Lennox TSA036H4N41 Installation Instructions Manual page 3

LOW HIGH
PRESSURE PRESSURE
GAUGE MANIFOLD
TO
HFC−410A
DRUM
Each service valve is equipped with a service port which
has a factory−installed valve stem.
1/6 TURN
11 12
1
2
10
9 3
4
8
7 5
6
Figure 2. Cap Tightening Distances
IMPORTANT
To prevent stripping of the various caps used, the
appropriately sized wrench should be used and
fitted snugly over the cap before tightening.
Operating Angle−Type Service Valve
To Access Angle−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
D
tighten per table 1.
Without Torque Wrench: Finger tighten and use an
D
appropriately sized wrench to turn an additional
1/6 turn clockwise as illustrated in figure 2.
LIQUID LINE
SERVICE VALVE
COMPRESSOR
FILTER DRIER
Figure 1. Typical Manifold Gauge Connection Setup
1/12 TURN
11 12
1
2
10
9 3
4
8
5
7
6
OUTDOOR UNIT
OUTDOOR
COIL
SUCTION LINE
SERVICE VALVE
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
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: Finger tighten and then
D
tighten per table 1.
Without Torque Wrench: Finger tighten and use an
D
appropriately sized wrench to turn an additional
1/12 turn clockwise as illustrated in figure 2.
NOTE − A label with specific torque requirement may be
affixed to the stem cap. If the label is present, use the
specified torque.
NOTE− To prevent stripping of the cap, the appropriately
sized wrench should fit snugly over the cap before
tightening the cap.
SERVICE PORT CAP
SERVICE PORT
CORE
CLOSED TO BOTH
INDOOR AND
OUTDOOR UNITS
VALVE STEM
FRONT-SEATED
TO INDOOR
UNIT
TO OUTDOOR UNIT
Figure 3. Angle−Type Service Valve
(Font−Seated Closed)
Page 3
(Uncased Coil Shown)
TXV
VALVE IS FRONT−SEATED
(CLOSED)
SERVICE PORT
(VALVE STEM SHOWN
CLOSED) INSERT HEX
WRENCH HERE
STEM CAP
TSA*H4 SERIES