ABB EasyLine Series - Page 30

30 EasyLine EL3000 Series Commissioning Instructions
Combustion gas
Quality Hydrogen (H
2
),
Quality 5.0
H
2
/He mixture
(40 %/60 %)
Inlet pressure p
e
= 1200 ± 100 hPa p
e
= 1200 ± 100 hPa
Flow
 3 l/h
approx. 10 l/h
NOTE
H
2
/He mixture may only be used if the gas analyzer has been ordered
and supplied in the execution specified for this. If the gas analyzer has
been supplied in the execution for H
2
/He mixture, H
2
may not be used as
a combustion gas under any circumstances. This would cause
overheating and therefore the destruction of the detector!
ATTENTION
A flow restriction and a shut-off valve must be installed in the
combustion gas supply line by the end user, so that safe operation of
the gas analyzer is ensured.
Flow restrictor in the combustion gas supply line
The combustion gas flow must be restricted to a maximum of 10 l/h of H
2
or 25 l/h of H
2
/He mixture. Suitable measures outside the gas analyzer
must be provided by the end user for this purpose.
ABB recommends the use of a bulkhead fitting with an integrated flow
restrictor which must be installed in the combustion gas supply line. This
bulkhead fitting can be purchased from ABB:
 Combustion gas H
2
: Part Number 8329303,
 Combustion gas H
2
/He mixture: Part number 0769359.
Shut-off valve in the combustion gas supply line
A shut-off valve must be installed in the combustion gas supply line to
increase the safety in the following operating states:
 Shutting down the gas analyzer,
 Failure of the instrument air supply,
 Leakage in the combustion gas feed path inside the gas analyzer.
This shut-off valve should be installed outside the analyzer house in the
vicinity of the combustion gas supply (cylinder, line).
ABB recommends the use of a pneumatic shut-off valve which is
actuated by the instrument air. Recommendation: Type
Swagelok
®
SS-
42GS6MM-A15C3.
If a pneumatic shut-off valve of this kind cannot be installed,
precautionary measures must be taken, so that the overall status or the
"failure" status of the gas analyzer is monitored (see section "Fidas24:
Troubleshooting (see page 129)").