BENSON VRC-3 100-3, Installation, Service And User Instructions Manual

1704VRC3-AMEN, p 17/35 

IMPORTANT:

 

The

 

flue

 

must

 

be

 

installed

 

in

 

accordance

 

with

 

national

 

and

 

local

 

regulations.

 

Failure

 

to

 

provide

 

proper

 

flueing

 

could

 

result

 

in

 

death,

 

serious

 

injury

 

and/or

 

property

 

damage.

 

The

 

air

 

heater

 

must

 

be

 

installed

 

with

 

a

 

flue

 

to

 

the

 

outside

 

of

 

the

 

building.

 

Safe

 

operation

 

of

 

any

 

power

 

vented

 

gas

 

apparatus

 

requires

 

a

 

properly

 

operating

 

flue

 

system,

 

correct

 

provision

 

for

 

combustion

 

air,

 

and

 

regular

 

maintenance

 

and

 

inspection.

 

 

 
 

3.3.1

 

Flues

 

for

 

power

 

vented

 

installations

 

(Type

 

B

 

appliances)

 

 

If

 

the

 

air

 

heater

 

is

 

to

 

be

 

installed

 

as

 

a

 

type

 

B

 

appliance,

 

air

 

for

 

combustion

 

will

 

be

 

taken

 

from

 

within

 

the

 

space

 

where

 

the

 

heater

 

is

 

installed.

 

Ensure

 

that

 

an

 

adequate

 

air

 

supply

 

for

 

combustion

 

and

 

ventilation

 

is

 

provided

 

within

 

the

 

building

 

in

 

accordance

 

with

 

the

 

regulations

 

&

 

rules

 

in

 

force.

 

 

Table

 

5

 

shows

 

flue

 

pipe

 

sizes

 

and

 

maximum

 

pipe

 

lengths.

 

The

 

minimum

 

flue

 

length

 

is

 

0.5

 

metres.

 

Single

 

wall

 

flue

 

pipes

 

are

 

required.

 

All

 

joints

 

must

 

be

 

sealed

 

to

 

prevent

 

products

 

of

 

combustion

 

from

 

leaking

 

into

 

the

 

building.

 

An

 

approved

 

flue

 

terminal

 

is

 

required.

 

 

If

 

the

 

flue

 

passes

 

through

 

a

 

combustible

 

element

 

of

 

the

 

building

 

it

 

must

 

be

 

enclosed

 

by

 

a

 

sleeve

 

of

 

non

‐

combustible

 

material

 

and

 

separated

 

from

 

the

 

sleeve

 

by

 

at

 

least

 

a

 

25

 

mm

 

air

 

break.

  

 

Table

 

5

 

:

 

Flue

 

pipe

 

diameters

 

&

 

maximum

 

lengths

The

 

temperature

 

of

 

any

 

combustible

 

material

 

near

 

to

 

the

 

flue

 

must

 

not

 

exceed

 

65°C

 

when

 

the

 

heater

 

is

 

in

 

operation.

 

The

 

flue

 

must

 

be

 

at

 

least

 

50

 

mm

 

away

 

from

 

any

 

combustible

 

material.

 

Single

 

wall

 

flue

 

pipe

 

exposed

 

to

 

cold

 

air

 

or

 

run

 

through

 

unheated

 

areas

 

must

 

be

 

insulated.

 

Where

 

condensation

 

is

 

unavoidable,

 

provision

 

must

 

be

 

made

 

for

 

the

 

condensation

 

to

 

flow

 

freely

 

to

 

a

 

point

 

to

 

which

 

it

 

can

 

be

 

released,

 

i.e.

 

a

 

drain

 

or

 

gully.

 

The

 

condensation

 

drain

 

from

 

the

 

flue

 

must

 

be

 

constructed

 

from

 

non

‐

corrodible

 

material

 

not

 

less

 

than

 

20

 

mm

 

diameter.

 

Copper

 

or

 

copper

 

based

 

alloys

 

must

 

not

 

be

 

used

 

for

 

condensation

 

drains.

 

 
 

3.3.2

 

Combustion

 

air

 

inlet

 

pipe

 

&

 

flue

 

pipe

 

for

 

balanced

 

flue

 

installation

 

(Type

 

C

 

appliances)

 

 

Balanced

 

flue

 

air

 

heaters

 

are

 

designed

 

to

 

be

 

fitted

 

with

 

a

 

combustion

 

air

 

inlet

 

pipe

 

that

 

obtains

 

outdoor

 

air

 

and

 

a

 

flue

 

pipe

 

that

 

exhausts

 

flue

 

products

 

to

 

outdoors.

 

 

Air

 

heaters

 

if

 

fitted

 

with

 

a

 

power

 

venter

 

permitting

 

either

 

a

 

vertical

 

or

 

horizontal

 

combustion

 

air

 

inlet/flue

 

pipe

 

system.

 

The

 

heaters

 

must

 

be

 

installed

 

with

 

a

 

concentric

 

vertical

 

or

 

horizontal

 

flue/combustion

 

air

 

inlet.

 

The

 

heaters

 

are

 

only

 

approved

 

for

 

use

 

when

 

installed

 

with

 

the

 

appropriate

 

approved

 

concentric

 

vent

 

terminal.

 

See

 

table

 

6.

 

 

Both

 

the

 

flue

 

and

 

combustion

 

air

 

pipes

 

must

 

be

 

sealed.

 

Use

 

gasket

 

sealed

 

seamless

 

aluminum

 

pipe

 

or

 

equivalent.

 

The

 

flue

 

pipe

 

must

 

include

 

a

 

re

‐

sealable

 

test

 

port

 

to

 

allow

 

good

 

average

 

sampling

 

of

 

the

 

flue

 

gas

 

mixture

 

for

 

testing,

 

the

 

port

 

must

 

be

 

at

 

least

 

450

 

mm

 

away

 

from

 

the

 

air

 

heater

 

flue

 

connection

 

socket.

 

 

Follow

 

any

 

flue

 

pipe

 

manufacturers’

 

installation

 

instructions

 

for

 

making

 

joints,

 

including

 

connections

 

to

 

the

 

air

 

heater,

 

for

 

passing

 

through

 

a

 

building

 

element

 

and

 

for

 

support

 

requirements.

 

If

 

more

 

than

 

one

 

air

 

heater

 

is

 

being

 

installed

 

in

 

the

 

same

 

place

 

each

 

heater

 

must

 

have

 

a

 

separate

 

flue

 

system.

 

Where

 

condensation

 

is

 

unavoidable,

 

provision

 

must

 

be

 

made

 

for

 

the

 

condensation

 

to

 

flow

 

freely

 

to

 

a

 

point

 

to

 

which

 

it

 

can

 

be

 

released,

 

i.e.

 

a

 

drain

 

or

 

gully.

 

The

 

condensation

 

drain

 

from

 

the

 

flue

 

must

 

be

 

constructed

 

from

 

non

‐

corrodible

 

material

 

not

 

less

 

than

 

20

 

mm

 

diameter.

 

Copper

 

or

 

copper

 

based

 

alloys

 

must

 

not

 

be

 

used

 

for

 

condensation

 

drains.

 

VRC-3

other sizes

Heater socket & 

mm

pipe dia

Maximum straight 

m

length

Equivalent length 

m

of 45° elbow

Equivalent length 

m

of 90° elbow

9

0.75

1.5

20 & 30

100

130