Technical data
Gas installation
20 Installation and maintenance instructions ecoTEC plus 0020116700_06 
5
5 Gas installation
The work described in this section must only be carried out 
by a competent person.
5.1 Preparing for installation
a
 Danger!
Risk of death from incorrectly installed 
gas system!
An incorrect gas installation can result in 
leaks and an explosion. 
 > During installation, the legal directives 
and the local regulations for gas supply 
companies must be observed.
a
 Danger!
Risk of death from incorrectly installed 
gas system!
Tension in the gas line can result in leaks or 
an explosion.
 > Make sure there are no stresses in the 
gas lines when it is installed.
b
 Caution.
Risk of damage caused by incorrect gas 
installation.
Excess test pressure or operating pressure 
can cause damage to the gas valve.
 > When the entire gas installation is tested 
for leaks, the maximum pressure at the 
gas valve must not exceed 0.75kPa 
(75mbar).
b
 Caution.
Risk of damage caused by contaminated 
lines.
Foreign bodies such as welding remnants. 
sealing residue or dirt in the connection 
lines for gas can cause damage to the 
boiler.
 > Blow the gas line clean prior to installa-
tion.
b
 Caution.
Risk of damage caused by using the 
wrong gas type.
Using the wrong gas type can cause a fault 
shutdown on the boiler. Furthermore, igni-
tion and combustion noise may occur in the 
boiler.
 > Only use propane gas for propane-fired 
boilers in accordance with BS 4250: Part 
1 (1987).
5.2 Connecting the gas pipe
5.1  Fitting the gas connection (example: VUW boiler)
 > Make the gas connection as shown.










