20
C6.2.15/0815/E
Figure 30: Correct electrical installation with cable glands for IP21 T-box for compressors ZPD34K* & ZPD42K*
4.2.2 Motor winding
The ZRD/ZPD Scroll compressors are offered with either a single-phase or a three-phase
induction motor, depending on the size. Single-phase motors need a run capacitor while all
three-phase motors are connected in star.
Figure 31: ZRD/ZPD motor schemes
The motor insulation material is class "B" (T
F
*) for the compressor models covered in these
guidelines. This is according to VDE 0530, IEC 34-18-1 or DIN 57530.
4.2.3 Motor protection
For all Copeland Scroll Digital compressors, conventional inherent internal line break motor
protection is provided.
4.2.4 Protection devices
Independently from the internal or external motor protection, fuses must be installed before the
compressor. Selection of fuses has to be carried out according to VDE 0635, DIN 57635
IEC 269-1 or EN 60-269-1.
4.2.5 Crankcase heaters
IMPORTANT
Oil dilution! Bearing malfunction!
Turn the crankcase heater on 12 hours
before starting the compressor.
A crankcase heater is required for systems containing more than 120% of the compressor
refrigerant charge limit listed in
Table 4
below. This includes long-line length systems where the
extra charge will increase the standard factory charge above the 120% limit. Experience has
shown that compressors may fill with liquid refrigerant under certain circumstances and system
configurations, notably after longer off cycles when the compressor has cooled. This may cause