ALPA 31 BS 60
20
EN
cod. 3541B530 - 01/2012 (Rev. 00)
2. INSTALLATION
2.1 General Instructions
BOILER INSTALLATION MUST ONLY BE PERFORMED BY QUALIFIED PERSON-
NEL, IN ACCORDANCE WITH ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL
MANUAL, THE PROVISIONS OF CURRENT LAW, THE PRESCRIPTIONS OF NA-
TIONAL AND LOCAL STANDARDS AND THE RULES OF PROPER WORKMANSHIP.
2.2 Place of installation
The combustion circuit is sealed with respect to the place of installation, therefore the
unit can be installed in any room. However, the place of installation must be adequately
ventilated to prevent the creation of dangerous conditions even in case of small gas
leaks. This safety standard is required by EEC Directive no. 90/396 for all gas units, in-
cluding those with a so-called sealed chamber.
Therefore the place of installation must be free of dust, flammable materials or objects
or corrosive gases.
A
If the unit is enclosed in a cabinet or mounted alongside, a space must be pro-
vided for removing the casing and for normal maintenance operations.
2.3 Plumbing connections
The heating capacity of the unit must be previously established by calculating the build-
ing's heat requirement according to current regulations. The system must be provided
with all the components for correct and regular operation. It is advisable to install on-off
valves between the boiler and heating system allowing the boiler to be isolated from the
system if necessary.
B
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 wash all the pipes of the system to remove any residuals or
impurities that could affect proper operation of the unit.
Carry out the relevant connections according to the diagram on sec. 4.1 and the symbols
given on the unit.
System water charcteristics
In the presence of water harder than 25° Fr (1°F = 10ppm CaCO
3
), the use of suitably
treated water is advisable in order to avoid possible scaling in the boiler. The treatment
must not in any case reduce the hardness to values below 15°F (Decree 236/88 for uses
of water intended for human consumption). Water treatment is indispensable in the case
of very large systems or with frequent replenishing of water in the system. If partial or
total emptying of the system becomes necessary in these cases, it is advisable to refill it
with treated water.
Antifreeze system, antifreeze fluids, additives and inhibitors
The boiler is equipped with an antifreeze system that turns on the boiler in heating mode
when the system delivery water temperature falls under 6°C. The device will not come
on if the electricity and/or gas supply to the unit are cut off. If it becomes necessary, it is
permissible to use antifreeze fluid, additives and inhibitors only if the manufacturer of
these fluids or additives guarantees they are suitable for this use and cause no damage
to the heat exchanger or other components and/or materials of the boiler unit and sys-
tem. It is prohibited to use generic antifreeze fluid, additives or inhibitors that are not ex-
pressly suited for use in heating systems and compatible with the materials of the boiler
unit and system.
2.4 Gas connection
B
Before making the connection, ensure that the unit is arranged for operation
with the type of fuel available and carefully clean all the pipes of the gas system
to remove any residues that could affect good functioning of the boiler.
The gas must be connected to the relative connector (see fig. ) in conformity with current
standards, with rigid metal pipes or with continuous flexible s/steel wall tubing, placing a
gas cock between the system and the boiler. Make sure that all the gas connections are
tight. The capacity of the gas meter must be sufficient for the simultaneous use of all
equipment connected to it. The diameter of the gas pipe leaving the boiler does not de-
termine the diameter of the pipe between the unit and the meter; it must be chosen ac-
cording to its length and loss of head, in conformity with current standards.
B
Do not use the gas pipes to earth electrical appliances.
2.5 Electrical connections
Connection to the electrical grid
B
The unit's electrical safety is only guaranteed when correctly connected to an efficient
earthing system executed according to current safety standards. Have the efficiency and
suitability of the earthing system checked by professionally qualified personnel. The
manufacturer is not responsible for any damage caused by failure to earth the system.
Also make sure that the electrical system is adequate for the maximum power absorbed
by the unit, as specified on the boiler dataplate.
The boiler is prewired and provided with a Y-cable and plug for connection to the electricity line.
The connections to the grid must be made with a permanent connection and equipped with a bi-
polar switch whose contacts have a minimum opening of at least 3 mm, interposing fuses of max.
3A between the boiler and the line. It is important to respect the polarities (LINE: brown wire / NEU-
TRAL: blue wire / EARTH: yellow-green wire) in making connections to the electrical line. During
installation or when changing the power cable, the earth wire must be left 2 cm longer than the
others.
B
The user must never change the unit's power cable. If the cable gets damaged, switch
off the unit and have it changed solely by professionally qualified personnel. If changing
the electric power cable, use solely
“HAR H05 VV-F”
3x0.75 mm2 cable with a maxi-
mum outside diameter of 8 mm.
Room thermostat (optional)
B
IMPORTANT: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE CON-
TACTS. CONNECTING 230 V TO THE ROOM THERMOSTAT TERMINALS WILL
PERMANENTLY DAMAGE THE ELECTRONIC BOARD.
When connecting time controls or a timer, do not take the power supply for these devices
from their breaking contacts Their power supply must be by means of direct connection
from the mains or with batteries, depending on the kind of device.
Accessing the electrical terminal block
To access the terminal block it is necessary to lift the boiler cover
“A”
, undo the two
screws
“B”
and remove the door
“C”
.
fig. 17 - Accessing the terminal block
2.6 Air/fume ducts
Warnings
The unit is “type C” with an airtight chamber and forced draught, the air inlet and fume outlet must
be connected to one of the following extraction/suction systems. The unit is type-approved to work
with all the Cxy flue configurations stated on the technical data plate (some setups are given by
way of example in this chapter). It is however possible that some setups are expressly limited or
not permitted by law, standards or local regulations. Before proceeding with installation, check and
meticulously observe the above-mentioned prescriptions. In addition, comply with the provisions
concerning the positioning of wall and/or roof end pieces and the minimum distances from win-
dows, walls, ventilation openings, etc.
B
This C-type unit must be installed using the fume extraction and outlet ducts supplied by
the manufacturer in accordance with UNI-CIG 7129/92. Failure to use them automatical-
ly forfeits all warranty and liability of the manufacturer.
Expansion
A
For fume ducts longer than one metre, in the phase of installation it is necessary to take
account of the natural expansion of the materials during operation.
To prevent buckling leave an expansion gap of approximately 2 -- 4 mm for each metre
of ducting.
fig. 18 - Expansion
A
C
B
B
2 ÷ 4 mm
Summary of Contents for ALPA 31 BS 60
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