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2001 Lennox Industries Inc.
Dallas, Texas
HSXA15 Outdoor Unit
HSXA15 outdoor units use R410A which is an ozone friend-
ly HFC refrigerant. This unit must be installed with a match-
ing indoor coil and line set as outlined in the Lennox Engi-
neering Handbook. HSXA15 outdoor units are designed for
use in expansion valve systems only. They are not designed
to be used with other refrigerant flow control devices. An ex-
pansion valve and filter drier approved for use with R410A
have been shipped with the unit. These components must
be installed prior to unit operation. Failure to install the
provided filter drier will void the warranty.
Shipping & Packing List
1 − Assembled HSXA15 outdoor unit
1 − Filter/Drier (approved for use with R410A systems)
1 − Expansion valve (approved for use with R410A)
2 − Grommets (for liquid and suction lines)
1 − Bushing (for low voltage wiring)
Check equipment for shipping damage. If you find any
damage, immediately contact the last carrier.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person-
al 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.
02/04
*2P0204*
INSTALLATION
INSTRUCTIONS
HSXA15 SERIES UNITS
CONDENSING UNITS
504,668M
02/04
Supersedes 12/02
Table of Contents
Shipping & Packing List
General Information
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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.
This product and/or the indoor unit it is matched with
may contain fiberglass wool.
Disturbing the insulation during installation, mainte-
nance, or repair will expose you to fiberglass wool
dust. Breathing this may cause lung cancer. (Fiber-
glass 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
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WARNING
504,668M
*P504668M*
Litho U.S.A.
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Related Manuals for Lennox HSXA15 SERIES
Summary of Contents for Lennox HSXA15 SERIES
-
Page 1: Table Of Contents
........ing indoor coil and line set as outlined in the Lennox Engi- Evacuation . -
Page 2: Hsxa15 Outdoor Unit
Unit Dimensions – Inches (mm) INLET INLET HSXA15 COMPRESSOR Outdoor Unit INLET ELECTRICAL TOP VIEW INLETS VAPOR LINE DISCHARGE INLET 4-1/2 (114) LIQUID LINE INLET 2-9/16 (65) 2-3/4 (70) 4-7/8 (22) (102) (102) 1-3/8 6-1/16 (35) (51) (51) (154) ACCESS VIEW SIDE VIEW Model No. -
Page 3: Parts Arrangement
Parts Arrangement CONDENSER FAN (NOT SHOWN) GROUND LUG TOP OF CABINET RUN CAPACITOR CONTACTOR VAPOR VALVE COMPRESSOR POWER AND GAUGE PORT TERMINALS LIQUID LINE SERVICE VALVE AND GAUGE PORT COMPRESSOR LOW PRESSURE SWITCH HIGH PRESSURE SWITCH Figure 1 Setting the Unit Installation Clearances *36"... -
Page 4: Electrical
A − Slab Mounting Refer to the furnace or blower coil installation instructions for additional wiring application diagrams and refer to unit When you install the unit at grade level, the top of the slab nameplate for minimum circuit ampacity and maximum should be high enough above the grade so that water from overcurrent protection size. - Page 5 Outdoor Unit Field Wiring Diagra (LEADLESS) YELLOW Figure 4 Thermostat Designations Thermostat Indoor Unit NOTE − see unit wiring diagram for power supply connections. power Outdoor Unit heat Y1 Outdoor Unit cooling indoor blower C Outdoor Unit common NOTE − If the indoor unit is not equipped with blower relay. It must be field−provided and installed (P−8−3251 or equivalent). Figure 5 Page 5...
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Page 6: Refrigerant Piping
NOTE − Units are designed for line sets of up to fifty feet (15 m). Refrigerant Piping For applications longer than fifty feet, consult the Lennox Refrig- erant Piping Guide (Corp. 9351−L9). Select line set diameters If the HSXA15 unit is being installed with a new indoor coil from table 1 to ensure that oil returns to the compressor. - Page 7 Refrigerant Line Sets How To Install Vertical Runs (new construction shown) NOTE - Similar installation practices should be used if line set is to be installed on exterior of outside wall. IMPORTANT - Refrigerant Outside Wall Vapor Line Liquid Line lines must not contact wall.
