Flue Options - Bosch Condens 2000F30 Regular boiler Installation, Commissioning And Servicing Instruction Manual

Gas connections
DANGER: Risk to life from explosion of flammable gases
▶ Work on components in contact with gas must only
be carried out by a competent and authorised
person.
▶ Comply with national and local standards and
regulations
▶ Only use approved methods of making gas tight
connections
Surplus water may be present due to factory testing.
Flue opening
Any 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.
5.4

Flue options

CAUTION: Non accessible flue systems:
▶ Where a flue system is not going to be accessible,
provision must be made for service and inspection.
▶ Voids containing concealed flues must have at least
one inspection hatch no less than 300mm square.
▶ Flue joints within the void must not be more than 1.5
metres from the edge of the inspection hatch.
▶ Inspection hatches should be located at changes of
direction.
▶ If this is not possible, bends should be viewable from
both directions.
NOTICE: Effective flue lengths:
▶ each 90 ° bend used is equivalent to 2.0 metres of
straight flue
▶ each 45 ° bend used is equivalent to 1.0 metre of
straight flue
Flue type
1 High level horizontal flue
2 High level horizontal flue with 2 x 90 ° bends
3 High level horizontal flue with 3 x 90 ° bends
4 Vertical balanced flue assembly
5 Vertical balanced flue with 2 x 90 ° bends
6 Vertical balanced flue with 2 x 45 ° bends
Table 10 Flue options
Product Name
Maximum total
flue length L (mm)
11 000
9 000
7 000
15 000
120 mm
11 000
13 000
Fig. 18 Flue options
L
120 mm
1
L
120 mm
2
L
120 mm
3
500 mm
300 mm
Flat roof
L
5
L
120 mm
6
INSTALLATION | 21
L
4
6 720 ... ... (YYYY/MM)