Crown PIP-AMC Technical Information download pdf (Page 47)

Page 47

Com-Tech 200/400/800/1600 Power Amplifiers

9 Fire Protective Signaling

Some installations are required to have an emergency

public address system. For these systems, UL pro-

vides a special listing called Amplifiers for Fire Protec-

tive Signaling Systems. All

Com-Tech

amplifiers are

UL-listed for this type of system.

Due to the strenuous nature of the classification, sev-

eral requirements must be considered for proper in-

stallation:

1. The amplifier must be installed in a 19 inch rack

mount enclosure that is UL-listed for use in Fire Pro-

tective Signaling Systems.

2. The amplifier must be installed in the same room as

the Fire Alarm Control Unit.

3. The amplifier must be installed in accordance with

the

National Electric Code

(NFPA 70), the

National

Fire Alarm Code

(NFPA 72) and the local authority

having jurisdiction.

4. The

Com-Tech 200

must have a

P.I.P.-BB

, a

P.I.P.-UL1711

or a

P.I.P.-ISO

installed (see Sec-

tion 8.1). All other

Com-Tech

amplifiers must have a

P.I.P.-UL1711

installed for supervision by a

UL-listed Fire Alarm Control Unit.

5. The amplifier must be configured for 70 volt Dual

mode operation.

6. The power requirement of the connected loud-

speakers should not exceed the amplifier’s power

rating for Fire Protective Signaling Systems (refer to

the specification that follows).

When using a

Com-Tech 200

in a Fire Protective Sig-

naling Application,

does not require the installation

of a

P.I.P.-UL1711

as they do for the other

Com-Tech

amplifiers. Even so, the

P.I.P.-UL1711

might still be a

desirable addition with its amplifier monitoring and re-

mote on/off capabilities. With a

Com-Tech 200

, if a

P.I.P.-UL1711

is not installed, either the included

P.I.P.-BB

or a

P.I.P.-ISO

must be installed. No matter

which

P.I.P.

is installed, the input wiring must be super-

vised by the Fire Alarm Control Unit. Please refer to

Section 3.3.2 for

P.I.P.-BB

wiring instructions. For

P.I.P.-UL1711

and

P.I.P.-ISO

installation, please refer to

the wiring instructions provided in each

P.I.P.

manual.

For Fire Protective Signaling Applications, UL requires

an amplifier’s output power ratings to be valid for emer-

gency operating conditions. This is why

Com-Tech

amplifiers have special 70 volt Dual mode power

specifications for Fire Protective Signaling Applica-

tions. The

Com-Tech 200

is rated for 50 watts per

channel, the

Com-Tech 400

is rated for 122 watts per

channel, the

Com-Tech 800

is rated for 222 watts per

channel, and the

Com-Tech 1600

is rated for 350 watts

per channel. All models have a power bandwidth for

this specification of 800 to 2,800 Hz. Crown guaran-

tees these specification in accordance with the el-

evated operating temperature and strenuous condi-

tions associated with emergency operation.

Current draw from the AC mains is also rated specifi-

cally for Fire Protective Signaling Applications. The

Com-Tech 200

has a rating of 3.0 amps, the

Com-Tech

400

has a rating of 6.0 amps, the

Com-Tech 800

has a

rating of 9.0 amps, and the

Com-Tech 1600

has a rat-

ing of 18.0 amps.

UL installation guidelines do not allow an amplifier to

exceed its power rating for Fire Protective Signaling

Applications.

Com-Tech

amplifiers can deliver much

more power than this special rating suggests, so you

must ensure that the total of the wattage ratings for the

connected loudspeakers does not exceed the

amplifier’s required power rating for UL listing.

The specifications provided in this section supersede

those given in Section 6 only for Fire Protective Signal-

ing Applications. For more information on using

Com-

Tech

amplifiers in Fire Protective Signaling Applica-

tions, please refer to the

P.I.P.-UL1711

Owner’s Manual

or contact Crown’s Technical Support Group.

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