Seifert KG 2025-48V Bedienungsanleitung

Version No. 1-1 - 10.01.2022 Doc. No. 9920250481 1 / 20

Table of Content 20250481

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

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

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

4. Settings 4 .........................................................................................................................................

5. Functional principle 4 .....................................................................................................................

6. Technical data 5 ..............................................................................................................................

7. Mounting 6 .......................................................................................................................................

8. Electrical Connection 10 .................................................................................................................

9. Controller Layout Description 13 ..................................................................................................

10. Wiring Diagram 14 ........................................................................................................................

11. Taking into Operation 16 .............................................................................................................

12. Trouble Shooting 17 .....................................................................................................................

13. Maintenance & Cleaning 18 .........................................................................................................

14. Transport & Storage 19 ................................................................................................................

15. Parts supplied / Spare parts / Accessories 20 ..........................................................................

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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.

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

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

UNIT.

Intended use

󰾬The unit is to be used exclusively for the dissipation of heat from control cabinets and enclosures (stationary,

not moving) 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

Operating error

Inappropriate work on or with the unit

The use of non-speciﬁed spare parts and accessories

Unauthorised 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 main

contractual 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 into

operation. Only authorised personnel is allowed to work on the unit. Unauthorised personnel must be prohibited

from working on the unit. Operating personnel must inform their superiors immediately of any malfunction of

the unit.

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.

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 protected

externally from overloading and electrical faults via suitable protective devices.

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. Settings

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 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. The cooling unit can dissipate large quantities of heat from electrical enclosures into

the ambient air and at the same time reduce the internal temperature to below that of the ambient air. The unit

works without problems in extreme ambient conditions (e.g. dusty and oily air). The operating temperature

range is between +20°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.

5. Functional principle

The unit functions on the principle of the compression refrigerator. The main components are: refrigerant

compressor, condenser, choke and evaporator. these four components of the refrigerant plant are connected

with 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 Warming

Potential [GWP] of 1430.

1. Air intake, cabinet side 7. Radial fan, ambient side

2. Radial fan, cabinet side 8. Condenser

3. Evaporator 9. Air outlet, ambient side

4. Air outlet, cabinet side 10. Filter dryer

5. Compressor 11. Expansion valve

6. Air intake, ambient side

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6. Technical data

Order Number 20250481

Cooling capacity L35L35 480 W

Cooling capacity L35L50 275 W

Compressor type Speed Control rotary compressor

Refrigerant / GWP R134a / 1430

Refrigerant Charge 82 g / 2.9 oz

High / low Pressure 30 / 6 bar

440 / 88 psig

Operating Temperature Range +10°C - +55°C

Air ﬂow volume (system / unimpeded) Ambient air circuit: 315 / 377 m³/h

Cabinet air circuit: 190 / 377 m³/h

Mounting Wall mounted / recessed

Housing Material Mild steel, powder coated

Dimensions A x B x C (D+E) 310 x 475 x 98 mm

Weight 9.2 kg

Cut out dimensions 142.5 x 440 mm

Voltage / Frequency 48 V DC

Current L35L35 max. 5.0 A

Max. current 7.5 A

Nominal power L35L35 max. 225 W

Max. power 320 W

Fuse 16 A (T)

Short-circuit current rating 5 kA

Connection Connection terminal block

Ingress Protection IP 54

Approvals CE

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7. Mounting

Unpacking unit:

Please follow the below steps to unpack the unit.

STEP 1:

Stand the cooling unit upright with the pre-cut packaging opening facing up.

STEP 2:

Pull oﬀ the packaging opening.

STEP 3:

Hang the transport loop of the unit in the transport hook and lift it slightly.

STEP 4:

Pull oﬀ the packaging and slide out the tray with installation material and the short version of the operating

manual.

STEP 5:

Pull oﬀ the remaining packaging.

STEP 6:

The cooling unit can now be attached to the enclosure.

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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. It must also be ensured in accordance with UL, that the

air outlet is not blowing air directly at an equipment operator. Should this be the case a barrier or duct shall be

provided to redirect the airﬂow.

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.

If the unit is mounted in a recessed position, the controller bracket can be pulled according to the wall thickness

of the enclosure outwards as per steps below.

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Cold air outlet duct:

When using a cold air outlet duct please follow the steps below.

Filter installation:

If you install / replace a ﬁlter please follow the steps below.

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Condensate management:

High humidity and low temperatures inside the enclosure can lead to condensation on the evaporator.

Condensate that ﬂows back into the enclosure can damage sensitive control electronics. The integrated

condensate evaporation of the cooling unit releases the condensate to the environment.

If too much condensation forms, the condensation is drained out of the cooling unit from the front through the

lower gill grilles. If this hose is removed, the cleaning drain MUST be open (see also point 13. Maintenance &

Cleaning).

In order to prevent the formation of excessive condensate, you should nevertheless:

- check the seals on regular intervals

- consider installing a door contact switch (order no. 3100001). This will prevent condensation forming

when enclosure door is left open.

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8. Electrical Connection

High electric voltage present. Installation, maintenance, cleaning and

any other work must be carried out by qualiﬁed personnel only. The

personnel must ensure that for the duration of this work the unit and

the cabinet are disconnected from the electrical supply and protected

against unauthorised/accidental reconnection.

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

Connection to the main electrical supply

The mains connection is made via a connector / terminal block. To 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.

Note the connections on the connector / terminal block from the following table

Normal (with power on) Alarm (normal with power on)

Terminal

1 + +ve supply

2 - -ve supply

3 T1 Door contact (bridged with T2)

4 T2 Door contact (bridged with T1)

5 P1 Alarm contact

6 P2 Alarm contact

7 P3 Alarm contact

Attention

Between contact T1 & T2 there is a 12V DC potential. These connections are to be connected to a door switch

only! If no door switch is used, these contacts are to be bridged and protected from unauthorized and/or

accidental external contact. Contacts P1, P2 & P3 are potential free and require an external power source if

wired to operate external components (indicator lamps, switches...). The load on these contacts is not to exceed

30V DC, 4 A or 120/250V AC, 4A. If wired to external components it must be ensured that the wiring and

connections are double insulated and safe against touch and protected from unauthorized and/or accidental

external contact.

Ensure that the correct polarity is maintained. The fans should have

clockwise rotation.

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