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CBX32M Series - HvacPartsShop.com

1. Model Number No Volts kW 1Btuh 2 Blower 3 Minimum 5 Maximum Single Point of Input In Input Motor Circuit Overcurrent Power Source Stages put Full Ampacity Protection bi Ck CK Minimum 5 Maximum mps 4 2 3 1 2 3 Circuit Overcurrent Ampacity Protection SINGLE PHASE 4 kW ECB29 4 55W87 1 208 10 250 3 9 23 nos DS ie sai es S2 me 4 lbs Terminal Block 220 3 4 11 450 3 9 26 cron limes p S Ru Ez Tes ECB29 4CB 55W88 i 20A Circuit breaker 230 37 12 550 3 9 eeel SON a Eu e 240 40 13 650 39 DGL Eu Cu 5 KW ECB29 5 28 31 1 208 38 12 800 3 9 Py ei Eu ee 4 Ibs Terminal Block 220 4 2 14 300 29 21 EE aoe 435 ar AUR rZ ECB29 5CB 28K32 i SUA ireliit breaker 230 46 15700 3 9 Eu us 240 50 17 0100 3 9 341 35 Eu Cu 6 kW ECB29 6 47122 1 208 45 15400 3 9 sex nes ne ses E ee 4 Ibs Terminal Block 220 5 0 17 100 3 9 36 REN 2 440 ar AUR rZ 29 6 47123 230 55 18 800 39 36 440 Ee Tez 240 6 0 20 500 39 36 440 e 8 kW ECB29 8 28K33 1 208 60 20 500 39 40 esa jj E tid 5 Ibs Terminal Block 220 6 7 22 900 3 9
2. Model Number No Input 2 Blower 3 Minimum 5 Maximum of Motor Full Circuit Overcurrent Stages Volts kW Btuh Load Amps Ampacity Protection SINGLE PHASE 2 5 kW ECB29 2 5 28K30 1 208 1 9 6 400 1 5 13 15 220 2 1 7 200 1 5 15 15 230 2 3 7 800 1 5 15 15 240 2 5 8 500 1 5 15 15 4 kW ECB29 4 55W87 1 208 3 0 10 250 1 5 20 20 4 Ibs Terminal Block ECB29 4CB 55W88 220 3 4 11 450 1 5 23 25 30A Circuit breaker 230 3 7 12 550 1 5 23 25 240 4 0 13 650 1 5 23 25 5 kw ECB29 5 28K31 1 208 3 8 12 800 1 5 24 425 4 Ibs Terminal Block ECB29 5CB 28K32 220 4 2 14 300 1 5 28 30 30A Circuit breaker 230 4 6 15 700 1 5 28 30 240 5 0 17 100 1 5 28 30 6 kw ECB29 6 47L22 1 208 4 5 15 400 1 5 29 430 4 Ibs Terminal Block ECB29 6CB 47123 220 5 0 17 100 1 5 33 35 35A Circuit breaker 230 5 5 18 800 1 5 33 35 240 6 0 20 500 1 5 33 35 8 kW ECB29 8 28K33 1 208 6 0 20 500 1 5 38 440 5 Ibs Terminal Block ECB29 8CB 28K34 220 6 7 22 900 1 5 44 45 45A Circuit breaker 230 7 3 25 100 1 5 44 45 240 8 0 27 300 1 5 44 45 9 kW ECB29 9CB 10L11 2 208 6 8 23 100 1 5 42 445 5 Ibs 50A Circuit breaker ECB29EH 9CB 91K67 220 7 6 25 800 1 5 49 50 50A Circuit breaker 230 8 3 28 200 1 5 49 50 240 9 0 30 700 1 5 49 50 10 kw ECB29 10 28K35 2 208 7 5 25 600 1 5 47 450 6 lbs Terminal Block ECB29 10CB 28K36 220 8 4 28 700 1 5 54 60 60A Circuit br
3. m bagi 600 20 0 68 200 61 3 Wm TA adu 25 kW ECB29 25CB 28K46 2 208 18 8 64 100 24 35 27 40 440 70 70 220 21 0 71 700 24 41 30 45 45 74 80 230 23 0 78 300 24 41 30 45 45 74 80 240 25 0 85 300 24 41 30 45 45 78 80 ECB29 25 28K50 2 440 210 714 700 1 3 3 40A Fuses 460 23 0 78 300 1 3 ez dm m ES 480 25 0 85 300 1 3 TA hal 5 ECB29 25 28K52 2 550 21 0 71 700 61 3 A see Les 575 23 0 78 300 61 3 32 ex ae ET 600 25 0 85300 61 3 C iHe S NOTE Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps 1 Electric heater capacity only does not include additional blower motor heat capacity Amps shown are for blower motor only 3 Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at least 167 F 75 C Bold text indicates that the circuit breaker on CB circuit breaker models must be replaced with size noted See table on page 2 5 All 575v electric heaters are used with 460V air handler units A 575V to 460V Step down transformer for the air handler unit is furnished with all 575V electric heaters 6 Blower motor is rated at 460V 7 HACR type circuit breaker or fuse Page 19 ELECTRIC HEAT DATA CBX32M 060
4. m 50A Circuit breaker 230 8 3 28 200 2 4 50 50 240 9 0 30 700 24 50 50 gue m 10 kW ECB29 10 28K35 2 208 7 5 25 600 24 48 450 m e be PE 220 84 28700 24 55 60 Ee 60A Circuit breaker 230 9 2 31 400 2 4 55 60 240 10 01 34 100 24 55 60 Em EET 125 29 12 5 28K37 2 208 94 32000 24 22 34 25 445 61 70 PARIR kac s 220 105 35800 24 25 35 25 50 63 70 1 25A and 230 11 5 39200 24 25 35 25 50 63 70 1 S0A Circuit breaker 240 12 5 42 6001 24 25 35 25 50 68 70 15kw ECB29 15CB 28K38 2 208 11 3 38400 24 26 37 30 450 72 80 des 75500 220 12 6 43000 24 29 42 30 60 74 80 1 30A and 230 13 5 47 000 24 29 42 30 60 74 80 SPA Breaker 240 15 0 51 200 24 29 42 30 81 90 20kw 29 20 11131 2 208 15 01 51 200 24 45 41 1 445 60 95 100 19108 220 16 8 57 300 24 50 46 50 60 99 100 1 50A and 230 18 4 62 700 24 50 46 50 60 99 100 11 SDA Breaker 240 200 68200 24 501 46 50 60 107 110 25kW ECB29 25CB 28K40 3 208 18 8 64100 24 40 31 440 45 445 118 125 220
5. 25 zu E 222 3 25 Fuses 460 13 8 47 00 19 25 235 e 480 15 0 51 200 1 9 25 25 ne mm 29 20 28 45 2 208 15 0 51 200 3 9 30 21 30 430 58 60 2 35A Circuit breaker 220 16 8 57 300 39 35 24 35 35 63 70 230 18 4 62 700 3 9 35 24 35 35 63 70 240 20 0 68 200 3 9 35 24 35 35 65 70 ECB29 20 28K49 1 440 16 8 57 300 19 32 35 m ZEN ER 3 35A Fuses 460 18 4 62 700 19 32 35 480 20 0 68 200 19 32 35 Sum ENT TEE 5 ECB29 20 28K51 1 550 16 8 57300 61 9 26 30 E EE 3 25 Fuses 575 18 4 62700 61 9 26 30 mus ES ES 600 20 0 68 200 61 9 26 30 Sex ER ECB29 25CB 28K46 2 208 18 8 64 100 3 9 37 27 40 140 72 80 2 45A Circuit breaker 220 210 71 700 3 9 43 30 45 45 77 80 230 23 0 78 300 3 9 43 30 45 45 77 80 240 25 0 85 300 3 9 43 30 45 45 80 80 ECB29 25 28K50 2 440 21 0 71 700 19 40 45 mum SU ER 3 40A Fuses 460 23 0 78 300 19 40 45 480 25 0 85 300 19 40 45 mum I ER 5 ECB29 25 28K52 2 550 21 0 71700 619 32 35 mum SE ER 3 35A Fuses 575 23 0 78 300 5619 32 35 600 25 0 85 300 619 32 35 ES E ae NOTE Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps 1 Electric heater capacity only does not include additiona
6. V START UP OPERATION A Preliminary and Seasonal Checks 1 Make sure the unit is installed in accordance with the instal lation instructions Inspect electrical wiring both field and factory installed for loose connections Tighten as required Check voltage at disconnect switch Voltage must be within range listed on the nameplate If not consult the power company and have voltage condition corrected before starting unit 4 Check to ensure that refrigerant lines are in good con dition and pipe insulation is intact 5 Inspect condition of condensate drain pan and piping as sembly Disassemble and clean seasonally B Cooling Start Up NOTE The following is a generalized procedure and does not apply to all thermostat control systems Electronic thermostat control systems may operate differently 1 Set fan switch to AUTO or ON and move the system selec tion switch to COOL Adjust the thermostat to a setting far enough below room temperature to bring on the compressor Compressor will start and cycle on demand from the thermo stat 2 The refrigerant circuit is charged with R410A refrigerant See condensing unit rating plate for correct charge amount 3 Refer to the correct condensing unit service manual for more information C Heating Start Up 1 Set the fan switch to AUTO or ON and move the system selection switch to HEAT Adjust the thermostat setting above room temperature 2 The indoor blower immediately
7. 240 15 0 51 200 1 72 47 50 M us ECB29 15 28K48 1 440 12 6 43 000 14 24 30 ium sas 25A Fuses 460 13 8 47 000 1 1 24 30 uie m 480 15 0 51 200 1 1 24 vse 30 ss ug T ECB29 20CB 28K45 2 208 15 0 51 200 172 28 21 430 30 56 60 220 16 8 57 300 1 72 32 24 35 35 58 60 230 18 4 62 700 1 72 32 24 35 35 58 60 240 20 0 68 200 1 72 32 24 35 35 62 70 NOTE Circuit 1 Minimum Circuit Ampacity includes the Blower 1 Electric heater capacity only does not include additional blower motor heat capacity Amps shown are for blower motor only 3 Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at least 167 F 75 C Bold text indicates that the circuit breaker on CB circuit breaker models must be replaced with size noted See table on page 2 5 All 575v electric heaters are used with 460V air handler units A 575V to 460V Step down transformer for the air handler unit is furnished with all 575V electric heaters 6 Blower motor is rated at 460V 7 HACR type circuit breaker or fuse ELECTRIC HEAT DATA CBX32M 042 otor Full Load Amps Model Number No Input Blower Minimum Maximum Single Point of Motor Circuit Overcurrent Powe
8. LENNOX J Service Literature UNIT INFORMATION Corp 0205 L3 Revised April 2012 CBX32M CBX32M HFC 410A SERIES UNIT IT IS HIGHLY RECOMMENDED IF THE AIR HANDLER IS INSTALLED IN A UNCONDITIONED SPACE THAT A CIRCUIT BREAKER COVER ORDERED SEPARATELY IS USED ORDER LENNOX CATALOG f 82W01 CIRCUIT BREAKER OPENING L 7 1 1 1 CIRCUIT BREAKER h COVER U ji A WARNING Improper installation adjustment alteration service or maintenance can cause personal injurv loss of life or damage to property Installation and service must be performed by a licensed professional installer or equivalent or a service agency A CAUTION Physical contact with metal edges and corners while applying excessive force or rapid motion can result in personal injury Be aware of and use caution when working near these areas during installation or while servicing this equipment Technical Publications Page 1 Table of Contents General vitae CERE bea 1 Specifications 2 Blower Data 3 Parts Arrangement 6 I Application RR RS 7 Il Unit Components 7 Optional Electric Heat Data 8 IV Configuration Modifications 22 V Start Up 25 VI Typical Operating Ch
9. 0 05 2110 780 1950 700 0 10 2080 765 1930 685 0 15 2045 755 1910 675 0 20 2005 740 1880 660 0 25 1965 725 1850 645 0 30 1920 710 1815 630 0 40 1820 680 1735 600 0 50 1710 650 1635 570 0 60 1585 615 1520 540 0 70 1450 585 1390 505 0 80 1305 550 1245 475 0 85 1225 535 1165 460 NOTE All air data is measured external to unit with air filter in place with bottom retum air Electric heaters have no appreciable air resistance Page 5 Parts Arrangements BLOWER ACCESS PANEL COIL ACCESS PANEL SMALL ELECTRIC HEAT KNOCK OUT FOR 2 5 15 kW GROUNDING LUGS CBX32M PARTS ARRANGEMENT FIGURE 1 CBX32M CONTROL BOX LARGE ELECTRIC HEAT KNOCK OUT FOR 20 30 kW BLOWER RELAY K3 TRANSFORMER T1 TERMINAL STRIP TB1 BRACKET FOR TERMINAL STRIP FIGURE 2 Page 6 ELECTRIC HEAT SECTION CONTROL BOX BLOWER EXPANSION VALVE COMPLETE WITH SCREEN TERMINAL STRIP 1 I APPLICATION CBX32M blower coils are designed for R410A applications only All major blower coil components must be matched according to Lennox recommendations for the unit to be covered under warranty Refer to the Engineering Handbook for approved system matchups A misapplied system will cause er ratic operation and can result in early unit failure The units come with factory instal
