Guntner CXGDF.1 Installation Instructions Manual
CO2-evaporators – CXGDF.1
Product line: CO2aircoolers
Series description: Slim ceiling evaporators
Series: CXGDF.1
www.guentner.de
CXGDF.1 | 2015-12
Contents
page 2 / 68
1 Important basic information...................................................... 5
1.1 Safety instructions........................................................................... 5
1.1.1 Observing operating instructions........................................................5
1.2 Importance of the EN 378 series of standards – refrigeration
systems and heat pumps – safety-related and environmental re-
quirements.........................................................................................5
1.3 Responsibilities................................................................................ 5
1.3.1 Manufacturer's responsibilities........................................................... 5
1.3.2 Responsibilities of the system’s installer............................................6
1.3.3 Owner or operator responsibilities..................................................... 6
1.4 Legal notes........................................................................................7
1.5 Operating instructions..................................................................... 7
1.5.1 Scope..................................................................................................7
1.5.2 Set-up and other applicable documents............................................ 7
1.6 Conventions...................................................................................... 8
1.6.1 Typographical conventions.................................................................8
1.6.2 List of abbreviations........................................................................... 8
1.7 Conventions for safety signs and notices.....................................9
1.7.1 General safety signs and their meaning in these operating instruc-
tions.................................................................................................... 9
1.7.2 Warning symbols and their meaning in these operating instruc-
tions.................................................................................................... 9
1.7.3 Prohibitory signs and their meaning in these operating instruc-
tions.................................................................................................. 10
1.7.4 Mandatory signs and their meaning in these operating instruc-
tions.................................................................................................. 10
CXGDF.1 | 2015-12
2 Safety..........................................................................................12
2.1 Labelling on the unit:.....................................................................12
2.1.1 Safety signs on the unit................................................................... 12
2.1.2 Other signs and notes on the unit....................................................15
2.2 Basic safety notices.......................................................................18
2.2.1 How to act in an emergency............................................................18
2.2.2 Personnel, care requirements.......................................................... 18
2.3 Proper intended use.......................................................................19
2.3.1 Proper intended use.........................................................................19
2.3.2 Operating conditions.........................................................................19
2.3.3 Improper use.................................................................................... 20
2.4 Mechanical residual hazards.........................................................21
2.4.1 Fins, sharp unit corners and edges................................................. 21
2.4.2 Flap down drip tray.......................................................................... 21
2.4.3 Fans.................................................................................................. 22
© Güntner GmbH & Co. KG
page 3 / 68
2.4.4 Thermostatic expansion valve(option)..............................................22
2.5 Electrical residual hazards............................................................ 23
2.6 Thermal residual hazards.............................................................. 23
2.6.1 Frostbite hazard................................................................................23
2.7 Residual hazards due to carbon dioxide (CO2)........................... 23
2.8 Residual hazards caused by vibrations.......................................25
2.9 Residual hazards caused by pressurised parts.......................... 26
2.10 Residual hazards caused by defective installation.....................26
2.11 Residual hazards with break during operation........................... 28
2.12 Residual hazards caused by escaping objects or liquids.......... 28
2.13 Combined residual hazards.......................................................... 29
2.13.1 Easy to open side covers/................................................................29
2.14 Residual hazards with disposal....................................................29
3 Technical data........................................................................... 31
3.1 Unit................................................................................................... 31
3.2 Fans..................................................................................................31
4 Set-up and function.................................................................. 33
5 Fan motor.................................................................................. 34
6 Transportation and storage.....................................................35
6.1 Safety............................................................................................... 35
6.2 Transportation and storage...........................................................35
6.3 Storage before installation............................................................ 36
7 Set-up and start-up...................................................................37
7.1 Safety............................................................................................... 37
7.1.1 Safety instructions for set-up and start-up....................................... 37
7.1.2 System-side safety requirements..................................................... 38
