ICI - Innovative Creations, Inc. AX - Manual (Page 11)

INSTALLATION
9
3.3 ELECTRIC CONNECTIONS
The boilers are provided with a switchboard (protection level IP 55) completely assembled to the various
boiler accessories. Before connecting the switchboard, make sure that the electric system has been
correctly installed, checking in particular the efficiency of the earthing system.
Wiring diagram
Refer to the diagram supplied with the specific switchboard.
3.4 SMOKESTACK
The connection from the boiler to the base of the smokestack must slope upwards in the direction of the gas
flow, with a slope that should be at least 10%. The path should be as short and as possible and the bends
and connections designed as to the rules used in the design of air ducts.
For lengths of up to 2 metres, the same diameter as the boiler flue gas outlet can be used (see the technical
specification table). For more tortuous paths, the diameter must be suitable increased.
The smokestack must in any case be dimensioned as to applicable regulations. It is advisable to pay great
attention to the inside diameter, insulation, gas tightness, ease of cleaning and to the fitting required for
taking flue gas samples for combustion analysis.
3.5 BURNER
To better answer to steam demand, it is advisable to install a two-stage burner or a modulating burner;
this avoids large pressure variations consequent on sudden stream demands.
Further, and above all with natural gas, every burner start-up is preceded by a long period of preventilation
of the combustion chamber, with consequent loss of heat to the smokestack.
3.5.1 Boiler - Burner coupling
Verify that the spaces between the burner sleeve and the boiler door are suitable filled with flame-resistant
ceramic insulation (Fig. 10).
All details on the draught tube lenght (P6), the diameter of the burner hole (Øb) and the pressurization are
included in the par. Technical Specifications.
1
4
3
2
Fig. 10
KEY:
1. Burner
2. Manhole
3. Thermoinsulating
material
4. Flange
P6
Ø
b