Page 5
XC21 SERIES
(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
ANGLE−TYPE
SERVICE VALVE
(FRONT−SEATED
CLOSED)
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
ANGLE−TYPE SERVICE VALVE
(BACK−SEATED OPENED)
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
WHEN SERVICE VALVE IS CLOSED, THE SERVICE PORT IS OPEN TO THE
LINE SET AND INDOOR UNIT.
BALL−TYPE SERVICE
VALVE
SERVICE VALVES
VARIOUS TYPES
WHEN SERVICE VALVE IS OPEN, THE SERVICE PORT IS OPEN TO LINE SET,
INDOOR AND OUTDOOR UNIT.
To Access 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 set to service port.
3. When testing is completed, replace service port cap and tighten as fol-
lows:
1
2
3
4
5
6
7
8
9
10
11 12
1/6 TURN
Operating Angle Type Service Valve:
1. Remove stem cap with an appropriately sized wrench.
2. Use a service wrench with a hex−head extension (3/16" for liquid line valve sizes and 5/16" for vapor line valve
sizes) to back the stem out counterclockwise as far as it will go.
Operating Ball Type Service Valve:
1. Remove stem cap with an appropriately sized wrench.
2. Use an appropriately sized wrenched to open. To open valve, rotate stem counterclockwise 90°. To close rotate stem clockwise 90°.
Reinstall Stem Cap:
Stem cap protects the valve stem from damage and serves as the primary seal. Replace the stem cap and
tighten as follows:
S
With Torque Wrench: Finger tighten and then torque cap per table 1.
S
Without Torque Wrench: Finger tighten and use an appropriately sized wrench to turn an additional 1/12 turn
clockwise.
NOTE A label with specific torque requirements may be affixed to the stem cap. If the label is present, use the specified torque.
S
With Torque Wrench: Finger tighten and torque cap per table 1.
S
Without Torque Wrench: Finger tighten and use an appropriately
sized wrench to turn an additional 1/6 turn clockwise.
1
2
3
4
5
6
7
8
9
10
11 12
1/12 TURN
Figure 2. Angle and Ball Service Valves
Summary of Contents for XC21
Page 21: ...Page 21 XC21 SERIES Figure 8 Typical XC21 Wiring ...
Page 39: ...Page 39 XC21 SERIES Figure 19 High Pressure Switch Operation ...
Page 40: ...Page 40 506518 01 Figure 20 Low Pressure Switch Operation ...
Page 41: ...Page 41 XC21 SERIES Figure 21 High Discharge Temperature Sensor Operation ...
