York YZ MODEL A - SECTION 5 - MAINTENANCE; PREVENTATIVE MAINTENANCE

JOHNSON CONTROLS
119
FORM 161.01-OM1
ISSUE DATE: 6/8/2018
5
SECTION 5 - MAINTENANCE
PREVENTATIVE MAINTENANCE
It is the responsibility of the owner to provide the re-
quired daily, monthly and yearly maintenance of the
system.
In any operating system it is most important to provide
planned maintenance and inspection of its functioning
parts to keep it operating at peak efficiency. Therefore,
the following maintenance should be performed when
prescribed.
IMPORTANT – If a unit failure occurs
due to improper maintenance during the
warranty period; Johnson Controls will
not be liable for costs incurred to return
the system to satisfactory operation.
Electrical Isolation
1. Isolate the electrical power supply to the chiller
from the facility
2. Isolate the Power Panel battery from the Uninter-
rupted Power Supply by opening the Power Panel
disconnect switch.
3. Isolate plant uid ow to the chiller at appropriate
valves or have refrigerant isolated to prevent free-
wheeling the driveline and generating electrical
energy from the permanent magnet rotor.
TABLE 13 - MAINTENANCE REQUIREMENTS
Procedure Daily Weekly Monthly Yearly Other
Record operating conditions (on applicable Log Form) X
Check operating parameters for indication of tube fouling or
refrigerant loss
X
Check three-phase voltage and current balance X
Check programmable operating setpoints and safety cut-outs.
Make sure they are correct for the application
X
Verify condenser and evaporator water ows X
Leak check and repair leaks as needed
1
X
Check and tighten all electrical connections X
Clean or backush VSD heat exchanger X
Replace VSD starter coolant X
Measure motor winding and insulation resistance X
Perform refrigerant analysis
1
X
Review operating data for trends which indicate increasing
vibration or power consumption. The MBC data includes 1 x
rotational speed vibration in displacement.
X
Clean tubes X
2
Perform Eddy current testing and inspect tubes 2-5 Years
For operating and maintenance requirements listed above, refer to appropriate service literature, or contact your local Johnson Controls
Service Ofce.
1
This procedure must be performed at the specied time interval by an Industry Certied Technician who has been trained and qualied
to work on this type of YORK equipment. A record of this procedure being successfully carried out must be maintained on le by the
equipment owner should proof of adequate maintenance be required at a later date for warranty validation purposes.
2
More frequent service may be required depending on local operating conditions.
MAINTENANCE REQUIREMENTS FOR YZ CHILLERS