Table of Contents
Advertisement
Su
)ly Air
Wiring
Building
Flexible
Loop
Connection
Waterr
Out
Water__
In
Stainless
stee
braid
hose
with integral
"J" swivel
(fieldqnstalled
Balancing
Valve
(fieldqnstalled
accessory)
i
Low Pressure
]
Drop Water
Control
Valve
] (optional)
(field-installed
, accessory)
Ball Valve
with optional
integral
P/T plug
Compressor
(typical
for supply
and
Access
Panel
return piping)
(fieldqnstalled
accessory)
NOTE: Ball valve with integral pressure temperature
plug recommended.
Fig. 5 -- Typical
Vertical
Installation
-- 50PTV
Unit
Flexible
Building
Connection
Loo
Balancing
Valve
(field-installed
Drop Water
)ontrol Valve
i
(optional)
(field-installed
Wiring
accessory)
Compressor
Access Panel
with
optional integral
Flexible
_:i
Connection
PIT plug (typical for
.... ii,,_
supply and return
Supply Air
piping)(field-installed
accessory)
NOTE: Ball valve with integral pressure temperature
plug recommended.
Fig. 6 -- Typical Downflow Installation --
50PTD Unit
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.
Install
the unit on a piece of rubber,
neoprene
or other
mounting
pad
material
for sound
isolation.
The
pad
should
be at least 3/8 in. [10 mm] to 1/2 in. [13 1run] in
thickness.
Extend
the pad beyond
all four edges
of the
unit.
Provide
adequate
clearance
for filter replacement
and
drain pan cleaning.
Do not block filter access with pip-
ing, conduit
or other materials.
Refer to Fig. 1, 3, and 4
for dimensional
data.
Provide
access
for fan and fan motor
maintenance
and
for servicing
the compressor
and coils without
removing
the unit.
•
Provide
an unobstructed
path to the unit within the closet
or mechanical
room. Space should be sufficient
to allow
removal
of the unit, if necessary.
•
In limited
side access
installations,
pre-removal
of the
control box side mounting
screws will allow control box
removal
for future servicing.
•
Provide
access
to water valves
and fittings
and screw-
driver access to the unit side panels,
discharge
collar and
all electrical
connections.
NOTE: Correct placement
of the horizontal
unit can play an
important
part in lninimizing
sound problems.
Since duct-
work 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 50PTH
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.
Water
Return Air
................
Co, _ ,ection_
End
/
r::2
i
i
Side Discharge
Water
Connection End
Drain
/
Discharge Air
Back Discharge
Fig. 7 -- Conversion Right Return,
Side Discharge to Back Discharge
Preparation
-- The unit should be on the ground in a well lit
area. Hung units should be taken down to ground level before
converting.
Side to Back Discharge
Conversion
1. Remove screws to free the top and discharge panels. Set
screws aside for later use. See Fig. 8.
2. Remove the access panel and set aside.
3. Lift the discharge panel from side of unit and rotate it to
back using care not to damage blower wiring.
4. Check
blower wire routing and connections
for undue
tension
or contact
with sheet metal edges. Re-route
if
necessary.
Advertisement
Table of Contents
