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1.4.5
Unvented package installation, DWH 200, DWH 300
Return line
heating system
Supply line
heating system
Figure 5.
The principal installation solution of the unvented package on a DWH.
Position
Name
1
Factory fitted combined Temperature and Pressure Relief Valve
2
Expansion Vessel
3
Flexible hose
5
Unvented manifold assembly: Pressure Reducing Valve, Safety Relief Valve,
Non-return Valve
6
Shut-off Valve
7
Double Check Valve with Shut-off Valve
8
Flexible hose
9
Safety Relief Valve
10
Expansion Vessel Heating System
11
Strainer
*
) The water heater tank in DWH is factory fitted with a Temperature and Pressure Relief Valve. The connec-
tion from this valve must not be used for other purposes other than discharge pipe connection. Please see
next page for Discharge Pipe Arrangement.
E
Note! No valve should be fitted between the safety relief valve and the storage cylinder.
8
10
11
DWH 200
Heat pump
DWH 300
HW to
house
9
1
*
VMBNB72J
CW to
6
house
8
6
7
5
6
3
Unvented manifold assembly
(see figure 1)
3
2
CW
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