Viessmann WB1A Series Installation And Service Instructions Manual page 54

Initial Start-up, Inspection and Maintenance
Steps
(continued)
S
Maintenance
ervice
54
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12. Remove burner (continued)
6. Disconnect electrical cables from gas
valve , and ignition transformer
unit .
7. Remove connection hose
pressure switch.
8. Loosen the fitting on the gas
connection pipe.
9. Loosen four Torx (T-30) screws
remove burner and disconnect all
electrical cables from blower motor
.
CAUTION
To avoid damage to the burner, do
not lay burner on its cylindrical
burner tube.
Failure to heed this caution may
cause damage to the burner tube,
which may lead to improper
operation.
from air
,