Geostar Magnolia Plus Serie Guide D'installation page 12

DUAL COMPRESSOR PACKAGED HEAT PUMP INSTALLATION GUIDE
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.
Low Water Coil Limit
Set the freeze sensing switch SW2-1 on the Aurora Base
Control (ABC) printed circuit board for applications using
a closed loop antifreeze solution to "LOOP" (15°F). On
applications using an open loop/ground water system (or
closed loop no antifreeze), set this dip switch to "WELL"
(30°F), the factory default setting. (Refer to the DIP Switch
Settings table in the Aurora Control section.)
Condensate Drain
On vertical units, the internal condensate drain assembly
consists of a drain tube which is connected to the drain pan, a
3/4-inch PVC female adapter and a flexible connecting hose.
The female adapter may exit either the front or the side of
the cabinet. The adapter should be glued to the field-installed
PVC condensate piping. On vertical units, a condensate hose
is inside all cabinets as a trapping loop; therefore, an external
trap is not necessary.
On horizontal units, a PVC stub is provided for condensate
drain piping connection. An external trap is required (see
below). If a vent is necessary, an open stand pipe may be
applied to a tee in the field-installed condensate piping.
Figure 5: Horizontal Drain Connection
PVC tube stub
NOTE: Check dimensional data for actual PVC sizes.
Figure 6: Unit Pitch for Drain
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Vent (if needed)
PVC coupling
PVC tube stub
1/8 in. per foot
1.5 in.
1.5 in.
1/2'' Pitch
Drain