Seifert SlimLine Pro KG 8520

Questions and Answers

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Adam WilliamsAug 9, 2025
What to do if my Seifert Accessories unit doesn't cool?
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  Kimberly TorresAug 10, 2025
  If your Seifert Accessories unit isn't cooling, first verify the power supply is properly connected. If the power is on, check if the enclosure temperature is below the set temperature (St1) and verify the 'St1' parameter values. Also, make sure the door switch is working correctly. If the controller is faulty, consider replacing it. An incorrect phase sequence inside the power supply connector can also cause this issue; try changing the phases. If none of these steps resolve the issue, it could be a compressor motor electrical failure, in which case you should have the compressor replaced by a qualified technician. A failed capacitor for the compressor or a faulty external fan can also be the cause, so consider replacing these components as well.
T
Travis WebbAug 15, 2025
Why is the enclosure temperature too high in my Seifert Accessories unit?
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  Brent SilvaAug 15, 2025
  If the enclosure temperature of your Seifert Accessories unit is too high, it could be due to several reasons. The cooling unit might be undersized, requiring a unit with higher capacity. Another possibility is that the thermal compressor protector has been triggered; verify if the ambient temperature is too high and clean the condenser. Refrigerant leakage could also be the cause, in which case you should contact your dealer or service center.
C
Christopher SmithAug 19, 2025
How to prevent excessive condensate in Seifert SlimLine Pro KG 8520 Accessories?
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  Austin Smith Jr.Aug 19, 2025
  Excessive condensate in your Seifert Accessories unit can occur if ambient air is entering the enclosure. Ensure the door is closed properly and consider adding a door switch connected to the controller. If the enclosure's IP protection class is below IP54, seal all openings. Also, check for any damaged or misplaced sealing strips and repair them as needed.
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ellisjanetAug 25, 2025
Why is my Seifert Accessories unit not cooling?
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  Trevor Rocha Jr.Aug 26, 2025
  If your Seifert Accessories unit isn't cooling, there are several potential causes. First, ensure the power is properly connected. If the enclosure temperature is below the set temperature (St1), verify the parameter "St1" values. Check that the door switch is working correctly and not open. If the controller isn't functioning, it may need replacement. An incorrect phase sequence inside the power supply connector can also be the culprit; try changing the phases. Other potential issues include electrical failure of the compressor motor (in which case, have it replaced by a qualified technician), a failed compressor capacitor (replace it), or a faulty external fan (replace the fan).
R
Raymond SmithAug 30, 2025
What to do if the enclosure temperature of Seifert Accessories is too high?
- R
  Richard GordonAug 30, 2025
  If the enclosure temperature of your Seifert Accessories is too high, it could be due to a cooling unit that is undersized; in this case, you'll need a cooling unit with a higher capacity. Another cause could be a triggered thermal compressor protector. If this is the case, verify if the ambient temperature is too high and clean the condenser. Finally, refrigerant leakage could be the issue, in which case you should contact your dealer or service center.
J
Jeff MacdonaldSep 3, 2025
How to fix excessive condensate in Seifert Accessories?
- A
  asmithSep 3, 2025
  Excessive condensate in your Seifert Accessories can stem from a few issues. It may be caused by ambient air entering the enclosure; ensure the door is closed and consider adding a door switch connected to the controller. Another cause might be that the enclosure's IP protection class is below IP54; seal all openings of the enclosure to address this. Also, inspect the sealing strip for damage or misplacement and repair it accordingly.

This document describes the Seifert cooling unit, model 852010001, designed for industrial enclosures.

Function Description

The Seifert cooling unit is a complementary accessory for larger industrial equipment, specifically designed to dissipate heat from electrical control cabinets and similar enclosures. Its primary purpose is to protect temperature-sensitive components within an industrial environment. It is not intended for household use.

The unit operates on a hermetically sealed refrigeration circuit, utilizing R134a refrigerant, which has an Ozone Destruction Potential (ODP) of 0 and a Global Warming Potential (GWP) of 1430. The circuit comprises four main components: a compressor, an evaporator, a condenser, and an expansion device. The compressor compresses the refrigerant, raising its pressure and temperature. This high-pressure, high-temperature refrigerant then flows through the condenser, where it is cooled by ambient air, transitioning from a gas to a liquid state. Subsequently, the liquid refrigerant passes through a capillary pipe, which reduces its pressure before it reaches the evaporator. In the evaporator, the refrigerant absorbs heat from the cabinet interior, changing back into a gas. This gas is then drawn back into the compressor, completing the cooling cycle.

A key feature of this unit is its two completely separate air circuits. This design ensures that the clean air inside the cabinet does not come into contact with the potentially dirty or polluted ambient air, maintaining the integrity of the enclosed components. The unit can function reliably in extreme ambient conditions, including dusty and oily air. Some models can also be ordered with an additional electrical cabinet heater.

