3
PROPELLER UPBLAST IO&M
B51071-005
table. When the pulleys are not the same
width, the allowable gap must be adjusted
by half of the difference in width.
Figure
3
illustrates using a carpenter’s square to
adjust the position of the motor pulley until
the belt is parallel to the longer leg of the
square.
Wiring Installation
All wiring should be in accordance with
local ordinances and the National Elec-
trical Code, NFPA 70. Ensure the power supply (voltage,
frequency, and current carrying capacity of wires) is in ac
-
cordance with the motor nameplate. Refer to the
Wiring Dia-
grams
, on page 3.
Lock off all power sources before unit is wired to power
source.
Leave enough slack in the wiring to allow for motor move-
ment when adjusting belt tension. Some fractional motors
have to be removed in order to make the connection with the
terminal box at the end of the motor.
Wiring Diagrams
Single Speed, Single Phase Motor
T-1
T-4
Ground B
L 2
L1
Ground A
Line
When ground is required, attach to ground A or B with No. 6 thread
forming screw. To reverse, interchange T-1 and T-4.
2 Speed, 2 Winding, Single Phase Motor
Ground A
Ground B
T-1
T-4
Low Speed
High Speed
L1
L2
Line
When ground is required, attach to ground A or B with No. 6 thread
forming screw. To reverse, interchange T-1 and T-4 leads.
Single Speed, Single Phase, Dual Voltage
Ground B
J-10
T-5
Ground A
Link A
Link B
Low Voltage
Line
L 2
L 1
Ground A
Link A
and B
L1
L2
Line
Ground B
T-5
J-10
When ground is required, attach to ground A or B with No. 6 thread
forming screw. To reverse, interchange T-5 and J-10 leads.
3-Phase, 9 Lead Motor
4 5 6
1
7
2
8
3
9
L1 L2 L3
4 5 6
7 8 9
1 2 3
L1 L2 L3
Low Voltage
208/230 Volts
High Voltage
460 Volts
3 Phase, 9 Lead Motor
Y-Connection
7
1
6
7 8 9
4 5 6
1 2 3
Low Voltage
208/230 Volts
High Voltage
460 Volts
8
2
4
9
3
5
L1
L3
L2
L1
L3
L2
3 Phase, 9 Lead Motor
Delta-Connection
To reverse, interchange any two line leads.
2 Speed, 1 Winding, 3-Phase Motor
Motor
1
2
3
4
5
6
Together
High Speed
Line
L1
L 2
L 3
1
2
3
4
5
6
Open
Low Speed
Line
L1
L 2
L 3
Motor
To reverse, interchange any two line leads. Motors require magnetic
control.
2 Speed, 2 Winding, 3-Phase
L
1
T
1
T
2
T
3
Low Speed
Low Speed
Low Speed
High Speed
High Speed
High Speed
Motor
T
13
T
12
T
11
L
2
Line
L
3
To reverse,
High Speed: interchange leads T11 and T12; Low
Speed: interchange leads T1 and T2; Both Speeds: interchange any
two line leads.
Typical Damper Motor Schematic
Fan
Motor
Damper
Motor*
Second
Damper
Motor
Transformer**
Transformer**
L3
L2
L1
For 3-Phase, damper motor voltage should be the same between L
1
and L
2
. For single phase application, disregard L
3
.
*Damper motors may be available in 115, 230 and 460 volt mod
-
els. The damper motor nameplate voltage should be verified prior to
connection.
**A transformer may be provided in some installations to correct the
damper motor voltage to the specified voltage.
Follow the wiring diagram in the disconnect switch and
the wiring diagram provided with the motor.
Correctly la-
bel the circuit on the main power box and always identify a
closed switch to promote safety (i.e., red tape over a closed
switch).
