5
HEat PumP inStallation
unpacking the unit
It is recommended that the unit be unpacked at the
installation site to minimize damage due to handling.
caution:
Do not tip the unit on its side. oil may enter the
compressor cylinders and cause starting trouble.
if unit has been set on its side, restore to upright
position and do not run for several hours. then
run unit for a few seconds. Do this three or four
times with five minutes between runs.
1. Remove the bands from around the unit.
2. Unfold the top and bottom cap flanges.
3. Carefully remove the top cap and tube.
minimum clearances
Minimum clearances MUST be maintained from adjacent
structures to provide room for proper servicing and air
circulation. DO NOT install unit in a confined or recessed
area that will allow discharge air from the unit to re-circulate
into the condenser air inlet, through the coil. See
Figure
1 (page 4)
.
Service Access Clearances
Blower access panel side .......................................... 24”
Electrical compartment access panel side ............... 12”
Clearance between overhang and top of unit ........ 72”
Clearance around condenser coil area to wall or
shrubs (excludes duct panel side) ............................. 12”
Clearances to Combustible Materials
Supply and return air ducts ..........................................0”
Duct connection side ...................................................0”
duct must be sufficiently large to conduct an adequate
amount of air to each register. See
Figure 3 (page 6)
.
• Duct work should be attached directly to the unit flanges
for horizontal applications.
• For highly resistive duct systems it may be necessary
to add an additional return air duct and or supply to
achieve maximum performance and prevent coil icing
and refrigerant flood back
Unconditioned Spaces
All duct work passing through unconditioned space must
be properly insulated to minimize duct losses and prevent
condensation. Use insulation with an outer vapor barrier.
Refer to local codes for insulation material requirements.
the heat pump system will not cool or heat the home
if air is lost to the outside through leaks in the duct
system. Ducts that are collapsed or restricted by
foreign objects will also prevent adequate air flow.
Supply air
Figure 2. Return & Supply air collars
14” Duct Dimples
Return air
transition Duct Scre
ws
installing Return & Supply air collars
If the supply and return collars are supplied with the unit,
they will be located in the supply duct. They can be easily
positioned over the unit openings (
Figure 2
) and secured
with sheet metal screws.
• The diameter of the return duct collar is 14”.
• The diameter of the supply duct collar is 12”.
• Before permanently installing the collars, it is
recommended you pre-fit them over the openings first
to determine best fit and alignment.
Return Duct
1. Align the slots with the holes in the collar and install
two screws.
2. Position the collar over the opening and align the
four holes in the collar with the four dimples or holes
(depending on unit model) in the panel.
3. Using self-drilling screws (10-16x.5) attach the collar
to the rear panel.
Supply Duct
1. Position the supply duct collar so the edge of the unit
opening fits between the flange and the bead.
2. Overlap the collar ends keeping the small screw holes
underneath.
3. Align the holes in the crimped area and install one
screw.
notE:
It may be necessary to loosen the four
screws that hold the transition duct in order to install the
supply fitting. Re-tighten when installation is complete.
4. Tap collar (if necessary) to ensure engagement with
unit opening and install second screw.
5. Tighten first screw and rotate collar clockwise so joint
is near three o’clock position.
locating & installing the Return air assembly
To simplify installation, locate and install the return air
assembly first. If desired, the return opening can be
located inside a closet with louvered doors that has an
open area equal to or greater than a 12” x 20” grille. The
return air grille can be placed in the wall of a closet and
the air ducted into the filter box through a boxed-in area
at the closet floor level.
make sure the filter is readily
accessible.
