User Guide

Application guidelines
17AB237986441643en-US0701
The motor protection module comes preinstalled
within the terminal box. Phase sequence
protection connections and thermistor
connections are pre-wired. The module must be
connected to a power supply of the appropriate
voltage. The module terminals are 0.25" size
Faston type.
SY 240 – 300 – 380 &
SM/SZ 185 - P, X, Y versions
The compressor terminal box according to IEC529 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.
IP rating
The terminal box is provided with 2 triple
knockouts and 1 single knockout for power
supply and 4 double knockouts for the safety
control circuit.
The 3 power supply knockouts accommodate the
following diameters:
• Ø 2 inch (UL 1"1/2 conduit) & Ø 1.72 inch (UL
1"1/4 conduit) & Ø 1.36 inch (UL 1" conduit)
• Ø 1.59 inch (ISO40) & Ø 1.27 inch (ISO32) & Ø 1
inch (ISO25)
• Ø 1 inch (ISO25)
The 4 others knockouts are as follows:
• Ø 0.89 inch (PG16) (UL 1/2") & Ø 0.65 inch
(ISO16) (x2)
• 0.81 inch (ISO20 or PG13.5) (x2)
Black
Blue
Brown
M1 - M2
Control circuit
Faston 1/4" tabs
Power supply
Sump heater
Module
power supply
}
}
LNS1 S2 M1 M2
L1 L2 L3
Black Blue Brown
Phase sequence input
Internal control contact
Safety
circuit
Thermistor
connection
Module power
The temperature inside the terminal box may not
exceed 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. The installation of ventilation 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
to insure that terminal box temperature does not
exceed 158°F.
Terminal box temperature
Electrical data, connections and wiring