Initial Inspection; Location; Water Quality - Bosch LV Series Installation And Maintenance Manual

LV Heat Pump Series

INITIAL INSPECTION

Be certain to inspect all cartons or crates on each
unit as recieved at the job site before signing the
freight bill. Verify that all items have been received
and that the there is no visible damage. Note any
damage or shortage on all copies of the freight bill.
In the event of damage or a shortage it is the
responsiblity of the purchaser to file the necessary
claims with the carrier. Concealed damage not
discovered until after removing the units from
pacakaging must be reported to the carrier within
24 hours of receipt.

LOCATION

Locate the unit in an indoor area that allows easy
access to the filter, front access panel and blower
access panel, and has enough room for service
personnel to perform maintenance and repair
work. Provide sufficient room to make fluid,
electrical and ductwork connections.
Locate the unit in conditioned space and avoid
installation in corrosive environments.
If the unit is installed in a confined space, such as
a closet, provisons must be made for return air to
freely enter the the face of the unit's air coil.
Unit condensate drains are not internally trapped.
Allow room below the unit base for horizontal and
counterflow models for an adequate condensate
trap.
Do not locate the unit above supply piping.
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Do not locate the unit in areas subject to
freezing or in areas subject to temperature
or humidity extremes.
LV series packaged units are not approved
for outdoor installation. Units must be
installed in conditioned space that is not
subject to extremes of temperature or
humidity to avoid cabinet sweating and/or
equipment damage.
Do not use LV series units for temporary
heating, air conditioning or ventilation
during construction, especially when
plastering, sanding or painting. Care should
be taken to avoid introduction of dust, paint
or debris into the air coil.
LV Heat Pump Series

WATER QUALITY

Failure to insure proper water quality and
flow rates can shorten the life of the heat
pump and potentially void the unit
warranty.
Maintaining proper water quality is important for
insuring a long and trouble free service life for an
LV series heat pump.
For closed loop and boiler/tower systems water
chemistry can be checked and easily maintained to
insure that corrosive elements, dissolved oxygen
and pH levels are kept in check. It is important to
insure that any additive, antifreeze or corrosion
inhibitor that is added to the water loop is
compliant with all applicable laws and regulations
and is compatible with copper, brass and bronze
alloys. Insure that all recommended safety
precautions are followed when handling or adding
chemicals to the water loop.
For open loop systems, water quality is very
important. Table #1 shows acceptable ranges for
a variety of water quality factors. The three main
concerns in open loop installations are scaling,
corrosion and fouling.
In installations with hard water, scaling due to a
buildup of carbonates on the heat exchanger wall
can gradually degrade the heat pump performance
over time. Heat pumps that are affected by scaling
may exhibit low suction pressures in heating and
high head pressures in cooling with a gradual loss
of capacity and efficiency. Scaled heat exchangers
can be cleaned by a qualified technician but care
should be taken to avoid scaling in the first place.
To limit scaling, water flow rates should be kept at
3 gallons/minute per nominal cooling ton (a 10°F
temperature rise in cooling) and care should be
taken to avoid air in the water lines from suction
side leaks. Cupro-nickel coils are generally
recommended.
In installations with high hydrogen sulfide, chlorine
or ammonia, corrosion is a potential problem. In
these installations a cupro-nickel heat exchanger is
recommended along with maintaining proper flow
and keeping air out of the system. If water quality
is outside of the values in Table #1, then a closed
loop is recommended.
Initial Inspection | 5
8 733 905 683 (2013/04)