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1 Important recommendations on connecting the heating circuit to the boiler and the drinking water system
Installation must be carried out in accordance with the prevailing
regulations, the codes of practice and the recommendations in these
instructions.
The safety valve must be connected to the boiler outlet and no other
valve or flap must be interposed between it and the boiler.
Example of an installation:
The example of an installation shown below does not cover every
possible configuration. Its sole aim is to draw your attention to the
basic rules to be respected.
1 Heating outlet
2 Heating return
3 3 bar safety valve + manometer
5 Flow switch
6 Air separator
7 Automatic bleed valve
9 Isolation valve
10 3-way mixing valve
11 Boiler pump
12 Sludge decanting pot (particularly recommended on older installations)
13 Flush valve
14 Water low safety pressure-sensitive switch
15 Recycling pump
10/04/06 - 300007650-001-A
Hydraulic connections
GT 330 boiler with domestic hot water production using an independent tank
3
5
6
9
16
13
17
20 9
9
19
18
France: Heating installations must be designed and constructed in
such a way as to prevent the return of water from the heating circuit
and products put into it into the drinking water network located
upstream; the installation must not be in direct relation with the
drinking water network (Article 16-7 of the departmental health
Directive).
When these installations are fitted with a filling system connected to
the drinking water network, they comprise a CB disconnector
(disconnector for zones with non-controllable pressure differences)
which satisfy the functional requirements of the NF P 43-011
standard.
7
10
9
9
9
15
9
9
9
27
57
9
56
27
7 9
26
32
27
9
31
29
17
30
16 Expansion chamber
17 Drain cock
18 Heating circuit filling (with disconnector depending on prevailing
regulations)
19 Water treatment if TH > 25°
20 Water meter
26 DHW load pump
27 Non-return valve
28 Domestic cold water inlet
29 Pressure reducer (if mains pressure 5.5 bar)
30 Sealed safety unit calibrated to 7 bar with indicator type discharge
31 Independent domestic hot water tanks
32 Domestic hot water loop pump (optional)
56 Domestic hot water circulation return loop
57 Domestic hot water outlet
GT 330
1
14
11
12
2
9
17
9
28
8219N008C
13
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