Lennox 13ACC Series User Manual

Page 6
II − REFRIGERANT SYSTEM
A − Plumbing
Field refrigerant piping consists of liquid and suction lines
from the condensing unit (sweat connections) to the indoor
evaporator coil (flare or sweat connections). Use Lennox
L15 (sweat) series line sets as shown in table 1.
TABLE 1
Condensing
Unit
Line Set
Model No.
(L10 or
Length of
Lines
Liquid Line
Outside Dia.
Suction Line
Outside Dia.
Unit
Model No.
(L10 or
L15)
ft. m in. mm in. mm
L154120 20 6
13ACC024
13ACC030
L154130 30 9
3/8
95
3/4
19
13ACC030
L154140 40 12
3/8 9.5 3/4 19
L154150 50 15
13ACC036
L156530 30 9
13ACC036
13ACC037
13ACC042
L156540 40 12
3/8 9.5 7/8 22.2
13ACC042
13ACC048
L156550 50 15
13ACC047
13ACC060
*Notavailable 3/8 9.5 11/8 28.5
*Field fabricate.
The liquid and suction line service valves (figures 9 and 10)
and gauge ports are accessible from outside the unit.
The valve is equipped with a service port. The service ports
are used for leak testing, evacuating, charging and checking
charge. A schrader valve is factory installed. A service port cap
is supplied to protect the schrader valve from contamination
and serve as the primary leak seal.
NOTEAlways keep valve stem caps clean.
To Access Schrader Port:
1 − Remove service port cap with an adjustable wrench.
2 − Connect gauge to the service port.
3 − When testing is completed, replace service port cap.
Tighten finger tight, then an additional 1/6 turn.
To Open Liquid or Suction Line Service Valve:
1 − Remove stem cap with an adjustable wrench.
2 − Using service wrench and 5/16" hex head extension
back the stem out counterclockwise until the valve stem
just touches the retaining ring.
3 − Replace stem cap and tighten finger tight, then tighten
an additional 1/6 turn.
Do not attempt to backseat this valve. Attempts to
backseat this valve will cause snap ring to explode
from valve body under pressure of refrigerant.
Personal injury and unit damage will result.
DANGER
To Close Liquid or Suction Line Service Valve:
1 − Remove stem cap with an adjustable wrench.
2 − Using service wrench and 5/16" hex head extension, turn
stem clockwise to seat the valve. Tighten firmly.
3 − Replace stem cap. Tighten finger tight, then tighten an
additional 1/6 turn.
FIGURE 9
LIQUID LINE SERVICE VALVE (VALVE OPEN)
SCHRADER
VALVE
SERVICE
PORT
SERVICE
PORT
CAP
INSERT HEX
WRENCH HERE
INLET
(TO INDOOR COIL)
OUTLET
(TO COMPRESSOR)
STEM CAP
SCHRADER VALVE OPEN
TO LINE SET WHEN VALVE IS
CLOSED (FRONT SEATED)
SERVICE
PORT
SERVICE
PORT CAP
RETAINING RING
STEM CAP
OUTLET
(TO COMPRESSOR)
INSERT HEX
WRENCH HERE
LIQUID LINE SERVICE VALVE (VALVE CLOSED)
(VALVE FRONT
SEATED)
INLET
(TO INDOOR COIL)

Lennox 13ACC Series Specifications

General

Brand	Lennox
Model	13ACC Series
Category	Air Handlers
Language	English