Boiler Shutdown; Restore Central Heating System Pressure; Draining The System; Draining The Domestic Hot Water Circuit - Immergas VICTRIX EXA 28 1 ERP Instruction Booklet And Warning

2.7 BOILER SHUTDOWN.

Switch the boiler off by putting it in "off " mode, disconnect the
onmipolar switch outside of the boiler and close the gas cock
upstream from the appliance. Never leave the boiler switched on
if left unused for prolonged periods.

2.8 RESTORE CENTRAL HEATING SYSTEM PRESSURE.

Periodically check the system water pressure. The boiler pressure
gauge should read a value of between 1 and 1.2 bar.
If pressure falls below 1 bar (with the circuit cold), restore normal
pressure via the cock located at the bottom of the boiler (Part. 1
Fig. 4).
N.B.: close the cock after the operation.
If pressure values reach around 3 bar the safety valve may be
activated.
In this case, remove water from a radiator air vent valve until a
pressure of 1 bar is achieved, or ask for assistance from profes-
sionally qualified personnel.
In the event of frequent pressure drops, contact qualified staff for
assistance to eliminate the possible system leakage.

2.9 DRAINING THE SYSTEM.

To drain the boiler, use the special draining valve (Fig. 4).
Before draining, ensure that the filling cock is closed.
ATTENTION:
if glycol was input in the system's circuit,
make sure it is discharged into the waste
water system, pursuant to regulation EN 1717.
2.10 DRAINING THE DOMESTIC HOT WATER
CIRCUIT.
To do this, always close the domestic cold water inlet upstream
of the appliance.
Open any domestic hot water tap to discharge the pressure from
the circuit.
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2.11 ANTIFREEZE PROTECTION.

The boiler has an antifreeze function that switches the burner on
automatically when the temperature falls below 4°C (standard
protection to minimum temperature of -5°C). All information
relative to the antifreeze protection is stated in (Par. 1.4). In order
to guarantee the integrity of the appliance and the domestic hot
water heating system in zones where the temperature falls below
zero, we recommend the central heating system is protected using
anti-freeze liquid and installation of the Immergas Antifreeze Kit
in the boiler. In the case of prolonged inactivity (second case), we
also recommend that:
- the electric power supply is disconnected;
- the heating circuit and boiler domestic water circuit must be
drained. In systems that are drained frequently, filling must be
carried out with suitably treated water to eliminate hardness that
can cause lime-scale.

2.12 CLEANING THE CASE.

Use damp cloths and neutral detergent to clean the boiler casing.
Never use abrasive or powder detergents.

2.13 DECOMMISSIONING.

In the event of permanent shutdown of the boiler, contact profes-
sional staff for the procedures and ensure that the electrical, water
and gas supply lines are shut off and disconnected.
2.14 GAS SYSTEM NOT USED FOR PERIODS OVER 12
MONTHS.
The current regulation provides that gas systems not used for
over 12 months must be checked prior to being used again, as per
regulations in force, by professionally qualified staff.
If the inspection is successful, the boiler can be recommissioned
according to the instructions specified in point 3 herein.