JOHNSON CONTROLS
46
FORM 160.67-O2
ISSUE DATE: 10/9/2020
SECTION 2 - PRE-STARTUP AND SYSTEM OPERATING PROCEDURES
2.
Clean all linkage systems and inspect for wear. On
the turbine, clean and oil or grease all the moving
parts (fulcrum points). For units with inlet operat-
ing temperatures above 500 F a high temperature
grease (DuPont Krytox) is required for lubrication
on linkage parts.
Semi-Annually (or more often as required)
1. Remove and inspect turbine journal and thrust
bearings.
2. Change and inspect compressor oil filter.
3. Check controls and safety cutouts.
4. Check the steam turbine sentinel warning valve
and steam condenser relief valve to ensure they
are operational. The relief valve should start open-
ing when the sentinel valve opens and should be
completely open when the pressure in the turbine
casing is 10% above normal pressure.
5.
Inspect and clean coupling between turbine and
compressor. Disassemble and inspect thoroughly
if any question about reliability
6.
Operate the turbine without load and inspect gov-
ernor operation. Check for excessive vibrations.
7.
Check the effectiveness of all steam condensate
drains.
8.
On compressor oil return system:
Change dehydrator.
Check nozzle of eductor for foreign particles.
Annually (more often if necessary)
If quarterly inspection indicates oil is fine,
replacing the oil is not necessary.
1. Drain and replace the oil in the compressor oil
sump. (See “Oil Charging Procedure” Section 4
of this manual.)
2.
Evaporator and Condenser.
a. Inspect and clean water strainers.
b. Inspect and clean tubes as required.
c. Inspect end sheets.
3. Inspect and service electrical components as neces-
sary.
4. Perform refrigerant analysis.
5.
Remove and clean the Steam Strainer on the Tur-
bine, refer to the product specific Service manual
for instructions.
6.
Inspect turbine shaft seals.
7. Check thrust bearing end play.
8.
Remove and check the operation of the turbine
Sentinel Warning Valve, refer to the product spe-
cific Service manual for instructions.
9.
Drain and Clean KD turbine Oil Reservoir.
Change oil filter with oil change.
10. Clean the steam governor valve according to
product specific Service instructions.
11.
Perform Oil Analysis on the KG turbine design.
Change the oil.
12.
Check and recalibrate pressure gauges. Check all
level indicating devices and clean as necessary.
13. Inspect and Clean tubes as necessary in all water
cooled heat exchangers on the system.
3 Year
1. Open and inspect turbine internals. Refer to SEC-
TION 6 - TURBINE INTERNAL INSPECTION
and SECTION 7 - STEAM PURITY/ TURBINE
DEPOSITS for additional information.
2.
Inspect the rotor, blades and nozzles for pitting
and damage.
3. Inspect the Labyrinth Seals
4. Inspect the bearings for signs of excessive wear.
5.
Inspect the End Seals
NEED FOR MAINTENANCE OR SERVICE
If the system is malfunctioning in any manner or the
unit is stopped by one of the safety controls, consult
the “Operation Analysis Chart”,
Section 5 of this manual. After consulting this chart,
if you are unable to make the proper repairs or adjust-
ments to start the chiller or the particular trouble con-
tinues to hinder the performance of the unit, please call
the nearest Johnson Controls District Office. Failure to
report constant troubles could damage the unit and in-
crease the cost of repairs.
