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CB28UH, CB29M & CB30M

1. eer E om Dm fo poem se Lm e mm 8 Dm pomme omm s me 8 o9 ow 9 o 24 a a 2 Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for least 167 F 75 Electric heater capacity only does not include additional blower motor heat capacity eMinimum circuit ampacity for blower motor only Page 25 TABLE 8 ELECTRIC HEAT DATA 1 PHASE CB29M 41 CB29M 46 Electric Heat kW Model Number amp Shipping Weight Blower Coil Model Number ECB29 5 28K31 ECB29 5CB 28K32 4 Ibs 2 kg ECB29 8 28K33 ECB29 8CB 28K34 5 Ibs 2 kg ECB29 10 28K35 ECB29 10CB 28K36 5 Ibs 2 kg 29 41 29 12 5 28 37 10 Ibs 5 kg ECB29 15CB 28K38 10 Ibs 5 kg ECB29 20CB 28K39 14 Ibs 6 kg ECB29 5 28K31 ECB29 5CB 28K32 4 Ibs 2 kg ECB29 8 28K33 ECB29 8CB 28K34 5 Ibs 2 kg ECB29 10 28K35 ECB29 10CB 28K36 5 Ibs 2 kg CB29M 46 ECB29 12 5CB 28K38 10 Ibs 5 kg
2. 1995 Lennox Industries Inc Litho U S A O ECB29 5 8 10 15CB 208 230V THREE PHASE SEQUENCE OF OPERATION 1 When there is a call for heat W1 of the thermostat gized see 208 230VAC CB schematic 2 3 When 2 1 K32 2 and K33 2 closes assuming the N C primary S15 and secondary 520 limit switches 2 When K32 1 and or K33 1 closes the blower is energized are closed electric heat elements HE1 HE2 and HE3 on heating speed and economizer heat relay K43 is ener are energized Page 55 COMPONENT ARRANGEMENT HEL 2 3 LEMENT ELECTR IC HEAT P2 PLUG ELECTRIC HEAT 52 1 2 QUENCER a HEA 55 2 ELECTRIC HEAT CIRCUIT 1 GROUND ECB29 I5CB IY CBI T Ts CIRCUIT L2 pe T L2 EQUIPMENT VEN Ay D 2 e e 1 NO TE USE 60 AMP BREAKER ON ECB29 15CB UNITS FOR COMPLETE CIRCUIT USE DIAGRAM FOR THE ECB29 5 8 4 10 1 2 5 5 8 4 IOKW HEATERS ONLY CBI USED ON ISKW HEATER ONLY EQUIPMENT GROUND LOCATED IN INDOOR UNIT Supersedes Form No 1997 Lennox Industries Inc Po DESCRIPTION 1 COMPONENT CBI UIT BREAKER RIC H CONNECT POWER WIRES FROM ZAHEATER LABLED 11 12 13 TO TB2 TERMINAL STRIP INSIDE INDOOR UNIT eee LINE VOLTAGE FIELD INSTALLED DENOTES OPTIONAL COMP
3. 7o eeo ves 746 20800 46 nes 8 o8 eo a o 000 oes 08 98s F8 809s 200 os ous seo 56 ees 266 2 335 640 800 250 580 2 2 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance CB29M 41 BLOWER PERFORMANCE 208 230v External Static Air Volume and Motor Watts at Specific Blower Taps Pressure Wem inwg Pa Us Watts Us Watts 19 Watts 9 s p 5 55 s 1485 700 1 ams e p m ees 438 aro as o9 60 66 56 6 8 71 85 1445 1780 E 6o ero ses 89 9 1206 870 125 v25 748 s 9 1865 60 840 820 46 8 748 610 810 _ 1060 800 6 870 410
4. SPEED TAPS HEAT ONLY 3 __ 2 SPEED LENNOXe COILS BLOWER COIL UNITS CB29M 41 1 G 41 1 6 B29M 51 65 1 6 J CBSOM 51 65 1 6 J upersedes E New Form No 2001 Lennox Industries Inc Litho U S A C CB29M 460 and 575V THREE PHASE SEQUENCE OF OPERATION 1 In 460 volt units line voltage is routed to transformer T1 and blower motor 2 575 volt units line voltage is routed to transformer 26 Transformer T26 supplies 460VAC to transformer T1 and blower motor B3 3 1 supplies 24VAC through door interlock switch S51 to terminal strip TB1 which supplies 24VAC to the indoor thermostat and electric heat if used HEATING 4 When there is a call for heat W1 of the thermostat ener gizes the electric heat blower relay K36 covered in the electric heat section 5 Blower motor is energized on heating speed after K36 3 closes see electric heat 6 The economizer if used is energized after K36 2 closes see electric heat section COOLING 7 When there is a call for cooling G of the thermostat en ergizes blower relay K3 and the economizer if used See electric heat for economizer 8 2 closes energizing blower motor on cooling speed Page 43 FIELD WIRING FOR ECB SERIES UNITS WITHOUT CIRCUIT BREAKERS A d Au 4 A T 8 15 PRESENT ELECTRIC HEATERS THE NUMBER OF CIRCUITS VARY ACCORDING TO HEATER MODEL REFER TO FA
5. 860 480 475 820 m ws o s 750 29 7s w o ss s s s ss 75 se 29 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance Page 6 BLOWER DATA CB29M CB29M 41 BLOWER PERFORMANCE 460v 1 ph Air Volume and Motor Watts at Specific Blower Taps External Static Pressure 25 1455 1445 1430 1420 1400 1385 1220 575 475 1025 485 400 845 1160 545 430 465 1090 515 375 air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance External Static Pressure a o CB29M 46 BLOWER PERFORMANCE 208 230v Air Volume and Motor Watts at Specific Blower Taps 1750 1740 1725 1700 1675 1645 1610 1525 1420 1295 175 1155 995 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance ala a N gt o o o ojo 100 125 150 N o N al A a a ajoja CB29M 51 BLOWER PERFORMANCE 208 230v External Static Air Volume and Motor Watts at Specific Blower Taps Pressure Low mwg Pa cm Us Watts cfm Ls Watts cfm Us 39 T 9e v 88 89 780 59 98 2000 5
6. Optional Accessories Must Be Ordered Extra Up Flow Only Ship wt Ibs kg 58 6 3 Wall Hanging Bracket Kit Shipping weight Ibs kg 45K30 3 1 Up Flow Only Down Flow Combustible Base Ship wt Ibs kg 32 80 34J73 8 4 Ms qme __ we we 29 12 5 oom oum Bun an S 510070188 mu Bun tn 715071209 ECB29 20CB 100 100 100 100 rm a 59 0 Output Btuh KW ECB29 25CB Output Btuh KW 2222221 105 500 30 9 ECB29 30CB TAnnual Fuel Utilization Efficiency based on U S DOE test procedures and according to FTC labeling regulations TTCB30M 21 26 31 46 51 65 furnished with disposable frame type filter CB30M 41 furnished with cleanable polyurethane frame type filter Includes additional blower motor heat capacity Blower motor is 460v single phase Blower motor is 460v single phase 575v electric heaters are shipped with step down transformer for use with 460v units CB30M 51 amp CB30M 65 models only Page 9 BLOWER CB30M 21 26 BLOWER PERFORMANCE 208 230v Air Volume and Motor Watts at Specific Blower Taps External Static Pressure A 485 480 470 465 455 440 N a
7. e nx mn 34 IV CONFIGURATION MODIFICATIONS CB28UH units can be installed in upflow horizontal right discharge or horizontal left discharge CB29M and CB30M units may be installed in the upflow downflow horizontal right hand discharge or horizontal left hand discharge orienta tion The units come from the factory ready for upflow or horizon tal right hand discharge installation If the unit needs to be modified from its original configuration use the following procedures All procedures assume the unit has not been modified from the factory A Disassembly of CB30M Cabinet For tight applications where a modular design is an ad vantage the CB30M 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 CB30M use the following procedure 1 Remove the two black screws located just above the seam in the top half of the unit 2 Remove the front 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 T 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
8. ECB29 8CB 28K34 220 6 7 22 900 1 5 44 45 2 4 45 45 45A Circuit breaker 230 7 3 25 100 1 5 44 45 2 4 45 45 240 8 0 27 300 1 5 44 45 2 4 45 45 9 kW ECB29 9CB 10L11 2 208 6 8 23 100 1 5 42 445 2 4 44 445 5 Ibs 50 Circuit breaker 220 7 6 25 800 1 5 49 50 24 50 50 230 83 28 200 1 5 49 50 2 4 50 50 240 9 0 30 700 1 5 49 50 2 4 50 50 10 kw 29 10 28 3 2 208 7 5 25 600 1 5 47 450 2 4 48 450 6 Ibs Terminal block A n ECB29 10CB 28K36 220 84 28 700 1 5 54 60 2 4 55 60 60A Circuit breaker 230 9 2 31 400 1 5 54 60 2 4 55 60 240 100 34 100 1 5 54 60 24 55 60 12 5 kw ECB29 12 5CB 28K37 3 208 9 4 32 000 2 4 22 31 25 445 10 Ibs 1 25 amp 1 50A Circuit breaker 220 10 5 35 800 24 25 35 25 50 Not Available 230 11 5 39 200 2 4 25 35 25 50 240 12 5 42 600 2 4 25 35 25 50 15 kW ECB29 15CB 28K38 3 208 113 38 400 2 4 26 37 30 450 12 105 1 30A 4 1 60A Circuit breaker 220 12 6 43 000 24 29 42 30 60 Not Available 230 13 5 47 000 2 4 29 42 30 60 240 15 0 51 200 2 4 29 42 30 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 2 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 3 HACR type breaker or fuse
9. LENNOX Service Literature CB30M UNIT INFORMATION 29 Corp 9711 L7 Revised 08 2003 MERIT 10 CB28UH ELITE 10 CB29M and ELITE 12 CB30M SERIES UNITS INCLUDING ECB29 ELECTRIC HEAT The Merit 10 CB28UH Elite 10 CB29M and Elite 12 CB30M are high efficiency blower coils Several models are available in sizes ranging from 1 1 2 through 5 tons 5 3 through 17 6 kW The CB28UH is an upflow horizontal unit and the CB29M and are multi position upflow downflow or horizontal units The units come with a factory installed check and expan sion valve for cooling or heat pump applications CB28UH and CB29M series units are designed to be matched with the 10 SEER air conditioner and heat pump line and the 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 condi tioners or heat pumps as noted in the rating information 29 electric heat in several voltages and kW sizes can be field installed in the CB28UH CB29M and CB30M cabinets Information contained in this manual is intended for use by ex perienced HVAC service technicians only All specifications are subject to change Procedures outlined in this manual are pre sented as a recommendation only and do not supersede or re place local or state codes IMP
10. 4 Bold text indicates that the circuit breaker on CB circuit breaker models must be replaced field provided with size noted Page 22 TABLE 5 ELECTRIC HEAT DATA CB28UH 036 amp CB28UH 042 SINGLE PHASE ELECTRIC HEAT CB28UH 036 CB28UH 042 Blower 2 Minimum 3 Maximum Blower 2 Minimum 3 Maximum Motor Circuit Overcurrent Motor Circuit Overcurrent Input Full Ampacity Protection Full Ampacity Protection No Load Circuit Circuit Circuit Circuit Load Circuit Circuit Circuit Circuit Model Number Steps Volts kW Btuh Amps 1 2 1 2 Amps 1 2 1 2 5 kW ECB29 5 28K31 1 208 38 12800 24 26 30 44 29 30 4 Ibs 220 42 14300 24 29 30 44 32 35 30A Circuit breaker 230 46 15700 24 29 30 44 32 35 240 50 17100 24 29 30 44 32 35 6 kW ECB29 6 47L22 1 208 45 15400 24 30 430 44 33 35 DC 17122 220 50 17 100 24 34 35 44 37 40 Circuit breaker 240 55 18800 24 34 wes 35 44 37 40 240 60 20500 24 34 35 44 37 40 8 kW ECB29 8 28K33 2 208 60 20 500 24 40 40 44 42 45 bs CRON ALAS OA 220 67 22 900 24 45 45 44 47 50 45A Circuit breaker 240 7 3 25100 24 45 45 44 47 50 240 80 27300 24 45 45 44
11. ECB29 15CB 28K38 10 Ibs 5 kg ECB29 20CB 28K39 14 Ibs 6 kg Refer to National or Number of Steps 1 step anadian Electrical Code manual to determine wire fuse and discon nect size requirements Use wires suitable for at least 167 F 75 C Minimum e Blower Circuit Ampacity Motor Amps Volts Input 208 230v 1 ph 38 12800 24 zo a2 14300 29 46 15700 60 20500 _24 Lum pos o2 8 209 gt Ls poss qom 28 8 me 75 25600 4 gt E Ce RSE 39 2 20 3e 24 12s 2 26 zm 126 24 27 129 358 57800 24 penale a eel Circuit 1 Circuit 2 20 2 7 547 7 ___36 N AJl BR N Oj ay BR AP oy 5 Ry RY A N CO MH P 208 11 3 220 12 6 230 13 5 208 15 0 220 16 8 230 18 4 62 700 240 20 0 68 200 heater capacity only does not include additional motor heat capac IS eMinimum circuit ampacity for blower motor only N 1 b amp 5 Q 26 TABLE 9 ELECTRIC HEAT DATA 1 PHASE 29 51 am
12. 28K37 10 Ibs 5 kg ECB29 15CB 28K38 10 Ibs 5 kg ECB29 20CB 28K39 14 Ibs 6 kg ECB29 5 28K31 ECB29 5CB 28K32 4 Ibs 2 kg ECB29 8 28K33 ECB29 8CB 28K34 5 Ibs 2 kg ECB29 10 28K35 ECB29 10CB 28K36 CB30M 46 CB30U 41 46 ECB29 12 5CB 28K38 10 Ibs 5 kg ECB29 15CB 28K38 10 Ibs 5 kg ECB29 20CB 28K39 14 lbs 6 kg Number of Steps 1 step 2 Blower Motor Amps TMinimum Circuit Ampacity 208 230v 1 ph ae ss 12800 gt zm 2 wa gt s 18700 ws 7 se me ws a so 20800 15 3 sz ws 9 s za 18 a i laa 383 E 5 15 zm ws 178 42600 173 24 5 zm 1s 43000 zm 18 sumo 80 20 0 1 73 389 24 3496 24 72870 24 24 2050 54 2200 24 25 9 24 2790 24 72580 24 24 wm p Lm 589 24 29200 24 459 24 54m 24 05 24 24 sumo 24 24 sam 24 24 24 62 700 68 200 240 220 38 40 42 43 45 48 50 52 45 48 50 2 5 9 Refer to Nati
