Rotex RHYKOMB33AA User Manual

7 Installation
Installation and operation manual
18
RHYKOMB33AA
ROTEX HPU hybrid gas boiler module
4P353068-1B – 2014.02
7.7.3 Calculate the total piping length
When the resistance of the flue pipe and air supply pipe increase,
the appliance power will decrease. The maximum permitted
reduction in power is 5%.
The resistance of the air supply pipe and combustion gas flue
depends on:
▪ the length,
▪ the diameter,
▪ all components (bends, elbows,…).
The total permitted pipe length of the air supply and the combustion
gas flue is indicated for each appliance category. For dual pipe
connection, the indication of pipe length is based on Ø80 mm.
Equivalent length
Length
R/D=1 Bend 90° 2 m
Bend 45° 1 m
R/D=0.5 Elbow 90° 4 m
Elbow 45° 2 m
R
R
DD
R/D=1 R/D=0.5
For a dual pipe connection, all defined lengths assume a diameter of
80 mm. In case of smaller or larger pipe diameters, the permissible
pipe length is respectively smaller or larger. In case of smaller
diameter, the following applies:
▪ Ø70: 0.59 × the permissible pipe length for Ø80
▪ Ø60: 0.32 × the permissible pipe length for Ø80
▪ Ø50: 0.15 × the permissible pipe length for Ø80
Contact the manufacturer to check the calculations for the resistance
of the air supply and combustion gas flue pipe and the wall
temperature at the end of the combustion gas flue pipe.
L6
L4 L3
L1
L2
L5
Sample calculation for dual pipe application
Pipe Pipe length Total pipe length
Flue pipe L1+L2+L3+(2×2) m 13 m
Air supply L4+L5+L6+(2×2) m 12 m
Total piping length = sum of the straight pipe lengths + sum of the
equivalent pipe length of bends/elbows.
7.7.4 Appliance categories and pipe lengths
Following installation methods are supported by the manufacturer.
Single boiler installation
INFORMATION
All piping lengths in the tables below are maximum
equivalent piping lengths.
1
L1
L1
L2
L1
3
2
C
53
C
93
C
13
C
33
L2
4
L1

Rotex RHYKOMB33AA Specifications

General

Brand	Rotex
Model	RHYKOMB33AA
Category	Boiler
Language	English