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505331M 06/09
3. Replace the stem cap and tighten as follows:
D
With Torque Wrench: Tighten finger tight and then
tighten per Table 1.
D
Without Torque Wrench: Finger tighten and use an
appropriately sized wrenched to turn an additional
1/12 turn clockwise as illustrated in Figure 2.
(VALVE STEM SHOWN
CLOSED) INSERT HEX
WRENCH HERE
VALVE STEM
FRONT-SEATED
TO OUTDOOR UNIT
SERVICE PORT
CORE
TO INDOOR
UNIT
SERVICE PORT
SERVICE PORT
CAP
CLOSED TO BOTH INDOOR
AND OUTDOOR UNITS
STEM CAP
Figure 4.
Angle−Type Service Valve
(Font−Seated Closed)
NOTE A label with specific torque requirements may be
affixed to the stem cap. If the label is present, use the
specified torque.
NOTE To prevent stripping of the cap, the wrench
should be appropriately sized and fit snugly over the cap
before tightening the cap.
SERVICE PORT
SERVICE PORT
CORE
TO OUTDOOR UNIT
STEM CAP
(VALVE STEM SHOWN OPEN)
INSERT HEX WRENCH HERE
SERVICE PORT CAP
TO INDOOR
UNIT
OPEN TO BOTH
INDOOR AND
OUTDOOR UNITS
Figure 5.
Angle−Type Service Valve
(Back−Seated Opened)
To Access Ball−Type Service Port:
A service port cap protects the service port core from
contamination and serves as the primary leak seal.
1. Remove service port cap with an appropriately sized
wrench.
2. Connect gauge to the service port.
3. When testing is completed, replace service port cap and
tighten as follows:
D
With Torque Wrench
: Finger tighten and then
tighten per Table 1.
D
Without Torque Wrench
: Finger tighten and use an
appropriately sized wrench to turn an additional
1/6 turn clockwise as illustrated in Figure 2.
BALL (SHOWN
CLOSED)
SERVICE PORT
CORE
TO INDOOR UNIT
TO OUTDOOR UNIT
TO
OPEN
ROTATE STEM
COUNTERCLOCKWISE 90°.
TO
CLOSE
ROTATE STEM
CLOCKWISE 90°.
SERVICE PORT
SERVICE PORT CAP
STEM CAP
VALVE
STEM
OPEN TO LINE SET WHEN VALVE IS CLOSED,
TO BOTH LINE SET AND UNIT WHEN VALVE IS
OPEN.
Figure 6. Ball−Type Service Valve
To Open and Close Ball−Type Service Valve:
A valve stem cap protects the valve stem from
contamination and assures a leak−free seal.
1. Remove stem cap with an appropriately sized wrench.
2. Use an appropriately sized wrenched to open. To open
valve, roate stem counterclockwise 90°. To close
rotate stem clockwise 90°.
3. Replace the stem cap and tighten as follows:
D
With Torque Wrench
: Finger tighten and then
tighten per Table 1.
D
Without Torque Wrench
: Finger tighten and use an
appropriately sized wrench to turn an additional
1/12 turn clockwise as illustrated in Figure 2.
NOTE A label with specific torque requirements may be
affixed to the stem cap. If the label is present, use the
specified torque.
Recovering Refrigerant from Existing
System5
Remove existing HCFC−22 refrigerant using one of the
following procedures:
METHOD 1:
If the existing outdoor unit is not equipped with shut−off
valves, or if the unit is not operational and you plan to use
the existing HCFC−22 to flush the system.
NOTE Use recovery machine instructions for specific
setup requirements.
1. Disconnect all power to the existing outdoor unit.
2. Connect to the existing unit a gauge set, clean
recovery cylinder and a recovery machine. Use the
instructions provided with the recovery machine on
how to setup the connections.
