Translation of Original Operating Instructions · | 2010-09 Drycooler – GFW Translation of Original Operating Instructions Transportation | Assembly | Operation | Maintenance

www.guentner.de

| 2010-09

Drycooler – GFW

Translation of Original Operating Instructions

Transportation | Assembly | Operation | Maintenance

Product line:

Series variant description: W drycooler

Series: GFW

http://www.guentner.de

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| 2010-09 © Güntner AG & Co. KG

Contents

1 General safety instructions......................................................... 31.1 General instructions...........................................................................31.2 Safety instructions............................................................................. 4

2 Technical data...............................................................................92.1 General information on the unit....................................................... 92.2 Technical data.....................................................................................92.3 Sound specifications......................................................................... 9

3 Operation..................................................................................... 103.1 Application........................................................................................ 103.2 Definitions......................................................................................... 103.3 Fan motor.......................................................................................... 10

4 Transportation and storage.......................................................124.1 Packaging.......................................................................................... 124.2 Transportation and unloading.........................................................124.3 Storage...............................................................................................154.4 Safety................................................................................................. 15

5 Assembly and installation......................................................... 165.1 Installation information....................................................................165.2 Installation guidelines......................................................................175.3 Assembly........................................................................................... 23

6 Start-up and operation...............................................................266.1 Start-up.............................................................................................. 266.2 Operation........................................................................................... 266.2.1 Normal operation................................................................................ 266.2.2 Taking out of service and final shutdown........................................... 276.2.3 Modifications to the unit and non-permissible operating conditions and

working methods................................................................................ 27

7 Maintenance................................................................................ 287.1 General information......................................................................... 287.2 Cleaning.............................................................................................287.3 Maintenance and repair................................................................... 297.4 Water spray system instructions....................................................30

8 Güntner - Head office.................................................................31

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1 General safety instructions

1.1 General instructionsPurpose

possible dangers associated with the device during

• transport• setup and assembly• commissioning and operation• maintenance (cleaning, maintenance and servicing)and to reduce such dangers to a minimum for persons, materials and the environment.

Binding regulations

• EU Directive 97 / 23 / EG on pressure equipment (pressure equipment directive)• EU Directive 98 / 37 / EG on machines (machine directive)• EN 378; Parts 1 to 4; "Refrigeration systems and heat pumps, technical safety and environmen-

tal requirements" (a standard that supports the basic demands of the aforementioned EU Direc-tives in accordance with CEN)

• Law on Equipment and Product Safety (GPSG); including ordinances (GPSGV) valid for theFederal Republic of Germany

• BGR 500 "Operation of Work Equipment"; Chapter: "Operation of refrigeration systems, heatpumps and cooling equipment"; valid for the Federal Republic of Germany

• "Operating Instruction Manual in accordance with EN 378-2; Güntner drycoolers" (seewww.guentner.de)

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• Adhesive labels on the machine with regulations and indications by the manufacturer:Apart from applying these Operating Instructions, the operator is also obliged to observe the in-formation and requirements outlined in the "Operating Instruction Manual in accordance with EN378-2; Güntner" in order to maintain his warranty claims.

These Operating Instructions apply for serial equipment. These Operating Instructions are only con-ditionally valid for custom-made equipment. In this case, the manufacturer must be consulted.

WARNINGShould defects be detected in the unit, the manufacturer must be informed immediately so that hecan contribute to eliminating such defects.

CAUTIONTo avoid ensuing damage caused by disruptions of operations, the customer must possess awarning system which immediately indicates any kind of malfunction. Emergency measures mustbe planned and prepared which in case of malfunctions help to avoid ensuing damage.

1.2 Safety instructionsDevice

WARNING

Danger of burns when touching piping and distributor pipes at heat transfermedium temperatures above + 45 °C!

WARNING

WARNINGSharp edges and corners on the units (especially on the fins) can cut fingers and hands; wearprotective gloves.

WARNINGOnly access the equipment wearing sturdy, non-slip shoes.

CAUTIONEquipment without railings: Only access with lanyard rails.

