Immergas NIKE MINI 28 KW SPECIAL, Инструкция и буклет предупреждений

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1.9 SYSTEM FILLING.
Once the boiler is connected, proceed with
system filling via the filling valve (Fig. 2-2).
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.
Open the radiator vent valves. Close radiator
vent valves when only water escapes from them.
Close the filling valve when the boiler pressure
gauge indicates approx. 1.2 bar.
N.B.:
during these operations start up the
circulation pump at intervals, acting on the main
switch positioned on the control panel. Vent the
circulation pump by loosening the front cap and
keeping the motor running.
Tighten the cap after the operation.
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 open flames;
- bleed all air from the pipelines;
- check that the internal system is properly sealed
according to specifications.
1.11 BOILER START-UP (IGNITION).
To issue the required Declaration of Conformity,
the following must be performed for boiler
start-up:
- check that the internal system is properly sealed
according to the regulations in force;
- make sure that the type of gas used corresponds
to boiler settings;
- switch the boiler on and check correct ignition;
- make sure that the gas flow rate and relevant
pressure values comply with those given in the
manual (par. 3.16);
- check the correct ventilation of the rooms;
- check the existing draught during normal
functioning of the appliance, e.g. a draught
gauge positioned at the exit of the appliance
combustion products;
- check that there is no backflow of combustion
products into the room, even during
functioning of fans;
- ensure that the safety device intervenes in the
event of gas supply failure and check the relative
intervention time;
- check activation of the main switch located
upstream of the boiler.
The boiler must not be started up even if only
one of the checks should be negative.
N.B.: The preliminary boiler check must be carried
out by a qualified technician. The standard boiler
warranty is valid from the date of inspection.
The test certificate and warranty is issued to the
user.
Fig. 1-7
Head available to the system.
1.12 CIRCULATION PUMP.
The 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 first speed.
To ensure optimal boiler operation, in the case
of new systems (single pipe and module) it is
recommended to use the pump at maximum
speed. The circulation pump is already fitted
with a capacitor.
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.
1.13 KITS AVAILABLE ON REQUEST.
• System cut-off valves kit (on request). The
boiler is designed for installation of system
interception cocks to be placed on flow and
return pipes of the connection assembly. This
kit is particularly useful for maintenance as
it allows the boiler to be drained separately
without having to empty the entire system.
• Zone system kit (on request). If the heating
system is to be divided into several zones
(max.
three), in order to interlock them with separate
adjustments and to keep water flow rate high
for each zone, Immergas supplies zone system
kits by request.
• Polyphosphate dispenser kit (on request).
The polyphosphate dispenser reduces the
formation of lime-scale and preserves the
original heat exchange and domestic hot water
production conditions. The boiler is prepared
for application of the polyphosphate dispenser
kit.
The above-mentioned kits are supplied complete
with instructions for assembly and use.
H
ea
d (m H
2
O)
A = Head available to the plant at the third speed (with automatic by-pass)
B = Head available to the plant at the second speed (with automatic by-pass)
Flow rate (l/h)
H
ea
d (kP
a)
A
B