Integral T process thermostats
92 Maintenance YAWE 0026 / 21/01/2019
8.6 Maintenance of the refrigeration unit
8.6.1 Air-cooled condenser
The refrigeration unit is largely maintenance-free. If the equipment is operating in a dusty
atmosphere the condenser of the refrigeration unit has to be cleaned every 4 to 6 months or more
frequently. This can be done in a most suitable way by screwing off the ventilation grid, then
cleaning the condenser with a vacuum cleaner (using the brush top).
8.6.2 Water-cooled condenser
At regular intervals of one month or longer the dirt trap must be cleaned, depending on the degree
of soiling.
Unscrew the panel at the right side. Open the
filter housing with an open-ended wrench (AF 19
or AF 27). Clean the filter and insert it again into
the cooling water feed. Replace the panel.
Transport and storage:
Warning: if there is any danger of freezing (e.g. transport in winter) empty the condenser on
water-cooled units! Heat the bath to approx. 20 °C. Disconnect the water hose from the water tap.
Adjust the setpoint to e.g. 0 °C and, immediately after the compressor starts up, blow compressed
air into the water supply hose (from the back: on the left).
Place the drain hose as low as possible so that the unit can drain completely. Switch the unit off
again immediately.
8.6.3 Decalcifying the cooling water circuit
At regular intervals of 3 months or longer (depending on the water hardness / degree of
contamination of the cooling water) the water-cooled condenser must be decalcified or cleaned.
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