Installing The Outdoor Unit; Connecting Refrigerant Tubing Between The Indoor And Outdoor Unit; Installing The Indoor Unit - Nordyne S3BM-120G User's Information And Installation Instructions Manual

Minimum Circuit Ampacity
Electrical wiring to the equipment must be compatible and
in compliance with the minimum circuit ampacity listed
on the outdoor unit data label.
Maximum Fuse/Circuit Breaker Size
Circuit protection for the outdoor unit must be compatible
with the maximum fuse/circuit breaker size listed on the
outdoor unit data label.

INSTALLING THE OUTDOOR UNIT

Slab Mount
The site selected for a slab mount installation requires
a stable foundation and one not subject to erosion. The
slab should be level and anchored (if necessary) prior to
placing the equipment on the slab.
Cantilever Mount
The cantilever mount should be designed with adequate
safety factor to support the weight of the equipment, and
for loads subjected to the mount during operation. Installed
equipment should be adequately secured to the cantilever
mount and levelled prior to operation of the equipment.
Roof Mount
WARNING:
To avoid the risk of property damage, personal
injury, or death, it is the rigger's responsibility
to ensure that whatever means are used to hoist
the unit are safe and adequate:
The lifting equipment must be adequate for
•
the load. Refer to Table 2 (page 9) for unit
weights.
The unit must be lifted from the holes in the
•
base rails using cables or chains.
Keep the unit in an upright position at all
•
times.
The method of mounting should be designed so as not to
overload roof structures or transmit noise to the interior
of the structure. Refrigerant and electrical lines should be
routed through suitably waterproofed openings to prevent
water leaking into the structure.

INSTALLING THE INDOOR UNIT

The indoor section should be installed before proceeding
with routing of refrigerant piping. Consult the installation
instructions of the indoor unit (i.e.: air handler, furnace,
etc.) for details regarding installation.
CONNECTING REFRIGERANT TUBING
BETWEEN THE INDOOR AND OUTDOOR
UNIT
General
Once outdoor and indoor unit placement has been
determined, route refrigerant tubing between the
equipment in accordance with sound installation
practices.
• When connecting refrigerant linesets together, it is
recommended that dry nitrogen be fl owing through the
joints during brazing. This will prevent internal oxidation
and scaling from occurring.
• Refrigerant tubing should be routed in a manner that
minimizes the length of tubing and the number of bends
in the tubing.
• Refrigerant tubing should be supported in a manner
that the tubing will not vibrate or abrade during system
operation.
• Tubing should be kept clean of foreign debris during
installation.
• Every effort should be made by the installer to ensure
that the fi eld installed refrigerant containing components
of the system have been installed in accordance with
these instructions and sound installation practices to
insure reliable system operation and longevity.
• The maximum recommended interconnecting
refrigerant line length is 75 feet, and the vertical elevation
difference between the indoor and outdoor sections
should not exceed 20 feet.
• If precise forming of refrigerant lines is required, a
copper tubing bender is recommended. Avoid sharp
bends and contact of the refrigerant lines with metal
surfaces.
Optional Equipment
Optional equipment such as liquid line solenoid valves,
twinning kit, low ambient, etc., should be installed in
strict accordance with the manufacturer's installation
instructions.
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