Seifert OC 5710-230V, oc 5708-120v, OC 5731-400V, OC 5709-230V User Manual

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Table of Content OC 5710-230V

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

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

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

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

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

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

7. Performance Graph 7 .......................................................................................................

8. Mounting 8 .........................................................................................................................

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

10. Cut out dimensions 9 .....................................................................................................

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

12. Electrical connection 11 .................................................................................................

13. Wiring diagram 11 ..........................................................................................................

14. Taking into operation 13 ...............................................................................................

15. Repair 13 .........................................................................................................................

16. Maintenance & Cleaning 14 ..........................................................................................

17. Transport & Storage 14 .................................................................................................

18. Parts supplied 15 ............................................................................................................

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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 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.

●

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. 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.

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. For units equipped with an internal heater the heating set point
(parameter St2) is pre-set at 5°C and can be adjusted between -20°C and +19°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 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 Warning 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. Capillary pipe

6. Air intake, ambient side

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6. Technical data

Order Number 571000001
Cooling capacity L35L35 1.00 kW @ 50 Hz

1.08 kW @ 60 Hz

Cooling capacity L35L50 660 W @ 50 Hz

720 W @ 60 Hz

Heating capacity 1,000 W (optional)
Compressor Reciprocating compressor
Refrigerant / GWP R134a / 1430
Refrigerant charge 280 g / 10 oz
High / low pressure 30.5 / 6 bar

445 / 88 psig

Temperature range -20°C - +55°C
Air volume flow Ambient air circuit: 320 m³/h

Cabinet air circuit: 375 m³/h

Mounting External
Material housing Mild steel, powder coated
Dimension HxWxD 900 x 304 x 270 mm
Weight 38 kg
Voltage / Frequency 230 V ~ 50/60 Hz
Current L35L35 3.2 A
Starting current 15 A
Max. current 4.7 A
Nominal power L35L35 550 W @ 50 Hz

640 W @ 60 Hz

Max. power 700 W
Fuse 6 A (T)
Connection Connection terminal block

.
IP 56 (TYPE 12, 3, 3R, 4)

CE, cURus, RoHS

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7. Performance Graph

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8. Mounting

Always disconnect the power supply before opening the unit.

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.

9. Mounting Principle

1 M6 bolts
2 M6 toothed washers
3 M6 Flat washers
4 Enclosure
5 Mounting gasket
6 Cooling unit

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10. Cut out dimensions

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11. Dimensions (H x W x D)

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12. 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.

13. Wiring diagram

Mc Compressor
Ma Ambient fan
Mi Internal fan
Cc Compressor capacitor
Ca Ambient fan capacitor
Ci Internal fan capacitor
TS Temperature sensor
CE Condensate Evaporator
CH Compressor heater
C Controller
X4 Electrical Supply Connections
230V 1: L1 230V, 3:N
120V 1: L1 120V, 3:N
460V 1: L1 460V, 3:L2 460V
400V 2: LX 400V, 3:L2 400V
4 PE Earth
6,7 P1 / P2 Alarm contacts
8,9 T1 / T2 Door contacts
Notes:
#1 Ci used only in OC 5710/ 15/ 20
#2 Mi1 used only in OC 5705/ 08/ 09

#3

X1 used for 230V units
X2 used for 120/ 400 - 460V 2~ units

#4 Ma1 + Ca1 for OC 5741 only

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14. 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.

15. Repair

Failure Condition Cause Solution

Unit does
not 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 does
not cool

External and internal
fan work,
compressor does not
work

Compressor
motor electrical failure

Verify external fan,
verify ambient temperature,
clean
condenser

Capacitor for
compressor
failed

Replace capacitor

Compressor works,
external fan doesn't
work

External fan needs to be
replaced

Replace external fan

Enclosure
over
heating

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

Unit cooling undersized Enclosure needs a bigger

cooling unit

Enclosure needs a
bigger
cooling unit

Thermal compressor
protector triggered

Verify ambient
temperature,
clean condenser

Refrigerant leakage Contact dealer/service

center

Excessive
condensate

Door enclosure open

Ambient air gets into
the enclosure

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

Door enclosure
closed

Enclosure IP degree
minimum IP54

Seal openings on enclosure

Damaged misplaced
sealing strip

Repair strip accordingly

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16. Maintenance & Cleaning

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

Any repairs that may need doing must only be done by specialist qualified personnel. The cooling unit
is the low maintenance type and for most of the environments no filter is required. If an air filter is
installed, check it and, when clogged, clean or replace.

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.

17. 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).

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18. Parts supplied

1 x Cooling unit with individual packaging
1 x Plastic bag containing:

- Instruction manual with technical information

- CE Conformity Declaration

- Drilling template in 1:1 scale, including general information about the unit
1 x Installation pack containing:
8 x M6 Bolts
8 x A6.4 Toothed Washers
8 x A6.4 Washers
1 x Female connector with shorted wired positions for 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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