Appendix UK – 9
3.2 System solution
3.2.1 Unvented package installation, DHP-H and DHP-A models
126
110
80
128
96
80
86
80
129
132
91
96
10 11
113
12
12
85
Unvented manifold assembly
(see figure 1)
DHP-H
DHP-A
Figure 3. The principal installation solution of the unvented package on DHP-H and DHP-A models.
Position Name
10 Supply line heating system
11 Return line heating system
12 Cold water
80 Shut-off valve
85 Venting valve
86 Safety relief valve heating system
91 Strainer
96 Flexible hose
110 Expansion vessel
113 Expansion heating system
126 Factory fitted combined Temperature and pressure relief valve*
128 Double check valve with Shut-off valve
129 Unvented manifold assembly: Pressure reducing valve, Safety relief valve, Non-return valve
132 Flexible hose Unvented package
*
) The water heater tank in DHP-H and DHP-A models is factory fitted with a Temperature and pressure relief
valve. The connection from this valve must not be used for other purposes other than discharge pipe con-
nection. Please see chapter 5.3 Discharge pipe arrangement.
Note! No valve should be fitted between the safety relief valve and the storage cylinder.
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