Seifert OC-4050EX-400V User Manual

Table of Content 4050870

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

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

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

4. Controller functions 4 .....................................................................................................................

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

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

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

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

9. Controller Layout Description 8 ....................................................................................................

10. Wiring diagram 9 ...........................................................................................................................

11. Taking into operation 11 ..............................................................................................................

12. Trouble shooting 11 ......................................................................................................................

13. Maintenance & Cleaning 11 .........................................................................................................

14. Transport & Storage 12 ................................................................................................................

15. Parts supplied 12 ..........................................................................................................................

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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.

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
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 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. Controller functions

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 -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 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.

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. Capillary pipe

6. Air intake, ambient side

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6. Technical data

Order Number 4050870
Cooling capacity L35L35 4.5 kW
Heating capacity 2000 W
Compressor Rotary piston compressor
Refrigerant / GWP R134a / 1430
Refrigerant charge 3625 g / 128 oz

High / low pressure

Temperature range -20°C - +40°C

Air volume flow (system / unimpeded)

Mounting External
Housing Material Mild steel, powder coated
Dimension HxWxD 1,900 x 900 x 620 mm
Weight 185 kg

Voltage / Frequency

Current L35L35 5.1 A
Starting current 31 A
Max. current 31 A
Nominal power L35L35 2,5 kW
Max. power 3,5 kW
Fuse 3 x 10 A (T)
Connection WAGO 9-pole connector, male

Ingress protection

Approvals CE, EX, RoHS

40 / 10 bar
580 / 150 psig

Ambient air circuit: 1770 / 4443 m³/h
Cabinet air circuit: 1770 / 2000 m³/h

380/415 V - 50 Hz 3~
400/460 V - 60 Hz 3~

Internal IP 20
Ambient IP 54

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7. Mounting

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.

This AC unit can only be mounted to a suitably Type rated enclosure to maintain it's Type rating. The Type and
IP rating of the enclosure should be the same or higher than that of the unit.

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1 Nut
2 Toothed washer
3 Flat washer
4 Enclosure
5 Mounting gasket top
6 M10 Lifting hook
7 PVC washer
8 Cooling unit
9 M8 Bolt
10 Mounting gasket bottom

8. Mounting Principle

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9. Controller Layout Description

FDP_PP Full display port and programming port
TB Test button
AC Alarm control
TC Temp Control
ETS External temp sensor
AO Alarm output

PS

FK Fans klixon
CC Compressor contactor
GC Ground connection
T Transformer
SDP Simple display port
DP Diagnose port

Power supply input and power distribution to a/c
fans

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10. Wiring diagram

CSB Current Sensor board
ABCR AMB Blower Current Relay
CBAB Relay AMB Blower
VTDM VIB/TRIP DISP module
ZB Zener Barrier
VS VIB Sensor
AB Ambient Blower
AZ ATEX ZONE 22
SZ SAFE ZONE
ITS Internal Temp Sensor (to H/E)
OPT Optional: For setup including heat exchanger
IB Internal Blowers
ITS Internal Temp. Sensor
ATS Ambient Temp. Sensor
PTS PP Temp. sensor
TB Test button
IH Internal Heater
Comms Communication (flat cable
DISP Display
VSAS Vibration Sensor – Alarm signal
CRABTS Current Relay – Ambient blower trip signal
VSABTS Vibration Sensor – Ambient blower trip signal
CBC Relay compressor
CCR Compressor current relay
SP Surge protector
C Compressor
#1 L1 L1 Live to H/E
#2 L2 L2 Live to H/E
#3 L3 L3 Live to H/E
#4 Earth
1 L1 Live
2 L2 Live
3 L3 Live

PE Earth

5 T1 Door contact (bridged with T2)
6 T2 Door contact (bridged with T1)

7 P1 Alarm contact
8 P2 Alarm contact
9 P3 Alarm contact

Normal
(switched on)

Alarm
(switched on)

Kabelfarbe

BK Black
BU Blue
BN Brown

GNYE Green/yellow

GY Grey
PK Pink
RD Red
VT Violet

WH White

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11. 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.
The unit / system must be protected with a MCB Type D or K.
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.

12. Trouble shooting

Failure Condition Cause Solution

Internal fan does not work Power not connected. Verify power supply

Unit
doesn't
cool

Unit
doesn't
cool

Enclosure
temperature
too hot

Excessive
condensate

Internal fan works, external fan
and compressor don't work

Internal fan works, external fan
and compressor don't work.
Display shows alternating OFF
and temperature

External and internal fan work,
compressor does not work

Compressor works, external fan
doesn't work

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

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

Enclosure door open

Enclosure door closed

Enclosure temperature is below
setting temperature (St)

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

The sequence of the phases
inside the power supply
connector is incorrect

Compressor motor electrical
failure

Capacitor for compressor failed Replace capacitor
External fan needs to be

replaced

Cooling unit undersized

Thermal compressor protector
triggered

Refrigerant leakage Contact dealer/service center

Ambient air gets into the
enclosure

Enclosure IP protection class
is below IP54

Damaged or misplaced sealing
strip

Verify values of parameter
"St"

Change phases inside power
supply connector

Have compressor replaced
by qualified service technician

Replace external fan

Enclosure needs a cooling
unit with with higher capacity

Verify if ambient temperature
is too high,clean condenser

Ensure door is closed, add
a door switch and connect
it to controller

Seal all openings of the
enclosure

Repair sealing strip
accordingly

13. 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 cooling unit contains R134a refrigerant and small quantities of lubricating oil. Replacement, repairs and
final disposal must be done according to the regulations of each country for these substances.

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14. 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
Relative humidity (at 25°C): max. 95 %

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 packing.
The unit must be shipped in the same position as it was mounted.
󰾬The unit must be protected by shock resistant padding (hard foam corner pieces, strips or cardboard
corner pieces).

15. Parts supplied

1 x Air Conditioner
1 x Instruction manual
1 x EC Declaration
1 x 9 - pole female connector
1 x Mounting gasket top
1 x Mounting gasket bottom
6 x Lifting hooks and washers
1 x Spare Nylon Mesh Filter (Ambient Inlet)

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

Albert - Einstein Str. 3 HF09/10 Wilerstrasse 16 75 Circuit Drive 105 Lewis Road
Hal-Far Industrial Estate North Kingstown Wantirna South
42477 Radevormwald Birzebbuga, BBG 3000 4563 Gerlafingen RI 0285 3152 Victoria
Deutschland Malta Switzerland USA Australia
Tel. [phone] Tel. [phone] Tel. [phone] Tel. [phone] Tel. [phone]
Fax [phone] Fax [phone] Fax [phone] Fax [phone] Fax. [phone]
[e-mail] [e-mail] [e-mail] [e-mail] [e-mail]

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