Seifert KG 4308-120V, KG 4320 User Manual

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Table of Content KG 4308-120V

1. User manual 2 ...................................................................................................................

2. Legal regulations 2 ...........................................................................................................

3. Safety instructions 3 ........................................................................................................

4. Technical information 4 ...................................................................................................

5. Functional principle 5 ......................................................................................................

6. Technical data 6 ................................................................................................................

8. Mounting 7 .........................................................................................................................

9. Mounting Principle 8 ........................................................................................................

10. Dimensions (H x W x D) 9 ..............................................................................................

11. Electrical connection 10 .................................................................................................

12. Wiring diagram 10 ..........................................................................................................

13. Taking into operation 12 ...............................................................................................

14. Trouble shooting 12 ......................................................................................................

15. Maintenance & Cleaning 12 ..........................................................................................

16. Transport & Storage 13 .................................................................................................

17. Parts supplied 13 ............................................................................................................

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1. User manual

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

Avoid any dangers.

●

Reduce repair costs and stoppages.

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

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

Conditions of use
󰾬The unit is to be used exclusively for the dissipation of heat from control cabinets and enclosures in

order to protect temperature sensitive components in an industrial environment. To meet the
conditions of use, all the information and instructions in the instruction manual must be adhered to.

General danger

Indicates compulsory safety regulations which are not
covered by a specific pictogram such as one of the following.

High electric voltage

Indicates electric shock danger.

Important safety instruction

Indicates instructions for safe maintenance and operation of
the unit.

Attention

Indicates possible burns from hot components.

Attention

Indicates possible damage to the unit.

Instruction

Indicates possible danger to the environment.

2. Legal regulations

Liability

The information, data and instructions contained in this instruction manual are current at the time of
going to press. 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 descriptions contained in this manual. No liability can be accepted for
damage and production caused by:

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Disregarding the instruction manual

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Operating error

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Inappropriate work on or with the unit

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The use of non-specified spare parts and accessories

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Unauthorised modifications or changes to the unit by the user or his personnel

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

3. Safety instructions

Upon delivery the unit is already meeting current technical standards therefore it can be safely taken
into operation. Only trained specialists are allowed to work on the unit. Unauthorised personnel must
be prohibited from working on the unit. Operating personnel must inform their superiors immediately if
any malfunction of the unit becomes apparent.
Please note that before starting to work on or with the unit, a procedure must be carried out inside the
cabinet on which the unit is to be mounted.
Before commencing work inside the cabinet, the control cabinet manufacturer's instruction must be
read 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 safety regulations. One can find dangerous voltages (above 50
V AC or above 100 V DC)

Behind the control cabinet doors.

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On the power supply in the unit housing.

●

The unit has to be fused according to the type plate and the wiring diagram, and must be protected
externally from overloading and electrical faults via suitable protective devices such as ground fault
protection breakers.

Danger through incorrect work on the unit

The unit can only be installed and maintained by technical competent and
qualified personnel, using only supplied material according to the supplied
instructions.

󰾬

Danger from electrical voltage

Only specialised personnel are allowed to maintain and clean the unit. The
personnel must ensure that for the duration of the maintenance and cleaning, the
unit is disconnected from the electrical supply.

Attention

Damage to the unit through the use of inappropriate cleaning materials. Please do
not use aggressive cleaning material.

Instruction

Damage to the environment through unauthorised disposal. All spare parts and
associated material must be disposed according to the environmental laws.

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4. Technical information

The cooling unit is intended to be used as a complementary accessory to larger industrial
equipment. The unit is used where heat needs to be dissipated from electrical control cabinets or
similar enclosures in order to protect heat sensitive components. It is not intended for household use.
The unit has two completely separate air circuits which ensure that the clean cabinet air does not
come into contact with the ambient air which may well be dirty or polluted. Control cabinet cooling
units can dissipate large quantities of heat from sealed enclosures such as electrical enclosures into
the ambient air and at the same time reduce the cabinet internal temperature to below that of the
ambient air.
The unit can function without problems in extreme ambient conditions (e.g. dusty and oily air) with
a standard operating temperature ranging between +10°C and +55°C. Units can be ordered with an
additional electrical cabinet heater. For the cooling capacities and evironmental ratings please refer to
the type plate data.