13. Ne PS q gt 2 L FUSE BLOCK x 2 T lt TERMINAL STRIP TB3 2 TB3 64 kD LER Pd H K PRIMARY LIMIT S15 HEAT BLOWER RELAY K36 ELECTRIC HEAT CONTACTOR K15 TRANSFORMER T1 575 VOLT ONLY FIGURE 11 Page 21 TABLE 4 ELECTRIC HEAT DATA CB28UH 018 024 amp CB28UH 030 SINGLE PHASE ELECTRIC HEAT CB28UH 018 024 CB28UH 030 Blower Blower 2 Minimum 3 Maximum Motor 2 Minimum 3 Maximum Motor Circuit Overcurrent Model Number Steps Input Full Circuit Overcurrent ipee Ampacity Protection Volt kW Btuh Load Ampacity Protection Circuit Circuit Circuit Circuit Amps PS 2 1 2 2 5 kW ECB29 2 5 28K30 1 208 19 6 400 1 5 13 15 4 Ibs Terminal block 220 21 7 200 15 15 15 Not Available 230 23 17 800 1 5 15 15 240 25 8 500 1 5 15 15 5 kw 29 5 28 31 1 208 3 8 12 800 1 5 24 425 2 4 26 30 4 Ibs Terminal Block eR ECB29 5CB 28K32 220 42 14 300 1 5 28 30 2 4 29 30 30A Circuit breaker 230 46 15 700 1 5 28 30 2 4 29 30 240 5 0 17 100 1 5 28 30 24 29 30 6 kW 29 6 47122 1 208 45 15 400 1 5 29 430 2 4 30 430 4 Ibs Terminal block ECB29 6CB 47L23 220 5 0 17 100 1 5 33 35 2 4 34 35 35A Circuit breaker 230 5 5 18 800 1 5 33 35 2 4 34 35 240 6 0 20 500 1 5 33 35 24 34 35 8 kW ECB29 8 28K33 2 208 60 20 500 1 5 40 40 2 4 40 440 5 Ibs Terminal block
14. PROTECTION SIZE LINE VOLTAGE FIELD INSTALLED lt DENOTES OPTIONAL COMPONENTS LENNOX inc WIRING DIAGRAM 1 96 HEATING UNITS ELECTRIC 29 10 15 20 25 1 6 ECB29 20 25 1 J Supersedes Form No New Form No 551 708W 1996 Lennox Industries Inc Litho U S A R ECB29 10 15 20 25 460V and 575V THREE PHASE SEQUENCE OF OPERATION 1 When there is a call for heat W1 of the thermostat ener 4 When K36 3 closes the blower is energized on heat gizes the electric heat relay K36 with 24VAC ing speed see 208 230VAC CB schematic 5 When 15 1 contacts close assuming the N C sec ondary S20 limit switches are closed electric heat ele ment HE1 is energized 2 When K36 1 closes assuming the N C primary limit S15 is closed electric heat contactor K15 is ener gized with 24VAC 6 If one of the secondary limit switches S20 should 3 The economizer if used is energized after K36 2 open one of the three heating elements of HE1 will re closes main energized Page 58
15. RIMARY AUTO RESET SWITCH LIMIT SECONDARY AX A CIRCUIT 2 LI 12 15 EQUIPMENT GROUND js LI 5 515 520 E N REFER TO UNIT NAMEPLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVER PROTECTION SIZE OCB L25CB 40 50A 35A NOTE USE COPPER CONDUCTORS ONLY LINE VOLTAGE FIELD INSTALLED DENOTES OPTIONAL COMPONENTS CIRCUIT EQUIPMENT GROUND d LENNOX res WIRI NG 11 95 HEATING UNITS EL ECTRIC 29 20 25 1 Superse New Form No 531 707W des Form No 1995 Lennox Litho U S A Industries Inc Q ECB29 20CB 25CB 208 230V THREE PHASE SEQUENCE OF OPERATION FIRST STAGE HEAT 1 When there is call for heat of the thermostat energizes the electric heat relays K32 and K34 with 24VAC When 2 1 closes the blower is energized on heat ing speed and economizer heat relay K43 is ener gized see 208 230VAC CB schematic When K32 1 K32 2 closes assuming the N C primary S15 and secondary S20 limit switches are closed electric heat elements HE1 and HE2 are energized When K34 1 closes assuming the N C primary S15 and secondary S20 limit switches are closed electric heat element HES is energized SECOND STAGE HEAT remove jump
16. 230 73 25100 24 _ 26 240 80 27300 24 27 208 75 2560 24 29 2200 84 2870 24 5 230 92 31400 24 52 240 100 34100 24 293 208 7113 3840 24 42 220 126 4800 24 4 280 135 47000 24 45 208 60 2050 24 274 220 230 208 220 25 600 28 700 31 400 240 80 27300 24 _ 27 20 100 34100 24 3 ___ 208 13 3840 24 2342 222 126 43000 24 442 xx O 230 135 47000 24 45 240 150 51200 24 _ 48 10 208 60 2050 39 26 220 67 22900 39 27 230 73 25100 39 28 240 80 27300 39 29 208 75 25600 39 571 220 84 2870 39 592 230 92 3140 39 54 240 100 34100 39 35 208 13 3840 39 4 220 126 43000 39 46 290 135 4700 39 47 240 150 51200 39 50 TRefer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at least 167 F 75 T Electric heater capacity only does not include additional blower motor heat capacity 2 Minimum circuit ampacity for blower motor only Page 33 TABLE 16 ELECTRIC HEAT DATA 3 PHAS
17. 30 30 10 kW ECB29 10 28K43 3 208 75 25600 45 32 5 46 32 35 6 Ibs Terminal Block steps 220 8 4 28 700 45 36 40 46 38 40 230 92 31 400 45 36 40 46 36 40 240 10 0 34 100 45 36 40 46 36 40 15 kW 29 15 28 4 3 208 11 3 38 400 45 45 445 46 45 445 12 Ibs 1 Circuit breaker steps 220 12 6 43 000 45 51 60 46 51 60 230 13 5 47 000 45 51 60 46 51 60 240 15 0 51 200 45 51 60 46 B 60 20 KW ECB29 20CB 28K45 6 208 15 0 51200 45 32 21 35 430 46 32 21 35 430 19165 2 35A Circuit breaker steps 220 16 8 57 300 45 36 24 40 35 46 36 24 40 35 230 18 4 62 000 45 36 24 40 35 46 36 24 40 35 240 20 0 68 200 45 36 24 40 35 46 36 24 40 35 25 kW ECB29 25CB 28K46 6 208 18 8 64 100 45 39 27 440 40 46 39 27 440 40 19 lbs 2 45 Circuit Breaker steps 220 21 0 71 700 45 43 30 45 45 46 43 30 45 45 230 23 0 78 500 45 43 30 45 45 46 48 30 45 45 240 25 0 85 300 45 43 30 45 45 46 43 30 45 45 NOTE Circuit 1 Minimum Circuit Ampacity includes the Blow
18. 75 25600 24 48 gt 220 84 2870 24 59 230 92 3140 24 53 240 3100 3410 24 5 _ __ 208 94 3200 24 22 38 gt 220 105 3580 24 40 280 ns 3920 24 24 42 gt 240 125 4260 24 2 43 _ 208 113 38400 24 2 gt 220 126 43000 24 27 48 gt 47000 24 28 49 gt 51 200 24 52 51 200 24 57 300 24 N 4 gt 5 ALAR BR oO 62 700 2 4 68 200 2 4 64 100 2 4 71 700 2 4 78 300 2 4 85 300 2 4 12 800 3 9 14 300 3 9 15 700 3 9 17 100 3 9 20 500 3 9 22 900 3 9 25 100 3 9 27 300 3 9 25 600 3 9 28 700 3 9 31 400 3 9 34 100 3 9 32 000 3 9 35 800 3 9 39 200 3 9 42 600 3 9 38 400 3 9 43 000 3 9 47 000 3 9 51 200 3 9 51 200 3 9 57 300 3 9 62 700 3 9 68 200 3 9 4 4 4 4 e CCE 29 48 41 eo 80 230 240 208 220 230 240 208 220 230 240 208 220 230 240 208 220 230 240 208 220 230 240 208 220 230 240 208 220 230 240 208 220 230 240 208 tRefer 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 i Electric heater capacity only does not include additional blower motor heat capacity 2 Minimum circuit ampaci
19. Page 54 COMPONENT ARRANGEMENT EX CEO ZE CBI OR TB2 L2 DESCRIPTION COMPONENT CIRCUIT BREAKER ELECTRIC HEAT ELEMENT ELECTRIC HEAT PLUG ELECTRIC HEAT RELAY SEQUENCER ELECTRIC HEAT RELAY SEQUENCER ELECTRIC HEAT CONNECT POWER WIRES FROM SWITCH LIMIT PRIMARY AUTO RESET INHEATER LABLED LI L2 L3 SWITCH LIMIT SECONDARY TO TB2 TERMINAL STRIP TERMINAL BLOCK ELECTRIC HEAT INSIDE INDOOR UNIT A LINE VOLTAGE FIELD INSTALLED Li CIRCUIT DENOTES OPTIONAL COMPONENTS LI LI LI amp L2 L3 L3 L3 A EQUIPMENT GROUND 29 15 1 UN CBI LI 5 CIRCUIT L2 a REFER TO UNIT NAMEPLATE FOR MINIMUM CIRCUIT AMPACITY AND 515 520 MAXIMUM OVER L2 a lt ONG PROTECTION SIZE EQUIPMENT GROUND o O 1 NOTE He USE 60 BREAKER ON 29 15 UNITS NOTE USE COPPER 72 CONDUCTORS ONLY FOR COMPLETE CIRCUIT USE DIAGRAM FOR THE n 11 95 amp 0829 5 8 amp 107 LENNOX me WIRING DIAGRAM 222 A TB2 USED ON HEATING UNITS ELECTRIC 5 8 4 IOKW HEATERS ONLY A l USED ON ECB29 5 8 10 1 HEATER ONLY ECB29 15CB 1 Y A EQUIPMENT GROUND LOCATED IN INDOOR Supersedes Form UNIT 531 706W
20. Side Return Unit Stand Up Flow Only Ship weight Ibs kg 45K31 5 2 Single Point Power Source Control Box 2 or 3 circuits Shipping weight Ibs kg Wall Hanging Bracket Kit Up Flow Only Ship wt lbs kg 17 3 8 22 441 559 17 3 8x 22 441x559 21 3 8 x 22 543 x 559 16 20 406 2 16 x 20 406 x 508 20 x 20 508 x 508 45K31 5 2 45 32 6 3 21H39 5 2 21H39 5 2 45K30 3 1 45K30 3 1 1 One disposable frame type filter fumished HACR type breaker or fuse Model Number Nominal tonnage General Data CB28UH 048 4 CB28UH 060 5 CB28UH 042 3 5 Suction vapor line o d in mm sweat Liquid line o d D sweat 2 Net face area ft m Tube outside diameter in mm Number of rows Fins per inch fins per m Wheel nominal diameter x width Blower motor output hp W Size of filter in mm Voltage phase Minimum circuit ampacity unit only Maximum overcurrent protection unit only Connections Evaporator Coil Blower 1 Filters Electrical Data 60hz Shipping Data 1 package Ibs kg Optional Accessories Must Be Ordered Extra Electric Heat Catalog Number Model Number Filter Base 3 in 76 mm base height 1 or 2 in thick filters 25 or 51 mm 152 mm base height Catalog Number 1 2 or 4 in thick filters 25 51 or 102 mm Model Number Cabinet Size W
21. a ala N a o 4 o o EE w i o A BN E a N BN o gt A AS eo o lt EE o oo ayo ae N o alo oj oj o a a g o o ala Al A alo h alo N A S a N N zx a a a a o 2 A A Sj ay a a A o a ER a a A 20 eso ex sw ie 225 160 765 87 15 95 1555 785 865 1490 700 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance 680 o a alo NIN gi ala ala N oj a NIN ala a ala w alo olo N ala ala ala gt l gt 4 N wo gt N A BN E o N o CB29M 65 BLOWER PERFORMANCE 460v 1 ph Air Volume and Motor Watts at Specific Blower Taps External Static Pressure A 223
22. major blower coil components must be matched ac cording 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 erratic operation and can result in early unit failure The units come with factory installed check and expansion valve for all applications 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 by 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 CB29M 1 and CB30M 1 control box is shown in figure 2 460 and 575V unit control box also in figure 2 The CB28UH CB29M 2 and CB30M 2 control box is shown in figure 3 Line voltage and electric heat connections are made in the control box Optional electric heat fits through an opening located in the center of the control box When electric heat is not used knock out plates cover the opening The electric heat control a
23. 45 5 lbs Terminal Block 220 6 7 22900 45 48 50 46 48 50 E 230 73 25 100 45 48 50 46 48 50 240 80 27300 45 48 50 455 46 48 50 9 kW 29 9 10141 2 208 68 23100 45 47 50 46 47 50 5 lbs Circuit breaker 220 7 6 25 800 4 5 53 60 46 53 ated 2 660 See Ske 230 83 28 200 45 53 60 46 53 60 240 9 0 30 700 45 53 60 46 53 60 10 kW ECB29 10 28 3 2 208 75 25600 45 51 60 46 51 60 6 Ibs Terminal Block 220 84 28 700 45 58 60 46 58 60 230 92 31400 45 58 60 46 58 60 240 10034100 45 58 60 46 58 60 12 5 kW ECB29 12 5CB 28K37 3 208 94 32 000 45 25 31 25 445 46 25 31 25 445 10 Ibs 1254 amp 1 50A Circuit Breaker 220 10 5 35 800 45 27 35 30 50 46 28 35 30 50 230 11 5 39 200 45 27 35 30 50 46 28 35 30 50 240 12 5 42 600 45 27 35 30 50 46 28 35 30 50 15 kW 29 15 28K38 3 208 11 3 38 400 45 20 37 30 750 46 29 37 30 750 12 Ibs 1 30A amp 1 60A Circuit breaker 220 12 6 43 000
24. 47 50 9 kW 29 9 10011 2 208 68 23100 24 44 445 44 47 50 SO Circuit breaker 220 76 2580 24 50 50 44 53 60 230 8 28200 24 50 50 44 53 60 240 90 30700 24 50 50 44 53 60 10 kW ECB29 10 28K35 2 208 75 25600 24 48 450 44 55 60 595 EGBOB IUGE 20 84 28700 24 55 60 44 58 60 60A Circuit breaker 230 92 31400 24 55 60 44 58 60 240 10 0 34 100 24 55 60 44 58 60 12 5 kW 29 12 5 28K37 3 208 94 32 000 24 22 31 25 445 44 25 31 25 445 10 lbs 1 25 amp 1 50A Circuit breaker 220 10 5 35800 24 25 35 25 50 44 28 35 30 50 230 115 39200 24 25 35 25 50 44 28 35 30 50 240 125 42600 24 25 35 25 50 44 28 35 30 50 15 kW 29 15 28K38 3 208 113 38400 24 26 37 30 450 44 29 37 30 450 1218 _ 1 30A amp 1 60A Circuit breaker 220 126 43000 24 29 42 30 60 44 32 42 35 60 230 13 5 47 000 24 29 42 30 60 44 32 42 35 60 240 150 51 200 24 29 42 30 60 44 32 42 35 60 20 kW 29 20 1113 4 208 150 51 200 24 45 41 445 60 44 47 41 50 60 191bs 1 50A amp 1 60A Circuit breaker 220 168 57300 24 50 46 50 60 44 52 46 60 60 230 184 62700 24 50 46 50 60 44 52 46 60 60 240 200 68200 24 50 46 50
25. 630 1508 om 620 360 79 805 605 6 55 9 ___ 99 76 678 1270 8 09 1 es 788 565 F8 1195 8 o 1195 56 748 1060 6 26 s e 065 085 ses 875 708 To ams 780 870 295 700 59 29 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance CB30M 51 BLOWER PERFORMANCE 208 230v External Static Air Volume and Motor Watts at Specific Blower Taps Pressure 320 495 395 295 440 350 280 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance BLOWER CB30M 51 BLOWER PERFORMANCE 460v 1 ph Air Volume and Motor Watts at Specific Blower Taps NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance CB30M 65 BLOWER PERFORMANCE 208 230v External Static Pressure S o alo N N N NIN A 115 N 085 060 030 000 oai 925 1870 880 1755 1620 1465 1290 1195 NOTE All air data is measured external to unit with air filter in place Electr
