Emerson PA-00301 Hoja De Instrucciones

Instruction Sheet
PA-00301
September 2014
OMB Electronic Oil Level Management System
FEATURES
• Self contained unit with oil level sensor and integral solenoid to
manage oil level supply
• Hall-effect sensor for precise measurement of oil level
• Alarm and status indication by LEDs
• SPDT output contact for compressor shutdown or alarming
• Easy installation by sightglass replacement
• Adapters suitable for various types of compressors including
conventional and scroll compressors
• Signal generated by gravity based float – not prone to errors from
foaming like optical sensors
• Sacrificial magnet for reliable operation
SAFETY INSTRUCTIONS
WARNING: Before opening any system, make sure the pressure in the
system is brought to and remains at atmospheric pressure. Failure to
comply can result in personal injury and/or system damage.
WARNING: The OMB operates by using a strong magnetic sensor. It
is important to keep the control free of any steel or iron particles which
could accumulate on it during installation. These may hamper or prevent
the control from operating.
1. Read installation instructions thoroughly. Failure to follow instructions
may result in product failure, system damage, or personal injury.
2. Do not open system under pressure.
3. Ensure supply voltage is within specified OMB limits.
4. Disconnect supply voltage from system/OMB before installation/ser-
vice. Comply with local electrical regulations when wiring OMB.
5. Do not exceed maximum working pressure.
6. Keep temperature within nominal limits.
7. Work should be performed by qualified service personnel or a licensed
contractor.
SPECIFICATIONS
Maximum Working Pressure . . . . . . . . . . . . . . . . . . . . 870 psig
Solenoid MOPD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350 psig
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 VAC, 50/60 Hz
Solenoid Coil ASC2L . . . . . . . . . . . . . . . . . . . . . . . . . . 24 VAC, 50/60 Hz
Current Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . 0.6A
Time Delay for Low Level Signal . . . . . . . . . . . . . . . . . 10 seconds
Time Delay After Setpoint Recovery. . . . . . . . . . . . . . . 5 seconds
Alarm Delay Time (including alarm contact) . . . . . . . . . 120 seconds
Alarm Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPDT
Alarm Contact Rating . . . . . . . . . . . . . . . . . . . . . . . . . . 10A-125V,
Refrigerant Compatibility (not for use with . . . . . . . . . . HFC, HCFC, CFC
flammable refrigerants or ammonia)
Refrigerant Temperature. . . . . . . . . . . . . . . . . . . . . . . . -40° to 180°F
Storage and Ambient Temperature. . . . . . . . . . . . . . . . -40° to 120°F
Ambient Temperature (Housing). . . . . . . . . . . . . . . . . . -40° to 120°F
Oil Supply fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ¼ Male SAE
INSTALLATION INSTRUCTIONS
1. Read installation instructions thoroughly.
2. Assure that you have the appropriate mounting adapter kit for the
compressor. See adapter kit instruction sheet (PA-00316) for choosing
proper adapter and installation instructions.
3. O-ring replacement kit (KS30368) can be used on the OMB, OMA and
W-OLC controls.
EmersonClimate.com/FlowControls
OMB Electronic Oil Level Management System
5A-250V
INSTRUCTIONS FOR FIELD CHANGEOUT OF
OMA TO OMB OIL CONTROL
This instruction has been developed to minimize down time based
upon actual field experience. Read through the entire instruction before
proceeding with the change-out.
Tools Recommended: 7/16" nut driver; 7/16" open-end wrench;
adjustable wrench; small slotted screwdriver; wire stripper; manifold
gauge set; refrigeration valve wrench (Additional items which may be
required depending on application: 1' of ¼" refrigerant grade copper
tubing. 2 – ¼" brass flare nuts; flaring tool; 3/8" male flare by ¼" female
flare adapter; 3-electrical wire nuts).
1. Disconnect all electrical power to the compressor.
2. Safely connect gauge bar hoses in the following sequence: discharge
line to backseat port of an adjacent compressor service valve;
common line to oil pressure port on crankcase of compressor on
which control is to be changed; suction line to suction manifold on
compressor rack. (Manifold valves should be closed.)
3. Close discharge, suction, and oil feed service valves on compressor.
4. Open the gauge manifold discharge hand wheel to pressurize the
crankcase to discharge pressure. (Important: Do not exceed
allowable pressure limits set by the compressor manufacturer
for the crankcase.)
5. After pressurizing the crankcase to a safe pressure, close manifold
gage discharge wheel.
6. Open the gage manifold suction wheel to allow the high pressure in
the crankcase to meter the oil into the suction manifold.
7. After the oil is below the sight glass on the compressor crankcase,
close the suction hand wheel and safely reclaim the remaining
refrigerant pressure in the crankcase.
8. After all the pressure is depleted in the crankcase, remove the existing
oil control as follows:
A. Disconnect the electrical leads at the control and label each if wire
color codes change.
B. Remove flexible conduit (if used) at the junction box.
C. Disconnect the oil supply line. Note: A new one may need to be
fabricated, or an adapter required, if replacing an OMA with an OMB.
D. Remove the three flange mounting bolts which hold the control to
the adapter and remove existing control.
9. Install supplied O-ring in the O-ring groove of the new control. Remove
"knockout" from the junction box of the new control.