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10 Installation
instructions
Danger of fire and explosion!
Unprofessional handling with gas
pipes, gas connections and supplied
devices can produce gas leaks. It is
highly dangerous if gas is ignited!
Working with gas pipes and supplied
appliances is only allowed by approved
installers.
Mount the flexible connection so that it
can compensate the longitudinal
expansion of the tube.
Only use flexible connections for the
radiant tube regarding:
• gas
• electricity and
• air (if necessary)
Fig. 17: Longitudinal expansion
Gas-pipe system and mounting of
heaters
Assembling of gas pipes to the appliance, supply and
the mounting of the appliance is only allowed by a
competent person who is registered, holding a current
certificate of competence and in accordance with the
relevant provisions of the gas safety (installation and
use) regulations.
Additional installation notices of national or local
institutions must be observed. The pipe must be
dimensioned in that way that the minimum connection
pressure in front of the gas combination valve of the
individual devices are available at the nominal thermal
load of the entire system, according to table 6.
Please consider the pressure drop of the upstream
mounted gas connection and gas filter. For the
detailed pressure drop value of the Schwank gas-
pipe-systems see table 7.
Minimum connection pressures in front of valve
novoSchwank shape L
Type
connection
Natural
20S L - 55S L
gas H*
Natural
20S L - 55S L
gas L*
20S L - 55S L
Propane
3
* Natural gas H: Hi,n: 9.97 kWh/m
Tab. 6:
min. connection pressures in front of gas
combination valve
Pressure drop Schwank flexible gas-pipe-systems
novoSchwank shape L
Type
20S L – 35S L
Natural
gas H
45S L – 55S L
20S L – 35S L
Natural
gas L
45S L – 55S L
Propane
20S L – 35S L
45S L – 55S L
Tab. 7: Pressure drop Schwank flexible gas-pipe-systems
The max. connection pressure is 60mbar!
In case of contaminated gas pipes
and generally at gas pipes of welded
black steel have to be mounted gas
filter-groups directly in front of the
heater (see page 37).
novoSchwank L
min.
nozzle
start step
pressure
pressure
pressure
[mbar]
[mbar]
[mbar]
15
10
4 - 5
20
15.2
6 - 7
40
37
22
3
Natural gas L: Hi,n: 8.57 kWh/m
Gas pipe
Pressure drop
system
[mbar]
1/2" / L=800mm
2
3/4" / L=800mm
2
1/2" / L=800mm
2
3/4" / L=800mm
2.5
1/2" / L=800mm
1
3/4" / L=800mm
1
23
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