CAUTIONWork on pressurised parts (pipelines, heat exchanger components): depressurise this section ofthe system and/or siphon off the heat transfer medium from this section.

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CAUTIONMaintenance work: equipment components must always be replaced with original spare parts.

CAUTION

The maximum operating pressure specified on the nameplate may not be ex-ceeded.

Electrical system

CAUTIONElectrical installation of the units: only be electricians in compliance with the relevant VDE rules(or the national and international regulations) and the technical work regulations of the public util-ities.

NOTICE

All work on fans or motors: it is imperative that the power supply is disconnect-ed. During installation and maintenance work, the power supply to the unit mustbe disconnected. The system must be secured against unintentional reactiva-tion.

WARNINGThe fan motors of the units must be provided with a deactivation facility in compliance with theDIN EN 60204-1 standard to prevent unexpected starting (e.g. repair switch or via fuses in the ad-jacent switch cabinet). These deactivation devices must be secured to prevent them from beingunexpectedly or unintentionally reactivated when the power is dead (e.g. can be locked by a pad-lock).

Fans

CAUTIONRemoval of the fan protection guards and working on the fans: only permissible with the powersupply switched off (power dead) and if appropriate protection is provided against unintentionalreactivation (remove fuses, put up warning signs).

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NOTICEWorking on the fan air inlet and outlet guides: ensure that the power has been disconnected.When work is concluded, do not leave any components near the fan as they will cause faults ordamage to the fans and/or heat exchangers upon reactivation.

Operating agents

NOTICEThe unit is operated with the heat transfer medium ethylene glycol (synonyms: ethanediol, gly-col) as standard. Co-ordination with the manufacturer is imperative when using with other heattransfer media. Ethylene glycol is a colourless, slightly viscous, low-explosive hygroscopic liquidwhich can be mixed with water and has a sweet smell or taste.

CAUTION

Ethylene glycol is flammable and potentially explosive at higher temperatures invapour/gaseous state.

WARNINGUpon contact with the skin, ethylene glycol generates minor irritation with the danger of skin re-sorption, irritation of the mucous membranes following contact with eyes, agitation and problemswith the central nervous system when swallowed as well as fatigue, unco-ordinated movements,unconsciousness and kidney damage if exposure is more lengthy.

CAUTION

Keep ethylene glycol away from ignition sources. – No smoking!

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CAUTIONEthylene glycol vapours are heavier than air and can flow into lower-lying areas. An increasedconcentration can arise in static air at ground level. High concentrations represent a danger ofsuffocation owing to reduced oxygen levels, especially near the ground.

WARNINGAvoid contact with the skin, eyes and clothing. Remove contaminated, saturated clothing immedi-ately.

WARNING

Wear suitable protective clothing (protectivegloves, eye protection, protective equipment).

CAUTION

Prevent contact with strong oxidising agents (chromosulfuric acid, potassiumpermanganate, fuming sulfuric acid or similar). Intense danger of reaction!

WARNINGNo access to the unit by unauthorised persons. When setting up the unit, it must be ensured thatthe heat transfer medium emanating from the unit is unable to penetrate the building or otherwiseendanger people.

CAUTION

Suitable fire-fighting equipment must be provided on site when working withflames, e.g. grinding, welding, soldering etc. The fire extinguishers to be pro-vided must be available and ready for use in sufficient numbers, and their extin-guishing agents must not react dangerously with the heat transfer medium.

WARNINGAs the core tubes are arranged horizontally, there is no guarantee that the tubes are fully dis-charged. A drycooler operated with water or non-frostproof mixture of glycol and water and/oran incorrect heat transfer medium setting must be either fully drained or rinsed with glycol until asufficient level of frost protection is ensured. When draining, the pressure drop can be increasedwith compressed air as required.

