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©2015 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
WARNING
The State of California has determined that this product
may contain or produce a chemical or chemicals, in very
low doses, which may cause serious illness or death. It
may also cause cancer, birth defects, or reproductive
harm.
GENERAL
This TPA* S4 outdoor heat pump is designed for use with
HFC-410A refrigerant only. This unit must be installed with
an approved indoor air handler or coil. See the Lennox TPA*
S4 Product Specifications bulletin for approved indoor
component match ups.
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
STEP 1 -- SETTING THE UNIT -- CLEARANCES
See NOTES
See
NOTES
See NOTES
NOTICE: Specific applications may require adjustment of the listed installation clearances to provide protection for
the unit from physical damage or to avoid conditions which limit operating efficiency. (Example: Clearances may
have to be increased to prevent snow or ice from falling on the top of the unit. Additional clearances may also be
required to prevent air recirculation when the unit is installed under a deck or in another tight space.)
NOTES -
Service clearance of 30 in. (762 mm) must be maintained on one
of the sides adjacent to the control box.
Clearance to one of the other three sides must be 36 in. (914 mm).
Clearance to one of the remaining two sides may be 12 in. (305
See
mm) and the final side may be 6 in. (152 mm).
NOTES
A clearance of 24 in. must be maintained between two units.
CONTROL
48-in. (1219 mm) clearance required on top of unit.
BOX
INSTALLATION
INSTRUCTIONS
™
T-Class
G and Y Voltages
HEAT PUMP
507382-01
10/2015
Supersedes 8/2015
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
HVAC professional installer (or equivalent) or a service
agency.
Before attempting to perform any service or maintenance,
turn the electrical power to unit OFF at disconnect switch.
For more in-depth information, consult the Installa
tion and Service Procedures manual, available on
DaveNet or through the Technical Support depart
ment at 800-453-6669.
FIGURE 1
Page 1
TPA* S4 Units
WARNING
CAUTION
NOTICE !
Litho U.S.A.
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Related Manuals for Lennox TPA S4 Series
Summary of Contents for Lennox TPA S4 Series
- Page 1 This TPA* S4 outdoor heat pump is designed for use with HFC-410A refrigerant only. This unit must be installed with an approved indoor air handler or coil. See the Lennox TPA* NOTICE ! S4 Product Specifications bulletin for approved indoor component match ups.
- Page 2 IMPORTANT ! UNIT DIMENSIONS - INCHES (MM) This model is designed for use in check / expansion valve systems only. An indoor expansion valve ap proved for use with HFC-410A refrigerant must be or dered separately and installed prior to operating the system.
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Page 3: Step 2 -- Refrigerant Piping
Take (6.9 to 13.8 kPa). care to empty all existing traps. Polyol ester (POE) oils are used in Lennox units charged with HFC-410A refrigerant. Residual mineral oil can act as an insula WARNING tor, preventing proper heat transfer. - Page 4 STEP 2 -- REFRIGERANT PIPING -- Continued TYPICAL EXISTING EXPANSION VALVE REMOVAL TYPICAL EXISTING FIXED ORIFICE PROCEDURE (UNCASED COIL SHOWN) REMOVAL PROCEDURE (UNCASED COIL SHOWN) STUB END TWO-PIECE PATCH PLATE LIQUID LINE CHECK DISTRIBUTOR TUBES (UNCASED COIL ONLY) ORIFICE EXPANSION LIQUID LINE ORIFICE HOUSING HOUSING VALVE...
- Page 5 STEP 2 -- REFRIGERANT PIPING -- Brazing Procedures CUT AND DEBUR CAP AND CORE REMOVAL Cut ends of the refrigerant lines square (free from nicks or dents) Remove service cap and core from and debur the ends. The pipe must remain round. Do not crimp end both the vapor and liquid line service of the line.
