Alliance Laundry Systems BU170S Service Manual Page 48
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46
70422201R1
Adjustments
29.Loading Door Strike (200 Pound
Models)
The loading door strike must be adjusted to have
sufficient tension to hold loading door closed against
force of load tumbling against it. Proper adjustment is
when 8-15 pounds (35.6-66.7 N) pull is required to
open door.
If adjustment is required, refer to Figure 5 and proceed
as follows:
To adjust, open door, loosen adjustment screws and
position strike for desired magnet engagement.
Retighten screws.
Figure 5
30.Belt Drive
The drive assemblies consist of motors, belts, eyebolts
and a step pulley.
The pulley diameters are sized to produce a cylinder
speed of 37-39 RPM for 120 pound models or
29-31 RPM for 170 and 200 pound models.
The step pulley assembly is used for speed reduction
as well as a means of adjusting belt tension. The pulley
mounting plate is attached to the cabinet. The frame
mounting plate has vertically slotted holes allowing up
and down movement of the step pulley mounting plate
for belt adjustment.
Adjust the belt tension as follows:
1. Disconnect electrical power to the tumble dryer
before attempting any adjustments to the drive
assembly.
2. Loosen pulley mounting plate bolts.
3. Loosen the upper nut on the final drive eyebolt.
4. Rotate the lower nut of the final drive eyebolt
clockwise until proper belt tension is achieved.
5. Rotate upper nut clockwise against the lower nut
in order to lock it into place.
6. Tighten pulley mounting plate bolts. Recheck
belt tension.
7. If necessary, adjust the drive motor belt tension
eyebolt using a similar procedure.
8. Adjust blower belt tension on 120 pound
50 Hertz tumble dryers and all 170 pound tumble
dryers using a similar procedure.
NOTE: Proper tensions for new belts are measured
with a Belt Tension Gauge:
Using a Belt Tension Gauge, the motor belt
deflection should be 0.31 inch at five pounds
pressure, and final drive belt deflection should be
0.25 inch at five pounds pressure.
Belts should not slip or make any noise when starting
up under normal load.
TMB2359N
1 Door Strike
2 Adjustment Screws
1
2
Drive Motor Final Drive Blower
Initial
After
Run-in Initial
After
Run-in Initial
After
Run-in
120 60-70 45-55 70-80 55-65 60-70 50-55
170 60-70 45-55 70-80 55-65 75-80 60-65
200 60-70 45-55 70-80 55-65 65-70 55-60
Table 1
- STRIAL TUMBLE DRYERS 1
- Table of 3
- Contents 3
- 70422101R1 4
- Section 1 5
- Safety Information 5
- Safety Warnings and Decals 7
- Tumblers 7
- Section 2 8
- Introduction 8
- Customer Service 10
- Serial Plate Location 10
- How a Tumble Dryer Works 11
- Operation 12
- Temperature Sensor 13
- Modes of Operation 14
- Section 3 15
- Troubleshooting 15
- 1. Motor Does Not Start 16
- 4. Motor Does Not Stop 19
- 6. No Heat Condition 21
- 7. Gas Burner Does Not Ignite 22
- 12.Clothes Do Not Dry 27
- 13.Tumble Dryer Overheating 28
- TMB2357S 34
- TMB2319S 35
- TMB2368S 36
- 21.Cylinder Is “Stained” 39
- Section 4 40
- Call the fire department 41
- TMB2199N 44
- SUPPRESSION 45
- Section 5 46
- Adjustments 46
- 27.Airflow Switch 47
- Pound Models) 47
- 30.Belt Drive 48
- 31.Cylinder Clearance 49
- TMB1786S 50
- 32.Drive Belt Tension 51
- 33.Fan Belt Tension 52
- Section 6 53
- 34.Control Has No Display 54
- 36.Motor Will Not Start/Run 58
- 37.Unit Will Not Heat – Gas 60
- 38.Error Codes 63
- Section 7 64
- 39.Control Has No Display 65
- 40.Door Open Indicator 67
- 41.Motor Will Not Start/Run 70
- 43.Error Codes 75
- Section 8 76
- Is there line voltage 77
- TMB2387S 79
- 45.No Drive Motor Rotation 80
- LED OPL Error Display: E Cab 83
- Is there 24 volts AC 85
- 48.Airflow Errors 87
- LED OPL Error Display: E FnCs 89
- 50.Close Door Indication 91
- 51.Moisture Sensor Error 93
- Figure 9 95
- Figure 10 96
- (Refer to Figure 11) 97
- Figure 12 98
- Machine Basket Removed 99
- Figure 13 100
- 58.Fan Motor Contactor Error 101
- TMB2383S 102
- 59.Rotation Sensor Error 103
- Rotation Sensor Error 104
- 60.Shorted or Open Thermistor 105
- Shorted or Open Thermistor 106
- SEE VOLTAGE 107
- OPTION DIAGRAM 107
- PROGRAMMING DIP SWITCHES 108
- (SEE INSTALLATION MANUAL 108
- FOR SWITCH DETAILS.) 108
- 63.Electronic Control Testing 109
- 70422201R1 110
- Diagnostic Test Descriptions 111
- Production Test Cycle 116
- 64.Diagnostic Testing 117
- Diagnostic Menu 117
- Test Menu 117
- Test Cycle Chart 118
- Inputs Outputs Menu 119
- Alarms Menus 120
- Machine ID Menu 120
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