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26Analysentechnik mit System15 CHANGING THE COOLER AGGREGATENOTE!Before removing the cooler aggregate disconnect the cooler from all powersupplies;Before mounting the new aggregate check, if voltage corresponds with thespecification on the type plate;changing the cooler aggregate may only be carried out by qualified personnel!According to the cooler version, forced ventilated or not, cooler aggregates with differing quantity ofrefrigerant are available (spare parts list). As a spare part we deliver a complete replacement cooleraggregate (230V- or 115V), including the compressor, vaporizer, condenser, dryer and the capillarytube with the packaged refrigerant (230V R290, 115V R404A). You send us your defective, nondamaged, complete cooler aggregate in a corresponding safe packing carton taking over the costs ofshipping.Figure 11 shows the positioning of the cooler aggregate within the cooler casing.Front viewTop view1 fastening screw cooler aggregate2 fastening screw vaporizer3 terminal for earth cable4 vaporizer5 compressor6 valve for feeding with refrigerant7 condenser8 dryer9 capillary tubeFigure 11EC cooler aggregateOperating Instructions 3-4.1-ME 9501 - Electric Gas Cooler EC/ECSSubject to technical modifications.© M&C May 2002 Reproduction of this document or its content is not allowed without permission from M&C.
Analysentechnik mit System27For changing the cooler aggregate please carry out the following steps:• Remove the heat exchangers (11.1);• Loosen the fastening screws from the front panel of the cooler casing (Fig. 2);• Disconnect the earth wire of the front panel and remove the front panel;NOTE!If the LED function display is fitted in the front panel of the cooler casing (wallmounting) pay attention that the display will not be damaged by removing the frontpanel!• If the LED function display is fitted in the back panel of the cooler casing (19“ version) it must bepull out of the bracket before removing the cooler cover;NOTE!if replacing the LED function display please pay attention to the correct positioning(marked position respectively the connection cable points to the base plate ofthe casing)!• Loosen the fastening screws of the cooler cover;• Before removing the cooler cover disconnect the earth wire;• Disconnect the cooler compressor from the EC automatic control electronics (13.1). For thisremove the cap of the plastic housing (Fig. 2) and disconnect the cables from the correspondingterminals (Fig. 5) (replacement cooler aggregate does not include connecting cables).• Disconnect the earth wire at terminal 3;• Loosen the fastening screws 1 of the cooler aggregate;• Loosen screw 2 in the aluminium cooling block (it is covered under the isolation and is not visiblefrom outside). For this push the isolation backwards;• Loosen the vaporizer 4 by vibrations in the middle of the cooling block. If the vaporizer is bind it ispossible to loosen it through a drilling in the base plate of the cooler by means of compressed air;• Lift the complete cooler aggregate (4, 5, 7) out of the cooler casing;The mounting of the replacement cooler aggregate happens in opposite order. For this smear thealuminium distributor block and the vaporizer sufficient with thermal conductivity paste (part number90K0115).After replacing the aggregate the cooler has to be start up according to the instructions given inchapter 9. The cooler temperature can be controlled after approx. 30 minutes by means of athermometer in drilling 10.Operating Instructions 3-4.1-ME 9501 - Electric Gas Cooler EC/ECSSubject to technical modifications.© M&C May 2002 Reproduction of this document or its content is not allowed without permission from M&C.
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