Triton 2181629F Manual page 8

*Diagrammatic view – not to scale.
*Fig.3
For illustration purposes only.
Safety devices
not shown
Unvented
hot water
storage unit
Pressure
reducing
Balanced cold mains supply
valves
Stop tap
Cold mains supply
*Fig.4
*Diagrammatic view – not to scale.
For illustration purposes only.
Mixer
Blender
Hot
valve
water
Service
valves
Expansion
vessel
Pressure
reducing valve
Stop tap
Cold mains supply
Push button mixer shower
Mixer
Service
valves
Expansion
vessel
Return
Flow
Boiler
6
Unvented Mains Pressure Systems
(fig.3)
The mixer shower can be installed with an
unvented, stored hot water cylinder.
For systems with no cold water take off after the
appliance reducing valve, it will be necessary to
fit an additional drop tight pressure reducing
valve when the mains pressure is over 5 bar. The
drop tight pressure reducing valve must be set at
the same value as the unvented package pressure
reducing valve.
Note: An additional expansion vessel may be
required if a second pressure reducing valve is
installed. This does not apply to packages with a
cold take off after the pressure reducing valve to
the cylinder.
Mains Pressurised Thermal Store Systems
(fig.4)
Packages of this type, fitted with a tempering
valve (blender valve) can be used. A drop tight
pressure reducing valve MUST be fitted if the
supply pressures exceed 5 bar running.
An expansion vessel MUST be fitted and regularly
maintained, to ensure the unit is not damaged
by excess pressures. This may already be installed
externally or internally within the thermal store
(check with thermal store manufacturer).