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Information Manual
E2011 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
WARNING
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
professional installer (or equivalent) or a service agency.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HFCs, and HCFCs) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incarceration
may be levied for noncompliance.
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.
NOTICE TO INSTALLER
UNIT PLACEMENT
It is critical for proper unit operation to place outdoor unit on an
elevated surface as described in Unit Placement section on page 8.
BRAZING LINE SET TO SERVICE VALVES
It is imperative to follow the brazing technique illustrated starting on
page 11 to avoid damaging the service valve's internal seals.
06/11
*2P0611*
INSTALLATION
INSTRUCTIONS
T−CLASSt TPA*S4 Units
G and Y Voltages
HEAT PUMP UNITS
506648−01
06/11
Supersedes 11/10
TABLE OF CONTENTS
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Shipping and Packing List
Check the unit components for shipping damage. If you
find any damage, immediately contact the last carrier.
1
Assembled outdoor unit
1
Liquid line bi−flow filter drier
General
The T−Classt TPA*S4 outdoor units use HFC−410A HFC
refrigerant. This unit must be installed with a matching
indoor blower coil and line set as outlined in the Lennox
Engineering Handbook. TPA*S4 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 expansion valve approved for use with
HFC−410A must be ordered separately and must be
installed prior to operating the unit.
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506648−01
*P506648-01*
Litho U.S.A.
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Table of Contents
Related Manuals for Lennox T?CLASS TPA S4
Summary of Contents for Lennox T?CLASS TPA S4
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Page 1: Table Of Contents
UNIT PLACEMENT refrigerant. This unit must be installed with a matching indoor blower coil and line set as outlined in the Lennox It is critical for proper unit operation to place outdoor unit on an Engineering Handbook. TPA*S4 outdoor units are elevated surface as described in Unit Placement section on page 8. -
Page 2: Unit Dimensions
Unit Dimensions − inches (mm) 4-3/8 4-3/8 Inlet Air (111) (111) 4-3/8 4-3/8 (111) (111) Optional Unit Stand- off Kit (4) (Field− installed) Compressor Coil Drain Outlets Inlet Air Inlet Air (Around Perimeter Of Base) 6-3/8 4-3/8 (162) Vapor Line (111) Connection Liquid Line... -
Page 3: Model Number Identification
Typical Unit Parts Arrangement CONTROL NOTE PLUMBING LAYOUT AND COMPRESSOR TYPE MAY VARY SLIGHTLY BETWEEN MODEL SIZES. COMPRESSOR COMPRESS0R OUTDOOR FAN SINGLE HARNESS RELAY (K−10) − G VOLTAGE ONLY CAPACITOR (C12) DEFROST DISCHARGE DEFROST CONTROL LINE THERMOSTAT GROUND (CMC1) MUFFLER (S4) LOW PRESSURE CHECK EXPANSION... -
Page 4: Operating Gauge Set And Service Valves
Each valve is equipped with a service port which has a See the Lennox Service and Application Notes #C−08−1 factory−installed valve stem. Figure 2 provides information for further details and information. on how to access and operating both angle and ball service valves. - Page 5 Operating Angle Type Service Valve: 1. Remove stem cap with an appropriately sized wrench. 2. Use a service wrench with a hex−head extension (3/16" for liquid line valve sizes and 5/16" for vapor line valve sizes) to back the stem out counterclockwise as far as it will go. SERVICE PORT CAP SERVICE PORT CORE (VALVE STEM SHOWN...
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Page 6: Recovering Refrigerant From Existing System
Recovering Refrigerant from Existing System RECOVERING REFRIGERANT FROM SYSTEM DISCONNECT POWER CONNECT MANIFOLD GAUGE SET Disconnect all power to the existing outdoor unit at the service Connect a gauge set, clean recovery cylinder and a recovery disconnect switch or main fuse box/breaker panel. machine to the service ports of the existing unit. - Page 7 MINIMUM CLEARANCE CLEARANCE ON ALL SIDES INCHES (MILLIMETERS) ABOVE UNIT 6 (152) ACCESS PANEL NOTES: 48 (1219) Clearance to one of the other three sides must be 36 inches (914mm). 30 (762) 12 (305) Clearance to one of the remaining two sides may be 12 inches (305mm) and the final side may be 6 inches (152mm).
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Page 8: New Unit Placement
(braze connections) to the indoor unit When installing a unit at grade level, the top of the slab coil (flare or braze connections). Use Lennox L15 (braze, should be high enough above the grade so that water from non−flare) series line set, or use field−fabricated refrigerant... - Page 9 It is very assistance. important that the refrigerant system be kept closed To obtain the correct information from Lennox, be sure to as much as possible. DO NOT remove line set caps communicate the following points: or service valve stub caps until you are ready to make connections.
- Page 10 LINE SET IMPORTANT Refrigerant lines must not contact structure. INSTALLATION REFRIGERANT LINE SET INSTALLING Line Set Isolation The following illustrations are VERTICAL RUNS (NEW CONSTRUCTION SHOWN) examples of proper refrigerant line set isolation: NOTE Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the REFRIGERANT LINE SET TRANSITION...
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Page 11: Brazing Connections
Brazing Connections IMPORTANT Use the procedures outline in figures 6 and 7 for brazing Connect gauge set low pressure side to vapor line line set connections to service valves. service valve and repeat procedure starting at paragraph 4 for brazing the liquid line to service port WARNING valve. - Page 12 CAP AND CORE REMOVAL CUT AND DEBUR Cut ends of the refrigerant lines square (free from nicks or dents) Remove service cap and core from both the and debur the ends. The pipe must remain round. Do not crimp end vapor and liquid line service ports.