26. Single phase electric heat uses two pole circuit breakers while three phase electric heat uses three pole circuit breakers TABLE 2 ECB29 CIRCUIT BREAKERS 1 CB2 CB3 UNIT AMPS AMPS AMPS ECB29 12 5CB 1 P s wae casaca one one _ ETE Note Do not remove patch plate or insulation on units without circuit breakers ECB29 15CB 1 Y 6 Fuse F3 460 and 575 volt only Line voltage connections are made to fuse F3 in all 460 and 575 volt electric heat sections Three fuses are mounted in the fuse block The electric heat name plate and Table 3 show the amp ratings for the fuses used TABLE 3 ECB29 460 575 VOLTAGE FUSES ECB29 10 1 G 20 AMP ECB29 15 1 G 25 D gt _ De 7 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 8 Heating Elements HE1 through HE6 Heating elements are composed of helix wound bare nichrome wire exposed directly to the airstream The ele ments are supported by insulators mounted to the wire frame Forsingle phase applications one elementis used per stage Each stage is energized indepe
27. Bold text indicates that the circuit breaker on CB circuit breaker models must be replaced field provided with size noted Page 23 for at least 167 F 75 C TABLE 6 ELECTRIC HEAT DATA 28 048 amp 28 060 SINGLE PHASE ELECTRIC HEAT CB28UH 048 CB28UH 060 Blower 2 Minimum 3Maximum 2 Minimum 3 Maximum No Motor Circuit Overcurrent Motor Circuit Overcurrent Model Number _ of Input Full Ampacity Protection Full MM Protection Steps Volts kW Btuh ASSA peur Circult Circuit Circuit Circuit Cireult ACE Circuit Circuit Circul Cirsult Circuit 5 kW 29 5 28 31 1 208 38 12 800 45 29 30 46 29 30 4 lbs Terminal Block 220 42 14 300 45 32 35 46 3 35 POM ra 230 46 15700 45 32 85 46 82 35 240 50 17100 45 32 35 46 32 85 6 kW ECB29 6 47L22 1 208 45 15400 45 33 5 46 33 5 4 lbs Terminal Block 220 5 0 17 100 45 37 40 46 37 40 L 230 5 5 18800 45 37 40 46 37 1 40 240 60 20500 45 37 40 45 37 40 8 kW ECB29 8 28K33 2 208 60 20500 45 42 45 46 42
28. CB29M 1 and CB30M 1 series units are equipped with internal secondary voltage overcur rent protection 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 CB28UH CB29M 2 2 units are equipped with a fuse F1 F1 provides secondary voltage overcurrent protection and is rated at 3 amps F Auto Transformer T26 575 volt only All CB28UH CB29M and CB30M 575 volt units use a 575VAC to 460VAC step down transformer mounted in the control box see figure 2 The transformer comes with the 575 volt electric heater and is connected to the unit via jack plugs J P50 and J P92 The transformer supplies 460VAC to transformer T1 and blower motor B3 G Transformer Fuse F33 575 volt only All T26 auto transformers are protected by two inline fuses F33 Both of the fuses are rated at 600 volts and 3 2 amps H Blower Relay K3 All CB28UH CB29M and CB30M units use a relay to energize the blower motor The relay coil is 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 Page 15 BLOWER ASSEMBLY BLOWER HOUSING BLOWER MOTOR CAPACIT
29. Capacitor ratings are shown in table 1 TABLE 1 CB29M amp CB30M BLOWER RATINGS NE POWER RATING RESIS zamro raro SM wee SEES nune 10MFD 370V CB28UH 048 CB29M 51 P G CB28UH 060 CB29M 65 P G SAHR 20MFD 370V CB30M 21 26 P 7 5 370V CB30M 31 P 1 3 41 18HP 15MFD 370V CB30M 46 P 18HP 20MFD 370V CB30M 51 P G 18HP 20MFD 370V CB30M 65 P G 12 20MFD 370V K Coil All CB28UH CB29M and CB30M series units have dual slab coils arranged in an configuration Each coil has two orthree 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 de signed to easily slide out of the unit cabinet L Plastic Drain Pans Both upflow downflow and horizontal drain pans are pro vided and installed on the CB28UH CB29M and CB30M 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 con figured for left hand discharge Page 16 ECB29 ELECTRIC HEAT A Matchups and Ratings Tables 4 through 16 show all approved CB28UH CB29M and CB30M to ECB29 matchups and electrical ratings B Electric Heat Components ECB29 parts arrangement i
30. for heat W1 of the thermostat and secondary S20 limit switches are closed electric energizes the electric heat relays K32 and K34 with heat elements and HE6 are energized 24VAC 7 K33 1 closes and remains closed until second stage 2 When K32 1 closes the bloweris energized on heat heat demand is satisfied i izer heat relay K43 i ing speed and economizer heat relay K43 is ener THIRD STAGE HEAT gized see 208 230VAC CB schematic DP 3 When K32 2 closes assuming the N C primary remove jumper between W3 and if using third stage S15 and secondary S20 limit switches are 8 When 2 3 closes the unit is ready for a third stage heat closed electric heat element HE1 is energized demand W3 if available of the thermostat sends a third 4 When K34 2 closes assuming the N C primary stage heat demand energizing the electric heat relays S15 and secondary S20 limit switches are K35 and K117 with 24VAC closed electric heat element HE2 is energized 9 When K35 2 and K117 1 close assuming the N C SECOND STAGE HEAT primary S15 and secondary S20 limit switches remove jumper between W2 and R are closed electric heat elements HE4 and 5 are 5 When K34 1 closes the unit is ready for a second stage energized K35 1 closes until third stage heat de heat demand W2 of the thermostat sends a second stage mand is satisfied heat demand energizing the electric heat relays and K116 with 24VAC
31. observe the manometer reading Adjust blower motor speed to deliverthe air desired accord ing 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 CB28UH The CB28UH is not equipped with a motor tap harness like the CB29 30M Blower speed selection is accomplished by changing the individual tap at the harness connector at the blower motor Refer to unit wiring diagram and the blower performance data tables table of contents at the front of this manual For the minimum allowable speed for the CB28UH series units with electric heat refer to ECB29 installation instruc tions CB29M amp CB30M Blower speed tap selection for the CB29M and CB30M units is accomplished by changing the taps at the blower motor harness connector Disconnect harness connec tor from motor to expose speed selectors Blower speed selections are listed the wiring diagrams Refer to the ECB29 installation instructions for minimum allowable blower speed when using electric heat CB28UH UNITS 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 lo
32. 0 100 100 100 ECB29 15CB TA F U E kW 70 000 20 5 71 000 20 8 72 000 21 1 ess o ees narco eese s iren 10076 ECB29 20CB TA F U E kW kW A F U E TAnnual Fuel Utilization Efficiency based on U S DOE test procedures and according to FTC labeling regulations TTCB29M 21 26 thru CB29 46 furnished with disposable frame type filter CB29M 51 and CB29M 65 furnished with cleanable polyurethane frame type filter Includes additional blower motor heat capacity Blower motor is 460v single phase Blower motor is 460v single phase 575v electric heaters are shipped with step down transformer for use with 460v units CB29M 51 amp CB29M 65 models only e 8 amp 9 5 ECB29 25CB ECB29 30CB 8 amp 9 5 8 amp 9 5 5 BLOWER 29 CB29M 21 26 BLOWER PERFORMANCE 208 230v Air Volume and Motor Watts at Specific Blower Taps External Static Pressure Wy m 1 lt N oj N N 4 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance CB29M 31 BLOWER PERFORMANCE 208 230v External Static Pressure 200 totes 515 975
33. 0 1145 200 1135 955 2170 1720 2140 1110 1095 080 1085 880 995 980 865 830 795 55 wj N N 1835 1000 800 640 975 1680 950 1565 740 25 1600 9 1485 700 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance N e o 995 980 965 935 1910 900 1025 1785 865 890 EE 3229074 EZA 2170 2080 7 219807 E 20602 1580 1600 SPECIFICATIONS Wwweam 950039 444041 5004 59828 nim asses sees 3869 5965 3569 Condensate drain connection fpt in mm 2 3 4 19 2 3 4 19 2 3 4 19 2 3 4 19 2 3 4 19 2 3 4 19 Nominal cooling capacity tons kW 2 5 88 3 106 35 6 3 5 17 6 TONES NER dI 10x7 10x8 11x8 11x8 11 5 x 9 12 x 9 ower wheel nominal diameter x width in mm 254 178 254x203 279x203 279x203 292x229 305 x 229 Blower motor output hp W 1 5 149 1 3 249 1 3 249 1 3 249 1 3 249 1 2 373 jin 1 15 x 20 x 1 1 20 x 20 x 1 1 20 x 24x 1 t tNumber and size of filters m 1 381x508x25 1 508 x 508 x 25 1 508 x 610 x 25 Electrical characteristics 60hz ee 29 208 230v 1ph 2 iud 575v 3 ph Sriopng 10669 1749 ren
34. 000 945 885 1880 890 780 1690 1795 655 1480 700 550 2070 980 1020 1970 930 875 1855 875 770 1665 785 645 1460 690 540 2005 945 995 1910 900 855 1795 850 750 1610 760 630 1415 670 530 1935 910 975 1845 870 830 1735 820 730 1555 735 610 1365 645 515 1855 875 950 1775 835 810 1665 785 710 1495 705 595 1310 615 500 1775 840 925 1695 800 785 1595 755 690 1430 675 580 1245 590 485 1690 800 900 1615 765 755 1520 1715 665 1365 645 560 1180 555 470 190 225 1600 755 875 1530 725 730 1440 680 645 1290 610 545 1105 520 455 95 235 1555 735 865 1490 1700 715 1395 660 635 1255 590 535 1070 505 450 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance Page 4 SPECIFICATIONS 29 Model Number CB29M 21 26 CB29M 31 CB29M 41 CB29M 46 CB29M 51 CB29M 65 Net face area ft 2 m 3 11 0 29 3 56 0 33 4 44 0 41 4 44 0 41 5 0 0 46 5 0 0 46 Tube outside diameter in mm 3 8 9 5 3 8 9 5 3 8 9 5 3 8 9 5 3 8 9 5 3 8 9 5 2 2 es Evaporator Coil Fins per inch fins per m 14 551 14 551 14 551 12 472 12 472 12 472 EO mm Taine ntact 3809 3809 3665 3909 3669 3885 Condensate drain connection mm 2 3 4 19 2 3 4 19 2 3 4 19 2 3 4 19 2 3 4 19 2 3 4 19 Nominal cooli
35. 0V 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 sup plies 24VAC to the indoor thermostat and electric 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 K3 doses energizing blower motor B3 on cooling speed Page 42 REFER TO FACTORY BLOWER SPEED SELECTION CHART ON UNIT FOR BLOWER SPEED INFORMATION NEC CEC CLASS 2 3VA USE COPPER CONDUCTORS ONLY REFER TO UNIT RATING PLATE UM CIRCUIT AMBACITY M AND MAXIMUM OVERCURRENT PROTECTION SIZE FIELD MIN EQUIP GROUND 460V ONLY CIRCUIT L2 L3 TERMINAL USED ON 6 J ELECTRIC HEATERS ONLY 575V ONLY CIRCUIT CB30 ONLY LINE VOLTAGE FIELD WIRING CLASS II VOLTAGE FIELD WIRING T26 USED 575V UNITS ONLY A A ECONOMIZER LOOKUP WITH ELECTRIC HEAT L ECONOMIZER HOOKUP LESS ELECTRIC HEAT 5 ON 3 SPEED MOTOR ON 2 SPEED MOTOR BLOWER SPEED SELECTION
36. 1700 38 45 85 300 1280 46 29 14800 46 39 15700 46 17 100 46 32 208 60 20500 46 42 220 67 2290 46 44 280 73 2510 46 45 240 80 2730 46 48 208 75 2560 46 55 _ 2 0 84 2870 46 5 gt 1 2 0 92 3140 46 5 gt 24 3100 3410 46 s 1 208 34 3200 46 2 38 220 108 3580 46 26 40 gt 230 ns 3920 46 27 gt 24 125 4260 46 28 a 208 3840 46 28 4 gt gt 220 126 4800 46 30 48 gt 2 0 135 4700 46 30 49 gt 240 150 51200 46 32 52 208 150 51200 46 of 4 220 168 5730 46 54 48 gt 250 184 62700 46 5 49 240 200 68200 46 s 52 zeros n rsen preter e onore x rmt 240 1 300 1 102400 46 CORN Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at least 167 75 Electric heater capacity only does not include additional blower motor heat capacity eMinimum circuit ampacity for blower motor only Page 27 TABLE 10 ELECTRIC HEAT DATA 3 PHASE 29 41 amp CB29M 46 29 51 amp CB29M 65 Electric Heat kW Number of Volts Minimum Circuit Ampacity Steps Input Model Number
37. 20 23v3phwe amp Shipping Weight 20 69 20500 24 24 22 900 24 __ 25 25 100 24 _ 26 Rm CB29M 41 CB29M 46 eBlower Motor Amps Blower 29 8 seven 3 steps 3 EE NN RN T RN 208 75 25600 24 22 220 84 28700 24 31 J 230 92 31400 24 J x 240 100 34100 24 3 T 208 113 38400 24 42 220 126 43000 24 _ 44 230 135 47000 24 4 240 150 51200 24 eee 2o 6o 20500 36 25 220 67 22900 36 ee 230 73 25100 36 27 xxm 240 80 27300 36 i ___ 208 75 25600 36 2 21 220 84 28700 36 J xx 230 92 31400 36 92 240 100 34100 36 355 J ___ 208 113 38400 36 44 JJ eeo 126 f 4300 36 240 ECB29 10 ECB29 15CB 28K44 9 Ibs 4 kg 28K42 5 2 kg ECB29 15CB 28K44 9 Ibs 4 kg 220 28K42 230 s 2 kg 208 220 230 240 208 220 230 240 208 220 230 240 208 220 230 240 208 220 230 240 208 220 230 240 208 220 230 240 208 220 ECB29 15CB 28K44 9 Ibs 4 kg ECB29 20CB 2845 19 Ibs 9 kg ECB29 25CB CB29M 51 CB29M 65 Refer to National or Canadian Electrical Code manual to determine wire fuse and Electric he
