Lennox HSXA19 SERIES, HSXA19-038, HSXA19-036, HSXA19-024, HSXA19 048 Installation Instructions Manual
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504,919M
*P504919M*
04/04
*2P0404*
©2004 Lennox Industries Inc.
Dallas, Texas
HSXA19 Outdoor Unit
Two−stage HSXA19 outdoor units use R410A which is an
ozone friendly HFC refrigerant. This unit must be installed
with a matching indoor coil and line set as outlined in the
Lennox Engineering Handbook. Dave Lennox Signature
Collection HSXA19 outdoor units are designed for use in expansion valve systems (TXV) only. They are not designed to
be used with other refrigerant flow control devices. The Lennox Engineering Handbook lists a TXV kit that must be ordered separately.
Shipping & Packing List
1 − Assembled HSXA19 outdoor unit
2 − Grommets (liquid and vapor line)
1 − Bushing (for low voltage wiring)
Check equipment for shipping damage. If you find any
damage, immediately contact the last carrier.
CAUTION
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental
contact with sharp edges.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal injury or loss of life. Installation and service must
be performed by a qualified installer or service
agency.
IMPORTANT
This unit must be matched with an indoor coil as
specified in Lennox’ Engineering Handbook. Coils
previously charged with HCFC−22 must be flushed.
INSTALLATION
INSTRUCTIONS
HSXA19 SERIES UNITS
CONDENSING UNITS
504,919M
04/04
Supersedes 03/04
Table of Contents
HSXA19 Outdoor Unit 1. . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping & Packing List 1. . . . . . . . . . . . . . . . . . . . . . . . .
General Information 1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Arrangement 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting The Unit 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Piping 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Metering Device 11. . . . . . . . . . . . . . . . . . . .
Flushing Existing Line Set & Indoor Coil 11. . . . . . . . . .
Manifold Gauge Set 13. . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Valves 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leak Testing 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evacuation 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start−Up 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Operation 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 23. . . . . . . . . . . . . . . . . . . . . . . . . .
Homeowner Information 23. . . . . . . . . . . . . . . . . . . . . . . .
Check Points 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Retain These Instructions
For Future Reference
General Information
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
who have jurisdiction before installation.
WARNING
This product and/or the indoor unit it is matched with
may contain fiberglass wool.
Disturbing the insulation during installation, maintenance, or repair will expose you to fiberglass wool
dust. Breathing this may cause lung cancer. (Fiberglass wool is known to the State of California to
cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact your
supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900
Litho U.S.A.
Page 2
Unit Dimensions – Inches (mm)
ELECTRICAL
INLETS
SUCTION LINE
INLET
LIQUID
LINE INLET
DISCHARGE AIR
INLET
AIR
COMPRESSOR
B
TOP VIEW
4-1/2 (114)
2-3/4 (70)
4
A
4
2-9/16
(65)
AIRINLET
AIRINLET
3-1/8
(79)
3-1/8
(79)
3-1/8
(79)
32-1/8 (816) 34-1/16 (865)
18-5/8
(473)
9-1/8
(232)
9-1/8
(232)
Model No.
A B
HSXA19-024
in. 30-7/8 32-1/8
HSXA19-036
mm 784 816
in. 44−7/8 32−1/8
HSXA19-038
mm 1140 816
in. 34-7/8 13−3/4
HSXA19-048
mm 886 349
in. 40-7/8 19−3/4
HSXA19-060
mm 1038 502
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Parts Arrangement
Figure 1
outdoor fan
(variable speed
on HSXA19−038)
run capacitor
contactor
vapor valve and
gauge port
compressor terminal plug
discharge line
vapor line
two−stage compressor
system
operation monitor
low pressure switch
high pressure switch
filter drier
start capacitor
(HSXA19−024)
Setting the Unit
CAUTION
In order to avoid injury, take proper precaution when
lifting heavy objects.
Refer to unit dimensions for sizing mounting slab, platforms or supports. Refer to figure 2 for installation clearances.
30"
(762 mm)
as noted
Installation Clearances
Figure 2
NOTE − A service access
clearance of 30" (762 mm)
must be maintained in front
of the service access panel.
Clearance to one side must
be 36" (914 mm). Clearance
to one of the remaining two
sides may be 12" (304 mm)
and the final side may be 6"
(152 mm).
NOTE − A clearance of 24" (610 mm)
must be maintained between two units.
NOTE − 48" (1219 mm) clearance required on top
of unit. Maximum soffit overhang is 36" (914 mm).
as
noted
as
noted
A − Slab Mounting
When you install the unit at grade level, the top of the slab
should be high enough above the grade so that water from
higher ground will not collect around the unit. See figure 3.
Slab should have a slope tolerance away from the building
of 2 degrees or 2 inches per 5 feet (51 mm per 1.5 m). Refer
to the next section (roof mounting) for barrier construction if
the unit must face prevailing winter winds.
2 degrees or
2 in. per 5 foot
(51 mm per 1.5 m)
slope tolerance away
from building structure
Slab Mounting
ground level
mounting
slab
building
structure
discharge air
Figure 3
Page 4
B − Roof Mounting
Install unit at a minimum of 4 inches above surface of the
roof. Care must be taken to ensure weight of unit is properly
distributed over roof joists and rafters. Either redwood or
steel supports are recommended.
Electrical
In the U.S.A., wiring must conform with current local codes
and the current National Electric Code (NEC). In Canada,
wiring must conform with current local codes and the current
Canadian Electrical Code (CEC).
