Flue Measuring And Cutting - Worcester Greenstar Highflow 440CDi ERP Installation, Commissioning And Servicing Instructions

INSTALLATION
All dimensions in millimetres
X Y
3
123
X
+13
Fig. 21 Boiler flue outlet positions
[*] Increase this height by 52mm for every metre of horizontal flue
length that the boiler is away from the flue opening
4.4

Flue measuring and cutting

NOTICE: Flue installation
▶ Refer to the Flue Kit Installation instructions provided
with your flue kit to correctly install the flue with this
Floor standing boiler
NOTICE: FLUE LENGTH
▶ Do not exceed the maximum straight length for a
horizontal or vertical flue or a 60mm plume
management system (if used) as stated in the
relevant Installation, Commissioning and Servicing
Instructions manual or addendum.
Cutting the flue to an exact measurement is not normally
required as the telescopic flue terminal can allow for
some adjustment.
Maximum effective flue lengths HF 440/550 CDi
60/100 horizontal
60/100 vertical
80/125 horizontal
80/125 vertical
Table 12 Maximum flue lengths
22
Z
4
123
Y
1
267
343
Z 2
743*
ErP
L max. (mm)
4 000
6 400
13 000
15 000
Flue Length guide
Flue length range (mm)
1)
140 - 265
310 - 530
530 - 750
750 - 1260
1260 - 1480
1480 - 2210
2210 - 2430
2430 - 3160
3160 - 3380
3380 - 4000
Table 13 Flue extension guidance up to 4000mm
1) The flue is cut to a minimum of 130mm the flue connector adds the additional
10mm.
Access to combustion chamber for flue installation
▶ Grip the top outer sides of the front panel [1] pull forward to release
the ball catches [2] and lift away from retaining lugs [3].
▶ Remove retaining screw [4] to swing control panel assembly [5]
outwards to its full extent.
▶ Pull clip [6] outwards to release expansion vessel [7].
▶ Swing expansion vessel [7] outwards.
For easier access to the inner case, the expansion vessel
can be unhooked (by removing the retaining screw on
the hinge) lowered and moved to the side. Take care not
to overstretch the flexible pipe connections.
▶ Remove the four screws [8] and remove the inner combustion case
cover [9].
▶ Remove the two screws [10] at the front inside edge of the side
panels [11] and lift the top panel [12] and pull forward to remove for
easier access
5
4
1
Fig. 22 Access for flue connection
Greenstar Highflow CDi
Cut Number of extensions
YES None
NO None
NO None
YES 1
NO 1
YES 2
NO 2
YES 3
NO 3
YES 4
12
10
8
2
9
6
11
3
7
ErP - 6720818077 (2016/04)