Section 11: Commissioning
Page 48
It is important that the following commissioning procedure is carried
out following installation to ensure safe and efficient operation of the
boiler.
11.1 Equipment Required
To carry out a complete and comprehensive commissioning of the
Grant Vecta wood pellet boiler the following equipment is required:
•
Electronic draught meter.
•
Flue gas analyser (with ‘wood pellet’ fuel setting).
11.2 Preliminary inspection
Before switching on the power supply to the boiler, the following must
be checked:
11.2.1 Heating System
Check the following:
•
That corrosion inhibitor and, where necessary antifreeze, is
present in the system water. Refer to Section 4.7.
•
That a magnetic in-line filter has been fitted in the system return.
Refer to Section 4.7.
•
Both the boiler and heating system is filled and vented.
•
On sealed systems the expansion vessel charge pressure is
correct and system is filled to correct pressure.
•
For any leaks at joints, fittings, etc.
11.2.2 Electrical Connections
Check the following:
•
The electrical connections to the boiler are correct. Refer to
Figure 8-7.
11.2.3 Wash-down System
Check the following:
•
The inlet to the wash-down system (located at the bottom rear
corner of the left side panel) is connected to an uninterrupted
mains water supply.
•
All valves in this water supply are open.
11.2.4 Condensate Disposal System
Check the following:
•
The condensate trap (supplied with the boiler) and condensate
disposal pipework has been fitted correctly. Refer to Section 5.
•
If a condensate pump is fitted, that a condensate holding tank
of at least 40 litres capacity has also been installed. Refer to
Section 5.
11.2.5 Flue System
Check the following:
•
The correct flue system has been used. Only the Grant ‘Biomass’
flue system should be used.
•
The flue system is correctly connected to the boiler flue outlet.
Refer to Section 7.4.
•
The boiler combustion air inlet along the bottom of the front door
is clear and unobstructed.
•
The flue system conforms to the relevant requirements of
The Building Regulations Approved Document J for solid fuel
appliances.
11 Commissioning
11.2.6 Combustion Ventilation
Check that the combustion air inlet to the boiler along the lower front
edge of the boiler front door is unobstructed. If necessary remove any
obstructions, e.g. leaves, etc.
Check that the combustion air inlet to the burner, located in the font of
the boiler, is unobstructed. Refer to Figure 11-1.
Figure 11-1:
Air inlet
11.3 Boiler
11.3.1 Control thermistor and Overheat thermostat
•
Isolate the electrical supply to the boiler.
•
Open the hinged hopper lid on the boiler.
•
Undo the two screws (one on each side) and remove the access
cover from the top of the boiler. Refer to Figure 11-2.
Figure 11-2:
Removing the access cover
•
Remove the pellet hopper grille. Pull up the front edge. Lift the
grille off the three tabs in the slots along at the rear edge, and
remove it from the boiler.
•
Ensure that the boiler pellet hopper is empty of pellets. If not
remove all pellets before proceeding any further.
•
The pocket, containing both the boiler control thermistor sensor
and overheat thermostat bulb, is located in the upper left front
of the boiler, to the left of the heat exchanger housing. Refer to
Figure 11-3.
Boiler air inlet
