HEATING ENGINEER
19
1
8
3 15 10
3
FILLING
ENTRANCE
14
EMPTY
HOT WATER
OUTLETS
3 13 5 3
12
EMPTY
16
9
3
2
3
SYSTEM
DELIVERY
4
5
3
3
2
3
SYSTEM
RETURN
9
11
7
6
b
The choice of system components and the method
of their installation are left up to the heating engineer
installing the system. Installers must use their exper-
tise to ensure proper installation and functioning in
compliance with all applicable legislation.
b
Circuits filled with anti-freeze must be fitted with
water disconnectors.
b
If needed, water supplies and recovery circuits must
be conditioned by suitable treatment systems. See
the table alongside for reference values.
REFERENCE VALUES
PH
6-8
Electrical conductivity
below 200 mV/cm (25°C)
Chlorine ions
below 50 ppm
Sulphuric acid ions
below 50 ppm
Total iron
below 0,3 ppm
Alkalinity M
below 50 ppm
Total hardness
35° F
Sulphur ions
none
Ammonia ions
none
Silicon ions
below 30 ppm
Below are given the two main hydraulic diagrams:
FILLING
ENTRANCE
3
3
11
10
8
7
3
2
3
SYSTEM
RETURN
3
2
3
SYSTEM
DELIVERY
4
5
3
1
6
EMPTY
9
Heating and hot water installation
Just heating installation
1 - Boiler
2 - System headers
3 - Sectioning valves
4 - System circulators
5 - Check valves
6 - Automatic pressure relief valve
7 - Boiler safety valve
8 - Boiler discharge valve
9 - Expansion tank
10 - Pressure reducer
11 - Manual fast filling valve
1 - Boiler
2 - System headers
3 - Sectioning valves
4 - System circulators
5 - Check valves
6 - Automatic pressure relief valve
7 - Boiler safety valve
8 - Boiler discharge valve
9 - Expansion tank
10 - Pressure reducer
11 - Manual fast filling valve
12 -
r
7300
heater
13 - Hot water recycle pump
14 - Heater safety valve
15 - Water softener filter
16 - Heater discharge valve
