Daikin ROTEX GW-20 H18 Installation Instructions Manual page 22

5.6.3 Permitted pipe lengths at parallel air supply and flue tube
systems
Permitted pipe lengths when applying Ø80 mm.
RHOB12AAV1H
RHOB18AAV1H
RHOB42AAV1H
(*) Under certain conditions, a greater total length is possible.
Also see par. 5.5.9
In case of greater or smaller pipe diameters, the permissible pipe length is greater or
smaller respectively. In case of smaller diameters, the following applies:
Ø70: 0.59x the permitted pipe length for Ø80
Ø60: 0.32x the permitted pipe length for Ø80
Ø50: 0.15x the permitted pipe length for Ø80
Contact the manufacturer for test calculations for the resistance of the air supply and
combustible gas outlet pipe and the wall temperature at the end of the combustible gas
outlet pipe.
Replacement lengths
Bend 90° R/D=1
Bend 45° R/D=1
Knee 90° R/D=0.5
Knee 45° R/D=0.5
Calculation example
Pipe Pipe lengths
Flue gas outlet L1 + L2 + L3 + 2x2 m
Air supply L4 + L5 + L6 + 2x2m
Note:
The total pipe length is: sum of the straight pipe lengths + sum of the replacement pipe
lengths of bends/knees amounts to a total of 25 meters. If this value is less than the
maximum permitted pipe length, the flue gas outlet meets the requirements on this point.
5.6.4 Passage, materials and insulation
CZ
C13 all materials
C33 all materials
C53 all materials
C43 all materials
C63 all materials (2)
C83 all materials
C93 all materials
(1) Gas exhaust/air intake parts can be bought from a 3
All parts purchased from an external supplier MUST comply with EN14471.
(2) NOT allowed.
ROTEX Heating Systems GmbH
C13 C33 (*) C43 C53
100 m 100 m 100 m 100 m
100 m 100 m 100 m 100 m
60 m 60 m - 60 m
2 m
1 m
4 m
2 m
Pipe length total
13 m
12 m
Supplier per country
FR DE IT BE SP
Rotex
Rotex
Rotex
Rotex
(1) (1) (1) (2) (1)
Rotex
Rotex
party.
rd
C83
100 m
100 m
-
UK PL
(1) (2)
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