Pre-Installation
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21
6 720 644 143 (2010/09)
S and Y plan systems:
Optional diverter valve
This boiler is designed to operate on a sealed system
only and will require a second return pipe from the water
cylinder to the wall mounting frame.
Hot water supplied to sanitary fixtures
In accordance with AS 3498 a temperature control
device such as a tempering valve must be fitted when
hot water is supplied to sanitary fixtures used primarily
for the purposes of personal hygiene.
Fig. 8
S plan layout
Fig. 9
Y plan layout with external diverter valve
Fig. 10 System layout with optional internal diverter
valve (not supplied with boiler)
Legend to Fig. 8 to Fig. 10:
1
Diverter valve
2
Radiater valve (flow)
3
Lock shield valve (return)
4
Bypass
5
Boiler flow
6
Cylindr return
7
Heating return
NOTE:
The boiler is fitted with its own
internal bypass.
NOTE:
B
A drain point should be fitted at the
lowest part of the heating circuit and
beneath the boiler.
3
2
1
4
M
M
6720644143-39.1J
3
2
1
M
6720644143-38.1J
3
2
6720644143-40.1J
5
6
7
Содержание ZSB 30-2 A
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