Refrigerant Precaution
To reduce the risk of serious injury or death, the following refrigerant
precautions must be followed.
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As originally manufactured, this unit contains refrigerant installed by Johnson Controls. Johnson
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or market. Johnson Controls distributors similarly are only authorized to provide refrigerants that
have been approved for use in the countries or markets they serve. The refrigerant used in this unit is
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from Johnson Controls distributors. Use of any non-approved refrigerant substitutes will void the
warranty and will increase the potential risk of injury or death.
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If installed in a small room, take measures to prevent the refrigerant from exceeding the maximum
allowable concentration in the event that refrigerant gases should escape. Refrigerant gases can
cause asphyxiation (0.026lbs/ft
3
(0.42 kg/m
3
) based on ISO 5149 for R410A). Consult with your
distributor for countermeasures (ventilation system and so on). If refrigerant gas has leaked during the
installation work, ventilate the room immediately.
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Before installation is complete, make sure that the refrigerant leak test has been performed. If
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your service contractor. Refrigerant (Fluorocarbon) for this unit is odorless. If the refrigerant should leak
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When installing the unit, and connecting refrigerant piping, keep all piping runs as short as possible,
and make sure to securely connect the refrigerant piping before the compressor starts operating.
If the refrigerant piping is not connected and the compressor activates with the stop valve opened,
the refrigerant cycle will become subjected to extremely high pressure, which can cause an
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A compressor/unit comprises a pressurized system. Never loosen threaded joints while the system is
under pressure and never open pressurized system parts.
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When maintaining, relocating, and disposing of the unit, dismantle the refrigerant piping after the
compressor stops.
Electrical Precautions
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explosion resulting in serious injury or death.
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Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and
these instructions when wiring. Improper connections and inadequate grounding can cause serious injury
or death.
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Before servicing, open and tag all disconnect switches. Never assume electrical power is disconnected.
Check with meter and equipment.
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Only use electrical protection equipment and tools suited for this installation.
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Communication cabling shall be a minimum of AWG18 (0.82mm
2
), 2-Conductor, Stranded Copper.
Shielded cable must be considered for applications and routing in areas of high EMI and other sources
of potentially excessive electrical noise to reduce the potential for communication errors. When shielded
cabling is applied, proper bonding and termination of the cable shield is required as per Johnson Controls
guidelines. Plenum and riser ratings for communication cables must be considered per application and
local code requirements.
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Be sure to install circuit breakers (ground fault interrupter, isolating switch, molded case circuit breaker and
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Clamp electrical wires securely with a cord clamp after all wiring is connected to the terminal block. In
addition, run wires securely through the wiring access channel.
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INSTALLATION
Summary of Contents for YVAHP072B31S
Page 2: ......
Page 10: ...viii Service Manual ...
Page 16: ......
Page 17: ...Service Manual 1 1 INSTALLATION 1 Installation ...
Page 577: ...Service Manual 1 561 INSTALLATION 9 Touch Back to return to the Service Menu screen 9 ...
Page 920: ......
Page 921: ...Service Manual 2 1 OPERATION 2 Operation ...
Page 1315: ...Service Manual 3 1 TROUBLESHOOTING 3 Troubleshooting ...
Page 1461: ...Service Manual 4 1 MAINTENANCE 4 Maintenance ...
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Page 1729: ...Service Manual 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Page 1738: ...6 10 Service Manual FIELD WORK INSTRUCTIONS 6 8 Mollier Chart for R410A ft 3 l b ...
Page 1739: ...SERVICE PARTS LIST Service Manual 7 1 7 Service Parts List ...
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Page 1796: ... 2015 Johnson Controls Inc SM 15001 ...