Immergas ZEUS 24 - Page 18

3-1
INSTALLATORUSERMAINTENANCE
18 - IE
3
BOILER COMMISSIONING
INITIAL CHECK
To commission the boiler:
- ensure that the declaration of conformity of
installation is supplied with the appliance;
- ensure that the type of gas used corresponds to
boiler settings;
- check connection to a 230V-50Hz power
mains, correct L-N polarity and the earthing
connection;
- make sure the heating system is lled with
water and that the manometer indicates a
pressure of 1 - 1.2 bar;
- make sure the air valve cap is open and that the
system is well deaerated;
- switch the boiler on and ensure correct ignition;
- make sure the gas maximum, medium and
minimum flow rate and pressure values
correspond to those given in the handbook
(Para. 3.16);
- check activation of the safety device in the event
of no gas, as well as the relative activation time;
- check activation of the master switch located
upstream from the boiler and in the boiler;
- check that the intake and/or exhaust terminals
are not blocked;
- check activation of the “no air” safety pressure
switch;
- ensure activation of all adjustment devices;
- seal the gas ow rate regulation devices (if
settings are modied);
- ensure production of hot domestic water;
- ensure sealing eciency of water circuits;
- check ventilation and/or aeration of the
installation room where provided.
If any checks/inspection give negative results, do
not start the boiler.
3.1 PLUMBING LAYOUT.
Key:
1 - Gas valve
2 - Stainless steel coil for boiler
3 - Magnesium anode
4 - Stainless steel boiler
5 - Air bleeding valve
6 - Burner
7 - Combustion chamber
8 - Primary heat exchanger
9 - Fumes hood
10 - Fan
11 - Fumes pressure switch
12 - Sealed chamber
13 - Delivery probe
14 - Safety thermostat
15 - System expansion tank
16 - Boiler circulating pump
17 - Adjustable by-pass
18 - System drain cock
19 - 3-way valve (motorised)
20 - Domestic water probe
21 - 3 bar safety valve
22 - System lling cock
23 - 8 bar safety valve
24 - Cold water inlet non-return valve
25 - Boiler drain cock
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic cold water inlet
R - System return
M - System delivery