Back-flow preventer maintenance, Shipping, storage and relocation – Manitowoc Ice MULTIPLEX 11M User Manual
Page 37
Section 4
Maintenance
4-3
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 CO
2
contamination.
1. Shut OFF power to unit.
2. Shut OFF potable water supply to unit. Do not shut
OFF CO
2
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 CO
2
supply and relieve pressure from
carbonator tank.
8. Remove back-flow preventer and install new
backflow preventer. Turn ON CO
2
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
Important
The back-flow preventer must be checked at least
once every year to confirm that it is functioning
properly.
! 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.