Controller

The unit is equipped with a temperature controller which regulates the function of the air-conditioning
cycle. At normal working conditions the display shows the temperature inside the enclosure. The
cooling set point for the interior of the enclosure (parameter St / St1) is pre-set at 35°C and can be
adjusted between +20°C and +50°C.

To change the cooling set point St/St1:

1. Press ‘Set’ till St/St1 appears on the display.

2. Press the Up/Down buttons to adjust the temperature setting.

3. Press ‘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 appears on the display.

3. Press the Up/Down buttons to adjust the temperature.

4. Press set to save the new setting.

Important Note: when changing settings ensure that: (St2 + 5K) < St1

The unit also has a potential free high temperature alarm relay (normally closed configuration) that is
pre-set to switch when the enclosure temperature exceeds 55°C. If necessary the alarm relay
configuration and the set point can be changed via the controller’s parameters. Kindly contact your
nearest service / sales partner for further details on how to change these parameters.

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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 Warning 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, and condensate evaporator has an approximate evaporation capacity of
250ml/hr. The recipient has an overflow socket at the bottom of the unit. A drain pipe is supplied to
connect to overflow socket.

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6. Technical data

Order Number 43081081
Cooling capacity L35L35 750 W @ 50 Hz

780 W @ 60 Hz

Cooling capacity L35L50 580 W @ 50 Hz

610 W @ 60 Hz

Compressor Reciprocating compressor
Refrigerant / GWP R134a / 1430
Refrigerant charge 205 g / 7.2 oz
High / low pressure 29.5 / 6 bar

425 / 88 psig

Temperature range +10°C - +55°C
Air volume flow Ambient air circuit: 435 m³/h

Cabinet air circuit: 200 m³/h

Mounting Recessed
Housing Material Mild steel, powder coated
Dimension HxWxD 715 x 372 x 260 mm
Weight 33.7 kg
Voltage / Frequency 120 V ~ 50/60 Hz
Current L35L35 5.8 A @ 50 Hz

5.8 A @ 60 Hz

Starting current 33 A
Max. current 6.0 A
Nominal power L35L35 470 W @ 50 Hz

470 W @ 60 Hz

Max. power 595 W
Fuse 12 A (T)
Connection Connection terminal block
IP class EN 60529 External circuit: IP 24

Internal circuit: IP 54

Approvals CE, cURus, RoHS

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8. Mounting

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

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
any condition. At cooling unit selection always cater for a safety margin of at least 15% extra cooling
output in the worst 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.
Cooling unit enclosure air suction hole must be installed in the highest possible point. When installing
the unit on a door ensure it can take the weight.
Before drilling the enclosure ensure the fixing elements and couplings will not interfere with the
equipment inside the enclosure itself. Disconnect power before starting any work inside the enclosure.
Following this 1:1 Scale Drilling Template drill the holes and make the required cuts on the enclosure.
This template may have been affected by storage conditions, please check this template by verifying
values of the largest dimensions before drilling. Fit the sealing strip on the cooling unit on the side
connected to the enclosure and follow the installation diagram.

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

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9. Mounting Principle

1 M8 Lifting hook
2 PVC washer
3 Enclosure
4 Cooling unit
5 M6 flat washer
6 M6 Toothed washer
7 M6 Bolt
8 Sealing tape

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10. Dimensions (H x W x D)

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11. Electrical connection

Door Switch

The unit can be switched on and of via a door contact switch. When delivered the door contact
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.

