Marley Primus P11, User Manual

Page: 33 / 40

33
Every 2 months: Lubricate fan shaft bearings. While rotating equipment
by hand, grease the bearings until a bead forms around the seals—a
maximum charge of 0.55 ounces is recommended. Chevron SRI-2 grease
is recommended.
Annually: Relubricate motor. Refer to motor manufacturer’s
recommendations. Remove grease fill and relief plugs from front of motor
and remove hardened grease with a wire or similar item, Add grease until
grease is forced out at relief hole. Replace fill plug, run
¹⁄₂
to 1 hour and
replace relief plug.
Check to see that all bolts are tight in the fan and mechanical equipment
region, including the fan cylinder and fan guard.
Check belt tension and condition.
Check makeup float valve seals—replace as required.
Clean and disinfect cooling tower with biocides. Systems with biofouling,
high general bacterial counts, or positive cultures of legionella may require
additional cleaning. Refer to Cooling Tower Cleaning section on page 24
Consult your water treatment expert as to prudent biological evaluation
testing.
If basin silt level is significant, drain the basin and clean it out. Refer to
Cooling Tower Cleaning section on page 26.
Inspect the tower thoroughly, making maximum use of instructions given
in the separate service manuals. Check structural bolted connections and
tighten as required. Make preventive maintenance repairs as necessary.
Seasonal Shutdown Instructions
When the system is to be shut down for an extended period of time, it is
recommended that the entire system (cooling tower, system piping, heat
exchangers, etc.) be drained. Leave the basin drains open.
During shutdown, clean the tower (see Warning, page 24) and make any
necessary repairs. Pay particular attention to mechanical equipment.
Following each year’s shutdown and cleaning, inspect the tower’s metal
surfaces for evidence of the need to apply a protective coating. Do not
misinterpret grime—and transient rust from the piping system—as a need
Maintenance
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