Samsung AR18MRJSBWKXMG manual Performing final check and trial operation, Pumping down refrigerant

Installation

Step 4.3 Performing final check and trial operation

1Check the following:

•Strength of the installation site

•Tightness of pipe connection to detect gas leak

•Electric wiring connection

•Heat-resistant insulation of the pipe

•Drainage

•Grounding conductor connection

•Correct operation (Take the following steps.)

2Press the (Power) button on the remote control to check the following:

•The indicator on the indoor unit lights up.

•The airflow blade opens and the fan gears up for operation.

3Press the (Mode) button to select Cool or Heat mode. Then take the following sub-steps:

•In Cool mode, use the Temperature button to set the set temperature to 16 °C.

•In Heat mode, use the Temperature button to set the set temperature to 30 °C.

•Check whether, approximately 3 to 5 minutes later, the outdoor unit starts, and a cool or warm air blows out.

•After12 minutes of stationary condition, check the indoor unit air treatment.

4Press the (Air swing) button to check whether the airflow blades work properly.

5Press the (Power) button to stop the trial operation.

Pumping down refrigerant

Pump-down is an operation intended to collect all the system refrigerant in the outdoor unit. This operation must be carried out before disconnecting the refrigerant tubing in order to avoid refrigerant loss to the atmosphere.

1Shut off the liquid valve with the Allen wrench.

2Turn on the air conditioner in cooling with fan operating at high velocity. (Compressor will immediately start, provided 3 minutes have elapsed since the last stop.)

3After 2 minutes of operation, shut the suction valve with the same wrench.

4Turn off the air conditioner and switch mains supply off.

5Disconnect tubing. After disconnection, protect valves and tubing ends from dust.

CAUTION

•Compressor damage may occur if the compressor is run at a negative suction pressure.

Pumping down for removing the product

1Turn on th air conditioner and select Fast Cool mode.

2Let the compressor run for more than 5 minutes. If the compressor does not operate for more than 5 minutes due to protection control, wait about 2 minutes, and then carry out the next procedure.

3Release the valve caps on High and Low pressure side.

4Use L-wrench to close the valve on the high pressure side.

5After approximately 1 minute, close the valve on the low pressure side.

6Stop operation of the air conditioner by pressing the (Power) button on the indoor unit or remote control.

7Disconnect the pipes.

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