Testing
1. Notes:
•
Installation MUST be complete prior to testing.
•
System MUST be tested prior to operation.
2. Leakage Test
•
Use standard A/C practices to properly check refrigeration tubes and connections for any
leaks prior to system start up.
3. Pressure Testing
•
Remove bonnet (cover) of gas valve on outdoor unit.
Charge system with Nitrogen to 100 PSI and check for
leaks. Evacuate Nitrogen.
•
Connect the gas valves of a vacuum guage, vacuum
pump, and outdoor unit. (see diagram)
•
Start the vacuum pump and allow to run for at least 30
minutes at a level of 500 microns or less.
•
Shut off the vacuum and continue to monitor vacuum
guage for another 15 minutes. The pressure should not
rise above 800 microns.
•
If a vacumm of 500 microns cannot be obtained, or if it
rises above 800 microns during the 15-minute monitoring
period, pressurize the system with nitrogen and look for
leaks. Repair any leaks that are found and repeat the vacuum testing.
•
Close the valves to the vacuum pump and guage and disconnect from the outdoor unit.
•
Tighten bonnet (cover) of gas valve and open gas and liquid valves completely.
4. System Testing
•
Before testing the system, ensure that cut-off valves of the connection pipes are opened
and that all debris (such as packing scraps, thrums, etc.) are cleared from the unit.
•
Switch on power to the system and press the “ON/OFF” button on the remote control to
activate the indoor unit.
•
Press “MODE” button repeatedly, taking a moment on each setting to ensure that system
functions in all modes. (Note: HEAT mode will only function on
heat pump models.)
•
If the remote control is lost, emergency run operation can be
initiated by pressing the the button in the upper right corner of
the indoor unit under the cover panel. (see diagram)
5. Installation Verification
•
Have both units been securely and firmly installed?
•
Are all piping connections secure?
•
Have the refrigeration lines been sufficiently insulated?
•
Have you verified the length of the connection pipes and the refrigerant capacity?
•
Have you conducted all leakage and system tests?
•
Does the unit drain properly?
•
Are all electrical connections in compliance with local standards?
•
Has the unit been properly grounded?
•
Is the power cord specified?
•
Are all air inlets and outlets free from obstruction?
Vacuum gauge
Bonnet
Liquid pipe
Gas pipe
Vacuum pump
Emergency
button
10
