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(5)
LEV
Be careful on removing heavy parts.
Procedure
Photos
1. Remove the service panel. See (1)-1.2.3.4.
2. Replace the applicable LEV.
Important!
1
When performing the above procedure, be sure to
allow for enough service space in the ceiling area
for welding.
2
When conditions require, the unit can be lowered
from the ceiling before staring work.
(6)
Solenoid Valve Coil
Procedure
Photos & Illustrations
1. Remove the service panel. See (1)-1.2.3.4.
2. Disconnect the connector of the applicable
solenoid valve.
3. Remove the solenoid valve coil.
1
SVA, SVB, and SVM solenoid valve coils can
be serviced from the maintenance port. SVC
can serviced from the back if service space is
available in the back. To remove the back
panel, remove the two screws that secure it.
4. When the solenoid valve is defective, remove the
unit front panel, disassemble the solenoid valve
block, and check the interior of the valve.
When disassembly space or footing for disassem-
bly of the solenoid valve block in the vicinity of the
flow controller is not available, the unit can be
lowered from the ceiling to perform the work.
1
To view the interior of a valve, use a torque
wrench to open the screw cover of the mov-
able component compartment and the plunger.
2
When replacing the screw cover and plunger,
tighten them to the specified torque.
SVA screw cover: ........... 20 kg·m (2.0 N·m)
SVB screw cover: ........... 13 kg·m (1.3 N·m)
SVA, B, C plungers: ....... 6 kg·m (0.6 N·m)
Important!
1
You cannot check the valve interiors of SVC and
SVM.
2
Be sure to tighten screw covers and plungers to
specified torque values. Under-tightening can
cause gas leaks, over-tightening can cause
abnormal operation.
LEV1
LEV3
Pilot type
Direct drive type
Solenoid valve
