CEA 4001 - Page 124

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124

distribution

pipe spur,

as

appropriate.

The

valve

outlet

shall

be

fitted

with

a

brass

plug

cap.

D.3.4 Monitoring

Zoned

sprinkler

installations

shall

be

provided

with

tamperproof

devices

to

monitor

the

status

of:

a)

each

stop

valve

(i.e.

either

fully

open

or

not

fully

open),

including

subsidiary

stop

valves,

capable

of

interrupting

the

flow

of

water

to

sprinklers;

b)

water

flow

into

each

zone

immediately

downstream

of

each

zone

subsidiary

stop

valve,

to indicate

the

operation

of

each

zone,

by

means

of

a

water

flow

alarm

switch

capable

of

detecting

a

flow

equal

to

or

greater

than

that

from

any

single

sprinkler;

c)

water

flow

through

each

main

installation

control

valve

set.

D.3.5 Zone test and drainage facilities

Permanent

test

and

drainage

facilities

shall

be

provided

immediately

downstream

of

the

water

flow

alarm switch

on

each

zone.

The

test

facility

shall

simulate

operation

of

any

single

sprinkler

head.

Adequate provision

shall

be

made

for

the

disposal

of

waste

water.

D.3.6 Installation control valve set

The

main

control

valve

set

of

a

zoned

sprinkler

installation

shall

have

tow

stop

valves,

one

on

each

side

of

a single

alarm

valve

with

a

bypass

connection

of

the

same

nominal

bore

around

all

three

valves,

fitted

with

a normally

closed

stop

valve

(see

Figure

D1).

Each

of

the

three

stop

valves

shall

be

fitted

with

tamper

proof devices

to

monitor

their

status

(i.e.

fully

open

or

not

fully

open).

D.3.7 Installation monitoring and alarms

The

monitoring

devices

required

by

D.3.4

and

D.3.6

shall

be

electrically

connected

to

a

control

and indicating

panel,

located

on

the

premises,

where

the

following

indications

and

warnings

shall

be

given:

a)

by

means

of

green

visual

indicators

that

each

monitored

stop

valve

is

in

its

correct

operational position;

b)

by

means

of

audible

devices

and

amber

visual

indicators

that

one

or

more

control

valve

sets

are not

fully

open;

c)

by

means

of

audible

devices

and

amber

visual

indicators

that

one

or

more

zone

subsidiary

stop valves

are

not

fully

open;

d)

by

means

of

audible

devices

and

amber

visual

indicators

that

the

static

pressure

in

any

trunk main

supplying

the

system

has

fallen

to

a

value

0,5bar

or

more

below

the

normal

static

pressure;

e)

by

means

of

audible

devices

and

red

visual

indicators

that

water

is

flowing

into

the

installation;

f)

by

means

of

audible

devices

and

red

visual

indicators

that

water

is

flowing

into

one

or

more zones.

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