Lennox ELITE 10 CB29M Series Installation and operation manual

Page 1
Corp. 9711–L7
CB29M
CB30M
Service Literature
ELITE 10 CB29M and ELITE 12 CB30M SERIES UNITS
INCLUDING ECB29 ELECTRIC HEAT
The 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). Both the
CB29M and CB30M are multi-position (upflow, downflow
or horizontal) units. The units come with a factory
installed check and expansion valve for cooling or heat
pump applications.
CB29M series units are designed to be matched with the
10 SEER air conditioner and heat pump line, and the
CB30M series units are designed to be matched with the
12 and 13 SEER air conditioner and heat pump lines.
While these blower coil units are designed to be primarily
matched with these outdoor units, they may be matched
with other air conditioners or heat pumps as noted in the
rating information.
ECB29 electric heat, in several voltages and kW sizes, can
be field installed in the CB29M and CB30M cabinets.
Information contained in this manual is intended for use
by experienced HVAC service technicians only. All specifi-
cations are subject to change. Procedures outlined in this
manual are presented as a recommendation only and do
not supersede or replace local or state codes.
CB29M CB30M

Page 2
SPECIFICATIONS –CB29M
Model Number CB29M-21/26 CB29M-31 CB29M-41 CB29M-46 CB29M-51 CB29M-65
Net face area — ft.2(m2)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)
Evaporator
Number of rows 2 2 2 3 3 3
Evaporator
Coil Fins per inch (fins per m) 14 (551) 14 (551) 14 (551) 12 (472) 12 (472) 12 (472)
Suct. (vapor) line conn.
– in. (mm) sweat 5/8 (16) 3/4 (19) 3/4 (19) 7/8 (22.2) 7/8 (22.2) 1-1/8 (28)
Liquid line conn. — in. (mm) sweat 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5)
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) 1-5 – 2
(5.3 – 7.0) 2.5 (8.8) 3 (10.6) 3.5 (6.3) 4 (14.1) 5 (17.6)
Refrigerant HCFC-22
Blower wheel nominal diameter x width — in. (mm) 10 x 7
(254 x 178) 10 x 7 (254 x 178) 10 x 8 (254 x 203) 10 x 9 (254 x 229) 11-1/2 x 9 (292 x 229) 11-1/2 x 9 (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)
Number and size of filters
in. (1) 15 x 20 x 1 (1) 20 x 20 x 1
Number
and
size
of
filters
mm (1) 381 x 508 x 25 (1) 508 x 508 x 25
Electrical characteristics (60hz) 208/230v–1ph 208/230v–1 ph
**460v–3 ph 208/230v–1 ph 208/230v – 1ph
**460v – 3 ph
***575v – 3 ph
Shipping weight — lbs. (kg) 1 package 121 (55) 123 (56) 156 (71) 160 (73) 181 (83) 181 (83)
Optional Accessories (Must Be Ordered Extra) 
Side Return Unit Stand
(U Fl O l )
Catalog number 45K31 45K32
(Up-Flow Only) Ship. wt. – lbs. (kg) 5 (2) 6 (3)
Wall Hanging Bracket Kit – Shipping weight – lbs.
(kg) 45K30 – 3 (1) (Up-Flow Only)
Down-Flow Combustible Base – Ship. wt. – lbs. (kg) 34J72 – 8 (4) 34J73 – 8 (4)
ECB29-2 5
*Output – Btuh (kW) 9,500 (2.8) 10,000 (2.9) - - - - - - - - - - - - - - - -
ECB29
-
2
.
5
A.F.U.E. 100% 100% - - - - - - - - - - - - - - - -
ECB29-5,
ECB29 5CB
*Output – Btuh (kW) 18,000 (5.3) 19,000 (5.6) 19,000 (5.5) 20,000 (5.8) 20,000 (5.8) - - - -
ECB29-5CB A.F.U.E. 100% 100% 100% 100% 100% - - - -
ECB29-8,
ECB29 8CB
*Output – Btuh (kW) 28,000 (8.2) 29,000 (8.5) 29,000 (8.5) 30,000 (8.7) 30,000 (8.7) 31,000 (9.1)
ECB29-8CB A.F.U.E. 100% 100% 100% 100% 100% 100%
ECB29-10,
ECB29 10CB
*Output – Btuh (kW) 35,000 (10.3) 36,000 (10.5) 36,000 (10.5) 37,000 (10.8) 37,000 (10.8) 37,500 (10.9)
El t i
ECB29-10CB A.F.U.E. 100% 100% 100% 100% 100% 100%
Electric
Heat
Ci
ECB29-12 5CB
*Output – Btuh (kW) - - - - 44,500 (13.0) 44,500 (13.0) 45,500 (13.3) 45,500 (13.3) 46,000 (13.5)
Capacity
(1 phase)
ECB29
-
12
.
