Supply Fan (Blower) Section; Supply Fan (Direct-Drive) - Bryant 547K 04-07 Series Service And Maintenance Instructions

17-1/4"
Divider
Cleanable
Aluminum
Filter
Barometric
Relief
Fig. 3 — Filter Installation
To remove the filter, open the filter clips. Re-install the filter by
placing the frame in its track, then closing the filter clips.
MANUAL OUTSIDE AIR HOOD SCREEN
This inlet screen is secured by a retainer angle across the top
edge of the hood. (See Fig. 4.)
To remove the screen, loosen the screws in the top retainer and
slip the retainer up until the filter can be removed. Re-install by
placing the frame in its track, rotating the retainer back down,
and tightening all screws.
Screws
Fig. 4 — Screens Installed on Outdoor-Air Hood
Outside
Air
Hood
Filter
Filter
Clip
4

SUPPLY FAN (BLOWER) SECTION

WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Before performing service or maintenance operations on
unit, LOCKOUT/TAGOUT the main power switch to unit.
Electrical shock and rotating equipment could cause severe
injury.
All low-voltage wiring should be routed through the provided
raceway built into the corner post of the unit or secured to the
unit control box with the electrical conduit in order to provide
UL-required clearance between high and low-voltage wiring.

Supply Fan (Direct-Drive)

All 547K units have the Axion™ direct drive vane axial fan
system. The fan is driven by an ECM motor with speed that is
user set through the Unit Control Board (UCB). Speeds are ful-
ly configurable from 40% to 100% of the motor's maximum
speed. See Fig. 5 and 6.
Motor
Plug
Fan
Rotor
ECM
Motor
Fig. 5 — Direct-Drive Supply Fan Assembly
BLUE
YELLOW
3 2 1
BLACK
6 5 4
GRN/YEL
9 8 7
WHITE
ORANGE
GRAY
Fig. 6 — ECM Motor Plug Connectors
Power L3 (3 phase only)
Power L2
Power L1
Earth Ground
CTL Signal Common
10 vdc Source
0–10 vdc Signal