Viessmann VITODENS 200-W WB2B Series Start-Up/Service Instructions page 23

Steps
(continued)
I S
nitial start-up ervice
I S
nitial start-up ervice
23. Check electrical connections
Ensure all plug-in connectors and strain
reliefs make positive contact and are
seated properly.
24. Check gas pipes and fittings for leaks
Initial Start-up and Service
Installation Instructions
Power/Pump Module
WARNING
The gas supply piping must be leak
tested before placing the boiler in
operation.
CAUTION
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).
23