5CB
A.F.U.E. - - - - 100% 100% 100% 100% 100%
(p )
ECB29-15CB
*Output – Btuh (kW) - - - - 53,000 (15.5) 53,000 (15.5) 54,000 (15.8) 54,000 (15.8) 55,000 (16.1)
ECB29
-
15CB
A.F.U.E. - - - - 100% 100% 100% 100% 100%
ECB29-20CB
*Output – Btuh (kW) - - - - - - - - 70,000 (20.5) 71,000 (20.8) 71,000 (20.8) 72,000 (21.1)
ECB29
-
20CB
A.F.U.E. - - - - - - - - 100% 100% 100% 100%
ECB29-25CB
*Output – Btuh (kW) - - - - - - - - - - - - - - - - 88,000 (25.8) 89,000 (26.1)
ECB29
-
25CB
A.F.U.E. - - - - - - - - - - - - - - - - 100% 100%
ECB29-30CB
*Output – Btuh (kW) - - - - - - - - - - - - - - - - - - - - 106,000 (31.0)
ECB29
-
30CB
A.F.U.E. - - - - - - - - - - - - - - - - - - - - 100%
Annual Fuel Utilization Efficiency based on U.S. DOE test procedures and according to FTC labeling regulations.
CB29M-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 & CB29M-65 models only).

Page 3
BLOWER DATA – CB29M
CB29M-21/26 BLOWER PERFORMANCE (208/230v)
External Static Air Volume and Motor Watts at Specific Blower Taps
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 1025 485 375 885 415 305 690 325 240
.05 10 1010 480 370 880 415 305 690 325 240
.10 25 995 470 365 870 410 300 685 325 240
.15 35 975 460 360 855 405 295 680 320 235
.20 50 955 450 350 840 395 290 670 315 230
.25 60 935 440 345 825 390 280 660 310 230
.30 75 910 430 335 805 380 275 645 305 225
.40 100 855 405 320 750 355 255 605 285 210
.50 125 790 375 305 690 325 240 555 260 195
.60 150 720 340 290 615 290 220 495 235 180
.70 175 635 300 270 530 250 205 420 200 165
.75 185 595 280 260 485 230 195 380 180 160
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 Air Volume and Motor Watts at Specific Blower Taps
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 1210 570 445 1105 520 400 980 465 370
.05 10 1200 565 445 1100 520 395 980 460 370
.10 25 1185 560 440 1095 515 390 975 460 365
.15 35 1170 550 430 1080 510 385 965 455 360
.20 50 1150 540 425 1065 500 375 955 450 350
.25 60 1125 530 420 1045 495 370 940 445 340
.30 75 1100 520 410 1020 480 360 920 435 330
.40 100 1035 490 390 960 455 335 870 410 310
.50 125 955 450 370 890 420 315 805 380 285
.60 150 865 410 350 800 380 290 725 345 260
.70 175 760 360 325 695 330 265 635 300 235
.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.
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 High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 1495 705 650 1110 525 510 895 420 415
.05 10 1485 700 640 1120 530 510 910 430 415
.10 25 1475 695 625 1130 530 510 920 435 410
.15 35 1460 690 615 1130 535 510 925 435 400
.20 50 1445 680 600 1130 535 505 930 440 390
.25 60 1425 670 585 1130 535 475 930 440 380
.30 75 1405 660 570 1125 530 465 925 435 370
.40 100 1355 640 540 1100 520 435 905 425 350
.50 125 1295 610 510 1060 500 405 870 410 330
.60 150 1230 580 480 1010 475 380 820 385 310
.70 175 1150 545 450 945 445 350 750 355 290
.75 185 1110 525 435 905 430 335 715 335 280
NOTE — All air data is measured external to unit with air filter in place.
Electric heaters have no appreciable air resistance.

Page 4
BLOWER DATA – CB29M
CB29M-41 BLOWER PERFORMANCE (460v – 1 ph)
External Static Air Volume and Motor Watts at Specific Blower Taps
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 1455 685 665 1120 530 535 925 435 420
.05 10 1445 680 655 1120 530 530 935 440 420
.10 25 1430 675 645 1120 530 520 945 445 415
.15 35 1420 670 635 1115 525 510 950 450 410
.20 50 1400 660 620 1110 525 500 950 450 405
.25 60 1385 655 605 1105 520 485 950 450 385
.30 75 1365 645 590 1095 515 475 945 445 380
.40 100 1325 625 555 1080 510 450 925 435 360
.50 125 1275 600 520 1055 495 425 890 420 345
.60 150 1220 575 475 1025 485 400 845 400 325
.70 175 1160 545 430 990 465 375 785 370 310
.80 200 1090 515 375 950 450 350 715 340 290
NOTE — All air data is measured external to unit with air filter in place.