- Page 6 WRAP SERVICE VALVES To help protect service valve seals during brazing, wrap water-saturated cloths around service valve bodies and copper tube stubs. Use additional water-saturated cloths underneath the valve body to protect the base paint. FLOW NITROGEN Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and out of the vapor valve stem port.
- Page 7 This outdoor unit is designed for use in systems that include an expansion valve metering device (purchased separately) at the indoor coil. See the Lennox TPA* S4 Product Specifications bulletin (EHB) for approved expansion valve kit match ups. The expansion valve unit can be installed internal or external to the indoor coil. In applications where an uncased coil is being installed in a field-provided plenum, install the expansion valve in a manner that will provide access for field servicing of the expansion valve.
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Page 8: Step 3 -- Leak Test And Evacuation
STEP 3 -- LEAK TEST AND EVACUATION LEAK TEST HIGH MANIFOLD GAUGE SET TO VAPOR SERVICE VALVE (ANGLE- OR BALL-TYPE) NITROGEN OUTDOOR UNIT HFC-410A CONNECT GAUGE SET A. Connect the high pressure hose of an HFC-410A manifold gauge set to the vapor valve service port. NOTE - Normally, the high pressure hose is connected to the liquid line port. - Page 9 STEP 3 -- LEAK TEST AND EVACUATION (Continued) EVACUATION HIGH CONNECT GAUGE SET NOTE - Remove cores from service valves (if not already done). Connect low side of manifold gauge set with 1/4 SAE in-line tee to vapor line service valve Connect high side of manifold gauge set to liquid line service valve MANIFOLD...
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Page 10: Install Thermostat
STEP 4 -- ELECTRICAL -- Circuit Sizing and Wire Routing In the U.S.A., wiring must conform with current local codes and WARNING the current National Electric Code (NEC). In Canada, wiring must conform with current local codes and the current Fire Hazard. -
Page 11: Typical Control Wiring
STEP 4 -- ELECTRICAL (Continued) -- High Voltage and Field Control Wiring The following illustration provides an example of control wiring connections when using a standard thermostat. ROUTING HIGH VOLTAGE, GROUND AND CONTROL WIRING HIGH VOLTAGE / GROUND WIRES Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring. To facilitate a conduit, a cutout is located in the bottom of the control panel. - Page 12 Torque Requirements OPERATING ANGLE-TYPE SERVICE VALVE When servicing or repairing heating, ventilating and air conditioning components, ensure the fasteners are 1. Remove stem cap with an appropriately sized wrench. appropriately tightened. Table 2 lists torque values for 2. Use a service wrench with a hex-head extension (3/16” for liquid line valve sizes and 5/16”...
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Page 13: Checking Refrigerant Charge
Compressor Delay (P5) Checking Refrigerant Charge The defrost control has a field-selectable function to reduce The TPA* S4 unit is factory-charged with enough HFC-410A occasional sounds that may occur while the unit is cycling in refrigerant to accommodate a 15-foot length of refrigerant and out of the defrost mode. -
Page 14: Owner's Information
Check the indoor unit filter each month and replace the No power to control filter, if necessary. Normal operation / Have your Lennox dealer show you where your indoor unit Simultaneous Slow FLASH power to control filter is located. It will be either at the indoor unit (installed Anti‐short cycle... - Page 15 Thermostat Operation 6. Inspect contactor contacts for pitting or burn marks. Replace as necessary. See the thermostat owner's manual for instructions on how to operate your thermostat. 7. Check outdoor fan motor for worn bearings/bushings. Pre-Service Check Replace as necessary. If your system fails to operate, check the following before 8.
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Page 16: Start Up Checks
TPA* S4 Start-Up and Performance Checklist Customer Address Indoor Unit Model Serial Outdoor Unit Model Serial Notes: START UP CHECKS Refrigerant Type: Rated Load Amps: Actual Amps Rated Volts Actual Volts Condenser Fan Full Load Amps Actual Amps: COOLING MODE Suction Pressure: Liquid Pressure: Supply Air Temperature:...
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