L
N S1 S2 M1 M2
L1 L2 L3
2
3
4
5
1
CC-0035
1
2
3
4
5
Phase sequence input
Internal control contact
Safety circuit
Thermistor connection
Module power
Electrical connections
Wiring connections
According to compressor model, electrical power is connected to the compressor terminals either by 4.8mm (10-32)
screws or by M5 studs and nuts. In both cases the maximum tightening torque is 3 Nm.
Cable gland or similar protection component must be used on electrical box's knockouts to against accidental
contact with electrical parts inside.
Terminal box temperature
The temperature inside the terminal box must not exceed 70°C (158°F). Consequently, if the compressor is installed
in an enclosure, precautions must be taken to avoid that the temperature around the compressor and in the
terminal box would rise too much. A ventilation installation on the enclosure panels may be necessary. If not, the
electronic protection module may not operate properly. Any compressor damage related to this will not be covered
by Danfoss warranty. In the same manner, cables must be selected in a way that ensures the terminal box
temperature does not exceed 70°C (158°F).
Motor protection module
The motor protection modules come preinstalled within the terminal box. Phase sequence protection connections
and thermistor connections are pre-wired and should not be removed.
The module must be connected to a power supply of the appropriate voltage. The module terminals are 6.3mm
(0.25inch) size Faston type.
Figure 16: Motor protection module
IP rating
The compressor terminal box according to IEC60529 is IP54 for all models when correctly sized IP54 rated cable
glands are used.
First numeral, level of protection against contact and foreign objects
5
- Dust protected
Second numeral, level of protection against water
4
- Protection against water splashing
Scroll compressors, CH290 and CH485 | Electrical connections
© Danfoss | Climate Solutions | 2022.09
AB236986442743en-000501 | 24