Step 13 - Make Electrical Connections; Field Power Supply; Units With Factory-Installed Non-Fused; Disconnect - Bryant Preferred Series Installation Instructions Manual

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. 30 — Condensate Drain Pan Piping Details
All units must have an external trap for condensate drainage.
Install a trap at least 4-in. (102 mm) deep and protect against
freeze-up. If drain line is installed downstream from the exter-
nal 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 ( 3 / -in.).
4
Step 13 — Make Electrical Connections
WARNING
Failure to follow this warning could result in personal inju-
ry or death.
Do not use gas piping as an electrical ground.
Unit cabinet must have an uninterrupted, unbroken electri-
cal 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 com-
partment, 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 pow-
er 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, con-
nect the source leads to the line side of the unit-mounted discon-
nect. (Check with local codes to ensure this method is acceptable
in your area.) If a de-energize via unit disconnect switch opera-
tion 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 compres-
sor contactor C and indoor fan contactor IFC pressure lugs with
unit field power leads. See Convenience Outlets on page 20 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. 31 and unit label diagram
for field power wiring connections.
3˝ (76 mm)
MIN
SEE NOTE
ROOF
CURB
DRAIN PLUG
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.
FIRE HAZARD
Failure to follow this warning could result in personal inju-
ry, death, or property damage.
Do not connect aluminum wire between disconnect switch
and unit. Use only copper wire.
Units Without Disconnect
Equip
C GR Lug
11 23

Disconnect

per
NEC
208/230-1-60 Ground
(GR)
Units With Disconnect
2
L1
L2 4
3 Phase Only
L3 6
Ground
(GR)
Disconnect factory test leads; discard.
Fig. 31 — Power Wiring Connections
ELECTRIC
DISCONNECT
SWITCH
Fig. 32 — Disconnect Switch and Unit
UNITS WITH FACTORY-INSTALLED
DISCONNECT
The factory-installed option non-fused disconnect (NFD)
switch is located in a weatherproof enclosure located under the
main control box. The manual switch handle and shaft are
shipped in the disconnect enclosure. Assemble the shaft and
handle to the switch at this point. Discard the factory test leads
(see Fig. 31).
Connect field power supply conductors to LINE side terminals
when the switch enclosure cover is removed to attach the handle.
19
WARNING
1-ph Belt Drive IFM
Direct Drive IFM
or
C IFC
Equip
11 13 13 23 TB GR Lug
Disconnect
per
NEC
L1 L2 L3 Ground
(GR)
208/230-3-60
460-3-60
575-3-60
1
Optional
Disconnect
3
3 Phase Only
Switch
5
Equip GR Lug
COPPER
WIRE ONLY
ALUMINUM
WIRE
NON-FUSED
Factory
Wiring