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

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 4-3