21
British Gas 4100 & 4125 RD2 -
Installation & Servicing
INSTALLATION
28 FLUE EXTENSION DUCTS - continued
FLUE KITS
Pack B:
supplied as standard.
Pack D:
optional extension kit for side flue, top or rear flue outlet. Refer to Frame 27.
1.
A maximum of 2 extension ducts (plus the standard flue duct) may be used together.
2.
Flue extensions of greater than 1m (39") should be supported with the bracket
provided.
27 FLUE EXTENSION DUCTS
Flue length mm
100 Pack Req.
125 Pack Req.
Product No.
Up to 600
B, 1 off
B, 1 off
150 308
600 to 1000
B, 1 off + D, 1 off
B, 1 off + D, 1 off
150 308+152132
600 to 1550
B, 1 off + D, 1 off
N/A
150 308+
152132, 1 off
1550 to 2000
B, 1 off + D, 2 off
N/A
150 308+
152132, 2 off
Top outlet flue length
= A + B + Elbow allowance
90
o
Elbow = 1m
45
o
Elbow = 0.7m
29 FITTING THE KIT
1.
Remove the cardboard support aid from the flue and
place safely to one side.
2.
Fit the inner flue extension duct onto the inner flue duct.
3.
Fit the outer flue extension duct onto the outer air duct.
4.
Drill 3 - 3.2mm (
1/8
") dia. holes through the outer air duct.
Do not drill the inner flue
duct.
5.
Insert the self tapping screws provided to fix the air duct
in position.
6.
Repeat steps 1-5 if a second flue extension is required.
INST
ALLA
TION
