User Manual for Seifert 42701001 Control Cabinet Air Conditioner

Quick guide from the manual

The Seifert 42701001 is a cooling unit designed exclusively for dissipating heat from stationary industrial control cabinets. It is not intended for household use. Key operational requirements include ensuring the unit is mounted horizontally, the cabinet is sealed to IP54 standards, and the unit is allowed to stand for at least 30 minutes after mounting before being powered on to allow compressor lubrication.

Safety Instructions

Warning: Only qualified personnel are permitted to install, maintain, or clean the unit. Ensure the cabinet is disconnected from the electrical supply and protected against unauthorized reconnection before starting any work. Dangerous voltages (above 50V AC or 100V DC) are present behind cabinet doors and on the power supply.

Functional Principle

The unit operates on a refrigeration circuit consisting of a compressor, evaporator, condenser, and expansion device. It uses R134a refrigerant to dissipate heat from the cabinet interior to the ambient air, maintaining a set internal temperature.

Mounting and Installation

Before mounting, ensure the cabinet location allows for sufficient air circulation. Use the provided mounting template to drill holes and cut apertures. The unit must be mounted horizontally (max deviation 3 degrees). Ensure a good seal exists between the unit and the cabinet to maintain IP54 protection. Secure the unit using the supplied M6 hex head screws, washers, and locking washers.

Condensate Management

The condensation drain is located at the base of the unit. To install the oil and cleaning drain pipe: remove the plastic stopper from the base, keep the silicon washer, insert the drain connector, and lock it clockwise.

Electrical Connection

Mains connection is made via the terminal block. Ensure correct polarity is maintained and fans rotate clockwise. Terminals T1 and T2 are for a door contact switch (must be bridged if not used). Terminals P1, P2, and P3 are for fault warnings; the alarm temperature is factory-preset at 50°C. To adjust the alarm setting, remove the outer cover and PCB cover, then use a screwdriver to turn the alarm temperature potentiometer on the PC-board.

Taking into Operation

After mounting, wait at least 30 minutes before powering on. The unit is controlled based on the cabinet internal temperature, which can be adjusted via the potentiometer on the PC-board (range 20°C to 50°C). A start-up delay of 4-7 minutes occurs during the first operation.

Maintenance and Cleaning

Units are virtually maintenance-free. Regularly check the condenser profile for dirt (approx. every 2,000 hours). If cleaning is required, disconnect from the mains and blow out with compressed air. For wet cleaning, the unit must be removed from the cabinet. Never use aggressive cleaning fluids. After cleaning, allow a two-hour delay before restarting.

Troubleshooting

If the unit does not start, check the power supply, door contact, or temperature set point. If it does not cool, check the compressor, evaporator/condenser cleanliness, or refrigerant levels. If the evaporator is iced up, check the cabinet seal and ambient temperature. If there is excessive condensate, ensure the cabinet door is closed and the gasket is intact.

Technical Data

The unit operates at 120V (50/60 Hz) with a cooling capacity of 600W (L35L35). It features an IP54 ingress protection rating and an operating temperature range of +10°C to +50°C.

Transport and Storage

Store in locations with temperatures between -40°C and +70°C and a maximum relative humidity of 95% at 25°C. When returning the unit, use original packaging or ensure at least 30mm of space between the unit and external packing, protected by shock-resistant padding.