Lennox T?CLASS TPA024S4 Unit Information Download | Manualshive

Page: 19 / 32

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Page 19

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. Connect conduit to the control panel using a proper conduit fitting.

ROUTING HIGH VOLTAGE/ GROUND AND CONTROL WIRING

WIRE RUN LENGTH

AWG# INSULATION TYPE

LESS THAN 100’ (30 METERS)

18 TEMPERATURE RATING

MORE THAN 100’ (30 METERS) 16 35ºC MINIMUM.

Install low voltage wiring from outdoor to indoor unit and from
thermostat to indoor unit as illustrated.

HIGH VOLTAGE / GROUND WIRES

CONTROL WIRING

A

Run 24VAC control wires through hole with grommet.

B

Make 24VAC thermostat wire connections to CMC1.

NOTE For proper voltages, select thermostat wire (control
wires) gauge per Table above

.

NOTE Wire tie provides low voltage wire strain relief and
to maintain separation of field installed low and high voltage
circuits.

NOTE Do not bundle any excess 24VAC control wires inside
control panel.

TYPICAL CONTROL WIRING

R

C

W1

Y1

O

G

R

C

W1

W2

W3

G

reversing valve

Thermostat

Indoor Unit

R

C

W1

Y1

O

Outdoor Unit

power

common

1st. stage aux. heat

indoor blower

compressor

(SOME CONNECTIONS MAY NOT APPLY. REFER
TO SPECIFIC THERMOSTAT AND INDOOR UNIT.)

power

common

1st. stage aux. heat

Low Voltage Wiring

R

C

W1

Y1

O

G

R

C

W1

W2

W3

G

Thermostat

Indoor Unit

Outdoor Unit

E

R

C

W1

Y1

O

1st. stage aux. heat

emer.

heat

relay

outdoor t’stat

(SOME CONNECTIONS MAY NOT APPLY. REFER TO

SPECIFIC THERMOSTAT AND INDOOR UNIT.)

reversing valve

power

common

1st. stage aux. heat

indoor blower

compressor

power

common

emergency heat

Low Voltage Wiring (with Auxiliary Heat)

GROUND

HIGH VOLTAGE
CONNECTIONS

(CONTACTOR)

CONTROL WIRE
CONNECTIONS

GROMMET AND WIRE TIE FOR

CONTROL WIRES

CUTOUT FOR HIGH

VOLTAGE CONDUIT

DEFROST CONTROL

BOARD (CMC1)

THREE PHASE

SINGLE PHASE

CONTROL WIRE
CONNECTIONS

DEFROST CONTROL

BOARD (CMC1)

CUTOUT FOR HIGH

VOLTAGE CONDUIT

GROUND

HIGH VOLTAGE
CONNECTIONS

(CONTACTOR)

HIGH VOLTAGE
FIELD WIRING

LOW VOLTAGE
FIELD WIRING

FACTORY
WIRING

GROMMET AND WIRE TIE

FOR CONTROL WIRES

A

B

B

A

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Summary of Contents for T?CLASS TPA024S4

Page 1: ...l Control Panel Parts Arrangement 4 Typical Unit Parts Arrangement 5 Model Number Identification 5 Unit Components 6 General Information 8 Operating Gauge Set and Service Valves 8 Recovering Refrigerant from Existing System 10 Unit Placement 11 New or Replacement Line Set 12 Metering Devices and Flushing the System 15 Testing for Leaks 16 Evacuating the System 17 Electrical Connections 18 Servicin...

Page 2: ...or W hp 149 1 5 149 1 5 248 1 3 L s Cfm 945 2000 965 2042 1530 3242 Rev min 942 917 904 Watts 138 158 313 Shipping Data kg lbs 1 package 64 140 82 180 113 250 Electrical Data Line voltage data 50 hz 1ph 220 240V 220 240V 220 240V 2 Maximum overcurrent protection amps 25 35 35 3 Minimum circuit ampacity 14 7 21 1 21 6 Compressor Rated load amps 10 9 16 0 15 9 Locked rotor amps 60 0 87 0 98 0 Power ...

