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IMPORTANT
This performance check is ONLY valid on systems that have clean indoor and outdoor coils, proper airflow over coils,
and correct system refrigerant charge. All components in the system must be functioning properly to correctly perform
compressor operational check. (Accurate measurements are critical to this test as indoor system loading and outdoor
ambient can affect variations between low and high capacity readings).
SL18XP1 Start-Up and Performance Checklist
Customer Address
Indoor Unit Model Serial
Outdoor Unit Model Serial
Solar Module Mfg and Model Serial
Notes:
START-UP CHECKS
Refrigerant Type:
Rated Load Amps Actual Amps Rated Volts Actual Volts
Condenser Fan Full Load Amps Actual Amps:
COOLING MODE
Vapor Pressure: Liquid Pressure:
Supply Air Temperature: Ambient Temperature: Return Air Temperature:
HEATING MODE
Vapor Pressure: Liquid Pressure:
Supply Air Temperature: Ambient Temperature: Return Air Temperature:
System Refrigerant Charge (Refer to manufacturer's information on unit or installation instructions for required
subcooling and approach temperatures.)
Subcooling:
A — B = SUBCOOLING
Saturated Condensing Temperature (A)
minus Liquid Line Temperature (B)
Approach:
A — B = APPROACH
Liquid Line Temperature (A)
minus Outdoor Air Temperature (B)
Indoor Coil Temp. Drop (18 to 22°F)
A — B = COIL TEMP DROP
Return Air Temperature (A)
minus Supply Air Temperature (B)
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