Initial Setting And Test Run - Mitsubishi Electric CITY MULTI PAC-AH001-1 Installation Manual

9. Initial setting and test run

After the installation work, which was performed in accordance with the outdoor unit installation manual,
and after the AHU refrigerant piping work, drain piping work, electrical wiring work, AHU controller wiring
work, and switch setting, turn on the main power at least 12 hours before starting operation in accordance
with the outdoor unit installation manual.
Test run, initial setting
1. Start the fan of AHU.
2. Remove the CNRM connector inside the controller.
3. Start AHU using a Mitsubishi remote controller.
4. Set the operation mode to cooling mode, and set the temperature to 57 °F [13.9 °C].
5. Check that cool air blows.
6. Stop AHU using the remote controller.
7. Re-connect CNRM connector as it was.
8. Close the contact A1/A2 (close: ON, open: off)
NOTE
After 16-minute or more cooling operation, and when 33.8°F [1°C] or less of the thermistor
detection temperature for liquid pipe is detected for 3 minutes in a row, the linear
expansion valve will be closed to prevent freezing. The operation will be normal when
either of the following conditions is met.
• When 3 minutes have passed after 50 °F [10°C] or more of the thermistor detection
temperature for liquid pipe is detected.
• When 6 minutes have passed after the expansion valve was closed to prevent freezing.
PAC-AH001-1
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