Step 13 - Make Electrical Connections; Field Power Supply - Bryant Preferred Series Installation Instructions Manual

When using the standard side drain connection, ensure the red
plug in the alternate bottom connection is tight. Do this before
setting the unit in place. The red drain pan can be tightened with
a / -in. square socket drive extension.
1
2
To use the alternate bottom drain connection, remove the red
drain plug from the bottom connection (use a
socket drive extension) and install it in the side drain connection.
The piping for the condensate drain and external trap can be
completed after the unit is in place. See Fig. 25.
MINIMUM PITCH
1˝ (25 mm) PER
BASE RAIL
10´ (3 m) OF LINE
OPEN
VENT
TO ROOF
DRAIN
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. (102 mm) trap is recommended.
Fig. 25 — Condensate Drain Pan Piping Details
All units must have an external trap for condensate drainage. In-
stall a trap at least 4-in. (102 mm) deep and protect against
freeze-up. If drain line is installed downstream from the external
trap, pitch the line away from the unit at 1-in. per 10 ft (25 mm
per 3 m) of run. Do not use a pipe size smaller than the unit
connection ( / -in.).
3
4
Step 13 — Make Electrical Connections
WARNING
Failure to follow this warning could result in personal injury or
death.
Do not use gas piping as an electrical ground.
Unit cabinet must have an uninterrupted, unbroken electrical
ground to minimize the possibility of personal injury if an
electrical fault should occur. This ground may consist of
electrical wire connected to unit ground lug in control
compartment, or conduit approved for electrical ground when
installed in accordance with NEC (National Electrical Code);
ANSI/NFPA 70, latest edition (in Canada, Canadian Electrical
Code CSA [Canadian Standards Association] C22.1), and
local electrical codes.
NOTE: Field-supplied wiring shall conform with the limitations
of minimum 63°F (33°C) rise.

FIELD POWER SUPPLY

If equipped with optional powered convenience outlet, the power
source leads to the convenience outlet's transformer primary are
not factory connected. Installer must connect these leads
according to required operation of the convenience outlet. If an
always-energized convenience outlet operation is desired, connect
the source leads to the line side of the unit-mounted disconnect.
(Check with local codes to ensure this method is acceptable in
your area.) If a de-energize via unit disconnect switch operation of
the convenience outlet is desired, connect the source leads to the
load side of the unit disconnect. On a unit without a unit-mounted
disconnect, connect the source leads to compressor contactor C
and indoor fan contactor IFC pressure lugs with unit field power
/ -in. square
1
2
3˝ (76 mm)
MIN
SEE NOTE
ROOF
CURB
DRAIN PLUG
leads. See Convenience Outlets on page 19 for power transformer
connections.
The field power wires are connected to the unit at line-side
pressure lugs on compressor contactor C and indoor fan con-
tactor IFC (see wiring diagram label for control box compo-
nent arrangement) or at factory-installed option non-fused dis-
connect switch. Maximum wire size is #2ga AWG (copper on-
ly) per pole on contactors and #2ga AWG (copper only) per
pole on optional disconnect. See Fig. 26 and unit label diagram
for field power wiring connections.
NOTE: Unit may be equipped with short test leads (pigtails) on
the field line connection points on contactor C or optional discon-
nect switch. These leads are for factory-run test purposes only; re-
move and discard before connecting field power wires to unit con-
nection points. Make field power connections directly to line con-
nection pressure lugs only. See Fig. 27.
FIRE HAZARD
Failure to follow this warning could result in personal injury,
death, or property damage.
Do not connect aluminum wire between disconnect switch and
unit. Use only copper wire.
Units Without Non-Fused Disconnect
TB
11 12
Disconnect
per
NEC
208/230-1-60
Units With Non-Fused Disconnect
L1 2
L2 4
3 Phase Only
L3 6
Ground
(GR)
Disconnect factory test leads; discard.
Fig. 26 — Power Wiring Connections
ELECTRIC
DISCONNECT
SWITCH
Fig. 27 — Disconnect Switch and Unit
17
WARNING
Equip
GR Lug TB
11 12 13
Disconnect
per
NEC
Ground L1 L2 L3
(GR)
208/230-3-60
460-3-60
575-3-60
1
Optional
Disconnect
3
Switch 3 Phase Only
5
Equip GR Lug
COPPER
WIRE ONLY
ALUMINUM
WIRE
Factory
Wiring