7219708 - 01 (04/15)
EcoBlue System
27
Before Installation
5
5.2.8 Safety Pressure Relief Valve
See B.S. 6798 for full details.
1. The pressure relief valve (Fig. 5) is set at 3 bar, therefore all
pipework, fittings, etc. should be suitable for pressures in
excess of 3 bar and temperature in excess of 100°C.
2. The pressure relief discharge pipe should be not less than
15mm diameter, run continuously downward, and discharge
outside the building, preferably over a drain. It should be routed
in such a manner that no hazard occurs to occupants or causes
damage to wiring or electrical components. The end of the pipe
should terminate facing down and towards the wall (Fig. 4).
3. The discharge must not be above a window, entrance or
other public access. Consideration must be given to the
possibility that boiling water/steam could discharge from the
pipe.
The relief valve must never be used to drain the system
4. A remote relief valve kit is available to enable the boiler to be
installed in cellars or similar locations below outside ground
level.
5. A boiler discharge pump is available which will dispose of
both condensate & high temperature water from the relief valve.
It has a maximum head of 5 metres.
Section 6.2.1 gives details of how to connect the pipe
to the boiler.
Pressure Relief Valve
Discharge Pipe
Control Box
removed for clarity
The end of the pipe should
terminate facing
down and towards the wall
Fig. 4
Fig.5