38. 3 with 24VAC When K82 1 closes the blower is energized on heat ing speed and economizer heat relay K43 is ener gized see 208 230VAC CB schematic When K32 1 and K32 2 closes assuming the N C primary S15 and secondary S20 limit switches are closed electric heat elements HE1 and are energized When K33 2 closes assuming the N C primary S15 and secondary S20 limit switches are closed electric heat element HE4 is energized SECOND STAGE HEAT remove jumper between W2 and R 5 Page 51 When K33 1 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 K34 with 24VAC When K34 1 closes the blower if not energized is ener gized on heating speed and economizer heat relay K43 is energized see 208 230VAC CB schematic When K34 2 closes assuming the N C primary S15 and secondary S20 limit switches are closed electric heat element HE2 is energized REFER TO UNIT NA MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVER PROTECTION Size NOTE USE COPPER CONDUCTORS ONLY LINE VOLTAGE FIELD INSTALLED DENOTES OPTIONAL COMPONENTS CIRCUIT LEWNOX S ve VIRING DIAGRAM HEATING UNITS ELECTRIC ECB29 20CB 2 P L ECB29 20CB 208 230V SINGLE PHASE SEQUENCE OF OPERATION 61907 Lennox Industries Inc FIRST STAGE HEAT 1 When there is call for heat W1 of the thermostat SECOND STAG
39. 335 715 335 280 880 200 995 470 495 850 400 345 715 340 295 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance 85 210 905 430 475 765 360 325 640 300 280 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance Page 3 BLOWER CB28UH CB28UH 048 BLOWER PERFORMANCE 208 230V External Air Volume and Motor Watts at Static Specific Blower Taps Pressure Medium Pa L s Watts 00 0 845 800 05 10 835 795 10 25 825 785 15 35 815 775 20 50 805 765 25 60 795 755 30 75 785 745 40 760 725 50 730 705 60 700 680 70 665 660 75 650 650 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance External Static Air Volume and Motor Watts at Specific Blower Taps Pressure Medium High Medium Medium Low Pa cfm L s Watts cfm L s Watts cfm L s Watts 2245 1060 1080 2130 1005 930 2000 945 820 1800 850 695 1565 740 570 2220 1045 1070 2105 995 920 1980 935 815 1780 840 690 1550 730 570 2190 1035 1060 2080 985 915 1955 925 805 1760 830 680 1535 725 565 2165 1020 1050 2055 970 905 1935 910 795 1735 820 670 1520 715 560 2135 1005 1040 2030 960 895 1910 900 785 1715 810 665 1500 710 555 2105 995 1030 2
40. 45 32 42 35 60 46 32 42 35 60 230 13 5 47000 45 32 42 35 60 46 32 42 35 60 240 15 0 51 00 45 32 42 35 60 46 32 42 35 60 20 KW 29 20 11131 4 208 15 0 51200 45 47 41 50 60 46 47 41 50 60 19 Ibs 1 50A amp 1 60A Circuit breaker 220 16 8 57 300 45 53 46 60 60 46 53 46 60 60 230 18 4 62 700 45 53 46 60 60 46 53 46 60 60 240 20 0 68 2200 45 53 46 60 60 46 53 46 60 60 25 kw ECB29 25CB 28K40 6 208 18 8 64 100 45 44 31 31 445 445 445 46 44 31 31 445 445 445 19 lbs 3 Circuit breaker 220 21 071 700 45 49 35 35 50 50 50 46 50 35 35 50 50 50 230 23 0 78 3000 45 49 35 35 50 50 50 46 50 35 35 50 50 50 240 25 0 85 300 45 49 35 35 50 50 50 46 50 35 35 50 50 50 30 kW ECB29 30CB 28K41 6 208 225 76 900 46 51 37 37 60 450 450 19 Ibs 3 60 Circuit breaker 220 25 2 86 000 46 58 42 42 60 60 60 Not Available 230 27 5 94 000 46 58 42 42 60 60 60 240 30 0 102 400 46 58 42 42 60 60 60 THREE PHASE ELECTRIC HEAT CB28UH 048 CB28UH 060 8 kW ECB29 8 28K42 3 208 60 20500 45 27 30 46 27 90 5 lbs Terminal Block steps 220 6 7 22 900 45 30 30 46 30 30 230 7 3 25100 45 30 30 46 30 30 240 80 27 300 45 30 30 46
41. 45 gt l ORANGE 230V EQUIP GROUND REFER TO FACTORY BLOWER SPEED TAI FIELD WIRING FOR ECB SERIES UNITS WITH CIRCUIT BREAKERS CIRCUIT 2 CIRCUIT Lia T 12 gt uer PMEN EQUIPMENT QE E IMENT QE GROUND L3 IS NOT PRESENT ON P ELECTRIC HEATERS THE NUMBER OF CIRCUITS VARY ER MODEL T FOR ACTUAL NUMBER MEL OYED 24V POWER 2 HACK ELECTRIC HEAT K3 1 2 RELAY CONTACTOR BLOWER K45 1 RELAY ECONOMIZER HEAT Ti 11 RO HBL THERM STRIP CLASS IT ECB SERIES DESCRIPTION co KEY ____ JSEAKER ELECT HT CB2 CIRCUIT BREAKER ELECT CBS CIRCUIT BREAKER ELECT IB2 TERMINAL STRIP UNIT MOTOR SPEED TAP CHART 24V COMMON SELECTION CHART ON N L3 CONNECTION USED ON Y UNIT FOR BLOWER SPEED INFORMATION ELECTRIC HEATERS ONLY A NEC CEC CLASS 2 3VA USE COPPER CONDUCTORS REFER TO UNIT LATI R ITY AND OVERCURRENT PROTECTION SIZE LINE VOLTAGE FIELD WIRING CLASS II VOLTAGE FIELD WIRING LENNOX S x WIRING DIAGRAM COILS BLOWER COIL UNITS 3 SPEED MOTOR SHOWN THIS WIRE USED ON T VOLTAGE UNITS ONLY CB29M 21 26 31 41 46 51 65 2 P CB30M 21 26 31 41 46 51 65 2 P CB30U 21 26 31 41 46 51 65 2 P T 0 TION Supersedes Form No New Form No 533 29 534 302W 1999 Lennex Industries Ine Litho U S A B CB29M amp CB30M 2 Units 208 23
42. 60 44 52 46 60 60 THREE PHASE ELECTRIC HEAT CB28UH 036 CB28UH 042 8 kW ECB29 8 28K42 208 60 20500 24 24 25 44 27 30 9S Terminal Block 220 67 22900 24 27 30 44 30 30 230 73 25100 24 27 30 44 30 30 240 80 27 300 24 27 30 44 30 30 10 kW ECB29 10 28K43 3 208 7 5 25600 24 29 30 44 32 35 RIDE Terminal block 220 84 28700 24 33 35 44 36 40 230 92 31400 24 33 35 44 36 40 240 100 34100 24 33 35 44 36 40 15 kw ECB29 15CB 28K44 3 208 11 3 38 400 2 4 42 445 36 45 345 eke 1 50A Cireuit breaker 220 126 43000 24 48 50 36 51 60 230 13 5 47000 24 48 50 36 51 lt lt lt 60 240 150 51200 24 48 50 36 51 60 20 kW ECB29 20CB 28K45 6 208 150 51200 38 29 21 30 430 19 Ibs 2 35A Circuit breaker 220 168 57 300 38 33 24 35 35 Not Available 230 184 62 700 38 33 24 35 35 240 200 68200 38 33 24 35 35 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 Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitab 3 HACR type breaker or fuse 4
43. 85 706 1870 78 66 9 78 825 1560 7 6 s oes 1580 725 9 1960 805 1510 715 05 706 756 705 636 1660 ves 745 6 F8 ___ __ 760 6 _ 8 1705 1365 645 F8 9 786 700 eo 1305 s oe 705 1215 5 1245 585 5 7 8 1375 650 650 1210 570 59 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance Page 7 BLOWER CB29M CB29M 51 BLOWER PERFORMANCE 460v 1 ph External Static Air Volume and Motor Watts at Specific Blower Taps Pressure NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance CB29M 65 BLOWER PERFORMANCE 208 230v External Static Air Volume and Motor Watts at Specific Blower Taps Pressure __ Medium High Medium Wediumiow 45 10 22201045 1070 2105 995 920 1980 555 es 1780 840 690 1550 730 570 20 25 21501035 1060 2080 ses 92 725 e s 265 7020 1050 2055 2155 1005 1040 208 7590 2105 995 200 N olo alo
44. 9M 21 26 31 41 46 51 65 1 P T CB30M 21 26 31 41 46 51 65 1 P THIS WIRE USED ON T VOLTAGE UNITS ONLY CB30U 21 26 31 41 46 51 65 1 P CO 0 29 8 CB30M 1 Units 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 sup plies 24VAC to the indoor thermostat and electric 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 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 41 FIELD WIRING FOR ECB SERIES UNITS WITHOUT CIRCUIT BREAKERS CIRCUIT 3 A A Ay CIRCUIT q LI L a m L2 arma Aua A Ls gt EQUIPMENT A EQUIPMENT GROUND LOCATED IN INDOOR UNIT ba ld gt A a A EQU NENT POWER WIRES FROM 0 STRIP INDOOR UNIT BLUE BLACK COM RED 208V R amp N A VOLTAGE ONLY A LI R 5 A CIRCUIT L2 N 8
45. AT DATA 3 PHASE CB29M 41 29 51 CB29M 65 Blower Coil Electric Heat kW eBlower Mini PAIS Model Model Number Number of vole Motor Number amp Shipping Weight ps 5 460v 3 ph e sm 28700 DAR 2 34 100 43 000 5 28700 43 000 ECB29 20 08049 62 700 71 700 ECB29 25 mao 315 Li 19 nor ERE 23 Li 34 100 28 EU 43 000 L9 15 a 57000 23 Bie Co 25 Er NUM 3steps 460 78 300 DAT E 57500 ms 608051 62 700 dde 65200 1 2 51 E B29 25 18165 8 kg 29 20 28 51 18165 8 kg DOR Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at Tast 167 Electric heater capacity only does not include additional blower motor heat capacity eMinimum circuit ampacity for blower motor only ALL 575v ELECTRIC HEATERS ARE USED WITH CB29M 51 amp CB29M 65 460v MODEL BLOWER COIL UNITS A STEP DOWN TRANSFORMER FOR THE BLOWER COIL UNIT IS FURNISHED WITH ALL 575v ELECTRIC HEATERS ttBlower motor is rated at 460v 29 65 4 o Page 29 TABLE 12 ELECTRIC HEAT DATA 1 PHASE 21 26 amp 31 TMinimum Blower Coil 5 1 Number of aia Circuit Ampacity Model Number oce umber
46. B30M FILTER SIZES C Electrical O Om Fese 1 Check all wiring for loose connections 15 X 20 2 Check circuit breaker located in unit control box CB28UH 030 1 CB29M 31 1 2 381mmX 508mm 3 Check for correct voltage at unit unit operating CB28UH 036 1 042 1 4 Check amp draw on blower motor CB29M 41 1 2 CB29M 46 1 2 20 X 20 29 51 1 29 65 1 508mm 508mm 5 Check to see that heat if applicable is operating CB30M 31 1 2 41 1 46 1 20 X 24 sche 508mm X 610mm 20 X 24 CB30M 51 1 65 2 508mm X 610mm CB28UH 048 1 060 1 mm CB29M 51 2 65 2 0 41 2 46 2 ann Page 40 VIII WIRING DIAGRAMS AND SEQUENCE OF OPERATIONS FIELD WIRING FOR ECB SERIES UNITS WITHOUT CIRCUIT BREAKERS CIRCUIT _ A all LI va d L A uw EQUIPMENT GROUND LOCATED IN INDOOR UNIT a A POWER WIRES FROM FIELD WIRING FOR ECB SERIES UNITS WITH CIRCUIT BREAKERS CIRCUIT 3 Acs A Acz A Lt ef CIRCUIT 2 CIRCUIT cal LD E EA erm S HEATERS THE NUMBER CIRCUITS VARY ACCORDING TO HEATER MODEL REFER TO FAN COIL NAMEPLATE FOR ACTUAL NUMBER EMPLOYED SELECTION CHART ON CONNECTION USED ON Y UNIT FOR BLOWER SPEED ELECTRIC HEATERS ONLY LINE VOLTAGE FIELD WIRING CLASS II VOLTAGE FIELD WIRING LENNIX S ve DIAGRAM COILS BLOWER COIL UNITS CB2
47. E CB30M 41 CB30M 51 amp CB30M 65 Blower Coil Electric Heat kW Number of Volts Btuh Blower TMinimum Circuit Model Model Number Ste Input Input Motor Ampacity Number amp Shipping Weight Ps P P Amps pa 460v 3 ph e ECB29 10 Ga sum EP BG sse ER m ECB29 15 22 23 24 51 29 20 29 25 GE 31 400 ose 47 000 CB30M 65 ECB29 20 25 3 575v 3 ph e MS 550 28 51 3 steps 575 62 700 25 ECB29 25 MN adu w w A a 2 2 m j ojojoj naj nmi j doljo N w w 28K52 3 steps 575 78 300 ECB29 20 28K51 3 steps 575 62 700 B30M ECB29 25 28K52 3 steps 575 78 300 85 300 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 Electric heater capacity only does not include additional blower motor heat capacity Minimum circuit ampacity for blower motor only ALL 575v ELECTRIC HEATERS ARE USED WITH 460v CB30M 51 amp CB30M 65 MODEL BLOWER COIL UNITS A 575v to 460v STEP DOWN TRANS ORMER FOR THE BLOWER COIL UNIT IS FURNISHED WITH ALL 575v ELECTRIC HEATERS Blower motor is rated at 460v IN IN Al aja to c 5l zi
48. E HEAT remove jumper between W2 and R energizes electric heat relays K32 and K33 with 5 When 1 closes the unit is ready for a second stage 24VAC heat demand W2 of the thermostat sends a second 2 When K32 1 closes the blower is energized on heat stage heat demand energizing the electric heat relays ing speed and economizer heat relay K43 is ener K34 and K35 with 24VAC gized see 208 230VAC CB schematic 6 When K34 2 closes assuming the N C primary S15 and 3 When K32 2 closes assuming the N C primary secondary S20 limit switches are closed heating ele S15 and secondary S20 limit switches are ment HE2 is energized K34 1 closes until second stage closed electric heat element is energized heat demand is satified 4 When K33 2 closes assuming the N C primary S15 7 When K35 1 closes assuming the N C primary S15 and secondary S20 limit switches are closed electric heat element HE4 is energized and secondary S20 limit switches are closed electric heat element HE1 is energized Page 52 COMPONENT ARRANGEMENT CB2 OOj DESCRIPTION COMPONENT CIRCUIT BREAKER ELECTRIC HEAT CIRCUIT BREAKER ELECTRIC HEAT CIRCUIT BREAKER ELECTRIC HEAT JELEMENT ELECTRIC HEAT ELEMENT ELECTRIC HEAT ELEMENT ELECTRIC HEAT PLUG ELECTRIC HEAT RELAY SEQUENCER ELECTRIC HEAT RELAY SEQUENCER ELECT
