5
Figure 4 - Attic Installation
Figure 5 - Hanging Installation
Figure 6 - MBVC Motor Orientation
Support
4. Attach return and supply ductwork. Seal connections.
5. Make electrical connections as specified in
Electrical
Connections
section of this manual.
Support
Counterflow and Horizontal Applications
Loosen motor mount and rotate motor (See Figure 6). Be sure mo
-
tor is oriented with the female connections on the casing pointing
down. If the motor is not oriented with the connections pointing
down, water could collect in the motor and cause premature failure.
NOTE:
After rotating motor, tighten motor mount to secure motor.
Be sure that the gap between the motor and the insulation is the
same as it was before loosening the motor mount. This will ensure
that the blower wheel is properly spaced inside the blower housing.
FEMALE CONNECTIONS
SIDE VIEW
W
AR
NI
NG
S
O
F
TW
A
R
E V
E
R
.
TO
P
FRONT VIEW
Electrical Connections
Consult the local power company and local codes before installing
this unit. All wiring must be in accordance with the National Elec
-
trical Code as well as all local codes. Knockouts have been provided
on side and top of the cabinet for the installation of the electrical
conduit. If the knockouts on the cabinet sides are used for electrical
conduit, an adapter ring must be used in order to meet UL1995
safety requirements. Use Minimum Circuit Ampacity and type of
wire to determine proper wire size. The unit MUST be properly
grounded. A ground lug is provided in the unit.
Check all factory connections before connecting electrical power
to unit to ensure none were loosened or disconnected during
shipping and handling.
208/230 Volt Line Connections
If heater kits will not be installed, remove the proper size knockout
for the electrical conduit connection. Connect electrical conduit to
the unit using two washers to make an approved connection. If the
high voltage knockout is removed, please use the provided foam
tape to seal the opening with the conduit.
The power supply wires must be connected to the red and black
power wiring. Two wire nuts are provided in the bag assembly for
this connection. Wrap the wire nuts with electrical tape. (Insulat
-
ed crimp type connectors, field supplied, may be substituted for
the wire nuts and electrical tape provided proper size connectors
are used.) A ground wire MUST be connected to the ground lug
inside the unit.
Low Voltage Wiring
A 24V-control voltage connects the air handler to the room thermo
-
stat and condenser and must use low voltage wiring with copper
conductors. A minimum 18 AWG wire must be used for installations
up to 150 feet. Low voltage wiring must be connected through
the top of the cabinet or either side. If the low voltage opening is
being used, please replace the pre-installed cap with the bushing
provided in the literature kit.
HIGH VOLTAGE!
T
O
PREVENT
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DISCONNECT
THE
ELECTRICAL
POWER
BEFORE
ELECTRICALLY
CONNECTING
THE
UNIT
.
WARNING
T
O
AVOID
THE
RISK
OF
FIRE
OR
EQUIPMENT
DAMAGE
,
USE
COPPER
CONDUCTORS
.
WARNING
T
O
AVOID
THE
RISK
OF
PERSONAL
INJURY
,
WIRING
TO
THE
UNIT
MUST
BE
PROPERLY
POLARIZED
AND
GROUNDED
.
CAUTION
A
LL
WIRING
MUST
COMPLY
WITH
APPLICABLE
LOCAL
AND
NATIONAL
CODES
. T
YPE
AND
LOCATION
OF
FUSED
DISCONNECT
SWITCH
(
ES
)
MUST
COMPLY
WITH
ALL
APPLICABLE
CODES
AND
PROVIDE
OVERCURRENT
PROTECTION
AS
SHOWN
ON
THE
NAMEPLATE
.
WARNING
