Owner manual

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O P E R A T I N G I N S T R U C T I O N S

APU28v/25A

, APU28v/50A,

& APU14v/25A

Auxiliary Power Unit & Battery Charger

INTRODUCTION:

Designed for aircra

ft. Plugs into APU

receptacle

to provid

filtered

bus power for avionics, and flight controls.

Also incorporates a battery charge feature activated with battery switch in cockpit.

INITIAL INSTALLATION:

Before making AC connections, refer to the AC require

ments labeled on the charger ID tag. If your charger is

not equipped with an AC plug, for example, a 220 volt charger

, have a qualified electrician install one.

CAUTION:

To reduce the risk of fire, use this charger only on circuits

provided with a maximum of 20

ampere branch circuit protection (circuit breaker or fuse), In accordance with the

National

Elec

tric

Code, ANSI/NFPA 70, and all local codes and ordinances.

GROUNDING INSTRUCTIONS:

This battery charger must be grounded to reduce the risk of electric shock. If the charger is

equipped with a

grounding type plug, it must be plugged into a nominal 115 volt, 60 Hertz circuit. If the charger is supplied with

no plug, have a qualified service person install one.

WARNING:

Improper connection of the equipment grounding conductor ca

n result in a risk of an

electric shock.

DO NOT USE THIS CHARGER ON A TWO POLE

UNGROUNDED

OUTLET OR ATTEMPT TO BREAK OFF THE GROUND

PRONG

FOR USE ON

A RECEPTAC

OR EXTINSION CORD NOT HAVING

GROUND.

The use of an extension cord with this charger should be avoided. The use of an improper extension cord could

result in

a risk of a fire or electric shock. If an extension cord must be used, make sure it is in good condition.

Use a three conductor cord no smaller than 14 AWG. And keep it as short as possible. Locate all cords so that

they will not be stepped on, tripped ove

r, or otherwise subjected to damage or stress.

Do not operate this

unit

if it shows any signs of physical damage.

WARNING:

Make sure the DC output leads, terminals or connector are al

l in good

working condition.

DO NOT USE THIS UNIT

IF:

The DC output connector,

(if equipped)

is loose or does not make good contact; Is cracked or broken; The leads

are cut or have exposed

wires; The DC output leads or connector feel hot when used.

Using this

unit

with any of the above symptoms could result in a fire, property damage, or personal injury. Have

a qualified service person make the necessary repairs. Repairs should not be made

by people who are not

qualified.

Summary of content (3 pages)

PAGE 1
O P E R A T I N G I N S T R U C T I O N S APU28v/25A, APU28v/50A, & APU14v/25A Auxiliary Power Unit & Battery Charger INTRODUCTION: Designed for aircraft. Plugs into APU receptacle to provide filtered bus power for avionics, and flight controls. Also incorporates a battery charge feature activated with battery switch in cockpit. INITIAL INSTALLATION: Before making AC connections, refer to the AC requirements labeled on the charger ID tag.
PAGE 2
NORMAL OPERATION POWER SUPPLY: 1). Make sure main power switch is off. Be sure the unit matches the system voltage of aircraft. Plug connector into APU receptacle. 2). Plug the unit into AC power. 117 volts, or 230 if designed for it. 3). Place selector switch in power supply position. 4). Turn ON aircraft master switch. 5). Flip power switch ON. As loads are placed on the bus, the ammeter and voltmeter should indicate the current, and output volts.
PAGE 3
1). NOTHING HAPPENS WHEN MAIN POWER IS TURNED ON. Check connections. Check AC fuse, Check DC circuit breaker. Make sure you are plugged into a live AC circuit. If in power supply position, is your Master switch ON? If in battery charge position, is battery switch on? Slide third pin power switch to other position. 3). AC LINE FUSE OR CIRCUIT BREAKER BLOWS CONTINUALLY: The charger is shorted internally.