7.1.3 Customer-side safety precautions....................................................39
7.2 Requirements at the set-up point................................................. 40
7.3 Unpacking the unit.........................................................................41
7.4 Installation....................................................................................... 42
7.4.1 System-side requirements for stress-free installation...................... 42
7.4.2 Mounting the unit..............................................................................44
7.5 Notes on connecting the unit....................................................... 44
7.5.1 Connecting the thermostatic expansion valve..................................45
7.5.2 Connecting the drain line to the drip tray......................................... 45
7.5.3 Connect the unit to the system........................................................ 46
7.5.4 Unit electrical connection and protection......................................... 47
7.6 Perform acceptance test................................................................48
7.7 Test readiness for operation......................................................... 49
7.8 Putting the unit into operation for the first time......................... 49
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
page 4 / 68
8 Operation................................................................................... 51
8.1 Safety............................................................................................... 51
8.2 Putting the unit into operation......................................................51
8.3 Taking the unit out of operation...................................................51
8.4 Shutting the unit down.................................................................. 52
8.5 Putting the unit into operation after a shutdown........................ 53
8.6 Changing the unit over to another working fluid........................ 53
9 Troubleshooting........................................................................ 54
9.1 Safety............................................................................................... 54
9.2 Service............................................................................................. 54
9.3 Troubleshooting table....................................................................54
9.4 Dealing with faults......................................................................... 55
10 Maintenance...............................................................................56
10.1 Safety............................................................................................... 56
10.1.1 Before starting all maintenance........................................................56
10.1.2 With all maintenance work............................................................... 56
10.1.3 After all maintenance work...............................................................58
10.2 Inspection and maintenance plan................................................ 58
10.2.1 Fans.................................................................................................. 59
10.2.2 Unit heat exchanger......................................................................... 59
10.3 Maintenance work.......................................................................... 61
10.3.1 Remove leaks...................................................................................61
10.4 Clean unit........................................................................................ 61
10.4.1 General............................................................................................. 61
10.4.2 Clean heat exchanger...................................................................... 62
10.4.3 Cleaning fans....................................................................................63
10.5 Defrosting the unit......................................................................... 64
10.5.1 Notes on defrosting.......................................................................... 64
10.5.2 Defrost control.................................................................................. 65
10.5.3 Circulation air defrosting...................................................................66
10.5.4 Electric defrosting (optional)............................................................. 66
10.5.5 Further notes on defrosting.............................................................. 67
CXGDF.1 | 2015-12
11 Plans/diagrams..........................................................................68
11.1 Electrics documentation................................................................68
11.1.1 Fan motor connection diagram........................................................ 68
11.1.2 Connection diagram electrical defrost (selectable option; accessory
on customer request)....................................................................... 68
© Güntner GmbH & Co. KG
page 5 / 68
1 Important basic information
1.1 Safety instructions
1.1.1 Observing operating instructions
CAUTION
Always keep the operating instructions in the unit's immediate vicinity at all times.
Ensure that the operating instructions are accessible to all people that have anything at all to do with
the unit at all times.
Ensure that the operating instructions are read and understood by all people that have anything at all
to do with the unit.
1.2 Importance of the EN 378 series of standards – refrigeration systems and heat pumps – safety-related and environmental requirements
EN 378 deals with safety-related and environmental requirements for designing, constructing, producing, installing, operating, maintaining and disposing of refrigeration systems and cooling equipment.
EN 378 is oriented towards manufacturers, installers and operators of refrigeration systems and
cooling equipment (see section 1.2. Responsibilities).
The objective of EN 378 is to restrict the possible hazards of refrigeration systems, cooling equipment and their working fluids (refrigerants and coolants) for people, property and the environment
to a minimum.
Insufficient safety measures or non-compliance with safety-relevant regulations can result in:
•
Breaks or ruptures on components with the danger of escaping materials (hazards caused by
the influence of low temperatures, excess pressure, direct influence of the fluid phase, moving
machine parts).
