REPAIR & ADJUSTMENTS
6.5
the relief valve to simulate rising pressure.)
7. After you have set the pressure switches you should adjust the relief valve clock
wise until the relief setting is reading 3600-3800 PSI on gauge #23. Lock the re-
lief valve jam nut and release control relay CR17.
8. Reset the min-volume adjustment to a position where approx. inches of adjust-
ment screw threads are exposed outside the jam nut when the jam nut is locked
in place.
Note: Shifting the pump #2 swashplate to max-volume setting by overriding control
relay CR17 while you are adjusting the min-volume adjustment provides easier
turning of the adjustment screw.
Replace control relay CR10 into its base.
The final adjustment (if necessary) on the maximum flow and minimum flow of
pump #2 are made by reviewing the actual amp load on the electric motor when the
cylinder is extruding ice. (The max full load amps is 60)
A. If the amp reading exceeds 60 amps when the pressure gauge is climbing from
650 PSI to 2800 PSI during the extrude cycle then the max-volume control
needs to be adjusted inward to decrease the pump flow to an amount where
the amp reading is less than 60 amps.
Likewise if the amp load measures considerably less than 60 amps when the control-
ler shifts at 2900 PSI then the max-volume adjustment screw could be backed out to
increase the pump flow. (The ideal circumstance is to draw exactly 60 amps when
the pump pressure reaches the shift point of 2900 PSI.)
Note: Remember the max-volume adjustment screw can be adjusted much easier
when the pump is shifted to min-volume operation.
B. When the pressure switch reaches 2900 PSI and shifts pump #2 to the min-
volume position you will see a significant drop in amp draw on the ammeter.
Then you will see an increase to a peak amp load and then possibly a minimal
drop off before the cylinder reaches the end of stroke. The ideal circumstance
Содержание DE89RB- 1000
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Страница 7: ...INTRODUCTION SECTION 1 0 1 ...
Страница 15: ...CARBON DIOXIDE SAFETY SECTION 2 0 2 ...
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Страница 19: ...INSTALLATION SECTION 3 0 3 ...
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Страница 25: ...OPERATION MAINTENANCE SECTION 4 0 4 ...
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Страница 49: ...TROUBLE SHOOTING SECTION 5 0 5 ...
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Страница 55: ...REPAIR ADJUSTMENTS SECTION 6 0 6 ...
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Страница 67: ...APPENDIX SECTION 7 0 7 ...
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