Krendl 309 User manual

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OWNER’S MANUAL FOR #309 BLOWER
READ ALL INSTRUCTIONS BEFORE USING BLOWER
IMPORTANT: Unpack blower immediately and check for damage to shipping. Place any damage claim
with delivering carrier, saving all packing materials for inspection. Our warranty covers manufacturer’s
defects only. DO NOT return to shipper.
File instructions for future reference and ordering replacement parts.
A WORD ABOUT YOUR BLOWER. This blower is designed to blow CELLULOSE insulation fibers,
properly conditioned by agitation in the hopper. This unit is not designed to blow fiberglass, mineral wool,
or similar abrasive material, which would cause damage to fan and chamber. Consult the manufacturer for
a wide range of machines designed to handle all fibers.
Declaration of Incorporation -The 309 blower’s intended use is with cellulose machines and is an integral
part of the machine’s operation. The blower is not intended to be used as a separate piece of equipment as
this would create an unsatisfactory condition. The assembler performing final assembly of blower unit
must ensure proper installation to make certain that final health and safety requirements have been met.
Your blower is designed with an abrasive resistant fan and chamber, powered by a high speed, universal,
brush-type motor.
#309
16.8 amp Motor, 120V
(8.4 amp, 230V)
1.5 h.p. Motor
No load RPM 16,500
2016 Watts
CHAMBER FAN DIAMETER PRODUCTION AMPS
SMALL 9” 6 ½” 800 lbs/hr 12 | Chamber Outlet: 2” or 2 ½”
MEDIUM 10” 7 ½” 1000 lbs/hr 15 | Blower Intake: 2-3/8”
| Fan bore: 9/16”
LIMITED WARRANTY
This model carries a one (1) year warranty against defects in material and workmanship from date of
invoice to the original purchaser. If blower needs service during that time, call your supplier immediately.
Do not attempt to service blower as this would void warranty.
This warranty does not cover ordinary wear, which occurs during normal use of the machine. Materials
such as fiberglass and mineral wool, etc. because of their abrasiveness, are not recommended for use with
this blower.
This warranty does not cover damage to unit caused by heat (i.e armature, field coil). In most cases, heat
damage is a result of improper use. See operating instructions.
The warranty also excludes switches and cords – the use or abuse of which cannot be controlled.
The warranty also excludes damage or breakage due to carelessness, accidents, or improper use.
We do not assume responsibility for repairs made or attempted by unauthorized persons. Returns, in-
warranty, must be sent to our factory for examination and determination of the defect.
All blowers or parts must be returned prepaid with necessary information as to date of
purchase, model, and serial number with description of the problem and defect.

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WARRANTY EXTENDED ONLY TO ORIGINAL PURCHASER
WARRANTY AND RETURNED GOODS PROCEDURES:
When returning blower to the manufacturer for repair, first obtain a return goods authorization number
(RGA#), and you will be given shipping instructions. All blowers or parts must be returned prepaid with
necessary information as to date of purchase, model, and serial number with description of the problem and
defect. The blower must be shipped PREPAID to:
Krendl Machine Co.
1201 Spencerville Ave.
Delphos, OH 45833 USA
Phone: [phone]
Fax: [phone]
www.krendlmachine.com
[e-mail]
IF BLOWER WAS NOT PURCHASED DIRECTLY FROM KRENDL MACHINE CO., CONTACT
YOUR SUPPLIER.
Once blower is received, it will be inspected. In-warranty blowers will be repaired and returned
immediately. Estimates of repair and charges will be provided for out-of-warranty units.
CAUTION/SAFETY: FAILURE TO OBSERVE WARNINGS
BELOW MAY RESULT IN DANGER TO OPERATOR.
• Never operate blower unless properly and securely mounted to machine. Strong suction can pull
fingers or clothing into dangerous blades. Blower connects to insulation machine by a twist-lock
adapter, 2-3/8”.
• Ground properly with a three-wire cord in a grounded electrical outlet.
• Keep away from moisture.
• Do not operate when flammable and/or explosive vapors or dust are present.
• Disconnect cord from electrical outlet before attempting any electrical or mechanical service.
• Authorized personnel must perform electrical service.
OPERATING INSTRUCTIONS: READ ALL INSTRUCTIONS
BEFORE YOU BEGIN.
A. This blower is an integral part of a cellulose blowing system. Connect blower to the insulation
machine using the twist-lock adapter provided on the base of the machine. In many cases, the
blower electrical connection will be through a remote control unit. Plug blower into receptacle
marked “blower outlet”. The blower will have an on-off switch, governed by the remote control
unit; it cannot control blower unless blower switch is in “on” position.
B. Connect insulation hose directly to the blower outlet with appropriate size hose and hose clamp.

