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18-AC79D1-10E-EN 11

Section 13. Start Up

13.1 System Start Up

STEP 1 - Ensure Sections 7 through 12 have been completed.

STEP 2 - Set System Thermostat to OFF.

STEP 3 - Turn on disconnect(s) to apply power to the indoor and outdoor units.

STEP 4 - Wait one (1) hour before starting the unit if compressor crankcase heater accessory is used and the

Outdoor Ambient is below 70ºF.

STEP 5 - Set system thermostat to ON.

STEP 1 - Check the outdoor temperatures.

Subcooling (in cooling mode) is the only recom-

mended method of charging above 55º F ambi-

ent outdoor temperature. See Section 14.2.

Note: For Superheat (In Cooling Mode), refer to

the Superheat Charging Table

For best results the indoor temperature should

be kept between 70º F to 80º F.

Note: It is important to return in the spring or

summer to accurately charge the system in the

cooling mode when outdoor ambient tempera-

ture is above 55º F.

Section 14. System Charge Adjustment (Systems can be rated with TXV, EEV or Piston.

Ensure charging method is correct.)

14.1 Temperature Measurements

Indoor Temp

80º F

70º F

Outdoor Temp 1

55º F

120º F

Outdoor Temp 2

See Section 14.3 for

Outdoor

Temperatures

Below 55º F

See Section 14.2 for

Outdoor

Temperatures

Above 55º F

55º F

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