Triple Evacuation Method (Alternate); Charging - Daikin M Series Service And Troubleshooting

SERVICING
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.
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1000
500
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Triple Evacuation Method (Alternate)

1. Evacuate the system to 4000 microns and hold for 15
minutes. Break the vacuum with dry nitrogen, bring
the system pressure to 2-3 PSIG, and hold for 20
minutes. Release the nitrogen,
2. Evacuate to 1500 microns and hold for 20 minutes.
Break the vacuum with dry nitrogen again, bring the
system pressure back to 2-3 PSIG, and hold for 20
minutes.
3. Evacuate the system to 500 microns and hold for 60
minutes.
4. If the pressure rises to 1000 microns or less and
remains steady the system is considered leak free;
proceed to start-up.
LEAK(S)
PRESENT
CONDENSIBLES OR SMALL
LEAK PRESENT
NO LEAKS
NO CONDENSIBLES
3 4 5 6 7 8 9
10
MINUTES
LOW SIDE
GAUGE
AND VALVE
Evacuation

Charging

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.
Only use refrigerant certified to AHRI standards. Used
refrigerant may cause compressor damage. Goodman is not
responsible for damage or the need for repairs resulting
from the use of unapproved refrigerant types or used or
recycled refrigerant. Most portable machinces cannot clean
used refrigerant to meet AHRI standards.
Operating the compressor with the suction valve closed will
cause serious compressor damage.
Charge the system with the exact amount of refrigerant.
See unit nameplate for the correct refrigerant charge
amount.
An inaccurately charged system will cause future
problems.
1. Using a charging scale, weigh in the refrigerant
charge amount listed on unit nameplate. Allow liquid
refrigerant only to enter the high side.
HIGH SIDE
GAUGE
AND VALVE
WARNING
CAUTION
CAUTION
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