OPERATION
Fans are designed to operate with simple on/off switches, or can be wired into sophisticated controls. Some fan models
are designed to run at variable speed while others are single speed only. Varying a single speed fan will cause the motor
to fail.
Fan labels should indicate whether or not fan is variable speed. If unsure contact a Canarm representative with the fan
model number at our head office.
WARNING: Variable speed fans should have the minimum speed set to open the fan louvers a minimum of 1"
to ensure proper motor cooling and prevent premature motor failure.
These fans are used in a variety of applications and therefore maintenance schedules will vary. In general no more than
1/16" of dirt build-up should occur on blade, motor, guard, and louvers for proper fan operation and to prevent premature
failure. The complete fan should be washed down on a regular basis to maintain the high efficiency of the fan. Particular
care should be taken to clean louvers, fan blades front and back, and front guards for better air moving performance. The
motor should be kept clean to prevent overheating and premature failure. As with all mechanical equipment scheduled
inspections should include checking that all hardware is secure and blade set screws are tight. We suggest as a minimum,
that this be done after every grow out, in livestock applications.
Chart #2
Note:
• NEC Article 310-5 - * Minimum conductor size for general wiring at 115-440VAC is number 14AWG.
• Above wire sizes based on approximate 5% voltage drop during starting; copper conductors; and 75C type THHW, THW, THWN, RH, RHW
insulation etc. For aluminum wire, increase two wire size steps minimum. See NEC Article 310 for ampacities af aluminum conductors.
• Type S, SO, SJ, SJO, etc flexible cable wire sizes. See NEC Article 400 for ampacity.
Table A - Minimum Wire Sizes for Three-Phase Motors
Motor
25 to 50 Feet
100 Feet
150 to 200 Feet
HP
200V
230V
460V
200V
230V
460V
200V
230V
460V
1/8
14(18)* 14(18)*
14(18)*
14(18)*
14(18)*
14(18)*
14(16)*
14(16)*
14(18)*
1/6
14(18)* 14(18)*
14(18)*
14(18)*
14(18)*
14(18)*
14
14(16)*
14(18)*
1/4
14(18)* 14(18)*
14(18)*
14(16)*
14(18)*
14(18)*
14
14
14(18)*
1/3
14(18)* 14(18)*
14(18)*
14(16)*
14(16)*
14(18)*
12
14
14(18)*
1/2
14(16)* 14(18)*
14(18)*
12
14(16)*
14(18)*
10
12
14(18)*
3/4
14(16)* 14(16)*
14(18)*
12
14
14(18)*
10
10
14(16)*
1
14
14(16)*
14(18)*
12
12
14(18)*
8
10
14(16)*
1-1/2
12
14
14(18)*
10
10
14(16)*
6
8
14
2
12
12
14(18)*
8
10
14(16)*
6
6
12
3
10
12
14(18)*
6
8
14
4
6
12
Table B - Minimum Wire Sizes for Single-Phase Motors
Motor
25 to 50 Feet
100 Feet
150 to 200 Feet
HP
200V
230V
460V
200V
230V
460V
200V
230V
460V
1/8
14(18)* 14(18)*
14
14(18)*
12
14(18)*
10
8
14
1/6
14(16)* 14(18)*
12
14(18)*
10
14(16)*
6
6
12
1/4
14
14(18)*
10
14(16)*
8
14
6
4
10
1/3
14
14(18)*
10
14(16)*
8
14
6
4
10
1/2
12
14(18)*
8
14
6
12
4
3
8
3/4
10
14(16)*
6
12
4
10
2
1
6
1
10
14(16)*
6
12
4
10
2
1
6
1-1/2
8
14
6
12
3
8
1
1/0
6
2
8
14
4
10
2
8
1/0
2/0
4
3
6
12
3
8
1/0
6
2/0
4/0
3
WARNING:
Motors are equipped with automatic overload protection and may restart without warning.
Always disconnect power before attempting to service.
WARNING
Moving parts,
disconnect power
before servicing.
!
MAINTENANCE
M0017 - Rev. 5 - Rev Date: 22/04/03
Page 4 of 5