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C. Make sure you have adequate electrical supply. LOW VOLTAGE WILL CAUSE BLOWER TO
OVERHEAT AND DAMAGE MOTOR. THIS VOIDS WARRANTY.
D. Keep insulation material from obstructing the cooling of motor.
E. Use only DRY cellulose. Wet or damp material causes binding inside blower chamber and WILL
OVERHEAT AND DAMAGE MOTOR. THIS VOIDS WARRANTY.
F. If insulation hose or blower is clogged, turn blower off immediately, as continued operation WILL
CAUSE BLOWER TO OVERHEAT AND DAMAGE MOTOR. THIS VOIDS WARRANTY.
MAINTENANCE.
THIS BLOWER IS BACKED BY A ONE (1) YEAR WARRANTY AGAINST MANUFACTURER’S
DEFECTS. If blower needs service during that time, call your supplier immediately. Do not attempt to
service blower, as this would void warranty.
The manufacturer recommends that all repairs be made at its own factory authorized service center. Blower
repair done by the manufacturer is warranted for 90 days on repair parts and workmanship.
If you choose to have repairs made elsewhere, replacement parts are offered that have been carefully
inspected to insure they meet the specifications of the original part. Any disassembly and reassembly of
the unit to replace the defective part must be done with care to insure proper fit and alignment. No
warranty consideration will be extended on parts incorrectly installed or mishandled. All units should be
run for approximately 15 minutes, prior to assembly of fan and chamber, to insure proper brush seating and
alignment. All questions regarding replacement of parts should be directed back to the factory.
REGULAR BLOWER MAINTENANCE WILL EXTEND LIFE
OF THE BLOWER.
A. Always disconnect electrical power before making inspection or repairs. Quarterly inspection of
the felt washers located under endplate is necessary to check for wear. Failure to do so will result
in bearing failure. Daily blow out exhaust cooling fan and air intake fan on motor housing with
compressed air to ensure bearing armature life.
B. Keep blower clean. Check for accumulation of materials or debris on fan blades. Make sure all
material is blown out of blower at end of workday. Weekly inspect the intake fan for bent or worn
blades.
C. Keep motor clear of material for proper flow of cooling air.
D. Replace carbon brushes when worn to ½” in length. Loosen brush plug (item #20), and remove
the carbon brush (item #21). There are two carbon brushes on motor. Replace by inserting new
brush in same direction. Attach brush plug. Use only Krendl carbon brushes. These brushes are
manufactured specifically for this motor. Do not use substitute brushes as serious damage to the
motor can be caused and VOID WARRANTY.

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TROUBLESHOOTING.
IMPORTANT: If there is excessive noise, vibration, arcing of brushes, or other symptoms of trouble,
STOP BLOWER IMMEDIATELY AND UNPLUG. Contact your supplier or qualified motor repair
service before making inspection or repairs.
SYMPTOM CAUSE SOLUTION
Blower does not run. Blower switch in “off” Turn to “on” position.
Position.
Remote control malfunctioning. Refer to insulation machine
instructions. Connect directly
to power cord.
Blower unplugged. Check all power connections.
Debris accumulated on brush Check to see if carbon brush
assembly. is making contact with the
commutator. Blow out area
and keep clean.
Blower overheating/high Low voltage. Check length and gauge of
amperage. extension cord.
Material build-up. Clean excessive material from
fan chamber by scraping and
blowing out area.
Remove material from around
motor.
Bearing failure. Contact your supplier or
qualified motor repair service.
Wet or damp material. Replace with dry.
Excessive arcing. Worn, sticking, improperly Replace brushes.
seated or damaged brushes.

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Excessive vibration. Fan imbalance. Clean material build-up.
Inspect fan for broken blades.
Bearing failure. Contact your supplier or
qualified motor repair service.

