Clean the instruments with a moist cloth (soap water).
Repairs must only be carried out by the manufacturer or appropriately
qualied skilled personnel.
9. 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-
specic waste disposal regulations.
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WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg • Germany
Tel (+49) 93 72/132-0
Fax (+49) 93 72/132-406
www.wika.de
WIKA subsidiaries worldwide can be found online at www.wika.com.
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La liste des liales WIKA dans le monde se trouve sur www.wika.fr.
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