Preventative Maintenance; Replacement Procedures - York YAST026 Installation Manual

AFFINITY DUAL-CAPACITY OUTDOOR SPLIT SERIES INSTALLATION MANUAL
Preventive Maintenance
Water Coil Maintenance
1. Keep all air out of the water. An open loop system should be
checked to ensure that the well head is not allowing air to
infiltrate the water line. Lines should always be airtight.
2. Keep the system under pressure at all times. It is
recommended in open loop systems that the water control
valve be placed in the discharge line to prevent loss of
pressure during off cycles. Closed loop systems must have
positive static pressure.
NOTE: On open loop systems, if the installation is in an area with
a known high mineral content (125 PPM or greater) in the water,
it is best to establish with the owner a periodic maintenance
schedule so the coil can be checked regularly. Should periodic
coil cleaning be necessary, use standard coil cleaning procedures
which are compatible with either the cupronickel or copper water
lines. Generally, the more water flowing through the unit the less
chance for scaling.

Replacement Procedures

Obtaining Parts
When ordering service or replacement parts, refer to the model
number and serial number of the unit as stamped on the serial
plate attached to the unit. If replacement parts are required,
mention the date of installation of the unit and the date of failure,
along with an explanation of the malfunctions and a description of
the replacement parts required.
Other Maintenance
Filters
Filters must be clean to obtain maximum performance. They
should be inspected monthly under normal operating conditions
and be replaced when necessary. Units should never be operated
without a filter.
Condensate Drain
In areas where airborne bacteria produce a slime in the drain pan,
it may be necessary to treat chemically to minimize the problem.
The condensate drain can pick up lint and dirt, especially with dirty
filters. Inspect twice a year to avoid the possibility of overflow.
Blower Motors
ECM blower motors are equipped with sealed ball bearings and
require no periodic oiling.
Air Coil
The air coil must be cleaned to obtain maximum performance.
Check once a year under normal operating conditions and, if dirty,
brush or vacuum (with a brush attachment) clean. Care must be
taken not to damage the aluminum fins while cleaning.
CAUTION: Fin edges are sharp.
In-Warranty Material Return
Material may not be returned except by permission of authorized
warranty personnel. Contact your local distributor for warranty
return authorization and assistance.
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