10. 12 550 1 73 23 425 E ds 240 4 0 13 650 1 73 23 425 5 kw 29 5 28 31 1 208 3 8 12 800 1 73 25 425 4 Ibs Terminal Block ECB29 5CB 28K32 220 4 2 14 300 1 73 28 30 30A Circuit breaker 230 4 6 15 700 1 73 28 30 240 5 0 17 100 1 73 28 30 6 kw 29 6 47122 1 208 4 5 15 400 1 73 30 430 4 Ibs Terminal Block ECB29 6CB 47123 220 5 0 17 100 1 73 33 35 35A Circuit breaker 230 5 5 18 800 1 73 33 35 240 6 0 20 500 1 73 33 35 8 kw 29 8 28 33 1 208 6 0 20 500 1 73 38 440 5 Ibs Terminal Block ECB29 8CB 28K34 220 6 7 22 900 1 73 44 45 45A Circuit breaker 230 7 3 25 100 1 73 44 45 240 8 0 27 300 1 73 44 45 9 kW ECB29 9CB 10111 2 208 6 8 23 100 1 73 43 445 5 Ibs 50A Circuit breaker ECB29EH 9CB 91K67 220 7 6 25 800 1 73 49 50 50A Circuit breaker 230 8 3 28 200 1 73 49 50 240 9 0 30 700 1 73 49 50 10 kw 29 10 28 35 2 208 7 5 25 600 1 73 47 450 6 Ibs Terminal Block ECB29 10CB 28K36 220 8 4 28 700 1 73 54 60 60A Circuit breaker 230 9 2 31 400 1 73 54 60 240
11. REFER TO UNIT NAMEPLATE FOR MINIMUM CIRCUIT AMPACITY AND AXIMUM OVER PROTECTION SIZE LENNOX toc WIRING DIAGRAM 11725 HEATING UNITS ELECTRIC 29 20 25 1 Supersedes Form 1995 Lennox Industries Inc New Form No 531 707W Litho U S A 29 20 25CB 208 230V THREE PHASE SEQUENCE OF OPERATION FIRST STAGE HEAT 1 When there is a call for heat W1 of the thermostat en ergizes the electric heat relays K32 and K34 with 24VAC When K32 1 closes the blower is energized on heat ing speed and economizer heat relay K43 is energized see 208 230VAC CB schematic When K32 1 and K32 2 closes assuming the N C pri mary S15 and secondary S20 limit switches are closed electric heat elements HE1 and HE2 are ener gized When K34 1 closes assuming the N C primary S15 and secondary S20 limit switches are closed electric heat element HE3 is energized SECOND STAGE HEAT remove jumper between W2 and R 5 When K34 2 closes the unit is ready for a second stage heat demand W2 of the thermostat sends a second stage Page 37 heat demand energizing the electric heat relays K33 and K35 with 24VAC When K33 1 closes the blower if not energized is en ergized on heating speed and economizer heat relay K43 is energized see 208 230VAC CB schematic When K33 1 K35 1 and K35 2 contacts close assuming the N C primary S15 and secondary S20 limit swi
12. 13 8 47000 hatte ESAE TA 480 150 84200 sa mie les au ECB29 20CB 28 45 2 208 15 0 51 200 24 29 21 430 430 56 60 2 Soe Circuit breaker 220 16 8 57 00 24 33 24 35 35 60 60 230 18 4 62700 24 33 24 35 35 60 60 240 20 0 68200 24 33 24 35 35 63 70 NOTE Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps 1 Electric heater capacity only does not include additional blower motor heat capacity 2 Amps shown are for blower motor only 3 Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at least 167 F 75 C 4 Bold text indicates that the circuit breaker on CB circuit breaker models must be replaced with size noted See table on page 2 5 All 575v electric heaters are used with 460V air handler units A 575V to 460V Step down transformer for the air handler unit is furnished with all 575V electric heaters 6 Blower motor is rated at 460V 7 HACR type circuit breaker or fuse Page 17 ELECTRIC HEAT DATA CBX32M 048 Model Number No Volts kW Btuh Blower 3 Minimum 5 Maximum Single Point of jinputjinputj Input Motor Circuit Overcurrent Power Source Stages Full Ampacitv Protect
13. 21 0 71 700 24 47 35 35 50 50 50 120 125 230 23 0 78 300 24 47 35 35 50 50 50 120 125 240 25 0 85300 24 47 35 35 50 50 50 133 150 NOTE Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps 1 Electric heater capacity only does not include additional blower motor heat capacity Amps shown are for blower motor only 3 Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at least 167 F 75 C Bold text indicates that the circuit breaker on CB circuit breaker models must be replaced with size noted See table on page 2 5 All 575v electric heaters are used with 460V air handler units A 575V to 460V Step down transformer for the air handler unit is furnished with all 575V electric heaters 6 Blower motor is rated at 460V 7 HACR type circuit breaker or fuse Page 18 Model Number No Input 2 Blower 3 Minimum 7 Maximum Single Point of Motor Circuit Overcurrent Power Source Stages Full Ampacity Protection Volts kw Ckt2 3 Minimum 5 Maximum Circuit Overcurrent Ampacity Protection THREE PHASE 8 kW ECB29 8 28K42 1 208 6 0 20 500 24 wus eee EN os Te
14. 47 PE ERA 4 50 DEL me BE 29 8 28 34 breaker 230 7 3 25 100 39 sec e WE 240 27300 39 ATO eee eae bes 9 kW 29 9 10L11 2 208 6 8 23 1001 39 451 522 475 445 222 mm 5 Ibs 50A Circuit breaker 4 220 7 6 25800 3 9 52 460 pro ECB29EH 9CB 91K67 i EDA Circuit breaker 230 83 28200 3 9 EHE b 240 90 30 700 39 SITE fi 460222 See pro 10 kW ECB29 10 28K35 2 208 75 25600 3 9 2 ERE mp 6 Ibs Terminal Block 220 8 4 28 700 39 57 60 mm i 225 MM ECB29 10CB 28K36 GOA Circuit breaker 230 92 31 400 39 eee EHE bcr 240 10 0 34 100 3 9 S7 60 bee eee Ex uw 12 5 ECB29 12 5CB 28K37 2 208 94 32 000 3 9 23 31 25 445 63 70 Pup rs 220 10 5 35 800 3 9 27 35 430 50 66 70 1 25A and 230 11 5 39200 3 9 27 35 430 50 66 70 1 50A Circuit breaker 240 12 5 42 600 3 9 27 35 430 50 70 70 15 kW ECB29 15CB 28K38 2 208 11 3 38400 39 27 37 450 74 80 12 Ibs Expos 220 12 6 43 000 3 9 31 42 435 60 77 80 1 30A and 230 13 5 47 000 3 9 31 42 435 60 77 80 1 60A Circuit breaker 240 15 0 51 200 3 9 31 42 435 60 83 90 20 kW ECB29 20CB 11L31 2 208 15 0 5120
15. 580 375 1060 500 300 915 430 255 60 150 1100 520 345 960 455 280 775 365 230 70 175 950 450 320 830 390 255 590 280 205 75 185 870 410 305 750 355 245 485 230 195 CBX32M 036 BLOWER PERFORMANCE 460V External Static Air Volume amp Motor Watts at Specific Blower Taps Pressure in w g High Low cfm Watts cfm Watts 0 1525 505 1120 390 0 05 1520 495 1150 385 0 10 1510 480 1170 380 0 15 1495 470 1180 375 0 20 1475 455 1190 370 0 25 1450 440 1185 360 0 30 1415 430 1175 350 0 40 1335 400 1135 325 0 50 1230 375 1060 300 0 60 1100 345 960 280 0 70 950 320 830 255 0 75 870 305 750 245 NOTE All air data is measured external to unit with air filter in place with bottom retum air Electric heaters have no appreciable air resistance CBX32M 042 BLOWER PERFORMANCE 208 230v Air Volume and Motor Watts at Specific Blower Taps High Medium Low in w g Pa cfm L s Watts cfm L s Watts cfm Lis Watts 00 0 1825 860 565 1600 755 455 1325 625 370 05 10 1790 845 555 1585 750 455 1335 630 370 10 25 1750 825 540 1565 740 450 1335 630 370 15 35 1710 805 530 1540 725 440 1330 630 365 20 50 1660 785 520 1505 710 435 1320 620 360 25 60 1610 760 505 1470 695 425 1300 615 355 30 75 1555 735 495 1425 675 415 1270 600 350 40 100 1430 675 465 1320 625 390 1195 565 330 50 125 1290 610 440 1195 565 365 1090 515 310 60 150 1135 535 415 1050 495 335 955 450 285 70 175 965 4
16. WIRING DIAGRAM HEATING UNITS ELECTRIC ECB29 20CB 2 P Supersedes Form No 1997 Lennox Industries Inc New Form No 532 525W Litho U S A F ECB29 20CB 208 230V SINGLE PHASE SEQUENCE OF OPERATION FIRST STAGE HEAT 1 When there is call for heat W1 of the thermostat en SECOND STAGE HEAT remove jumper between W2 and R ergizes electric heat relays K32 and with 24VAC 5 When K33 1 closes the unit is ready for a second stage 2 When K32 1 closes the blower is energized on heating heat demand W2 of the thermostat sends a second stage speed and economizer heat relay K43 is energized see heat demand energizing the electric heat relays K34 and 208 230VAC CB schematic K35 with 24VAC 3 When K32 2 closes assuming the N C primary 515 6 When K34 2 closes assuming the N C primary 515 and and secondary S20 limit switches are closed electric secondary S20 limit switches are closed heating element heat element is energized HE2 is energized K34 1 closes until second stage heat de 4 When K33 2 closes assuming the N C primary S15 mand is satisfied and secondary S20 limit switches are closed electric 7 When K35 1 closes assuming the N C primary 15 heat element HE4 is energized and secondary S20 limit switches are closed electric heat element HE1 is energized Page 34 COMPONENT ARRANGEMENT CB2 o9 bs OO DESCRIP TRCUIT BREAKER ELECTRIC HEAT E
17. access panel and remove the two screws on the inside of the top half of the cabinet on both sides 3 Lift the top section apart from the bottom section 4 To lighten the cabinet for lifting the blower and coil as semblies can also be removed 5 Reassemble once the cabinet is in place B Upflow Application 1 Discard drip shields if applicable The shields are used for downflow applications only and are located with the foam pads on top of new units 2 For best efficiency and air flow the horizontal drain pan should be removed from units in upflow configu rations 3 After removing horizontal drain pan place unit in desired location Set unit so that it is level Connect return and supply air plenums as required using sheet metal screws See figure 10 UPFLOW CONFIGURATION HORIZONTAL DRAIN PAN UPFLOW DOWNFLOW DRAIN PAN sa FOR OPTIMUM PERFORMANCE REMOVE HORIZONTAL DRAIN PAN FIGURE 10 C Downflow Application NOTE CBX32M 018 024 units do not require downflow drip shields The following tables outline the sizes of the various drip shields TABLE 3 Downflow Drip Shields LB 88658 15 75 2 9187 036 042 LB 88663 17 75 3 9187 048 060 LB 88664 19 75 3 9187 1 Remove the access panels If necessary remove the corrugated padding between the blower and coil as sembly before operating the unit Remove the drip shields from the foam pads on the top of the
