INSTALLATION
6 720 648 726 (2011/07)
30
8.4
FLUE GAS CONNECTION
8.4.1
OPEN FLUE OPERATION
If operation independent of room air is not desired or
not possible due to local conditions, the boiler can be
set up for operation to take air for combustion from the
room (contact Worcester Technical).
The boiler is factory-fitted with a concentric connection.
An air intake strainer basket can be used for operation
dependent on room air. This prevents falling dirt from
entering the boiler (contact Worcester Technical;
accessory).
8.4.2
ROOM SEALED OPERATION
The boiler can be connected to a concentric flue gas
system.
The boiler is factory-fitted with a concentric connection.
8.4.3
FLUE MATERIAL
When using plastic flue material, PPS is recommended.
8.4.4
CALCULATING THE AIR INTAKE AND FLUE
GAS PIPE DIMENSIONS
The total reduced pipe length is calculated from the sum
of the reduced length of the horizontal and vertical flue
ducting and the reduced length of every elbow
(
Æ
table 7).
The total reduced pipe length must be less than the
maximum pipe length (
Æ
table 6).
See also the next example.
EXAMPLE OF A FLUE DESIGN CALCULATION FOR
CONCENTRIC FLUE SYSTEM 100/150 USING LENGTH
METHOD
Boiler: GB162-80
Flue system: concentric 100/150
Maximum length: 18 m.
Here we have:
•
4 meter pipe (2 x 2 m)
4.0 m
•
2 x 90° bends (2 x 2.1 m)
4.2 m
The total length of this flue system =
8.2 m
Sum of length (8.2 m) < maximum length (18 m)
Æ
robust flue design!
Fig. 36 Example 1
8.5
ELECTRICAL CONNECTIONS
When connecting the electrical components, observe
the wiring diagram, the installation and servicing
instructions of the relevant product.
WARNING:
Damage to the installation due
to short circuits.
To prevent electrical components from
short-circuiting, only use:
– original cables and wiring supplied by the
manufacturer.
– single core cable.
B
Use cable of at least 0.75 mm².
B
If the mains lead has to be replaced, you
may only use an original manufacturer-
supplied mains lead.
DANGER:
Danger of fatal accident due to
electric current when the boiler is open.
B
Before opening the boiler: Isolate the
mains supply.
B
Secure the heating system so that it
cannot be switched on again
unexpectedly, pulling the mains plug
from the wall socket.
The 230V converter can only be used for the
GB162-65 aplliance.
6 720 648 726-036.1TD
Pipe=
2m
Pipe=
2m
Roofterminal
90° bend
Length=
21m
90° bend
Length=
21m
Maximum length
allowed after the
boiler (GB162-80)
18 m
