Seifert 850520S62 User manual

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Table of Content 850520S62
1. User manual 2 ..................................................................................................................................
2. Legal regulations 3 .........................................................................................................................
3. Safety instructions 4 ......................................................................................................................
4. Settings 5 .........................................................................................................................................
5. Functional principle 6 .....................................................................................................................
6. Technical data 7 ..............................................................................................................................
7. Performance graph 8 ......................................................................................................................
8. Mounting 9 .......................................................................................................................................
9. Mounting Principle 14 .....................................................................................................................
10. Cut Out Dimension 16 ...................................................................................................................
11. Dimension (H x W x D) 17 ............................................................................................................
12. Electrical Connection 18 ...............................................................................................................
13. Controller 19 ..................................................................................................................................
14. Wiring Diagram 20 ........................................................................................................................
15. Taking into Operation 20 .............................................................................................................
16. Trouble Shooting 21 .....................................................................................................................
17. Maintenance & Cleaning 21 .........................................................................................................
18. Transport & Storage 23 ................................................................................................................
19. Parts supplied / Spare parts / Accessories 24 ..........................................................................

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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.

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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:
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.

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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. 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.
Enclosure 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 (50°F) and +60°C (131°F). Units can be ordered with an
additional electrical cabinet heater. For the cooling capacities and environmental ratings please refer to the
type plate data.

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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, evaporator, condenser and expansion device.
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 arrives 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 6 Air intake ambient side
2 Radial fan cabinet side 7 Air intake ambient side
3 Evaporator 8 Condenser
4 Air outlet cabinet side 9 Air outlet ambient side
5 Compressor 10 Filter dryer
11 Expansion device

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6. Technical data
Order Number 850520S62
Cooling capacity L35L35 550 W @50 Hz
550 W @ 60 Hz
Cooling capacity L35L50 400 W @ 50 Hz
430 W @ 60 Hz
EER L35L35 1.41
Compressor type Rotary piston
Refrigerant / GWP R134a / 1430
Refrigerant charge 90 g / 3.17 oz
High / low Pressure 28 / 6 bar
406 / 88 psi
Operating Temperature Range 10°C - 60°C
UL temperature range 10°C - 55°C
Air flow volume (system / unimpeded) Ambient air circuit: 200 / 408 m³/h
Cabinet air circuit: 122 / 180 m³/h
Mounting Wall mounted / recessed
Housing Material Stainless steel AISI 304 (V2A)
Dimensions A x B x C (D+E) 370 x 520 x 185 (60+125) mm
Weight 20.5 kg
Voltage / Frequency 400/460 V - 50/60 Hz 2~
UL Voltage / Frequency 460 V / 60Hz 2~
Current L35L35 1.15 A @ 50 Hz
1.05 A @ 60 Hz
Starting current 3.0 A
Max. current 1.45 A
Nominal power L35L35 405 W @ 50 Hz
405 W @ 60 Hz
Max. power 560 W
Fuse 15 A (T)
Max circuit ampacity 15 A
Short-circuit current rating 5 kA
Rated current compressor 1 A
Full load current fans 0.15 A
Connection 4 pole terminal block for electrical connection
5 pole terminal block for signals
Ingress Protection IP 55 / Type 12
Approvals CE, cURus, cULus

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7. Performance graph

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8. 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.
Loosen (do not completely unscrew) the 4 screws on the lower part of the front cover. Remove the bottom
cover. Then proceed as shown. Once the aluminum filter is installed, reattach the cover.

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Applying supplied tight tape
For KG 8562 only:

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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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9. Mounting Principle
NOTES:
• Do not use within the first 15 minutes after installation!
• Use only the supplied mounting hardware.
• Tighten Screws to 4.5 Nm.
• Ensure the mounting surface does not warp after assembly and reinforce it if necessary.
1 M6 screws
2 M6 toothed washers
3 M6 flat washers
4 Enclosure
5 Mounting gasket
6 Lifting hook
7 Cover
8 M4 screws
Fig. 1 Recessed
Fig. 2 External

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10. Cut Out Dimension

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11. Dimension (H x W x D)

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12. Electrical Connection
Caution, risk of death
Unconnected and / or faulty protective conductor systems can lead to dangerous voltages and electric shocks
which can cause serious accidents.
Work on electrical connections may only be carried out by trained electrical engineers.
Door Switch
The unit can be switched ON and OFF 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.
Alarm Contacts
Alarm contacts rated according to:
EN60730-1 8(4)A N.O., 6(4)A N.C., 2(2)A N.O./ N.C. @ 250Vac 100000 cycles
UL 873 8A resistive 2FLA 12LRA, pilot duty C300 @ 250Vac 30000 cycles
These contacts are not suitable for fluorescent loads (neon lights, etc.) that use starters (ballasts) with phase
shifting capacitors. Fluorescent lamps with electronic controllers or without phase shifting capacitors can be
used, depending on the operating limits specified for each type of relay.
SCCR
Refer to UL508A Supplement SB and Seifert Systems’ document Short Circuit Current Rating (SCCR) on methods
how to modify the available short circuit current within a circuit in the panel.

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13. 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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14. Wiring Diagram
Power connector
1 L1
2 /
3 N
4 PE
Signal connector
1 Alarm (NC)
2 Alarm (NC)
3 /
4 Door contact
5 Door contact
15. 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. The cooling cycle will either stop once the air inside the
enclosure reaches the set temperature minus hysteresis or once the minimum On-time is reached. The setpoint
for the internal enclosure temperature is pre-set at 35°C.
The hysteresis is 3K, the minimum ON-time is 4 minutes, the minimum OFF-time is 3 minutes, for units with a
cooling capacity of more than 1 kW is it usually 7 minutes.