32
Hoval STU Wood Pellet Boiler
Commissioning
It is essential that the following points are completed by the Heating Engineer before
commissioning is requested through Hoval.
•
System full of water and vented.
•
Boiler flue box drain pipework is fitted.
•
Heating load available e.g. pumps working.
•
Fuel supply sufficient.
•
Electrical connections made and correctly fused.
•
Correct boilerhouse ventilation.
•
Other manufacturer's equipment has been installed
& commissioned as necessary, e.g. pressurisation units.
Generally Hoval approved engineers will assemble the stoker and fuel feed system at site prior to com-
missioning.
However before the boiler and stoker can be fully commissioned it is essential that the following are com-
pleted by the installer to ensure the equipment can be set to work in an effective manner;
• System full of water and fully vented.
• Both boiler return connections are connected to a common inlet header
• Boiler flue box drain and drain trap pipe work fitted.
• Spiral turbulators fitted to all smoke box tubes.
• Sufficient heating load available to run boilers at full load for the commissioning period - typically
several hours.
• All electrical connections made and correctly fused.
• Boiler house is adequately vented.
• All other manufacturers equipment has been installed and commissioned (e.g. pressurisation units).
• An automatic air vent is fitted at high level on the flow pipework connected to the boiler.
• A suitable safety valve has been fitted directly onto the boiler together with associated discharge
pipework. No isolating valve should be fitted between the boiler and the safety valve.
• Sufficient mains cold water supply available for the safety thermal heating coils together with drain
pipework to local tundish.
• Sufficient wood pellet fuel in the bulk store for the duration of the commissioning period.
• Indicative analysis of the wood pellet fuel to be fired.
If the above are not completed and commissioning is unable to commence clients will be charged for the
abortive visit.
Hoval approved Service Engineers normally commission all new boilers and they will check the
following;
• The boiler and system is filled with water and vented, including circulation pumps.
• The boiler flue box and drain pipe work is fitted.
• Any independant pressurised system is operating correctly. Suppliers of the equipment should adjust
their equipment during commissioning.
• Provision of individual boiler pressure limiter device(s) for models STU 350 to 1000 (page 23 refers)
• Check that any dampers in the flue between the boiler and the chimney (if fitted) are in the open
position and locked open if manually operated and if electrically operated that the stoker is inter-
locked electrically to prevent operation until the damper is open.
If the above are not completed and commissioning is unable to commence,
clients will be charged for the abortive visit.
