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6.9 WATER CONNECTIONS
Pressure Regulating
Valve set @ 3.5 Bar
NUOS Cold In
Blue Collar
¾ BSP M
NUOS Hot Out Red Collar ¾ BSP M
Hot Supply
to Taps
Pressure Relief
Discharge Pipe
See Fig. 6.16a.
Tundish
Integrated
Non-return Valve
Combination Valve
NUOS TPR Valve
22mm
15mm
15mm
22mm
Cylinder Drain Cock
(Must be fitted to cold feed)
Condensate Drain
Connect to appliance using
½ elbow spigot supplied.
Expansion Vessel
Pressure
Relief Valve
Cold
Supply to
Taps
Cold
Supply
¾BSP F to ¾BSP M Dielectric Joint
(supplied) must be fitted to NUOS Hot Out
HC
MIX
Cold
Thermostat mixing valve
(not supplied)
33
3
FIG. 6.9A WATER CONNECTIONS SCHEMATIC
6.10 EXPANSION VESSEL INSTALLATION
FIG. 6.10A EXPANSION VESSEL INSTALLATION
DO NOT install expansion vessel vertically with connection at the bottom (A).
DO NOT connect via a vertical pipe above the combination valve (B).
DO NOT use flexible hoses (C).
Installing EV incorrectly can cause air to become trapped in the expansion vessel resulting
in potential nuisance vibration through the Nuos and pipework.
A
B
C
Not to scale
Not to scale
WARNING
Hot water at temperatures above 50ºC
running from the taps may immediately
cause serious burns. Children, the
disabled and the elderly run a greater risk
in this regard. Therefore it is advisable
to use a thermostat mixing valve
connected to the water outlet or where
preferred at the point of use.
27


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