Bryant MA1A Installation And Start-Up Instructions Manual Download Page 6

Page: 6 / 16

CAUTION:

Failure to properly seal flashing to roof will

result in rainwater leaking into and damaging unit or
home. Proper sealing of roof vent is the responsibility of
installer.

3. Check fit where flexible duct passes through ceiling. Seal

any openings with foil-type duct tape or caulking to prevent
loss of conditioned air to attic or attic air leaking into home.
(See Fig. 14.)

4. Remove protective cover from top of unit and inspect fan

housing to make sure no debris is in fan housing.

5. Push insulation up on lower end of flexible duct. Slip

flexible duct onto round adapter duct on top of unit and
secure duct to outdoor-air exhaust with mastic or U.L. 181
tape.

NOTE:

An untaped or poorly taped joint will leak outside air into

home. All excess flex duct must be cut off and remaining duct
pulled tight.

6. Pull insulation down over taped joint and outdoor-air

exhaust. (See Fig. 15.) Fasten insulation in place with tape
and strap.

VI.

MAKE ELECTRICAL CONNECTIONS

Electrical Requirements

WARNING:

To prevent personal injury or equipment

damage, always disconnect main power before doing any
maintenance or wiring. A failure to follow this warning
could result in electrical shock, fire, or death.

NOTE:

All electrical power supply conductors serving unit must

be copper.

The circuit breakers or fuses used for branch circuit protection
should be UL Recognized. If circuit breakers are used, the circuit
breaker for compressor circuit must have a UL HACR rating. If
fuses are used, the fuses for compressor circuit MUST be a time
delay.

All electrical wiring supplying unit must comply with the NEC
ANSI/NFPA 70, and all state and local codes.

Depending on auxiliary heater size, unit must be supplied with 1,
2, or 3 separate 240-v circuits from home’s circuit breaker panel or
fuse box. Refer to Table 3 and Table 4 for required circuits and
recommended wire size for each circuit.

The unit is equipped with circuit breakers enclosed in wiring
compartment. This compartment is located in top right-hand corner
of unit.

Ground wires for supply circuits must be attached to ground lug(s)
in circuit breaker box to provide required safety grounding of unit.

WARNING:

The cabinet must have an uninterrupted or

unbroken ground according to National Electrical Code,
ANSI/NFPA 70 or local codes to minimize personal
injury if an electrical fault should occur. This may consist
of electrical wire or conduit approved for electrical
ground when installed in accordance with existing elec-
trical codes. A failure to follow this warning could result
in an electrical shock, fire, or death.

WARNING:

Failure to adhere to minimum wire sizes,

maximum

over-current

protection,

disconnect,

and

grounding requirements can cause personal injury, elec-
trical shock, or a fire hazard. All wiring MUST comply
with requirements of the NEC, state, and local codes.

All low-voltage thermostat wires MUST be connected to low-
voltage terminal block mounted on left side of control box located
inside front panel of unit.

CAUTION:

Power supply must be nominal 230-v, 1

phase. Do not exceed 253v or go below 197v.

Electrical Connections

WARNING:

To avoid personal injury or death, do not

supply power to unit with compressor terminal box cover
removed.

1. Remove front panel.

a. Remove 2 screws on bottom.

b. Remove 5 screws holding cover around breakers and

remove it to gain access to wiring compartment. (See
Fig. 16.)

Fig. 14—Roof Cap Installation