DuPont 134A ユーザーズマニュアル

Retrofit Checklist for

Suva

134a, Suva

HP62, or Suva

507

_____

1. Establish baseline performance with R-12, R-502, or R-22. (See data sheet for

recommended data.)

_____

2. Consult the original equipment manufacturer of the system components for

recommendations on the following:

• Plastics compatibility

• Elastomers compatibility

• Lubricant (viscosity, manufacturer)

• Retrofit procedure to sustain warranty

_____

3. Drain lubricant charge from the refrigerant system (unless polyol ester lubricant

is already in the system).

• Remove majority of lubricant from system.

• Measure amount of lubricant removed and record: _______________.

_____

4. Charge polyol ester lubricant using amount equivalent to amount of mineral oil

removed. Run system with R-12, R-502, or R-22 for 24 hours, minimum.

_____

5. Repeat lubricant drain and POE charging two more times or until mineral oil

content is less than 5%.

_____

6. Remove R-12, R-502, or R-22 charge from system. (Need 10–20 inHg vacuum

[34–67 kPa].)

_____

7. Replace filter drier with new drier approved for use with Suva

134a, Suva

HP62, or

Suva

507.

_____

8. Reconnect system and evacuate with vacuum pump. (Evacuate to full vacuum

[29.9 inHg vacuum/0.14 kPa].)

_____

9. Leak-check system. (Reevacuate system following leak check.)

_____ 10. Charge system with Suva

• Initially charge 75% by weight of original equipment manufacturer R-12, R-502,

or R-22 charge.

• Amount of refrigerant charged: _______________.

_____ 11. Start equipment and adjust charge until desired operating conditions are

achieved. If low in charge, add in increments of 2–3% of original R-12, R-502,
or R-22 charge.

• Amount of refrigerant charged: _______________.

• Total refrigerant charged:

_______________.

_____ 12. Label components and system for type of refrigerant (Suva

134a, Suva

HP62, or

Suva

507) and lubricant (polyol ester).

Retrofit is complete.