8
The Deep Vacuum Method requires a vacuum pump
rated for 500 microns or less. This method is an eective
and ecient way of assuring the system is free of non-
condensable air and moisture. As an alternative, the Triple
Evacuation Method is detailed in the Service Manual for
this product model.
It is recommended to remove the Schrader Cores from the
service valves using a core-removal tool to expedite the
evacuation procedure.
1. Connect the vacuum pump, micron gauge, and
vacuum rated hoses to both service valves.
Evacuation must use both service valves to eliminate
system mechanical seals.
2. Evacuate the system to less than 500 microns.
3. Isolate the pump from the system and hold vacuum
for 10 minutes (minimum). Typically, pressure will
rise slowly during this period. If the pressure rises
to less than 1000 microns and remains steady, the
system is considered leak-free; proceed to system
charging and startup.
4. If pressure rises above 1000 microns but holds
steady below 2000 microns, non-condensable air
or moisture may remain or a small leak is present.
Return to step 2: If the same result is achieved
check for leaks and repair. Repeat the evacuation
procedure.
5. If pressure rises above 2000 microns, a leak is
present. Check for leaks and repair. Repeat the
evacuation procedure.
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0 1 2 3 4 5 6 7 8 9
10
LEAK(S)
PRESENT
MINUTES
V
ACUUM
IN
MICRONS
CONDENSIBLES OR SMALL
LEAK PRESENT
NO LEAKS
NO CONDENSIBLES
GENERAL NOTES:
Adequate refrigerant charge for the matching indoor coil and
15 feet of line set is supplied with the heat pump unit. If liquid
line set exceeds 15 feet in length, refrigerant should be added
at 0.6 ounces per foot of liquid line.
NOTICE
ALL UNITS SHOULD HAVE A HIGH VOLTAGE POWER SUPPLY
CONNECTED 2 HOURS PRIOR TO STARTUP.
WARNING
REFRIGERANT UNDER PRESSURE!
• DO NOT OVERCHARGE SYSTEM WITH REFRIGERANT.
• DO NOT OPERATE UNIT IN A VACUUM OR AT NEGATIVE
PRESSURE. FAILURE TO FOLLOW PROPER PROCEDURES MAY
CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
CAUTION
OPERATING THE COMPRESSOR WITH THE SUCTION VALVE
CLOSED WILL CAUSE SERIOUS COMPRESSOR DAMAGE - SUCH
DAMAGE IS NOT COVERED BY OUR WARRANTIES.
CAUTION
USE REFRIGERANT CERTIFIED TO AHRI STANDARDS. USED RE-
FRIGERANT MAY CAUSE COMPRESSOR DAMAGE, AND IS NOT
COVERED BY THE WARRANTY. MOST PORTABLE MACHINES
CANNOT CLEAN USED REFRIGERANT TO MEET AHRI STAN-
DARDS.
Liquid and suction valves on heat pump unit are closed to
contain the charge within the unit. The unit is shipped with the
valve stems closed and caps installed.
CAUTION
PROLONGED OPERATION AT SUCTION PRESSURES LESS THAN
-
HEATING OF THE SCROLLS AND PERMANENT DAMAGE TO THE
SCROLL TIPS, DRIVE BEARINGS AND INTERNAL SEAL.
WARNING
HIGH VOLTAGE
DISCONNECT ALL POWER BEFORE SERVICING
OR INSTALLING THIS UNIT. MULTIPLE POWER
SOURCES MAY BE PRESENT. FAILURE TO DO SO
MAY CAUSE PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH. DO NOT SERVICE THIS UNIT
WITHOUT FIRST INSURING THAT:
THE ELECTRICAL ACCESSORIES ARE INSTALLED ONLY IN
THE PRE-DRILLED MOUNTING HOLES.
THE ELECTRICAL WIRING IS NOT INSTALLED AND DOES NOT
HANG BELOW THE PRE-DRILLED MOUNTING HOLE OR LIE
IN THE UNIT BASE PAN.
NOTICE
VIOLATION OF EPA REGULATIONS MAY RESULT IN FINES OR
OTHER PENALTIES.
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