The unit's controller displays the temperature in a range of -50°C to +150°C (-58°F to +302°F), with a resolution of tenths between -19.9°C and +99.9°C (-3.8°F to +211.8°F). During programming, the display shows parameter codes and values, along with icons indicating various operating events such as compressor relay active, alarm relay active, heater relay active, ambient blower relay active, heating mode, cooling mode, and test mode.

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 a door contact switch, the bridge must be removed, and the switch connected. The contact must be closed when the cabinet door is closed. The logic of the door switch can be changed via parameter c68 in the controller settings.

Important Technical Specifications

Order Number: 852010001
Cooling Capacity:
- 95F/95F: 6820 BTU
- 95F/122F: 5120 BTU
EER 95F95F: 2.1
Compressor: Rotary piston
Refrigerant / GWP: R134a / 1430
Refrigerant Charge: 410 g / 14.5 oz
High / Low Pressure: 29.5 / 6 bar (425 / 88 psi)
Operating Temperature Range: 10°C to 60°C (50°F to 140°F)
Air Volume Flow (system / unimpeded):
- Ambient air circuit: 400 / 706 cfm
- Cabinet air circuit: 294 / 500 cfm
Mounting: Wall mounted / recessed
Housing Material: Mild steel, powder coated
Dimensions (H x W x D): 53.2 x 15.6 x 8.3 inch
Weight: 106 lbs.
Voltage / Frequency: 120 V ~ 60 Hz
Current 95F95F: 8.3 A
Starting Current: 32 A
Max. Current: 14.8 A
Nominal Power 95F95F: 950 W
Max. Power: 1.75 kW
Fuse: 20 A (T)
Connection:
- 5 pole terminal for signals
- 4 pole terminal for power
Ingress Protection: Type 3, 3R, 12, 4
Approvals: CE, cURus, cULus

Usage Features

Temperature Set Point Adjustment: The cooling set point (St1) can be adjusted from a default of +35°C / +95°F. For units with an internal heater, the heating set point (St2) can be adjusted from a default of +5°C / +41°F.
Temperature Unit Selection: Users can select between Celsius (°C) and Fahrenheit (°F) for temperature display (parameter C18).
Alarm Thresholds: Low temperature alarm threshold (P25, default -10°C / +14°F) and high temperature alarm threshold (P26, default +55°C / +131°F) are configurable.
Door Contact Logic: The door contact NO/NC logic can be changed (c68), allowing flexibility in how the unit responds to the cabinet door being open or closed.
Test Functions: The unit includes test functions for compressor and ambient blower relays ("SET+▲") and alarm and heater relays ("SET+▼"), each running for 4 minutes.
Alarm Relay Operation: Both normally closed (NC) and normally open (NO) alarm contacts are provided. Under normal conditions, the NC contact is closed, and the NO contact is open. In an alarm condition or when the door contact is open, the NC contact opens, and the NO contact closes. A system power failure also triggers an alarm.
Condensate Management: The unit features integrated condensate evaporation to release condensate to the environment. For excessive condensate, an overflow trough drains it off. Regular checks of seals and considering a door contact switch (order no. 3100001) are recommended to prevent excessive condensate formation.
Mounting Flexibility: The unit can be wall-mounted or recessed. If recessed, the controller bracket can be adjusted outwards to match the wall thickness of the enclosure.
Cold Air Outlet Duct: The manual provides instructions for installing a cold air outlet duct, if desired.
Filter Installation: Instructions are provided for installing or replacing filters.

Maintenance Features

General Maintenance: The cooling unit is generally maintenance-free and can operate without filters in most environments.
Filter Cleaning/Replacement: In dusty environments, filter mats (accessories) are recommended and should be cleaned or replaced regularly. Oily or greasy filter mats should be replaced immediately. Aggressive cleaning materials, steam jets, or high-pressure cleaning should not be used on filter mats. Metal filters (accessories) are available for extremely oily environments and can be cleaned with standard cleaning agents and reused.
Functional Tests: Regular functional tests (approximately every 2,000 hours, depending on ambient pollution) are recommended.
Troubleshooting Guide: A comprehensive failure table is provided, listing conditions, causes, and solutions for common issues such as internal fan malfunction, compressor failure, high enclosure temperature, and excessive condensate.
Cleaning the Controller Panel: Only neutral detergents and water should be used for cleaning the controller panel; ethanol, hydrocarbons, ammonia, or their by-products are to be avoided.
Transport and Storage: The unit should be stored in locations with a temperature range of -40°F to 158°F and relative humidity of max. 95% (at 77°F). It should always be stored in its installation position. For return transport, the unit should be in its original packing or a packing case, strapped to a pallet, with at least 30 mm space between the unit and external packing, and protected by shock-resistant padding.
Disposal: The unit contains R134a refrigerant and small quantities of lubricating oil. Replacement, repairs, and final disposal must comply with the regulations of each country for these substances.
Spare Parts: A list of spare parts is provided, including kits for the compressor, ambient fan, internal fan, controller, connectors/strain relief, and installation parts. When ordering spare parts, the serial number of the cooling unit should always be stated. Only original spare parts should be used.