Lennox Elite XP16−024−230 Installation Instructions Manual page 25

GAUGE SET
CONNECTIONS FOR OPTIMIZING SYSTEM CHARGE
INSIDE OUTDOOR UNIT
OUTDOOR UNIT
CHECK / EXPANSION
VALVE
BI−FLOW FILTER / DRIER
LIQUID LINE
SERVICE PORT
NOTE − Use gauge ports on vapor line valve and liquid valve for evacuating refrigerant lines and
indoor coil. Use true suction port to measure vapor pressure during charging.
TRUE SUCTION PORT
B
CONNECTION
NOTE Refrigerant tank should be
turned right−side−up to deliver vapor
during charge optimizing procedure.
CHARGE IN
LIQUID PHASE
TEMPERATURE SENSOR (USE FOR
SUBCOOLING METHOD)
A Close manifold gauge set valves and connect the center hose to a cylinder of HFC−410A. Set for liquid phase charging.
B Connect the manifold gauge set's low pressure side to the true suction port.
C Connect the manifold gauge set's high pressure side to the liquid line service port.
D Position temperature sensor on liquid line near liquid line service port (use only for subcooling method).
Figure 21. Gauge Set Connections for Adding Refrigerant
OUTDOOR
MUFFLER
COMPRESSOR
Figure 22. Heat Pump Cooling Cycle
MANIFOLD GAUGE SET
LOW
REFRIGERANT
TANK
A
DIGITAL SCALE
TO LIQUID
LINE SERVICE C
VALVE
D
DISTRIBUTOR
REVERSING VALVE
COIL
TRUE SUCTION
PORT
CHECK / EXPANSION VALVE
Page 25
HIGH
OUTDOOR UNIT
TEMPERATURE SENSOR
(LIQUID LINE)
NOTE − ARROWS INDICATE DIRECTION
OF REFRIGERANT FLOW
INDOOR UNIT
VAPOR
SERVICE
PORT
INDOOR
COIL
XP16 SERIES