7
Floor Mounted
Make sure the unit is level and mounted on a field-supplied
platform and rubber pads with a minimum height to ensure
proper fall on the condensate line. A slope of no less than
2% is recommended. Other installation provisions may be
necessary according to job specifications.
Suspended
The HPX horizontal water source heat pump is equipped
with steel hanging mounts for suspended installations. The
unit should be lifted into position by supporting the unit
with the skid used for shipping. Suspend the unit from its
four corners with field supplied 3/8 “all-thread” rods.
Secure the rods into the holes in the steel hanging mounts
and secure with nuts and lock-washers.
Duct Work
For new installations duct work should be designed and
installed using current ASHRAE procedures which take into
consideration proper air-flow, proper distribution, sound
level considerations, efficiency, durability, safety, etc.
For existing duct systems please make sure unit fits the duct
system in the aspects of flow rate, pressure drop, insulation
and sound level. Any air leaks in existing system should be
found and repaired.
Flexible connectors are important for connections of unit to
metal ductwork to eliminate transfer of vibrations. Duct-
work should be properly insulated to avoid energy loss and
condensation during the cooling cycle.
Sealing
It is very important to keep outside air from infiltrating the
unit cabinet. Seal all piping penetrations with Armaflex,
Permagum, or other suitable sealant. Also seal around drain
connections, electrical connections, and all other inlets
where air may enter the cabinet. This is especially important
when the unit is installed in an unconditioned area.
Supplementary Cooling / Heating
When heat is called for, unit shall switch to mechanical
heating. Should the unit have hot water, or steam
capabilities, it shall be activated according to controls.
Unit with Hot Water Coil
Water supply lines must be insulated, properly fastened,
drained and supported according to the local code require-
ments.
Unit with Steam Coils
The unit MUST be installed high enough to allow for a
minimum of one (1) foot condensate drop leg off of the
steam coil (or as recommended by the steam trap manu-
facturer). Lines should be insulated with approved insulat-
ion and be properly fastened, sloped and supported
according to local code requirements.
Unit with Water-Side Economizer
Water supply lines must be insulated with closed cell type
pipe insulation or insulation that includes a vapor barrier.
Lines should be properly fastened, drained and supported
according to local code barriers.
Water Line Piping
Connect water supply and return lines to water inlet and
outlet. Flexible hose may be used for waterline to reduce
vibration and improve unit serviceability. Make sure hoses
and or pipes are suitable for water system pressure and
sized for proper flow-rate.
Galvanized pipe or fittings are
NOT recommended for use with
the HPX Series heat pumps due
to possible galvanic corrosion.
All plumbing, both supply and
discharge water lines must be
sized to handle water flow with
a proper pressure drop.
Pipe will sweat if low temperature water run through the
supply and discharge lines. These lines should be insulated
to prevent damage from condensation.
Solenoid valves if used should be a slow closing diaphragm
type. If not, water hammer may occur on unit start-up and
shut-down. Placing the solenoid valve on the outlet side of
the system helps in the mitigation of this situation.