Electrical Protection (Fuses); Crankcase Heater - Emerson Copeland 4MTL-05 Series Application Manuallines

4.4

Electrical protection (fuses)

Independently from the internal motor protection, fuses must be installed before the compressor. The
selection of fuses has to be made according to VDE 0635, DIN 57635, IEC 269-1 or EN 60-269-1.
4.5

Crankcase heater

IMPORTANT
Oil dilution! Bearing malfunction! Turn the crankcase heater on 12 hours
bef ore starting the compressor.
A crankcase heater is used to prevent ref rigerant f rom migrating into the compressor shell during
standstill periods. It is always required for Stream 4MTL* and 4MSL* compressors.
4MTL* and 4MSL* compressors use a 100-Watt crankcase heater available in 115 or 230 V. The
crankcase heater is delivered as a kit together with the compressor. This "easy-to-install" kit consists
of 3 parts:
▪ 1 crankcase heater;
▪ 1 heat-conductive paste tube;
▪ 1 mounting ring.
The operation of 115 V and 230 V crankcase heaters can be controlled by the Copeland compressor
electronics module.
Figure 38: 100-Watt crankcase heater element
The crankcase heater has to be inserted in a special chamber.
Assembly instructions
Insert the mounting ring along the heating part
until it blocks.
30
Figure 39: Crankcase heater kit
Spread a thick layer of conductive paste around
the heating part.
AGL_Stream_ST_4MTL_4MSL_EN_Rev02