Lennox International Inc. 10ACB - Manual (Page 6)

3DJH 
3-- Replace stem cap. Tighten finger tight, then tighten
an additional 1/6 turn.
FIGURE 5
SUCTION LINE SERVICE VALVE (VALVE OPEN)
SCHRADER
VALVE
SERVICE PORT
SERVICE PORT
CAP
INSERT HEX
WRENCH HERE
TO INDOOR
COIL
TO OUTDOOR
COIL
STEM CAP
SCHRADER VALVE OPEN
TO LINE SET WHEN VALVE IS
CLOSED (FRONT SEATED)
SERVICE
PORT
SERVICE PORT
CAP
RETAINING RING STEM CAP
INSERT HEX
WRENCH HERE
SUCTION LINE SERVICE VALVE (VALVE CLOSED)
(VALVE FRONT
SEATED)
TO INDOOR
COIL
TO OUTDOOR
COIL
5--Ton Suction Line (Ball Type) Service Valve
A ball-type full service valve only is used on five ton units
(10ACB60/62). These suction line service valves function
the same way, differences are in construction. Valves are
not rebuildable. If a valve has failed it must be re-
placed. A ball valve valve is illustrated in figure 6.
The ball valve is equipped with a service port. A
schrader valve is factory installed. A service port cap
is supplied to protect the schrader valve from con-
tamination and assure a leak free seal.
SUCTION LINE (BALL TYPE) SERVICE VALVE
(VALVE OPEN)
FIGURE 6
SCHRADER VALVE
SERVICE PORT
SERVICE PORT
CAP
STEM CAP
STEM
USE ADJUSTABLE WRENCH
ROTATE STEM CLOCKWISE 90- TO CLOSE
ROTATE STEM COUNTER-CLOCKWISE 90- TO OPEN
BALL
(SHOWN OPEN)
TO OUTDOOR COIL
TO INDOOR COIL
/($. 7(67,1*
After the line set has been connected to the indoor and
outdoor units, the line set connections and indoor unit
must be checked for leaks.
WARNING
Never use oxygen to pressurize refrigeration or air
conditioning system. Oxygen will explode on con-
tact with oil and could cause personal injury. When
using high pressure gas such as nitrogen or CO
2
for
this purpose, be sure to use a regulator that can
control the pressure down to 1 or 2 psig.
Using an Electronic Leak Detector or Halide
1-- Connect cylinder of HCFC-22 to center port of man-
ifold gauge set.
2-- With both manifold valves closed, open the valve
on the HCFC-22 bottle (vapor only).
3-- Open the high pressure side of the manifold to al-
low HCFC-22 into the line set and indoor unit.
Weigh in a trace amount of HCFC-22. (A trace
amount is a maximum of 2 ounces or 3 pounds
pressure.) Close the valve on the HCFC-22 bottle
and the valve on the high pressure side of the man-
ifold gauge set. Disconnect HCFC-22 bottle.
4-- Connect a cylinder of nitrogen with a pressure reg-
ulating valve to the center port of the manifold
gauge set.