49. E VOLTAGE FIELD INSTALLED DENOTES OPTIONAL COMPONENTS CIRCUIT 2 CIRCUIT 7 a gt gt L2 EQUIPMENT EQUIPMENT GROUND GROUND 1 1 2 gt gt 2 REFER TO UNIT NAMEPLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVER PROTECTION SIZE HEI NOTE USE COPPER CONDUCTORS ONLY LENNOX me WIRING DIAGRAM 10 95 HEATING UNITS ELECTRIC ECB29 12 5CB IBCB P Supersedes Form No New Form No 531 614W 1995 Lennox Industries Inc Litho U S A 29 12 5 15CB 208 230V SINGLE PHASE SEQUENCE OF OPERATION FIRST STAGE HEAT SECOND STAGE HEAT remove jumper between W2 and R 1 When there is a call for heat W1 of the thermostat gizes the electric heat relay K32 with 24VAC 4 When 2 2 closes the unit is ready for a second stage heat demand W2 of the thermostat sends a second 2 When K32 1 closes the blower is energized on heat stage heat demand energizing the electric heat relay ing speed and economizer heat relay K43 is ener K33 with 24VAC gized see 208 230VAC CB schematic 5 When K33 1 K33 2 close assuming the N C 3 Assuming the N C primary S15 and secondary S20 primary S15 and secondary S20 limit switches limit switches are closed electric heat element HE1 is are closed electric heat e
50. L me WIRING DIAGRAM 5 57 HEATING UNITS ELECTRIC 1907 Lennox Industries Inc ECB29 10 2 P ECB29 OCB 2 P New Form No 532 527W Litho U S A H 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 ener gized see 208 230VAC CB schematic 3 K32 3 closes and assuming the N C primary S15 and secondary S20 limit switches are closed electric heat element HE1 is energized SECOND STAGE HEAT remove 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 When K33 2 closes assuming the N C primary S15 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 48 COMPONENT ARRANGEMENT G33 CLA lt 52 DESCRIPTION COMPONENT CIRCUIT BREAKER ELECTRIC HEAT CIRCUIT BREAKER ELECTRIC HEAT ELEMENT ELECTRIC HEAT ELEMENT ELECTRIC HEAT PLUG ELECTRIC HEAT RELAY SEQUENCER ELECTRIC HEAT K33 1 2 RELAY SEQUENCER ELECTRIC HEAT SWITCH LIMIT PRIMARY AUTO RESET SWITCH LIMIT SECONDARY LIN
51. N COIL NAMEPLATE FOR ACTUAL NUMBER EMPLOYED CIRCUIT A CIRCUIT 3 lt L2 i san I EQUIPMENT EQUIPMENT FIELD WIRING FOR ECB SERIES UNITS WITH CIRCUIT BREAKERS CIRCUIT 2 m CIRCUIT CB3 A EQUIPMENT GROUND LOCATED IN INDOOR UNIT CONNECT POWER WIRES FROM HEATER LABELED LI L2 ON P VOLTAGE UNITS 11 12 15 ON Y VOLTAGE UNITS TO TB2 TERMINAL STRIP IN INDOOR UNIT d REFER TO FACTORY BLOWER SPEED LINE VOLTAGE FIELD WIRING CLASS II VOLTAGE FIELD SELECTION CHART ON LENNOX mi tne WIRING DIAGRAM 1 05 COILS BLOWER COIL UNITS CB28UH 018 024 030 036 042 048 060 230 1 New Form Ne 335W D 2003 Litho U S A WIRING D CB28UH 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 sup plies 24VAC to the indoor thermostat and electric 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 Economizer relay if used is energized after K32 1 closes see electric heat section 6 K43 1 closes energizing the economizer with 24VAC COOLING 5 7 When there is a call for cooling G of the thermost
52. No 531 617W 1995 Lennox Industries Inc Litho U S A G ECB29 10 10CB 208 230V SINGLE PHASE SEQUENCE OF OPERATION FIRST STAGE HEAT SECOND STAGE HEAT 1 When there is a call for heat W1 of the thermostat ener remove jumper between W2 and R gizes the electric heat relay K32 with 24VAC 4 When K32 2 closes the unit is ready for a second stage 2 When 2 1 closes the blower is energized on heat pear demand hermiosiat sends stage heat demand energizing the electric heat relay ing speed and economizer heat relay K43 is ener K33 with 24VAC gized see 208 230VAC CB schematic 3 Assuming the N C primary S15 and secondary S20 5 When K33 1 closes assuming the N C primary 515 limit switches are closed electric heat element HE1 is en and secondary S20 limit switches are closed electric ergized heat element HE2 is energized Page 47 COMPONENT ARRANGEMENT CB OR TB oo ON _____________ 5 _________ KEY Ter rrr Aka ECB29 10CB UNITS ECB29 OKW UNITS EQUIPMENT GROUND A Z CONNECT POWER WIRES REFER TO UNIT NAMEPLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVER PROTECTION SIZE Z EQUIPMENT GROUND IS LOCATED IN INDOOR UNIT NOTE USE COPPER CONDUCTORS ONLY LINE VOLTAGE FIELD INSTALLED DENOTES OPTIONAL COMPONENTS A CIRCUIT LENNOX S
53. ONENTS REFER TO UNIT NAMEPLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVER PROTECTION SIZE LENNOX Petrie ne WIRING DIAGRAM HEATING UNITS ELECTRIC 29 8 10 2 29 5CB 2 Y New Form No 532 529W Litho U S A P ECB29 5 8 10 15CB 208 230V THREE PHASE SEQUENCE OF OPERATION 1 When there is a call for heat W1 of the thermostat energizes the electric heat relays K32 K33 and K34 with 24VAC 2 When 2 1 and or K33 1 closes the blower is energized on heating speed and economizer heat relay K43 is ener gized see 208 230VAC CB schematic 3 When K32 2 K33 2 and K34 1 closes assuming the N C primary S15 and secondary S20 limit switches are closed electric heat elements HE1 HE2 and are energized Page 56 COMPONENT ARRANGEMENT 62 2 54 522 cO CORO QN K 32 QX 0 N fn LI E j p K35 DESCRIPTIO CIRCUIT BREAKERS UNIT 1 CIRCUIT BREAK RIC HEAT 2 CRT 2 35A CIRCUIT BREAK RIC HEAT ELEMENT ELECT ELEMENT ELECT ELEMENT ELECT PLUG ELECTRIC RELAY RIC HEAT RELAY SEQUENC ELECTRIC HEAT ELECTRT 2 RELAY SEQUENCER C HEAT 2 RELAY SEQUENC RIC HEAT SWITCH LIMIT
54. OR C4 BLOWER BLOWER MOTOR WHEEL B3 FIGURE 5 I Blower Motor B3 All CB28UH CB29M and CB30M units use single phase di rect drive blower motors with a run capacitor Figure 5 shows the parts arrangement All motors use multiple speed taps Typically the high speed tap is energized dur ing normal operation The horse power for each blower mo tor 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 fac tory 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 460 Volt Blower Motor Windings A third tap blue on 460 volt motors is used for internal wir ing during low speed operation and must not be connected to line voltage During low speed yellow tap operation the high speed black tap is disconnected from line voltage and is connected to the blue internal wiring tap This is done by the blower relay K3 For more information refer to Ser vice and Application Note Corp 8909 L7 on 460 volt blow er motor windings J Blower Motor Capacitor C4 All CB28UH CB29M and series units use single phase direct drive motors with a run capacitor The run capaci tor is mounted on the blower housing See figure 5
55. ORTANT Improper installation adjustment alteration service or maintenance can cause property damage person al injury or loss of life Installation and service must be performed by a qualified installer or service agency 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 discon nect switch es Unit may have multiple power supplies Technical Publications Page 1 CB30M s Table of Contents CB28UH Specifications Blower Data CB29M Specifications Blower Data CB30M Specifications Blower Data Parts Arrangement Application Unit Components Optional Electric Heat IV Configuration Modification Ve Start t Mu Seen eee VI Typical Operating Characteristics VII Maintenance VIII Wiring lt 1997 Lennox Industries Inc Litho U S A SPECIFICATIONS CB28UH Model Number Nominal tonnage Suction vapor line o d in mm sweat Liquid line in mm sweat Condensate in mm fpt Net face area 2 m Tube outside
56. PRIMARY LIMIT S15 ELECTRIC HEAT amp SECONDARY LIMIT S20 SEQUENCER RELAY K32 FIGURE 8 ECB29 20CB 208 230 SINGLE PHASE EE UAS ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT ELECTRIC HEAT ELECTRIC HEAT lt GUENCERBEERT 4 ELEMENT HE3 VESTIBULE PANEL K33 PRIMARY LIMIT S15 amp SECONDARY LIMIT S20 ELECTRIC HEAT ELEMENT HE2 ELECTRIC HEAT ELEMENT HE1 CIRCUIT BREAKER CB PRIMARY LIMIT S15 amp SECONDARY LIMIT S20 ELECTRIC HEAT SEQUENCER RELAY K32 ELECTRIC HEAT SEQUENCER RELAY K34 FIGURE 9 Page 20 29 20 25CB 208 230 THREE PHASE ELECTRIC HEAT ECB29 25CB 30CB 208 230 SINGLE PHASE ELEMENT HE1 amp HE2 ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT lt 2 ELECTRIC HEAT ELEMENT HEB 42 HEN SEQUENCER RELAY K33 WED ELECTRIC HEAT VESTIBULE PANEL Na PRIMARY E 3 amp SECONDARY LIMIT S20 S CIRCUIT BREAKER CB2 CIRCUIT BREAKER PRIMARY LIMIT S15 amp SECONDARY LIMIT S20 ELECTRIC HEAT SEQUENCER RELAY K32 ELECTRIC HEAT SEQUENCER RELAY K35 ELECTRIC HEAT SEQUENCER RELAY K34 ELECTRIC HEAT SEQUENCER RELAY K116 CIRCUIT BREAKER FIGURE 10 ECB29 20 25 575V THREE PHASE ECB29 10 15 20 25 460V THREE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT 72 ELECTRIC HEAT ELECTRIC HEAT LIMIT S20 2 ELEMENT 1 VESTIBULE PANEL gt P SS 2 P
57. RIC HEAT 2 RELAY SEQUENCER ELECTRIC HEAT 2 RELAY SEQUENCER ELECTRIC HEAT RELAY SEQUENCER HEAT SWITCH LIMIT PRIMARY AUTO RESET SWITCH LIMIT SECONDARY CIRCUIT 3 A S20 CIRCUIT 2 CIRCU KW IT BREAKERS AMPS 25KW 30KW NOTE USE COPPER CONDUCTORS ONLY LINE VOLTAGE FIELD INSTALLED lt DENOTES OPTIONAL COMPONENTS CIRCUIT L T Li EET 12 L2 EQUIPMENT EQUIPMENT GROU GROUND T REFER TO UNIT NAMEPLATE FOR MAXIMUM OVER PROTECTION SIZE LENNOX tetris 1c WIRING DIAGRAM 10 95 HEATING U ITS ELECTRIC ECB29 25CB 30CB I P Supersedes Form No New Form No 551 618W 1995 Lennox Industries Inc Litho U S A M ECB29 25CB 30CB 208 230V SINGLE PHASE SEQUENCE OF OPERATION FIRST STAGE HEAT 42 When there is a call for heat W1 of the thermostat energizes the electric heat relays K32 and K34 with 24VAC When 2 1 closes the blower is energized on heat ing speed and economizer heat relay K43 is ener gized see 208 230VAC CB schematic When K32 1 and K32 2 closes assuming the N C primary S15 and secondary S20 limit switches are closed electric heat elements HE1 and HE2 are energized SECOND STAGE HEAT remove jumper between W2 and R 4 When K34 1 closes the unit is ready for a second stage heat d
58. Steps oor 208 230v 1 ph 28K30 1 step ECB29 5 ECB29 5CB 4 Ibs 2 kg ECB29 8 29 8 5 Ibs 2 kg 12 800 208 ECB29 10 28K35 220 ECB29 10CB 28K36 5 Ibs 2 kg 30 240 208 ECB29 5 28K31 22 ECB29 5CB 28K32 230 4 Ibs 2 kg 14 300 LU gt 15 700 240 17 100 2 20 500 29 8 28 33 220 29 8 28 34 230 5 Ibs 2 kg 22 900 ECB29 10 ECB29 10CB 5 Ibs 2 kg 28 7 CB30M 31 8 7090 240 34 100 208 32 000 ECB29 12 5CB 20 35 800 28K37 10 Ibs 5 kg 230 39 200 240 42 600 208 38 400 29 15 220 43 000 28K38 10 Ibs 5 kg 230 47 000 240 51 200 TRefer 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 T Electric heater capacity only does not include additional blower motor heat capacity 2 Minimum circuit ampacity for blower motor only o e xm s pom Dm e m BENE Page 30 TABLE 13 ELECTRIC HEAT DATA 1 PHASE CB30M 41 amp CB30M 46 Electric Heat kW Model Number amp Shipping Weight Blower Coil Model Number ECB29 5 28K31 ECB29 5CB 28K32 4 Ibs 2 kg ECB29 8 28K33 ECB29 8CB 28K34 5 Ibs 2 kg ECB29 10 28K35 ECB29 10CB 28K36 5 Ibs 2 kg CB30M 41 ECB29 12 5CB
59. UH 018 024 BLOWER PERFORMANCE 208 230V Air Volume and Motor Watts at Specific Blower Taps Watts 00 05 0 10 1025 485 375 1010 480 370 995 470 365 975 460 360 955 450 350 935 440 345 910 430 335 855 405 320 790 375 305 720 340 290 635 300 270 595 280 260 885 415 305 880 415 305 870 410 300 855 405 295 840 395 290 825 390 280 805 380 275 750 355 255 690 325 240 615 290 220 530 250 205 485 230 195 690 690 685 680 670 660 645 605 555 495 420 380 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance 240 240 240 235 230 230 225 210 195 180 165 160 External Static Pressure High in w g Pa Medium Air Volume and Motor Watts at Specific Blower Taps L s Watts cfm Watts cfm L s Watts 00 0 05 10 10 25 15 35 20 50 25 60 130 75 40 100 1210 570 445 1200 565 445 1105 520 400 980 465 370 1100 520 395 980 460 370 1185 560 440 1095 515 390 975 460 365 1170 550 430 1080 510 385 965 455 360 1150 540 425 1065 500 375 955 450 350 1100 520 410 1020 480 360 920 435 330 50 125 955 450 370 890 420 315 805 380 285 60 150 865 410 350 800 380 290 725 345 260 170 175 760 360 325 695 330 265 635 300 235 75 185 705 335 315 640 300 250 580 275 225 NOTE All air data is measured external to unit with air filter in place Electr
