Ravenheat HE 25 C COMPACT, Instructions For Use Installation And Servicing

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4.13 AIR RELEASE POINTS
These must be fitted at all high points where
air will naturally collect, and must be sited to
facilitate complete filling of the system.
The appliance has an integral sealed expansion
vessel to accommodate the increase of water
volume when the system is heated.
It can accept up to 7 L of expansion water 7 L of expansion water
If the appliance is connected to a system with If the appliance is connected to a system with
an unusually high water content, calculate an unusually high water content, calculate
the total expansion (see table 3) and add
the total expansion (see table 3) and add
additional sealed expansion capacity as
additional sealed expansion capacity as
appropriate (Fig. 8). In general, modern
appropriate (Fig. 8). In general, modern
systems below 7 L should not present any
systems below 7 L should not present any
problem.
problem.
4.14 4.14 MAINS WATER FEED. CENTRAL HEATING MAINS WATER FEED. CENTRAL HEATING
There must be no direct connection to the There must be no direct connection to the
mains water supply, even through a
mains water supply, even through a
non-return valve, without the approval of the non-return valve, without the approval of the
Local Water Authority. Local Water Authority.
Fig.8