18. pan To remove rail remove screw from rail at back of unit and at cabinet sup port rail Remove downflow rail then replace screws Also seal around the exiting drain pipe liquid and suction lines to prevent infiltration of humid air 11 Flip access door Knock out the portion of door for the drain pipes and attach to the cabinet with screw provided Replace access door on the unit 12 Set unit so it is sloped towards the drain pan 1 4 Gmm Connect return and supply air plenums as required using sheet metal screws 13 If hanging the unit it must be supported along the entire length of the cabinet If using chain or strap use a piece of angle iron or sheet metal attached to the unit either above or below so that the full length of the cabinet is supported Use securing screws no longer than 1 2 13mm to avoid damage to coil or filter See figure 16 Connect return and supply air plenums as required using sheet metal Screws F Condensate Drain A 5 127mm section of PVC pipe is provided with the unit Cut the pipe in half and use to route the auxiliary and main drains Connect main condensate drain and route downward to an open drain or sump Do not connect drain to a closed waste system Refer to figure 20 for typical condensate trap configura tion Page 24 SPACE OVERFLOW DRAIN LINE ALWAYS RUN AN OVERFLOW DRAIN LINE IF NOT POSSIBLE TO ROUTE OVERFLOW DRAIN LINE INSTALL LOW VOLTAGE OVERFLOW SWITCH KIT WIRE
19. starts and the electric heat will stage on based on sequencer timing D Safety or Emergency Shutdown Turn off unit power at circuit breaker E Extended Period Shutdown Turn off thermostat or set to UNOCCUPIED mode Turn off power to unit All access panels and covers must be in place and secured The condensate assembly should be clean and dry for ex tended period shutdown VI TYPICAL OPERATING CHARACTERISTICS A Blower Operation and Adjustment NOTE The following is a generalized procedure and does not apply to all thermostat controls 1 Blower operation is dependent on thermostat control system 2 Generally blower operation is set at thermostat subbase fan switch With fan switch in ON position blower oper ates continuously With fan switch in AUTO position blower cycles with demand 3 In all cases blower and entire unit will be off when the sys tem switch is in OFF position B External Static Pressure 1 Measure tap locations as shown in figure 22 STATIC PRESSURE TEST PPLY UNIT SHOWN IN UPFLOW POSITION MANOMETER RETURN FIGURE 22 2 Punch 1 4 6mm diameter hole in supply and return air plenums Insert manometer hose flush with inside edge of hole or insulation Seal around the hose with permagum Connect the zero end of the manometer to the discharge supply side of the system On ducted systems connect the other end of manometer to the return duc
20. to 24VAC transformer mounted in the control box The transformer supplies power to the control circuits in the indoor and out door unit Transformers on all CBX32M 1 units are rated at Transformers CBX32M 018 through 042 2 units are rated at 7OVA and CBX32M 048 060 2 units are rated at 40VA 208 240VAC single phase transformers use two primary voltage taps as shown in figure 3 208 240 VOLT TRANSFORMER PRIMARY SECONDARY ORANGE 240 VOLTS RED 208 VOLTS FIGURE 3 D Circuit Breaker CB8 1 units All transformers used in the CBX32M 1 series units are equipped with internal secondary voltage overcurrent protec tion Each transformer uses a circuit breaker CB8 located on the transformer The circuit breaker is connected in series with the blue secondary voltage wire and is rated 3 5 Amps E Transformer Fuse F1 2 units The transformer in all CBX32M 2 units is protected by an line fuse F1 The fuse is rated at 32 volts and 3 amps F Blower Relay K3 CBX32M units use a DPDT relay to energize the blower motor The relay coilis energized by blower demand from indoor thermostat When the coil is energized a set of N O contacts closes to energize the blower motor on cooling speed When de energized a set of N C contacts allows the optional electric heat relay to energize the blower on heating speed refer to unit wiring diagram G Blower Motor B3 CBX32M units use single phase direct
21. 0 39 46 41 50 60 97 100 19 Ibs Bue s 220 16 8 57 300 3 9 52 46 460 60 102 110 1 80A and 230 18 4 62 700 3 9 52 46 460 60 102 110 1 60A Circuit breaker 240 20 0 68 200 3 9 52 46 460 60 109 110 25 kW ECB29 25CB 28K40 3 208 18 8 64 100 3 9 42 31 31 445 445 445 120 125 19 105 3 50A Circuit breakers 220 21 0 71 700 3 9 48 35 35 50 50 50 122 125 230 23 0 78 300 3 9 48 35 35 50 50 50 122 125 240 25 0 85 300 3 9 48 35 35 50 50 50 135 150 30 kW ECB29 30CB 28K41 3 208 22 5 76 900 3 9 51 37 37 60 450 450 144 150 19 Ibs 3 60A Circuit breakers 220 25 2 86 000 39 56 42 42 60 60 60 144 150 230 27 5 94 000 39 56 42 42 60 60 60 144 150 240 30 0 102 40 39 56 42 42 60 60 60 161 175 0 NOTE Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps 1 Electric heater capacity only does not include additional blower motor heat capacity 2 Amps shown are for blower motor only 3 Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at least 167 F 75 C 4 Bold text indicates that the circuit breaker on CB circuit breaker models must be replaced with size noted See table on page 2 5 All 575v electric heaters are used with 460V air handler un
22. 0 335 825 390 275 650 310 220 30 75 910 430 325 800 380 265 635 300 215 40 100 850 400 310 745 355 250 590 280 205 50 125 780 370 295 685 320 235 535 255 190 60 150 705 330 280 605 285 220 470 220 175 70 175 615 290 265 520 245 200 395 185 165 75 185 565 265 255 475 225 195 350 165 155 NOTE All air data is measured external to unit with air filter place with bottom retum air Electric heaters have no appreciable air resistance CBX32M 030 BLOWER PERFORMANCE 208 230v External Static Air Volume and Motor Watts at Specific Blower Taps Pressure High Medium Low in w g Pa cfm L s Watts cfm L s Watts cfm L s Watts 00 490 315 05 505 310 10 515 300 15 510 295 20 505 285 25 485 270 30 460 255 40 390 220 50 290 190 60 155 160 NOTE All air data is measured external to unit with air filter in place with bottom retum air Electric heaters have no appreciable air resistance CBX32M 036 BLOWER PERFORMANCE 208 230v External Static Air Volume and Motor Watts at Specific Blower Taps Pressure High Medium Low in w g Pa cfm L s Watts cfm L s Watts cfm L s Watts 00 0 1525 720 505 1120 530 390 915 430 335 05 10 1520 720 495 1150 540 385 965 455 330 10 25 1510 715 480 1170 550 380 1005 475 325 15 35 1495 705 470 1180 560 375 1035 490 320 20 50 1475 695 455 1190 560 370 1055 495 320 25 60 1450 685 440 1185 560 360 1060 500 310 30 75 1415 670 430 1175 555 350 1050 495 300 40 100 1335 630 400 1135 535 325 1005 475 290 50 125 1230
23. 0A amp 1 60A Circuit Breaker 230 13 8 47 000 24 29 42 30 60 74 80 240 150 51200 24 29 42 30 60 81 90 20 kW ECB29 20CB 11L31 2 208 15 0 51 200 24 45 41 45 60 95 100 19 Ibs 1 50A amp 1 60A Circuit Breaker ECB29EH 20CB 91K70 220 16 8 57 00 24 50 46 50 60 99 100 1 50A amp 1 60A Circuit Breaker 230 18 4 62 700 24 50 46 50 60 99 100 240 20 0 68 200 24 50 46 50 60 107 110 THREE PHASE ECB29 8 28K42 1 208 60 120 500 24 24 25 Hs a Terminal Block 220 6 7 22 980 24 27 30 ake 230 7 3 25 100 24 27 30 lA 240 8 0 27 300 24 27 30 25s ade 29 10 28K43 1 208 7 5 25600 24 29 m E Terminal Block 220 8 4 28 700 24 33 35 HS d 230 92 131 400 24 33 35 pm EUR 240 10 0 34 100 24 33 35 ae ECB29 10 28K47 1 440 84 2870 m 32i 3 20A Fuses 460 92 31400 nm 480 10 0 134 100 oben T ms Bei SA ECB29 15CB 28 44 1 208 11 3 138 400 24 42 445 Kyo Circuit breaker 220 12 6 43 000 24 48 50 ma uu 230 13 5 47 000 24 48 50 m um 240 15 0 51 200 24 48 50 ide fos 29 15 28 48 1 440 126 43000 duis 3 25A Fuses 460
24. 1 72 44 45 45A Circuit breaker 230 7 3 25 100 1 72 44 45 Tus 240 8 0 27 300 1 72 44 45 9 kW ECB29 9CB 10L11 2 208 6 8 25 600 1 72 43 445 5 Ibs 50A Circuit breaker ECB29EH 9CB 91 67 220 7 6 28 700 1 72 49 50 50A Circuit breaker 230 8 3 31 400 1 72 49 50 rum mer NUS 240 9 0 34 100 1 7 49 50 TEN Bis ES 10 kw ECB29 10 28K35 2 208 7 5 25 600 1 72 47 50 ose 6 lbs Terminal Block ECB29 10CB 28K36 220 8 4 28 700 1 72 54 60 60A Circuit breaker 230 9 2 31 400 1 72 54 60 mur MUS 240 10 0 34 100 1 72 54 60 12 5 kW ECB29 12 5CB 28K37 2 208 9 4 32 000 1 72 21 31 25 445 60 60 10 Ibs 1 25A amp 1 50A Circuit breaker ECB29EH 12 5CB 91K68 220 10 5 35 800 1 72 24 35 25 50 61 70 1 25 amp 1 50A Circuit breaker 230 11 5 39 200 1 72 24 35 25 50 61 70 240 12 5 42 600 1 72 24 35 25 50 67 70 15 kW ECB29 15CB 28K38 2 208 11 3 38 400 1 72 24 37 425 450 71 80 12 Ibs 1 30A amp 1 60A Circuit Breaker ECB29EH 15CB 91 69 220 12 6 43 000 1 72 28 42 30 60 72 80 1 30A amp 1 60A Circuit Breaker 230 13 8 47 000 1 72 28 42 30 60 72 80 240 15 0 51 200 1 72 28 42 30 60 80 80 20 kW ECB29 20CB 11L31 208 15 0 51 200 1 72 44 41 445 60 95 100 19 Ibs 1 50A amp 1 60A Circuit Breaker ECB2
25. 10 0 34 100 1 73 54 60 12 5 kW ECB29 12 5CB 28K37 2 208 9 4 32 000 1 73 21 31 25 445 60 60 10 Ibs 1 25A and 1 50A Circuit breaker 220 10 5 35 800 1 73 24 35 25 50 61 60 ECB29EH 12 5CB 91K68 230 11 5 39 200 1 73 24 35 25 50 61 60 1 25A and 1 50A Circuit break er 240 12 5 42 600 1 73 24 35 25 50 67 70 15 kW ECB29 15CB 28K38 2 208 11 3 38 400 1 73 24 37 425 450 71 80 12 Ibs 1 30A and 1 60A Circuit breaker 220 12 6 43 000 1 73 28 42 30 60 72 80 ECB29EH 15CB 91K69 230 13 8 47 000 1 73 28 42 60 72 80 1 30A and 1 60A Circuit break er 240 15 0 51 200 1 73 28 42 30 60 80 80 NOTE Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps 1 Electric heater capacity only does not include additional blower motor heat capacity Amps shown are for blower motor only 3 Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at least 167 F 75 C Bold text indicates that the circuit breaker on CB circuit breaker models must be replaced with size noted See table on page 2 5 All 575v electric heaters are used with 460V air handler units A 575V to 460V Step down transformer for the air handler unit is furnished with all 575V electric heaters 6 Blower motor is rated at 460V 7 HACR type circuit breaker or fuse Page 14 ELECTRIC HEAT DATA CBX
