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[8-15 Main-HBC Maintenance Instructions ]
8-15-3
LEV Coils (LEV1, LEV2, LEV3) Replacement Procedure (HBC)
Operation procedures
1) Remove the eight fixing screws from the
service panel (front lower).
2) Disconnect the corresponding LEV coil
connector from the control board.
3) Remove the control box and then re-
move the LEV coil wires secured by
clamps and cables ties.
Remove the cable ties holding other
wires.
4) Rotate the LEV coils slightly and then
remove them in the upward direction.
Remove the water-proof cover from the
coil of LEV3, and place it on the new
coil.
5) Install the new LEV coils in the position
indicated in the figure and then connect
the connector to the control board.
6) Hold the wires in place with the clamps
and the cable ties removed in step 3)
above.
Take care not to mix up the three LEV
coils when installing them.
Rotate the LEV coils until you hear them
snap into place to attach them properly.
8-15-4
Valve Motor and Valve Body Replacement Procedure (HBC)
Operation procedures
1) Perform the operation to drain the water
from the system if necessary in accor-
dance with the following.
When replacing only valve motor: Drain-
ing water from system not necessary.
When replacing valve body: Draining
water from system necessary.
2) Remove the two fixing screws from the
service panel (front upper) and then re-
move the service panel (front upper).
3) Perform the removal operation in accor-
dance with the following.
When replacing only valve motor: Re-
move the two fixing screw and then re-
move the valve motor.
When replacing valve body: Remove
the motor as described above and then
pull out the valve body in the direction of
the arrow indicated in the figure.
BS_08_L
Illustrations
LEV1 coil
Illustrations
Service panel
(front upper)
LEV3 coil
LEV2 coil
Valve body
Valve motor
Operation
location
Installation
location
Operation
location
Installation
location
139
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