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infraSchwank D / calorSchwank D - shape U
10 Installation
instructions
Danger of fire and explosion!
Unprofessional handling of gas pipes,
gas connections and the appliance can
produce gas leaks. It is highly dangerous
if gas is ignited!
Working on gas pipes and the 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)
a
b
Fig 14: Longitudinal expansion
Gas-pipe-system and mounting of
heaters
All gas installation work must be carried
out only by an authorised person in
accordance with standard AS 5601.
Additional installation notices of national or local
institutions must be observed. The pipe must be
dimensioned in a way that the minimum connection
pressure in front of the gas combination valve of the
individual devices is 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
20
pressure drop value of the Schwank gas-pipe-systems
see table 7.
Minimum connection pressures in front of valve
infraSchwank D / calorSchwank D shape U
min.
connec-
type
tion
pressure
[kPa]
Natural
15 - 40U
1.13
gas*
Propane* 15 - 40U
2.75
* Natural gas: H
,
: 37,8 MJ/m
S
B
Tab 6:
min. connection pressures with single and two stage
regulation in front of gas combination valve
Pressure drop Schwank gas-pipe-systems
infraSchwank D / calorSchwank D shape U
type
Natural
15 - 30U
gas
40U
15 - 30U
Propane
40U
Tab 7: Pressure drop Schwank gas-pipe-systems
The max. connection pressure for
natural gas is 5.0kPa!
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 35).
Flexible final connections to the heater must either
a) hose assembly to AS/NZS 1869 of a suitable size,
temperature and pressure rating or
b) a limited flexibility connector to AS 4631 of a
suitable size.
nozzle pressure
two stage
single
max. - min.
stage
[kPa]
[kPa]
0.87
0.87 - 0.6
2.4
2.4 - 1.4
3
3
Propane: H
95.8 MJ/m
S,B
gas pipe system
pressure drop
1/2" / L=800mm
3/4" / L=800mm
1/2" / L=800mm
3/4" / L=800mm
start step
pressure
[kPa]
0.4 - 0.5
1.2
[kPa]
0.2
0.25
0.1
0.1
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