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MAINTENANCE
MAINTENANCE
Fig. 10.19
Model M300V.3035 SM
Nominal heat input
(A) (E)
kW
31,0
Nominal efficiency
%
98,8
Combustion efficiency
%
99
Air index
n
1,7
Flue gas CO
2
content
%
8,5 - 9,5
Flue gas O
2
content
%
4,8
Flue gas CO
content
ppm
200
Flue gas temperature
°C
78,0
Values refer to tests with a an 80 mm double exhaust
split by 1 + 1 m and natural gas G20 and a supply /
return heating temperature of 60°/80°C.
The values in the tables are measured at
the nominal useful power with factory cali
-
bration.
10.12 Checking the condensate
drain pipe
The condensate drain pipe 32 (Fig. 10.20)
does not require any particular mainte
-
nance but just check:
•
That no solid deposits have formed, if so
remove them.
•
That the condensate drain piping is not
clogged.
To clean the inside of the siphon, remove it
and turn it upside down to remove any dirt.
Fig. 10.20
32
10.13 Visual inspection of appliance
Visually inspect all water joints, seals and
connections for any evidence of leakage
and retighten, grease or replace them as
necessary.
10.14 Checking the gas supply
pressure
Check appliance for gas tightness.
Re-check operational pressures as de
-
scribed in section "Checking the gas supply
pressure" on page 60 of this manual.
10.15
Water inhibitor concentration
Where chemical products are used the level
of water treatment should be checked on an
annual basis and re treated after full or par
-
tial drain down.
A conductivity meter can be used to check
the correct concentration of inhibitor in the
heating water.