- Page 13 WRAP SERVICE VALVES To help protect service valve seals during brazing, wrap a saturated cloth around service valve bodies and copper tube stub. Use another saturated cloth 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 suction / vapor valve stem port.
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Page 14: Flushing Line Set And Indoor Coil
Flushing Line Set and Indoor Coil Flushing is only required if existing indoor coil and line set are to be used. Otherwise proceed to Installing Indoor Metering Device on page 15. TYPICAL EXISTING FIXED ORIFICE TYPICAL EXISTING EXPANSION VALVE REMOVAL PROCEDURE REMOVAL PROCEDURE (UNCASED COIL (UNCASED COIL SHOWN) SHOWN) -
Page 15: Installing Indoor Metering Device
Refer to below illustration for reference during installation of expansion valve unit. . See the Lennox TPA*S4 Engineering Handbook for approved expansion valve kit match ups. The expansion After installation of the indoor coil metering device, valve unit can be installed internal or external to the indoor proceed to Leak Test Line Set and Indoor Coil on page 16. -
Page 16: Leak Test Line Set And Indoor Coil
Take down to 1 or 2 psig (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 WARNING refrigerant. Residual mineral oil can act as an insulator, preventing proper heat transfer. -
Page 17: Evacuating Line Set And Indoor Coil
Evacuating Line Set and Indoor Coil CONNECT GAUGE SET HIGH 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 OUTDOOR set to liquid line service valve MANIFOLD... -
Page 18: Electrical
defined as any gas that will not condense under WARNING temperatures and pressures present during operation of an air conditioning system. Non−condensables and water Danger of Equipment Damage. Avoid deep vacuum suction combine with refrigerant to produce substances operation. Do not use compressors to evacuate a that corrode copper piping and compressor parts. - Page 19 WARNING Thermostat Indoor Unit Outdoor Unit power power Electric Shock Hazard. Can cause injury common common or death. 1st. stage aux. heat 1st. stage aux. heat Line voltage is present at all components on units with single-pole contactors, even when unit is not in operation! Unit may have multiple power supplies.
- Page 20 Figure 14. Typical Unit Wiring Diagram (Y Voltage) Figure 15. Typical Unit Wiring Diagram (G Voltage) Page 20...
- Page 21 Figure 16. Typical Factory Wiring Diagram (Y Voltage) Page 21 TPA*S4 SERIES...
- Page 22 Figure 17. Typical Factory Wiring Diagram (G Voltage) Page 22...
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Page 23: Servicing Unit Delivered Void Of Charge
3. Open the liquid line and vapor line service valves Servicing Units Delivered Void of Charge (counterclockwise) to release refrigerant charge If the outdoor unit is void of refrigerant, clean the system (contained in outdoor unit) into the system. using the procedure described below. 4. - Page 24 ADDING OR REMOVING REFRIGERANT Check airflow using the Delta−T ( process using the illustration in figure 19. 1. Determine the desired DT Measure entering air temper- Temp. 24 24 24 23 23 22 22 22 20 19 18 17 16 15 ature using dry bulb (A) and wet bulb (B).
- Page 25 1 Check the airflow as illustrated in figure 19 to be sure the indoor airflow is as SUBCOOLING required. (Make any air flow adjustments before continuing with the following procedure.) 2 Measure outdoor ambient temperature; determine whether to use cooling mode or heating mode to check charge.
- Page 26 Table 5. TPA*S4−048 Table 6. TPA*S4−060 Target Target *Add *Add Subcooling Subcooling charge charge INDOOR MATCHUPS INDOOR MATCHUPS Heat Heat Cool Cool Heat Heat Cool Cool (+5ºF) (+1ºF) (+5ºF) (+1ºF) CBX26UH−048 CBX26UH−060 CBX26UH−060 CBX27UH−060−230 CBX27UH−048−230 CBX32MV−060 CBX27UH−060−230 CBX32MV−068 CBX32M−048 CBX40UHV−060 CBX32M−060 CH33−60D CBX32MV−048...
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Page 27: System Operation
Table 8. HFC−410A Temp. (°F) − Pressure (Psig) Filter Drier The unit is equipped with a large−capacity bi−flow filter drier °F Psig °F Psig °F Psig °F Psig which keeps the system clean and dry. If replacement is −40 10.1 80.5 158.2 278.2... -
Page 28: Defrost System
Units with defrost control 100269−04: Factory default Defrost System is 90 minutes The TPA*S4 defrost system includes two components: a If the timing selector jumper is missing, the defrost defrost thermostat (S6) and a defrost control (CMC1). control defaults to a 90−minute defrost interval. Compressor Delay (P5) The defrost control has a field−selectable function to reduce occasional sounds that may occur while the unit is... -
Page 29: Maintenance
1. Air Filter Ask your Lennox dealer to show you for your geographic area or service contract. where your indoor unit’s filter is located. It will be either... - Page 30 Lennox Price Book Heat Pump Operation Cleaning Outdoor Coil Your new Lennox heat pump has several characteristics that you should be aware of: 1. Make sure power is off before cleaning. Clean and inspect outdoor coil. The coil may be flushed with a Heat pumps satisfy heating demand by delivering water hose.
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Page 31: Start−Up And Performance Checklist
TPA*S4 Checklist Job Name Job no. Date Job Location City State Installer City State Unit Model No. Serial No. Service Technician Nameplate Voltage Rated Load Ampacity Compressor Outdoor Fan Maximum Fuse or Circuit Breaker Electrical Connections Tight? - Indoor Filter clean? - Supply Voltage (Unit Off) Indoor Blower RPM S.P.