•
Escaping working fluid after a break or leak because of defective design, improper operation, insufficient maintenance, repairs, filling and disposal (hazards caused by damage to health, frostbite, suffocation, panic).
1.3 Responsibilities
1.3.1 Manufacturer's responsibilities
The notes provided in these operating instructions on maintaining the unit's functional safety, preventing possible hazards when transporting, setting up and installing, start-up and operation, and
with maintenance activities (cleaning, servicing and repairing) refer exclusively to the unit.
The manufacturer's responsibilities are documented in the unit's version in acc. with EN 378-2 (design, manufacture and testing).
CXGDF.1 | 2015-12
The materials used in the construction and for soldering and welding are designed to withstand
the foreseeable mechanical, thermal and chemical stresses, and are resistant to the working fluids
used and to mixtures of such working fluids and the oils used to lubricate refrigeration compressors.
© Güntner GmbH & Co. KG
The working fluid-carrying parts of the unit (core tubes, distributor tube and header outlet) are configured so that they remain tight with the foreseeable mechanical, thermal and chemical stresses,
and withstand the maximum permissible operating pressure.
Material, wall thickness, tensile strength, corrosive resistance, shaping process and testing are suitable for the working fluid used and withstand the possible pressures and stresses that might occur.
All responsibility for the equipment into which the unit is integrated, are the exclusive responsibility
of the people involved in the individual workflows.
1.3.2 Responsibilities of the system’s installer
The responsibilities of the system installer are documented in the system’s version (design, manufacture and testing – in accordance with EN 378-2.
Component supplier-system installer interfaces :
•
In the event of any malfunction, inform Güntner GmbH & Co. KG :
Inform Güntner GmbH & Co. KG immediately if faults occur during the set-up, installation, startup and operation..
The responsibilities of the system installer in particular include:
•
Planning and preparing emergency measures:
To avoid consequential damage caused by operational disruptions, a warning system which immediately signals all faults must be provided on-site. Prepare emergency measures that prevent
consequential damage for people and property should faults occur.
•
Specify checking and maintenance intervals:
The system must be configured and equipped with all required equipment for maintenance and
sufficient servicing and testing in accordance with EN 378-4.
When the unit is integrated into the refrigeration system , the working fluid and version must not deviate from the order-related information specified in the order-related documents.
page 6 / 68
The installer of the system must refer to the requirement for sufficient instruction of the operating
and supervision staff when operating and maintaining the equipment .
It is recommended that the future customer staff – if possible – be present during the set-up and installation, for tightness tests and cleaning, while the system is being filled with working fluid and for
the adjustment of the equipment .
1.3.3 Owner or operator responsibilities
The owner or operator responsibilities are documented in the operation, maintenance, servicing
and recovery of the system in accordance with EN 378-4.
The owner or operator must ensure that the proper people are sufficiently trained and qualified for
operating, monitoring and servicing the system .
The operating personnel for the system must have sufficient knowledge and experience with regard
to the mode of operation, operation and daily monitoring of this system .
Before starting up the system, the owner or operator must ensure that the operating personnel are
sufficiently instructed about the system’s documentation (which is part of the operating instructions)
on the set-up, monitoring, mode of operation and servicing of the system and the safety measures
to be observed, and with regard to the properties and handling of the working fluid to be used.
The owner or operator must ensure that when operating, monitoring and maintaining the system
the working fluid and version must not deviate from the details specified in the order-related documents.
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
Planning and preparing emergency measures: To avoid consequential damage caused by operational disruptions, a warning system must be installed on the customer's premises. Prepare emergency measures that prevent consequential damage for people and property should faults occur.
Responsibility remains with the owner or operator of the system , if the system are used by anybody else, unless there is a contrary agreement on sharing responsibility.
1.4 Legal notes
Warranty claim expires as follows:
•
With faults and damages that can be attributed to non-compliance with the specifications of
these operating instructions.
