Lennox Diplomat 10HP12 Information page 10

VAPOR LINE SERVICE VALVE (VALVE OPEN)
INSERT HEX WRENCH
HERE (PART #49A71 AND
SERVICE WRENCH)
INLET
(FROM INDOOR COIL)
SCHRADER VALVE
SERVICE PORT
CAP
SERVICE PORT
To Open Vapor Line Service Valve:
1 – Remove stem cap with an adjustable wrench.
2 – Using service wrench and 5/16" hex head
extension (part #49A71) back the stem out
counterclockwise until the valve stem just touches
the retaining ring.
DANGER
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.
3 – Replace stem cap tighten firmly. Tighten finger
tight, then tighten an additional 1/6 turn.
To Close Vapor Line Service Valve:
1 – Remove stem cap with an adjustable wrench.
TABLE 6
LINE SET SPECIFICATIONS
Condensing Line
Unit Set Vapor & Liq.
Model No. Model No.
*
10HP12 Not Available
L10–21–20
10HP18
L10–21–25
L10–21–35
10HP24
L10–21–50
L10–41–20
10HP30
L10–41–30
L10–41–40
10HP36
L10–41–50
L10–65–30
10HP42
L10–65–40
10HP48
L10–65–50
*
10HP60 Not Available
*Field Fabricate
**3/8" x 1/4" reducer furnished to adapt unit to 1/4 field fabricated line set.
*** 3/8" x 5/16" reducer furnished to adapt unit to 5/16" line set.
SNAP RING
KNIFE EDGE SEAL
STEM CAP
OUTLET
(TO COMPRESSOR)
Length of Liquid Vapor
Line Line
Lines (ft.) (o.d. ft.) (o.d. ft.)
**1/4
1/2
20 5/8
***5/16
25 ***5/16 5/8
35 ***5/16
5/8
50
***5/16 5/8
20
3/8 3/4
30 3/8 3/4
40 3/8
3/4
3/8
50 3/4
30
3/8 7/8
40 3/8 7/8
50 3/8
7/8
3/8 1–1/8
VAPOR LINE SERVICE VALVE (VALVE CLOSED)
KNIFE EDGE SEAL
INLET
(FROM INDOOR COIL)
SERVICE PORT
SERVICE PORT CAP
SCHRADER VALVE OPEN
TO LINE SET WHEN
VALVE IS CLOSED
(FRONT SEATED)
FIGURE 19
2 – Using service wrench and 5/16" hex head
extension (part #49A71) turn stem in clockwise to
seat the valve. Tighten firmly.
3 – Replace stem cap. Tighten finger tight, then
tighten an additional 1/6 turn.
B – Plumbing
See figures 20 and 21 for unit refrigerant components.
Field refrigerant piping consists of liquid and vapor
lines from the outdoor unit (sweat connections). Use
Lennox L10 series line sets as shown in table 6 or field
fabricated refrigerant lines.
IV – CHARGING
Units manufactured before September 1, 1992
have a sufficient charge for a 25ft. line set. Units
manufactured after September 1, 1992 have
sufficient charge for a 20ft. line set. Refer to unit
nameplate for factory supplied charge.
Unit charge is based on a matching indoor coil and
outdoor coil with a 20 foot (6096 mm) line set. For varying
lengths of line set, refer to table 7.
Liquid Line
Set Diameter
1/4 in. (6 mm)
5/16 in. (8mm)
3/8 in. (10 mm)
*If line set is greater than 20 ft. (6.10m) add this amount. If line set is less
than 20 ft. (6.10m) subtract this amount
Page 10
SNAP RING
INSERT
HEX WRENCH HERE
(PART #49A71 AND
SERVICE
WRENCH)
(VALVE
FRONT SEATED)
OUTLET
(TO COMPRESSOR)
IMPORTANT
TABLE 7
Ounce per 5 foot (ml per mm)
adjust from 20 ft. (6096mm)*
1 ounce per 5 feet (30 ml per 1524 mm)
2 ounce per 5 feet (60 ml per 1524 mm)
3 ounce per 5 feet (90 ml per 1524 mm)
STEM
CAP