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Section 4
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
contamination.
2
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 CO
supply.
2
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
supply and relieve pressure from
2
carbonator tank.
8. Remove back-flow preventer and install new
backflow preventer. Turn ON CO
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.
Part Number 000003912 6/17
supply and check
2
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.
Maintenance
4-3
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