Page 3: ...ts 158 313 275 Shipping Data kg lbs 1 package 82 180 113 250 116 255 Electrical Data Line voltage data 50 hz 3ph 380 420V 380 420V 380 420V 2 Maximum overcurrent protection amps 10 10 15 3 Minimum circuit ampacity 8 0 8 6 10 7 Compressor Rated load amps 6 0 6 1 7 8 Locked rotor amps 46 0 43 0 51 5 Power factor 0 55 1 0 1 0 Outdoor Fan Motor Full load amps 1 1 2 2 2 3 Locked rotor amps 1 9 4 1 3 1 ...

Page 4: ...S4N41T 24 1 4 616 33 1 4 845 32 1 2 826 TPA036S4N41M 24 1 4 616 33 1 4 845 32 1 2 826 TPA036S4N41T 28 1 4 718 37 940 36 1 4 921 TPA048S4N41M 28 1 4 718 37 940 36 1 4 921 TPA048S4N41T 28 1 4 718 37 940 36 1 4 921 TPA060S4N41M 28 1 4 718 43 1 4 1099 42 1 2 1080 Typical Control Panel Parts Arrangement3 GROUND LUG CONTACTOR LOCATION CONTROL CAPACITOR CONTROL WIRE LOOP CUTOUT FOR HIGH VOLTAGE CONDUIT D...

Page 5: ...MAY VARY SLIGHTLY BETWEEN MODEL SIZES Model Number Identification5 T P A M 1 036 S 4 4 N Major Design Sequence A 1st Generation B 2nd Generation Brand Family T T Classt Product Line Unit Type P Split System Heat Pump 024 2 Ton 030 2 5 Tons 0036 3 Tons 048 4 Tons 060 5Tons Cooling Efficiency S Standard Efficiency Minor Design Sequence 1 1st Revision 2 2nd Revision 3 3rd Revision Voltage M 380 420V ...

Page 6: ...ndenser fans used in this model Access to the condenser fan motor on all units is gained by removing the seven screws securing the fan assembly as illustrated in Figure 1 The condenser fan motor is removed from the fan guard by removing the four nuts found on the top panel Drip loops should be used in wiring when servicing motor See Figure 1 if condenser fan motor replacement is necessary FAN Remo...

Page 7: ...e to service drier must be replaced All replacement driers must be approved for HFC 410A refrigerant COMPRESSOR All TPA S4 units utilize a scroll compressor The scroll compressor design is simple efficient and requires few moving parts A cutaway diagram of the scroll compressor is illustrated in Figure 4 The scrolls are located in the top of the compressor can and the motor is located just below T...

Page 8: ...ion Operating Gauge Set and Service Valves8 These instructions are intended as a general guide and do not supersede local codes in any way Consult authorities who have jurisdiction before installation TORQUE REQUIREMENTS When servicing or repairing heating ventilating and air conditioning components ensure the fasteners are appropriately tightened Table 1 lists torque values for fasteners IMPORTAN...

Page 9: ... port 3 When testing is completed replace service port cap and tighten as fol lows 1 2 3 4 5 6 7 8 9 10 11 12 1 6 TURN 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 Operating Ball T...

Page 10: ...mpressor stops pumping when the pressure ratio meets a certain value or when the suction pressure is as high as 20 psig Compressor suction pressures should never be allowed to go into a vacuum Prolonged operation at low suction pressures will result in overheating of the scrolls and permanent damage to the scroll tips drive bearings and internalseals Once the compressor can not pump down to a lowe...

Page 11: ...s has a very high level of sound transmission For proper placement of unit in relation to a window see the provided illustration in Figure 8 INSTALL UNIT AWAY FROM WINDOWS TWO 90 ELBOWS INSTALLED IN LINE SET WILL REDUCE LINE SET VIBRATION Figure 8 Outside Unit Placement PLACING OUTDOOR UNIT ON SLAB When installing a unit at grade level the top of the slab should be high enough above the grade so t...

Page 12: ...f there is a rise or drop of the piping LIQUID LINE FILTER DRIER12 INSTALLATION OR REPLACEMENT The filter drier one is shipped with each unit must be field installed in the liquid line between the outdoor unit s liquid line service valve and the indoor coil s metering device TXV as illustrated in Figure 10 This filter drier must be installed to ensure a clean moisture free system Failure to instal...

