Johnson Controls YVAHP0721CW Series, Service Manual

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SM-16007
INSTALLATION
Ɣ Before installation is complete, make sure that the refrigerant leak test has been performed. If
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contact your service contractor. Refrigerant (Fluorocarbon) for this unit is odorless. If the refrigerant
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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 cycle will become subjected to extremely high pressure, which can cause an explosion or
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Ɣ When maintaining, relocating, and disposing of the unit, dismantle the refrigerant piping after the
compressor stops.
Ɣ When pipes are removed out from under the piping cover, after the insulation work is completed,
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covered, the unit may be damaged if snow, rain water or small animals enter the unit.
Ɣ Do not apply an excessive force to the spindle valve at the end of opening. Otherwise, the spindle
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otherwise, these devices will be damaged. (It is closed before shipment.)
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failure of the outdoor unit.
Ɣ The refrigerant system may be damaged if the slope of the piping connection kit e15
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.
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 Perform all electrical work in strict accordance with this manual and all the relevant regulatory
standards.
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 The new air conditioner may not function normally in the following instances:
Ɠ If electrical power for the new air conditioner is supplied from the same transformer as the device*
referred to below.
Ɠ If the power source cables for this device* and the new air conditioner unit are located in close
proximity to each other.
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device, arc furnace, electric furnace, large-sized induction motor and large-sized switch.
Regarding the cases mentioned above, surge voltage may be inducted into the power supply
cables for the packaged air conditioner due to a rapid change in power consumption of the
device and an activation of a switch.
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power supply for the new air conditioner unit.
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.
Ɣ Use an exclusive power supply for the air conditioner at the unit’s rated voltage.