Technical data

29
10.0 Installation
© Baxi Heating UK Ltd 2014
10.4 Fitting the Pressure Relief Discharge Pipe
(Fig. 44)
1. Remove the discharge pipe from the kit.
2. Determine the routing of the discharge pipe in the vicinity
of the boiler. Make up as much of the pipework as is
practical, including the discharge pipe supplied.
3. The pipework must be at least 15mm diameter and run
continuously downwards to a discharge point outside the
building. See section 6.7 for further details.
4. Utilising one of the sealing washers, connect the discharge
pipe to the adaptor and tighten the nut.
5. Complete the discharge pipework and route it to the
outside discharge point.
IMPORTANT: Make all soldered joints before connecting
to the pressure relief valve.
10.5 Condensate Drain (see Section 7.7)
1. Connect the condensate drain to the trap outlet pipe.
Ensure the discharge of condensate complies with any
national or local regulations in force (see British Gas
“Guidance Notes for the Installation of Domestic Gas
Condensing Boilers”.
2. The connection will accept 21.5mm (
3
/
4
in) plastic overflow
pipe which should generally discharge internally into the
household drainage system. If this is not possible, discharge
into an outside drain is acceptable.
10.6 Fitting The Flue
HORIZONTAL FLUE
1. The standard flue is suitable for lengths between 100mm
minimum and 685mm maximum, as measured from the edge
of the flue elbow outlet to the joint between the terminal
and air duct (Fig. 45).
2. Locate the flue elbow on the adaptor at the top of the
boiler. Set the elbow to the required orientation (Fig. 47).
NOTE: The flue elbow is angled at 93 degrees to ensure
a fall back to the boiler.
3. Measure the distance from the outside wall face to the
elbow. This dimension will be known as ‘X’ (Fig. 48).
4. To dimension ‘X’ add 50mm. This dimension to be known
as ‘Y’.
IMPORTANT: Check all dimensions before cutting.
5. Mark dimension ‘Y’ on the flue as shown (Fig. 49).
Carefully cut the waste material from the flue, ensuring that
the ducts are square and free from burrs.
Fig. 44
Pressure Relief Valve
Discharge Pipe
Fig. 45
100mm 685mm
Fig. 49
Wall Thickness
(X)
Wall Thickness
(X)
Flue Elbow
Fig. 47
Adaptor
Apply Lubricant for
ease of assembly.
Ensure Elbow is fully
engaged into Boiler
Adaptor
Fig. 48
Y
Flue
Waste