Lennox Elite Series Installation Instructions Manual page 4

DISTRIBUTOR
CBECK REV " sAT:UvA E
EXPANSION VALVE _ \
DR,ER OUTo tOR "-
LOW
HIGH MUFFLER
PRESSURE PRESSURE ___ ]
LIOUID *o
_ CHECK EXPANSION VALVE --
NOTE - Arrows indicate direction
of refrigerant flow.
INDOOR UNIT
INDOOR
COIL
Figure 2. Typical Manifold Gauge Connection Setup
To Open and Close Angle-Type Service Valve:
A valve stem cap protects the valve stem from
contamination and assures a leak-free seal,
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,
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 wrenched to turn an additional
1/12 turn clockwise as illustrated in figure 1.
SERVICE PORT
CAP _-
SERVICE PORT
SERVICE PORT
CLOSED) INSERT HEX
WRENCH HERE
VALVE STEM
FRONT-SEATED
TOINDOOR
UNIT
TO OUTDOOR
STEM CAP
CLOSED TO BOTHINDOOR
AND OUTDOOR UNITS
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.
NOTE- To prevent stripping of the cap, the wrench should
be appropriately sized and fit snugly over the cap before
tightening the cap.
SERVICE PORT CAP
SERVICE PORT SERVICE PORT
CORE
OPEN TO BOTH
(VALVE STEM SHOWN OPEN)
INDOOR AND INSERT HEX WRENCH HERE
OUTDOOR UNITS
TO INDOOR
UNIT
STEM CAP
TO OUTDOOR UNIT
Figure 4. Angle-Type Service Valve
(Back-Seated Opened)
To Access Bali-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.
505329M 04/08
Page 4