Potterton Powermax HE 85 Litre Installation And Servicing Instructions page 49

Concentric Balanced Flue System
The concentric balanced flue system is
recommended for use with appliances sited near
an outside wall. The Concentric Flue Kit (Part
No. 5106273) includes all the components
necessary for connection to the appliance and
termination on an outside wall and is suitable for
a wall thickness from 200 mm to 450 mm.
A maximum flue length of up to 2.5 m may be
used if required and the flue system may also
include either 1 x 90° (p/n 5106158) or 2 x 135°
bends (p/n 5107645) in addition to standard
appliance elbow.
All additional flue lengths, flue bends and other
kits should be purchased separately as required.
See Pages 8 and 9.
Read the 'Guidance Notes' on Page 2 in
conjunction with the following notes prior to
installation.
a. Remove protective strip from gasket
underneath the twin concentric adaptor and
carefully locate adaptor on top of the
appliance. Ensure a good seal over the flue
and air connections before securely fixing
with the four M4 screws provided.
b. Insert stub flue pipe into flue outlet on top of
boiler.
c. The 90° appliance elbow can now be fitted
into the adaptor and the appropriate length of
flue pipe calculated by measuring between
the outside wall face and the appliance bend
allowing 45 mm to 55 mm to engage into the
bend.
d. Fit outer wall seal to terminal and engage
inner wall plate as shown.
e. All flue components contain rubber lip seals
to ensure both ease of assembly and
excellent sealing. Refer to Page 6 before
cutting.
Note: Powermax HE is a condensing boiler
and the flue system must have a generous
fall back to the boiler of nominally 2°.
Publication No. 5106227
105mm Minimum
with rear
facing
Concentric
Flue
40
Clearance
Optional Terminal
Guard
450
maximum
Concentric
Side View
Terminal
40
Clearance
Concentric
Elbow
Adaptor
Box Assy.
Extension
Dimensions in mm
C/L
Concentric
Rear Flue
(300 min.)
Outer Wall
Inner Wall
Side Flue
Ø100 Air Tube &
Ø60 Flue Tube
Top View
2˚ Angle within terminal
215
165 Approx.
Front View
Outer Wall
Wall
Plate
Inner Wall
Elbow Securing
Adaptor Box Assy.
105
Dimensions in mm
Flue C/L
1.5m max
Concentric
Elbow
View with Extension
& 90˚ Elbow
Concentric Balanced Flue
Flue
65
Fig. 5
Screw
Concentric
Elbow
Top of Boiler
Rear
Concentric
Flue
Concentric
Terminal
Fig. 6
5