Installation and Service Manual Upsilon-Series
19
6.4 Gas line
Mount the gas line in accordance with present legislation.
If required, mark the gas line in accordance with present legislation.
United Kingdom:
The gas supply must comply to the current Gas Safety, Installation & Use Regulations.
Ireland:
- Irish standard 813
- Domestic gas installations
The gas line leading to the installation has to be calculated to the maximum capacity to
determine the diameter of the supply pipe.
The gas line has to be placed on the allocated openings of the flange plates of the pipe
work headers flow/return and secured on all flange plates by the special M6x8x16 close
tolerance bolts.
Pressure loss for a newly installed natural gas line may be 1.7 mbar max. In the case of
an extension, this may be 2.5 mbar max. This value is to be measured in between the
operational gas meter and the CH-boilers.
For correct functioning of the boilers, it is necessary that the gas dynamic inlet pressure
must be at least 19 mbars.
With regard to new lines in particular, ensure that the gas line does not contain
any residual pollution.
The Upsilon boilers can be converted from natural-gas to propane/lpg and from propane/
lpg to natural-gas. When the boiler has to be converted, A.O. Smith provides special kits
for this purpose. Special instructions are supplied with the kit.
The lpg-gas has to have a propane purity of at least 90%. When the butane-level
is greater then 10% the warranty conditions on the heat exchangers are not valid.
Following maintenance tasks always check all gas carrying components for
leakages by using leakage detection spray.
Figuur 6.4.a
