Manitowoc Marine Q 1000, Руководство по обслуживанию

Страница: 46 / 62

42
Refrigeration System
Q Model Dual Expansion Valve
Refrigeration System Operational Analysis Table
This table must be used with charts, checklists and other references to eliminate refrigeration components not listed on the table
and external items and problems which can cause good refrigeration components to appear defective.
Operational Analysis 1 2 3 4
(listed below)
Ice Production
Published 24 hour ice production _____________
Calculated (actual) ice production _____________
NOTE: The ice machine is operating properly if the ice production
and ice formation pattern is normal
Safety limits
Stops on safety limit: Stops on safety limit: Stops on safety limit: Stops on safety limit:
Refer to "Analyzing
Safety Limits" to
eliminate problems
and/or components not
listed on this table
1 1 1 1 or 2
Ice Formation Pattern Ice formation is
extremely thin on top
of one side of
evaporator
Ice formation is
extremely thin on top
of one or both sides of
evaporator
Ice formation normal Ice formation normal
-or- -or-
Left side_______________
Ice formation is
extremely thin on
bottom of one side of
evaporator
No ice formation on
entire evaporator
_______________________
Right side______________
_______________________
-or- -or-
No ice formation on
one side of
evaporator
No ice formation on
entire evaporator -or-
No ice formation on
entire evaporator
Wait 5 minutes into the
freeze cycle.
Compare temperatures
of compressor discharge
line and both hot gas
valve inlets.
Comp. Disc. ______
° F
Left gas inlet ______ ° F
Right gas inlet ______ ° F
One hot gas valve
inlet is Hot
Both hot gas valve
inlets are cool enough
Both hot gas valve
inlets are cool enough
Both hot gas valve
inlets are cool enough
to hold hand on to hold hand on -and- to hold hand on
-and- -and- approaches the
temperature of a Hot
compressor discharge
line.
-and-
the compressor
discharge line is Hot.
the compressor the compressor
discharge line is cool
enough
discharge line is Hot.
to hold hand on.
Freeze cycle
DISCHARGE pressure
_______ _______ _______
1 minute Middle End
into cycle
If discharge pressure is High or Low refer to a freeze cycle high or low discharge pressure problem
checklist to eliminate problems and/or components not listed on this table before proceeding.
Freeze cycle
SUCTION pressure
If suction pressure is High or Low refer to a freeze cycle high or low suction pressure problem
checklist to eliminate problems and/or components not listed on this table before proceeding.
________ _______ _______ Suction pressure is Suction pressure is Suction pressure is Suction pressure is
Beginning Middle End High Low High High
Miscellaneous
Enter items in proper boxes.
Final Analysis
Hot gas valve leaking Low on charge TXV Flooding
Enter total number of
boxes checked in each
column.
Compressor
-or-
TXV Starving
MANITOWOC ICE, INC.
2110 South 26th Street P.O. Box 1720 Manitowoc, WI 54221-1720
Phone: (920) 682-0161 Service Fax: (920) 683-7585 Web Site - www.manitowocice.com