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2 Technical data

2.1 General information on the unit

Manufacturer: Güntner AG & Co. KGHans-Güntner-Strasse 2-6D-82256 Fürstenfeldbruck

Unit name: See order-specific offer documents

Volume V: See order-specific offer documents

Fan type/number See order-specific offer documents

Fluid: See order-specific offer documents

Max. perm. pressure PS: 16 bar

Perm. max./min. temperature TS:- 50...+ 100 C

Test pressure applied PT: 17.6 bar

Test medium: Dried air

2.2 Technical data

See order-specific offer documents and unit nameplate

2.3 Sound specifications

The indicated sound pressure level is based on the calculation (according to EN 13487) of thesound pressure level on the surface of a cuboid area which is at 10 metres distance and parallel tothe referential envelope of the sound source (standard procedure for calculating the sound pressurelevel, EN 13487, Annex C, distance mas per Eurovent).

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3 Operation

3.1 Application

Refrigeration, air-conditioning and process engineering for heat dissipation into the air when set upoutdoors. The heat transfer medium from the drycooler cools the following: Condensing refriger-ants, circuits in CHP plants, technological lines (e.g. presses) etc.

3.2 Definitions

This is an incomplete assembly.

A fan-ventilated drycooler is an independent device for cooling single-phase liquid (heat transfermedium) by dissipating tangible heat via a heat exchanger which is then circulated by one or moreintegrated fans. The heat exchanger is the component of the fan-ventilated drycooler in which theheat transfer medium dissipates heat into the air which is then conveyed through the cooling sys-tem by the fan(s).

The heat exchanger is the working fluid circulated in the system which stays in its liquid phase whileabsorbing and dissipating heat during operation. The fluid used is a heat transfer medium as perEN 378-1, section 3.7.2. Staff are not exposed to any immediate danger.

3.3 Fan motor

NOTICEDuring longer storage or downtime periods, the fans must be operated for 2 to 4 hours eachmonth.

NOTICEIn the case of fans with protection type IP55 or higher, any sealed condensate drain holes must beopened at least every six months.

Motors with PTC resistors require an additional trigger device for the installed thermistors. Lockingis recommended to prevent reactivation. Max. 2.5 V test voltage or current-limited meters on ther-mistors.

When using step switching, the corresponding time delays must be taken into consideration for mo-tors with 2 speeds.

For motors with direct start and a connection value > 4.0 kW, a startup current limitation (softstartusing thyristor) may be necessary.

AC technology

NOTICEWhen using other brands for frequency converter mode on external rotor motors (Ziehl-Abegg),please observe the following: effective all-pole sinus filters should be fitted between the converterand the motor (sinus-shaped output voltage, phase against phase, phase against protection con-ductor). Güntner frequency converter speed regulators feature this function as standard. Güntnerthree-phase standard motors are suitable for operation on frequency converters.

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The fan motors can be operated by means of star-delta connection with two speeds and/or withspeed control. The direction of rotation must be checked. If the direction is wrong, it can bechanged by interchanging two phases.

Electronic technology

NOTICEThe fan motors avail of a separate electronic power circuit. This power circuit is controlled viaGüntner Motor Management GMM. The motors can be powered at single-phase (1~, 200 - 277 VAC, 50/60 Hz) and three-phase (3~, 380 - 480 V AC, 50/60 Hz) voltages. Please refer to the wiring di-agrams or motor terminal box information for the electrical connection.

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4 Transportation and storage

4.1 Packaging

Pallets, crates, cases HPE Packaging Directive by the Federal Association forWooden Packaging Materials, Pallets and Export Packaginge.V. (incorporated society) and the VDM

Transportation packaging Güntner transportation packaging is made from environmen-tally-friendly materials and is suitable for recycling

Please observe the symbols on the packaging, e.g.:

4.2 Transportation and unloading

The units designated for transport must be adequately protected against transport damage anddamaging atmospheric influences.

The units are delivered with approx. 1 bar overpressure (purified and dried air) (in accordance withregulation ADR 1.1.3.2 c governing the transportation of hazardous materials)..

Before removing the sealing caps, check whether overpressure prevails.

An unpressurised unit indicates a leak (transport damage! leak test!).

If a unit arrives without pressure, the manufacturer must be consulted immediately.

Before installation, release the transportation pressure and remove the sealing caps.

