Crown PIP-AMC Informations techniques télécharger pdf (Page 10)

Macro-Tech 3600VZ Power Amplifier

Page 10

3 Installation

3.1 Mounting

Macro-Tech

amplifiers are designed for standard 19

inch (48.3 cm) rack mounting and “stack” mounting

without a cabinet. In a rack cabinet, it is best to mount

them one on top of the other. This provides efficient air

flow and enables each unit to support the one above.

Important: Due to its weight, the back of the amplifier

should be supported.

Fig. 3.2 Top View of a Rack-Mounted Unit

If the air supply is unusually dusty, it may be necessary

pre-filter it using commercial furnace filters, etc., to pre-

vent rapid loading of the unit’s own air filter. When

needed, the unit’s filter can be cleaned with mild dish

detergent and water (see Section 4.5).

When mounting the amplifier in a rack cabinet, the side

walls of the rack should be at least 2 inches (5 cm)

away from the chassis as shown in Figure 3.2.

Tip:

An easy way to verify adequate cooling is to ob-

serve the ODEP indicators with the amplifier operating

under worst-case conditions. If the indicators dim, ad-

ditional cooling is recommended.

If your rack cabinet has a front door that could block

air flow to the amplifier’s air intakes, you must provide

adequate air flow either with a grille in the door or by

pressurizing the air behind the door. Wire grilles are

recommended over perforated panels because they

have larger openings and cause less restriction.

A good choice for increased air flow behind a rack

cabinet door is to mount one or more “squirrel cage”

blowers in the rack (Option 1 below). The blower is

mounted at the bottom of the rack so it blows outside

air into the space between the door and the front of the

amplifiers. This blower should not blow air into or take

air out of the space behind the amplifiers. For racks

without a door, mount a blower at the top of the rack so

air is drawn out the back (Option 2 below). The blower

must provide air flow that exceeds the sum of the air

flow required by the individual amplifiers.

SIDE VIEW

19 in

48.3 cm

16 in

40.6 cm

3.5 in

8.9 cm

2.5 in

6.35 cm

LEVEL LEVEL

OFF

ENABLECH1 CH2

ODEP

SIGNAL

IOC

Fig. 3.3 Proper Air Flow in a Rack Cabinet

Fig. 3.1 Mounting Dimensions

3.2 Cooling

NEVER block the amplifier’s side vents and front air

intake. Under demanding conditions, there should be

a minimum air flow of 45 cubic feet (1.3 cubic meters)

per minute per amplifier. When mounted in a rack, all

empty spaces should be covered with blank panels to

prevent improper air flow. The amplifier’s air flow should

be augmented with a rack cooling system if its load is

less than 4 ohms and it must operate at consistently

high output levels as in concert sound reinforcement.

AIR

FLOW

AIR FLOW

AMPLIFIER

(TOP VIEW)

RACK

CABINET

16 in

40.6 cm

2 in

(5 cm)

MIN.

IMPORTANT: Be sure rear of amplifier

is securely mounted to rack.

17 in

43.2 cm

AIR

FLOW

BLOWER

(OPTION 2)

BLOWER

(OPTION 1)

AIR

FLOW

FRONT

RACK

DOOR

AIR

FLOW

EQUIPMENT

RACK

(SIDE VIEW)

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 40 41

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Crown PIP-AMC Informations techniques Page 10

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