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SAFETY
CONSIDERATIONS
Installing,
starting
up, and servicing
air-conditioning
equipment
can be hazardous
due to system
pressures,
electrical
components,
and equipment
location
(roofs,
elevated
structures,
etc.).
Only
trained,
qualified
installers
and service
mechanics
should
install, start-up,
and service
this equipment.
Untrained
personnel
can perform
basic maintenance
flmctions
such
as cleaning
coils.
All other
operations
should
be performed
by
trained
service personnel.
When
working
on the
equipment,
observe
precautions
in the
literature
and
on
tags,
stickers,
and
labels
attached
to
the
equipment.
Follow
all safety codes. Wear safety glasses and work gloves.
Keep
quenching
cloth and fire extinguisher
nearby
when
brazing.
Use
care in handling,
rigging,
and setting bulky equipment.
Read
these
instructions
thoroughly
and follow
all warnings
or
cautions
included
in literature
and
attached to the unit.
Consult
local
building
codes
and National
Electrical
Code
(NEC)
for
special
requirements.
Recognize
safety
information.
This
is the
safety-alert
symbol/_.
When you see this symbol
on the unit and
in instructions
or manuals,
be alert to the potential
for personal
injury.Understand
these signal words: DANGER,
WARNING,
and
CAUTION.
These
words
are used with the safety-alert
symbol.
DANGER
identifies
the most
serious
hazards
which
will result
in
severe
personal
injury
or death.
WARNING
signifies
hazards
which could
result in personal
injury or death.
CAUTION
is used
to identify
unsafe
practices
which
may
result
in nfinor
personal
injury or product
and property
damage.
NOTE
is used to highlight
suggestions
which
will result in enhanced
installation,
reliability,
or
operation.
ELECTRICALSHOCK
HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing, modifying, or servicing system, main
electrical
disconnect
switch
must
be in the OFF
position. There may be more than 1 disconnect switch.
Lock out and tag switch with a suitable warning label.
EXPLOSION
HAZARD
Failure to follow this warning could
result in death, serious personal iniury,
and/or property damage.
Never
use air or gases
containing
oxygen for leak testing or operating
refrigerant compressors.
Pressurized
nfixtures of air or gases containing
oxygen can lead to an explosion.
EQUIPMENT
DAMAGE HAZARD
Failure to follow
this caution may result in equipment
damage or improper operation.
Do not bury more than 36 in. (914 ram) of refrigerant pipe
in the ground. If any section of pipe is buried, there must be
a 6 in. (152 ram) vertical rise to the valve connections on
the outdoor units. If more than the recommended length is
buried, refrigerant may nfigrate to the cooler buried section
during extended periods of system shutdown. This causes
refrigerant
slugging
and
could
possibly
damage
the
compressor at start-up.
SYSTEM
REQUIREMENTS
Allow sufficient space for airflow and servicing unit. See Fig. 1
for nfinimuna required distances between unit and walls or ceilings.
Recommended
Connection
Method for Power and Communi-
cation Wiring (To minimize communication
wiring interfer-
enceL
Power Wiring:
The main power is supplied to the outdoor unit. The field supplied
connecting cable from the outdoor unit to indoor unit consists of
three (3) wires and provides the power for the indoor unit. Two
wires are high voltage AC power and one is a ground wire.
Consult
your local building
codes
and the NEC (National
Electrical Code) or CEC (Canadian Electrical Code) for special
requirements.
All wires must be sized per NEC or CEC and local codes. Use
Electrical Data table MCA (nfininmm circuit amps) and MOCP
(naaxinmm over current protection) to correctly size the wires and
the disconnect fuse or breakers respectively.
Per caution note, only copper conductors with a nfinimuna 300 volt
rating and 2/64-inch thick insulation must be used.
Communication
Wiring:
A separate shielded copper conductor only, with a nfinimun_ 300
volt rating and 2/64-inch
thick insulation, must be used as the
communication wire from the outdoor unit to the indoor unit.
To nfininfize voltage drop of the control wire, use the following
wire size and maxinmna lengths shown in the chart below:
Wire Size
Length
ft (m)
18 AWG
50 (15)
16 AWG
50 (15) to 100 (30)
When installing in an application where there is high
electrical frequency all wires should be shielded.
EQUIPMENT
DAMAGE HAZARD
Failure to follow
this caution may result in equipment
damage or improper operation.
• Wires should be sized based on NEC and local codes.
• Use copper conductors only with a nfinimuna 300 volt
rating and 2/64 inch thick insulation.
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