Danfoss HG7 User manual

AX450533577373en-000201
HG88e
HG7
Repair instruction electric motor
Service guide

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Contents
1 Liability and Warranty......................................................................................................................2
2 Additional Safety Information............................................................................................................2
3 Disassembly .......................................................................................................................................4
4 Assembly ............................................................................................................................................8
1 Liability and Warranty
Liability and the manufacturer‘s warranty are excluded if
• Alterations and functional modications have been carried out,
• no original replacement parts have been used.
2 Safety Information
Target group for this repair information
¾Work on the compressor may only be carried out by persons whose technical training, skills and
experience along with their knowledge of pertinent regulations and documentation means that they
are capable of assessing the work to be carried out and detecting any possible dangers.
¾A specialist can mean a refrigeration technician for example. Note that electrical work may only be
carried our by a qualied electrician. Alternatively, on a country-specic basis, persons who have
undergone electrotechnical instruction and who have proof of their qualication are also permitted
to carry out the work.
• DANGER! This symbol refers to instructions for avoiding direct severe
dangers to persons or plant by electrical current.
• DANGER! This symbol refers to instructions for avoiding direct severe dangers
to persons.
• WARNING! This symbol is used to indicate that inaccurate compliance or
total failure to comply with the instructions could cause injury to persons or
damage to the compressor or refrigerating machine.
• This symbol is used to indicate that parts with refrigeration oils (for oil types see
compressor name plate) should be moistened prior to installing.
• This symbol indicates the permitted tightening torque for the screw.
60 Nm

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Safety Information
Important prerequisites
DANGER
Risk of electric shock.
XBefore you carry out any repair work, disconnect the compressor from the electricity network.
XTurn the main switch to „O“ (OFF).
XSecure the main switch against an unauthorised restart.
WARNING
The heavy weight of the compressor can be potentially dangerous.
Use all the seals included in the kit.

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Disassembly
3 Disassembly
WARNING
Ensure that the compressor is depressurised before starting work.
3.1 Draining the oil
NOTE
Do not dispose of oil in domestic waste.
XDispose of the old oil in accordance with the environmental regulations and observe national regulations

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Disassembly
3.2 Disconnecting the electrical connections
XDo not damage any cables and components.
Damaged parts must be repaired or replaced immediately.
HG7/HGZ7
¾Remove the terminal box (4 hexagon head screws M6,
AF10).
¾Remove the terminal board (10 hexagon head screws
M10x35, AF17).
¾Remove the electrical lines from the underside of the
terminal board.
¾Remove the terminal box (4 hexagon head screws M8,
AF13).
¾Remove the socket head screws (10x M10x20, AF8) from
the terminal board.
¾The terminal board must be pushed off the compressor
housing.
To do so, completely remove the nuts (M6, AF10 and M8,
AF13) from the threaded pins of the earthing connector.
Now rotate the threaded pins (socket head AF3 and AF4)
further in order to push the terminal board out of the
compressor housing. The silicon bonded joint is dest-
royed in the process!
¾Remove the electrical lines from the underside of the
terminal board.
HG8/HG88e

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3.3 Remove housing cover
WARNING
The heavy weight of the compressor and parts can potentially be dangerous; risk of falling,
danger of crushing.
XATTENTION! The residual oil ows out when the case cover is removed.
Lay an absorbent material under the area and dispose of it in accordance with the environmental regulations.
Disassembly

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3.4 Removing the stator
WARNING
The heavy weight of the stator can potentially be dangerous; risk of falling, danger of crushing.
XUse a suitable hoist for the removal.
XTake the measures required to safely remove the stator by placing a square of the correct height at the
open end of the motor housing. Prevent inadvertent rolling of the removed stator.
¾Carefully pull the stator out of the compressor housing and pay attention to the cable!
¾Remove the feather key from the compressor housing.
¾Remove both stator screws (M8x20). ¾Remove both stator screws (M8x10, M8x20).
HG7/HGZ7 HG8/HG88e
max.
75kg
Disassembly

