Rev. Date: 12/27/17 Page 20
MODEL #1300/2300
General Maintenance (cont.)
CARBON BRUSH REPLACEMENT for 12.5 AMP (6 AMP 230 volt) 3-STAGE BLOWER: (See Illustration Q)
Order replacement brushes from your supplier to assure proper brush style. Carbon brushes need to be
replaced when excessive arcing is produced on the commutator. This would be evident by an intermittent
scratchy sound with loss of blower r.p.m. Replace brushes before brush shunt touches the commutator.
1. Remove Blower from Blower Box. (See Blower Replacement on page 19)
2. Remove screw and shield from blower. (See Illustration Q)
3. Unhook wire connected to Brush Assembly.
4. Remove Brush Cover screws by inserting screwdriver through hole in blower housing and turning screw.
5. Pull out old Brush Assembly and install new Brush Assembly and Brush Cover.
6. Connect wire to Brush Assembly and reassemble blower shield. On reassembly and handling, the lead
wires must be kept away from rotating parts and motor frame.
7. To achieve best performance, the new brushes should be seated on the commutator before full voltage is
applied. To seat brushes, run variable speed blower control on medium speed for thirty minutes after brush
change. The motor will return to full performance after an additional thirty to forty-five minutes running
period at full voltage (BLOWER CONTROL on high). Application of full voltage directly after changing
brushes will cause arcing, commutator pitting, and reduced overall life. Brushes can normally be changed
two times before armature and other component replacement is required.
8. Reinstall Blower into Blower Box and wire Blower to Main Control Panel.
(Illustration Q)
12.5 AMP (6 Amp 230 volt)
3-Stage Blower Motor
(Brush Replacement)
Note: The 14.5 AMP 2-Stage blower motor does not have
carbon brush replacement due to the extended brush life.
To Next Page
Loading...