Danfoss R134a User Manual

Electrical data, connections and wiring
SY 240 – 300 – 380 &
SM/SZ 185 - P, X, Y versions
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 50.8 mm (UL 1"1/2 conduit) & Ø 43.7 mm (UL
1"1/4 conduit) & Ø 34.5 mm (UL 1" conduit)
• Ø 40.5 mm (ISO40) & Ø 32.2 mm (ISO32) & Ø
25.5 mm (ISO25)
• Ø 25.5 mm (ISO25)
The 4 others knockouts are as follows:
• Ø 22.5 mm (PG16) (UL 1/2") & Ø 16.5 mm
(ISO16) (x2)
• 20.7 mm (ISO20 or PG13.5) (x2)
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 6.3 mm size
Faston type.
The temperature inside the terminal box may not
exceed 70°C. 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 70°C.
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.
Terminal box
temperature
LNS1 S2 M1 M2
L1 L2 L3
Black Blue Brown
Phase sequence input
Internal control contact
Safety
circuit
Thermistor
connection
Module power
IP rating
Black
Blue
Brown
M1 - M2
Control circuit
Faston 1/4" tabs
Power supply
Sump heater
Module
power supply
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17AB237986441643en-010801
Application Guidelines

Danfoss R134a Specifications

General

Brand	Danfoss
Model	R134a
Category	Air Compressor
Language	English