Immergas MAIOR EOLO - Page 19

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INSTALLERUSERMAINTENANCE TECHNICIAN
1.23 BOILER COMPONENTS.
1.22 KITS AVAILABLE ON REQUEST.
• System shut o valves kit. e boiler is designed
for installation of system interception cocks
to be placed on ow and return pipes of the
connection assembly. is kit is particularly
useful for maintenance as it allows the boiler to
be drained separately without having to empty
the entire system.
• System zone control unit Kit. If the heating
system is to be divided into several zones (max.
three), in order to interlock them with separate
adjustments and to keep water ow rate high
for each zone, Immergas supplies zone system
kits by request.
• Polyphosphate dispenser kit. e polyphos-
phate dispenser reduces the formation of lime-
scale and preserves the original heat exchange
and domestic hot water production conditions.
e boiler is prepared for application of the
polyphosphate dispenser kit.
• Cover kit. If installed outdoors in a partially
sheltered place with direct air intake, it is
compulsory to mount the appropriate top
protection cover for the correct functioning of
the water heater and to protect it from adverse
weather conditions (Fig. 1-6); or, if installed
indoors in conguration type B, it is compul-
sory to mount the appropriate top protection
cover along with the ue exhaust kit.
• Anti freeze kit with resistance (on request). If
the boiler is installed in a place where the tem-
perature falls below -5°C and in the event there
is no gas, the appliance can freeze. To prevent
freezing of the domestic hot water system, an
anti freeze kit with an electrical resistance can
be tted from the relative cable and from a
control thermostat.
e above-mentioned kits are supplied complete
with instructions for assembly and use.
Key:
1 - Sample points (air A) - (ue gas F)
2 - Sealed Chamber
3 - Fan
4 - Combustion chamber
5 - Domestic hot water ow switch
6 - Gas valve
7 - Domestic hot water probe
8 - System lling valve
9 - Positive signal pressure point
10 - Negative signal pressure point
11 - Flue pressure switch
12 - Flow probe
13 - Fumes hood
14 - Safety thermostat
15 - Primary heat exchanger
16 - Ignition and detection electrodes
17 - System expansion vessel
18 - Burner
19 - System pressure switch
20 - Vent valve
21 - Boiler circulator pump
22 - Plate heat exchanger
23 - ree-way valve (motorised)
24 - System draining valve
25 - By-pass
26 - 3 bar safety valve
STD.002998/004