British Gas RD 628 Installation And Servicing Instructions Download

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an extension is fitted.

6.35.

Using the flue as a guide, mark the position of

the hole required to accept the flue terminal or meas-
ure the flue centre position as shown in figs 1 and 2.

6.36.

Measure and note the distance from the rear of

the boiler to the wall for rear exit flues, or from the
appliance cabinet side to the wall for left/right exit
flues. This will be used to calculate the flue length
“L”.

6.37.

Pull the boiler forward to allow fitting of the flue

terminal.

6.38.

Cut a round hole in the wall of minimum diame-

ter 150 mm.

6.39.

Measure and note the wall thickness through

the hole. This will be used to calculate the flue length “L”.

6.40.

Fix any further extensions to the elbow in a sim-

ilar manner to 6.28 to 6.30.

6.41.

Check that the telescopic flue slides freely.

Push the telescopic terminal section onto the last
elbow/extension and fasten in a similar manner to
6.28 to 6.30.

6.42.

Calculate the length “L” as shown in figs 1 & 2

in conjunction with Section 4 i.e. distance from rear
of appliance to outside face of the wall, or distance
from side of appliance cabinet to outside face of the
wall.

6.43.

Slide the telescopic terminal to set the length

“L” from the outside of appliance to the inside edge
“A” of the terminal seal locating slot. See fig 6a.

6.44.

Using the fixing holes as a guide , drill through

with the 2.8mm drill bit provided in the kit and fasten

the telescopic terminal section using the two self
tapping screws provided.

6.45.

Slide the boiler back into position carefully

feeding the flue terminal through the hole in the wall.

6.46.

Where vertical flue sections have been fitted

raise the air box/flue assembly by 3mm per 1 metre
flue extension, to allow for the flue tube expansion,
and fix the assembly in place. the wall bracket is pro-
vided in the 1 metre extension kit.

6.47.

To prevent rain running back into the terminal, it

is recommended that the terminal exit slopes down
by a few degrees. This can be achieved by holding
the terminal strip down at the external end and plac-
ing packaging material between the topside of the
terminal and the wall, inside the hole. Check the
slope using the spirit level.

6.48.

Make good the internal and external brickwork

or rendering.

6.49.

Push the rubber sealing gasket over the termi-

nal. The locating rib of the rubber seal fits into the
locating slot of the flue terminal as shown in Fig. 6a
and 6b.

6.50.

Undo the locking band on the burner air cowl

and remove the air inlet silencer tube.

6.51.

Fix the flexible duct between the burner and air

box using the locking band provided within the kit
and the locking band removed from the burner air cowl.
Tighten sufficiently to form a good seal. See Fig. 7.

Note: If the flue assembly is taken apart after the
appliance has been running the 80mm flue tube
seals within the flue tubes should be replaced.

7. Accessory/spare parts List

Short

RS flue kit

7 716 190 027

Standard

RS flue kit

7 716 190 023

Long

RS flue kit

7 716 190 024

RS 500mm Extension Flue Kit