Principle Diagram - System For Central Heating And The Production Of Domestic Hot Water; Commissioning; Preliminary Checks; Starting For The First Time - Lamborghini Caloreclima PREX H3 LN Notice Technique

8. PRINCIPLE DIAGRAM - SYSTEM FOR
CENTRAL HEATING AND THE PRODUCTION
OF DOMESTIC HOT WATER (Fig. 16)
The choice and installation of the components
making up the system is left to the expertise of
the installer, who must operate in a workmanlike
manner and according to the legislation in force.
The systems loaded with antifreeze require the
use of water disconnecting devices. It should be
stressed that the diagram in Fig. 16 is a princi-
ple diagram. In the case of different systems,
please contact our After-Sales Service, which
will provide you all the details required.

9. COMMISSIONING

9.1 Preliminary checks

Once having completed the water, electrical and
fuel connections to the boiler, before starting,
check that:
- The expansion vessel and the safety valve (if
required) are connected correctly and cannot
be shut-off.
- The bulbs of the thermostats and the thermo-
meter are secured inside the corresponding
sheaths.
- The turbulators are positioned in all the flues.
- The system is filled with water and completely
vented of air.
- The pump or the pumps are working properly.
- The water, electrical, safety device and fuel
connections have been performed in com-
pliance with the national and local legislation
in force.
- The burner is installed according to the
instructions contained in the manual provided
by the manufacturer.
- The mains voltage and frequency are compati-
ble with the rating of the burner and the boi-
ler's electrical equipment.
- The system is able to absorb the quantity of
heat that will be produced.
- The recirculating pump is installed, as descri-
bed in par. 5.5.5.
Key
A Central heating flow outlet
B Central heating return inlet
1 Heat generator
2 Burner complete with shutdown
and control valves
3 Storage heater
4 System manifolds
5 On-off valves
6 Circulating pump
7 Non-return valves
8 System expansion vessel
9 Automatic vent valve
10 Safety valve
11 Softener filter
12 System fill

9.2 Starting for the first time

After the positive outcome of the checks descri-
bed in the previous paragraph, the burner can
be ignited for the first time; this operation must
be performed by a technician who has been
authorised by the Manufacturer of the burner.
The technician has full responsibility as regards
the field of calibration, within the declared and
approved output range of the boiler. After having
opened the fuel on-off cocks and checked that
there are no leaks in the supply line, place all
the switches on the ON position. The burner will
thus be ready for first ignition and for the adjust-
ments to be made by the authorised technician.
On first ignition, check that the door, the burner
flange and the connections to the chimney are
tight and that there is a slight negative pressure
at the base of the flue. The fuel rate must corre-
spond to the boiler's rated data and under no
circumstances must exceed the maximum out-
put value declared. The temperature of the flue
gas must never fall below 160°C.
- 20 -
13 Fuel on-off valve
14 Gas pressure stabiliser
15 Manual on-off valve
16 Gas filter
17 Vibration-damping joint
18 Pump
19 Pressure gauge
20 Safety thermostat
21 Control thermostat
22 Three-way cock
23 Pressure switch with manual reset
24 Flow switch
25 Control thermostat
26 Thermostat with manual reset
27 Temperature test socket
28 Temperature control valve

9.3 Shutting down the boiler

- Set the temperature controller to the minimum.
- Disconnect power from the burner and close
the fuel supply.
- Let the pumps operate until they are stopped
by the temperature controller.
- Disconnect power from the electrical panel.