26. 15 0 15 1850 585 1750 510 0 20 1825 575 1720 500 0 25 1790 560 1685 490 0 30 1745 545 1645 480 0 40 1625 505 1530 450 0 50 1465 470 1380 420 0 60 1270 425 1195 385 0 70 1030 385 975 350 0 75 755 340 720 320 NOTE All air data is measured external to unit with air filter in place with bottom retum air Electric heaters have no appreciable air resistance CBX32M 060 BLOWER PERFORMANCE 208 230v External Static Air Volume and Motor Watts at Specific Blower Taps Pressure High Medium Low in w g Pa cfm Lis Watts cfm Lis Watts cfm Lis Watts 00 0 2115 995 780 2025 955 670 1775 835 585 05 10 2100 990 770 2010 950 665 1775 835 590 10 25 2085 985 765 1995 940 655 1770 835 580 15 35 2060 970 750 1975 930 645 1760 830 570 20 50 2030 960 740 1950 920 635 1745 825 560 25 60 2000 945 730 1915 905 625 1725 815 550 30 75 1960 925 715 1880 885 610 1695 800 535 40 100 1870 880 685 1795 845 580 1630 770 505 50 125 1755 830 655 1690 795 545 1540 725 475 60 150 1620 765 625 1560 735 515 1425 675 440 70 175 1465 690 590 1415 670 480 1295 610 410 80 200 1290 610 560 1250 590 445 1140 535 375 85 210 1195 565 545 1160 550 425 1050 495 360 NOTE All air data is measured external to unit with air filter in place with bottom retum air Electric heaters have no appreciable air resistance CBX32M 060 BLOWER PERFORMANCE 460V External Static Air Volume amp Motor Watts at Specific Blower Taps Pressure in w g High Low cfm Watts cfm Watts 0 2140 795 1965 710
27. 32M 036 Model Number No Input 2 Blower 3 Minimum 5 Maximum Single Point of Motor Circuit Overcurrent Power Source Stages Full Ampacity Protection Volts kw 994 Ckt1 2 3 Minimum 5 Maximum p 1 2 Circuit Overcurrent Ampacitv Protection SINGLE PHASE 4 kW ECB29 4 55W87 1 208 3 0 10 250 1 72 20 420 4 Ibs Terminal Block 4 mwa __ ECB29 4CB 55W88 220 3 4 11 450 1 72 23 25 30A Circuit breaker 230 3 7 12 550 1 72 23 425 ae 240 4 0 113 650 1 72 23 425 oes 5 kw 29 5 28 31 1 208 3 8 12 800 1 72 25 425 sees 4 Ibs Terminal Block ECB29 5CB 28K32 220 4 2 14 300 1 72 28 30 30A Circuit breaker 230 4 6 15 700 1 72 28 30 sas m me 240 5 0 17 100 1 72 28 30 6 kw 29 6 47122 1 208 4 5 15 400 1 72 30 430 4 Ibs Terminal Block ECB29 6CB 47123 220 5 0 17 100 1 72 33 35 35A Circuit breaker 230 5 5 18 800 1 72 33 35 nm 240 6 0 20 500 1 72 33 35 8 kW ECB29 8 28K33 1 208 6 0 20 500 1 72 38 440 5 Ibs Terminal Block ECB29 8CB 28K34 220 6 7 22 900
28. 51 VIEW FIGURE 14 Cut an opening appropriately sized for combustible base Base dimensions are shown in figure 14 After opening has been cut set the additive base into opening Connect outlet air plenum to the additive base Set the unit on the additive base so flanges of the unit drop into the base opening and seal against the insulation strips Seal around the insulation strips with permagum The unit is now locked in place Install return air plenum and secure with sheet metal screws D Horizontal Right Hand Discharge Application 1 Discard drip shields if applicable The shields are used for downflow applications only 2 Place blower coil on its right side 3 No further adjustment is necessary Set unit so it is sloped towards the drain pan 1 4 6mm See figure 15 NOTE For horizontal applications a secondary drain pan is recommended Refer to local codes NOTE For horizontal applications in high humidity areas remove the downflow rail closest to the drain pan To remove rail remove screw from rail at back of unit and at cabinet sup port rail Remove downflow rail then replace screws Also seal around the exiting drain pipe liquid and suction lines to prevent infiltration of humid air RIGHT HAND DISCHARGE CONFIGURATION UPFLOW DOWNFLOW HORIZONTAL DRAIN PAN ORIP SHIELD pro mi FIGURE 15 HORIZONTA DRAIN PAN DOWNFLOW RAIL 3 If hanging the unit it must
29. 55 385 875 415 310 795 375 260 75 185 875 415 370 780 370 295 700 330 250 NOTE All air data is measured external to unit with air filter in place with bottom retum air Electric heaters have no appreciable air resistance CBX32M 048 BLOWER PERFORMANCE 208 230v External Static Air Volume and Motor Watts at Specific Blower Taps Pressure High Medium Low in w g Pa cfm Lis Watts cfm Lis Watts cfm Lis Watts 00 0 1910 900 590 1785 845 520 1475 695 430 05 10 1895 895 585 1770 835 515 1480 700 430 10 25 1870 880 580 1750 825 510 1475 695 425 15 35 1840 865 570 1720 810 500 1465 690 420 20 50 1800 850 565 1685 795 490 1445 680 410 25 60 1755 830 550 1645 775 480 1415 670 405 130 75 1700 805 540 1600 755 465 1380 650 395 40 100 1580 745 515 1485 700 440 1290 610 370 150 125 1425 675 485 1350 635 410 1170 550 345 60 150 1250 590 450 1190 560 380 1020 480 320 70 175 1045 495 415 1000 470 350 840 395 295 75 185 930 440 400 900 425 335 740 350 280 NOTE All air data is measured external to unit with air filter in place with bottom retum air Electric heaters have no appreciable air resistance Page 4 CBX32M 048 BLOWER PERFORMANCE 460V External Static Air Volume amp Motor Watts at Specific Blower Taps Pressure in w g High Low cfm Watts cfm Watts 0 1870 610 1775 530 0 05 1875 610 1775 530 0 10 1870 590 1765 5
30. 9EH 20CB 91K70 220 16 8 57 300 1 72 49 46 50 60 97 100 1 50 amp 1 60 Circuit Breaker 230 18 4 62 700 1 72 49 46 50 60 97 100 240 20 0 68 200 1 72 49 46 50 60 106 110 5 8 kW ECB29 8 28K42 1 208 6 0 20 500 1 72 23 25 5 Ibs Terminal Block 220 6 7 22 900 1 72 26 pa 30 2 a __ 230 7 3 25 100 1 72 26 30 240 8 0 27 300 1 72 26 30 10 kw 29 10 28 43 1 208 7 5 25 600 1 72 28 30 6 lbs Terminal Block 220 84 28 700 1 72 32 35 mE _ 230 9 2 31 400 1 72 32 35 240 10 0 34 100 1 72 32 35 29 10 28K47 1 440 8 4 28 700 1 1 16 20 3 20 Fuses 460 92 31400 11 16 20 M 480 10 0 34 100 1 1 16 20 15 ELECTRIC HEAT DATA CBX32M 036 Continued Model Number No Input 2 Blower 3 Minimum 5 Maximum Single Point of Motor Circuit Overcurrent Power Source Stages Full Ampacity Protection Volts 19984 cet Ckt1 Ckt2 3 Minimum 5 Maximum ps nimi 1 2 Circuit Overcurrent Ampacity Protection THREE PHASE ECB29 15CB 28K44 1 208 113 38400 172 41 445 tra F URSUA Circuit breaker 220 12 6 43 000 172 47 50 KEN m 230 13 5 47 000 1 72 47 50 um T
31. Circuit breaker 230 8 3 31 400 2 4 50 50 aoe ae 240 9 0 34 100 2 4 50 50 10 kw 29 10 28 35 2 208 7 5 25 600 2 4 48 450 6 lbs Terminal Block ECB29 10CB 28K36 220 8 4 28 700 2 4 55 60 60A Circuit breaker 230 9 2 31 400 2 4 55 60 e m 240 10 0 34 100 2 4 55 60 16 ELECTRIC HEAT DATA CBX32M 042 Continued Model Number Input 2 Blower 3 Minimum 5 Maximum Single Point of Motor Circuit Overcurrent Power Source Stages Full Ampacity Protection Volts kw Btuh 4080 Ckt 1 Ckt2 Minimum 5 Maximum ps nimi 1 2 Circuit Overcurrent Ampacity Protection SINGLE PHASE 12 5 kW ECB29 12 5CB 28K37 2 208 9 4 32000 24 22 31 25 445 61 70 10 Ibs 1 25A amp 1 50A Circuit breaker ECB29EH 12 5 91K68 220 10 5 35 800 24 25 35 25 50 63 70 1 25A amp 1 50A Circuit breaker 230 11 5 39 200 24 25 35 25 50 63 70 240 12 5 42 601 24 25 35 25 50 68 70 15 kW ECB29 15CB 28 38 2 208 11 3 38 400 24 26 37 30 450 72 80 12 Ibs 1 30A amp 1 60A Circuit Breaker ECB29EH 15CB 91K69 220 12 6 43 0001 24 29 42 30 60 74 80 1 3
32. E REFER TO UNIT NAMEPLATE FOR MINIMUM CIRCUIT AMPACITY AND HE2 2 6 MAXIMUM OVER PROTECTION SIZE EQUIPMENT GROUND IS LOCATED IN INDOOR UNIT SKW ONE ELEMENT LENNOX me WIRING DIAGRA HEATING UNITS ELECTRIC 29 2 5 5 8 ECB29 5CB 8CB Supersedes Form New Form 531 61 6W 1995 Lennox Industries Inc Litho U S A Page 29 DESCRIPTION COMPONENT CIRCUIT BREAKER ELECT HEAT ELEMENT ELECTRIC HEAT 1 NOTE USE COPPER CONDUCTORS ONLY REFER TO UNIT NAMEPLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVERCURRENT PROTECTION SIZE CONNECT POWER WIRES FROM UNIT LABELED L1 AND L2 TO TB2 TERMINAL STRIP ON HEATER PLATE EQUIPMENT GROUND IS LOCATED IN INDOOR UNIT A A CIRCUIT 1 L1 L1 L2 2 4 CB1 ECB29 2 5 4 5 6KW ECB29 4CB 5CB UNITS 6CB UNITS EQUIPMENT GROUND A LINE VOLTAGE FIELD INSTALLED HEATING ELECTRIC ECB29 2 5 5 6 5CB 6CB 2P ECB29 4 4CB P pct EET 0809 New Form No Litho U S A 29 2 5 5 5CB 8 8CB 208 230 SINGLE PHASE SEQUENCE OF OPERATION 1 When there is a call for heat W1 of the thermostat ener 3 Assuming the N C primary S15 and secondary S20 limit gizes the electric heat relay K32 with 24VAC switches are closed electric heat element HE1 is energized 2 When K32 1 closes the blower is energized on heat 4 When K32 2 closes assu
33. IMIT S20 N TERMINAL BLOCK TB2 PRIMARY LIMIT S15 ELECTRIC HEAT amp SECONDARY LIMIT S20 SEQUENCER RELAY K32 CIRCUIT BREAKER CB2 FIGURE 7 ECB29 20CB 208 230 SINGLE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT ECTRIC HEAT ELEMENT HE4 ELECTRIC HEAT ELECTRIC HEAT ELECTRIC HEAT lt ELEMENT HE3 VESTIBULE PANEL SEQUENCER RELAY 33 4 PRIMARY LIMIT S15 amp SECONDARY LIMIT S20 LECTRIC HEAT ELEMENT HE1 PRIMARY LIMIT S15 amp SECONDARY LIMIT S20 CIRCUIT BREAKER CB1 ELECTRIC HEAT SEQUENCER RELAY K32 ELECTRIC HEAT SEQUENCER RELAY K34 FIGURE 8 Page 11 ECB29 20CB 25CB 208 230 THREE PHASE ELECTRIC HEAT ECB29 25CB 30CB 208 230 SINGLE PHASE EE HE2 ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT 2 ELECTRIC HEAT ELEMENT HES A J CLEMENT THEA SEQUENCER RELAY K33 HE4 ELECTRIC HEAT VESTIBULE PANEL Die 5 ae ee S D PRIMARY LIMIT 515 gt N amp SECONDARY LIMIT S20 SS 25 SY k AN io AIS IRCUIT BREAKER ELECTRIC HEAT ELEMENT HE5 NG 524 j L 2 CIRCUIT BREAKER Re wx gt gt ELECTRIC HEA ZS RAY 2 ELECTRIC HEAT SEQUENCER RELAY K32 ELECTRIC HEAT ELECTRIC HEAT SEQUENCER RELAY K116 SEQUENCER RELAY K35 ELECTRIC HEAT T GB SEQUENCER RELAY K34 FIGURE 9 Page 12
