Lennox XC21 Series

Page 51
XC21
Start−Up and Performance Checklist
Customer Address
Indoor Unit Model Serial
Outdoor Unit Model Serial
Notes:
START UP CHECKS
Refrigerant Type:
First Stage: Rated Load Amps Actual Amps Rated Volts Actual Volts
Second Stage: Rated Load Amps Actual Amps Rated Volts Actual Volts
Condenser Fan Full Load Amps Actual Amps: First Stage Second Stage
COOLING MODE
Suction Pressure: First Stage: Second Stage:
Liquid Pressure: First Stage: Second Stage:
Supply Air Temperature: First Stage: Second Stage:
Temperature: Ambient: Return Air:
System Refrigerant Charge (Refer to manufacturer’s information on unit or installation instructions for required subcooling and approach tempera-
tures.)
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 Temperature Drop (18 to 22°F) A

B
=
COIL TEMP DROP
Return Air Temperature (A)
minus Supply Air Temperature (B)