Safety Considerations - Carrier WeatherExpert 48LC Installation Instructions Manual

Single package rooftop gas heat/electric cooling unit with puronr (r ---410a) refrigerant size: 07
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SAFETY CONSIDERATIONS

Improper
installation,
adjustment,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause personal injury
or property damage. Consult a qualified installer, service
agency, or your distributor or branch for information or
assistance. The qualified installer or agency must use
factory- - authorized kits or accessories when modifying this
product. Refer to the individual instructions packaged with
the kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA 70,
National Electrical Code (NEC); in Canada, CSA C22.1)
for special requirements.
It is important to recognize safety information. This is the
. When you see this symbol on the
safety- - alert symbol
unit and in instructions or manuals, be alert to the
potential for personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the
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R
X
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alteration,
service,
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safety- - alert symbol. DANGER identifies the most serious
hazards which will result in severe personal injury or
45
death. WARNING signifies hazards which could result in
personal injury or death. CAUTION is used to identify
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unsafe practices, which may result in minor personal
47
injury or product and property damage. NOTE is used to
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highlight suggestions which will result in enhanced
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installation, reliability, or operation.
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!
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48
FIRE, EXPLOSION HAZARD
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Failure to follow this warning could result in personal
49
injury or death.
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Disconnect gas piping from unit when leak testing at
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pressure greater than 0.5 psig (3450 Pa). Pressures
49
greater than 0.5 psig (3450 Pa) will cause gas valve
damage resulting in hazardous condition. If gas valve
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is subjected to pressure greater than 0.5 psig (3450 Pa),
49
it must be replaced before use. When pressure testing
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field- - supplied gas piping at pressures of 0.5 psig
52
(3450 Pa) or less, a unit connected to such piping must
be isolated by closing the manual gas valve.
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!
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56
FIRE HAZARD
.
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Failure to follow this warning could result in personal
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injury, death, and/or property damage.
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Inlet pressure tab set screw must be tightened and
NPT pipe plug must be installed to prevent gas leaks.
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65
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GAS VALVE
INLET PRESSURE
TAP SET SCREW
!
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, and/or property damage.
Manifold pressure tap set screw must be tightened and
1
/
in. NPT pipe plug must be installed to prevent gas
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leak.
MANIFOLD PRESSURE
TAP SET SCREW
2
WARNING
WARNING
WARNING
MANIFOLD
GAS VALVE
1
/
in.
8

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