Electronics International VA-1A User Manual

Page 21

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RSV

RSVA-3

A-3

Installation Instructions

7/13/92

The RSVA-3 switch is used in conjunction with a VA-1A-XX external shunt unit in a twin engine aircraft to
monitor both alternator outputs and the battery charging and discharging currents.

1. Install the External Shunts:

Install the External Shunts:

Note: If you are replacing an existing ammeter, the shunts may already be mounted in the aircraft. If this is
the case, you should have ordered a VA-1A-XX unit that matches your existing shunts.

The external shunts should be installed in an appropriate location that minimizes the routing of main cables
(refer to the wiring diagram at the end of this section). Also, they should be mounted in a location where
inadvertent damage cannot occur. If the shunts can be accessed easily, they should be covered. When
mounting the shunts, use self-locking or wired nuts.

2. Install the VA-1A-XX Instrument:

Install the VA-1A-XX Instrument:

Install the VA-1A-XX in the aircraft as described in the VA-1A, VA-1A-XX Installation Instruction section
of this manual.

3. Route the Shunt Wires:

Route the Shunt Wires:

Route a 18 to 20 ga. wire from the + and - terminals of each shunt to the RSVA-3 switch mounting location
via a one amp fuse (see the RSVA-3 Wiring Diagram at the back of this section). Pair the wires for each
shunt and crimp a female connector onto the wires connecting to the "+" terminal of each shunt and a male
connector onto the wires connecting to the "-" terminal of each shunt. Red slip-on connectors are provided in
the RSVA-3 kit. When preparing the wires to be crimped, strip each wire and double the wires over. Dou-
bling the wires over and a good tight crimp are critical for a good reliable connection.

Connect the shunt wires to the RSVA-3 switch.

4. Route the Instrument Wires to the RSVA-3:

Route the Instrument Wires to the RSVA-3:

Route the brown and orange wires in the VA-1A-XX instrument wire harness to the RSVA-3 switch mount-
ing location. Crimp a female connector onto the brown wire and a male connector onto the orange wire. Red
slip-on connectors are provided in the RSVA-3 kit. When preparing the wires to be crimped, strip each wire
and double the wires over. Doubling the wires over and a good tight crimp are critical for a good reliable
connection.

Connect the VA-1A-XX instrument wires to the RSVA-3 switch.

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