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Version Nr. 1-5 - 30.06.2022

Doc. No. 9943252081

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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.

Condensation management
In environments with humidity and low internal enclosure temperatures, condensation may form on the
evaporator coil. Standard cooling units 43XXX0XXX  have a drain socket towards the bottom of the unit for
connection of the drain pipe. 
Cooling units 43XXX1XX include an internal condensate evaporator based on self-regulating PTC cartridges.
Condensate is drained to an internal recipient where it evaporates when in contact with the cartridge surface.
Resulting steam is directed towards the condenser. The PTC heater cartridge is permanently connected. The
recipient has an overflow socket at the bottom of the unit, for which a drain pipe is supplied.

Содержание 43252081

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 5: ...e 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 compre...

Страница 6: ...41 706 cfm Cabinet air circuit 323 706 cfm Mounting Recessed Housing Material Mild steel powder coated Dimension H x W x D 51 x 21 9 x 13 4 inch Weight 161 lbs Cut out dimensions 19 4 x 48 6 inch Volt...

Страница 7: ...Version Nr 1 5 30 06 2022 Doc No 9943252081 7 18 7 Performance graph...

Страница 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...

Страница 9: ...No 9943252081 9 18 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...

Страница 10: ...Version Nr 1 5 30 06 2022 Doc No 9943252081 10 18 10 Cut out dimensions...

Страница 11: ...Version Nr 1 5 30 06 2022 Doc No 9943252081 11 18 11 Dimensions H x W x D...

Страница 12: ...terminals are bridged on the female connector To connect the door contact switch remove the bridge and connect door contact switch The contact must be closed when the cabinet door is closed SCCR Refe...

Страница 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...

Страница 14: ...e evaporator PSM Phase sequence module AT Autotransformer EB External blower IB Internal blower PC 9 pole connector CC 7 core cable CC2 8 core cable AWG 20 PC2 4 pole connector PC CONNECTIONS 1 L1 2 L...

Страница 15: ...Version Nr 1 5 30 06 2022 Doc No 9943252081 15 18...

Страница 16: ...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...

Страница 17: ...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...

Страница 18: ...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 Ro...

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