System Filling; Gas System Start-Up; Boiler Start Up (Ignition); Circulation Pump - Immergas INTEC 30 System External Installation Instructions Manual

1.9 SYSTEM FILLING.

Once the boiler is connected, proceed with
system filling through the arranged filling valve,
which can be connected to the return pipe system
and as close as possible to the boiler (Fig. 1-11),
or ideally via connection 'C' .
Filling is performed at low speed to ensure release
of air bubbles in the water via the boiler and
heating system vents.
The boiler has a built-in automatic venting valve
on the circulator. Check if the cap is loose. Open
the radiator air vent valves.
Close radiator vent valves when only water
escapes from them.
Close the filling valve when the boiler manometer
indicates approx. 1.2 bar.
N.B.: during these operations, turn on the cir-
culating pump at intervals by means of the main
selector switch on the control panel. Vent the
circulation pump by loosening the front cap and
keeping the motor running. Only open for a few
seconds at a time.
In presence of the automatic filling, the auto fill
valve must necessarily be isolated after system
is pressurized.
Head available to the system (INTEC 12).
C
A
B
D
Head available to the system (INTEC 30).
C
B
D

1.10 GAS SYSTEM START-UP.

To start up the system, make reference to the
Standard: This divides the systems and therefore
the start-up operations into three categories: new
systems, modified systems, re-activated systems.
In particular, for new gas systems:
- open windows and doors;
- avoid presence of sparks or naked flames;
- bleed all air from pipelines;
- check that the internal system is properly sealed
according to specifications.

1.11 BOILER START UP (IGNITION).

For first ignition, the following must be
performed:
- check that the internal system is properly sealed
according to specifications;
- ensure that the type of gas used corresponds
to boiler settings;
- switch the boiler on and ensure correct
ignition;
- make sure that the gas flow rate and relevant
pressure values comply with those given in the
manual;
- ensure that the safety device is engaged in the
event of gas supply failure and check activation
time;
Flow rate (l/h)
A
Flow rate (l/h)
9
- check activation of the master switch located
upstream from the boiler and in the boiler;
- check that the intake/exhaust concentric
terminal (if fitted) is not blocked.
The boiler must not be started up even if only
one of the checks should be negative.
N.B.: the boiler preliminary check must be carried
out by a qualified technician. The conventional
boiler warranty is valid as of the date of testing if
not commissioned by a qualified technician.

1.12 CIRCULATION PUMP.

The "INTEC 12-30 SYSTEM EXTERNAL" series
boilers are supplied with a built-in circulation
pump with 3-position electric speed control.
The boiler does not operate correctly with the
circulation pump on speed one. To ensure
optimal boiler operation, in the case of new
system it is recommended to use the pump at
maximum speed, position 3.
Pump release. If, after a prolonged period of
inactivity, the circulation pump is blocked,
unscrew the front cap and turn the motor shaft
using a screwdriver. Take great care during this
operation to avoid damage to the motor.
A = Head available to the system at maxi-
mum speed with by-pass closed.
B = Head available to the system at maxi-
mum speed with by-pass open.
C = Head available to the system at second
speed with by-pass closed.
D = Head available to the system at second
speed with by-pass open.
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