York YST - Other Recommendations; Steam Condenser Off-Season Storage; Turbine Lubrication System

JOHNSON CONTROLS
48
FORM 160.67-O2
ISSUE DATE: 10/9/2020
SECTION 2 - PRE-STARTUP AND SYSTEM OPERATING PROCEDURES
• Electric magnetic heaters can be applied to the
casing to help keep the turbine dry.
• The turbine rotor should be rotated 450° once a
week to eliminate any permanent bowing. Bear-
ings must receive lubrication before this is done.
• All valves need to be exercised.
Turbine Lubrication System
The following procedures are recommended for pre-
paring the lubrication system for off-season storage:
• The complete lubrication system must be drained
and cleaned. NEVER STORE A TURBINE
WITH OLD OIL IN IT. Contaminants in the oil
may cause the turbine shaft to become etched un-
der the journal bearings.
• All low points in the lubrication system should
be checked for moisture and cleaned as required.
Low points include bearing cases, power cylin-
ders, drive gear cases, pilot valves, oil reservoir,
etc.
• Fresh oil should be circulated through the lubrica-
tion system prior to storage.
• Cooling water to oil coolers should be positively
shut o or disconnected. Drain water from cooler
if freezing temperatures are expected.
Other Recommendations
If the turbine is to be idle for a period longer than eight
months, Johnson Controls Service office should be
consulted as to the proper storage procedures. Any
other questions or concerns regarding off-season stor-
age should be directed to the Johnson Controls Service
office.
Steam Condenser Off-Season Storage
The following procedures are recommended for pre-
paring the steam condenser system for off-season stor-
age:
• If freezing temperatures are expected, the com-
plete system including all pumps and piping must
be drained. Fill the vacuum pump(s) with rust
inhibited 50% ethylene glycol solution. Every 4
weeks, rotate the motor by hand at the external
fan.
• If system is not drained and lled with a stor-
age solution, the vacuum and condensate pumps
should be run for a short period every 4 weeks
during the o season. Prior to operating the
pumps, prepare the valves as described above un-
der PRE-STARTUP PROCEDURES – INITIAL
AND AFTER LONG TERM SHUTDOWN.