2. Installation
2.1 General Instructions
BOILER INSTALLATION MUST ONLY BE PERFORMED BY QUALIFIED PERSONNEL, IN AC-
CORDANCE WITH ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL MANUAL, THE
PROVISIONS OF CURRENT LAW, THE PRESCRIPTIONS OF NATIONAL AND LOCAL STAN-
DARDS AND THE RULES OF PROPER WORKMANSHIP.
2.2 Place of installation
The combustion circuit is sealed with respect to the
B
place of installation and therefore the unit can be in-
stalled in any room except in a garage. The place of in-
stallation must be sufficiently ventilated to prevent
the creation of dangerous conditions in case of even
small gas leaks. Otherwise there may be risk of suffo-
cation and intoxication or explosion and fire. This sa-
fety requirement is set by EEC Directive no. 2009/142
for all units that use gas (including so-called sealed
chamber units).
The unit is suitable for operation in a partially protected place (see "Installation in a partially pro-
tected place" on page 261).
The place of installation must be free of dusts, flammable materials or objects, or corrosive gases.
The boiler is arranged for wall mounting and comes as standard with a hooking bracket. Wall fixing
must ensure stable and effective support for the generator.
If the unit is enclosed in a cabinet or mounted alongside, there must be sufficient space
A
for removing the casing and for normal maintenance activities
2.3 Plumbing connections
Important
The safety valve outlet must be connected to a funnel or
B
collection pipe to prevent water spurting onto the floor in
case of overpressure in the heating circuit. Otherwise, if
the discharge valve cuts in and floods the room, the boiler
manufacturer cannot be held liable.
Before installation, flush all the pipes of the system thorou-
B
ghly to remove any residuals or impurities that could affect
proper operation of the unit.
In case of replacement of generators in existing installa-
tions, the system must be completely emptied and clea-
ned of any sludge and pollutants. For that purpose only
use suitable guaranteed products for heating systems
(see next section), that do not harm metals, plastics or
246
EN
cod. 3540000251 - Rev. 00 - 03/2024
ALHENA C