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NOTICEThe units must be protected against hard blows and hard setting down as well as against slippingand mechanical damage.

NOTICEOngoing mechanical stress caused by uneven road surfaces and potholes as well as vibrationsduring transport by sea can cause transport damage. Prior to transport by sea or in countries withcritical transport routes, add-on parts which can cause vibrations – especially fans and stands –must be dismantled for transport.

An unloading device that is appropriate for the weight of the equipment (empty weight: see or-der-specific offer documents) must always be used and operators must be qualified for unloadingthe equipment properly.

The equipment may only be lifted with a forklift with adequate fork length.

CAUTIONWhen transporting the units by crane or forklift, even weight distribution must be strictly ob-served.

CAUTIONWhen lifting: observe the position of centre of gravity (see symbols for transportation).

CAUTIONWhen transporting by crane: Only secure hooks and shackles for load takeup devices at locationsspecified by the manufacturer.

CAUTIONConnecting pieces and header tubes: Never use as attachment points for transportation.

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NOTICESpecial note: The sheet metal construction of the housing must not be crushed by belts – usecrane yokes if necessary (see transportation labels in the section on "General safety instruc-tions").

The units are transported as complete system components.

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The scope of delivery must be checked for completeness upon receipt. Any transport damage and/or missing parts must be recorded on the bill of delivery. These facts must be reported immediatelyin writing to the manufacturer.

4.3 Storage

NOTICEStorage of the units: Only with protection against dust, contamination, moisture, damage and oth-er damaging influences.

Letting the units stand around unnecessarily and permeation by humidity and dirt into the open unitis not permissible on account of the danger of corrosion and contamination.

The same applies to unpacking the units, cleaning and installation before start-up.

4.4 Safety

CAUTIONThe binding directives, standards and accident prevention regulations regarding the followingpoints must be observed:

• lifting gear• cranes• load suspension devices in lifting gear operation• powered industrial trucks

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5 Assembly and installation

5.1 Installation information

The units must be installed on foundations appropriate for their weight (see order-specific offer doc-uments for empty weight and working fluid filling) and must be bolted down with fastening bolts. Theoperator or installer of the equipment is responsible for ensuring that the bolted connections are ofthe appropriate strength.

When fastening the units, the following instructions must be observed:

• The diameters of the mounting holes have been statically determined by the manufacturer; thefastening bolts must be adapted accordingly.

• The fastening bolts must be secured against loosening by means of an appropriate locking de-vice.

• The fastening bolts must not be overtightened or stripped.• All fastening bolts must be tightened equally to achieve a load distribution that is as balanced as

possible.• When calculating the transferring bearing strength or suspension load, it is imperative that the

overall weight of the unit is taken into account.The tracking weight is calculated as follows:

Total unit weight = Net unit weight

+ weight of tube contents

+ additional weight (moisture, dirt or similar )

X : safety coefficient (X ≥ 1)

• In the course of maintenance intervals, the fastening bolts must be tested for functional safety(see "Maintenance").

''Güntner drycoolers'' are designed for outdoor operation. No external pressure drops are consid-ered.

NOTICEThe units must be installed perfectly horizontally.

CAUTIONWhen installed on the floor, all foundations must display the same height and retain this heightconstantly and under load so that no mechanical stresses arise in the unit. The units must be an-chored in their installation position to prevent the equipment from moving.

NOTICEInstalling the units: There must be an unobstructed flow of air into and out of the unit at all timeswithout air short-circuiting.

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NOTICEInstalling the units: In such a way that they can be inspected, checked and maintained from allsides at any time, i.e. there must be unobstructed access to the fluid-carrying and electrical com-ponents, connections and lines, and the pipeline labels must be identifiable as well as offering ad-equate space for testing.

WARNINGFluid-carrying pipelines: Protect against mechanical damage. Customer connections: Keep theunit free of load when mounting; force may not be exerted on the distribution and header pipes.

The following document(s) serve(s) as installation plans for fastening the units:

See order-specific offer documents (see section 2. "Technical data").