DUMORE
PARTNO.
426-0285
589-0495
643-1105
R-686-0213
408-0805
408-0805
527-0042
548-0747
548-0553
414-0044
734-0086
599-0331
822-1213
746-0098
R-645-0014
R-769-0010
868-0509
R-769-0003
510-0056
517-0257
751-0139
R-456-0115
R-457-0827
451-0082
R-769-0011
819-3313
687-0028
28062
81985
27542
28062
541-0053
3221-210
3221-218
449-0035
535-0110
CDM-8
64091
KRENDL MACHINE COMPANY
1201Spencerville Rd. Delphos, Ohio 45833 U.S.A
Phone:[phone] Fax:[phone] E-mail:[email protected]
PARTS LIST NO. 309 KRENDL BLOWER - 16AMP. 1 1/2 H.P.
NO WARRANTY ON NEW MOTORS INSTALLED BY CUSTOMER
NOTE:All prices are subject to change without notice.
All prices are F.O.B., Delphos, Ohio - U.S.A.
February 2021
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OURPARTNO.
KBL-001
KBL-002
KBL-003-309
KBL-004
KBL-005-309-A
KBL-005-309-B
KBL-006-309
KBL-007-309-A
KBL-007-309-B
KBL-008
KBL-009
KBL-010
KBL-011
KBL-012-309
KBL-013
KBL-014
KBL-015
KBL-016
141
KBL-018
KBL-PLUG
KBL-CORD
KBL-019
KBL-020
KBL-021
KBL-022
FW002
KBL-024-309
KBL-024-309-A
KBL-025
KBL-026-A
KBL-026-B
KBL-026-M
FSB016
KBL-028-A-AL
KBL-028-A-STL
KBL-028-B-AL
KBL-028-B-STL
FSB028
KBL-030-A-2
KBL-030-A-2.5
KBL-030-B-2
KBL-030-B-2.5
FSB009
KBL-033
FSB016
KBL-035
KBL-036
KBL-037
KBL-038-309-A
KBL-038-309-B
KBL-039
KBL-040
KBL-040-B
KBL-043
KBL-PIN
DESCRIPTION
BEARING,BALL
HOUSING,BR.END
NAMEPLATE
RETAININGRING
ARMATURE ASSY (120V)
ARMATURE ASSY (230V)
CYLINDER
FIELD ASSY (120V)
FIELD ASSY (230V)
BAFFLE
FLATSPRING
HOUSING,PL.END
SETSCREW,10-32
STUD
NUT,1/4-20UNC
WASHER,INT. LOCK
SCREW,GROUND
WASHER,INT. LOCK
CORDCLAMP,3/8”
CORDASSY.
PLUG(5-20P)
CORD 14-3SJX x 44” (CORD ONLY)
SWITCHASSY
BRUSHPLUG
BRUSHASSY
BRUSHHOLDER
#10LOCKWASHER-INTTOOTH
SCREW, 10-32 X 2 3/4”
SCREW, 10-24(OLDSTYLE)
RING,LOCKING
ENDPLATE(SMALL)
ENDPLATE(MEDIUM)
ENDPLATE,CASTALUM
SCREWS,F/ENDPLATE
FAN, SMALL,ALUM
FAN, SMALL, STEEL
FAN, MED,ALUM
FAN,MED,STEEL
SETSCREWS, F/FAN
CHAMBER,FAN,SMALL, 2”
CHAMBER,FAN, SMALL, 21/2”
CHAMBER,FAN,MED,2”
CHAMBER,FAN,MED,2 1/2”
SCREWS,F/FANCHAMBER
ADAPTER,ZINC(F/STLFANCHMB)
SCREWS,F/ZINCADAPTER
WASHER, SMALLFELT
WASHER,LARGEFELT
VENTFAN
MOTOR ONLY, 120V.
MOTOR ONLY, 230V.
CLIP,BRUSHF/FIEL(309/310)
CIRCUITBREAKER 17.5A
CIRCUITBREAKER8A.220V
SWITCHGUARD
CHOPPERPIN
SHAFT DIAMETER 9/16” CYLINDER 3 1/2” LONG
QUAN.
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KRENDL MACHINE COMPANY • 1201 SPENCERVILLE RD • DELPHOS, OHIO 45833 • TELEPHONE [phone] • FAX [phone]
[email protected] • www.krendlmachine.com
© February 2021 Krendl Machine Company
MODEL #309 BLOWER MAINTENANCE
1. Daily- The Krendl Model #309 Blower needs to be cleaned daily. To clean out your Model #309 Blower,
use a steady stream of pressurized air to remove any excess debris from the fan blades and the motor housing,
eliminating future problems with overheating of the motor. Use an air hose to blow a constant stream of
pressurized air into the motor housing of your Model #309 Blower. Be sure to concentrate the air into the vent
holes on both ends of the motor housing (the brush end, as well as the plate end of the motor housing). Any
build up of insulation in these vent holes can cause overheating and contamination of the motor housing,
voiding your warranty.
2. Weekly- Inspection of the intake fan is recommended to check for bent or worn blades. Damaged blades
can cause bearing failure in your Model #309 Blower.
3. Quarterly- In addition, a quarterly inspection of the brush mechanism in your Model #309 Blower will
help ensure motor life. Once your brush mechanism is worn to 1/4” thick, Krendl Machine Company recom-
mends replacing the brushes to avoid any damage to the motor.
MOTOR HOUSING
BRUSH END
PLATE END
INTAKE FAN
BRUSH MECHANISM
BLOWER MAINTENANCE