Lubrication - Baltimore Aircoil Company VFL Series Operating And Maintenance Instructions Manual

SPRAY WATER PUMP
The BAC pump contains a mechanical seal between pump housing and pump motor. This seal needs to be
checked quarterly for proper operation and replaced if necessary.
ELECTRIC WATER LEVEL CONTROL PACKAGE (OPTIONAL)
The electric water level control package (optional) maintains a constant water level in the cold water sump
independent of cooling load changes and water supply pressure variations. Ensure every six months that all
components (valve, float switches) are operational and clean.
During commissioning the tower should be filled manually till overflow level (push float ball under) to prevent air
suction of the pump during first start-up.
CAUTION
When disassembling the float switch for cleaning, make sure to reassemble it in exactly the same
position, otherwise it will not function correctly.

Lubrication

FAN SHAFT BEARINGS
The fan shaft is supported by ball bearings (see figure below).
Under normal operating conditions the bearings should be greased every 2000 operating hours or at least every six
months. The bearings should be lubricated with one of the following water resistant inhibited greases (or an
equivalent), which are good for ambient temperature ranging from -20°C to 120°C or an equivalent.
Ball bearing
1. Lube fitting
2. Locking collar
The bearings should be lubricated only with a hand grease gun. Do not use high-pressure grease guns, since they
may rupture the bearing seals. When lubricating, purge the old grease from the bearing by gradually adding grease
until a bead of new grease appears at the seal. In particular when extended lubrication lines are fitted ensure that
ALL old grease is removed and that new grease is leaving the seal.
For grease products see table below.
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5 Maintenance Procedure
5 Maintenance Procedure
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