Charging - Lennox 13HPX Series Unit Information

3 − Replace stem cap. Tighten finger tight, then tighten an
additional 1/6 turn.
LIQUID LINE SERVICE VALVE (VALVE OPEN)
INSERT HEX
WRENCH HERE
SERVICE
PORT
TO COMPRESSOR
SERVICE
PORT
CAP
SCHRADER
VALVE
LIQUID LINE SERVICE VALVE (VALVE CLOSED)
RETAINING RING
SERVICE
PORT
TO
COMPRESSOR
SERVICE
PORT
CAP
SCHRADER VALVE OPEN
TO LINE SET WHEN VALVE IS
CLOSED (FRONT SEATED)
FIGURE 12
Vapor Line (Ball Type) Service Valve
A ball-type full service valve is used on 13HPX. Valves
are not re−buildable. If a valve has failed it must be replaced. A
ball valve is illustrated in figure 13.
The ball valve is equipped with a service port. A Schrader
valve is factory installed. A service port cap is supplied to pro-
tect the Schrader valve from contamination and assure a
leak free seal.
STEM CAP
TO INDOOR COIL
STEM CAP
INSERT HEX
WRENCH HERE
TO INDOOR COIL
VALVE FRONT
SEATED
SUCTION LINE (BALL TYPE) SERVICE VALVE
(VALVE OPEN)
USE ADJUSTABLE WRENCH
ROTATE STEM CLOCKWISE 90_ TO CLOSE
ROTATE STEM COUNTER-CLOCKWISE 90_ TO OPEN
TO COMPRESSOR
SERVICE
PORT
CAP
III − CHARGING
A − Pumping Down System
Deep vacuum operation (operating compressor
at 0 psig or lower) can cause internal fusite
arcing resulting in a damaged or failed
compressor. This type of damage will result in
denial of warranty claim.
The system may be pumped down when leak checking the
line set and indoor coil or making repairs to the line set or
indoor coil.
1− Attach gauge manifold.
2− Front seat (close) liquid line valve.
3− Start outdoor unit.
4− Monitor suction gauge. Stop unit when 0 psig is reached.
5− Front seat (close) suction line valve.
B − Leak Testing (To Be Done
Before Evacuating)
1− Attach gauge manifold and connect a drum of dry nitro-
gen to center port of gauge manifold.
2− Open high pressure valve on gauge manifold and
pressurize line set and indoor coil to 150 psig (1034
kPa).
3− Check lines and connections for leaks.
Page 10
STEM CAP
STEM
BALL
(SHOWN OPEN)
FROM INDOOR COIL
SERVICE PORT
SCHRADER CORE
FIGURE 13
CAUTION