60. an in place See figure 13 side view 1 Apply two pieces of foam tape provided down both ends of each shield The tape should measure 4 3 4 X 2 120 X 25 mm Ensure that the tape covers both sides of the shield equally 2 Apply the longer piece of foam tape between the pieces on each end This piece of tape is 1 wide FIGURE 14 Page 35 DOWNFLOW DRIP SHIELDS CB29 30 without foam tape Drip Shield Drip Pan CB29 with foam tape ee Drip Shield FIGURE 15 7 Set unit so that it is level Connect return and supply air plenums as required using sheet metal screws A WARNING If electric heat section with circuit breakers ECB29 are applied to downflow CB29M or CB30M unit the circuit breakers must be rotated 180 to the UP position See ECB29 installation in structions for more details NOTE For downflow application metal or class supply and return air plenums must be used For downflow installation on combustible flooring an addi tive base must be used See figure 16 COMBUSTIBLE FLOOR ADDITIVE BASE PROPERLY SIZE FLOOR OPENING FIGURE 16 Cut an opening appropriately sized for combustible base Base dimensions are shown in figure 17 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 in sulat
61. at ener gizes blower relay K3 and the economizer if used 8 K3 doses energizing blower motor B3 on cooling speed Page 44 COMPONENT ARRANGEMENT OR TB OO DESCRIPTION KW COMPONENT 5 CIRCUIT BREAKER ELECTRIC HEAT 8 ELEMENT ELECTRIC HEAT FOR USE WIT 3 PLUG ELECTRIC HEAT CIRCUIT BREAKERS RELAY SEQUENCER ELECTRIC HEAT ONLY SWITCH LIMIT PRIMARY AUTO RESET LL LINE VOLTAGE FIELD INSTALLED SWITCH LIMIT SECONDARY TERMINAL BLOCK UNIT DENOTES OPTIONAL COMPONENTS NOTE USE COPPER CONDUCTORS ONLY LI CIRCUIT L2 2 ECB29 2 5 5 8KW UNITS 29 5 8 UNITS N EQUIFMENT GROUND A CONNECT POWER WIRES LED LI A TERMINAL STRIP ON HEATER PLATE REFER TO UNIT NAMEPLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVER PROTECTION SI EQUIPMENT GROUND 15 LOCATED IN INDOOR UNIT SKW ONE ELEMENT LENNOX ine WIRING DIAGRA HEATING UNITS ELECTRIC ECB29 2 5 5 8 1 P ECB29 5CB 8CB 1 P Supersedes Form New Form No 531 616W 1995 Lennox Industries Inc Litho U S A E ECB29 2 5 5 5CB 8 8CB 208 230V 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 secondar
62. ater capacity only does not include additional blower motor heat capacity eMinimum circuit ampacity for blower motor only 28K42 s 2 Kg ECB29 10 ECB29 15CB 28K44 9 Ibs 4 kg N N o 29 20 29 25 28 4 8 46 6 steps 19028 9 lo 60 67 7 3 E _7 5 84 92 EE AM 3 6 38 38 38 38 38 38 38 38 113 38400 98 126 43000 98 135 4700 38 150 51200 98 150 51200 98 168 57300 98 at 1 62700 210 71700 38 230 78300 98 250 85300 98 46 46 46 46 46 46 46 46 46 46 46 46 46 46 _ 46 60 67 73 80 27300 75 84 92 109 10 0 34 100 20 500 22 900 25 100 25 600 28 700 31 400 10 0 34 100 S i8 I gt o o o 5 8 rS o o1 NJ O1F D O1 CO 2 co 4 ORI MD 5 S co disconnect size requirements Use wires suitable for at least 1 Page 28 no TABLE 11 ELECTRIC HE
63. cation for new speed re fer to unit wiring diagram Insert wire terminal until it is securely in place See figure 26 6 Replace harness connector to motor BLOWER SPEED TAP SELECTION CB29M and CB30M ONLY HARNESS CONNECTOR DEPRESS RELEASE WIRE TERMINAL SELECT CONNECTOR LOCATION FOR NEW SPEED REFER TO UNIT WIRING DIAGRAM INSERT WIRE UNTIL IT IS SECURELY IN PLACE FIGURE 26 Page 39 VII MAINTENANCE To remove filter loosen the thumbscrews holding the fil ter panel in place Slide filter out of the guides on either A WARNING side of cabinet insert new filter and replace panel Some models come with a spacer so standard size filters can Disconnect power before performing any be used Filters should be inspected monthly and must maintenance be replaced when dirty to ensure proper blower coil op At the beginning of each heating cooling season the sys eration See table 17 for replacement filter sizes see tem should b checked as follows the sticker located on the filter access door specifying A Filters the size of the standard throw away filter which is used with the unit B Supply Air Blower 1 Check and clean blower wheel Filter access panel must be in place during unit operation Excessive warm air entering the unit may re sult in water blow off problems 1 2 Motors are prelubricated for extended life no further lu 4 brication is required CB29M and C
64. d 6 When K34 1 closes assuming the N C primary S15 and secondary S20 limit switches are closed heating element HE3 is energized K34 1 closes until second stage demand is satisfied Page 50 5 524 COMPONENT ARRANGEMENT EN k33 H 9 4 K32 0 A DESCRIPTION OMP CIRCUIT BREAKER ELECTRIC HEAT CIRCUIT BREAKER ELECTRIC HEAT ELEMENT ELECTRIC HEAT ELEMENT ELECTRIC HEAT PLUG ELECTRIC HEAT RELAY SEQUENCER ELECTRIC HEAT RELAY SEQUENCER ELECTRIC HEAT RELAY NCER IC HEAT SWITCH LIMIT PRIMARY AUTO RESE SWIICH LIMIT SECONDARY CIRCUIT 2 A m REFER TO UNIT PROTECT CIRCUI OVER NOTE USE COPPER ON SIZE CONDUCTORS ONLY LINE VOLTAGE FIELD INSTALLED DENOTES OPTIONAL COMPONENTS EQUIPMENT GROUND LI L2 EQUIPMENT GROUND CBI 3 LENN XS WIRING DIAGRAM H EATING UNITS ELECTRIC ECB 29 20CB P Supersedes Form No New Form No 531 615W 1995 Lennox Industries Inc Litho U S A K ECB29 20CB 208 230V SINGLE PHASE SEQUENCE OF OPERATION FIRST STAGE HEAT 1 When there is a call for heat W1 of the thermostat energizes the electric heat relays K32 and K3
65. diameter in mm Number of rows Fins per inch fins per m Wheel nominal diameter x width in mm Blower motor output hp W General Data Connections Evaporator Coil Blower CB28UH 030 2 5 3 4 19 3 8 9 5 2 3 4 19 3 56 0 33 3 8 9 5 2 14 551 10x 7 254 x 178 1 8 249 CB28UH 036 3 3 4 19 3 8 9 5 2 3 4 19 4 44 0 41 3 8 9 5 2 14 551 10x8 254 x 203 1 3 249 CB28UH 018 024 1 5 2 5 8 16 3 8 9 5 2 3 4 19 3 11 0 29 3 8 9 5 2 14 551 10 x 7 254 x 178 1 5 149 T Filters Electrical Data 60hz Size of filter in mm Voltage phase Minimum circuit ampacity unit only 2 Maximum overcurrent protection unit only Shipping Data 1 package Ibs kg 121 Tus Optional Accessories Must Be Ordered Extra Electric Heat Filter Base 76 mm base height 1 or 2 in thick filters 25 or 51 mm 6 in 152 mm base height Catalog Number 1 2 or 4 in thick filters 25 51 or 102 mm Model Number Catalog Number Model Number 20 x 20 x 1 508 x 508 x 25 208 230 1 3 15 156 71 15 x 20 x 1 381 x 508 x 25 208 230 1 2 15 x 20 x 1 381 x 508 x 25 208 230 1 3 15 123 56 2 5 to 30 kW See Electric Heat Data tables 32X54 32X54 32X55 ACE1620 3 ACE1620 3 ACE2020 3 62 00 62 00 62 01 1620 6 1620 6 2020 6 Cabinet Size W x D in mm Size of field provided filter in mm
66. emand W2 of the thermostat sends a second stage heat demand energizing the electric heat relays K33 and K116 with 24VAC 5 When K33 1 closes the blower if not energized is ener gized on heating speed and economizer heat relay K43 is energized see 208 230VAC CB schematic When K33 2 and K116 1 close assuming the N C primary S15 and secondary S20 limit switches are closed electric heat elements HE3 and HE6 are energized THIRD STAGE HEAT remove jumper between W3 and R if using third stage 7 53 When K34 2 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 relay K35 with 24VAC When K35 1 and K35 2 close assuming the N C primary S15 and secondary S20 limit switches are closed electric heat elements HE4 and 5 are energized NOTE USE COPPER CONDUCTORS ONLY R ELECTRIC HEA LINE VOLTAGE FIELD INSTALLED T DENOTES OPTIONAL COMPONENTS _____ LENNOX Sire ve WIRING DIAGRAM 5797 H NAMEPLATE FOR MINIMUM CIRCUIT HEATING UNITS ELECTRIC AMPACITY AND MAXIMUM OVER PROTECTION SURG ECB29 25CB 30CB 2 P New Form No ee D1997 Lennox Industrice Inc Lithe U S A N ECB29 25CB 30CB 208 230V SINGLE PHASE SEQUENCE OF OPERATION FIRST STAGE HEAT 6 When K33 2 and K16 1close assuming primary 515 1 When there is a call
67. er Motor Full Load Amps 1 Electric heater capacity only does not include additional blower motor heat capacity Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at least 167 75 3 HACR type breaker or fuse Bold text indicates that the circuit breaker on CB circuit breaker models must be replaced field provided with size noted Page 24 TABLE 7 ELECTRIC HEAT DATA 1 PHASE 29 21 26 amp CB29M 31 Electric Heat kW Model Number amp Shipping Weight Blower Coil Model Number ECB29 2 5 28K30 4 Ibs 2 kg ECB29 5 28K31 ECB29 5CB 28K32 4 Ibs 2 kg CB29M 21 26 ECB29 8 28K33 ECB29 8CB 28K34 5 Ibs 2 kg ECB29 10 28K35 ECB29 10CB 28K36 5 Ibs 2 kg ECB29 5 28K31 ECB29 5CB 28K32 4 Ibs 2 kg ECB29 8 28K33 ECB29 8CB 28K34 5 Ibs 2 kg ECB29 10 28K35 ECB29 10CB 28K36 5 Ibs 2 kg CB29M 31 ECB29 12 5CB 28K37 10 Ibs 5 kg ECB29 15CB 28K38 10 Ibs 5 kg Number of Steps eBlower Motor Amps Minimum Volts Circuit Ampacity Input 208 230 1 ph m 8 Peo as se pom 7 8 pom o o pomme 7 se ome 8 e 8 ore
68. er between W2 and R 5 Page 57 When K34 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 relays K33 and K35 with 24VAC When K33 1 closes the blower if not energized is energized on heating speed and economizer heat relay K43 is energized see 208 230VAC CB sche matic When K33 1 K35 1 and 5 2 contacts close assum ing the primary 515 and secondary S20 limit switches are closed electric heat elements HE4 HE5 and HE6 are energized COMPONENT ARRANGEMENT wr IWS HH OHH DESCRIPTION KEY COMPONENT F3 FUSE ELECTRIC HEAT ELEMENT ELECTRIC HEAT 5 e KI15 1 CONTACTOR ELECTRIC HEAT 36 1 2 5 RELAY HEAT BLOWER PLUG ELECTRIC HEAT ite SWITCH LIMIT PRIMARY_ AUTO RESET S20 SWITCH LIMIT SECONDARY ELECT HT TBS TERMINAL BLOCK ELECTRIC HEAT A LI Q E 12 2H 5 L3 e jH F3 TBS ZX FUSE SIZE CHART 15 1 K36 3 3 9 EQUIPMEN FUSE 6 GROUND UNIT VOLTAGE 29 101 9 j 29 15 8 279 NOTE USE COPPER CONDUCTORS ONLY 29 20 ECB29 25 Z REFER TO UNIT
69. gizes the electric heat relay 2 with 24VAC and the secondary S20 limit switches are closed 2 When K32 1 closes the blower is energized on heat electric heat element HE1 is energized ing speed and economizer heat relay K43 is ener gized see 208 230VAC CB schematic Page 46 COMPONENT ARRANGEMENT 38 CB OR OO DESCRIPTION AMPS COMPONENT 60A CIRCUIT BREAKER ELECTRIC HEAT LEMENT ELECTRIC HEAT FOR USE WITH PLUG ELECTRIC HEAT CIRCUIT BREAKERS RELAY SEQUENCER ELECTRIC HEAT ONLY RELAY SEQUENCER ELECTRIC HEAT _ SWITCH LIMIT PRIMARY AUTO RESET NOTE UGE SWITCH LIMIT SECONDARY CONDUCTORS ONEN LINE VOLTAGE FIELD INSTALLED DENOTES OPTIONAL COMPONENTS LI H mj Am circuit 4 TERMINAL BLOCK UNIT L2 a _ 2 lt L2 lt gt 8 5 ECB29 10KW UNITS EQUIPMENT A GROUND A CONNECT POWER WIRES FROM UNT LABELED LI AND L2 TO TB2 TERMINAL STRIP HEATER PLATE REFER TO UNIT NAMEPLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVER PROTECTION SIZE EQUIPMENT GROUND IS LOCATED IN INDOOR UNIT LENNOX 2 me WIRING DIAGRAM HEATING UNITS ELECTRIC 29 10 1 29 10 1 Supersedes Form New Form
70. he left and set into place Replace coil assembly Secure coil in place by bend ing down tab on cabinet support rail See figures 20 1 Discard drip shields if applicable The shields are used and 22 Tor downtlow applications only LEFT HAND DISCHARGE CONFIGURATION 2 Pull coil assembly from unit Pull off the horizontal drain SECURING TAB ON CABINET HORIZONTAL pan SUPPORT RAIL DRIP SHIELD 3 Remove drain plugs from back drain holes on horizon q tal drain pan and re install them on front holes 4 Rotate drain pan 180 front to back and install it on the lt E opposite side of coil 5 Remove screws from top cap Remove horizontal drip AH NOTE For horizontal applications a secondary drain pan is recommended Refer to local codes shield screw located in the center of the back coil end HORIZONTAL seal See figure 20 DOWNFLOW RAIL DRAIN PAN 6 Rotate horizontal drip shield 180 front to back FIGURE 22 1 NOTE For horizontal applications in high humidity 7 Remove plastic plug from left hole on coil front end areas remove the downflow rail closest to the drain pan seal and re install plug in back hole Re install hori To remove rail remove screw from rail at back of unit and zontal drip shield screw in front coil end seal Drip at cabinet support rail Remove downflow rail then replace shield should drain downward into horizontal drain screws Also seal aro
