Johnson Controls YVAHP0721CW Series, Service Manual

Page: 137 / 416

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 uses
RQO\UHIULJHUDQWVWKDWKDYHEHHQDSSURYHGIRUXVHLQWKHXQLW¶VLQWHQGHGKRPHFRXQWU\RUPDUNHW-RKQVRQ
Controls distributors similarly are only authorized to provide refrigerants that have been approved for use in the
FRXQWULHVRUPDUNHWVWKH\VHUYH7KHUHIULJHUDQWXVHGLQWKLVXQLWLVLGHQWL¿HGRQWKHXQLW¶VIDFHSODWHDQGRULQWKH
DVVRFLDWHGPDQXDOV$Q\DGGLWLRQVRIUHIULJHUDQWLQWRWKLVXQLWPXVWFRPSO\ZLWKWKHFRXQWU\¶VUHTXLUHPHQWVZLWK
regard to refrigerant use and should be obtained from Johnson Controls distributors. Use of any non-approved
refrigerant substitutes will void the warranty and will increase the potential risk of injury or death.
Ɣ If installed in a small room, take measures to prevent the refrigerant from exceeding the maximum allowable
concentration in the event that refrigerant gases should escape. Refrigerant gases can cause asphyxiation
(0.026lbs/ft
3
(0.42 kg/m
3
) based on ISO 5149 for R410A). Consult with your distributor for countermeasures
(ventilation system and so on). If refrigerant gas has leaked during the installation work, ventilate the room
immediately.
Ɣ Before installation is complete, make sure that the refrigerant leak test has been performed. If refrigerant gases
HVFDSHLQWRWKHDLUWXUQ2))WKHPDLQVZLWFKH[WLQJXLVKDQ\RSHQÀDPHVDQGFRQWDFW\RXUVHUYLFHFRQWUDFWRU
Refrigerant (Fluorocarbon) for this unit is odorless. If the refrigerant should leak and come into contact with open
ÀDPHVWR[LFJDVFRXOGEHJHQHUDWHG$OVREHFDXVHWKHÀXRURFDUERQVDUHKHDYLHUWKDQDLUWKH\VHWWOHWRWKH
ÀRRUZKLFKFRXOGFDXVHDVSK\[LDWLRQ
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
VXEMHFWHGWRH[WUHPHO\KLJKSUHVVXUHZKLFKFDQFDXVHDQH[SORVLRQRU¿UH
Ɣ 7LJKWHQWKHÀDUHQXWZLWKDWRUTXHZUHQFKLQWKHVSHFL¿HGPDQQHU'RQRWDSSO\H[FHVVLYHIRUFHWRWKHÀDUHQXW
ZKHQWLJKWHQLQJ,I\RXGRWKHÀDUHQXWFDQFUDFNDQGUHIULJHUDQWOHDNDJHPD\RFFXU
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
7DNHWKHIROORZLQJSUHFDXWLRQVWRUHGXFHWKHULVNRIHOHFWULFVKRFN¿UHRU
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.
Ɣ 8VHVSHFL¿HGFDEOHVEHWZHHQXQLWV
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 8VHDQH[FOXVLYHSRZHUVXSSO\IRUWKHDLUFRQGLWLRQHUDWWKHXQLW¶VUDWHGYROWDJH
Ɣ Be sure to install circuit breakers (ground fault interrupter, isolating switch, molded case circuit breaker and so
RQZLWKWKHVSHFL¿HGFDSDFLW\(QVXUHWKDWWKHZLULQJWHUPLQDOVDUHWLJKWHQHGVHFXUHO\WRUHFRPPHQGHGWRUTXH
VSHFL¿FDWLRQV
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.
60
INSTALLATION