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Version Nr. 1-9 - 06.06.2022

Doc. No. 9943100001

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5. Functional principle

The cooling unit for enclosures works on the basis of a refrigeration circuit consisting of four main
components: compressor (1), evaporator (2), condenser (3) and expansion device (4). 
The circuit is hermetically sealed and R134a refrigerant circulates inside it (R134a is chlorine free and has an
Ozone Destruction Potential [ODP] of 0 and a Global Warming Potential [GWP] of 1430). The compressor
compresses the refrigerant (thus taking it to high pressure and high temperature), and pushes it through the
condenser, where it is cooled by ambient air thus passing from the gas to the liquid state. At the liquid state it
then passes through the capillary pipe being a much lower pressure the refrigerant arrived to the evaporator
where it absorbs the necessary heat to change from liquid to gas state. The gas is then drawn back into the
compressor completing the cycle.

Gestion de la condensation
Dans des environnements humides et de basses températures internes d'enceintes, une condensation peut se
former sur le serpentin de l'évaporateur. Les unités de refroidissement standard 43XXX0XXX ont une purge
d'évacuation vers le fond de l'unité pour le raccordement au tuyau d'évacuation.
Les unités de refroidissement 43XXX1XX incluent un évaporateur condenseur interne basé sur des cartouches
autorégulatrices CTP. Le condensat est égoutté vers un récipient interne où il s'évapore quand il est en contact
avec la surface de la cartouche. La vapeur en résultant est dirigée vers le condenseur. La cartouche de
chauffage CTP est raccordée en permanence. Le récipient a une purge pour le trop-plein en bas de l'unité. Un
tuyau d'évacuation est fourni pour se brancher sur la purge de trop-plein.

Summary of Contents for 43040001

Page 1: ...onal principle 5 6 Technical data 6 7 Performance graph 7 8 Mounting 8 9 Mounting Principle 9 10 Cut out dimensions 10 11 Dimensions H x W x D 11 12 Electrical connection 12 13 Controller 13 14 Wiring...

Page 2: ...nstruction manual must be adhered to General danger Indicates compulsory safety regulations which are not covered by a speci c pictogram such as one of the following High electric voltage Indicates el...

Page 3: ...d with regards 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 saf...

Page 4: ...air does not come into contact with the ambient air which may well be dirty or polluted Enclosure cooling units can dissipate large quantities of heat from sealed enclosures such as electrical enclos...

Page 5: ...d to the evaporator where it absorbs the necessary heat to change from liquid to gas state The gas is then drawn back into the compressor completing the cycle Gestion de la condensation Dans des envir...

Page 6: ...em unimpeded Ambient air circuit 240 500 cfm Cabinet air circuit 175 324 cfm Mounting External Housing Material Mild steel powder coated Dimension H x W x D 25 6 x 12 4 x 10 2 inch Weight 66 lbs Cut o...

Page 7: ...Version Nr 1 9 06 06 2022 Doc No 9943100001 7 17 7 Performance graph...

Page 8: ...e case a barrier or duct shall be provided to redirect the air ow Cooling unit enclosure air suction hole must be installed in the highest possible point When installing the unit on a door ensure it c...

Page 9: ...No 9943100001 9 17 9 Mounting Principle Do not use within the rst 15 minutes after installation 1 M6 screws 2 M6 at washers 3 M6 toothed washers 4 Cabinet 5 Sealing tape 6 Cooling unit 7 Lifting hook...

Page 10: ...Version Nr 1 9 06 06 2022 Doc No 9943100001 10 17 10 Cut out dimensions...

Page 11: ...Version Nr 1 9 06 06 2022 Doc No 9943100001 11 17 11 Dimensions H x W x D...

Page 12: ...ng to EN60730 1 8 4 A N O 6 4 A N C 2 2 A N O N C 250Vac 100000 cycles UL 873 8A resistive 2FLA 12LRA pilot duty C300 250Vac 30000 cycles These contacts are not suitable for uorescent loads neon light...

Page 13: ...ress Set to save the new setting To change the heating set point St2 units with internal heater only 1 Press Set till St1 appears on the display and release the button 2 Press again Set till St2 appea...

Page 14: ...Version Nr 1 9 06 06 2022 Doc No 9943100001 14 17 14 Wiring diagram...

Page 15: ...don t work Display shows alternating OFF and temperature The sequence of the phases inside the power supply connector is incorrect Change phases inside power supply connector Unit doesn t cool Externa...

Page 16: ...n the worst case could mean that the unit will not function The unit can only be stored in locations which meet the following conditions temperature range 40 F to 158 F Relative humidity at 77 F max 9...

Page 17: ...d Seifert Systems AG Seifert Systems GmbH Seifert Systems Ltd Seifert Systems Inc Seifert Systems Pty Ltd Albert Einstein Str 3 HF09 10 Wilerstrasse 16 B rnthal 1 Rep O ce 75 Circuit Drive 105 Lewis R...

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