York LX series, Руководство по установке

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9
General Installation Information cont.
Water Quality
It is the responsibility of the system designer and installing
contractor to ensure that acceptable water quality is present and
that all applicable codes have been met in these installations.
Failure to adhere to the guidelines in the water quality table could
result in loss of warranty. In ground water situations where scaling
could be heavy or where biological growth such as iron bacteria
will be present, a closed loop system is recommended. The heat
exchanger coils in ground water systems may, over a period of
time, lose heat exchange capabilities due to a buildup of mineral
deposits inside. These can be cleaned, but only by a qualified
service mechanic, as special solutions and pumping equipment
are required. Hot water generator coils can likewise become
scaled and possibly plugged. In areas with extremely hard water,
the owner should be informed that the heat exchanger may require
occasional flushing.
Units with cupronickel heat exchangers are recommended for
open loop applications due to the increased resistance to build-up
and corrosion, along with reduced wear caused by acid cleaning.
Failure to adhere to the guidelines in the water quality table could
result in the loss of warranty.
Water Treatment
Do not use untreated or improperly treated water. Equipment
damage may occur. The use of improperly treated or untreated
water in this equipment may result in scaling, erosion, corrosion,
algae or slime. Purchase of a pre-mix antifreeze could significantly
improve system reliability if the water quality is controlled and there
are additives in the mixture to inhibit corrosion. There are many
examples of such fluids on the market today such as Environol™
1000 (pre-mix ethanol), and others. The services of a qualified
water treatment specialist should be engaged to determine what
treatment, if any, is required. The product warranty specifically
excludes liability for corrosion, erosion or deterioration of
equipment.
The heat exchangers and water lines in the units are copper
or cupronickel tube. There may be other materials in the
buildings piping system that the designer may need to take into
consideration when deciding the parameters of the water quality. If
antifreeze or water treatment solution is to be used, the designer
should confirm it does not have a detrimental effect on the
materials in the system.
Contaminated Water
In applications where the water quality cannot be held to
prescribed limits, the use of a secondary or intermediate heat
exchanger is recommended to separate the unit from the
contaminated water. The table on the next page outlines the water
quality guidelines for unit heat exchangers. If these conditions
are exceeded, a secondary heat exchanger is required. Failure to
supply a secondary heat exchanger where needed will result in a
warranty exclusion for primary heat exchanger corrosion or failure.
LX SERIES INSTALLATION MANUAL