Krendl 500, Руководство пользователя, Страница: 22 / 59

Rev. Date: 3/14/18 Page 19
MODEL #500
(illustration R)
CARBON BRUSH REPLACEMENT for 12.5 Amp (6 AMP 230 volt) 3-STAGE BLOWER: (See illustration S) 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 previous page)
2.Remove screw and shield from blower. (See illustration S)
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.
12.5 Amp (6 Amp 230 volt)
3-Stage Blower Motor
(Brush Replacement)
CARBON BRUSH REPLACEMENT 8 AMP (4 AMP 230 volt) 2-STAGE BLOWER: (See illustration R) 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 previous page)
2. To replace brush assembly; use a flat blade screwdriver to carefully release housing latch located at base of brush
assembly. (See illustration R-1)
3. Remove brush holder clamp using a Phillips head screwdriver. (See illustration R-2)
4.
Lightly tap brush holder at the front/center portion of the unit to release barb on spade of wire connector. (See illustration
R-3)
5. Pry spade connector from brush assembly housing and replace brush. (See illustration R-4) If spade connector does not
remove easily, repeat step 3. On reassembly and handling, the lead wires must be kept away from rotating parts and motor
frame.
6. 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.
7.Reinstall Blower into Blower Box and wire Blower into Main Control Panel.
General Maintenance (cont.)
(R-1) (R-2) (R-3) (R-4)
8 Amp (4 Amp 230 volt)
2-Stage Blower Motor
(Brush Replacement)
(illustration S)