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Assembly
4 Assembly
We recommend cleaning the inside of the case before the installation.
There must not be any particles and dirt in the compressor.
To assemble, reverse the order of the steps. Note any particular features such as observance of different torques.
4.1 Connecting the stator to the motor housing
WARNING
The heavy weight of the stator can potentially be dangerous; risk of falling, danger of crushing.
XUse a suitable hoist for the removal.
XNote the direction of the feather key — stator.
You must align the parts in order to install them.
HG7/HG8/HG88e
XDo not damage any cables and components. Push the stator with the cables leading into the motor housing as far
as it will go. At the same time, carefully pull the cables upwards through the terminal board opening.
¾Align the stator so that the feather key can be pushed in the the groove ush with the housing surface.
max.
75kg

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Assembly
HGZ7/1620+1860
XDo not damage any cables or component parts. Push the stator with the cables leading into the motor housing to a
depth of 13.5 mm. At the same time, carefully pull the cables upwards through the terminal board opening.
¾Align the stator such that the feather key can be pushed in the the groove on the motor housing ush with the stator.
¾Fix the feather key and stator in this position using the new stator screws, as described on page 10.
max.
75kg
13,5 mm
Motor housing
Feather key
Stator

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¾Screw in the new stator screws. The hardening time of the thread coating is 6 hours. The stator screw must
only be used once.
HG8/HG88e
AA
BB
A - A
B - B
Threaded pin presses
on stator assembly
Threaded pin presses
on feather key
C - C
C C
10 Nm 10 Nm
HG7/HGZ7
Assembly

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4.2 Assembling the terminal board
HG8/HG88e
¾Connect the electrical connections as per the illustration on page 12.
¾Slightly oil the new seal. ¾Carefully remove the residual silicone from the terminal
board without damaging the sealing surface!
NOTE HG7/HGZ7
XAt voltages below 400 V (special voltage), an intermediate plate, part no. 06908, including intermediate
seal and longer screws, must be installed.
60 Nm
HG7/HGZ7
Assembly
60 Nm

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Terminal assignment on the terminal board HG7 and
HGZ7
Standard part winding
Connections for
PTC sensors
1U1 1V1 1W1
2U1 2V1 2W1
3
2
1
7
8
9
Part winding 1
Part winding 2
Terminal assignment on the terminal board HG8 and
HG88e
Standard part winding
Connections for
PTC sensors
1
2
3
7
8
9
3
2
1
7
8
9
Part winding 1
Part winding 2
Terminal assignment on the terminal board HG7 and
HGZ7
Star delta
Connections for
PTC sensors
U1 V1 W1
W2 U2 V2
W
V
U
Z
X
Y
Cable harness 1
Cable harness 2
Terminal assignment on the terminal board HG8 and
HG88e
Star delta
Connections for
PTC sensors
U
V
W
Y
Z
X
W
V
U
Y
Z
X
Cable harness 1
Cable harness 2
4.3 Connecting the electrical connections on the terminal board
WARNING
Make sure that you use the correct connection on the cable harnesses!
NOTE
XThe drawings show the underside of the terminal board.
Assembly

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4.4 Assembling the housing cover
XSlightly oil the new O-ring.
¾Install the case cover with the O-ring. Ensure the O-ring is correctly seated!
Assembly
60 Nm

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4.5 Assembling
¾Fit the terminal box with the seal.
DANGER
Carry out the additional work steps such as „lling the oil“ etc. as per the assembly instruction.
See the assembly instruction, in particular the „Start-up“ chapter.
HG7/HGZ7 HG8/HG88e
Assembly
34 Nm
15 Nm

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Dear customer,
If you have any questions about installation,operation and accessories, please contact our technical service or your refrigerating
system wholesaler or our representative.
Service

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