37
Grant Vortex Oil Boilers
8 - BOILER SERVICING
Dismantling prior to servicing
8.2
Cleaning the boiler
8.3
1 Open the door (Kitchen models) or pull off the
front panel (Utility models).
2 On System models, carefully lift up and remove the
expansion vessel from the front of the boiler.
Place the vessel on the floor taking care not to
strain the flexible pipe.
3 Disconnect the flexible air tube from the burner.
4 Remove the burner fixing nut (top of mounting
flange) and withdraw the burner.
If required, disconnect the flexible oil pipe(s), use
a suitable container to prevent any oil spillage.
Note: If two flexible pipes are connected to the
burner, identify (mark if necessary) which is the
inlet and return if they are to be disconnected.
1 Remove the nuts and washers securing the front
cleaning door and withdraw the door. Take care - it
is heavy.
2 Remove the baffles as shown in Fig. 24, 25 or 26.
3 Remove all deposits from the baffle plates and all
the boiler internal surfaces using a stiff brush and
scraper if necessary.
4 Check the condition of the flue, clean as necessary.
5 Check the condition of the front cleaning door seal,
replace if necessary.
6 Replace the baffles, ensuring they are correctly
fitted. See Fig. 24, 25 or 26.
7 Pull out the spiral turbulators from the heat
exchanger tubes. See Fig. 26.
Clean the turbulators using a stiff brush
Test the heat exchanger condensate drain by pouring
water into one of the lower tubes and observe whether
the water discharges from the 22 mm condensate
outlet. Replace the turbulators.
8 Replace the front cleaning door, ensuring the seal
is in good condition and secure it in position with
the nuts and washers previously removed. Tighten
to form a seal.
9 Remove the condensate trap and check that it is not
blocked and is operating correctly, i.e. the float is
free to move. Clean the trap and float as required.
10 Check that the boiler condensate outlet is
unobstructed. Clean if necessary.
IMPORTANT: The condensate trap and condensate
outlet must be checked on every service and cleaned as
necessary.
Fig. 24 - 15/26 baffles
Fig. 25 - 26/36 and 36/46 baffles
Right
baffles
Left
baffles
Top set
Bottom set
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