12. Wiring diagram

#1 Not present on KG4304 unit
#2 Models with condensate evaporator

C Controller
EB External Blower
IB Internal Blowers
PC 9 Pole connector
CC 7 core cable
Mc Motor compressor
AT Auotransformer
1 120V L1
2 /
3 N / L2
4 Earth
5 /
6 Alarm P1
7 Alarm P2
8 Door T1
9 Door T2

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13. Taking into operation

Attention! The unit can be damaged by lack of lubricant. To ensure that the compressor is

adequately lubricated the oil, which has been displaced during transport, must be allowed to flow back
into it. The unit must therefore be allowed to stand for at least 30 min. before being connected to the
mains and taken into operation.
Upon connection the internal fan will start working. If the temperature inside the enclosure is higher
than the set value of the controller both the compressor and external air fan start working. Once the
air inside the enclosure 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.

14. Trouble shooting

Failure Condition Cause Solution

Unit

doesn't

cool

Internal fan does not work Power not connected. Verify power supply
Internal fan works, external fan

and compressor don't work

Enclosure temperature is below
setting temperature (St)

Verify values of parameter

"St"
Door switch contact is open Verify door switch
Controller doesn't work Replace controller

Internal fan works, external fan
and compressor 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

External and internal fan work,
compressor does not work

Compressor motor electrical
failure

Have compressor replaced

by qualified service technician
Capacitor for compressor failed Replace capacitor

Compressor works, external fan
doesn't work

External fan needs to be
replaced

Replace external fan

Enclosure

temperature

too hot

Compressor and fans (external
and internal) work all the time

Cooling unit undersized Enclosure needs a cooling

unit with with higher capacity

Compressor and external fan
work in alternating mode
(ON / OFF)

Thermal compressor protector
triggered

Verify if ambient temperature

is too high,clean condenser
Refrigerant leakage Contact dealer/service center

Excessive

condensate

Enclosure door open

Ambient air gets into the
enclosure

Ensure door is closed, add

a door switch and connect

it to controller

Enclosure door closed

Enclosure IP protection class
is below IP54

Seal all openings of the

enclosure
Damaged or misplaced sealing

strip

Repair sealing strip

accordingly

15. Maintenance & Cleaning

Always switch power supply off before starting any maintenance on
the unit.

The cooling unit is generally maintenance free and can be operated without filters in most
environments. For units with filters these should be checked, cleaned and if necessary replaced on a
regular basis. In addition the unit should have regular functional tests (approx. every 2,000 hours
depending on the grade of ambient pollution).

Disposal

The unit contains R134a refrigerant and small quantities of lubricating oil. Replacement, repairs and

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final disposal must be done according to the regulations of each country for these substances.

16. Transport & Storage

Malfunction due to transport damage

On delivery the carton box containing the unit must be examined for signs of transport damage. Any
transport damage to the carton box could indicate that the unit itself has been damaged in transit
which in 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°C to + 70°C

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Relative humidity (at 25°C): max. 95 %

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Returning the unit

To avoid transport damage the unit should be returned in the original packing or in a packing case and
must be strapped 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

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packing.
The unit must be shipped in the same position as it was mounted.

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󰾬The unit must be protected by shock resistant padding (hard foam corner pieces, strips or cardboard

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corner pieces).

17. Parts supplied

1 x Cooling unit with individual packaging
1 x Plastic bag containing:
1 x Instruction manual with techn. information
1 x CE declaration of conformity
1 x Drilling template in 1:1 scale
8 x M6 bolts
8 x washers
8 x locking washers
1 x 10 x 3 mm self-adhensive sealing strip
1 x Flexible drain pipe
1 x Female connector with bridged door contact

Seifert Systems GmbH Seifert Systems Ltd. Seifert Systems AG Seifert Systems Inc. Seifert Systems Pty Ltd.

Haßlinghauser Str. 156 HF09/10 Wilerstrasse 16 75 Circuit Drive 105 Lewis Road
Hal-Far Industrial Estate North Kingstown Wantirna South
58285 Gevelsberg Birzebbuga, BBG 3000 4563 Gerlafingen RI 0285 3152 Victoria
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