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Installing the boiler
6 720 648 162 (2011/08)
6.2.3
Installing system components
See the installation diagram for installation of the
heating system components.
For more installation examples refer to
Æ
Chapter 11,
page 48.
Fig. 49 Installationsschema
1
Pressure relief valve
2
Pressure/temperature gauge
3
Ball or stop valve
4
Air eliminator (in main supply)
5
System pump
6
Flow check valve
7
Expansion tank
8
Automatic feed valve
9
Flow check valve
10
Purge station
11
Water feed
VK
Boiler supply
EL
Drain
RK
Return
6.3
Filling the heating system and
checking for leaks
When the boiler is delivered assembled it is checked for
leaks at the factory. Before putting the heating system
into operation, it must be checked to ensure that no
leaks will occur during operation. When supplied
disassembled (
Æ
Chapter 5.2, page 24).
Carry out the leak test at 1.5 times the standard
operating pressure and in accordance with the codes.
B
Seal pressure relief valve connection (
Æ
Fig. 47
"Installing B-Kit", page 31) and all other open
connection with blind plugs.
B
Isolate the expansion tank from the system by closing
the valve.
7 747 019 141-16.1RS
1
2
3
3
5
6
3
3
7
3
9
8
VK
RK
11
EL
4
10
CAUTION:
Risk of system damage from
excess pressure when testing for leaks.
Pressure, control and safety equipment may
be damaged by excessive pressure.
B
When you carry out a leakage test, make
sure that no pressure, control or safety
equipment that cannot be isolated from
the boiler water chamber is fitted.
CAUTION:
Risk of damage to system due to
temperature stresses.
If you fill the heating system when it is hot,
the resulting temperature stresses can
cause stress cracks. The boiler will then
leak.
B
Only fill the heating system when cold
(the flow temperature should be no more
than 100 °F (37 °C).
B
Pay attention to the water quality as
specified in the operator's log, and
record the volume and quality of the
water used to fill the system.
Maximum
operating pressure
Maximum
on-site testing pressure
30 psi (2 bar)(with
safety valve supplied)
45 psi (1 bar)
58 psi (4 bar) (with
50 psi (3,5 bar) relief
valve)
75 psi (5,1 bar)
Table 16 Maximum testing pressure