34. KIT TO SHUT DOWN COMPRESSOR PER INSTRUCTIONS LENNOX X3169 CE COMPACT OVERFLOW SWITCH WITH 3 4 FEMALE SLIP INLET AND MALE ADAPTER TWO PART DESIGN FOR USE WHERE OBSTRUCTIONS PREVENT DIRECT THREADING AIR HANDLER DRAIN PAN N OVERFLOW DRAIN NOTE WHEN A AIR HANDLER 15 LOCATED ABOVE A FINISHED SPACE THE SECONDARY DRAIN PAN MUST HAVE A LARGER FOOTPRINT THAN THE AIR HANDLER CUT TO REQUIRED SECONDARY DRAIN PAN LENGTH Ili O ll PROVIDED PIPE NIPPLE 2 WHEN A COIL IS LOCATED ABOVE A FINISHED SPACE A 3 4 19 1MM SECONDARY DRAIN LINE MUST BE CONNECTED TO SECONDARY DRAIN PAN SIDE VIEW OR CONNECTED TO THE OVERFLOW DRAIN OUTLET OF THE AIR HANDLER DRAIN PAN TRAPS MUST BE DEEP ENOUGH TO OFFSET MAXIMUM STATIC DIFFERENCES GENERALLY TWO INCHES 51MM A 1 LENNOX P TRAP 49P66 REQUIRES A LARGER INSTALLATION SPACE THAN THE J TRAP 91P90 2 PIPE NIPPLE PROVIDED IN BAG ASSEMBLY SCH 80 3 4 1 D X 5 34K7401 1 CUT THE PIPE IN HALF AND USE IT TO ROUTE THE MAIN DRAIN FIGURE 20 It is recommended that the auxiliary drain be connected toa 3 drain line for all units If auxiliary drain is not connected it must be plugged with provided cap For downflow units the auxiliary drain MUST be connected androutedtoa 4 drain See figure 21 forauxiliary and main drain locations 5 LEFT HAND UPFLOW O
35. LEMENT ELECTRIC HEAT ELEMENT ELECTRIC HEAT RELAY SEQUENCER ELECTRIC HEAT RELAY SEQUENCER ELECTRIC HEAT RELAY SEQUENCER ELECTRIC HEAT RELAY SEQUENCER ELECTRIC HEAT RELAY SEQUENCER ELECTRIC HEAT R 0 520 TSWITCH LIMIT SECONDARY L2 EQUIPMENT GROUND REFER TO UNIT NAMEPLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVER PROTECTION SIZE NOTE USE COPPER CONDUCTORS ONLY LINE VOLTAGE FIELD INSTALLED 58 DENOTES OPTIONAL COMPONENTS LENNOX S WIRING DIAGRAM HEATING UNITS ELECTRIC ECB29 25CB 30CB 2 P New Form No 532 528W Litho U S A Supersedes Form 1997 Lennox Industries Inc G ECB29 25CB 30CB 208 230V SINGLE PHASE SEQUENCE OF OPERATION FIRST STAGE HEAT 1 When there is a call for heat W1 of the thermostat en ergizes the electric heat relays K32 and K34 with 24VAC 2 When K32 1 closes the blower is energized on heat ing speed and economizer heat relay K43 is energized see 208 230VAC CB schematic 3 When K32 2 closes assuming the N C primary S15 and secondary S20 limit switches are closed electric heat element HE1 is energized 4 When K34 2 closes assuming the N C primary S15 and secondary S20 limit switches are closed electric heat element HE2 is energized SECOND STAGE HEAT remove jumper between W2 and R 5 When K34 1 closes the unit is ready for a second stage heat demand W2 of the thermostat sends a second stage heat demand energiz
36. NG DIAGRAMS AND SEQUENCE OF OPERATIONS FIELD WIRING FOR ECB SERIES UNITS WITHOUT CIRCUIT BREAKERS CIRCUIT 3 A cas A LI tl 2a Ai a EE CIRCUIT A FIELD WIRING FOR ECB SERIES UNITS WITH CIRCUIT BREAKERS CIRCUIT 2 CIRCUIT A LI Hw Li T vui ENT nt gd l1 EQUIPMENT Ec EQUIPMENT qr 5 9906 A EQUIPMENT GROUND LOCATED IN INDOOR UNIT POWER WIRES FROM VOLTAGE UNITS AND LI L2 LS ON A L3 IS NOT PRESENT ON P ELECTRIC HEATERS A CONNECT HEATER LABELED tad 0 THE NUMBER OF CIRCUITS VARY ACCORDING UNITS TO TB2 TERMINAL STRIP IN INDOOR UNIT TO HEATER MODEL REFER TO FAN COIL NAMEPLATE FOR ACTUAL NUMBER EMPLOYED A FACTORY BLOWER SPEED TAP SELECTION ON UNIT FOR BLOWER SPEED INFORMATION Aes NEC CEC CLASS 2 3VA A VOLTAGE ONLY AA USE COPPER CONDUCTORS ONLY REFER TO UNIT RATING PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVERCURRENT SIZE L3 CONNECTION USED ON Y ELECTRIC HEATERS ONLY 5 SPD MOTO RTE EP UTOR MO EEE WAHR THIS WIRE USED ON T VOLTAGE UNITS ONLY New Form No LINE VOLTAGE FIELD WIRING CLASS II VOLTAGE FIELD WIRING 534 300W Ina Li the U S A A CBX32M 208 230V SINGLE PHASE SEQUENCE OF OPERATION 1 Line voltage is routed to transformer T1 and blower motor B3 2 T1 supplies 24VAC to terminal strip TB1 which supplies 24VAC to the indoor thermostat and e
37. R RIGHT HAND DISCHARGE DOWNFLOW DISCHARGE 6 T MAIN DRAIN ON RIGHT AUXILIARV DRAIN ON LEFT FIGURE 21 The following practices are recommended to ensure con densate removal 1 Drain piping should not be smaller than the drain con nections at drain pan 2 A trap must be installed in the main drain line Page 25 VENT MUST EXTEND ABOVE HEIGHT OF COIL DRAIN PAN BV TWO INCHES 51MM VENT CLEAN OUT PRESS IN DO NOT GLUE 1 X 3 4 X 3 4 REDUCING TEE WITH PLUG LENNOX P TRAP 49P66 J TRAP 91P90 OR ANY PVC SCH 40 P OR J TRAP 3 4 TRAP DEPTH TO APPROVED DRAIN DRAIN LINE SHOULD SLOPE A MINIMUM OF ONE INCH PER 10 FEET 25MM PER 3 METERS FOR NEGATIVE PRESSURE COILS BLOWER AFTER COIL TRAPS ARE REQUIRED ON ALL DRAIN LINES CONNECTED TO COIL The trap must be deep enough to offset the difference in stat ic pressure between drain pan and atmosphere Generally two inches is satisfactory for medium static applications Horizontal runs must be sloped 1 25mm per 10 feet 3 1m of drain line to offset friction An open vent in drain line will sometimes be required due to line length friction and static pressure Drains should be constructed in a manner to facilitate future cleaning and not to interfere with filter access See figure 20 Auxiliary drain should run to an area where homeowner will notice it draining Refer to local codes
38. R TO UNIT WIRING DIAGRAM INSERT WIRE UNTIL IT IS SECURELY IN PLACE VII MAINTENANCE At the beginning of each heating cooling season the system should be checked as follows A Filters NOTE Filter access panel must be in place during unit op eration Excessive warm air entering the unit may result in water blow off problems TABLE 4 CBX32M FILTER SIZES Unit Filter Size 15 X 20 381mm X 508mm 20 X 20 508mm X 508mm 20 X 24 508mm X 610mm To remove filter loosen the thumbscrews holding the filter panel in place Slide filter out of the guides on either side of cabinet insert new filter and replace panel Some models come witha spacer so standard size filters can be used Fil ters should be inspected monthly and must be replaced when dirty to ensure proper blower coil operation See table 4 for replacement filter sizes or see the sticker lo cated on the filter access door specifying the size of the standard throw away filter which is used with the unit B Supply Air Blower 1 Check and clean blower wheel 2 Motors are prelubricated for extended life no further lu brication is required C Electrical 1 Check all wiring for loose connections 2 Check circuit breaker located in unit control box 3 Check for correct voltage at unit unit operating 4 Check amp draw on blower motor 5 Check to see that heat if applicable is operating CBX32M 048 060 Page 27 VIII WIRI
39. TECTION SIZE 7 NOTE USE 60 AMP BREAKER ON 29 15 UNITS LENNOX 19 nc WIRING DIAGRAM USE DIAGRAM FOR THE HEATING UNITS ELECTRIC ECB29 5 8 amp 10 1Y NOTE USE COPPER CONDUCTORS ONLY CIRCUIT ECB29 8 10 2 Y 182 E TOW 29 15 2 HEATERS ONLY EQUIPMENT GROUND CBI USED ON Supersedes Form No New Form No LES ITE IN INDOOR Pee Ben 632 570 1997 Lennox Industries Inc Litho U S A H ECB29 5 8 10 15CB 208 230V THREE PHASE SEQUENCE OF OPERATION 1 When there is a call for heat W1 of the thermostat en see 208 230VAC CB schematic ergizes the electric heat relays K32 K33 and K34 with 3 When K32 2 K33 2 and K34 1 closes assuming the N C primary S15 and secondary S20 limit switches are 2 When K32 1 and or K33 1 closes the blower is energized on closed electric heat elements HE1 HE2 and HE3 are heating speed and economizer heat relay K43 is energized energized Page 36 COMPONENT ARRANGEMENT DESCRIPTION CIRCUIT BREAKERS T COMPONENT z CIRCUIT BREAKER ELECTRIC HEAT H JEN R 5 6 ELEMENT ELECTRIC HEAT P2 IK32 1 2 RELAY SEQUENCER ELECTRIC HEAT IK33 1 2 RELAY SEQUENCER ELECTRIC HEAT KS5 1 2 RELAY SEQUENCER ELECTRIC HEAT SIS SWITCH LIMIT PRIMARY AUTO A CIRCUIT 2 CIRCUIT EQUIPMENT GROUND NOTE USE COPPER CONDUCTORS ONLY LINE VOLTAGE FIELD INSTALLED DENOTES OPTIONAL COMPONENTS
40. ame For single phase applications one elementis used per stage Each stage is energized independently by the corresponding relay located on the electric heat vesti bule panel All three phase heating elements are ar ranged in a three phase delta Once energized heat transfer is instantaneous High temperature protec tion is provided by primary and secondary high tem perature limits ECB29 2 5 5 5CB 208 230 SINGLE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT ELECTRIC HEAT VESTIBULE PANEL ELEMENT HE1 PRIMARY LIMIT S15 amp SECONDARY LIMIT S20 TERMINAL BLOCK TB2 ELECTRIC HEAT SEQUENCER RELAY K32 CIRCUIT BREAKER CB1 FIGURE 5 ECB29 8 8CB 10 10CB 208 230 SINGLE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT ELECTRIC HEAT VESTIBULE PANEL ELECTRIC HEAT ELEMENT HE2 ELECTRIC HEAT ELEMENT HE1 PRIMARY LIMIT S15 amp SECONDARY LIMIT S20 TERMINAL BLOCK TB2 ELECTRIC HEAT ELECTRIC HEAT SEQUENCER RELAY K33 SEQUENCER RELAY K32 FIGURE 6 Page 10 ECB29 8 10 208 230 THREE PHASE ECB29 12 5CB 15CB 208 230 SINGLE amp THREE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT ELECTRIC HEAT ELEMENT ELECTRIC HEAT ga ELECTRIC HEAT 7 ELECTRIC HEAT ELEMENT HE2 VESTIBULE PANEL SEQUENCER RELAY K33 CIRCUIT BREAKER CB1 ELECTRIC HEAT ELEMENT HE1 PRIMARY LIMIT S15 aug K gt amp SECONDARY L
41. aracteristics 26 VII 27 VIII Wiring Diagrams and Operating Sequence 28 General CBX32M are high efficiency blower coils designed for R410A applications only Several models are available in sizes rang ing from 1 1 2 through 5 tons 5 3 through 17 6 kW The CBX32M units are multi position upflow downflow or horizontal The units come with a factory installed check and expansion valve for cooling or heat pump applications CBX32M series units are designed to be matched with the 12 and 13 SEER air conditioner and heat pump lines While these blower coil units are designed to be primarily matched with these outdoor units they may be matched with other air conditioners or heat pumps as noted in the rating information ECB29 electric heat in several voltages and kW sizes can be field installed in the CBX32M cabinets Information contained in this manual is intended for use by quali fied HVAC service technicians only All specifications are subject to change Procedures outlined in this manual are presented as a recommendation only and do not supersede or replace local or state codes AWARNING Electric shock hazard Can cause injury or death Before attempting to perform any service or maintenance turn the electrical power to unit OFF at disconnect switch es Unit may have multiple power supplies 2011 Lennox Industries Inc Litho U S A Specifica
