Heatrae Sadia Multipoint ECO 30L V 3kW Installation, Operation And Maintenance Manual page 11

supplied and should be fitted.
A suitable drain off valve should be installed in the
`
cold water supply to the appliance between the
Expansion Valve and the appliance at as low a
level as possible.
It is recommended that the outlet point of the drain
`
pipework be at least 1 metre below the level of the
base of the appliance (this can be achieved by
attaching a hose to the drain off valve spigot).
Hot water distribution pipework should be 22mm
`
pipe with short runs of 15mm pipe to terminal
fittings such as sinks and basins. Pipe sizes may
vary due to system design.
12
8
11
10
2
9 9
Figure 6: Typical installation - schematic (not to scale)
Item
1
2
3
4
5
6
7
8
9
10
11
12
Table 5: Typical installation table
6
7
5
8
9
Balanced Cold Water Draw Off
Expansion (Pressure) Relief Valve
Temperature and Pressure Relief Valve
4
3
2
Description
Cold Water Mains in
Service Valve (not supplied)
Pressure Reducing Valve
Check Valve
Expansion Vessel
Tundish
Drain Off Valve
Hot out
Water heater
1
2
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