Electric heaters have no appreciable air resistance.
CB29M-46 BLOWER PERFORMANCE (208/230v)
External Static Air Volume and Motor Watts at Specific Blower Taps
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 1750 825 725 1495 705 580 1250 590 520
.05 10 1740 820 720 1495 705 580 1255 595 520
.10 25 1725 815 710 1490 700 575 1255 590 500
.15 35 1700 805 700 1475 695 565 1250 590 490
.20 50 1675 790 690 1460 690 550 1235 585 475
.25 60 1645 775 680 1435 675 535 1220 575 460
.30 75 1610 760 665 1405 665 520 1200 565 445
.40 100 1525 720 635 1335 630 490 1140 540 415
.50 125 1420 670 605 1245 585 455 1065 505 385
.60 150 1295 610 570 1135 535 420 970 455 355
.70 175 1155 545 535 1000 470 380 850 400 325
.80 200 995 470 495 850 400 345 715 340 295
.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.
CB29M-51 BLOWER PERFORMANCE (208/230v)
External Static Air Volume and Motor Watts at Specific Blower Taps
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 2050 970 1005 1785 845 800 1590 750 660
.05 10 2030 955 990 1770 835 795 1570 740 655
.10 25 2005 945 980 1750 825 785 1550 735 650
.15 35 1975 935 970 1730 815 775 1530 725 645
.20 50 1950 920 955 1710 805 765 1510 715 640
.25 60 1920 905 940 1685 795 755 1490 705 635
.30 75 1890 890 930 1660 785 745 1465 690 630
.40 100 1820 860 900 1605 760 725 1415 670 615
.50 125 1745 825 875 1545 730 705 1365 645 600
.60 150 1665 785 845 1485 700 680 1305 615 580
.70 175 1580 745 820 1415 665 660 1245 585 555
.75 185 1535 725 805 1375 650 650 1210 570 540
NOTE — All air data is measured external to unit with air filter in place.
Electric heaters have no appreciable air resistance.

Page 5
BLOWER DATA – CB29M
CB29M-51 BLOWER PERFORMANCE (460v – 1 ph)
External Static Air Volume and Motor Watts at Specific Blower Taps
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 2135 1010 960 1895 895 800 1695 800 680
.05 10 2110 995 945 1875 885 785 1675 790 675
.10 25 2080 980 935 1855 875 775 1660 785 665
.15 35 2055 970 920 1830 865 765 1640 775 655
.20 50 2025 955 910 1805 850 755 1620 765 645
.25 60 1995 940 895 1780 840 740 1595 755 640
.30 75 1965 930 885 1755 830 730 1575 740 630
.40 100 1905 900 860 1700 800 710 1525 720 610
.50 125 1840 870 835 1640 775 685 1470 695 590
.60 150 1770 835 810 1580 745 665 1415 670 575
.70 175 1700 805 785 1515 715 640 1355 640 555
.80 200 1630 770 760 1445 680 620 1295 610 535
.85 210 1595 750 745 1410 665 605 1260 595 525
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 High Medium–High Medium Medium–Low Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 2245 1060 1080 2130 1005 930 2000 945 820 1800 850 695 1565 740 570
.05 10 2220 1045 1070 2105 995 920 1980 935 815 1780 840 690 1550 730 570
.10 25 2190 1035 1060 2080 985 915 1955 925 805 1760 830 680 1535 725 565
.15 35 2165 1020 1050 2055 970 905 1935 910 795 1735 820 670 1520 715 560
.20 50 2135 1005 1040 2030 960 895 1910 900 785 1715 810 665 1500 710 555
.25 60 2105 995 1030 2000 945 885 1880 890 780 1690 795 655 1480 700 550
.30 75 2070 980 1020 1970 930 875 1855 875 770 1665 785 645 1460 690 540
.40 100 2005 945 995 1910 900 855 1795 850 750 1610 760 630 1415 670 530
.50 125 1935 910 975 1845 870 830 1735 820 730 1555 735 610 1365 645 515
.60 150 1855 875 950 1775 835 810 1665 785 710 1495 705 595 1310 615 500
.70 175 1775 840 925 1695 800 785 1595 755 690 1430 675 580 1245 590 485
.80 200 1690 800 900 1615 765 755 1520 715 665 1365 645 560 1180 555 470
.90 225 1600 755 875 1530 725 730 1440 680 645 1290 610 545 1105 520 455
.95 235 1555 735 865 1490 700 715 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.
