Application Guidelines
9
AB141686422149en-US0401
Electrical data, connections and wiring
Terminal cover mounting
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.
Terminal cover removal
Internal motor protection
Phase sequence and reverse
rotation protection
IP rating
Wiring connections
VRJ scroll compressors are not equipped with
an internal motor protector. Motor protection
is provided by the variable speed drive. All
motor para-meters are factory preset in order to
guaranty optimal locked rotor or overload current
protection.
The compressor will only operate properly in a
single direction. If electrical connections are done
correctly between the drive and the compressor
terminals (compressor and drive terminals T1, T2
and T3 matching), the drive will provide correct
phase supply to the compressor, and reverse
rotation will be not possible.
If compressor and drive T1, T2 and T3 terminals are
not matching, the compressor can go in reverse
rotation. This results in excessive noise, no pressure
differential between suction and discharge, and
suction line warming rather than immediate
cooling. The compressor can be rapidly severely
damaged in these conditions.
The compressor terminal box IP rating according to CEI 529 is
IP22
for all models. This IP rating is only
valid when correctly sized cable glands with the same IP rating are applied.
•
First numeral, level of protection against contact and foreign objects
2
protection against object size over 1/2 inch (fingers of similar)
•
Second numeral, level of protection against water
2
protection against dripping water when tilted up to 15°
VRJ scroll compressors will only compress gas
while rotating counter-clockwise (when viewed
from the compressor top).
The drawing shows electrical terminal labelling
and should be used as a reference when wiring the
compressor.
T1, T2 and T3 of the drive and the compressor
must be connected accordingly.
Refer to “Danfoss VRJ Installation and Operation
instructions” for details and cable sizes.
Quick connect spade terminals
P terminal box type
push
push
push
Содержание VRJ
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