42. be supported along the entire length of the cabinet If using chain or strap use a piece of angle iron or sheet metal attached to the unit either above or below so that the full length of the cabinet is supported Use securing screws no longer than 1 2 13mm to avoid damage to coil or filter See figure 16 Connect return and supply air plenums as required us ing sheet metal screws HANGING HORIZONTAL UNIT Electrical Inlet Clearance 4 in 102 mm 1 2 13mm Screws max ANGLE IRON OR SHEET METAL END VIEW FRONT VIEW FIGURE 16 Page 23 A CAUTION Danger of equipment damage and personal injurv Take care when removing coil assembly from unit installed in right or left hand applications Coil may tip into drain pan once clear of cabinet Sup port coil when removing E Horizontal Left Hand Discharge Application NOTE For horizontal applications a secondary drain pan is recommended Refer to local codes 1 Discard drip shields if applicable The shields are used for downflow applications only 2 Pull coil assembly from unit Pull off the horizontal drain pan 3 Remove drain plugs from back drain holes on horizontal drain pan and re install them on front holes 4 Rotate drain pan 180 front to back and install it on the op posite side of coil 5 Remove screws from top cap Remove horizontal drip shield screw located in the center of the back coil end seal See figure 17 6 Rotate horizonta
43. d economizer heat relay K43 is energized see 208 230VAC CB schematic 3 When K32 2 closes assuming the N C primary 515 and secondary S20 limit switches are closed electric heat element HE2 is energized SECOND STAGE HEAT remove jumper between W2 and R 4 When K33 1 closes the unit is ready for a second stage heat demand When K33 2 closes assuming the N C primary 815 and secondary S20 limit switches are closed electric heat element HE1 is energized 5 W2 of the thermostat sends a second stage heat de mand energizing electric heat relay K34 with 24VAC 6 When K34 1 closes assuming the N C primary S15 and secondary S20 limit switches are closed heat ing element HE3 is energized K34 1 closes until sec ond stage demand is satisfied Page 33 COMPONENT ARRANGEMENT K35 QN 26 4 7 COMPONENT A REFER TO UNIT 22 JCIRCULT BREAKER ELECTRIC HEAT REFER TO UNIT ELEMENT ELECTRIC HEAT MINI MUMYCIRGUIT 62 PLUG ELECTRIC HEAT MAXIMUM OVE PROTECTION SIZE NOTE USE COPPER CONDUCTORS ONLY R IkK33 1 2 RELAY SEQUENCER ELECTRIC HEAT K34 1 2JRELAV SEQUENCER ELECTRIC HEAT 515 JSWITCH LIMIT PRIMARV AUTO RESE S20 SECONDARY LINE VOLTAGE FIELD INSTALLED DENOTES OPTIONAL COMPONENTS L2 EQUIPMENT GROUND CIRCUIT 2 A Li CIRCUIT 78 CB2 L2 9 si EQUIPMEN GROUND LENNOX Sus
44. downflow and horizontal drain pans are provided and installed on CBX32M units The drain pans are made from fiberglass filled plastic The drain hole on horizontal pans are used for right hand discharge only and must be plugged when the unit is configured for left hand discharge IIl OPTIONAL ECB29 ELECTRIC HEAT A Matchups and Ratings The following tables show all approved CBX32M to ECB29 matchups and electrical ratings B Electric Heat Components ECB29 parts arrangement is shown in figures 5 through 9 All electric heat sections consist of components mounted to the elec tric heat vestibule panel and electric heating elements exposed directly to the air stream 208 230V electric heat sections may be equipped with circuit breakers The circuit breakers are des ignated by CB in the model number 460 and 575 volt electric heat sections are equipped with fuses The electric heat sec tion is connected to the unit via jack J2 which plugs into plug P2 of the unit 1 Electric Heat Sequencer Relays K32 K33 K34 K35 K116 K117 208 230 volt only Relays K32 K33 K34 K35 K116 and K117 are N O sequencer relays with a resistive element for a coil and a bi metal disk which actuates the contacts The relays are located on the electric heat vestibule panel and are ener gized by a 24V heating demand W1 W2 and W3 via jack plug 2 When energized the intemal resistance heats the bi metal disk causing the contacts to close When th
45. drive blower motors with a run capacitor Figure 4 shows the parts arrangement All motors use multiple speed taps Typically the high speed tap is energized during normal operation The horse power for each blower motor is listed in table 1 All units are factory wired for the minimum blower speed for heat pump and cooling applications with or without electric heat No field wiring is required The wiring diagrams show factory set blower speeds To run the blower on high speed refer to the installation instructions All speeds shown are minimums Do not change motor taps to operate at speeds lower than those shown in the tables Page 7 BLOWER ASSEMBLY BLOWER HOUSING BLOWER MOTOR CAPACITOR C4 BLOWER WHEEL FIGURE 4 H Blower Motor Capacitor C4 CBX32M series units use single phase direct drive motors with a run capacitor The run capacitor is mounted on the blower hous ing See figure 4 Capacitor ratings are shown in table 1 TABLE 1 CBX32M BLOWER RATINGS CAPACITOR UNIT HORSE POWER RATING 018 024 1 5 HP 7 5MFD 370V l Coil CBX32M series units have dual slab coils arranged in an A configuration Each coil has two or three rows of copper tubes fitted with ripple edged aluminum fins An expansion valve complete with screen feeds multiple parallel circuits through the coils The coil is designed to easily slide out of the unit cabinet J Plastic Drain Pans Both upflow
46. e relay is de energized the disk cools and the contacts open The relays energize different stages of heat as well as the blower The blower is always first on and last off 2 Primary S15 amp Secondary S20 Temperature Limits Both the primary 815 and secondary S20 limits are lo cated on the electric heat vestibule panel and are exposed directly to the air stream through an opening in the panel The high temperature limits are SPST N C limits with the primary limit being an auto reset limit and the secondary limit being a one time limit One time limits need to be replaced when opened The limits are factory set and are not adjustable 208 230 Volt Electric Heat Sections Each stage of the 208 230 electric heatis protected by a primary 815 and secondary S20 high temperature limit Both S15 and S20 are located in the same housing Each stage use the same style of limits Both the primary and secondary limits are wired in series with a heat element When either S15 or S20 opens the corresponding heat element is de energized All other heating elements remain energized The primary high temperature limit opens at 150 F 5 F 65 5 2 8 C on a temperature rise and automatically resets at 110 F 9 F 43 3 5 0 C on atemperature fall The secondary high temperature limit opens at 333 F 10 F 167 2 5 6 C ona temperature rise If the secondary limit opens it will need to be replaced Page 8 3 Circu
47. eaker 230 9 2 31 400 1 5 54 60 240 10 0 34 100 1 5 54 60 NOTE Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps 1 Electric heater capacity only does not include additional blower motor heat capacity Amps shown are for blower motor only 3 Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at least 167 F 75 C 4 Bold text indicates that the circuit breaker on CB circuit breaker models must be replaced with size noted See table on page 2 5 All 575v electric heaters are used with 460V air handler units A 575V to 460V Step down transformer for the air handler unit is furnished with all 575V electric heaters 6 Blower motor is rated at 460V 7 HACR type circuit breaker or fuse Page 13 Model Number Input 2 Blower 3 Minimum Maximum Single Point of Motor Circuit Overcurrent Power Source Stages Full Ampacity Protection Volts kw K929 Ckt1 Ckt2 Ckt 1 Ckt 2 2 Minimum Maximum ps ido Circuit Overcurrent Ampacity Protection SINGLE PHASE 4 kW ECB29 4 55W87 1 208 3 0 10 250 1 73 20 420 4 Ibs Terminal Block 4 29 4 55W88 220 3 4 11 450 1 73 23 25 30A Circuit breaker 230 37
48. ing the electric heat relays K33 and K116 with 24VAC 6 When K33 2 and K16 1close assuming primary S15 and secondary S20 limit switches are closed electric heat ele ments HE3 and HE6 are energized 7 K33 1 closes and remains closed until second stage heat demand is satisfied THIRD STAGE HEAT remove jumper between W3 and R if using third stage 8 When K32 3 closes the unit is ready for a third stage heat demand W3 if available of the thermostat sends a third stage heat demand energizing the electric heat relays K35 and K117 with 24VAC 9 When K35 2 and K117 1 close assuming the N C pri mary S15 and secondary S20 limit switches are closed electric heat elements HE4 and HE5 are ener gized K35 1 closes until third stage heat demand is satisfied Page 35 COMPONENT ARRANGEMENT K33 COMPONENT CBI JCIRCUIT BREAKER ELECTRIC HEAT HE 1 2 3 ELEMENT ELECTRIC HEAT IP2 PLUG ELECTRIC HEAT IK32 1 2 RELAY SEQUENCER ELECTRIC HEAT K33 1 2 RELAY SEQUENCER ELECTRIC HEAT CONNECT POWER WIRES FROM K34 1 IR HEATER LABLED LI L2 L3 TO TB2 TERMINAL STRIP 820 EWITCH LIMIT SECONDARY INSIDE INDOOR UNIT 2 TERMINAL BLOCK ELECTRIC HEAT LINE VOLTAGE FIELD INSTALLED CIRCUIT 9 DENOTES OPTIONAL COMPONENTS T quoe A ECB29 5 1 CBI LI T L2 T REFER TO UNIT CN L2 wy NAMEPLATE FOR EQUIPMENT 2 MINIMUM CIRCUIT GROUND 252 AMPACITY AND A MAXIMUM OVER PRO
