Johnson Controls YVAHP072B31S, Service Manual

Page: 1206 / 1796

2-286
Service Manual
OPERATION
Ɣ If the wired controller is installed in a location where electromagnetic radiation is generated, make sure that
the wired controller is shielded and cables are sleeved inside conduit tubing.
Ɣ If there is a source of electrical interference near the power source, install noise suppression equipment
¿OWHU
Ɣ During the test run, check the unit’s operation temperature. If the unit is used in an environment where the
temperature exceeds the operation boundary, it may cause severe damage.
&KHFNWKHRSHUDWLRQWHPSHUDWXUHERXQGDU\LQWKHPDQXDO,IWKHUHLVQRVSHFL¿HGWHPSHUDWXUHXVHWKHXQLW
within the operation temperature boundary of 35° to 104°F (0 to 40°C).
Ɣ Read installation and appropriate user manuals for connection with PC or peripheral devices.
If a warning window appears on the PC, the product stops, does not work properly or works intermittently,
immediately stop using the equipment.
Installation Precautions
7DNHWKHIROORZLQJSUHFDXWLRQVWRUHGXFHWKHULVNRIHOHFWULFVKRFN¿UHRU
explosion resulting in serious injury or death:
Ɣ ,IWKHUHPRWHVHQVRUVDUHQRWXVHGZLWKWKLVFRQWUROOHUWKHQGRQRWLQVWDOOWKLVFRQWUROOHU«
Ɠ In a room where there is no thermostat.
Ɠ Where the unit is exposed to direct sunshine or direct light.
Ɠ Where the unit will be in close proximity to a heat source.
Ɠ Where hot/cold air from the outdoors, or a draft from elsewhere (such as air vents, diffusers or grilles)
can affect air circulation.
Ɠ In areas with poor air circulation and ventilation.
Ɣ Perform a test run using the controller to ensure normal operation. Safety guards, shields, barriers, covers,
and protective devices must be in place while the compressor/unit is operating.
'XULQJWKHWHVWUXQNHHS¿QJHUVDQGFORWKLQJDZD\IURPDQ\PRYLQJSDUWV
After installation work for the system has been completed, explain the “Safety Precautions,” use, and maintenance
of the unit to the customer according to the information in all manuals that accompanied the system. All manuals
and warranty information must be given to the user or left near the Indoor Unit.
Electrical Precautions
7DNHWKHIROORZLQJSUHFDXWLRQVWRUHGXFHWKHULVNRIHOHFWULFVKRFN¿UHRU
explosion resulting in serious injury or death:
Ɣ Only use electrical protection equipment and tools suited for this installation.
Ɣ Insulate the wired controller against moisture and temperature extremes.
Ɣ 8VHVSHFL¿HGFDEOHVEHWZHHQXQLWVDQGWKHFRQWUROOHU
Ɣ Communication cabling shall be a minimum of 18-Gauge, 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 The polarity of the input terminals is important, so be sure to match the polarity when using contacts that
have polarity.
Ɣ Highly dangerous electrical voltages may be 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 %HIRUHLQVWDOOLQJWKHFRQWUROOHURUUHPRWHGHYLFHVHQVXUHWKDWWKHLQGRRUDQGRXWGRRUXQLWRSHUDWLRQKDVEHHQ
VWRSSHG)XUWKHUEHVXUHWRZDLWDWOHDVW¿YHPLQXWHVEHIRUHWXUQLQJRIIWKHPDLQSRZHUVZLWFKWRWKHLQGRRURU
outdoor units. Otherwise, water leakage or electrical breakdown may result.
Ɣ Do not open the service cover or access panel to the indoor or outdoor units without turning OFF the main
SRZHUVXSSO\%HIRUHFRQQHFWLQJRUVHUYLFLQJWKHFRQWUROOHURUFDEOHVWRLQGRRURURXWGRRUXQLWVRSHQDQGWDJDOO
disconnect switches. Never assume electrical power is disconnected. Check with a meter and equipment.