Appliance Check And Maintenance; Combustion Parameters - Immergas INTEC 30 System External Installation Instructions Manual

3.16 APPLIANCE CHECK AND
MAINTENANCE.
The following checks and maintenance should
be performed every 24 months.
- Clean the flue side of the heat exchanger.
- Clean the main burner.
- If deposits are detected in the combustion
chamber one must remove them and clean the
heat exchanger coils using nylon or sorghum
brushes; it is forbidden to use brushes made of
metal or other materials that may damage the
combustion chamber itself.
- Check the integrity of the insulating panels
inside the combustion chamber and if damaged
replace them.
- Visually check for water leaks or oxidation
from/on fittings and traces of condensate
residues inside the sealed chamber.
- Check contents of the condensate drain trap.
- Via the condensate drain cap check that there
are no residues of material that clog condensate
passage; also check that the entire condensate
drain circuit is clear and efficient.
In the event of obstructions (dirt, sediment,
etc.) with consequent leakage of condensate
in the combustion chamber, one must replace
the insulating panels.
- Check that the burner seal gaskets and the lid
are intact and perfectly efficient, otherwise
replace them. In any case the gaskets must be
replaced at least every two years, regardless of
their state of wear.

3.17 COMBUSTION PARAMETERS.

INTEC 12 SYSTEM EXTERNAL
Gas nozzle diameter
Supply pressure
Flue flow rate at nominal heat output
Flue flow rate at min heat output
CO at Nom Q./Min.
2
CO with 0% O at Nom Q /Min.
2
NO with 0% O at Nom Q /Min.
X 2
Flue temperature at nominal output
Flue temperature at minimum output
INTEC 30 SYSTEM EXTERNAL
Gas nozzle diameter
Supply pressure
Flue flow rate at nominal heat output
Flue flow rate at min heat output
CO at Nom Q./Min.
2
CO with 0% O at Nom Q /Min.
2
NO with 0% O at Nom Q /Min.
X 2
Flue temperature at nominal output
Flue temperature at minimum output
- Check that the burner is intact, that it has no
deformations or cuts and that it is properly
fixed to the combustion chamber lid; otherwise
it must be replaced.
- Visually check that the water safety drain valve
is not clogged.
- Check that, after discharging system pressure
and bringing it to zero (read on boiler pressure
gauge), the expansion vessel pressure is at 1.0
bar.
- Check that the system static pressure (with
system cold and after refilling the system by
means of the filling valve) is between 1 and 1.2
bar.
- Visually check that the safety and control
devices have not been tampered with and/or
shorted, in particular:
- temperature safety thermostat;
- Check the condition and integrity of the electri-
cal system and in particular:
- supply voltage cables must be inside the
fairleads;
- there must be no traces of blackening or
burning.
- Check ignition and operation.
- Check correct calibration of the burner in
domestic hot water and central heating phases.
23
- Check the operation of the appliance control
and adjustment devices and in particular:
- system regulation probes intervention;
- domestic hot water control thermostat inter-
vention.
- Check sealing efficiency of the gas circuit and
the internal system.
- Check the intervention of the device against
no gas ionisation flame control. The relative
intervention time must be less than 10 seconds.
N.B.: in addition to maintenance, one must also
check the thermal system, with frequency and
procedures that comply with the indications of
the technical regulations in force.
NG (G20)
mm 3,80
kPa 1,13
kg/h 19
kg/h 4
% 9,60 / 8,90
- 0,00125 / 0,00003
mg/kWh 30 / 13
°C 63
°C 60
NG (G20)
mm 6,90
kPa 1,13
kg/h 48
kg/h 10
% 9,45 / 8,90
- 0,00153 / 0,00001
mg/kWh 51 / 17
°C 40
°C 64
Universal LPG (G31)
2,80
2,75
19
4
11,00 / 10,30
0,00173 / 0,00003
35 / 17
64
62
Universal LPG (G31)
4,80
2,75
49
10
10,60 / 9,70
0,00160 / 0,00003
61 / 25
40
63