VOKERA Linea Service Manual download pdf (Page 8)

Linea

3.6 WATER CIRCULATION

Detailed recommendations are given in BS 5449

Part 1 and BS 6798. The following notes are for

general guidance only.

3.6.1 PIPEWORK

It is recommended that copper tubing to BS 2871

Part 1 is used in conjunction with soldered capil-

lary joints.

Where possible pipes should have a gradient to

ensure air is carried naturally to air release points

and that water flows naturally to drain cocks.

Except where providing useful heat, pipes should

be insulated to avoid heat loss and in particular

to avoid the possibility of freezing. Particular at-

tention should be paid to pipes passing through

ventilated areas such as under floors, loft space,

and void areas.

3.6.2 AUTOMATIC BY-PASS

The appliance has a built-in automatic by-pass,

consequently there is no requirement for an ex-

ternal by-pass, however the design of the sys-

tem should be such that it prevents boiler ‘cy-

cling’.

3.6.3 DRAIN COCKS

These must be located in accessible positions to

facilitate draining of the appliance and all water

pipes connected to the appliance. The drain cocks

must be manufactured in accordance with BS

2879.

3.6.4 AIR RELEASE POINTS

These must be positioned at the highest points

in the system where air is likely to be trapped.

They should be used to expel trapped air and

allow complete filling of the system.

3.6.5 EXPANSION VESSEL

The appliance has an integral expansion vessel

to accommodate the increased volume of water

when the system is heated. It can accept up to 8

litres (726/730) of expansion from within the sys-

tem, generally this is sufficient, however if the

system has an unusually high water content, it

may be necessary to provide additional expan-

sion capacity (see 6.19).

3.6.6 FILLING POINT

A method for initial filling of the system and re-

placing water lost during servicing etc. has been

provided. This method of filling complies with the

current Water Supply (Water Fittings) Regulations

1999 and Water Bylaws 2000 (Scotland).

3.6.7 LOW PRESSURE SEALED SYSTEM

An alternative method of filling the system would

be from an independent make-up vessel or tank

mounted in a position at least 1 metre above the

highest point in the system and at least 5 metres

above the boiler (see fig. 5).

The cold feed from the make-up vessel or tank

must be fitted with an approved non-return valve

and stopcock for isolation purposes. The feed pipe

should be connected to the return pipe as close

to the boiler as possible.

3.6.8 FREQUENT FILLING

Frequent filling or venting of the system may be

indicative of a leak. Care should be taken during

the installation of the appliance to ensure all as-

pects of the system are capable of withstanding

pressures up to at least 3 bar.

3.7 ELECTRICAL SUPPLY

The appliance is supplied for operation on 230V

@ 50Hz electrical supply; it must be protected

with a 3-amp fuse. The method of connection to

the mains electricity supply must allow for com-

plete isolation from the supply. The preferred

method is by using a double-pole switch with a

contact separation of at least 3mm. The switch

must only supply the appliance and its corre-

sponding controls, i.e. time clock, room thermo-

stat, etc. Alternatively an un-switched shuttered

socket with a fused 3-pin plug both complying with

BS 1363 is acceptable.

3.8 SHOWERS

If the appliance is intended for use with a shower,

the shower must be thermostatically controlled

and be suitable for use with a combination boiler.

3.9 MOUNTING ON A COMBUSTIBLE SURFACE

If the appliance is to be fitted on a wall of com-

bustible material, a sheet of fireproof material

must protect the wall.

Fig. 5

Make-up vessel

or tank

Automatic

air-vent

Non-return

valve

Stopcock

5.0 metres minimum

Heating

return

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 51 52

Comments to this Manuals

No comments

VOKERA Linea Service Manual Page 8

Comments to this Manuals

Related products and manuals for Water heaters & boilers VOKERA Linea