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ENTRAL

EATING

Detailed recommendations are given in BS 6798:1987 and BS 5449-1:1990, the

following notes are given for general guidance.

IPE

ORK

Copper tubing to BS EN 1057:1996 is recommended for water pipes. Jointing should

be either with capillary soldered or compression fittings.

Where possible pipes should have a gradient to ensure air is carried naturally to air

release points and water flows naturally to drain taps.

The appliance has a built-in automatic air release valve, however it should be

ensured as far as possible that the appliance heat exchanger is not a natural

collecting point for air.

Except where providing useful heat, pipes should be insulated to prevent heat loss

and avoid freezing.

Particular attention should be paid to pipes passing through ventilated spaces in

roofs and under floors.

PASS

The appliance includes an automatic by-pass valve, which protects the main heat

exchanger in case of reduced or interrupted water circulation through the heating

system, due to the closing of thermostatic valves or radiator valves within the

system.

YSTEM

ESIGN

This boiler is suitable only for sealed systems.

Drain Cocks:

These must be located in accessible positions to permit the draining of the whole

system and should be fitted at all low points. The taps must be at least 15mm

nominal size and manufactured in accordance with BS 2870:1980.

AFETY

ALVE

ISCHARGE

The discharge should terminate facing downward on the exterior of the building in a

position where discharging (possibly boiling water & steam) will not create danger or

nuisance, but in an easily visible position, and not cause damage to electrical

components and wiring.

The discharge must not be over an entrance or a window or any other type of public

access.

ELEASE

OINTS

These must be fitted at all high points where air naturally collects 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 6 litre (1.3 gal) of expansion water. If the heating circuit has an

unusually high water content, calculate the total expansion and add an additional

sealed expansion vessel with adequate capacity. This should be located on the

return pipe work as close as possible to the pump inlet.

- C

AINS

ATER

EED

ENTRAL

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.

ILLING

A temporary method for initially filling the system and replacing lost water during

servicing and initial filling (in accordance with current Water Regulations), is provided

as an integral part of the connection kit (see F

removed once the system has been filled.

EATING

. 2.4). The flexible hose must be

ESIDUAL

EAD OF THE

OILER