Johnson Controls Frick RWF II User Manual

RWF II ROTARY SCREW COMPRESSOR UNITS
MAINTENANCE
070.610-IOM (JUN 11)
Page 25
4. SLOWLY vent separator to lowside system pressure
using the bypass line on the suction trap. NOTE: Recover
or transfer all refrigerant vapor, in accordance with local
ordinances, before opening to atmosphere. The separator
MUST be equalized to atmospheric pressure.
Oil-entrained refrigerant may vapor-
ize, causing a separator pressure
increase. Repeat venting and recov-
ery procedure, if necessary.
5. Make replacement or repair. NOTE: Replace all gaskets
and Orings with new ones. Suction Strainer: remove, inspect
and clean as necessary and replace using a new gasket.
6. Isolate the low pressure transducer, PE4, to prevent
damage during pressurization and leak test.
7. Pressurize unit and leak test.
8. Evacuate unit.
9. Open suction and discharge service valves, low pressure
transducer, and also liquid injection and economizer service
valves, if applicable.
10. Close disconnect switches for compressor and oil pump
motor starters.
11. Unit is ready to put into operation.
12. Perform checkpoints on prestart checklist, then start unit.
OIL FILTER (OF-1) MAIN SINGLE/DUAL
RWF II compressor units are furnished with one main oil
lter (OF1). A second oil lter (OF2) is installed as optional
equipment to facilitate the changing of the lter element(s)
without unit shutdown.
Use of lter elements other than
Frick
®
may cause warranty claim to
be denied.
The procedure to change lter cartridge(s) is as follows:
1. If a single oil lter is installed, push [STOP] key on mi
croprocessor panel to shut down unit, then open discon nect
switches for compressor and oil pump motor starters.
If dual oil lters are installed, open the outlet, then inlet
service valves of the standby lter.
Open inlet service valve slowly to
prevent a sudden pressure drop
which could cause an oil lter dif-
ferential alarm.
2. Close outlet then inlet service valves of lter being serviced.
3. Open bleed valve and purge pressure from the oil lter
cartridge. NOTE: Recover or transfer all refrigerant vapor,
in accordance with local ordinances, before opening to
atmosphere.
4. Remove the plug from the bottom of the lter canister
and drain the oil. Remove the canister cover and discard the
gasket. Remove the screws securing the lter assembly. Pull
the lter assembly from the canister and discard the gasket
and the element.
5. Flush the canister with clean compressor oil; wipe dry
with a clean, lintfree cloth; and replace the plug.
6. Install a new element* and tighten the nut on the end
plate to 10 ftlb torque. Then, while holding the nut with a
wrench, apply a second nut to act as a locknut. Replace the
gasket and reinstall the lter assembly into canister, securing
with screws tightened to 7 ftlb torque. Fill the canister with
new Frick refrigeration oil.
*After January 2010, the SuperFilter
™
II element was changed
to a single piece. The rod and nuts were eliminated and the
end plate and gasket are now part of the lter. Refer to the
Oil Filter page in the SPL for detailed graphic.
DO NOT MIX OILS of different
brands, manufacturers, or types.
Mixing of oils may cause excessive
oil foaming, nuisance oil level cutouts, oil pressure loss,
gas or oil leakage and catastrophic compressor failure.
Replace the gasket and reinstall the canister cover. Torque
cover bolts rst to nger tight, then 65 ftlb, then 130 ftlb.
7. Close purge valve.
8. Open outlet service valve and leak test.
9. Filter is ready to place in service.
STRAINER - DEMAND OIL PUMP
To clean the demand oil pump strainer, the unit must be shut
down. The procedure is as follows:
1. Push [STOP] key on microprocessor panel to shutdown
unit, then open disconnect switches for compressor and oil
pump motor starters.
2. Close strainer inlet service valve.
3. Open drain valve located in the strainer cover and drain
oil into a container.
4. Remove capscrews securing strainer cover, strainer cover,
gasket and element. Retain gasket.
5. Wash element in solvent and blow clean with air.
6. Wipe strainer body cavity clean with a lintfree clean
cloth.
7. Replace cleaned element, gasket and reattach cover using
retained capscrews.
8. Close drain valve and open strainer inlet service valve.
9. Check for leakage.
10. Close disconnect switches for compressor and oil pump
motor starters.
11. Start the unit.
STRAINER - LIQUID INJECTION
To clean the liquid injection strainer the unit must be shut
down. The procedure is as follows:
1. Push [STOP] key on microprocessor panel to shut down
unit, then open disconnect switches for compressor and oil
pump motor starters.
2. Close liquid supply service valve located before liquid
solenoid.

Johnson Controls Frick RWF II Specifications

General

Brand	Johnson Controls
Model	Frick RWF II
Category	Air Compressor
Language	English