Emerson PA-00301 Hoja De Instrucciones página 2

On scroll compressors, install injection tube per diagram – note that it
installs at a slight angle (see diagram). Thread tube in handtight and
tighten ½ turn with a wrench or pliers.
10. With the solenoid off, mount and level the new control to existing
adapter using (3) 1/4" x 20 TPI x 1" bolts. If replacing an OMA with
an OMB, turn the ringed adapter flange approximately ¼ turn
counterclockwise to provide the correct hole alignment for the OMB
since the holes are not equidistant. (Important: Some older racks have
a flange with an O-ring groove machined in it. Replace with the correct
adapter for the application – see catalog.) Be sure that the O-ring has
not fallen out of the groove and tighten evenly to 40 in.-lbs.
11. Reconnect the oil inlet line.
12. With pressure valved off, remove gauge manifold, cap ports, open
service valves and check for leaks.
13. Reconnect electrical power following color code and install solenoid coil
and power plugs. Note: Do not energize solenoid coil before replacing
on enclosing tube.
14. Check that the green LED is on. Yellow LED should come on after
about 10 seconds.
15. C heck that the solenoid is energized and that the control is filling.
(Note: If crankcase does not fill in 2 minutes, the red LED should come
on.) (Solenoid remains on to continue filling.) If the alarm trips before
the crankcase is filled to ½ sight glass, remove OMB power plug for
several seconds and reinstall to reset alarm. Compressor should then
fill to ½ sight glass and yellow "fill" LED should go out.
16. Restart the compressor using the reverse procedure to shutting
it down.
17. Recheck for leaks and repair if necessary.
Important: Injection tube is not used on reciprocating compressors
where the control is mounted directly to the crankcase.
LED Codes When Lit:
Green – 24 VAC power is supplied to OMB.
Yellow – Float sensor determined that the oil level has been below
½ sight glass for over 10 seconds. Fill solenoid has been activated.
Red (continually lit) – Oil level has remained below ½ sight glass for
over two minutes after fill solenoid has been activated. Alarm has been
activated and compressor is prevented from operating until oil level
reaches ½ sight glass when alarm automatically resets.
Red (flashing) – There have been five auto reset alarms registered within
a 30 minute period. Alarm circuit is now locked on and compressor locked
off. Fill solenoid is de-energized. Alarm remains locked in until 24 VAC
power lead is manually unplugged and again plugged back into device.
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PA-00301 (09/14) Emerson is a trademark of Emerson Electric Co. ©2014 Emerson Climate Technologies, Inc. All rights reserved.
Note: OMB units used on scroll compressors require the use of an
injection tube this tube is shipped wired to the unit but not installed.
It is to be screwed into the rear of the unit, and tightened hand tight
plus one half turn. When properly installed, the tube will be at a slight
angle relative to the OMB. See figure 2 below.
Note: Use of crimp type wiring connectors is highly recommended. If
wire nuts must be used, taping joint after assembly with electrical tape is
required.
FIGURE 2