Viessmann WB1A Series Installation And Service Instructions Manual page 59

Steps
(continued)
S
Start-up and Maintenance
ervice
S
Start-up and Maintenance
ervice
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20. Check gas pipes and fittings for leaks
WARNING
The gas supply piping must be leak
tested before placing the boiler in
operation.
21. Reinstall burner
Initial Start-up, Inspection and Maintenance
Ensure all joints of gas line are
pressure tight and that gas valves do
not leak when under normal
operating pressure (use approved
leak detection liquid).
1. Replace electrical cables from fan
motor
diagonally tighten 4 torque screws
(approx. 3 ft.lbs./4 Nm using a
calibrated torque wrench).
2. Insert new gasket and tighten the
fitting
pipe.
3. Insert air pressure switch connection
pipe
connector (P2 on the switch).
4. Replace electrical cables from gas
valve
unit
5. Open gas shutoff valve and switch
on power supply.
CAUTION
, mount burner, and
on the gas connection
onto the gas valve "OUT"
, and ignition transformer
.
59