Commissioning High/Low
COMMISSIONING MUST BE CARRIED OUT BY A COMPETENT
REGISTERED ENGINEER (CORGI), ALSO TO BE USED WITH
BURNER COMMISSIONING DETAIL SEE BURNER INSERT.
1.
Visually check full system to see if it is in accordance with our manual
and to current/CORGI legislation and IEE regulations and to this
manual.
2.
Check combustion air is adequate in plant room or surrounding area.
3.
Check contractors electrical wiring is correct & terminated tight and fuse
ratings are correct.
4.
Ensure that the gas pipe work is sized correctly and relative documents
for soundness and purging are available. It is the responsibility of the
commissioning engineer to check for soundness from the main inlet to
servicing stop tap on inlet of valve.
5.
Ensure that the inlet gas pressure is no greater than 75mb static and no
less than 17.5mb running.
6.
Make sure that all dampers are set and diffuser outlets are open to give
correct air flow and that the correct number of air bypass blades have
been removed to bypass the air in excess of our maximum amount of air
through our heater, which can be found in the section ‘Minimum and
Maximum Air Volumes’ in this Manual.
7.
Check with the controls engineer that he has an interlock with the supply
fan and burner so that the burner can not run without the supply fan e.g.
air pressure switch across supply fan in series with our enable circuit
between 1 & 2. The controls engineer must keep the supply fans
running on for 15 minutes after burner shutdown, on a shutdown
condition. The terminals 1 & 2 are also used to wire stats and time
switched in series to switch the burner on and off. Terminals 6 & 7 are
required for high/low operation and is fixed air turndown, when the
circuit is made it is high and when it is broken it is low.
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