49. ion Ckt 5 Minimum 5 Maximum 1 2 3 1 2 3 Circuit Overcurrent Ampacity Protection SINGLE PHASE 4 kW ECB29 4 55W87 1 208 3 0 10 250 24 21 425 m 4 lbs E E 220 3 4 11450 24 24 5425 30A Circuit breaker 230 3 7 12 550 2 4 DA meg AX 26261 scu see 240 4 0 13 650 24 24 wee 425 280 5 kW ECB29 5 28K31 1 208 38 12 800 24 26 30 m 255 est 220 4 2 14300 24 29 30 E 30A Circuit breaker 230 4 6 15 700 24 26 Les 30 eee ee cud 240 5 0 17 100 24 29 ate wem 30 280 6 kW ECB29 6 47L22 1 208 4 5 15400 24 30 430 ads 255 220 5 0 17 100 24 34 35 pus ed 35A Circuit breaker 230 5 5 18 800 2 4 35 240 6 0 20 500 24 34 35 8 kW 29 8 28K33 1 208 6 0 20 500 24 40 440 m or lbs ECL Cae 220 6 7 22900 24 45 45 ace 45A Circuit breaker 230 7 3 25 100 2 4 45 45 240 8 0 27300 24 45 45 ne Em des 9 kW 29 9 10111 2 208 6 8 23 100 24 44 445 m e MM ar e aiken 220 7 6 25 800 24 50 ws 50
50. it Breaker CB1 CB2 and CB3 208 230 volt only Line voltage connections are made to circuit breakers CB1 CB2 and CB3 in the electric heat sections with circuit break ers designated by CB in the model numbers Table 2 shows the amp rating for each circuit breaker used Single phase electric heat uses two pole circuit breakers while three phase electric heat uses three pole circuit breakers TABLE 2 ECB29 CIRCUIT BREAKERS ECB29 5CB 1 30 AMP P ECB29 8CB 1 P 0 AMP ECB29 10CB 1 P o IEEE 60 ECB29 15CB 1 Y 60 AMP emm me een ECB29 12 5CB 1 P 25 AMP ECB29 15CB 1 P 30 AMP ECB29 20CB 1 P 60 AMP ECB29 25CB 1 P 50 AMP 50 AMP ECB29 30CB 1 P 60 AMP NINE 4 Terminal Strip TB2 208 230 volt only For the electric heat sections without circuit breakers or fuses line voltage connections are made to terminal strip TB2 The terminal strip is located in the lower left corner of the electric heat vestibule panel Single phase electric heat uses two pole terminal strips while three phase electric heat uses three pole terminal strips 5 Heating Elements HE1 through HE6 Note Do not remove patch plate or insulation on units without circuit breakers Page 9 Heating elements are composed of helix wound bare nich rome wire exposed directly to the air stream The elements are supported by insulators mounted to the wire fr
51. its A 575V to 460V Step down transformer for the air handler unit is furnished with all 575V electric heaters 6 Blower motor is rated at 460V 7 HACR type circuit breaker or fuse Page 20 Model Number No of Input Blower Minimum Maximum Single Point Stages Motor Full Circuit Overcurrent Power Source Load Ampacity Protection Vols kW Btuh AMPS CK1CK2 CK 1 CK2 Minimum 5 Maximum Circuit Overcurrent Ampacity Protection THREE PHASE ECB29 8 28K42 1 208 6 0 20 500 3 9 25 25 com EE Terminal block 220 67 22 900 3 9 29 30 mu 230 7 3 25 100 3 9 29 30 FEE ive FIS 2401 8 0 27 300 3 9 29 30 m m ECB29 10 28K43 1 208 7 55 25 600 3 9 30 30 Zee ae Terminal Block 220 84 28 700 3 9 35 35 zx one 230 92 31 400 3 9 35 35 FEE Sms 240 10 0 34 100 3 9 35 35 Sms FE ECB29 10 28K47 1 440 84 28 700 19 17 20 zem E EFS 3 20A Fuses 4601 92 31 400 19 17 20 25 mm Ee 480 10 0 34 100 19 17 20 zs zum Fen ECB29 15CB 28K44 1 208 11 3 38 400 3 9 43 445 ae ae 50A Circuit breaker 220 12 6 43 000 3 9 50 50 Zee mm 230 13 5 47 000 3 9 50 50 Dem mm Ep 240 15 0 51 200 3 9 50 50 zex Ed 29 15 28 48 1 440 12 6 43 000 1 9 25
52. l blower motor heat capacity 2 Amps shown are for blower motor only 3 Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at least 167 F 75 C 4 Bold text indicates that the circuit breaker on CB circuit breaker models must be replaced with size noted See table on page 6 5 All 575v electric heaters are used with 460V air handler units A 575V to 460V Step down transformer for the air handler unit is furnished with all 575V electric heaters 6 Blower motor is rated at 460V 7 HACR type circuit breaker or fuse Page 21 IV CONFIGURATION MODIFICATIONS CBX32M units may be installed in the upflow downflow hori zontal right hand discharge or horizontal left hand discharge ori entation The units come from the factory ready for upflow or horizontal right hand discharge installation If the unit needs to be modi fied from its original configuration use the following proce dures All procedures assume the unit has not been modified from the factory A Disassembly of CBX32M Cabinet For tight applications where a modular design is an advan tage the CBX32M unit can be easily disassembled and re assembled By removing four screws the coil lifts off so the unit is in two parts To disassemble the CBX32M use the following pro cedure 1 Remove the two black screws located just above the seam in the top half of the unit 2 Remove the front
53. l drip shield 180 front to back 7 Remove plastic plug from left hole on coil front end seal and re install plug in back hole Re install horizontal drip shield screw in front coil end seal Drip shield should drain downward into horizontal drain pan inside coil 8 Rotate top cap 180 front to back and align with unused screw holes Holes must align with front and back coil end plates Note that top cap has a 45 bend on one side and 90 bend on the other The 90 bend must be on the same side as the horizontal drain pan See figures 17 and 18 NOTE Use extreme care when re installing screws into coil end plate engaging holes Coil damage could result by mis alignment FIELD MODIFICATION FOR LEFT HAND DISCHARGE zd CABINET SUPPORT COIL SHOWN IN UP FLOW POSITION FOR EASY CONVERSION FIGURE 17 BACK COIL END 90 BEND SEAL FIGURE 18 9 From the upflow position replace coil assembly Then flip cabinet 90 to the left and set into place Replace coil assembly Secure coil in place by bending down tab on cabinet support rail See figures 17 and 19 LEFT HAND DISCHARGE CONFIGURATION HORIZONTAL DRIP SHIELD SECURING TAB ON CABINET SUPPORT RAIL ic DOWNFLOW RAIL Pd FIGURE 19 Ne HORIZONTAL DRAIN PAN NOTE For horizontal applications in high humidity areas remove the downflow rail closest to the drain
54. lectric heat if used HEATING 3 When there is a call for heat W1 of the thermostat ener gizes the electric heat relay K32 covered in the electric heat section 4 Blower motor B3 is energized on heating speed after K32 1 closes see electric heat 5 Economizer relay K43 if used is energized after K32 1 closes see electric heat section 6 K43 1 closes energizing the economizer with 24VAC COOLING 7 When there is a call for cooling G of the thermostat ener gizes blower relay K3 and the economizer if used 8 2 closes energizing blower motor on cooling speed Page 28 COMPONENT ARRANGEMENT CB OR TB DESCRIPTION KW AMPS 5 50 CIRCUIT BREAKER ELECTRIC HEAT 8 50A ELEMENT ELECTRIC HEAT FOR USE WITH PLUG ELECTRIC HEAT CIRCUIT BREAKERS RELAY SEQUENCER ELECTRIC HEAT ONLY SWITCH LIMIT PRIMARY AUTO RESET LINE VOLTAGE FIELD INSTALLED SWITCH LIMIT SECONDARY i TERMINAL BLOCK UNIT DENOTES OPTIONAL COMPONENTS NOTE USE COPPER CONDUCTORS ONLY LI A u CIRCUIT SEN L2 2 12 L2 2 TB2 ECB29 5CB 8CB M 8 ECB29 2 5 5 8KW UNITS ta ES UNITS FE EQUIPMENT 2 9 S L GROUND AN CONNECT POWER WIRES FROM UNT LABELED LI AND L2 TO TB2 TERMINAL STRIP ON HEATER PLAT
55. led check and expansion valve for all applica tions The TXV valve has been installed internally for a cleaner installation and is accessible if required ELECTROSTATIC DISCHARGE ESD Precautions and Procedures A CAUTION Electrostatic discharge can affect electronic components Take precautions during unit instal lation and service to protect the unit s electronic controls Precautions will help to avoid control exposure to electrostatic discharge bv putting the unit the control and the technician at the same electrostatic potential Neutralize electro static charge by touching hand and all tools on an unpainted unit surface before performing any service procedure II UNIT COMPONENTS A Control Box The CBX32M control box is shown in figure 2 Line voltage and electric heat connections are made in the control box Op tional electric heat fits through an opening located in the cen ter of the control box When electric heat is not used knock out plates cover the opening The electric heat control arrange ment is detailed in the electric heat section of this manual B Terminal Strip TB1 CBX32M units are equipped with a low voltage terminal strip TB1 located in the control box See figure 2 The strip is used for making up all indoor thermostat wires The outdoor unit low voltage wiring connections may be spliced with wire nuts in side the CB units C Transformer T1 CBX32M series units use a single line voltage
56. ming the N C primary S15 ing speed and economizer heat relay K43 is energized and secondary S20 limit switches are closed electric see 208 230VAC CB schematic heat element HE2 is energized Page 30 COMPONENT ARRANGEMENT DEC AMPS 5 304 CIRCUIT BREAKER ELECTRIC HEAT FOR USE WITH MEN R HEA PLUG ELECTRIC HEAT E is RELAY SEQUENCER ELECTRIC HEAT SWITCH LIMIT PRIMARY_ AUTO RESE SWITCH L IMIT SECONDARY RM BLOCK UN NA D LINE VOLTAGE FIELD INSTALLED DENOTES OPTIONAL COMPONENTS NOTE USE COPPER CONDUCTORS ONLY CIRCUIT 29 5 ECB29 2 5 5KW UNITS UNITS EQUI PMENTA GROUND N CONNECT POWER WIRES FROM UNT LABELED LI AND L2 TO TB2 TERMINAL STRIP ON HEATER PLATE A REFER TO UNIT IMUM OVE PROTECTION SIZE EQUIPMENT GROUND IS LOCATED IN INDOOR UNIT LENNOX 2 WIRING DIAGRAM HEATING UNITS ELECTRIC ECB29 2 5 5 2 P 29 5 2 Supersedes Form New Form No pee t L532 1526 1997 Lennox Industries Inc Litho U S A C ECB29 2 5 5 5CB 208 230V SINGLE PHASE SEQUENCE OF OPERATION 1 When there is a call for heat W1 of the thermostat ener 3 When K32 2 closes assuming N C primary 515 and gizes the electric heat relay K32 with 24VAC the secondary S20 limit switches are closed electric 2 When K32 1 closes the blower is energized on heat heat element HE1 is energized ing speed and economize
