Lennox AC13 -018 Installation Instructions Manual page 4

LOW HIGH
PRESSURE PRESSURE
GAUGE MANIFOLD
TO
HCFC−22
DRUM
S
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 CAP
SERVICE PORT
CORE
OPEN TO BOTH
INDOOR AND
OUTDOOR UNITS
TO INDOOR
UNIT
TO OUTDOOR UNIT
Figure 4. 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:
S
With Torque Wrench: Tighten finger tight and then
tighten per table 1.
S
Without Torque Wrench: Finger tighten and i\use
an appropriately sized wrench to turn an additional
1/12 turn clockwise as illustrated in figure 1.
506109−01 10/08
LIQUID LINE
SERVICE VALVE
Figure 3. Typical Gauge Manifold Connections
SERVICE PORT
(VALVE STEM SHOWN OPEN)
INSERT HEX WRENCH HERE
STEM CAP
OUTDOOR UNIT
OUTDOOR
COIL
SUCTION LINE
SERVICE VALVE
COMPRESSOR
Operating Ball−Type Service Valve
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:
S
With Torque Wrench: Tighten finger tight and then
tighten per table 1.
S
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:
S
With Torque Wrench: Tighten finger tight and then
tighten per table 1.
S
Without Torque Wrench: Finger tighten and use an
appropriately sized wrench to turn an additional
1/12 turn clockwise as illustrated in figure 1.
NOTE − A label with specific torque requirements may be
affixed to the stem cap. If the label is present, use the
specified valve listed.
Page 4
(UNCASED COIL SHOWN)
TXV OR FIXED
ORIFICE