10
Tempra 12 - 18
Water treatment
if water treatment is used Ferroli Ltd recommend only the use of Fernox or Sentinel water
treatment products, which must be used in accordance with the manufacturers instructions. For
further information contact:
Fernox Manufacturing Co. LTD. Sentinel Division
Tandern house, Marlowe Way Betz Dearborn LTD
Croydon, surrey, CRO 4YS Widnes, Cheshire WA8 5351
Tel. 02870 5601 5000 Tel. 0151 424 5351
Note - If the boiler is installed in an existing system
any unsuitable additives must be removed by thor-
ough cleansing.
All systems should be cleansed according to B.S.
7593.
Note - In hard water areas treatment to prevent
lime scale may be necessary.
Note - It is important that the correct concentration
of the water treatment product is maintained in accordance with the manufactures instructions.
Filling the boiler and the system
The filling pressure, when the system is cold, must be around 1 bar (at least 0.5 bar). If the pressure
drops during operation to a value lower than the minimum described above, the User must restore
the initial value using the filling loop. For correct boiler operation, the pressure, when hot, must
be around 1,5-2 bar. Once the operation is completed, always close the filling loop. This device
is fitted to the system by the installer.
2.4 Gas connection
Before making the connections, check that the appliance is configured for operation with the
type of fuel available, and carefully clean all the gas pipes in the system, to remove any residues
that may affect the correct operation of the boiler.
The gas connections must be made using the relative coupling (see Fig. 5), according to the standards in
force, with a rigid metal pipe, or a stainless steel flexible continuous-wall pipe, fitting a gas cock between
the system and the boiler. Check that all the gas connections for soudness.
The capacity of the gas meter must be sufficient for the simultaneous use of all the connected appliances.
The diameter of the gas pipe, which leaves the boiler, does not necessarily determine the choice of the
diameter of the pipe used between the appliance and the gas meter; this must be chosen according to
its length and the pressure drop, according to the standards in force.
Do not use the gas pipes as the earth for electrical appliances.
VESSEL CHARGE
PRESSURE (bar)
INITIAL SYSTEM
PRESSURE (bar)
TOTAL WATER
CONTENT of SYSTEM
Litres
25
50
75
100
125
150
175
200
For syst. volumes other than
those given above, must. the syst.
volume by the factor across
0.5 1.0 1.5
1.0 1.5 2.01.5 2.0 2.0
EXPANSION VESSEL VOLUME (litres)
3.5
7.0
10.5
14.0
17.5
21.0
24.5
28.0
6.5
12.9
19.4
25.9
32.4
38.8
45.3
51.8
13.7
27.5
41.3
55.1
68.9
82.6
96.4
110.2
4.7
9.5
14.2
19.0
23.7
28.5
33.2
38.0
10.3
20.6
30.9
41.2
51.5
61.8
72.1
82.4
8.3
16.5
24.8
33.1
41.3
49.6
57.9
66.2
0.140 0.190 0.330.259 0.551 0.412
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