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QUADRIFOGLIO

Table. 1

Plumbing system pressure adjustment

The filling pressure with the system cold must be approx. 1.0 bar. If the system pressure
falls to values below minimum, the boiler card will activate fault F37 (fig. 14).

fig. 14 - Low system pressure fault

Once the system pressure is restored, the boiler will activate the 120-second
air venting cycle indicated on the display by FH.

3. INSTALLATION
3.1 General Instructions

THE BOILER MUST ONLY BE INSTALLED BY QUALIFIED PERSONNEL, IN COMPLI-
ANCE WITH ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL MANUAL, THE
PROVISIONS OF CURRENT LAW, THE NATIONAL AND LOCAL REGULATIONS,
AND THE RULES OF PROPER WORKMANSHIP.

QUADRIFOGLIO

is a heat generator arranged to operate alone or in cascade (bank).

The boiler's electronics can in any case manage a cascade of

up to 6 modules

. To cre-

ate systems in cascade it is necessary to have suitably sized water / gas manifolds com-
plete with all the safety devices required by the current regulations, as well as single
fume exhausts or fume manifolds in low pressure (not supplied) installed by a qualified
technician.
When two or more generators QUADRIFOGLIO are installed in cascade, respecting the
instructions given in this manual, they can be considered as a single equivalent heat gen-
erator with a total capacity equal to the sum of powers of all the units connected cascade.
All the requirements of the current standards and regulations applicable to this “equiva-
lent” generator with total heating capacity must be met. In particular the place of instal-
lation, safety devices and fume exhaust system must be adequate for the total heating
capacity of the bank of units.
In fact, each QUADRIFOGLIO is a complete and independent heat generator, equipped
with its own safety devices. In the event of over-temperature, a lack of water or of circu-
lation in the unit, the protection devices cause the unit to switch off or shut down, pre-
venting it from working.
The installation instructions given in the following paragraphs concern both single units
and connection in cascade.

3.2 Place of installation

The generator must be installed in an appropriate room with ventilation openings towards
the outside in conformity with the current regulations. If there are several burners or ex-
hausters that can work together in the same room, the ventilation openings must be
sized for simultaneous operation of all the units. The place of installation must be free of
flammable materials or objects, corrosive gases, powders or volatile substances. The
room must be dry and not exposed to rain, snow or frost. For positioning, leave sufficient
room around the unit for normal maintenance operations. In particular, check that the
burner door can open freely.

3.3 Plumbing connections

The heating capacity of the unit must be previously established by calculating the build-
ing's heat requirement according to the current regulations. The system must be provid-
ed with all the components for correct and regular operation. In particular, provide for all
the protection and safety devices required by the current regulations for the complete
modular generator. They must be installed on the hot water circuit delivery piping, imme-
diately after the last module, within a distance of not more than 0.5 metres, with no shut-
off devices in between.

The unit is not supplied with an expansion tank or safety

valve, their connection must therefore be carried out by the Installer

The safety valve outlet must be connected to a funnel or collection pipe to pre-
vent 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 manu-
facturer cannot be held liable.
Do not use the water system pipes to earth electrical appliances.

Before installation, carefully flush all the pipes of the system to remove
residues or impurities that could affect the proper operation of the unit.

Use chemical conditioners that are suitable for the purpose; i.e. able to remove
from the walls and bottom of the pipes and the various components of the sys-
tem, sludge, metal oxides and, in low temperature systems, also biomass, with
just the circulation of the water, with system hot and/or cold. The products used
must not be corrosive and/or aggressive for metals and plastics and must not
significantly alter the natural pH of the water.

Also, a filter must be installed on the system return piping to prevent impurities
or sludge from the system clogging and damaging the heat generators.
The filter must be installed when replacing generators in existing systems. The
manufacturer declines any liability for damage caused to the generator by fail-
ure to install or inadequate installation of this filter.

Carry out the relevant connections according to the diagram in sec. 5.1and the symbols
given on the unit.

In case of installation in bank, the hydraulic circuit of each boiler must be fitted with a mo-
tor-operated shutoff valve (controlled by the unit, see wiring diagram fig. 55) that pre-
vents reverse circulation with the boiler not working.
The following optional kits are available for this purpose:

052000X0

- MOTOR-OPERATED BUTTERFLY VALVE

DN50

052001X0

- MOTOR-OPERATED BUTTERFLY VALVE

DN65

If the distribution system adjustment is independent from the electronics of the
generators it is advisable to create a bypass between the delivery manifold and the
system return to protect the circulating pumps.
Characteristics of the water system

The boilers

QUADRIFOGLIO

are suitable for installation in heating systems with

non-

significant entry of oxygen

(ref. systems

"case I"

Standard EN14868).

A separator

must be provided

in systems with continuous entry of oxygen (e.g. underfloor systems

without antidiffusion pipes), or intermittent (e.g. in case of frequent replenishments).
The water inside a heating system must meet the characteristics given by Standard UNI
8065 and the provisions of Standard EN 14688 (protection of metallic materials against
corrosion) must be complied with.
The filling water (first filling and subsequent replenishment) must be clear, with hardness
below 15°F and treated with suitable chemical conditioners against the initiation of cor-
rosion, that are not aggressive on metals and plastics, do not develop gases and, in low-
temperature systems, do not cause proliferation of bacterial or microbial masses. In case
of hardness above 15 °F suitable softening treatment and/or the use of suitable anti-foul-
ing agents must be provided for.
The water contained in the system must be periodically checked (at least twice a year
during the season when the systems are used, as required by UNI8065) and have: pos-
sibly a clear appearance, a pH above 7 and below 8.5, an iron content (Fe) below 0.5
mg/l, a copper content (Cu) below 0.1 mg/l, a chloride content below 50mg/l, and must
contain chemical conditioners in a concentration sufficient to protect the system for at
least one year. Bacterial or microbial loads must not be present in systems at low tem-
perature.

Conditioners, additives, inhibitors and antifreeze liquids can be used only and
exclusively if the producer guarantees their suitability for use in heating sys-
tems and that they do not cause damage to the boiler's heat exchanger or other
components and/or materials of the boiler and system. The use of generic
chemicals not specific for use in heating systems and/or incompatible with the
materials of the boiler and system is forbidden. Chemical conditioners must en-
sure complete deoxygenation of the water, must contain specific protection for
yellow metals (copper and its alloys), anti-fouling agents for scale at least up to
15°F, neutral pH stabilisers and, in low-temperature systems, specific biocides
for use in heating systems.

Heating temperature adjustment

Adjustment can be made from the Remote Timer Control menu and the boiler
control panel.

DHW temperature adjustment
(with optional hot water tank
installed)

Adjustment can be made from the Remote Timer Control menu and the boiler
control panel.

Summer/Winter Switchover

Summer mode has priority over a possible Remote Timer Control heating
demand.

Eco/Comfort selection

(with

optional hot water tank installed)

On disabling DHW from the Remote Timer Control menu, the boiler selects the
Economy mode. In this condition, the button detail 7 -fig. 1 on the boiler panel is
disabled.
On enabling DHW from the Remote Timer Control menu, the boiler selects the
Comfort mode. In this condition it is possible select one of the two modes with
the button detail 7 -fig. 1.

Sliding Temperature

Both the Remote Timer Control and the boiler card manage Sliding Tempera-
ture adjustment: of the two, the Sliding Temperature of the boiler card has prior-
ity.

reset

eco

comfort

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