•
With complaints that can be attributed to use of spare parts other than the original spare parts
specified in the order-related offer documents.
•
With changes to the unit (working fluid, version, function, operating parameters) vis-a-vis the or-
der-related information specified in the order-related offer documents without the manufacturer's
prior consent.
The operating instructions may not be reproduced electronically or mechanically, circulated,
changed passed on to third parties, translated or used otherwise, in full or in part, without Güntner
GmbH & Co. KG’s prior explicit written approval.
page 7 / 68
1.5 Operating instructions
1.5.1 Scope
1.5.2 Set-up and other applicable documents
These operating instructions apply to all CO2evaporators of the CXGDF.1 series.
You will find the precise type of your unit in the attached order-related documents.
The unit's operating instructions include the following parts:
•
These instructions
•
Order-related documents
The order-related documents are included with these instructions and contain the following in-
formation:
– The order-related proper use as specified
– The order-related scope of delivery
– The order-related technical data
– The order-related drawings specifying customer, project number and order number
•
Motor connection wiring diagram in terminal boxes
These operating instructions are part of the operating instructions manual of the system, provided
by the system’s installer .
NOTICE
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
1.6 Conventions
1.6.1 Typographical conventions
1.6.2 List of abbreviations
The following text markups are used in these operating instructions:
Bold Requires special attention!
Grey triangle Instructions
Abbreviations Meaning
page 8 / 68
CO
2
EN 378 European Norm 378: Refrigeration systems and heat pumps; safety-related
EN European Norm
DIN German industrial standard (specification of a standard)
ISO International Standardization Organization .
°C Degrees Celsius (Celsius scale temperature)
is Unit of pressure
I Litre (liquid volume)
Vol% Volume percent (concentration level relative to a volume)
IP Insulation protection
Q 6,3 Balancing quality
ppm parts per million, concentration figure, stands for “millionth part”.
Hz Hertz (frequency)
D Delta connection (alternating current: high speed)
S Star connection (alternating current: low speed)
3~ 3-phase current
CO2 refrigerant (R744)
and environmental requirements
CXGDF.1 | 2015-12
1~ 1-phase alternating current
VDE “Verband der Elektrotechnik, Elektronik und Informationstechnik” (Association
for Electrical, Electronic & Information Technologies)
TCC Technical Connection Conditions
EPC Electric Power Company
VDI “Verein Deutscher Ingenieure” (German engineers’ association)
© Güntner GmbH & Co. KG
1.7 Conventions for safety signs and notices
1.7.1 General safety signs and their meaning in these operating instructions
DANGER
Dangerous situation that will definitely cause serious injury or death if it is not avoided.
WARNING
Dangerous situation that could cause serious injury or death if it is not avoided.
CAUTION
Dangerous situation that could cause slight to moderate injury if it is not avoided.
NOTICE
Refers you to possible damage to property.
page 9 / 68
1.7.2 Warning symbols and their meaning in these operating instructions
Warns against hand injuries!
Failure to comply with warnings may result in hands or fingers being crushed,
dragged in or otherwise injured.
Warns against hot surfaces!
The temperature is over +45°C (at which protein clots) and can cause burns.
Warns against cold!
The temperature is below 0°C and can cause frostbite.
Warns against dangerous electrical voltage!
Danger of an electric shock if voltage-carrying parts are touched.
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
Warns against harmful to health or irritant substances at set-up point
Contact with or inhaling substances that are irritant or harmful to health can cause
injuries or damage peoples’ health.
Warning of automatic start-up
If the unit starts up automatically during maintenance work there is a danger of
pinching/trapping the hands and fingers.
1.7.3 Prohibitory signs and their meaning in these operating instructions
Fire, open fire and smoking prohibited!
Ignition sources must be kept away and ignition sources must not develop!
page 10 / 68
No smoking!
Smoking is forbidden.
