Lennox 10ACC Series User Manual

Page 7
III - REFRIGERANT SYSTEM
A - Plumbing
Field refrigerant piping consists of liquid and suction lines
from the condensing unit (sweat connections) to theindoor
evaporator coil (flare or sweat connections). Use Lennox
L10 (flare) or L15 (sweat, non-flare) series line sets as
shown in table 1 or use field-fabricated refrigerant lines.
Separate discharge and suction service ports are pro-
vided outside the unit for connection of gauge manifold
during charging procedure.
TABLE 1
Model Liquid
Line
Suction
Line
L15
Line Sets
10ACC-018
10ACC-024
5/16 in*
(8 mm)
5/8 in
(16 mm)
L15-21
20 ft.- 50 ft.
(6m - 15m)
10ACC-030
10ACC-036
3/8 in
(10 mm)
3/4 in.
(19 mm)
L15-41
20 ft.- 50 ft.
(6m - 15m)
10ACC-042
10ACC-048
3/8 in
(10 mm)
7/8 in.
(22 mm)
L15-65
30 ft.- 50 ft.
(9m - 15m)
10ACC-060
3/8 in
(10 mm)
1-1/8 in.
(29 mm)
Field
Fabricated
*Field fabricate. See Corp. 9351-L9 Refrigerant Piping Nabual
B - Service Valves
The liquid and suction line service valves (figures 10 and 11)
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.Aschradervalveisfactoryinstalled. A service portcap
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 hex head extension (3/16 for
liquid line and 5/16 for suction line) back the stem out
counterclockwise until the valve stem just touches the
retaining ring.
3 - Replace stem captighten firmly. Tighten fingertight, 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 hex head extension (3/16 for
liquid line and 5/16 for suction line), turn stem clockwise
to seat the valve. Tighten firmly.
3 - Replace stem cap. Tighten finger tight, then tighten an
additional 1/6 turn.
FIGURE 10
LIQUID LINE SERVICE VALVE (VALVE OPEN)
SCHRADER
VALVE
SER-
VICE
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 10ACC Series Specifications

General

Brand	Lennox
Model	10ACC Series
Category	Heat Pump
Language	English