Safety Considerations - Carrier 48HC Installation Instructions Manual

Outdoor Air Temperature (OAT) Sensor
EconoMi$er2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . .
Space Temperature (SPT) Sensors
Indoor Air Quality (CO
Outdoor Air Quality Sensor
Space Humidity Sensor or Humidistat
Smoke Detector/Fire Shutdown (FSD)
Connecting Discrete Inputs
Communication Wiring - - Protocols
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Local Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RTU Open Troubleshooting
Outdoor Air Enthalpy Control
Differential Enthalpy Control
Return Air Enthalpy Sensor
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 14 - - Adjust Factory- - Installed Options
Step 15 - - Install Accessories
START- - UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . .

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/NFPA70, National
Electrical Code (NEC); in Canada, CSA C22.1) for special
requirements.
It is important to 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 the signal words DANGER, WARNING,
CAUTION, and NOTE. 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 minor personal injury or
product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation,
reliability, or operation.
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alteration, service,
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FIRE, EXPLOSION HAZARD
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Failure to follow this warning could result in personal
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
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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
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Pa), it must be replaced before use. When pressure
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testing field- - supplied gas piping at pressures of 0.5
psig (3450 Pa) or less, a unit connected to such piping
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must be isolated by closing the manual gas valve.
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ELECTRICAL SHOCK HAZARD
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Failure to follow this warning could cause personal
injury or death.
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Before performing service or maintenance operations
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on unit, always turn off main power switch to unit and
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install lock(s) and lockout tag(s). Unit may have more
than one power switch.
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UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
Puronr (R- - 410A) refrigerant systems operate at
higher pressures than standard R- - 22 systems. Do not
use R- - 22 service equipment or components on Puron
refrigerant equipment.
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PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal
injury or death.
Relieve pressure and recover all refrigerant before
system repair or final unit disposal.
Ware safety glasses and gloves when handling
refrigerants. Keep torches and other ignition sources
away from refrigerants and oils.
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CUT HAZARD
Failure to follow this caution may result in personal
injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing, safety
glasses and gloves when handling parts and servicing
air conditioning equipment.
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WARNING
WARNING
WARNING
WARNING
CAUTION