Bosch Worcester Danesmoor Utility Regular ErP+ 12/18 Installation, Commissioning And Servicing Instruction Manual page 25

Pipework connections - System
A - Flow connections 12/18 & 18/25 - 22mm Ø , 25/32 - 28mm Ø
B - Return connections 22mmØ copper on 12/18, 18/25 models and
28mmØ copper on 25/32 models
C - Condensate outlet 21.5mm Ø
D - Flue outlet
E- Oil pipe optional centres
F - Optional oil line return line connection
PRV - 15mm Ø
For servicing purposes, keep condensate and pressure
relief discharge pipes away from components and
pipework connections.
69
35
B
48
19
A
TOP VIEW
All dimensions in are millimetres
Fig. 32 Top view of System boiler pipe connections
69
35
100
B A
825
412
FRONT VIEW
All dimensions in are millimetres
Fig. 33 Front view of System boiler pipe connections
Greenstar Danesmoor Utility ErP+ and Utility System
370
67
48
PRV
67
D
PRV
21.5
C
E
F
40
321
ErP+ - 6 720 821 720 (2018/04)
Flue centres
185
D
*Centre line
measurement to
the outside of the
760*
boiler case
FRONT VIEW
Fig. 34 Flue centres
Flue opening
▶ Follow figure 35 to mark the centre of the flue (1, & 2) for rear
opening, (2 & 3) for side opening or (1 & 4) for top opening.
All horizontal flue sections must rise away from the boiler
by 52mm per metre to ensure that condensate flows
back into the boiler for safe discharge via the condensate
waste pipe.
▶ Make an opening (F, G or H) using a core drill or similar at a size
relative to the wall thickness as shown below:
125mm Ø flue:
Wall thickness mm Flue hole size Ø mm
150 - 240
240 - 330
330 - 420
420 - 500
F G
3
155
F
+5
** This measurement depends
on the distance that the boiler
is from the wall, 760mm is a
minimum measurement.
Fig. 35 Flue opening
Installation
RS 155 CF 170
D
SIDE VIEW
155
160
165
170
H
4
RS 155
CF 170
G
1
190
H
760**
6720808218-23.1Wo
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