19
1- 30
INS
TALLER
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MAINTEN
AN
CE TECHNI
CI
AN
Key:
1 - Sample points (air A) - (flue gas F)
2 - Sealed Chamber
3 - Fan
4 - Combustion chamber
5 - Domestic hot water flow switch
6 - Gas valve
7 - Domestic hot water probe
8 - System filling valve
9 - Positive signal pressure point
10 - Negative signal pressure point
11 - Flue pressure switch
12 - Delivery probe
13 - Flue hood
14 - Safety thermostat
15 - Primary heat exchanger
16 - Ignition and detection electrodes
17 - System expansion vessel
18 - Aqua Celeris
19 - Burner
1.17 KITS AVAILABLE ON REQUEST.
• System shut off valves kit. The boiler is designed
for installation of system interception cocks
to be placed on flow and return pipes of the
connection assembly. This 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 central he-
ating system is to be divided into several zones
(
max. three)
in order to interlock them with
separate adjustments and to keep water flow
rate high for each zone, Immergas supplies zone
system kits on request.
• Polyphosphate dispenser kit. The polyphosphate
dispenser reduces the formation of lime-scale
and preserves the original heat exchange and
domestic hot water production conditions.
The boiler is prepared for application of the
polyphosphate dispenser kit.
• Cover kit. For outdoor installations, in partially
protected areas and with direct air intake, the
top protection cover must be fitted for a correct
functioning of the boiler and to protect it from
storms (Fig. 1-5). For indoor installations, type
B configuration, a suitable top protection cover
coupled with the flue exhaust kit must be fitted.
• 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
fitted from the relative cable and from a control
thermostat.
The above-mentioned kits are supplied complete
with instructions for assembly and use.
1.18 BOILER COMPONENTS.
20 - System pressure switch
21 - Vent valve
22 - Boiler pump
23 - Plate heat exchanger
24 - Three-way valve (motorised)
25 - System draining valve
26 - By-pass
27 - 3 bar safety valve
N.B.: connection group (optional)
