Inspection and maintenance 12
0020289288_02 MicraCom Installation and maintenance instructions
31
▶
For IE: Complete a “Declaration of Conformity” to indicate
compliance to I.S. 813. An example of this is given in the
current edition of I.S. 813.
▶
When you have finished the installation, affix the en-
closed sticker (which requests that the user reads the
instructions) to the front of the product in the end user's
language.
▶
Draw attention, to the current issue of the Gas Safety
(Installation and Use) Regulations, Section 35, which
imposes a duty of care on all persons who let out any
property containing a gas appliance in the UK.
▶
Explain to the end user how the safety devices work and
where they are located.
▶
Inform the end user how to handle the product.
▶
In particular, draw attention to the safety warnings that
the end user must follow.
▶
Inform the end user that they must have the product
maintained in accordance with the specified intervals.
▶
Pass all of the instructions and documentation for the
product to the end user for safe-keeping.
▶
Inform the end user about measures taken to ensure
the supply of combustion air and flue gas guiding, and
instruct the operator that he must not make any changes.
▶
Inform the end user that they must not store or use explo-
sive or highly flammable substances (such as petrol, pa-
per or paint) in the installation room of the product.
▶
Complete and sign off the Benchmark commissioning
checklist.
▶
Complete and sign off the guarantee documentation.
12 Inspection and maintenance
▶
Adhere to the minimum inspection and maintenance in-
tervals.
▶
Carry out maintenance work on the product at an earlier
point if the results of the inspection that was carried out
during previous maintenance make this necessary.
12.1
Checking and setting the CO
₂
content
Note
Only a qualified competent person is authorised
to implement the CO
₂
setting on the gas valve
assembly.
Each destroyed tamper-proof seal must be re-
placed with a new tamper-proof seal. The CO
₂
ad-
justing screw must be sealed.
Never modify the factory setting of the gas pres-
sure regulator of the gas valve assembly.
1.
Check the CO
₂
content. (
▽
If the value is not correct, set the CO
₂
content.
2
1
2.
Remove the sticker.
3.
Remove the covering cap
(1)
.
4.
Turn the screw
(2)
to set the CO
₂
content (value with
front casing removed).
◁
To increase the CO
₂
content: Turn anti-clockwise
◁
To decrease the CO
₂
content: Turn clockwise
Note
For natural gas only: Only perform the ad-
justment in small increments of a 1/8 turn
and wait approx. one minute after each ad-
justment until the value stabilises.
For liquefied petroleum gas only: Only per-
form the adjustment in extremely small incre-
ments (approx. 1/16 turn), and wait approx.
one minute after each adjustment until the
value stabilises.
5.
Compare the measured value with the corresponding
value in the table.
G20
–
Setting the CO
₂
content
Great Britain
Natural gas
H
Removed front
casing
Fitted front cas-
ing
CO
₂
at full load
9.0
±
0.3 %
9.2
±
0.3 %
Set for Wobbe in-
dex W
₀
14.09 kW
⋅
h/m
³
14.09 kW
⋅
h/m
³
O
₂
at full load
4.9
±
0.5 vol. %
4.5
±
0.5 vol. %
CO at full load
≤
250 ppm
≤
250 ppm
CO/CO
₂
≤
0.0027
≤
0.0027