5.2 Installation guidelines

When installing the units, the following regulations must be observed:

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When installing up to 3 units

1 Air intake area

2 Direction of air

3 Height as per diagram

4 Clearance as per diagram

5 Cover plate

Requisite height of substructure in line with clearance by units GVW / GFW (only applicable for upto max. 3 units).

Air intake:

from below: across both front and long sides

from the side: across both external heat exchanger surfaces

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1 Requisite height of substructure 3 Clearance between units: 0 mm

2 ribbed length of unit (m) 4 Clearance between units: 200 mm

(based on a ribbed 5 Clearance between units: 400 mm

height of 2* 1.20 m) 6 Clearance between units: 600 mm

7 Clearance between units: 800 mm


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When installing up to 10 units

1 Air intake area

2 Direction of air



5 Cover plate

Requisite height of substructure in line with clearance by units GVW / GFW (only applicable for upto max. 10 units).

Air intake:

from below: across front and long sides

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Correction factor for fewer than 10 units side by side:

Number of unitsside by side

Number of fans per unit

2 3 4 5 6 7 8

2 0.7 0.6 0.5 0.4

3 0.8 0.7 0.6

4 0.9 0,8 0.7

5 0.9 0.8 0.7

6 0.9 0.8

7 1 0.9

8 1 0.9

9 1

10 1

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When installing an unlimited number of units

1 Air intake area

2 Direction of air



5 Cover plate

Requisite height of substructure in line with clearance by units GVW / GFW.

Air intake:

from below: across both front sides

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(based on a ribbed 5 Clearance between units: 400 mm

height of 2* 1.20 m) 6 Clearance between units: 600 mm



5.3 Assembly

All assembly work must be performed by qualified personnel. Damage caused by incorrect installa-tion invalidates the manufacturer’s warranty obligations.

The unit may only be fastened at the anchoring points provided.

After installation (or reconnection), the unit must be cleaned on the inside.

NOTICEThe unit is filled with dried air (see section 4.2. "Transportation and unloading"). Before discharg-ing the dried air: all pipeline installation work performed by the customer must be completed.

CAUTION

Fluid-carrying connections: They must be absolutely free of mechanical stress.The customer pipeline system must be provided with support before connectingto the unit.

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CAUTION

Soldering and/or welding work is only permitted on depressurised units.

NOTICEThe pipeline installation must be kept as short as possible. As few bends must be used as possi-ble and only those with large radii.

NOTICEThe unit is at risk of freezing in the case of insufficient frost protection and operation in areas en-dangered by frost (see section 1 "General safety instructions"). In units which can not be fully dis-charged, there is still a risk of freezing after discharge. At pressure test, operation and downtimewith water or units filled with insufficient frost protection and/or insufficient settings of the coldmedium transfer, they are destroyed at minus temperatures. Such damage is excluded from themanufacturer's warranty.

CAUTIONThe general requirements associated with installing drycoolers must be taken into considerationin accordance with the applicable regulations (see section 1. "General safety instructions").

CAUTIONIt must be possible to lock the unit in the event of a leak.

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CAUTION

The use of naked flames is prohibited at the installation site. Fireextinguishers and extinguishing agents used to protect the unitand operating staff must comply with the requirements outlinedin EN 378-3.

The following applies for the drycooler piping:

• Installation of pipes, valves and their components for lines to and from the unit in accordancewith EN 378-2 and the section on "Operating Refrigeration Plants, Heat Pumps and CoolingEquipment" in BGR 500 "Operating Working Equipment".

• Hard-solder all connections; if necessary, contact the manufacturer for soldering specifications.• Avoid impact-solder connections; use copper pipe ends expanded on one side (capillary solder-

ing); avoid leaks; solder carefully and thoroughly.• Avoid overheating during welding (danger of excessive heat waste).• Use inert gas when soldering (to avoid heat waste).• After completion of the pipe installation and before connecting the units, perform expert internal

cleaning and a pressure test.

