Page 8
I−Condenser Fan Motor
All units use single−phase PSC fan motors which require a
run capacitor. The FAN" side of the dual capacitor is used
for this purpose. The specifications tables on page 1 and 2
of this manual show the specifications of outdoor fans used
in HS26s. In all units, the outdoor fan is controlled by the
compressor contactor. See figure 9 if condenser fan motor
replacement is necessary.
FIGURE 9
"A" SEE TABLE 5
FAN
GUARD
Condenser fan
and motor
Wiring
Drip loop
TABLE 5
HS26 UNIT
"A" DIM.
+ 1/8"
Fan Blade Ven
dor
018 024 261
7/8"
Lau
−018, −024, −261,
7/8"
Revcor
−030, −311, −036,
1 1/16"
Lau
030, 311, 036,
−411, −042, −461
1−1/16"
Revcor
048
1−3/4"
Lau
−048
1−1/2"
Revcor
060
1 3/16"
Lau
−060
1−3/16"
Revcor
IV−REFRIGERANT SYSTEM
A−Plumbing
Field refrigerant piping consists of liquid and suction lines
from the outdoor unit (sweat connections). Use Lennox
L10 or L15 series line sets as shown in table 6 or 7 for field−
fabricated refrigerant lines. Refer to the piping section of
the Lennox Service Unit Information Manual (SUI−803−L9)
for proper size, type and application of field−fabricated
lines.
Separate discharge and suction service ports are provided
at the compressor for connection of gauge manifold during
charging procedure.
TABLE 6 (Early Models)
HS26
UNIT
LIQUID
LINE
SUCTION
LINE
L10 LINE
SET
L15 LINE
SET
−261, −311,
−411
3/8 in.
(10 MM)
3/4 in.
(19 mm)
L10−41
20ft. − 50 ft.
(6m − 15 m)
L15 − 41
20 ft. − 50 ft.
(6 m − 15 m)
−461
3/8 in.
(10 MM)
1−1/8 in.
(29 m)
Field
Fabricated
Field
Fabricated
−511
3/8 in.
(10 MM)
7/8 in.
(22 m)
L10−65
30 ft. − 50 ft.
(9 m − 15m)
L15−65
30 ft. − 50 ft.
(9 m − 15m)
−651
3/8 in.
(10 MM)
1−1/8 in.
(29 m)
Field
Fabricated
Field
Fabricated
TABLE 7 (Late Models)
HS26
UNIT
LIQUID
LINE
SUCTION
LINE
L10 LINE
SET
L15 LINE
SET
−018
3/8 in.
(10 mm)
5/8 in.
(16 mm)
L10−26
20ft. − 50 ft.
(6m − 15 m)
L15 − 26
20 ft. − 50 ft.
(6 m − 15 m)
−024 −030
−036
3/8 in.
(10 mm)
3/4 in.
(19 mm)
L10−41
20 ft. − 50 ft.
(6m − 15 m)
L15−41
20 ft. − 50 ft.
(6m − 15m)
−042 −048
3/8 in.
(10 mm)
7/8 in.
(22 m)
L10−65
30 ft. − 50 ft.
(9 m − 15m)
L15−65
30 ft. − 50 ft.
(9 m − 15m)
−060
3/8 in.
(10 mm)
1−1/8 in.
(29 m)
Field
Fabricated
Field
Fabricated
KNIFE EDGE SEAL
STEM CAP
SERVICE
PORT
CAP
TO LINE
SET
TO
CONDENSER
COIL
LIQUID LINE SERVICE VALVE
IMPORTANT
A schrader valve is not provided on the liquid line
service port. Valve must be backseated to turn off
pressure to service port.
FIGURE 10
VALVE STEM
USE SERVICE
WRENCH
(PART #18P66,
54B64 or 12P95)
SERVICE PORT OPEN TO
LINE SET WHEN FRONT
SEATED AND CLOSED
(OFF) WHEN BACK
SEATED
NO SCHRADER
B−Service Valves (Early Models)
The liquid line and suction line service valves and gauge
ports are accessible by removing the compressor access
cover. Full service liquid and suction line valves are
used.The service ports are used for leak testing, evacuat
ing, charging and checking charge.
1 − Liquid Line Service Valve
A fullservice liquid line valve made by one of several
manufacturers may be used. All liquid line service valves
function the same way, differences are in construction.
Valves are not rebuildable. If a valve has failed it must be
replaced. The liquid line service valve is illustrated in figure
10.
