Nortek B64EM Series, Installation Instructions Manual

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NOTE 1: In all horizontal applications in which the unit is
installed above a finished ceiling and/or living space, a
secondary drain pan must be installed under the entire unit
to avoid damage to the ceiling in the event of condensate
overflow. Additionally, it is recommended that an approved
water level indicator or float switch device be used to shut
down the unit in the event water is detected in the auxiliary
drain pan.
NOTE 2: In horizontal right applications where the air
handler is in a humid location in an unconditioned space,
it is recomended to install a condensate shield kit over the
control board.
If suspending the air handler from the ceiling, assemble a
support frame ( Figure 4 ) using slotted iron channel and full
threaded rod. Fasten the frame together with nuts, washers,
and lockwashers. Secure the support frame to the rafters
with lag bolts. The air handler can also be suspended using
steel straps around each end of the unit. The straps should
be attached to the air handler with sheet metal screws and
to the rafters with bolts.
Horizontal Left Installations:
1. Remove the coil access door.
2. Remove the plug from one of the threaded holes in the
horizontal drain pan. Completely remove the webbing
located in the threaded holes of the horizontal drain pan.
IMPORTANT: If the webbing is not removed, the
condensate will not drain properly and ceiling damage
may occur.
3. Insert the plug (from horizontal drain pan) into the open
and unused drain hole in the drain pan at the bottom of
the unit to block bypass air.
4. Remove the corresponding drain line knockout from the
coil access door to allow access to the horizontal drain.
5. Replace the door and attach the drain line.
Horizontal Right Installations:
1. Remove the coil access door. Unscrew the line-set tube
close-off plate from the front left cabinet rail.
2. Slide the coil and drain pan assembly out of the unit.
3. Remove the sheet metal hairpin covers (if supplied) from
the back of the coil and discard.
4. Place the horizontal drain pan on the opposite side of the
coil. On units with 2 sets of knockouts, remove the other
set of knockouts in the coil spacing plates and insert
support rod.
5. Slide the coil and the horizontal drain pan assembly back
into the unit. Re-attach the tube close off plate.
NOTE: For A-size cabinet applications, it may be
preferrable to remove the blower assembly prior to
installing the coil & drainpan. In this case follow instructions
1-4 as listed above but also remove the blower access door
and blower assembly. The blower assembly is secured
with two screws on either side near the front. With these
removed the blower assembly can slide out of the front
of the unit. Install the coil and drain pan as described
in step 5 and then replace the blower assembly. Make
sure the flanges on the sides of the blower assembly are
captured by the pockets in the blower deck. It may be
necessary to lift the blower assembly during insertion to
allow the lower blower leg to clear the side of the drain
pan. The blower will stop against the back of the blower
deck. Replace the two screws and the blower access
door and procede with steps 6-9.
6. Remove the plug from one of the threaded holes in the
horizontal drain pan. Completely remove the webbing
located in the threaded holes of the drain pan.
Horizontal
Drain Pan
Return
Air
Figure 1. Upflow Installation
Tube
Close-off
Plate
Coil
Cabinet
Adaptor Kit
Figure 2. Downflow Installation
HORIZONTAL RIGHT
HORIZONTAL LEFT
RETURN
AIR
RETURN
AIR
Figure 3. Horizontal Configurations
Threaded
Rod
Lag
Bolt
Nuts (x2)
Washer
and
Lockwasher
Nuts (x2)
Figure 4. Unit Horizontally Suspended