Refer to the furnace or blower coil installation instructions
for additional wiring application diagrams and refer to unit
nameplate for minimum circuit ampacity and maximum
overcurrent protection size.
WARNING
Electric shock hazard.
May cause injury or death.
Line voltage is present at all components when unit is not in operation on
units with single pole contactors.
Disconnect all remote electric power
supplies before opening this panel.
Unit may have multiple power supplies.
WARNING
Unit must be grounded in accordance with national
and local codes. Electric Shock Hazard. Can cause
injury or death.
1 − Install line voltage power supply to unit from a properly
sized disconnect switch.
2 − Ground unit at unit disconnect switch or to an earth
ground.
NOTE − Connect conduit to the unit using a proper
conduit fitting.
NOTE − Units are approved for use only with copper
conductors.
24V, Class II circuit connections are made in the low
voltage junction box. Refer to appropriate figure for
field wiring. See figure 4 for field wiring. See figures 5
and 6 for typical wiring.
NOTE − A complete unit wiring diagram is located in
side the unit control box cover.
3 − Install room thermostat (ordered separately) on an in-
side wall approximately in the center of the conditioned
area and 5 feet (1.5 m) from the floor. It should not be
installed on an outside wall or where it can be affected
by sunlight, drafts or vibrations.
4 − Install low voltage wiring from outdoor to indoor unit
and from thermostat to indoor unit.
HSXA19 Outdoor Unit
Field Wiring Diagram
Figure 4
24V
variable speed
motor on −038
model only
208/230/60/1
SYSTEM
OPERATION
MONITOR
L2
L1
*
*−024 Unit
*
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HSXA19−024, −036, −048, and −060 Wiring Diagram
Figure 5
Page 6
HSXA19−038 Wiring Diagram
Figure 6
Page 7
Refrigerant Piping
If the HSXA19 unit is being installed with a new indoor coil
and line set, the plumbing connections should be made as
outlined in this section. If an existing line set and/or indoor
coil is going to be used to complete the HSXA19 system,
refer to the following section which 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, nonflare) series line sets as shown in table 1 or use field-fabricated refrigerant lines. Valve sizes are listed in table 1.
Table 1
Refrigerant Line Sets
HSXA
Valve Size
Connections
Recommended Line Set
19
Liquid
Line
Vapor
Line
Liquid
Line
Vapor
Line
L15
Line Sets
−024
−036
3/8 in.
(10 mm)
7/8 in.
(22 mm)
3/8 in.
(10 mm)
7/8 in.
(19 mm)
L15−65
15 ft. − 50 ft.
(4.6 m − 15 m)
−038
3/8 in.
(10 mm)
7/8 in.
(22 mm)
3/8 in.
(10 mm)
7/8 in.
(22 mm)
L15−65
15 ft. − 50 ft.
(4.6 m − 15 m)
−048
3/8 in.
(10 mm)
7/8 in.
(22 mm)
3/8 in.
(10 mm)
7/8 in.
(22 mm)
L15−65
15 ft. − 50 ft.
(4.6 m − 15 m)
−060
3/8 in.
(10 mm)
1−1/8 in.
(29 mm)
3/8 in.
(10 mm)
1−1/8 in.
(29 mm)
Field
Fabricated
NOTE − Units are designed for line sets of up to fifty feet
(15 m).
Refrigerant Piping Connections
HSXA19 Matched with New Indoor Coil and Line Set
If an existing indoor coil that was equipped with an
RFCI metering device is being replaced, the liquid line
must also be replaced prior to the installation of the
HSXA19 unit.
If refrigerant lines are routed through a wall, seal and isolate
the opening so vibration is not transmitted to the building.
Installing Refrigerant Line
During the installation of any heat pump or a/c system, it is
important to properly isolate the refrigerant lines to prevent
unnecessary vibration. Line set contact with the structure
(wall, ceiling or floor) causes some objectionable noise
when vibration is translated into sound. As a result, more
energy or vibration can be expected. Closer attention to
line set isolation must be observed.
Following are some points to consider when placing and
installing a high−efficiency outdoor unit:
1- Placement − Be aware some localities are adopting
sound ordinances based on how noisy the unit is at the
neighbors’ home, not at the original installation. Install
the unit as far as possible from the property line. When
possible, do not install the unit directly outside a bedroom window. Glass has a very high level of sound transmission.
2- Line Set Isolation − The following illustrations demon-
strate procedures which ensure proper refrigerant line
set isolation. Figure 7 shows how to install line sets on
vertical runs. Figure 8 shows how to install line sets on
horizontal runs. Figure 9 shows how to make a transition
from horizontal to vertical. Finally, figure 10 shows how
to place the outdoor unit and line set.
Page 8
Refrigerant Line Sets
How To Install Vertical Runs
(new construction shown)
PVC Pipe
Fiber Glass
Insulation
Caulk
Outside Wall
Vapor Line
(wrapped with Armaflex)
Liquid Line
IMPORTANT - Refrigerant
lines must not contact
structure.
Outside Wall
Inside Wall
Liquid LineVapor Line
IMPORTANT - Refrigerant
lines must not contact wall.
Wood Block
Between Studs
Strap
Sleeve
Wood Block
Strap
Sleeve
Wire Tie
Wire Tie
Wire Tie
NOTE - Similar installation practices should be used if
line set is to be installed on exterior of outside wall.
Figure 7
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