Caple CR9215 Technické informace stáhnout pdf (Strana 14)

Stainless Steel-Lined Prefabricated Chimneys

2.2 These systems consist of two skins of stainless steel or a

combination of stainless and galvanised steel incorporating

high quality materials. Depending on the materials of

combustion, these products can be used internally and

externally. These products must be certified to BS4543.

Ceramic or Concrete-Lined Prefabricated Chimney

2.3 Similar to the previous category described in 2.2 except that

the inner lining is either lightweight fireproof concrete or

ceramic material. These products are certified by the British

Board Agreement.

Concrete Block/Masonry Chimneys

2.5 There are three different categories:

• Conventionalbrickormasonryconstructionwitheitherclay

to BS1181 or refractory concrete flue liner manufactured

from a kiln-burnt aggregate and high alumina cement.

• Prefabricatedchimneyblocksystems

• Gasflueblocks

(i) This category is the conventional chimney and, in the

majority of installations with gas appliances, it will be

necessary to utilise a stainless steel flexible liner.

(ii) These prefabricated block chimney systems can

accommodate quite a range of heating appliances including

gas appliances. In some cases, they may need lining with a

flexible liner. The appliance manufacturer and chimney

manufacturer should be consulted for guidance.

(iii) Gas flue blocks consist of a narrow rectangular flue-way

inside a building block normally used as part of the internal

or external house construct. The flue way is usually very

narrow and the systems are often linked with a twin-wall

gas vent to which they are adapted in the loft space. The

gas vent then completes the chimney run through

termination.

Careful inspection of this type of system is recommended. If

not correctly constructed these systems can add to

operational difficulties, especially condensation within the

chimney itself. If any doubts arise about this chimney

system after inspection consider replacing the flue system.

Flue Pipes

2.6 Only use these to connect the Traditional to one of the

chimney types previously mentioned. Any flue type serving

a gas appliance must be kept clear of any combustible

materials, including materials likely to be located near the

installation by the householder. An air gap clearance of 25

mm (1”) must be maintained.

2.7 Flue pipes can be constructed from the following:

– Sheet metal, as described in BS715

– Stainless steel

– Cast iron, described in BS41

– Materials described in Building Regulations suited to solid

fuel and oil burning appliances.

All flue pipes should be constructed to retain condensation

by the flue pipe system. Systems with spigot and socket

joints must be fitted with the sockets uppermost.

3. LINING OF EXISTING CHIMNEY

3.1 It is vital to check the chimney is safe before use or before

refitting a gas appliance. Oversized, leaking or rough

chimneys can be inefficient and dangerous.

3.2 Two types of chimney re-lining can be used with the

Traditional: flexible or rigid. It is important to sweep the

chimney thoroughly before installing the liner to remove

any previous combustion deposits which can damage the

liner.

Flexible Stainless Steel

3.3 For use with existing chimneys. These liners must be

certified to BS715. If an existing chimney has a metal liner,

replace the liner with flexible stainless steel.

Rigid Stainless Steel

3.4 Use type 316 or 304 stainless steel not less than 0.55mm

thick.

INSTALLATION INSTRUCTIONS

SITE REQUIREMENTS

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