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Table of Content 4535000

1. User manual 2 .................................................................................................................................. 2. Legal regulations 2 ......................................................................................................................... 3. Safety instructions 3 ...................................................................................................................... 4. Controller functions 4 ..................................................................................................................... 5. Functional principle 4 ..................................................................................................................... 6. Technical data 5 .............................................................................................................................. 7. Mounting 6 ....................................................................................................................................... 8. Dimensions (H x W x D) 7 ............................................................................................................... 9. Electrical connection 8 ................................................................................................................... 10. Wiring diagram 10 ......................................................................................................................... 11. Taking into operation 12 .............................................................................................................. 12. Trouble shooting 12 ...................................................................................................................... 13. Maintenance & Cleaning 13 ......................................................................................................... 14. Transport & Storage 13 ................................................................................................................ 15. Parts supplied 14 ..........................................................................................................................

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1. User manual

This instruction manual contains information and instructions to enable the user to work safely, correctly andeconomically on the unit. Understanding and adhering to the manual can help one:

Avoid any dangers.

Reduce repair costs and stoppages.

Extend and improve the reliability and working life of the unit.

PLEASE ENSURE TO USE THE RIGHT VERSION OF THE INSTRUCTION MANUAL SUITABLE FOR YOURUNIT.

Conditions of useThe unit is to be used exclusively for the dissipation of heat from control cabinets and enclosures in order toprotect temperature sensitive components in an industrial environment. To meet the conditions of use, all theinformation and instructions in the instruction manual must be adhered to.

General dangerIndicates compulsory safety regulations which are notcovered by a specific pictogram such as one of the following. High electric voltageIndicates electric shock danger.

Important safety instructionIndicates instructions for safe maintenance and operation ofthe unit. AttentionIndicates possible burns from hot components. AttentionIndicates possible damage to the unit.

InstructionIndicates possible danger to the environment.

2. Legal regulations

LiabilityThe information, data and instructions contained in this instruction manual are current at the time of going topress. We reserve the right to make technical changes to the unit in the course of its development. Therefore,no claims can be accepted for previously delivered units based on the information, diagrams or descriptionscontained in this manual. No liability can be accepted for damage and production caused by:

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Disregarding the instruction manualOperating errorInappropriate work on or with the unitThe use of non-specified spare parts and accessoriesUnauthorised modifications or changes to the unit by the user or his personnel

The supplier is only liable for errors and omissions as outlined in the guarantee conditions contained in the maincontractual agreement. Claims for damages on any grounds are excluded.

3. Safety instructions

Upon delivery the unit is already meeting current technical standards and can therefore be safely taken intooperation. Only authorised personnel is allowed to work on the unit. Unauthorised personnel must be prohibitedfrom working on the unit. Operating personnel must inform their superiors immediately of any malfunction ofthe unit. Please note that before starting to work on or with the unit, a procedure must be carried out inside the cabineton which the unit is to be mounted.Before commencing work inside the cabinet, the control cabinet manufacturer's instruction must be read withregards to:

Safety instructions.Instructions on taking the cabinet out of operation.Instructions on the prevention of unauthorised cabinet reconnection.

The electric equipment meets the valid safety regulations. One can find dangerous voltages (above 50 V AC orabove 100 V DC)

Behind the control cabinet doors.On the power supply in the unit housing.

The unit has to be operated according to the type plate and the wiring diagram, and must be protectedexternally from overloading and electrical faults via suitable protective devices such as ground fault protectionbreakers.

Danger through incorrect work on the unitThe unit can only be installed and maintained by technical competent and qualifiedpersonnel, using only supplied material according to the supplied instructions.

Danger from electrical voltageOnly specialised personnel are allowed to maintain and clean the unit. The personnel mustensure that for the duration of the maintenance and cleaning, the unit is disconnected fromthe electrical supply.

AttentionDamage to the unit through the use of inappropriate cleaning materials. Please do not useaggressive cleaning material.

InstructionDamage to the environment through unauthorised disposal. All spare parts and associatedmaterial must be disposed according to the environmental laws.

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4. Controller functions

The cooling unit is intended to be used as a complementary accessory to larger industrial equipment,and is used where heat needs to be dissipated from electrical control cabinets or similar enclosures in order toprotect heat sensitive components. It is not intended for household use. The unit has two completely separateair circuits which ensure that the clean cabinet air does not come into contact with the ambient air which maywell be dirty or polluted. The cooling unit can dissipate large quantities of heat from electrical enclosures intothe ambient air and at the same time reduce the internal temperature to below that of the ambient air. The unitworks without problems in extreme ambient conditions (e.g. dusty and oily air). The operating temperaturerange is between +20°C and +55°C. Units can be ordered with an additional electrical cabinet heater. Forthe cooling capacities and evironmental ratings please refer to the type plate data.

5. Functional principle

The unit functions on the principle of the compression refrigerator. The main components are: refrigerantcompressor, condenser, choke and evaporator. these four components of the refrigerant plant are connectedwith each other by pipes to form a hermetically sealed system in which the refrigerant (R134a)circulates. R134a is chlorine free and has an Ozone Destruction Potential [ODP] of 0 and a Global WarningPotential [GWP] of 1430.

