Electrical data, connections and wiring
Danfoss Heat Pump scroll compressors are available in 2 different motor voltages.
Motor voltage
Danfoss Heat Pump scroll compressors will only
compress gas while rotating counter-clockwise
(when viewed from the compressor top). Since
single-phase motors will start and run in only
one direction, reverse rotation is not a major
consideration. Three-phase motors, however,
will start and run in either direction, depending
on the phase angles of the supplied power. Care
must be taken during installation to ensure that
the compressor operates in the correct direction
(see “Phase sequence and reverse rotation
protection”).
The drawings below show electrical terminal
labelling and should be used as a reference
when wiring the compressor. For three phase
applications, the terminals are labelled T1, T2, and
T3. For single-phase applications the terminals
are labelled C (common), S (start), and R (run).
Prior to energizing, verify that leads and terminal
connectors are in proper working condition.
Warning: For safety reasons, make voltage
measurements at the unit contactor, not at
compressor terminals. Always keep the terminal
cover in place when the compressor is energized.
The terminal cover and gasket should be installed
prior to operation of the compressor. The terminal
cover has two outside tabs, 180 degrees apart,
that engage the terminal fence. When installing
the cover, check that it is not pinching the lead
wires. Both the inside of the terminal cover and
the gasket have labels for the terminal pins: C
(common), R (run), and S (start).
Wiring connections
Terminal cover mounting
Terminal cover removal
Quick connect spade terminals
P terminal box type
push
push
push
Motor voltage code 4
Motor voltage code 5
Nominal voltage 50 Hz
380-400V-3-50 Hz
220-240V-1-50 Hz
Voltage range 50 Hz
340 - 440
198 - 264
Ring connect screw terminals
C terminal box type
C
T₁
S
T₂
R
T₃
12
FRCC.PC.017.A2.02
Application Guidelines