71. hermostat set to UNOCCUPIED mode off power to unit All access panels and covers must be in place and secured The condensate assembly should be clean and dry for extended period shutdown Page 38 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 con trol system 2 Generally blower operation is set at thermostat sub base fan switch With fan switch in ON position blower operates continuously With fan switch in AUTO posi tion blower cycles with demand 3 In all cases blower and entire unit will be off when the system switch is in OFF position B External Static Pressure 1 Measure tap locations as shown in figure 25 STATIC PRESSURE TEST SUPPLY UNIT SHOWN IN HORIZONTAL DIS CHARGE LEFT POSITION FIGURE 25 2 Punch a 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 re turn duct as above For systems with non ducted re turns leave the other end of the manometer open to the atmosphere 3 With only the blower motor running and the evapora tor coil dry
72. i N e e o NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance CB30M 31 BLOWER PERFORMANCE 208 230v External Static Pressure 1230 580 360 540 285 1180 555 270 1115 525 445 340 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance CB30M 41 BLOWER PERFORMANCE 208 230v External Static Air Volume and Motor Watts at Specific Blower Taps Pressure 255 390 255 245 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance BLOWER CB30M 41 BLOWER PERFORMANCE 460v External Static Air Volume and Motor Watts at Specific Blower Tap Pressure 5 Low alaAl olin i a NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance CB30M 46 BLOWER PERFORMANCE 208 230v External Static Air Volume and Motor Watts at Specific Blower Taps Pa im oue wats us wate om 1 39 9 m T 99 p 9 5 39 1790 e 55 1588 _ 1365 o9 oes 480 745 630 59 s o one se 1540 728 1300
73. ic heaters have no appreciable air resistance CB28UH 036 BLOWER PERFORMANCE 208 230V Air Volume and Motor Watts at CB28UH 042 BLOWER PERFORMANCE 208 230V Air Volume and Motor Watts at Specific Blower Taps External Specific Blower Taps Pressure High Medium Low Pressure Low in wg Pa 1 6 Watts 1 6 Watts cfm 1 6 Watts in w g 1 6 Watts cfm 1 6 Watts cfm 1 6 Watts 00 0 1495 705 650 1110 525 510 895 420 415 1750 825 725 1495 705 580 1250 590 520 05 10 1485 700 640 1120 530 510 910 430 415 1740 820 720 1495 705 580 1255 595 520 10 25 1475 695 625 1130 530 510 920 435 410 1725 815 710 1490 700 575 1255 590 500 15 35 1460 690 615 1130 535 510 925 435 400 1700 805 700 1475 695 565 1250 590 490 20 50 1445 680 600 1130 535 505 930 440 390 20 50 1675 790 690 1460 690 550 1235 585 475 25 60 1425 670 585 1130 535 475 930 440 380 25 60 1645 775 680 1435 675 535 1220 575 460 30 75 1405 660 570 1125 530 465 925 435 370 30 75 1610 760 665 1405 665 520 1200 565 445 40 100 1355 640 540 1100 520 435 905 425 350 40 100 1525 720 635 1335 630 490 1140 540 415 50 125 1295 610 510 1060 500 405 870 410 330 50 125 1420 670 605 1245 585 455 1065 505 385 60 150 1230 580 480 1010 475 380 820 385 310 1135 535 420 970 455 355 170 175 1150 545 450 945 445 350 750 355 290 70 175 1155 545 535 1000 470 380 850 400 325 75 185 1110 525 435 905 430
74. ic heaters have no appreciable air resistance CB30M 65 BLOWER PERFORMANCE 460v 1 ph External Static Air Volume and Motor Watts at Specific Blower Taps Pressure N 710 F9 38 oe 5 o s e a e 88 38 e 28 99 o ma 39 99 99 NOTE All air data is measured external to unit with air filter in place Electric heaters have no appreciable air resistance CB28UH CB29M 4 CB30M PARTS ARRANGEMENT ELECTRIC HEAT SECTION CONTROL BOX BLOWER ACCESS PANEL BLOWER COMPARTMENT HORIZONTAL DRAIN PAN ACCESS PANEL gt EXPANSION VALVE a COMPLETE WITH SCREEN CB28UH units have a one piece blower coil access panel FIGURE 1 Page 13 CB29M 1 CB30M 1 CONTROL BOX SMALL ELECTRIC HEAT KNOCK OUT FOR TERMINAL 2 5 15 kW LARGE ELECTRIC HEAT STRIP TB1 KNOCK OUT FOR 20 30 kW BLOWER RELAY K3 GROUNDING LUGS TRANSFORMER T26 575 VOLT ONLY TRANSFORMER 1 TERMINAL STRIP BRACKET FOR DOOR INTERLOCK TBI SWITCH 551 1 TERMINAL STRIP 460 amp 575V only FIGURE 2 CB28UH CB29M 2 and CB30M 2 CONTROL BOX TRANSFORMER BLOWER TU RELAY K3 GROUNDING A LUGS o TERMINAL STRIP TB1 FIGURE 3 Page 14 I APPLICATION
75. ion strips Seal around the insulation strips with perma gum The unit is now locked in place Install retum air plenum and secure with sheet metal screws DOWNFLOW COMBUSTIBLE BASE DIMENSIONS 18 1 4 464 CB29M 21 26 amp 31 CB30M 21 26 23 1 4 591 CB29N 41 65 CB30M 31 65 15 381 20 508 29 21 26 amp 31 29 41 65 0 21 26 CB30M 31 65 22 1 8 ae 562 13 3 8 340 Opening Y 26 SIDE VIEW FIGURE 17 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 Nofurther adjustment is necessary Set unit so it is sloped towards the drain pan 1 4 6mm See fig ure 18 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 support 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 DRIP SHIELD gt HORIZONTA DRAIN PAN FIGURE 18 Page 36 3 If hanging the unit it must be supported along the entire 8 Rotate top cap 180 fr
76. lements HE2 and are energized energized Page 49 CB 2 50 E 30A OO KEY COMPONENT __________ CDI TCIRCUIT BREAKER ELECTRIC HEAT ICD2 CIRCUIT DREAKER ELECTRIC HEAT IHES 4 ELEMENT ELECTRIC HEAT P2 ECTRIC HEA DENOTES OPTIONAL COMPONENTS CIRCUIT 2 CIRCUIT LI T lt a PN N L2 gt L2 a EQUIPMENT WS IMUM PROTECTION SIZE NOTE USE COPPER CONDUCTORS ONLY LENNOX S ss WIRING DIAGRAM 5 97 HEATING UNITS ELECTRIC ECB29 12 5CB 2 New Form No Serene 542 524 1997 Lennox Industries Inc Litho U S A J ECB29 12 5CB 15CB 208 230V SINGLE PHASE SEQUENCE OF OPERATION FIRST STAGE HEAT SECOND STAGE HEAT 1 When there is call for heat W1 of the thermostat ener remove jumper between W2 and R gizes electric heat relays K32 and K33 with 24VAC 4 When K33 1 closes the unit is ready for a second stage heat demand When K33 2 closes assuming the N C primary S15 and secondary S20 limit switches are closed electric heat element HE1 is energized 2 When 2 1 closes the blower is energized on heat ing speed and economizer heat relay K43 is ener 5 W2 ofthe thermostat sends second stage heat de 3 When K32 2 closes assuming the N C primary S15 mand energizing electric heat realy K34 with and secondary S20 limit switches are closed electric 24VAC heat element 2 is energize
77. n dently by the corresponding relay located on the electric heat vestibule panel All three phase heating elements are arranged in a three phase delta Once energized heat transfer is instantaneous High tem perature protection is provided by primary and sec ondary high temperature limits Page 18 ECB29 2 5 5 5CB 208 230 SINGLE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT ELECTRIC HEAT VESTIBULE PANEL C HEAT ELEMENT HE1 PRIMARY LIMIT S15 amp SECONDARY LIMIT S20 TERMINAL BLOCK TB2 ELECTRIC HEAT CIRCUIT BREAK SEQUENCER RELAY K32 ER CB1 FIGURE 6 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 CIRCUIT BREAKER CB1 FIGURE 7 Page 19 ECB29 8 10 208 230 THREE PHASE ECB29 12 5CB 15CB 208 230 SINGLE amp THREE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT ELECTRIC HEAT zi n gt ELEMENT ELECTRIC HEAT ELECTRIC HEAT 22 dig ELECTRIC HEAT ro 4 ELEMENT HE2 VESTIBULE PANEL K33 CIRCUIT BREAKER CB1 ELECTRIC HEAT ELEMENT HE1 PRIMARY LIMIT S15 amp SECONDARY LIMIT S20 TERMINAL BLOCK TB2
78. ng capacity tons kW 63 70 25 8 8 3 106 35 6 3 5 17 6 gue 10x7 10x7 10x 8 10x9 11 1 2x9 1 2 9 Blower wheel nominal diameter x width in mm 254x178 254 178 254x203 254x229 292x229 292 x 229 Blower motor output hp W 1 5 149 1 3 249 1 3 249 1 2 373 3 4 560 3 4 560 1 15 x 20 x 1 1 20 x 20 x 1 TtNumber and size of filters Im mm 1 381 x 508 x 25 1 508 x 508 x 25 208 230v 1ph 208 230 1 Ph 208 230v 1 ph 460v 3 ph soe 575y 3 ph Optional Accessories Must Be Ordered Extra Side Return Unit Stand Catalog number 4587 222 ___ se 29 Wall Hanging Bracket Kit Shipping weight Ibs kg 45K30 3 1 Up Flow Only Down Flow Combustible Base Ship wt Ibs kg 3472 80 3473 8 4 gt gt cm Teoma _ 19000 68 1900065 moves 2000068 29 8 28 000 8 2 03 37500 109 35 8 Electrical characteristics 60hz 208 230v 1ph Shipping weight Ibs kg 1 package ECB29 5 ECB29 5CB e 8 amp 9 5 29 10 Output Btuh KW ECB29 10CB TAFUE Electric Heat Capacity 1 phase e 8 amp 9 5 kW ECB29 12 5CB e 8 amp 9 5 kW 53 000 15 5 53 000 15 5 54 000 15 8 54 000 15 8 55 000 16 1 10
79. 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 de sired location Set unit so that it is level Connect return and supply air plenums as required using sheet metal screws See figure 12 UPFLOW CONFIGURATION HORIZONTAL DRAIN PAN UPFLOW DOWNFLOW DRAIN PAN al FOR OPTIMUM PERFORMANCE REMOVE HORIZONTAL DRAIN PAN FIGURE 12 C Downflow Application NOTE CB29M CB30M 21 26 units do not require downflow drip sheilds 1 Remove drip shields with the foam pads from the top of the unit The shields are used for downflow applications only and may need to be field fabricated if no longer with unit 2 Remove coil assembly from unit 3 Remove horizontal drain pan See figure 13 DOWNFLOW DISCHARGE CONFIGURATION FOR OPTIMUM PERFORMANCE REMOVE HORIZONTAL DRAIN PAN DOWNFLOW DRAIN PAN FIGURE 13 4 Rotate cabinet 180 from upright It may be neces sary to first remove the blower assembly to lighten the cabinet for lifting 5 Install downflow drip shield firmly in place on inside of coil slab from under drain pan See figures 14 and 15 6 Replace coil assembly and blower if removed Re place coil access panel If horizontal drain pan is not re moved depress tab in cabinet support rail to hold hori zontal drain p
80. onal or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Use wires suitable for at least 167 75 Electric heater capacity only does not include additional blower motor heat capacity 2 Minimum circuit ampacity for blower motor only Page 31 Blower Coil Model Number CB30M 51 CB30U 51 CB30M 65 CB30U 65 TABLE 14 ELECTRIC HEAT DATA 1 PHASE CB30M 51 amp CB30M 65 Electric Heat kW Model Number amp Shipping Weight ECB29 8 28K33 E B 28K34 4 Ibs 2 kg m ECB29 10 20835 29 10 28 36 5 Ibs 2 kg 29 5 28 31 8 32 4 Ibs 2 kg ECB29 8 28K33 E B 8 34 4 Ibs 2 kg ECB29 5 ECB29 12 5CB ECB29 15CB 28K38 10 Ibs 5 kg ECB29 20CB 28 39 14168 6 kg ECB29 25CB 28K40 18 Ibs 8 kg ECB29 15CB 28K38 10 Ibs 5 kg ECB29 20CB 28K39 14 Ibs 6 kg ECB29 25CB ECB29 30CB 28K41 19 Ibs 9 kg Number of Steps 1 step 5 steps 2 Blower Motor Amps Volts ilBtuh TMinimum Circuit Ampacity Input Input 208 230v 1 ph 208 38 12800 24 26 gt 220 42 14300 24 27 280 46 15700 24 28 gt gt 240 50 1710 24 29 _ _ 208 60 20500 24 39 gt 220 67 2290 24 4 230 73 2510 24 43 240 80 2730 24 4 208
81. ont to back and align with un length of the cabinet If using chain or strap use a piece used screw holes Holes must align with front and of angle iron or sheet metal attached to the unit either back coil end plates Note that top cap has a 45 bend above or below so that the full length of the cabinet is on one side and 90 bend on the other The 90 bend supported Use securing screws no longer than 1 2 must be on the same side as the horizontal drain pan 13mm to avoid damage to coil or filter See figure See figures 20 and 21 19 Connect return and supply air plenums as re NOTE Use extreme care when re installing screws into coil quired using sheet metal screws end plate engaging holes Coil damage could result by mis alignment HANGING HORIZONTAL UNIT FIELD MODIFICATION FOR LEFT HAND DISCHARGE CABINET SUPPORT 1 2 13mm Screws max Electrical Inlet Clearance 41 102 SHEET METAL FRONT VIEW END VIEW FIGURE 19 COIL SHOWN IN UP FLOW POSITION A CAUTION FIGURE 20 Danger of equipment damage and personal injury 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 BACK COIL END SEAL E Horizontal Left Hand FIGURE 21 Discharge Application 9 From the upflow position replace coil assembly Then flip cabinet 90 to t
