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Fault Finds Level 3 Diploma in Gas Engineering
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Fault Finds Level 3 Diploma in Gas Engineering good for gas
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Name:Address:
Date:
Appliance type: ideal logic + combi boiler 26kw
Meter: E6
Fault find 3
At approximately 9:00 am I received a call from a customer stating that every
time they turned on the boiler there is a loud noise coming from it which has
brought cause for concern as they think it might blow up. I asked the customer
“does this happens as soon as the boiler turns on” and they said “yes”. Instantly
I started to diagnose the problem before I got to the property as I knew that in
most cases where the boiler is making loud noises there is a problem with the
fan.
When I arrived at the property, I went to the boiler and turned it on. Straight
away I heard the loud whirring noise that the customer was talking about. I knew
that I would need to open the boiler up to inspect it but prior to doing that I
needed to conduct a visual inspection, tightness test and isolate appliance. In my
visual inspection I checked for interference or damage to the appliance that may
affect the efficiency of my work, like a loose bracket that could make the current
meter on the wall unstable. I then inspected the top of the meter by making sure
that the Emergency Control Valve (ECV) falls to the OFF position and that there is
a label indicating what position means the ECV is on or off. Gradually I worked
my way down the meter analysing that the pipework/anaconda is in good
condition (no paint or dents/holes), the brackets holding the meter are secure
and that the tamper seal has not been tampered with and is sitting correctly on
the regulator. When I finished my inspection and was certain that I checked
everything correctly, I moved on to the tightness test. Prior to starting the
tightness test I made sure that the U-gauge I was using was in good working
condition and that the water inside of it was level to zero-zero millibar. I
performed this tightness test to make sure that the installation that was done
before is safe. The first test that I performed on the meter was the let–by test, to
ensure that there is no gas that can pass through the valve when it is turned off,
so I isolated all appliances starting farthest from the meter. I removed the screw
from the test point and replaced it with the tube from the U-gauge. I then put the
ECV to the on position, to make pressure, so that the reading within the U-gauge
was at 10 mb (millibar) and then timed it to run for 1 minute. Once I was fulfilled
with my let-by test that proved no gas was passing through when the ECV was in
the off position I moved on to conducting my temperature stabilisation.
Temperature stabilisation is done to allow the water and gas in the U-gauge to
equalise in temperature so the reading from the tightness test will be accurate.
With the tube still attached to the test point I made sure that the reading on the
U-gauge was back on its original position (zero-zero millibar). I Then turned the
ECV to the on position to allow the pressure to let the water rise to 20 mb,
subsequently timing it for 1 minute. When I was done with my temperature
stabilisation and content that my results were adequate, I moved on to the
tightness test. The tightness test is implemented to test the entire installation
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