1. Air intake, cabinet side 7. Radial fan, ambient side2. Radial fan, cabinet side 8. Condenser3. Evaporator 9. Air outlet, ambient side4. Air outlet, cabinet side 10. Filter dryer5. Compressor 11. Expansion valve6. Air intake, ambient side

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6. Technical data

Order Number 4535000

Cooling capacity L35L35 900 W @ 50 Hz950 W @ 60 Hz

Cooling capacity L35L50 700 W @ 50 Hz750 W @ 60 Hz

Compressor Rotary piston compressorRefrigerant / GWP R134a / 1430Refrigerant charge 465 g / 16 oz

High / low pressure 35 / 6 bar508 / 88 psig

Temperature range +10°C - +55°C

Air volume flow (system / unimpeded) Ambient air circuit: 450 / 1200 m³/hCabinet air circuit: 210 / 650 m³/h

Mounting 19" rackHousing Material Mild steel, powder coatedDimension H x W x D 266 x 483 x 565 mmWeight 45 kgVoltage / Frequency 230 V ~ 50/60 Hz

Current L35L35 3.0 A @ 50 Hz3.2 A @ 60 Hz

Starting current 7 AMax. current 3.5 A

Nominal power L35L35 700 W @ 50 Hz750 W @ 60 Hz

Max. power 805 WFuse 10 A (T)Connection 3 m connection cableIngress protection IP 44Approvals CE, cURus, RoHS

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7. Mounting

The power supply rating on unit rating plate must comply with mainsrating.

Always disconnect the power supply before opening the unit.

The heat load to be dissipated from enclosure should not exceed specific cooling output of the unit at anycondition. At cooling unit selection always cater for a safety margin of at least 15% extra cooling output in theworst conditions. Air inlets and outlets must be completely free from obstruction.Ensure that flows of air leaving and entering the cooling unit, internal and external, are not obstructed. Coolingunit enclosure air suction hole must be installed in the highest possible point. When installing the unit on a doorensure it can take the weight.Before drilling the enclosure ensure the fixing elements and couplings will not interfere with the equipmentinside the enclosure itself. Disconnect power before starting any work inside the enclosure. Following this 1:1Scale Drilling Template drill the holes and make the required cuts on the enclosure. This template may havebeen affected by storage conditions, please check this template by verifying values of the largest dimensionsbefore drilling. Fit the sealing strip on the cooling unit on the side connected to the enclosure and follow theinstallation diagram.

Note: In case of 19" rack mounted units please ignore the above mounting instructions.

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8. Dimensions (H x W x D)

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9. Electrical connection

High electric voltage present. Installation, maintenance, cleaning andany other work must be carried out by qualified personnel only. Thepersonnel must ensure that for the duration of this work the unit andthe cabinet are disconnected from the electrical supply and protectedagainst unauthorised/accidental reconnection.

Note: As soon as preperations are finished, mounting procedures may proceed.

Connection to the main electrical supplyTo connect the unit to the mains proceed as follows:

Take the control cabinet out of operation in the prescribed manner.See the connection details on the circuit diagram.

Attention

Between contact T1 & T2 there is a 12V DC potential. These connections are to be connected to a door switchonly! If no door switch is used, these contacts are to be bridged and protected from unauthorized and/oraccidental external contact. Contacts P1 & P2 are potential free and require an external power source if wired tooperate external components (indicator lamps, switches...). The load on these contacts is not to exceed 30VAC/DC, 5 A. If wired to external components it must be ensured that the wiring and connections are doubleinsulated and safe against touch and protected from unauthorized and/or accidental external contact.

Ensure that the correct polarity is maintained. The fans should haveclockwise rotation.

Fault warning connection

The unit is delivered with the potential-free alarm contact, which is included in the connection cable, set on thePC-board as an opener. The temp. adjustment range is between 25°C (left-hand stop) and 55°C (right-handstop). The alarm temp. is preset at 50°C.

To change the alarm setting:

Remove the outer cover.Remove the fixing screws from the PCB cover and the earth wire from inside it.Lift off the PCB coverUsing a screwdriver turn the alarm temp. potentiometer on the PC-board slightly to the right (higher) orthe left (lower)please note that the setting for the alarm signal must be at least 5°C higher than the setting for thecabinet's internal temperatureClose the unit as prescribed.

Check that the new setting meets requirments and if not repeat the above process.

Door contact switch connection

If required the unit can be switched on and off by a door contact switch. The door contact is connected to thered & pink wires included in the connection cable which are bridged when delivered. Should after use a doorcontact no longer be required, the loose wires can be connected to a separate terminal.

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To connect the door contact switch:

Remove the bridge from terminals T1 & T2.

Connect the door contact switch to terminals T1 & T2.

The contact must be closed when the cabinet door is closed.

