ASL INTERCOM VAR4 Installation Manual page 7

Recommended Installation Procedure
Please read and observe the instructions and guidelines in Section "5 Safety and Precautions" (page 17)
! !
prior to installation. Failure to follow these instructions and guidelines may cause personal injury and/or
damage to the equipment.
1. Fit the VAR4 into a 19-inch standard equipment rack on supporting rails, and secure the unit in
position using the fixing screws and washers provided; see Figure 1.
Ensure that there is at least 1U of ventilated space between the unit and any source of heat (e.g.
!
!
Amplifier Mainframes).
Figure 1 Installing the VAR4 into the rack
VENTILATION PANEL
VAR4
VENTILATION PANEL
ENSURE 1U VENTILATION
!
!
PANELS ARE FITTED ABOVE
AND BELOW THE EQUIPMENT.
DO NOT OBSTRUCT
VENTILATION HOLES.
2. Set the rear-panel EARTH LIFT switch to the 'grounded' position (
Only set the EARTH LIFT switch to the 'ungrounded' position (
!
!
supply is used.
Figure 2 Setting the Earth Lift switch
VAR4 – Installation Guide
GENERIC 19-INCH 1U FORMAT
M6 POZIDRIV SCREW
M6 PLAIN WASHER
M6 CAGE NUT
EARTH LIFT SWITCH: ON
(RIGHT-HAND SIDE POSITION)
Issue: 02 complete, approved
Page 7 of 20
SUPPORTING RAILS MUST BE USED.
!
!
, ON); see Figure 2.
, OFF) if a +ve ground battery