1.7.4 Mandatory signs and their meaning in these operating instructions.
Use eye protection!
Eye protection: Use protective cover, protective glasses or face protection.
Use hand protection!
Protective gloves must protect against mechanical and chemical dangers (see imprinted pictograms).
Use respiratory protection!
Breathing apparatus must be suitable for the working fluid used. Breathing apparatus must consist of:
•
At least two independent breathing devices (self-contained breathing apparatus)
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
page 11 / 68
Use protective clothing!
Personal protective clothing must be suitable for the working fluid used and for low
temperatures, and must have good heat insulation properties.
Activate before work!
Activate the electrical system and secure against switching on again before starting installation, maintenance and repair work.
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
2 Safety
GDF.1 Typ A, B
GDF.1 Typ C
1
1
14
22
2
14
22
2
23
6
7
13
23
6
7
13
24
24
17
TÜV
GÜNTNER
GÜNTNER
ACHTUNG! CAUTION! ATTENTION!
ACHTUNG! CAUTION! ATTENTION!
ACHTUNG! CAUTION! ATTENTION!
ACHTUNG! CAUTION! ATTENTION!
Servickedeckel . Inspeczion door . Panneaude service
TÜV
Servickedeckel . Inspeczion door . Panneaude service
Auf
Open
Zu
Close
Auf
Open
Zu
Close
Prüfmedium
Aufgebrachter Prüfdruck PT
zulässige max./min. Temperatur TS
max./min. zulässiger Druck PS
Gerätebezeichnung
Herstellungsjahr
Herstellernummer
Projektnummer
WÄRMEAUSTAUSCHER
D-82256 FÜRSTENFELDBRUCK
INDUSTRIESTRASSE 14
HANS GÜNTNER GMBH
Ventilator-Typ/Nummer
Volumen V
Prüfdatum
c) Geräte vereinzeln
Unload units separately
Séparer, les appareils
b) Zum Vereinzeln
Transportschutz entfernen
Single unit
Remove transport protection
Appareil individuel
Enlever protection de transport
2. Montage
Mounting
Assemblage
a) Gesamt/ All units
Tous les appareil
1. Entladen
Unloading
Décharger
A
A
SW
13
SW1
3
SW
13
Prüfmedium
Aufgebrachter Prüfdruck PT
zulässige max./min. Temperatur TS
max./min. zulässiger Druck PS
Gerätebezeichnung
Herstellungsjahr
Herstellernummer
Projektnummer
WÄRMEAUSTAUSCHER
D-82256 FÜRSTENFELDBRUCK
INDUSTRIESTRASSE 14
HANS GÜNTNER GMBH
Ventilator-Typ/Nummer
Volumen V
Prüfdatum
2.1 Labelling on the unit:
Placing identifiers on the unit
page 12 / 68
Placing identifiers on the unit
2.1.1 Safety signs on the unit
Safety signs on the unit individually:
940 - “Transportation filling” warning sign next to Schrader valve
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
4413 - “Do not use wrench” warning sign beside tray drain
page 13 / 68
938 - Warning on inspection door (only with hinged fans)
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
page 14 / 68
3083 - “Protection grill” warning sign (only used with separate removable protection grill)
61100 - Tray safety catch warning sign
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
2.1.2 Other signs and notes on the unit
page 15 / 68
2483 - Example of a manufacturer’s nameplate
2119 – Logo
943 and 943.1 - Connections IN and OUT
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
page 16 / 68
13 - Expansion valve mounting
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
947 - Corrosion resistance
page 17 / 68
CXGDF.1 | 2015-12
Installation
© Güntner GmbH & Co. KG
2.2 Basic safety notices
2.2.1 How to act in an emergency
Danger of injuries and damage to property!
CO2 is an irritant gas and when inhaled causes agitation, dizziness, vomiting and
cramps; with heavy concentrations suffocation and life-threatening pulmonary oedema.
