Johnson Controls York YHAU-C, Installation, Operation And Maintenance Manual

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This chiller is for air conditioning or a cooling manufacturing process. Transport, store, and use the
chiller under the following conditions:
Installation location Indoor, non-explosion area
Ambient temperature 50°F ~ 104°F
Humidity 10 ~ 90% (RH%)
Altitude 3333 ft or lower
If the plant room is colder than 50°F, you must have the cold ambient option for outside
installation.
Inspection
The unit must be inspected before customer use by a Johnson Controls Service representative. All
damage or possible damage must be reported to the transportation company. For further details,
see Commissioning .
Note: If the chiller is shipped as dry shipment, the N
2
in the chiller is charged to 4 psig on the
shell side. The solution and refrigerant water is shipped separately in barrels.
Installation guidelines
When evacuating the nitrogen charge (from the factory), ensure the area is correctly ventilated.
Failure to do this could result in suffocation.
When storing the absorption chiller unit after it has been delivered, note the following potential
issues:
1. Problems with machine in storage:
a. Breaking of thin pipes caused by freezing of the refrigerant (water) sealed in the
machine and resulting air leak (if solution and refrigerant is charged).
b. Breaking and air leak due to external damage
c. Deterioration of electrical parts caused by soot and dust
d. Deterioration of electrical parts caused by rainwater (moisture)
e. Rusting of the machine body caused by rainwater (moisture). Air leaks can cause serious
damage and are costly repairs. Use diligence in keeping the machine body free from
moisture at all times.
2. Problems and preventative measures
Problem Preventative measure
Freezing of
refrigerant in machine
Store the machine where the ambient temperature is higher than 32°F. If the ambient
temperature drops lower than 32°F, use a heater to warm the machine. If a heater is not
accessible, the following options are also available to prevent freezing:
• Extraction of the refrigerant
• Addition of antifreeze to the refrigerant
• Installation of a band heater
For further instruction, contact your nearest authorized Johnson Controls Service Center.
External damage
Avoid storing the machine in a place that is easily accessible or near a construction site. If this is
unavoidable, provide the machine with suitable protection.
21 YHAU-C Single Effect Steam-Fired Absorption Chiller