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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).
XP20 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)
HIGH-PRESSURE SWITCH (S4)
This unit is equipped with a high-pressure switch which is located on the liquid line. The SPST, normally closed pressure
switch opens when liquid line pressure rises above the factory setting of 590 + 15 psig and automatically resets at 418 + 15
psig.