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6 Start-up and operation

6.1 Start-up

Before starting up the unit, the electrical protective measures must be checked and determinedalong with readiness for operation using the following checklist:

• All of the connections in the cooling system must be checked for leaks and correct installationin accordance with the applicable standards and regulations (see section on "General safety in-structions"). ,

• All screw connections (particularly to fans), fastenings, electrical connections etc. must bechecked for correct installation.

• The complete wiring diagrams are to be found in the enclosed order-specific wiring diagrams.• The motor connection diagrams in the terminal boxes must be observed and correct adherence

thereto must be examined.• Before starting up, the wiring must be checked for correct installation and the electrical safety

measures must be checked for correct function.• Check whether fan power consumption matches the information on the nameplate.• Direction of rotation of fans must be checked and corrected if necessary.• All supply lines to the connecting boxes must be sealed in accordance with their insulation

class.• The fan power consumption must be checked on individual switching point settings.• In the case of step switching, ensure that the fan switching frequency specified by the motor is

not exceeded. Otherwise, the motor can be overloaded thermally and/or mechanically.• During frequency converter operation, the respective EMC guidelines must be adhered to.• The supply line must always be fused in accordance with the smallest wire cross-section.• All specified control equipment must be checked for correct function.• All safety equipment must be checked on preset on/off switching point settings.• When filling the cooling system with cold transfer medium, the specified concentration values

must be adhered to. Filling must be performed in mixed status (water/ethylene glycol).• After filling the cooling system, the unit must be properly ventilated.

6.2 Operation

6.2.1 Normal operation

To operate the unit, the entire system and electrical installations must be in operation.

The unit is switched on by opening the relevant valves on the inlet and outlet side of the system andby connecting it to the electrical system.

The unit is ready for operation once it has reached the specified operating point (see order-specificoffer documents.

The operating point setting

• Heat medium flow temperature• Heat medium return temperature or circulating heat medium volume• Air flow• Air intake temperatureis to be fixed as described in section 2.2 "Technical data".

If operating conditions deviate from the specifications (according to order-specific offer documents),it is imperative that the manufacturer is consulted.

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6.2.2 Taking out of service and final shutdown

The unit is taken out of service by disconnecting it from the system as a whole. In this case, the flu-id-carrying pipes must be disconnected from the system as a whole and the fans must be discon-nected from the electrical system.

CAUTION

When shutting down, observe the maximum operating pressure. If necessary,take precautions to ensure that this level can not be exceeded.

The units are system components of a refrigeration system. Taking out of service and recommis-sioning must be carried out in accordance with system-specific configuration as per the applicablestandards and accident prevention guidelines (see "General safety instructions").

The pressure test after recommissioning may only be carried out using the appropriate media andat suitable test pressure.

6.2.3 Modifications to the unit and non-permissible operating conditions and workingmethods

Modifications to the unit include:

• changing the function as specified in the section on "Function"• changing the operating point in accordance with the section on "Technical data"• changing over to another fluid.Non-permissible operating conditions and working methods as far as the warranty is concerned in-clude:

• changing the function as specified in the section on "Function"• changing the fan output (air volumes)• incorrect unit installation (see section on "Installation and assembly")• changing the operating point (heat transfer rate• changing the fluidThese changes, operating conditions and working methods may only be performed following agree-ment with and approval by the manufacturer if the warranty cover is to be maintained.

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7 Maintenance

7.1 General information

The unit does not require special servicing. However, regular checking and maintenance will ensuresmooth operation. The maintenance intervals depend on the installation site and operating condi-tions. During maintenance checks, special attention should be given to looking for soiling,, leaks,corrosion and vibrations.

For maintenance of the complex switch cabinet control, please refer to the separate Operating andMaintenance Instructions provided by Güntner-Elektronik.

7.2 Cleaning

The planned and guaranteed heat transfer rate of the unit can only be provided if the heat exchang-er coil is clean. Leaves, paper, dust, pollen and vapour deposits must be removed from the heat ex-changer coil and from the immediate vicinity of the unit.

Dry dust or dirt can be removed using a brush, a hand brush, compressed air (against the directionof air movement) or a powerful industrial vacuum cleaner.

