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506120−01 03/10
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:
With Torque Wrench
: Finger tighten and then
tighten per table 1.
Without Torque Wrench
: Finger tighten and use an
appropriately sized wrench to turn an additional
1/6 turn clockwise as illustrated in figure 1.
To Open and Close Angle−Type Service Valve:
A valve stem cap protects the valve stem from
contamination and assures a leak−free seal.
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 3.
Angle−Type Service Valve
(Back−Seated Opened)
1. Remove stem cap with a wrench.
2. Use a service wrench with a hex−head extension
(3/16" for liquid-line valve sizes and 5/16" for
suction-line valve sizes) to back the stem out
counterclockwise as far as it will go.
3. Replace the stem cap and tighten as follows:
With Torque Wrench
: Tighten finger tight and then
tighten per table 1.
Without Torque Wrench
: Finger tighten and use an
appropriately sized wrench to turn an additional
1/12 turn clockwise as illustrated in figure 1.
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:
With Torque Wrench
: Finger tighten and then
tighten per table 1.
Without Torque Wrench
: Finger tighten and use an
appropriately sized wrench to turn an additional
1/6 turn clockwise as illustrated in figure 1.
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 a wrench.
2. Use an appropriately sized wrench to open. To open
valve, rotate stem counterclockwise 90°. To close
rotate stem clockwise 90°.
3. Replace the stem cap and tighten as follows:
With Torque Wrench
: Finger tighten and then
tighten per table 1.
Without Torque Wrench
: Finger tighten and use an
appropriately sized to wrench turn an additional
1/12 turn clockwise as illustrated in figure 1.
BALL (SHOWN
CLOSED)
SERVICE PORT
CORE
TO INDOOR UNIT
TO OUTDOOR UNIT
TO
OPEN
ROTATE STEM
COUNTERCLOCKWISE 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.
TO
CLOSE
ROTATE STEM
CLOCKWISE 90°.
Figure 4. Ball−Type Service Valve
Recovering Refrigerant from Existing
System
Remove existing refrigerant using one of the following
methods:
METHOD 1:
Use this method if the existing outdoor unit is not equipped
with manual shut−off valves, and plan on using existing
HCFC−22 refrigerant to flush the system.
Perform the following task:
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 recover machine on how
to setup the connections.
3. Remove all HCFC−22 refrigerant from the existing
system. Check gauges after shutdown to confirm that
the entire system is completely void of refrigerant.