82. p CB29M 65 Electric Heat kW Model Number Blower Coil Model Number amp Shipping Weight ECB29 5 ed 1 34 ECB29 10 28K35 ECB29 10CB 28K36 5 Ibs 2 Kg CB29M 51 ECB29 20CB 28K39 14168 6 kg ECB29 25CB 28K40 18 Ibs 8 kg ECB29 5 Ee 28K32 4 Ibs 2 kg ECB29 8 aK 34 2 kg ECB29 10 28K35 ECB29 10CB 28K36 5 lbs 2 kg CB29M 65 ECB29 20CB 28K39 14168 6 kg ECB29 25CB ECB29 30CB 28K41 19 lbs 9 1 step 6 steps Minimum Circuit Ampacity 208 230v 1 ph 208 38 12800 38 28 2 9 42 14300 38 29 gt 2 0 46 15700 38 30 24 50 17100 38 31 gt 208 60 2080 38 a 220 67 2290 38 43 gt 23 0 73 2510 38 4 24 80 2730 38 4 gt _ _ 208 75 2560 38 350 2 0 84 28700 38 55 2 0 92 31400 38 55 gt 24 100 3410 38 5 1 208 94 3200 38 24 38 gt 220 108 3580 38 25 40 gt 2x0 115 3920 38 26 a gt 249 125 4260 38 27 gt 208 3840 38 28 4 220 26 ewm 38 208 150 5120 38 50 220 168 5730 38 53 230 184 62700 38 55 240 200 6820 38 5 208 188 64100 38 42 2 0 210 7
83. re rise and automatically resets at 110 F 9 F 43 3 5 0 C on a temperature fall The secondary high temperature limit opens at 333 F 10 F 167 2 C 5 6 C on a temperature rise If the secondary limit opens it will need to be re placed 460 and 575 Volt Electric Heat Sections The 460 and 575 volt electric heat sections are pro tected by three separate high temperature limits one primary S15 and two secondary S20 limits The primary limit is wired in series with the contactor coil K15 while the secondary limits are wired in se ries with the electric heating elements after the con tacts K15 1 When S15 opens all heating elements are de energized If either S20 switch opens the heating output is cut in half If both S20 switches open all heating elements are de energized The primary high temperature limit opens at 150 F 5 F 65 5 C 2 8 C on a temper ature rise and automatically resets at 110 F 9 F 43 3 C 5 0 C on a temperature fall The secondary high temperature limits open at 300 F 10 F 148 9 C 5 6 C on a temperature rise If the secondary limit opens it will need to be replaced Page 17 5 Circuit Breaker CB1 CB2 208 230 volt only Line voltage connections are made to circuit breakers CB1 CB2 and in the electric heat sections with circuit breakers designated by CB in the model numbers Table 2 shows the amp rating for each circuit breaker used
84. rrangement is detailed in the electric heat section of this manual B Door Interlock Switch S51 460 and 575 volt only All CB28UH CB29M and CB30M 460 575 volt units are equipped with a door interlock switch 551 The switch is rated at 14A at 125VAC and is located on the edge of the control box see figure 2 The switch is wired in se ries with terminal strip TB1 When the blower door 15 re moved the unit will shut down C Terminal Strip TB1 All CB28UH 29 and CB30M 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 ther mostat wires The outdoor unit low voltage wiring connec tions may be spliced with wire nuts inside the CB units D Transformer T1 All CB28UH 29 and series units use a single line voltage to 24VAC transformer mounted in the control box The transformer supplies power to the con trol circuits in the indoor and outdoor unit Transformers in all CB29M 30M 1 units and CB29M 30M 48 2 and 60 2 units are rated at 7 Transfomers in CB28UH and CB29M 30M 21 26 2 30 2 36 2 and 42 2 units are rated at 208 240VAC single phase transformers use two prima ry voltage taps as shown in figure 4 208 240 VOLT TRANSFORMER PRIMARY SECONDARY ORANGE 240 VOLTS RED 208 VOLTS FIGURE 4 YELLOW E Circuit Breaker CB8 amp Fuse F1 All transformers used in the
85. ry drain be connected to a drain line forall units If auxiliary drain is not connected it must be plugged with provided cap For downflow units the auxiliary drain MUST be connected and routed to a drain See figure 24 for auxiliary and main drain locations RIGHT HAND DISCHARGE LEFT HAND DISCHARGE UPFLOW OR DOWNFLOW MAIN DRAIN ON RIGHT AUXILIARY DRAIN ON LEFT FIGURE 24 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 Atrap must be installed in the main drain line 3 The trap must be deep enough to offset the difference in static pressure between drain pan and atmosphere Gen erally two inches is satisfactory for medium static applica tions 4 Horizontal runs must be sloped 1 25mm per 10 feet 8 1m of drain line to offset friction 5 Anopen vent in drain line will sometimes be required due to line length friction and static pressure 6 Drains should be constructed in a manner to facilitate fu ture cleaning and not to interfere with filter access See fig ure 23 Auxiliary drain should run to an area where homeowner will notice it draining Refer to local codes N 1 V START UP OPERATION A Preliminary and Seasonal Checks 1 Make sure the unit is installed in accordance with the installation instructions 2 Inspect electrical wiring bo
86. s shown in figures 6 through 11 All electric heat sections consist of components mounted to the electric heat vestibule panel and electric heating elements ex posed directly to the airstream 208 230V electric heat sec tions may be equipped with circuit breakers The circuit breakers are designated by CB in the model number 460 and 575 volt electric heat sections are equipped with fuses The electric heat section 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 K34 K35 K116 and K117 sequencer relays with a resistive element for a coil andabi metal disk which actuates the contacts The relays are located on the electric heat vestibule panel and are energized by a 24V heating demand W1 W2 and W3 jack plug 2 When energized the internal resist ance heats the bi metal disk causing the contacts to close When the 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 Heat Blower Relay K36 460 amp 575 volt only Contactor K36 is a Three Pole Double Throw N O contactor located on the electric heat vestibule panel The contactor is equipped with a 24VAC coil and is energized by a 24V heating demand W1 W2 and W3 jack plug 2 The contactor energi
87. th field and factory installed for loose connections Tighten as required 3 Check voltage at disconnect switch Voltage must be with in range listed on the nameplate If not consult the power company and have voltage condition corrected be fore starting unit 4 Check to ensure that refrigerant lines are in good condition 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 selection switch to COOL Adjust the thermostat to a set ting far enough below room temperature to bring on the compressor Compressor will start and cycle on demand from the thermostat 2 The refrigerant circuit is charged with R 22 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 Setthe fan switch to AUTO or ON and move the sys tem selection switch to HEAT Adjust the thermostat setting above room temperature 2 The indoor blower immediately starts and the electric heat will stage on based on sequencer timing D Safety or Emergency Shutdown Tum off unit power at circuit breaker E Extended Period Shutdown Turn off t
88. ty for blower motor only Page 32 TABLE 15 ELECTRIC HEAT DATA 3 PHASE CB30M 41 CB30M 46 CB30M 51 amp 65 Blower Coil Model Number CB30M 41 CB30M 46 CB30U 41 46 CB30M 51 CB30U 51 CB30M 65 CB30U 65 Electric Heat kW Model Number amp Shipping Weight ECB29 8 28K42 5 Ibs 2 kg ECB29 10 28K43 6 Ibs 3 kg ECB29 15CB 28K44 9 Ibs 4 kg 28K42 5 Ibs 2 kg ECB29 10 28K43 6 lbs 3 kg ECB29 15CB 28K44 9 Ibs 4 kg 28K42 5 Ibs 2 kg ECB29 10 28K43 6 lbs 3 kg ECB29 15CB 28K44 9 Ibs 4 kg ECB29 20CB 2845 19 Ibs 9 kg 29 25 5 Ibs 2 ECB29 10 28K43 6 Ibs 3 kg ECB29 15CB 28K44 9 Ibs 4 kg ECB29 20CB ECB29 25CB 2846 19 Ibs 9 kg Number of Volts 7 Btuh Steps Input Input 208 230v 3 ph 2 TMinimum Circuit Ampacity 208 60 2050 173 2 2200 67 2290 173 24 290 73 25100 173 __ 25 240 80 27300 173 26 ___ 208 75 2560 173 28 220 84 2870 173 50 230 92 31400 173 251 240 100 34100 173 52 208 113 3840 173 4 220 126 43000 173 44 290 135 4700 173 45 240 150 51200 173 47 L 208 60 2050 24 24 200 67 2290 24 25
89. und the exiting drain pipe liquid and pan inside coil suction lines to prevent infiltration of humid air Page 37 11 Flip access door Knock out the portion of door for the drain pipes and attach to the cabinet with screw pro vided Replace access door on the unit 12 Set unit so it is sloped towards the drain pan 1 4 6mm Connect return and supply air plenums as re quired 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 sup ported Use securing screws no longer than 1 2 13mm to avoid damage to coil or filter See figure 19 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 23 for typical condensate trap configuration TYPICAL CONDENSATE DRAIN CONNECTION MINIMUM 1 INCH 25 mm PITCH PER 10 FEET 3048 mm OF LINE E ME PIPE DIAMETER DIFFERENCE Trap must be deep enough to offset maximum static difference Generally 2 inches 51mm minimum FIGURE 23 It is recommended that the auxilia
90. x D in mm Size of field provided filter in mm Side Return Unit Stand Up Flow Only Ship weight Ibs kg 1 1 8 28 3 8 9 5 2 3 4 19 5 0 0 46 3 8 9 5 3 12 472 11 1 2 x 9 292 x 229 3 4 560 20 x 22 x 1 508 x 559 x 25 208 230 1 6 15 181 83 1 1 8 28 3 8 9 5 2 3 4 19 5 0 0 46 3 8 9 5 3 12 472 11 172 x 9 292 x 229 3 4 560 20 x 22 x 1 508 x 559 x 25 208 230 1 6 15 181 83 7 8 22 2 3 8 9 5 2 3 4 19 4 44 0 41 3 8 9 5 3 12 472 10 x 9 254 x 229 1 2 373 20 x 20 x 1 508 x 508 x 25 208 230 1 160 P 2 5 to 30 kW See Electric Heat Data tables 32X55 32X55 32X55 ACE2020 3 ACE2020 3 ACE2020 3 62N01 62N01 62N01 ACE2020 6 ACE2020 6 ACE2020 6 21 3 8 x 22 543 x 559 21 3 8 x 22 543 x 559 21 3 8 x 22 543 x 559 20 x 20 508 x 508 20 x 20 508 x 508 20 x 20 508 x 508 45 32 6 3 45 32 6 3 45 32 6 3 Single Point Power Source Control Box 2 or 3 circuits Shipping weight Ibs kg Wall Hanging Bracket Kit Up Flow Only Ship wt 1 One disposable frame type filter fumished 2 HACR type breaker or fuse lbs kg 21H39 5 2 45K30 3 1 21H39 5 2 21H39 5 2 45K30 3 1 45K30 3 1 Page 2 External Static Pressure in w g Pa High 1 6 Watts Medium 1 6 Watts BLOWER CB28UH CB28UH 030 BLOWER PERFORMANCE 208 230V cfm CB28
91. y S20 gizes the electric heat relay K32 with 24VAC limit switches are closed electric heat element HE1 is en ergized 2 When K32 1 closes the blower is energized on heat 4 When 2 2 closes assuming the primary 515 ing speed and economizer heat relay K43 is ener and secondary S20 limit switches are closed electric gized see 208 230VAC CB schematic heat element HE2 is energized Page 45 7 CBI BREAKER ELECTRIC HEAT FOR USE WITH HE MEN R CIRCUIT BREAKERS RIC 52 2 RELAY SEQUENCER ELECTRIC HEAT 515 AUTO RESE LINE VOLTAGE FIELD INSTALLED 320 SWT TCH L TMIT SECONDARY lt DENOTES OPTIONAL COMPONENTS NOTE USE COPPER CONDUCTORS ONLY LI A CIRCUIT a gt 2 2 29 5 ECB29 2 5 5KW UNITS UNITS EQUIPMENT A m GROUND CONNECT POWER WIRES FROM UNT LABELED LI AND L2 TO TB2 TERMINAL STRIP ON HEATER PLATE REFER TO UNIT IMUM PROTECTION SIZE EQUIPMENT GROUND IS LOCATED IN INDOOR UNIT LENNIX Suus ne WIRING DIAGRAM HEATING UNITS ELECTRIC ECB29 2 5 5 2 P ECB29 5CB 2 P Supersedes Form No New Form No eee in 535 536 O 1997 Lennox Industries Inc Litho U S A F 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 S15
92. zes the blower as well as the electric heat relay K15 The blower is al ways first on and last off 3 Electric Heat Contactor K15 460 amp 575 volt only Contactor K15 is a Three Pole Double Break 3PDB N O contactor located on the electric heat vestibule panel The contactor is equipped with a 24VAC coil and is energized by a 24V heating demand W1 W2 and W3 jack plug 2 The contactor energizes the heating elements 4 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 airstream 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 re placed when opened The limits are factory set and are not adjustable 208 230 Volt Electric Heat Sections Each stage of the 208 230 electric heat is protected by a primary S15 and secondary S20 high temper ature 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 515 or S20 opens the corre sponding heat element is de energized other heating elements remain energized The primary high temperature limit opens at 150 F 5 F 65 5 C 2 890 on a temperatu

CB28UH, CB29M & CB30M

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CB28UH, CB29M &amp; CB30M

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CB28UH, CB29M & CB30M