Ravenheat CSI 85 User Manual download pdf (Page 13)

4.8.4 Draining tap

These must be located in accessible positions

to permit the draining of the whole system.

The taps must be at least 15 mm nominal size

and manufactured in accordance with BS 2870

1980.

4.8.5 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.

4.8.6 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 6 Its of expansion water.

If the appliance is connected to a system with

an unusually high water content, calculate

the total expansion and add additional sealed

expansion capacity as appropriate (Fig. 7).

In general, modern systems will present no

problem.

4.8.7 Mains water feed: central heating

There must be no direct connection to the

mains water supply, even through a non return

valve, without the approval of the Local Water

Authority.

Figure 8 depicts the requirements of Diagram R24.2a

of the Water Supply (Water Fittings) regulations 1999.

Fig. 8

PERMISSIBLE METHOD OF FILLING

Fig. 7

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Ravenheat CSI 85 User Manual Page 13