Page 13: ...be used if line set is to be installed on exterior of outside wall PVC PIPE FIBERGLASS INSULATION CAULK OUTSIDE WALL VAPOR LINE WRAPPED WITH ARMAFLEX LIQUID LINE OUTSIDE WALL LIQUID LINE VAPOR LINE WOOD BLOCK BETWEEN STUDS STRAP WOOD BLOCK STRAP SLEEVE WIRE TIE WIRE TIE WIRE TIE INSIDE WALL REFRIGERANT LINE SET INSTALLING VERTICAL RUNS NEW CONSTRUCTION SHOWN INSTALLATION LINE SET NOTE Insulate liq...

Page 14: ...ction on the vapor service valve NOTE The fixed orifice or check expansion valve metering device at the indoor unit will allow low pressure nitrogen to flow through the system NITROGEN HIGH LOW USE REGULATOR TO FLOW NITROGEN AT 1 TO 2 PSIG BRAZE LINE SET INSTALL SERVICE PORT CAPS ONLY Braze the liquid line to the liquid line service valve Turn off nitrogen flow After all connections have been braz...

Page 15: ...itting to temporary reconnect the liquid line to the indoorunit s liquid line orifice housing I Reverse above order to install LOW HIGH EXISTING INDOOR UNIT GAUGE MANIFOLD INVERTED HCFC 22 CYLINDER CONTAINS CLEAN HCFC 22 TO BE USED FOR FLUSHING LIQUID LINE SERVICE VALVE INLET DISCHARGE TANK RETURN CLOSED OPENED RECOVERY CYLINDER RECOVERY MACHINE NEW OUTDOOR UNIT VAPOR LINE SERVICE VALVE VAPOR LIQU...

Page 16: ...ith a leak detector F After leak testing disconnect gauges from service ports USE REGULATOR TO FLOW NITROGEN AT 1 TO 2 PSIG LINE SET AND INDOOR COIL After the line set has been connected to the indoor unit and air conditioner check the line set connections and indoor unit for leaks Use the following procedure to test for leaks LEAK TEST A Connect an HFC 410A manifold gauge set high pressure hose t...

Page 17: ...ise above 500 microns 29 9 inches of mercury within a 20 minute period after shutting off the vacuum pump and closing the manifold gauge valves F When the absolute pressure requirement above has been met disconnect the manifold hose from the vacuum pump and connect it to an uprightcylinder of HFC 410A refrigerant Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line ...

Page 18: ...s and refer to unit nameplate for minimum circuit ampacity and maximum overcurrent protection size 24VAC TRANSFORMER Use the transformer provided with the furnace or air handler for low voltage control power 24VAC 40 VA minimum SERVICE DISCONNECT SWITCH MAIN FUSE BOX BREAKER PANEL Refer to the unit nameplate for minimum circuit ampacity and maximum fuse or circuit breaker HACR per NEC Install powe...

Page 19: ...cess 24VAC control wires inside control panel TYPICAL CONTROL WIRING R C W1 Y1 O G R C W1 W2 W3 G reversing valve Thermostat Indoor Unit R C W1 Y1 O Outdoor Unit power common 1st stage aux heat indoor blower compressor SOME CONNECTIONS MAY NOT APPLY REFER TO SPECIFIC THERMOSTAT AND INDOOR UNIT power common 1st stage aux heat Low Voltage Wiring R C W1 Y1 O G R C W1 W2 W3 G Thermostat IndoorUnit Out...

Page 20: ...ocedure outlined in Figure 15 Unit Start Up19 IMPORTANT If unit is equipped with a crankcase heater it should be energized 24 hours before unit start up to prevent compressor damage as a result of slugging 1 Rotate fan to check for binding 2 Inspect all factory and field installed wiring for loose connections 3 After evacuation is complete open the liquid line and suction line service valves to re...

Page 21: ...perature of air entering indoor coil ºF INDOOR COIL DRY BULB DRY BULB WET BULB B TDrop 19º A Dry bulb Wet bulb ºF A 72º B 64º C 53º air flow air flow All temperatures are expressed in ºF 1 Determine the desired DT Measure entering air temperature using dry bulb A and wet bulb B DT is the intersecting value of A and B in the Table see triangle 2 Find temperature drop across coil Measure the coil s ...