Irritation of the respiratory centre with 30,000 to 50,000 ppm (3 to 5 vol %).
Unconsciousness with 70,000 to 100,000 ppm (7 to 10 vol%).
Safety measures and procedure:
•
In the event of serious unexpected leakage of refrigerant, leave the set-up room immediately and activate the emergency measures provided, e.g. if:
– Visibly escaping refrigerant liquid or vapour from the heat exchanger or tube
components.
– Sudden large release (release and evaporation of the greater part of the entire
refrigerant filling in a short time, e.g. in less than 5 minutes).
– Sudden irritation of the respiratory centre
– Activation of the NH2 alarm device (NH3 concentration > 5,000 ppm - MAC val-
ue):
•
Have experienced, trained personnel with appropriate protective clothing perform all
necessary protective and other measures:
– Use respiratory protection.
– Use a room air-independent breathing apparatus for maintenance work in high
CO2concentrations in the room air.
– Ensure the set-up room is well ventilated.
– Divert escaped refrigerant vapour and escaped refrigerant liquid safely.
page 18 / 68
WARNING
2.2.2 Personnel, care requirements
The unit may be installed, put into operation, operated, maintained and repaired only by trained, experienced and qualified personnel. In order to be considered qualified, people who are to be responsible
for the operation, maintenance, repair and evaluation of systems and their components must have the
necessary training and specialist knowledge for such work, as stipulated in EN 378-1. Qualified or expert means the ability to satisfactorily perform the activities required for the operation, maintenance, repair and evaluation of refrigeration systems and their components.
The unit may be operated by operating personnel that have no specific knowledge of refrigeration engineering, but have sufficient knowledge and experience with regard to the mode of operation, operation
and daily monitoring of this system, . This operating personnel may not make any interventions or settings on the system.
Changes to the unit, which the manufacturer has first agreed to in writing, may only be made by the instructed and qualified personnel.
CAUTION
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
Electrical installation:
Work on the electrical equipment may only be performed by personnel that have the required expertise
(e.g. an electrician or an electro-technically instructed person), and who are authorised by the operator,
in compliance with the respective VDE regulations (and national and international provisions) and the
TCCs of the EPCs.
2.3 Proper intended use
2.3.1 Proper intended use
CO2 evaporators of the CXGDF.1 series are intended for installation in a refrigeration system and
are used for cooling and circulating the room air e.g. in cold storage rooms and cold storage cells,
etc. The slimline design of these evaporators, and the CXGDF.1 in particular, enables optimum
room use. The CXGDF.1 series is ideal for deep-freeze applications (with a recommended fin spacing of 7 mm).
The unit is delivered for operation with a specific operating point:
•
Evaporation temperature
•
Airflow volume
•
Air inlet temperature
•
Relative air humidity.
The specified operating point is given in the order-related documents.
page 19 / 68
2.3.2 Operating conditions
The unit is a component a cooling system including its working fluid circuit. The purpose of these
operating instructions, as part of the operating instructions manual (of which these operating instructions are a part), is to minimise the danger to people and property and the environment from
the unit and the working fluid used in it. These dangers are essentially connected with the physical and chemical properties of the working fluid and with the pressures and temperatures that occur in the working fluid-carrying components of the unit see Residual hazards due to carbon dioxide
(CO2), page 23.
Danger of injuries and damage to property!
The unit may be used only in accordance with the proper intended use. The operator must ensure that
when operating, monitoring and maintaining the unit, the fluid used and the mode of operation do not
deviate from the order-related information specified in the order-specific documents.
The operator must ensure that maintenance measures are performed in compliance with the system’s
operating instructions manual.
Filling the unit with a different fluid is permitted only following written approval by the manufacturer. You
will find the order-related proper use as intended in the order-specific documents.
Do not exceed the max. operating pressure given on the unit’s type plate.
WARNING
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
2.3.3 Improper use
Danger of injuries and damage to property!
