Lennox 14HPX-018 Installation Instructions Manual page 5

Z_ NOTE-
FOR USE WITH COPPER CONDUCTORS
ONLY.REFER TO UNIT RATIN6
PLATE FOR MINIMUM CIRCUIT
ANPACITY AND MAXIMUM OVER-
CURRENT PROTECTION SIZE
Z_ REFER TO COMPRESSOR IN UNIT
FOR ACTUAL TERMINAL ARRANGEMENT.
/_ WARNING-
ELECTRIC SHOCK HAZARD,CAN CAUSE INJURY
OR DEATH.UNIT MUST BE GREED IN
ACCO_OANCE WITH NATIONAL AND LOCAL CODES.
RTI4 SENSOR, OUTDOOR TEMP (OPTIONAL)
£,87 LOV! LI
PRESSURE REVERSIND
SWITCH VALVE
C_WPBESSO_
CORTACTOR
EQUIPMENT
6ROUND
COMPRESSOR
CONTACTOR
L2_ )--C)
S,€
HI6H
PRESSURE
SWITCH
Q
RTI5
AMBIENT
SENSOR
0
RT2 I
DEFROST
COIL
SENSOR
@
CI2
CAPACITOR
O OUT
AI_
DEFROST CONTROL
;OIL
_MB
)IS
OUT
O PS
2 OUT
KI
COMPRESSOR
CONTACTOR
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c
c
c
c
c
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SIGNATURE
81M2B
TWlSTEO
RTI4
m'
GROUNDz_
208-
mL2 230/
60/_
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_GENDTES OPTIONAL COMPONENTS
_LINE VOLTAGE FIELD INSTALLED
-- -- --CLASS II VOLTAGE FIELD INSTALLED
Figure 6. Typical Field Wiring Diagram
Table 2. Refrigerant Line Sets
If the 14HPX unit is being installed with a new indoor coil
and line set, plumbing connections should be made as out-
lined in this section. If an existing line set and/or indoor coil
is going to be used to complete the 14HPX system, refer to
the following section that includes flushing procedures.
Field refrigerant piping consists of liquid and vapor lines
from the outdoor unit (sweat connections) to the indoor coil
(flare or sweat connections).
Use Lennox L15 (sweat, non-flare) series line sets as
shown in table 2 or use field4abricated refrigerant lines.
Refer to Refrigerant Piping Guide (Corp. 9351-L9) for
proper size, type, and application of field4abricated lines.
Valve sizes are also listed in table 2.
PLUMBING CONNECTIONS--14HPX MATCHED
WITH NEW INDOOR COIL AND LINE SET
If replacing an existing coil that is equipped with a liquid line
functioning as a metering orifice, replace the liquid line
prior to installing the 14HPX unit. See table 2.
Field
Mod- Connections
el Liquid Vapor
Line Line
-018 3/8in. 3/4in
-024
(10 mm) (19 mm)
-030
-036 3/8 in. 7/8 in
-042 (10 ram) (22 ram)
-048
-060 3/8 in. 1-1/8 in,
(10 mm) (29 mm)
Recommended Line Set
Liquid Vapor L15
Line Line Line Sets
3/8 in. 3/4 in L15-41
(10mm) (19mm) 15 ft. - 50 ft.
(4.6 m - 15 m)
3/8 in, 7/8 in L15-65
(10mm) (22mm) 15 ft, - 50 ft.
(4.6 m- 15 m)
3/8 in. 1-1/8 in, Field
(10 mm) (29 mm) Fabricated
NOTE - Units are designed for line sets of up to fifty feet (15
m); for longer lengths, consult the Lennox Refrigerant Pip-
ing Guide (Corp. 9351-L9). Select line set diameters from
table 2 to ensure that oil returns to the compressor.
Page 5
14HPX SERIES