NOTICEIf possible, always brush in the longitudinal direction of the fins. Use soft brushes.

NOTICENever brush sideways across the fins.

The jet of the cleaner should be held vertically to the heat exchanger coil where possible (max. de-viation of ± 5°) to prevent the fins from bending.

Heavier wet or greasy soiling must be removed using a high-pressure water jet (max. pressure of50 bar), steam pressure jet (max. pressure of 50 bar) at a minimum distance of 200 mm with a flatjet nozzle, using a neutral cleaning agent where possible, and always against the direction of airmovement.

Where possible, cleaning should be carried out from the inside to the outside and top down. Keepcleaning until all of the dirt has been removed.

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CAUTIONWhen cleaning: the unit must be disconnected from the refrigeration system as well as the pow-er supply. Water and steam jets must be kept well away from electric connections and electric mo-tors.

NOTICEOnly use cleaning agents which are compatible with the unit materials; they may be neither ag-gressive nor corrosive.

Contamination and other soiling on the fans must be removed on a regular basis as it causesunbalances and even disintegration or engine output loss. The actual fan motors are mainte-nance-free.

WARNINGFans and protection guards that have been removed or opened for maintenance must be returnedto their original positions before recommissioning.

NOTICEMechanical cleaning with hard objects (e.g. wire brushes, screwdrivers or similar) will damage theheat exchanger and is not allowed.

7.3 Maintenance and repair

Before commencing maintenance and repair work, the the heat medium must be removed and theelectrical connections disconnected from the power supply to enable work to be carried out safely.

Maintenance and repair work must be carried out in such a way that danger to people and goods isavoided as much as possible.

Maintenance and repair work must be carried out in accordance with EN 378-4.

The repaired unit must be tested in accordance with EN 378-2.

The following plans serve as recommendations concerning care, maintenance and checkups:

Recommended care and maintenance plan

Measure Medium Intervals

component cleaning Mechanically, water or clean-ing agent which is environ-mentally compatible or com-patible with the material

As required (visual inspec-tion)

Defrosting the heat exchang-er

See section 7.3. Depending on local condi-tions (stress caused by pen-etrating humidity, e.g. air orgoods)

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Measure Medium Intervals

Overall cleaning Mechanically, water or clean-ing agent which is environ-mentally compatible or com-patible with the material

As required (visual inspec-tion)

Leak test External visual inspection(EN 378-2; Annexes A, B)

Depending on the leak rate(see EN 378-2; Annex C)

Corrosion protection check See EN 378-2; Annex D Depending on the leak rate(see EN 378-2; Annex C)

Recommended checkup plan

Component / Controlpoint

Intervals Measure When

Heat exchangercoil / Fluid connec-tions

See VDMA standardsheet 24243

See VDMA standardsheet 24243

Immediately

Fans Monthly *) Replace fan or re-place runwheel

Immediately

Housing / Fasten-ings

Every 3 months Tighten Immediately

Electrical connec-tions

Monthly *) Repair or replace Immediately

*) control lamp in switch cabinet display

7.4 Water spray system instructions

Water spraying of a limited scope is recommended for reducing output peaks. When using waterquality, please note the following:

• max. 50 hours/year• Soft water (£4odH); provide softening unit if necessary• Water spraying at approx. 3 bar• Pipeline system with nozzles can be provided.

NOTICEDanger of corrosion when using non-permissible water quality.

NOTICEVDMA sheet: Please note "Instructions and recommendations concerning the operation andmaintenance of evaporation refrigeration systems".

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8 Güntner - Head office

Address: Güntner AG & Co. KGHans-Güntner-Strasse 2 - 6D-82256 Fürstenfeldbruck

Tel.: +49 (0)8141 242-0

Fax: +49 (0)8141 242-155

E-mail: [email protected]

Internet: http://www.guentner.de

Documents

Translation of Original Operating Instructions · | 2010-09 Drycooler – GFW Translation of Original Operating Instructions Transportation | Assembly | Operation | Maintenance