Lennox AC13 -018, Руководство по установке

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Page 4
506109−01 10/08
OUTDOOR
COIL
TO
HCFC−22
DRUM
LOW
PRESSURE
COMPRESSOR
SUCTION LINE
SERVICE VALVE
TXV OR FIXED
ORIFICE
GAUGE MANIFOLD
HIGH
PRESSURE
LIQUID LINE
SERVICE VALVE
OUTDOOR UNIT
(UNCASED COIL SHOWN)
Figure 3. Typical Gauge Manifold Connections
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 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:
With Torque Wrench : Tighten finger tight and then
tighten per table 1.
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.
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:
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
1/6 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 : 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.
NOTE − A label with specific torque requirements may be
affixed to the stem cap. If the label is present, use the
specified valve listed.