If Z is greater than 725mm then two extension duct assemblies will
be required, the first assembly being cut to length as plain tubes.
If more than two extension ducts are needed in any section to
achieve the required length then the final section of the
assembly must not be less than 275mm without cutting the
terminal assembly.
NOTE: The flue duct of the final extension must be 30mm longer
than the air duct.
Each section must be connected to the previous section of the
flue bend by fixing the flue ducts together and then similarly
fixing the air ducts which engage the elbows.
Fit the assembly as described in Section 11.9, 11.10 as
appropriate.
Make good the internal and external brickwork or rendering.
11.13 Vertical Adapter for Horizontal Flues
An adapter is available for an initial short section of vertical flue.
Refer to Fig. 31.
Measure and cut the flue as described in Section 11.11.
The first, vertical, section (equivalent to dimension X) is
measured from the top of the boiler casing. Cut the vertical
section of the extension duct to 167mm less than the measured
distance. Do not remove the socketed ends.
The minimum measured distance is 167mm.
Seal the air duct to the spigot using silicone sealant.
11.14 Completion of the Installation
Check that all the gas and water connections on the manifold
have been tightened.
Undo the two screws and remove the connections cover panel.
Refer to Fig 32.
Connect the mains supply lead to the appliance and secure in
the cable clamp. Make sure that the lead is isolated before
connection. Refer to Section 10.
Check that there is sufficient loose lead to allow the release of the
facia panel assembly and that the earth lead of the mains supply
is longer than the live and neutral leads.
Fit the facia-mounted clock or programmer. Full instructions are
sent with the control. Refer to Fig 33 and 34.
Connect any external controls ensuring that the leads pass
through the appropriate cable clamp. Refer to Section 10 and Fig
35 and 36.
Test for gas soundness as described in BS6891.
If the appliance is not to be commissioned immediately, replace
the connection cover panel and the cabinet.
Check that the gas and electricity services have been turned off.
17
120mm
100mm
Fig. 30 - Elbow to Flue Turret
Assembly.
Fig. 31 Vertical Adapter.
Flue Duct
Air Duct
Adapter
Flue Spigot
Flue Turret
Bend
Fig. 32. Facia connections cover
Fig. 33. Programmer connection
1. Facia (gently pull forward to un-clip and remove)
2. Control panel (boiler outer casing in place)
3. Programmer cover (un-clip to remove. See Fig. 34)
4. Programmer location in detail
5. Programmer connections (See Fig. 34)
6. Programmer connector plug
7. Programmer
2
2
1
1. Controls connector cover
2. Controls connector cover fixing screws (2)
1
*5mm
*When connecting to an elbow the flue duct must be
5mm longer than the air duct.
2
3
5
6
4
7