Page 22: ...sures with Normal Operating Pressures in either Table 5 or 6 The reference table is a general guide Expect minor pressure variations Significant differences may mean improper charge or other system problem 5 Set thermostat for heat cool demand depending on mode being used Using cooling mode When the outdoor ambient temperature is 60 F 15 C and above Target subcooling values in table below are base...

Page 23: ...th some component in the system Table 5 Normal Operating Pressures Liquid 10 and Vapor 5 Psig 1 Phase T Voltage 220 240VAC 1 Phase 50 Hertz 024 036 048 Cooling 5F 5C Liquid Vapor Liquid Vapor Liquid Vapor 65 18 268 129 268 141 247 138 75 24 311 133 309 143 286 141 85 29 358 136 354 146 330 143 95 35 410 140 402 149 377 146 105 41 468 144 456 152 429 149 115 45 531 148 513 155 486 151 Heating 60 15...

Page 24: ... at or above 40 psig and opens at 25 psig It is not adjustable High Pressure Switch The is equipped with a manual reset high pressure switch single pole single throw which is located on the liquid line The switch shuts off the compressor when discharge pressure rises above the factory setting The switch is normally closed and is permanently adjusted to trip open at 590 10 psig 4412 69 kPa NOTE A S...

Page 25: ... Simultaneous Slow Flash Normal operation Alternating Slow Flash 5 minute anti short cycle delay Simultaneous Fast Flash Ambient Sensor Problem Alternating Fast Flash Coil Sensor Problem ON ON Circuit Board Failure Fault and Lockout Codes OFF Slow Flash Low Pressure Fault OFF ON Low Pressure Lockout Slow Flash OFF High Pressure Fault ON OFF High Pressure Lockout Slow Flash ON Discharge Line Temp F...

Page 26: ... TEST pins for longer than one second but less than two seconds Clears any short cycle lockout and five strike fault lockout function if applicable No other functions will be executed and unit will continue in the mode it was operating Place a jumper on TEST pins for more than two seconds Clears any short cycle lockout and five strike fault lockout function if applicable If in HEATING Mode If in D...

Page 27: ...r coil may be flushed with a water hose Ensure power is off before cleaning NOTE It may be necessary to flush the outdoor coil more frequently if it is exposed to substances which are corrosive or which block airflow across the coil e g pet urine cottonwood seeds fertilizers fluids that may contain high levels of corrosive chemicals such as salts Sea Coast Moist air in ocean locations can carry sa...

Page 28: ...Operation Block outdoor coil to maintain a minimum of 375 psig during testing Heating Mode Operation Block indoor coil to maintain a minimum of 375 psig during testing Start Up and Performance Checklist26 Customer Address Indoor Unit Model Serial Outdoor Unit Model Serial Solar Module Mfg and Model Serial Notes START UP CHECKS RefrigerantType Rated Load Amps Actual Amps Rated Volts Actual Volts Co...

Page 29: ... OF FIRST STAGE HEAT See steps 4 5 and 6 DEFROST MODE During heating operation when outdoor coil temperature drops below 35 F 2 C or 42 F 5 5 C defrost switch thermostat S6 closes 1 Defrost control defrost control board begins timing If defrost thermostat S6 remains closed at the end of the 30 60 or 90 minute period defrost relay energizes and defrost begins 2 During defrost defrost control board ...

Page 30: ...Page 30 Figure 19 Typical Field Wiring Diagram M Voltage 380 420v 3PH 50Hz ...

Page 31: ...e steps 4 5 and 6 DEFROST MODE During heating operation when outdoor coil temperature drops below 35 F 2 C or 42 F 5 5 C defrost switch thermostat S6 closes 1 Defrost control defrost control board begins timing If defrost thermostat S6 remains closed at the end of the 30 60 or 90 minute period defrost relay energizes and defrost begins 2 During defrost defrost control board energizes the reversing...

Page 32: ...Page 32 Figure 20 Typical Field Wiring Diagram T Voltage 220 240v 1PH 50Hz ...

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