Liquid & Suction Line Service Valves - Lennox HS40 Series Installation Instructions Manual

EXISTING
INDOOR COIL
RECOVERY
CYLINDER
Liquid & Suction Line Service Valves
The liquid line and suction line service valves (figures 5 and
6) and gauge ports are accessible from outside the unit.
The service ports are used for leak testing, evacuating,
charging and checking charge.
The valves are equipped with a service port. A Schrader
valve is factory−installed. A service port cap is supplied to
protect the Schrader valve from contamination and to
serve as the primary leak seal.
To Access Schrader Port:
1 − Remove the service port cap with an adjustable wrench.
2 − Connect gauge to the service port.
3 − When testing is completed, replace the service port cap.
Tighten finger tight, then an additional 1/6 turn.
To Open Liquid or Suction Line Service Valve:
1 − Remove the stem cap with an adjustable wrench.
2 − Use a service wrench with a hex−head extension to
back the stem out counterclockwise until the valve
stem just touches the retaining ring.
DANGER
Do not attempt to backseat this valve. Attempts to
backseat this valve will cause snap ring to explode
from valve body under pressure of refrigerant. Per
sonal injury and unit damage will result.
3 − Replace the stem cap. Tighten finger tight, then tighten
an additional 1/6 turn.
FLUSHING CONNECTIONS
INVERTED R22
CYLINDER
(Contains clean
R22 to be used for
flushing)
EXISTING SUCTION LINE
EXISTING LIQUID LINE
TANK RETURN
INLET
DISCHARGE
RECOVERY MACHINE
HS40 UNIT
SUCTION LINE
SERVICE VALVE
LIQUID LINE
SERVICE VALVE
FIGURE 4
LIQUID AND SUCTION LINE SERVICE VALVES
INSERT HEX
WRENCH HERE
SERVICE
PORT
UNIT SIDE
SERVICE
PORT
SCHRADER
CAP
SERVICE
PORT
UNIT SIDE
SERVICE
PORT CAP
SCHRADER VALVE OPEN
TO LINE SET WHEN VALVE IS
CLOSED (FRONT SEATED)
Page 6
LOW HIGH
PRESSURE PRESSURE
GAUGE MANIFOLD
OPENED CLOSED
NOTE − The inverted R22 cylin
der must contain at least the
same amount of refrigerant as
was recovered from the existing
system.
(VALVE OPEN)
VALVE
(VALVE CLOSED)
RETAINING RING
STEM CAP
INSERT HEX
WRENCH HERE
(VALVE FRONT SEATED)
FIGURE 5
STEM CAP
FIELD SIDE
FIELD SIDE