Daikin SWP Series Installation Manual page 12

Cooling circuits
1 . Close all the refrigerant service valves on each circuit .
2 . Tag the valves as a warning for the technician who will
be restarting the units .
3 . If the unit has already been filled with cooling tower
water, drain the unit completely . The condenser (and
waterside economizer if it has one) is (are) mechanically
cleanable, remove the condenser head tube plugs and
thoroughly clean . See
Gasket Replacement" on page
4 . Flush the internal condensate trap with antifreeze
solution if the unit will be subjected to freezing
temperatures .
5 . Once a month, manually stroke the control valves to
prevent seizing .
IM 1032-2 • Self-Contained Air Conditioning System
"Condenser Head Assembly and
42 .
Restart
After extended storage, a very complete start up must be
performed . Inevitable accumulations of dirt, insect nests, etc .
can contribute to problems if not cleaned out thoroughly prior to
start up . In addition, thermal cycling will have tended to loosen
mechanical and electrical connections . The following start up
procedure will help discover these and other issues that may
have developed during the storage interval .
Prior to Start Up
1 . Set screws on bearings, fan wheels, and sheaves need
to be checked for proper torque . Also check bolt torque
for any taper lock hubs either on the wheel or sheaves .
2 . Check sheaves for corrosion. Significant corrosion can
cause belt or sheave failure .
3 . Purge old grease from fan bearings while rotating the
shaft to distribute the new grease evenly and prevent
bearing seal failure .
4 . Correctly align and tension belts . See
Alignment" on page 38
page 39 .
12
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nsTallaTIon
"Drive Sheave
and "Drive Belt Adjustment" on
www .DaikinApplied .com