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975-0395-01-01 7
Basic Installation Procedures
This guide for use by qualified installers only.
AC shore power
A source of 120 volts, 60Hz sine wave alternating current is needed to
provide energy to charge batteries and pass power through to AC loads.
This source is usually the utility grid (power company) or an AC generator.
An automatic or manual AC source selector switch can be used to switch
between the multiple sources of shore power to the Freedom HF system.
The AC source feeding the Freedom HF must have the neutral conductor
bonded to ground. When the inverter passes shore power through, it will lift
the bonding relay on the output and will rely on the input being bonded in
order to ensure that the power delivered to a sub panel is properly bonded.
See “AC Output Neutral Bonding” on page 9 for more information on
bonding relay operation.
Generator
The Freedom HF is compatible with most generators which produce
nominal 120 volts AC 60Hz sine wave AC power.
Since the DC charging current limit of the Freedom HF may be configured
to provide as little as 2 amps it is possible to use very small generators with
the Freedom HF to charge batteries. The Freedom HF has been tested with
generators of various sizes, including some as small as 700 watts.
AC Disconnect and Over-Current Protection Device
Most safety requirements and electrical codes require the Freedom HF’s
AC and DC inputs and outputs to be provided with over-current protection
(such as circuit breakers or fuses) and disconnect devices.
AC Input: The circuit breaker or fuse (connected through hard wiring)
that is used to supply the Freedom HF must be rated at no more than 30A
and must be approved for use on 120 volts AC branch circuits. The wire
used between the breaker and the Freedom HF input must be sized
adequately to carry current up to the rating of the input breaker and in
accordance with the electrical codes or regulations applicable to your
installation.
AC Output: The circuit breaker or fuse must be rated at no more than the
rating of the input breaker in the installation and must be approved for use
on 120 volts AC branch circuits. The wire used between the Freedom HF
and the AC output breaker must be of adequate size to match the AC input
circuit breaker’s rating. The wiring from each AC output breaker to each of
the loads must be adequately sized to carry the current rating of the
individual AC output breaker.
Disconnect Devices: Each system requires a method of disconnecting the
AC circuits. If the over-current protection devices are circuit breakers, they
will also serve as the disconnects. If fuses are used, separate AC disconnect
switches will be needed ahead of the fuses. These will have to be a branch
circuit rated for 120 volts AC and have an appropriate current rating.
IMPORTANT:
Throughout this manual, the term “shore power” refers to
AC input power from a utility grid, generator, or other AC source.
Freedom HF Install Guide.book Page 7 Thursday, November 24, 2011 11:06 AM