57. n Flow Conversion Kit 83M57 83M57 83M57 83M57 83M57 83M57 Horizontal Support Frame Kit 56 18 56 18 56 18 56 18 56 18 56 18 Side Return Unit Stand Up Flow 45K31 45K32 45K32 45K32 45K32 45K32 Single Point Power Source Control Box 21H39 21H39 21 39 21 39 21 39 21 39 Step Down Transformer Kit 575V applications 66K90 66K90 66K90 Wall Hanging Bracket Kit Up Flow 45K30 45K30 45K30 45K30 45K30 45K30 T Disposable frame type filter 2 HACR type circuit breaker or fuse 3 Blower motor is 460V 1 phase Optional electric heat is 460V 3 phase REPLACEMENT CIRCUIT BREAKERS Voltage 25 amp 30 amp 35 amp 40 amp 45 amp 50 amp 60 amp 208 240V 1 Phase 41K13 17K70 72K07 49K14 17K71 41K12 17K72 2 pole breaker 208 240V 3 Phase 18 85 41 16 18 86 41 15 41 17 3 pole breaker Page 2 Blower Data External Static CBX32M 018 024 BLOWER PERFORMANCE 208 230v Air Volume and Motor Watts at Specific Blower Taps NOTE All air data is measured external to unit with air filter in place with bottom retum air Electric heaters have no appreciable air resistance Page 3 Pressure High Medium Low in w g Pa cfm L s Watts cfm L s Watts cfm L s Watts 00 0 1030 485 365 895 425 300 700 330 245 05 10 1015 480 360 890 420 295 695 330 245 10 25 1000 470 355 875 415 290 690 325 240 15 35 980 465 345 860 405 285 680 320 235 20 50 960 455 340 845 400 280 665 315 230 25 60 935 44
58. ove jumper between W2 and R 4 When K32 2 closes the unit is ready for a second stage heat demand W2 of the thermostat sends a second stage heat demand energizing the electric heat relay K33 with 24VAC 5 When K33 2 closes assuming the N C primary 515 and secondary S20 limit switches are closed electric heat element HE2 is energized K33 1 closes until sec ond sage heat demand is satisfied Page 32 RIPTION COMPONENT CIRCUIT BREAKER ELECTRIC HEAT IHES 4 ELEMENT ELECTRIC HEAT IP2 PLUG ELECTRIC HEAT K A QUENCER R HEA IK33 1 2 RELAY SEQUENCER ELECTRIC HEAT K34 1 2 RELAY SEQUENCER ELECTRIC HEAT sis SWITCH LIMIT S20 SWITCH LIMIT SECONDARY A CIRCUIT 2 LI T tN L2 api CB2 EQUIPMENT LENNUX 5 Inc WIRING DIAGRAM 5 97 HEATING UNITS ELECTRIC ECB29 12 5CB I5CB 2 P Supersedes Form No New Form No eem ree S32 524N 1997 Lennox Industries Inc Litho U S A PRIMARY AUTO RESET LINE VOLTAGE FIELD INSTALLED DENOTES OPTIONAL COMPONENTS CIRCUIT REFER TO UNIT NAMEPLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVER PROTECTION SIZE HEI NOTE USE COPPER CONDUCTORS ONLV E ECB29 12 5CB 15CB 208 230V SINGLE PHASE SEQUENCE OF OPERATION FIRST STAGE HEAT 1 When there is a call for heat W1 of the thermostat ener gizes electric heat relays K32 and K33 with 24VAC 2 When K32 1 closes the blower is energized on heat ing speed an
59. r Source Stages Full Ampacity Protection Volts kw TBtuh 1994 CK 1 2 3 Minimum 5 Maximum mps iri sia 1 2 Circuit Overcurrent Ampacitv Protection SINGLE PHASE 4 kW ECB29 4 55W87 1 208 3 0 110 250 24 21 425 4 Ibs Terminal Block TA mE FRE ECB29 4CB 55W88 220 3 4 11 450 2 4 24 25 30A Circuit breaker 230 3 7 12 550 24 24 425 68 240 4 0 13 650 2 4 24 425 5 kw ECB29 5 28K31 1 208 3 8 12 800 2 4 26 30 4 Ibs Terminal Block ECB29 5CB 28 32 220 4 2 14 300 2 4 29 30 30A Circuit breaker 230 4 6 15 700 2 4 29 30 a c S 240 5 0 17 100 2 4 29 30 6 kw ECB29 6 47122 1 208 4 5 15 400 2 4 30 430 4 Ibs Terminal Block ECB29 6CB 47L23 220 5 0 17 100 2 4 34 35 35A Circuit breaker 230 5 5 18 800 2 4 34 35 240 6 0 20 500 2 4 34 35 Dus Iu ENS 8 kW ECB29 8 28K33 1 208 6 0 20 500 2 4 40 440 5 Ibs Terminal Block ECB29 8CB 28K34 220 6 7 22 900 2 4 45 45 45A Circuit breaker 230 7 3 25 100 2 4 45 45 240 8 0 27 300 2 4 45 45 9 kW ECB29 9CB 10111 2 208 6 8 25 600 2 4 44 445 wes 5 Ibs 50A Circuit breaker ECB29EH 9CB 91 67 220 7 6 28 700 2 4 50 50 50A
60. r heat relay K43 is energized see 208 230VAC CB schematic Page 31 COMPONENT ARRANGEMENT O CB OR TB COMPONENT CIRCUIT BREAKER ELECTRIC HEAT IK32 1 2 3 IRELAV SEQUENCER ELECTRIC HEAT IK33 1 2 RELAY SEQUENCER ELECTRIC HEAT SWITCH LIMIT PRIMARY AUTO RESE SWITCH LIMIT SECONDARY _ TERMINAL BLOCK UNIT j EQUIPMENT GROUND A A CONECT POWER WIRES FROM UNT LABELED LI AND 12 70 TB2 TERMINAL STRIP ON HEATER PLATE A 195 UNIT NAMEPL MINIMUM CIRCUIT AND MAXIMUM OVER PROTECTION SIZE LA EQUIPMENT GROUND IS LOCATED IN INDOOR UNIT LENNOX f ARE Inc FOR USE BREAKERS NOTE USE COPPER CONDUCTORS ONLY LINE VOLTAGE FIELD INSTALLED lt DENOTES OPTIONAL COMPONENTS A CIRCUIT WIRING DIAGRAM 5 97 HEATING UNITS ELECTRIC 29 10 2 ECB29 I OCB 2 P New Form No Supersedes Form No eem et 532 527 1997 Lennox Industries Inc Litho U S A D ECB29 10 10CB 208 230V SINGLE PHASE SEQUENCE OF OPERATION FIRST STAGE HEAT 1 When there is a call for heat W1 of the thermostat ener gizes the electric heat relay K32 with 24VAC 2 When K32 1 closes the blower is energized on heat ing speed and economizer heat relay K43 is energized see 208 230VAC CB schematic 3 K32 3 doses and assuming the N C primary 815 and sec ondary S20 limit switches are closed electric heat element HE1 is energized SECOND STAGE HEAT rem
61. rminal bl ck 220 67 22 900 24 IET Een 230 73 25 100 24 230 m ES 240 8 0 27 300 24 OF PES E FFS 10 kW ECB29 10 28K43 1 208 75 25600 24 265 521720 eee ee Terminal Blok 220 8 4 28 700 24 ma pet 230 92 31400 24 m ES 240 10 0 34 100 24 tai ANT oe Ee ECB29 10 28K47 1 440 84 28 700 1 3 iP eee lh Pe eee 3 20A Fuses 460 9 2 31 400 1 3 iz ees WES 480 10 0 34 100 1 3 iz p 15kW 29 15 28K44 1 208 11 3 38 400 24 42 445 ke 12 Ibs 50A Circuit breaker 220 12 6 43 000 24 48 50 230 13 5 47 000 24 48 50 m A 240 15 0 51 200 24 48 50 T Bor ECB29 15 28K48 1 440 12 6 43 000 1 3 24 1e 152 DUE 3 25 Fuses 460 13 8 47 000 1 3 24 30 mm ae 480 15 0 51 200 1 3 m 20 kW 29 20 28K45 2 208 15 0 51 200 24 29 21 430 430 56 60 IQIS A atc Gireuit breaker 220 16 8 57300 24 24 35 35 60 60 230 184 62 700 24 33 24 35 35 60 60 240 20 0 68 200 24 33 24 35 35 63 70 ECB29 20 28K49 1 440 16 8 57 300 1 3 AEN Amr s ER 3 gn Fuses 460 184 62 700 1 3 Tani NET gs 480 20 0 68 200 1 3 aee m m 5 ECB29 20 28K51 1 550 16 8 57 300 613 Fa ET 575 18 4 62 700 613
62. t as above For systems with non ducted returns leave the other end of the manometer open to the atmosphere 3 With only the blower motor running and the evaporator coil dry observe the manometer reading Adjust blow er motor speed to deliver the air desired according to the job requirements 4 External static pressure drop must not exceed 0 5 W C 1 2 kPa 5 Seal around the hole when the check is complete C Blower Speed Taps Blower speed tap selection is accomplished by changing the taps at the blower motor harness connector Discon nect harness connector from motor to expose speed se lectors Blower speed selections are listed on the wiring diagrams Refer to the ECB29 installation instructions for minimum allowable blower speed when using electric heat To Change Blower Speed 1 Turn off electric power to furnace 2 Remove blower access door 3 Disconnect blower motor harness from motor 4 Select desired speeds for heating and cooling Black cooling high speed Orange common Yellow electric heat only 5 Depress harness connector tab to release wire ter minal Select connector location for new speed refer to unit wiring diagram Insert wire terminal until it is se curely in place See figure 23 6 Replace harness connector to motor Page 26 BLOWER SPEED TAP SELECTION HARNESS CONNECTOR DEPRESS TO RELEASE 2 WIRE TERMINAL SELECT CON NECTOR LOCATION FOR NEW SPEED REFE
63. tches are closed electric heat elements HE4 HE5 and HE6 are energized
64. tions General Data Model Number CBX32M CBX32M CBX32M CBX32M CBX32M CBX32M 018 024 030 036 042 048 060 Nominal Tonnage 1 5 2 2 5 3 3 5 4 5 Refrigerant R 410A R 410A R 410A R 410A R 410A R 410A Connections Suction vapor line sweat 5 8 3 4 3 4 7 8 7 8 7 8 Liquid line sweat 3 8 3 8 3 8 3 8 3 8 3 8 Condensate drain fpt 2 3 4 2 3 4 2 3 4 2 3 4 2 3 4 2 3 4 Evaporator Net face area ft 2 3 56 4 44 5 0 5 0 7 22 7 22 Tube outside diameter in 3 8 3 8 3 8 3 8 3 8 3 8 Number of rows 3 3 3 3 3 3 Fins per inch 12 12 12 12 12 12 Blower Data Wheel nom diameter x width in 10x7 10x8 11x8 11x8 11 1 2x 9 12x9 Blower motor output hp 1 5 1 3 1 3 1 3 1 3 1 2 Filters 1 Number 1 1 1 1 1 1 Size in 15x20x1 20x20x1 20x22x1 20x22x1 20x24x1 20x24x1 Shipping Data 1 Package Ibs 136 157 177 181 206 206 Voltage 1 phase 208 230V 208 230V 208 230V 208 230V 208 230V 208 230V Voltage 3 phase aia aes 3 460V 3 460V 3 460V 2 Maximum overcurrent protection unit only 15 15 15 15 15 15 all voltages Minimum circuit ampacity unit only 208 230V 2 2 3 460V OPTIONAL ACCESSORIES MUST ORDERED EXTRA Circuit Breaker Cover Kit 82W01 82W01 82W01 82W01 82W01 82W01 Down Flow Additive Base 34 72 44K15 44K15 44K15 44K15 44K15 Dow
65. unit 2 Remove the coil assembly from the unit 3 For best efficiency and air flow remove the horizontal drain pan from the units in downflow positions See figure 11 4 Rotate cabinet 180 from the upright position See figure 11 You may need to first remove the blower assembly to lighten the cabinet for lifting DOWNFLOW DISCHARGE POSITION Remove the horizontal drain pan Upflow Downflow Drain Pan FIGURE 11 DOWNFLOW DRIP SHIELDS Drip Shield FIGURE 12 Page 22 5 From the underside of the coil install the downflow drip shield firmly in place See figure 12 6 Replace the coil assembly and blower if you have re moved it Replace the coil access panel See figure 11 7 Set the unit so that it is level Connect the return and supply air plenums as required using sheet metal screws NOTE For downflow application you must use metal or class supply and return air plenums NOTE For downflow application metal or class supply and return air plenums must be used For downflow installation on combustible flooring an additive base must be used See figure 13 COMBUSTIBLE FLOOR PROPERLY SIZE ADDITIVE BASE FLOOR OPENING 18 1 4 464 CB29M 21 26 amp 31 CBX32M 21 26 23 1 4 591 CB29M 41 65 CBX32M 31 65 20 508 29 41 65 CBX32M 31 65 15 381 CB29M 21 26 amp 31 CBX32M 21 26 22 1 8 zh Td 562 e 13 3 8 340 Y 2

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