Crankcase Heaters - Emerson Copeland Discus Series Application Manuallines

4.8.4 Crankcase heaters

IMPORTANT
Oil dilution! Bearing malfunction! Turn the crankcase heater on 12 hours
before starting the compressor.
A crankcase heater is used to prevent refrigerant from migrating into the shell during standstill
periods.
27-Watt heater element for K compressors

The internal crankcase heater for K compressors is a self-regulating 27-Watt PTC heater
(see Fig. 22).
70-Watt and 100-Watt heater element

The 70-Watt heater for L, 2D and D2 compressors is screwed into a pocket.

Heaters for D3, 3D, D4 and D6 compressors are screwed into a sleeve (see Fig. 22).
Figure 22: Crankcase heater 27W, 70W and 100W
200 Watt heater element

In compressors that are equipped with a deep oil sump the heater element is inserted into a
special chamber and fixed to the compressor body.
Figure 23: Crankcase heater 200W
22
1. Magnetic plug
2. Securing piece
3. Heater element 200W
4. Deep oil sump
D6.3.4/0715-0716/E