Working fluids and their combinations with water or other substances in the working fluid-carrying components have chemical and physical effects from the inside on the materials surrounding them. The unit
may be pressurised only with CO2. Pressurising the unit with another working fluid would have the effect
that
■
the structural, soldering and welding materials used do not withstand the foreseeable mechanical,
thermal and chemical stresses, and the pressure that can occur during operation and when shut
down is not withstood.
■
material, wall thickness, tensile strength, corrosive resistance, shaping process and testing are not
suitable for the working fluid used and do not withstand the possible pressures and stresses that
might occur.
■
the unit would not be resistant to the other working fluid and the combination of the other working fluid and
■
the unit not remaining tight during operation and when shut down.
■
a possible sudden escape of working fluids could directly endanger people and/or property and the
environment.
page 20 / 68
WARNING
The maximum permissible operating temperature specified on the type plate must not be exceeded! If
the operating temperature is exceeded,
•
the unit would be exposed to an impermissibly high pressure (pressure/temperature correlation),
•
signs of material fatigue would emerge,
The maximum permissible operating pressure specified on the type plate must not be exceeded! If the
operating pressure is exceeded,
■
the parts of the unit carrying the working fluid might not withstand the foreseeable mechanical, thermal and chemical stresses and the pressures that may occur during operation and when shut down,
■
the unit would not remain tight during operation and when shut down,
■
there may be a possible sudden escaping of working fluids after a break or leakage on working fluid-carrying components, which would result in the following dangers:
– Danger of escaping materials
– Fire hazard (caused by refrigerator oil parts)
– danger of frostbite (caused by liquid coolant squirting/splashing),
– Suffocation hazard
– hazards caused by panic reactions, agitation, dizziness, vomiting and cramps,
– Environmental pollution
WARNING
CO2evaporators may not be used
■
where it is possible that short or prolonged effect caused by contact, inhalation or ingestion of the
working fluid CO2 might result in harmful hazards.
■
where the possibility exists of a sudden large release (release and evaporation) of the greater part of
the entire working fluid filling in a short time (e.g. in less than 5 minutes).
CXGDF.1 | 2015-12
© Güntner GmbH & Co. KG
page 21 / 68
■
where the possibility exists that the longest time that people are exposed to a large release of the
CO2 refrigerant is more than 60 minutes when the refrigerant concentration exceeds 5,000 ppm
(MAC value) and the number of clearly identified emergency exits for the number of usually present
people are not available.
■
where the number of clearly identified emergency exits for the number of usually present people are
not available.
The unit must not be changed without the prior written consent of Güntner GmbH & Co. KG . Changes
to the unit are:
■
Changing the operating point (as specified in section see Unit, page 31)
■
Changing the fan capacity (air volume)
■
Changing the working fluid flow-through volume
■
Changing over to another working fluid
The unit must not be operated if safety devices recommended by the manufacturer are not available, not
properly installed or not fully functional.
The unit must not be operated if it is damaged or demonstrates faults. All damage and faults must be
reported to Güntner GmbH & Co. KG immediately and dealt with promptly.
Work on the unit must not be performed without the personal protective equipment specified in these operating instructions.
2.4 Mechanical residual hazards
2.4.1 Fins, sharp unit corners and edges
Warns against hand injuries!
Danger of cuts on hands and fingers on the fins and on sharp corners and edges of
the unit.
Use reliable hand protection!
2.4.2 Flap down drip tray
WARNING
WARNING
CXGDF.1 | 2015-12
Warning against personal injury and damage to property!
Danger of falling unit parts, masses of water or ice when the drip tray is flapped out.
Nobody is allowed to be in the danger area below the unit during cleaning or maintenance work.
The drip tray can be flapped down for cleaning and is protected from falling down by a safety catch.
Unit parts, masses of water or ice can nonetheless fall down when it is flapped down.
© Güntner GmbH & Co. KG
Loading...