7
3.3 - Unit location
The following guidelines should be considered when choosing
a location for a water-source heat pump unit:
•
Units are for indoor use only.
•
Locate in areas where ambient temperatures are between
4.4
°
C and 37.8
°
C 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 minimising sound problems. Since ductwork
is normally applied to these units, the unit can be placed so
that the principal sound emission is outside the occupied
space in sound-critical applications. A fire damper may be
required by the local code if a fire wall is penetrated.
3.3.1 - Field conversion of discharge air
The discharge air of the 50RHE 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
Figs. 3 and 4).
NOTE: It is not possible to convert return air between left or
right return models in the field due to refrigerant piping
changes.
Preparation
The unit should be on the ground in a well-lit area for conversion.
Hung units should be taken down to ground level before con-
verting.
Side to back discharge conversion
1.
Remove screws to free the top and discharge panels (see
Fig. 3).
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 excessive
tension or contact with sheet metal edges. Re-route if
necessary.
5.
Check refrigerant tubing for contact with other components.
Adjust if necessary.
6.
Reinstall top panel using screws set aside in Step 1.
NOTE: Location for some screws at bottom of discharge
panel may have to be changed.
7.
Manually spin fan wheel to check for obstructions. Adjust
for any obstruction found.
8.
Replace access panel.
Back to side discharge conversion
Follow instructions above for side to back discharge conversion,
noting the panels would be reversed.
Fig. 3 - Conversion left return, side discharge to back
discharge
Fig. 4 - Conversion right return, side discharge to
back discharge
Water
connection end
Remove screws
Return air
Side discharge
Water
connection end
Return air
Rotate
Move to side
Water
connection end
Replace screws
Return air
Back discharge
Discharge air
Drain
Return air
Water
connection end
Supply
duct
Side discharge
Return air
Water
connection end
Drain
Back discharge
Discharge air
