Nortek R8GE Series, Installation Instructions Manual

Page: 9 / 28

9
UNIT INSTALLATION
Packaging Removal
Remove the shipping carton and User’s Manual from the
equipment. Take care not to damage the tubing connections
when removing the carton. For rooftop installations, remove
and discard the two supports attached beneath the unit.
Rigging & Hoisting
WARNING:
To avoid the risk of property damage, personal injury,
or death, it is the rigger’s responsibility to ensure
that whatever means are used to hoist the unit are
safe and adequate:
• The lifting equipment must be adequate for the
load. Refer to
Table 9 (page 21)
for unit weights.
• The unit must be lifted from the holes in the base
rails using cables or chains.
• Spreader bars are required to protect the unit and
ensure even loading.
• Keep the unit in an upright position at all times. The
rigging must be located outside the units center
of gravity. Refer to
Figure 9 (page 21)
for locating
the center of gravity.
• All panels must be securely in place during rigging
and hoisting.
Clearances to Combustible Materials
R8GE units are certified as combination heating and cooling
equipment for outdoor rooftop or ground level installations.
Units may be installed on combustible flooring or Class A,
B, or C roofing material when used with bottom supply and
return air ducts as long as the following requirements are met:
• If using horizontal supply and return air ducts, the horizontal
roof curb kit and return air kit must be installed prior to unit
installation. Horizontal roof curb is required.
• If using bottom discharge with return air ducts a roof curb
must be installed prior to unit installation. See Rigging and
Hoisting section for setting of the unit.
• Sufficient clearance for unobstructed airflow through the
outdoor coil must also be maintained in order to achieve
rated performance. See page 5 for information about
locating the equipment.
Ground Level
Ground level installations must be located according to local
building codes or ordinances and these requirements:
• Clearances must be in accordance with those shown in
Figure 3 (page 10) .
• A suitable mounting pad ( Figure 3 ) must be provided and
be separate from the building foundation. The pad must
be level to ensure proper condensate disposal and strong
enough to support the unit’s weight. The slab height must
be a minimum of 2” (5cm) above grade and with adequate
drainage.
• Units require horizontal roof curb and return air kit for
horizontal installations.
• Ductwork should be attached directly to flanges on panels
supplied in horizontal duct conversion kits.
Rooftop
Rooftop installations must be located according to local building
codes or ordinances and these requirements:
• The roof must be capable of handling the weight of the unit.
For unit weights, see Table 9 (page 21) . Reinforce the
roof if necessary.
• The appropriate accessory roof curb must be installed prior
to unit installation. The roof curb must be square and level
to ensure proper condensate drainage. See Figure 4 (page
10) . Please follow all instructions provided with the
kit.
• Secure roof curb or frame to roof using acceptable
mechanical methods per local codes.
NOTE:
Make sure the
two supports beneath the unit have been removed.
Condensate Drain
Condensate is removed from the unit through the 3/4” female
pipe fitting located on the front side of the unit. See Figure 5
(page 10) . Install a 2 inch condensate trap in the drain line of
the same size and prime with water. When connecting rigid drain
line, hold the female fitting with a wrench to prevent twisting.
Do not over tighten! Refer to local codes and restrictions
for proper condensate disposal requirements.
Horizontal to Downflow Conversion
The unit is shipped ready for horizontal duct connections.
If down flow ducts are required, the unit must be converted
following the steps below for both the supply and return ducts.
1. Remove the horizontal duct cap.
2. Locate the duct cap inside the duct openings and remove
the screw holding it in place.
3. Lift the cap out of the unit. ( Hint: The cap can be pushed
up from the bottom by reaching through the fork slot).
4. Cover the horizontal duct opening with the horizontal duct
cap. The insulation will be on the indoor side.
5. Fasten the cover with screws to seal.
Removal of Internal Filter Rack
(3 Phase Only)
1. Remove the return air panel from the unit.
2. Remove the height adjustment screw from the inside of the
rack.
3. Remove (1) screw securing the assembly to the coil located
on the left leg of the rack. NOTE: The assembly can now
be easily collapsed and removed from the unit. See Figure
6 (page 10) for filter rack securing screw locations.
Installing Filters in the Filter Rack (3 Phase Only)
1. Remove access panel screws from return air panel.
( HINT : Loosen the unit’s top panel screws near the top edge
of the access panel. The access panel was designed to be
captured underneath the top panel.)
2. Slide the first filter between both guide channels of filter
rack and allow the filter to drop easily into place.
3. Verify the bottom of the filter is within the channels of the
rack.
4. Slide the 2nd filter between both guide channels of filter
rack.
5. Verify the bottom of the filter is within the channels of the
rack.
6. Replace access cover by sliding the top edge of panel
under the lip of the unit’s top panel. Secure access panel
by replacing the screws.