Manitowoc Ice 11M manual Back-flowPreventer Maintenance, Shipping, Storage and Relocation, Section

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Back-flow Preventer Maintenance

Section 4	Maintenance

Back-flow Preventer Maintenance

The integral carbonator in this unit is equipped with a back-flow preventer designed to protect the potable water supply from CO2 contamination.

Important

The back-flow preventer must be checked at least once every year to confirm that it is functioning properly.

1.Shut OFF power to unit.

2.Shut OFF potable water supply to unit. Do not shut OFF CO2 supply.

3.Remove top cover panel of unit and disconnect inlet fitting from back-flow preventer.

NOTE: The carbonator tank is still pressurized.

4.Observe inlet of backflow preventer #1 check for any discharge. If there is no discharge, #1 check is OK. Proceed to step 5. If there is discharge, proceed to step 6.

5.Disconnect and carefully remove #1 check assembly. Avoid losing any internal parts.

6.Observe inlet of #2 check for any discharge. If there is no discharge, #2 check is OK. Proceed to step 7. If there is discharge, proceed to step 5.

7.Shut OFF CO2 supply and relieve pressure from carbonator tank.

8.Remove back-flow preventer and install new backflow preventer. Turn ON CO2 supply and check for leaks.

9.Check water supply strainer upstream of backflow preventer. Clean out and/or replace as required.

10.Reconnect water lines and turn water supply ON.

11.Turn ON power to unit.

Shipping, Storage and Relocation

!Caution

Before shipping, storing, or relocating this unit, syrup systems must be sanitized. After sanitizing, all liquids (sanitizing solution and water) must be purged from the unit. A freezing environment causes residual sanitizing solution or water remaining inside the unit to freeze, resulting in damage to internal components.

Part Number 020001552 5/11

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Contents Model 11M Root Beer System Refrigeration Unit Installation, Use & Care ManualAmerica’s Quality Choice in Refrigeration Procedural Notices Safety NoticesRead These Before Proceeding PERSONAL INJURY POTENTIALSection Installation Table of Contents continued SectionAttention Marine Installations SpecificationsEquipment Placement Table of Contents continuedTower Installation Connecting Insulated ConduitSection Before Calling for Service Table of Contents continued Section MaintenanceBeverage System Cleaning Bag-In-BoxSystem SanitationTHIS PAGE INTENTIONALLY LEFT BLANK Section General Information How to Read a Model NumberSection Read This ManualSpecifications AccessoriesATTENTION MARINE INSTALLATIONS Special ApplicationsSerial Plate Location Warranty InformationSection Kit assembly includes Section InstallationGeneral UNPACKING AND INSPECTINGDimensions and Clearances InstallationTop View Side ViewBLADE TOWER REMOTE CONDENSERSafe Installation Dos and Don’ts CLEARANCES Location RequirementsRATINGS REQUIREMENTS FOR POST MIX UNITSSPECIFICATIONS Installer InstructionsElectrical Ambient Location RequirementGROUNDING INSTRUCTIONS PLUMBING POTABLE WATER Plumbing/Water SupplyPLUMBING REQUIREMENTS - GENERAL Drain Hose ConnectionSingle Tower Plumbing PLUMBING CIRCUIT DIAGRAMS - MODEL 11M ROOT BEERModel 11M Root Beer Dual Tower Plumbing 2-10Model 11M Root Beer Three Tower Plumbing 2-11EQUIPMENT PLACEMENT Refrigeration Unit InstallationTOWER INSTALLATION CONNECTING INSULATED CONDUITConnecting conduit at the refrigeration unit CONNECTING SUPPLY LINES2-13 Proceed with the Following TestsConnect the drain Proper John Guest Fitting Installation2-14 PROPER USE OF JOHN GUEST FITTINGSModel 11M Connections 2-15Control Switches Aeroquip Connection Condenser and Pre-chargedLines Installation2-16 INSULATING CONNECTIONS2-17 INSTALLING THE MULTIPLEX REMOTE CONDENSERPRE-CHARGEDREFRIGERATION LINE REQUIREMENTS TESTING CO2 CIRCUIT FOR LEAKS CONNECTING THE PRE-CHARGED REFRIGERATION LINESTESTING SYRUP CIRCUIT 5 GALLON TANKS ONLY 2-18Preparing Ice Bank Start-Up2-19 BUILDING AN ICE BANK2-20 Installation ChecklistObserve the pump operations for leaks Check the water bath for full ice bankOperation Section OperationTypical System Water FiltersSERVICE ACCESS WATER BATH ACCESSHow the Multiplex Works Sequence of OperationEQUIPMENT SETUP PROCEDURE Equipment Setup and Close ProcedureEQUIPMENT CLOSE PROCEDURE Start-upSection Maintenance Section MaintenanceBEVERAGE SYSTEM CLEANING SanitizingFIGAL BEVERAGE SYSTEM Shipping, Storage and Relocation Back-flowPreventer MaintenanceSection Before Calling for Service Section Before Calling for ServiceChecklist Section Before Calling for ServiceTHIS PAGE INTENTIONALLY LEFT BLANK Page Part Number 020001552 5/11