Technical information

UGH021/0301 VL Series Portable Chillers, 2 to 40 Tons
Page: 41
C. Backflushing procedure:
1. Turn off all power to the machine. For chillers with a
reservoir tank, drain the tank to below the evaporator
outlet. For chillers without a reservoir tank, drain total unit.
2. Connect a water supply hose to the evaporator water
outlet. If acid cleaning, connect the discharge hose from
the acid pump to the evaporator outlet port.
3. Connect a hose to the evaporator water supply port and to
an appropriate containment vessel. If acid cleaning,
connect the evaporator water inlet port to an acid solution
reservoir tank. Dispose of all backflush fluid according to
local codes.
4. The cleaning fluid source should have at least 20 psi
available. If acid cleaning, follow the instructions supplied
with the acid solution carefully.
5. When the procedure is complete, reinstall all water lines to
original factory orientation. Restart the unit and check for
proper operation.
6. Note: this procedure is not normal maintenance.
Maintaining proper water quality and filtration will
minimize the need to backflush the evaporator.