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Step 3 — Locate Unit — The following guidelines
should be considered when choosing a location for a WSHP:
• Units are for indoor use only.
• Locate in areas where ambient temperatures are between
39 F and 102 F and relative humidity is no greater than
75%.
• Provide sufficient space for water, electrical and duct
connections.
• Locate unit in an area that allows easy access and removal
of filter and access panels.
• Allow enough space for service personnel to perform
maintenance.
• Return air must be able to freely enter the space if unit needs
to be installed in a confined area such as a closet.
NOTE: Correct placement of the horizontal unit can play an
important part in minimizing sound problems. Since
ductwork is normally applied to these units, the unit can be
placed so that the principal sound emission is outside the oc-
cupied space in sound-critical applications. A fire damper
may be required by the local code if a fire wall is penetrated.
FIELD CONVERSION OF DISCHARGE AIR — The dis-
charge air of the 50PSH horizontal units can be converted
between side and back discharge in the field. The conversion
process is the same for right and left return configurations. See
Fig. 7 and 8.
NOTE: It is not possible to convert return air between left or
right return models in the field due to refrigerant piping
changes.
Return
Air
Power
Thermostat
Wiring
Compressor
Access Panel
Balancing Valve
(field-installed
accessory)
Low Pressure
Drop Water
Control Valve
(optional)
(field-installed
accessory)
Ball Valve with optional
integral P/T plug
(typical for supply and
return piping) (field-Installed
accessory)
Water
Out
Water
In
Building
Loop
Supply Air
Flexible
Connection
Stainless steel
braid hose
with integral
“J” swivel
(field-installed
accessory)
Return
Air
Power
Thermostat
Wiring
Compressor
Access Panel
Balancing Valve
(field-installed
accessory)
Low Pressure
Drop Water
Control Valve
(optional)
(field-installed
accessory)
Ball Valve with
optional integral
P/T plug (typical for
supply and return
piping)(field-installed
accessory)
Water
Out
Water
In
Building
Loop
Supply Air
Flexible
Connection
Flexible
Connection
Stainless
steel
braid hose
with
integral ”J”
swivel(field-
installed
accessory)
NOTE: Ball valve with integral pressure temperature plug recommended.
Fig. 5 — Typical Vertical Installation — 50PSV Unit
NOTE: Ball valve with integral pressure temperature plug recommended.
Fig. 6 — Typical Downflow Installation —
50PSD Unit
A50-7730
A50-7729
Return Air
Remove Screws
Return Air
Rotate
Move to Side
Side Discharge
Return Air
Discharge Air
Drain
Back Discharge
Replace Screws
Water
Connection End
Water
Connection End
Water
Connection End
Fig. 7 — Conversion Left Return,
Side Discharge to Back Discharge
A50-6256
Water
Connection End
Supply
Duct
Return Air
Water
Connection End
Drain
Return Air
Discharge Air
Side Discharge
Back Discharge
Fig. 8 — Conversion Right Return,
Side Discharge to Back Discharge
A50-6257