System Filling; Filling The Condensate Drain Trap; Gas System Start-Up; Boiler Start-Up (Ignition) - Immergas Victrix Tera 28 1 Instructions And Warnings

1.25 SYSTEM FILLING.

Once the boiler is connected, proceed with system filling via the
filling cock (Part. 26 Fig. 36). Filling is performed at low speed to
ensure release of air bubbles in the water via the boiler and central
heating system vents.
The boiler has a built-in automatic vent valve on the pump. Check if the
cap is loose. Then 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, enable the automatic vent functions
on the boiler (active on first ignition).

1.26 FILLING THE CONDENSATE DRAIN TRAP.

On first lighting of the boiler, flue gas may come out the conden-
sate drain; after a few minutes' operation check that this no longer
occurs. This means that the drain trap is filled with condensate to
the correct level preventing the passage of flue gas.

1.27 GAS SYSTEM START-UP.

To start up the system, refer to the technical standard in force.
In particular, for new gas systems:
- open windows and doors;
- avoid presence of sparks or naked flames;
- bleed all air from the pipelines;
- check that the internal system is properly sealed according to
the specifications set forth by technical regulations in force.

1.28 BOILER START-UP (IGNITION).

To commission the boiler (the operations listed below must only be
performed by qualified personnel and in the presence of staff only):
- check that the internal system is properly sealed according to
the regulations in force;
- ensure that the type of gas used corresponds to the boiler settings
(the type of gas appears on the display on first electrical power
supply, or by checking the relative parameter "G");
- check connection to a 230V-50Hz power mains, correct L-N
polarity and the earthing connection;
- check that there are no external factors that may cause the
formation of fuel pockets;
- 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 (Par. 4.1 - 4.4);
- ensure that the safety device intervenes in the event of gas supply
failure and check the relative intervention time;
- check the intervention of the main switch located upstream from
the boiler and in the boiler;
- check that the intake and/or exhaust terminals (if fitted) are not
blocked.
- Carry out the flue test.
The system must not be started up if even only one of the checks
should be negative.
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1.29 CIRCULATION PUMP.

The boilers are supplied with a variable speed circulator pump.
In the central heating mode, the following operating modes are
available and can be selected from the "P.C.B. programming"
menu.
N.B.: the ∆T(A3) can be controlled compatibly with the charac-
teristics of the central heating system and of the boiler.
•Proportional head (A3 = 0): the circulator speed varies according
to the power emitted by the burner, the greater the power the
greater the speed.
• ∆T Constant (A3 = 5 - 25 K): the pump speed varies to maintain
the ∆T constant between the system flow and return according
to set value K (A3 = 15 Default).
• Fixed: by setting parameters "A1" and "A2" at the same value
(5/6 - 9), the pump operates at constant speed. For the boiler
to work properly, it is not allowed to drop below the minimum
value indicated above.
In domestic hot water mode, the circulator pump always runs at
full speed.
Pump release. If, after a prolonged period of inactivity, the circu-
lation pump is blocked, turn the motor shaft using a screwdriver.
Take great care during this operation to avoid damage to the motor.
Bypass Regulation (Part. 23 Fig.36). The boiler leaves the factory
with the bypass open.
If necessary, the bypass can be regulated to system requirements
from minimum (bypass closed) to maximum (bypass open). Ad-
just using a flat-head screwdriver. Turning clockwise opens the
bypass and anticlockwise closes it.
N.B.: the bypass ensures minimum circulation of the water in the
boiler and correct operation of the appliance if the systems are
divided into more than one zone.