Absorption Chiller Maintenance - Pump Maintenance
When the electric motor and pump bearings fail, one design permits
replacement of pump parts without removing the lithium bromide solution from
the machine. The first step is closing the hand valves in the lubrication
circuit, disconnecting the electrical supply, and removing the motor. The
pump shaft seal maintains machine vacuum. Major pump repairs are
accommodated by charging the machine with nitrogen to atmospheric pressure.
Once complete, the machine is evacuated, and pump parts removed and repaired
or replaced. Other designs require a more complicated replacement procedure.
Pump maintenance begins with the magnetic
strainer which must be cleaned 2 weeks after the initial startup and at the
mid-point in the cooling season. Shaft seals should be examined for wear at
three year intervals.