Installation
Greenstar Danesmoor Utility
2022+
and Utility System
2022+
- 6 721 846 263 (2022/01)30
5.4.1 Flue damper installation
Insert the flue damper into the inner tube of the straight extension or 90°
elbow and fit the flue as shown in figure 40. Ensure that the rubber seal
is fitted into the inner tube.
Fig. 40 Flue damper fitting
5.4.2 Installation notes
▶ If using an extension or horizontal terminal onto the boiler outlet,
remove the flue elbow retaining bracket [6].
▶ When connecting a flue elbow [8] directly to the boiler flue outlet,
loosen the flue elbow retaining bracket screws [7] before fitting the
flue elbow. Insert the flue elbow with the flue retaining clamp [9]
loosely fitted, then tighten the bracket screws [7].
▶ Orient the flue elbow into the required position and secure with the
clamp.
▶ Ensure all flue seals are in good condition and seated properly.
▶ To ease assembly of flue components, grease seals lightly with the
solvent-free grease supplied.
▶ A clamp should be installed for every 1m and at every change of
direction.
Fig. 41
▶ All horizontal flue sections must rise by at least 52mm for each metre
(3°) away from the boiler to ensure that condensate flows back into
the boiler for safe discharge via the condensate waste pipe.
▶ The horizontal terminal must be installed at 3° to ensure that the
condensate drains back to the boiler whilst also preventing rain
ingress down the air duct.
NOTICE: Fitting the flue damper
Failure to fit the flue damper, when required will effect
the performance of the boiler and may cause “Lockouts”
The flue damper is only fitted to models stated in the
table below
Model range Output (kW) Flue damper fitted
12/18 13 Yes
15 Yes
18 Yes
18/25 18 Yes
21,5 Yes
25 Yes
25/32 25 No
28 No
32 Yes 4m flue length
32 No > 4m flue length
Table 9
WARNING: Escaping flue gases
The flue elbow and clamp may become loose.
▶ The flue elbow retaining bracket [6] must be fitted if
a flue elbow is used on the boiler outlet.
The boiler is not designed to take the weight of the flue
system, this must be supported externally to the boiler.
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