Page 4
506270−01 05/09
OUTDOOR
COIL
CHECK
EXPANSION VALVE
BI−FLOW
FILTER /
DRIER
TO
HFC−410
A DRUM
LOW
PRESSURE
COMPRESSOR
REVERSING VALVE
VAPOR
LINE
VALVE
MUFFLER
NOTE − ARROWS INDICATE DIRECTION
OF REFRIGERANT FLOW.
CHECK EXPANSION VALVE
INDOOR UNIT
HEAT PUMP
LIQUID
SERVICE
PORT
GAUGE MANIFOLD
DISTRIBUTOR
INDOOR
COIL
VAPOR
SERVICE
PORT
HIGH
PRESSURE
LIQUID
LINE
VALVE
Figure 2. Typical Manifold Gauge Connection Setup
(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 3. 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.
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 4. Angle−Type Service Valve
(Back−Seated Opened)
NOTE− To prevent stripping of the cap, the wrench should
be appropriately sized and fit snugly over the cap before
tightening the cap.
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.
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 5. Ball−Type Service Valve
To Next Page
Loading...
Need help?
General