Lennox XP16 Series Unit Information page 51

Checklists
Two−Stage Modulation Compressors Field Operational Checklist
Unit Readings
COMPRESSOR
Voltage
Amperage
OUTDOOR UNIT FAN MOTOR
Amperage
TEMPERATURE
Ambient
Outdoor Coil Discharge Air
Compressor Discharge Line
Indoor Return Air
Indoor Coil Discharge Air
PRESSURES
Suction (Vapor)
Liquid
XP16 Start−Up and Performance
Customer
Indoor Unit Model
Outdoor Unit Model
Notes:
START UP CHECKS
Refrigerant Type:
1st Stage: Rated Load Amps
2nd Stage: Rated Load Amps
Outdoor Unit Fan Full Load Amps
COOLING MODE
Suction Pressure: 1st Stage:
Liquid Pressure: 1st Stage:
Supply Air Temperature: 1st Stage:
Temperature: Ambient:
System Refrigerant Charge (Refer to manufacturer's information on unit or installation instructions for required subcool-
ing and approach temperatures.)
Subcooling:
Saturated Condensing Temperature (A)
minus Liquid Line Temperature (B)
Approach:
Liquid Line Temperature (A) minus
Outdoor Air Temperature (B)
Indoor Coil Temperature Drop (18 to 22°F)
Return Air Temperature (A) minus
Supply Air Temperature (B)
XP16
Expected results during Y2
demand (Toggle switch On)
Y1 − First-Stage
Actual Amps
Actual Amps
Actual Amps: 1st Stage
A
A
A
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Same
Higher
Same or Higher
Same
Higher
Higher
Same
Lower
Lower
Higher
Address
Serial
Serial
Rated Volts
Rated Volts
2nd Stage:
2nd Stage:
2nd Stage:
Return Air:
B
B
B
Y2 − Second-Stage
Actual Volts
Actual Volts
2nd Stage
SUBCOOLING
=
APPROACH
=
COIL TEMP DROP
=