User Guide

3
fantech
Dimensions
All dimensions in inches
Model Propeller Dia A B C D
2GMS 1021 10 8
3
/
4
11 5
9
/
16
1
/
4
2GMS 1221 12 10
3
/
16
13 5
15
/
16
1
/
4
2GMS 1661 16 12
15
/
16
17
3
/
8
6
1
/
2
1
/
4
2GMS 20B1 20 16
3
/
4
22
1
/
8
11
15
/
16
5
/
16
A Sq.
D
C
B
A Sq.
D
C
B
3
4
2
5
6
8
7
1
Repair Part List
Ref. # Description Qty Ref. # Description Qty
1 Motor 1 5 Yoke brace (2GMS20B1 only) 1
2 Guard 1 6 3/8-24 X 1” Screw* 1
3 Propeller 1 7 3/8-24 Locknut* 1
4 #8-32 Spinlock nut* 4 8 #10 Flatwasher* 4
(*) Standard hardware items, available locally.
Troubleshooting
Symptom Possible Cause(s) Corrective Action
Insufcient air ow 1. Restricted air intake 1. Provide larger opening for intake air
2. Restricted exhaust opening 2. Remove restriction
3. Low voltage 3. Determine cause and correct
4. Excessive dirt on guard and propeller 4. Clean
Excessive noise while operating 1. Loose mounting screws 1. Tighten securely
2. Loose propeller on motor shaft 2. Tighten setscrew
3. Noisy motor bearing 3. Lubricate or replace motor
4. Unbalanced fan blade 4. Replace
PART REPLACEMENT
1. Do not repair damaged
propeller. They should
be replaced with a
properly balanced
replacement.
2. Remove the four
screws holding the
guard to the venturi
panel. Remove the
guard, yoke, motor,
and propeller.
3. Loosen and remove bolt
and nut holding wire
brace to motor yoke
tabs.
6. Reassemble the unit in reverse order
of disassembly.
4. Loosen the setscrews in blade hub and
remove the propeller.
5. Loosen the nuts holding motor on
guard and remove.