Immergas INTEC 12 System External User Manual

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1-10
B
C
D
A
B
C
D
A
INSTALLERUSER
MAINTENANCE TECHNICIAN
- check activation of the master switch located
upstream from the boiler and in the boiler;
- check that the intake/exhaust concentric
terminal (if tted) is not blocked.
e 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 qualied technician. e conventional
boiler warranty is valid as of the date of testing if
not commissioned by a qualied technician.
1.12 CIRCULATION PUMP.
e “INTEC 12-30 SYSTEM EXTERNAL” series
boilers are supplied with a built-in circulation
pump with 3-position electric speed control.
e 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, aer a prolonged period of
inactivity, the circulation pump is blocked,
unscrew the front cap and turn the motor sha
using a screwdriver. Take great care during this
operation to avoid damage to the motor.
1.9 SYSTEM FILLING.
Once the boiler is connected, proceed with
system lling through the arranged lling 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.
e 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 lling 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 lling, the auto ll
valve must necessarily be isolated aer system
is pressurized.
1.10 GAS SYSTEM STARTUP.
To start up the system, make reference to the
Standard: is divides the systems and therefore
the start-up operations into three categories: new
systems, modied systems, re-activated systems.
In particular, for new gas systems:
- open windows and doors;
- avoid presence of sparks or naked ames;
- bleed all air from pipelines;
- check that the internal system is properly sealed
according to specications.
1.11 BOILER START UP IGNITION.
For first ignition, the following must be
performed:
- check that the internal system is properly sealed
according to specications;
- ensure that the type of gas used corresponds
to boiler settings;
- switch the boiler on and ensure correct
ignition;
- make sure that the gas ow 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 = 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.
Head (m H
2
O)
Head (kPa)
Head available to the system (INTEC 12).
Head available to the system (INTEC 30).
Flow rate (l/h)
Head (m H
2
O)
Head (kPa)

Immergas INTEC 12 System External Specifications

General

Brand	Immergas
Model	INTEC 12 System External
Category	Boiler
Language	English