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10. Wiring diagramM1 Radial fan cold sideM2 Radial fan warm side M3 Compressor motorC1 Capacitor for M1C2 Capacitor for M2C3 Capacitor for M3TVR1 NTC temperature filterP Connection terminalTB Test button X1 Earth connectorR11 Control temperature potentiometer R12 Alarm temperature potentiometerL1 LiveN NeutralPE EarthT1 Door contact (bridged with T2)T2 Door contact (bridged with T1)

Normal (with power ON) Alarm (with power ON)P1 Alarm contactP2 Alarm contactAC When an R2S-type blower is used the respective capacitor is not to be assembled. The brown

wire is to be fixed instead of the black wires positionAF Alternative fixing for M3/C3

Cable colors Temperature settingsa black Position Temp °C Alarm °Cb blue 1 20 25c brown 2 25 30d green, yellow 3 30 35e grey 4 35 40f pink 5 40 45g red 6 45 50 7 50 55

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11. Taking into operation

Attention! The unit can be damaged by lack of lubricant. To ensure that the compressor is adequatelylubricated the oil, which has been displaced during transport, must be allowed to flow back into it. The unit musttherefore be allowed to stand for at least 30 min. before being connected to the mains and taken into operation.Compressor based cooling units / system must be protected with a MCB Type D or K. Upon connection the internal fan will start working. If the temperature inside the enclosure is higher than theset value of the controller both the compressor and external air fan start working. Once the air inside theenclosure reaches the set temperature the compressor and external fan will stop. The unit is pre-set at 35°C,which is suitable for most of the electronic devices.

12. Trouble shooting

Failure Condition Cause Solution

Unit doesnot cool

Internal fan doesnot work

Power not connected. Verify power supply

Internal fan works,external fan andcompressor don'twork

Enclosure temperatureis below settingtemperature (St)

Verify values of parameter"St"

Door switch contact isopen

Verify door switch

Controller doesn't work Replace controllerInternal fan works,external fan andcompressor don'twork Display showsalternating "OFF"and temperature

The sequence ofthe phases inside thepower supply connectoris incorrect

Change phases insidepower supply connector

Unit doesnot cool

External and internalfan work,compressor does notwork

Compressormotor electrical failure

Verify external fan,verify ambient temperature,clean condenser

Capacitor forcompressor failed

Replace capacitor

Compressor works,external fan doesn'twork

External fan needs to bereplaced

Replace external fan

Enclosureover heating

Compressor andfans (external andinternal) work all the time

Unit cooling undersized Enclosure needs a bigger cooling unit

Enclosure needs abigger cooling unit

Thermal compressor protector triggered

Verify ambienttemperature, clean condenser

Refrigerant leakage Contact dealer/servicecenter

Excessive condensate

Door enclosure openAmbient air gets intothe enclosure

Ensure door is closed, adda door switch and connect itto controller

Door enclosureclosed

Enclosure IP degree minimum IP54

Seal openings on enclosure

Damaged misplaced sealing strip

Repair strip accordingly

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13. Maintenance & Cleaning

Always switch power supply off before starting any maintenance onthe unit.

The cooling unit is generally maintenance free and can be operated without filters in most environments. Forunits with filters these should be checked, cleaned and if necessary replaced on a regular basis. In addition theunit should have regular functional tests (approx. every 2,000 hours depending on the grade of ambientpollution).DisposalThe cooling unit contains R134a refrigerant and small quantities of lubricating oil. Replacement, repairs andfinal disposal must be done according to the regulations of each country for these substances.

14. Transport & Storage

Malfunction due to transport damageOn delivery the carton box containing the unit must be examined for signs of transport damage. Any transportdamage to the carton box could indicate that the unit itself has been damaged in transit which in the worst casecould mean that the unit will not function.The unit can only be stored in locations which meet the following conditions:

temperature range: - 40°C to + 70°CRelative humidity (at 25°C): max. 95 %

Returning the unitTo avoid transport damage the unit should be returned in the original packing or in a packing case and must bestrapped to a pallet. If the unit cannot be returned in the original packing please ensure that:

A space of at least 30 mm. must be maintained at all points between the unit and the external packing.The unit must be shipped in the same position as it was mounted.The unit must be protected by shock resistant padding (hard foam corner pieces, strips or cardboardcorner pieces).

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15. Parts supplied

1 x Cooling unit1 x User manual1 x CE Declaration of Conformity

Seifert Systems GmbH Seifert Systems Ltd. Seifert Systems AG Seifert Systems Inc. Seifert Systems Pty Ltd.Albert - Einstein Str. 3 HF09/10 Wilerstrasse 16 75 Circuit Drive 105 Lewis Road Hal-Far Industrial Estate North Kingstown Wantirna South42477 Radevormwald Birzebbuga, BBG 3000 4563 Gerlafingen RI 0285 3152 VictoriaDeutschland Malta Switzerland USA AustraliaTel. +49 2195 68994-0 Tel. +356 2220 7000 Tel. +41 32 675 35 51 Tel. +1 401-294-6960 Tel. +61 3 98 01 19 06Fax +49 2195 6899420 Fax +356 2165 2009 Fax +41 32 675 44 76 Fax +1 401-294-6963 Fax. +61 3 98 87 08 45info.de@seifertsystems.com info@seifertsystems.com info.ch@seifertsystems.com info.us@seifertsystems.com info@seifertsystems.com.au