Manitowoc Ice S1800 service manual Refrigeration System Operational Analysis Tables

Refrigeration System								Section 7
REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES
				S Models Dual Expansion Valve - Ice Machine Model Number_________________
				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
	Ice Production				Air-Temperature Entering Condenser_____________
					Water Temperature Entering Ice Machine_________
					Published 24 hour ice production________________
					Calculated (actual) ice production_______________
					NOTE: The ice machine is operating properly if the ice fill patterns is normal and ice production is within 10% of charted
					capacity.
	Installation and Water System				All installation and water related problems must be corrected before proceeding with chart.
	Ice Formation Pattern				Ice formation is extremely	Ice formation is extremely	Ice formation normal	Ice formation normal
					thin on outlet of evaporator	thin on outlet of one side of	-or-	-or-
	Left Side__________________				-or-	evaporator	Ice formation is extremely	No ice formation on entire
					No ice formation on the one	-or-	thin at inlet of one side of	evaporator
					side of evaporator	No ice formation on entire	evaporator
	Right Side_________________					evaporator	-or-
							No ice formation on entire
							evaporator
	Safety Limits
	Refer to “Analyzing Safety Limits” to				Stops on safety limit:	Stops on safety limit:	Stops on safety limit:	Stops on safety limit:
	eliminate all non-refrigeration				1 or 2	1 or 2	1 or 2	1 or 2
	problems.
	Freeze Cycle
	Discharge Pressure				If discharge pressure is High or Low refer to freeze cycle high or low discharge pressure problem checklist to eliminate
_____			______	______
					problems and/or components not listed on this table before proceeding.
	1 minute		Middle	End
	into cycle
	Freeze Cycle				If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist to eliminate
	Suction Pressure				problems and/or components not listed on this table before proceeding.
_____			______	______	Suction pressure is	Suction pressure is	Suction pressure is	Suction pressure is
					High	Low or Normal	High	High
	1 minute		Middle	End
	Wait 5 minutes into the freeze cycle.				One harvest valve inlet is	Both harvest valve inlets are	Both harvest valve inlets are	Both harvest valve inlets
	Compare temperatures of				Hot	Cool enough to hold hand	Cool enough to hold hand	are Cool enough to hold
					-and-	on	on	hand on
	compressor discharge line
					approaches the temperature	-and-	-and-	-and-
	and both harvest valve inlets.				of a Hot compressor	the compressor discharge	the compressor discharge	the compressor discharge
					discharge line.	line is Hot.	line is Cool	line is Hot.
							enough to hold hand on.
	Discharge Line Temperature				Discharge line temperature	Discharge line temperature	Discharge line temperature	Discharge line
	Record freeze cycle discharge line
					160°F (71.1°C)	160°F (71.1°C)	less than	temperature 160°F
	temperature at the end of the freeze
					or higher at the end of the	or higher at the end of the	160°F (71.1°C) at the end	(71.1°C) or higher at the
	cycle				freeze cycle	freeze cycle	of the freeze cycle	end of the freeze cycle
		_________°F (°C)
	Final Analysis					Low On Charge
	Enter total number of boxes checked				Harvest Valve Leaking	-Or-	TXV Flooding	Compressor
	in each column.					TXV Starving

7-18 Part Number 80-1634-3