Johnson Controls YVAHP072B31S, Service Manual

Page: 849 / 1796

Refrigerant Precaution
To reduce the risk of serious injury or death, the following refrigerant
precautions must be followed.
Ɣ As originally manufactured, this unit contains refrigerant installed by Johnson Controls. Johnson Controls
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Johnson Controls distributors similarly are only authorized to provide refrigerants that have been approved
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faceplate and/or in the associated manuals. Any additions of refrigerant into this unit must comply with
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distributors. Use of any non-approved refrigerant substitutes will void the warranty and will increase the
potential risk of injury or death.
Ɣ 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.
Ɣ Before installation is complete, make sure that the refrigerant leak test has been performed. If refrigerant
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contractor. Refrigerant (Fluorocarbon) for this unit is odorless. If the refrigerant should leak and come into
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Ɣ 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
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Ɣ A compressor/unit comprises a pressurized system. Never loosen threaded joints while the system is under
pressure and never open pressurized system parts.
Ɣ 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.
Ɣ 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.
Ɣ Before servicing, open and tag all disconnect switches. Never assume electrical power is disconnected.
Check with meter and equipment.
Ɣ Only use electrical protection equipment and tools suited for this installation.
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Ɣ 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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Ɣ Be sure to install circuit breakers (ground fault interrupter, isolating switch, molded case circuit breaker and
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Ɣ 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