Inspection and maintenance
Greenstar Utility
ErP -
6 720 821 751 (2018/04)
35
7.3
Appliance maintenance
7.3.1
Secondary heat exchanger
Refer to figure 50.
▶ Remove the seven screws [1] securing the flue manifold access
cover [2].
Checking and cleaning of manifold flue outlet.
▶ Check:
– the inside of the outlet with an electric torch.
– the connection to the flue manifold assembly.
– the end of the flue through the horizontal or vertical fabric of the
property.
– clean the burner air inlet tube.
Flue system
▶ Ensure that the flue system is not blocked or restricted.
– Excessive flue gas system restriction or blockage will cause the air
pressure switch to lockout. This will need to be reset once the
restriction or blockage has been removed.
Cleaning the secondary heat exchanger.
▶ Remove the baffle retainer and baffles from the secondary heat
exchanger.
▶ Check and if required clean the secondary heat exchanger surfaces
with a plastic brush.
– Ensure the condensate drain point is clear.
– Ensure the dip tube [4] is clean and there is a gap between the
bottom of the dip tube [4] and the flue manifold.
▶ Refit the baffles and retainer [3], making sure the retainer is hooked
over the end baffle of both sides.
▶ Refit the manifold access cover once the cleaning (if required) and
baffles and retainer checks are complete.
Fig. 50
7.3.2
Replacing the flue manifold
To gain access to the flue manifold:
▶ Remove the manifold access cover
▶ Loosen the hose clip and detach the air duct
▶ Disconnect the electrical lead to the dip tube
▶ Remove the four bolts securing the manifold to the heat exchanger
▶ Discard the old seal fit the one supplied with the new manifold
Fig. 51 Cross section of flue manifold and heat exchanger
[1]
Manifold seal
[2]
Mating face of heat exchanger
[3]
Lower protruding edge of heat exchanger
[4]
Lower edge of flue manifold
[5]
Lip on upper edge of manifold
Fitting procedure
▶ Apply a thin film of grease to the seal [1] and the heat exchanger face
[2] to hold the seal in place during the fitting of the manifold
Fig. 52 Seal
NOTICE:
▶ Do not dismantle or move the dip tube [4].
CAUTION:
Damage to components!
Damage through use of wire brushes and cleaning
agents to clean heat exchanger components.
▶ Do not use wire brushes or cleaning agents to clean
the stainless steel heat exchanger components.
SLOTS
DOUBLE BAFFLES
SINGLE BAFFLES
32/50kW
25
12
1
50/70kW
31
15
1
Table 17 Secondary baffles
6720821751-09.1W
o
1
3
4
2
DANGER:
Risk to life
Escaping flue gas from an improperly fitted manifold
▶ Ensure the replacement manifold is correctly fitted,
Read all the instructiond before commencing work
Only remove and replace the flue manifold if damaged or
distorted
6720821751-57.1Wo
1
4
3
2
1
5
2
2
1
6720821751-52.1Wo