- Page 8 Refrigerant Line Sets: Installing Horizontal Runs To hang line set from joist or rafter, use either metal strapping material Wire Tie or anchored heavy nylon wire ties. (around vapor line only) 8 feet Floor Joist or Roof Rafter Tape or Wire Tie 8 feet Strapping Material (around vapor line only) Metal Sleeve...
- Page 9 Refrigerant Line Sets: Transition From Vertical To Horizontal Automotive Anchored Heavy Muffler-Type Nylon Wire Tie Hanger Wall Wall Stud Stud Strap Liquid Line Strap Liquid Line To Vapor Line To Vapor Line Liquid Line Vapor Line Metal Vapor Line Wrapped in Metal Sleeve Liquid Line...
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Page 10: Flushing Existing Line Set & Indoor Coil
Take care to empty all existing traps. Polyol WARNING ester (POE) oils are used in Lennox units charged with R410A refrigerant. Residual mineral oil can act Polyol ester (POE) oils used with R410A refrigerant as an insulator, preventing proper heat transfer. - Page 11 por line valve. Disconnect all power to the existing out- 3 − Remove the existing refrigerant flow control orifice or door unit. Refer to gauges after shutdown to confirm thermal expansion valve before continuing with flush- that the valves are not allowing refrigerant to flow back ing procedures.
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Page 12: Manifold Gauge Set
Expansion valves equipped with either Chatleff or flare 2 − Remove service port cap with an adjustable wrench. type fittings are available from Lennox. Refer to the Engi- neering Handbook for expansion valves for use with specif- 3 − Connect gauge to the service port. -
Page 13: Leak Testing
To Open Service Valve: WARNING 1 − Remove stem cap with an adjustable wrench. 2 − Use a service wrench with a hex−head extension to Refrigerant can be harmful if it is inhaled. Refriger- back the stem out counterclockwise as far as pos- ant must be used and recovered responsibly. -
Page 14: Evacuation
IMPORTANT WARNING Leak detector must be capable of sensing HFC re- Danger of Equipment Damage. frigerant. Avoid deep vacuum operation. Do not use com- pressors to evacuate a system. Extremely low vacuums can cause internal arcing Evacuation and compressor failure. Damage caused by deep vacuum operation will Evacuating the system of noncondensables is critical for void warranty. -
Page 15: Charging
Measure the liquid line temperature and the outdoor ambi- Charging ent temperature as outlined below: This system is charged with R410A refrigerant which oper- 1 − Connect the manifold gauge set to the service valves: ates at much higher pressures than HCFC−22. The expan- low pressure gauge to vapor valve service port sion valve and liquid line filter drier provided with the unit high pressure gauge to liquid valve service port... - Page 16 listed indicate that the system is undercharged. Verify Table 4 pressures with the R410A refrigerant pressure chart in Approach Temperature Model Number table 6. Verify adjusted charge using the approach Liquid Line Temp. − Outdoor Ambient °F (°C) method. HSXA15−024 8 ±...
- Page 17 Table 6 R410A Temperature/Pressure Chart Temperature Pressure Temperature Pressure Temperature Pressure Temperature Pressure °F Psig °F Psig °F Psig °F Psig 100.8 178.5 290.8 445.9 102.9 181.6 295.1 451.8 105.0 184.3 299.4 457.6 107.1 187.7 303.8 463.5 109.2 190.9 308.2 469.5 111.4 194.1...
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Page 18: Maintenance
Indoor Coil must be installed to ensure a clean, moisture−free sys- 1 − Clean coil, if necessary. tem. A replacement filter drier is available as Lennox part 2 − Check connecting lines and coils for evidence of oil no. 37L5201.
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