3
SRSH IO&M
B51142-004
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 & 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.
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 mo
-
tors may be available in 115, 230 and 460 volt models. The damp-
er 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.
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 T
11
and T
12
.
Low Speed - interchange leads T
1
and T
2
.
Both Speeds - interchange any two line leads.
Maintenance
Establish a schedule for inspecting all parts of the fan. The
frequency of inspection depends on the operating conditions
and location of the fan.
Inspect fans exhausting corrosive or contaminated air within
the first month of operation. Fans exhausting contaminated air
(airborne abrasives) should be inspected every three months.
Regular inspections are recommended for fans exhausting
non-contaminated air.
It is recommended the following inspections be conduct-
ed twice per year:
• Inspect bolts and setscrews for tightness. Tighten as
necessary. Refer to
Torque chart
• Inspect belt wear and alignment. Replace worn belts with
new belts and adjust alignment as needed. Refer to
Belt and
Pulley Installation
, page 5
• Bearings should be inspected as recommended in the
Conditions Chart
, page 4
• Inspect for cleanliness. Clean exterior surfaces only.
Removing dust and grease on motor housing assures
proper motor cooling
Fan Bearings
The fan bearings are provided prelubricated. Any special
-
ized lubrication instructions on fan labels supersedes informa
-
tion provided herein. Bearing grease is a petroleum lubricant
in a lithium base conforming to an NLGI #2 consistency. If
user desires to utilize another type of lubricant, they take re
-
sponsibility for flushing bearings and lines, and maintaining a
lubricant that is compatible with the installation.