CB29M-65 BLOWER PERFORMANCE (460v – 1 ph)
External Static Air Volume and Motor Watts at Specific Blower Taps
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 2230 1055 1145 2050 965 925 1790 845 750
.05 10 2200 1040 1135 2030 955 915 1770 835 740
.10 25 2170 1025 1120 2005 945 910 1745 825 735
.15 35 2140 1010 1110 1980 935 900 1725 815 725
.20 50 2110 995 1095 1960 925 890 1705 805 715
.25 60 2080 980 1085 1930 910 880 1680 795 705
.30 75 2045 965 1075 1905 900 870 1655 780 695
.40 100 1980 935 1050 1845 870 845 1605 755 675
.50 125 1910 900 1025 1785 840 825 1550 730 660
.60 150 1835 865 1000 1715 810 800 1490 705 640
.70 175 1760 830 975 1645 775 775 1425 675 620
.80 200 1680 795 950 1565 740 745 1360 640 600
.90 225 1600 755 925 1485 700 720 1290 610 585
NOTE — All air data is measured external to unit with air filter in place.
Electric heaters have no appreciable air resistance.

Page 6
SPECIFICATIONS – CB30M
Model Number CB30M-21/26 CB30M-31 CB30M-41 CB30M-46 CB30M-51 CB30M-65
Net face area — ft.2(m2)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)
Evaporator
Number of rows 3 3 3 3 3 3
Evaporator
Coil Fins per inch (fins per m) 12 (472) 12 (472) 12 (472) 12 (472) 12 (472) 12 (472)
Suct. (va-
por) line conn. – in. (mm) sweat 5/8 (16) 3/4 (19) 3/4 (19) 7/8 (22.2) 7/8 (22.2) 1-1/8 (28)
Liquid line conn. — in. (mm) sweat 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5)
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) 1-5 – 2
(5.3 – 7.0) 2.5 (8.8) 3 (10.6) 3.5 (6.3) 4 (14.1) 5 (17.6)
Refrigerant HCFC-22
Blower wheel nominal diameter x width — in. (mm) 10 x 7
(254 x 178) 10 x 8 (254 x 203) 11 x 8 (279 x 203) 11 x 8 (279 x 203) 11.5 x 9 (292 x 229) 12 x 9 (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)
Number and size of filters
in. (1) 15 x 20 x 1 (1) 20 x 20 x 1 (1) 20 x 24 x 1
Number
and
size
of
filters
mm (1) 381x508x25 (1) 508 x 508 x 25 (1) 508 x 610 x 25
Electrical characteristics (60hz) 208/230v–1ph 208/230v–1ph
**460v – 3 ph 208/230v–1ph 208/230v – 1 ph
**460v – 3 ph
***575v – 3 ph
Shipping weight — lbs. (kg) 1 package 136 (62) 157 (71) 177 (80) 181 (82) 206 (93) 206 (93)
Optional Accessories (Must Be Ordered Extra) 
Side Return Unit Stand
Catalog number 45K31 45K32
Side
Return
Unit
Stand
(Up-Flow Only) Ship. wt. – lbs.
(kg) 5 (2) 6 (3)
Wall Hanging Bracket Kit – Shipping weight – lbs.
(kg) 45K30 – 3 (1) (Up-Flow Only)
Down-Flow Combustible Base – Ship. wt. – lbs. (kg) 34J72 – 8 (4) 34J73 – 8 (4)
ECB29-2 5
*Output – Btuh (kW) 9,500 (2.8) 10,000 (2.9) - - - - - - - - - - - - - - - -
ECB29
-
2
.
5
A.F.U.E. 100% 100% - - - - - - - - - - - - - - - -
ECB29-5,
ECB29 5CB
*Output – Btuh (kW) 18,000 (5.3) 18,500 (5.4) 18,500 (5.4) 19,000 (5.6) 19,000 (5.6) - - - -
ECB29-5CB A.F.U.E. 100% 100% 100% 100% 100% - - - -
ECB29-8,
ECB29 8CB
*Output – Btuh (kW) 28,000 (8.2) 28,500 (8.4) 28,500 (8.4) 29,000 (8.5) 29,000 (8.5) 30,500 (8.9)
ECB29-8CB A.F.U.E. 100% 100% 100% 100% 100% 100%
ECB29-10,
ECB29 10CB
*Output – Btuh (kW) 35,000 (10.3) 35,500 (10.4) 35,500 (10.4) 36,000 (10.5) 36,000 (10.5) 37,000 (10.8)
El t i
ECB29-10CB A.F.U.E. 100% 100% 100% 100% 100% 100%
Electric
Heat
Ci
ECB29-12 5CB
*Output – Btuh (kW) - - - - 44,000 (12.9) 44,000 (12.9) 44,500 (13.0) 44,500 (13.0) 45,500 (13.3)
Capacity
(1 phase)
ECB29
-
12
.
5CB
A.F.U.E. - - - - 100% 100% 100% 100% 100%
(p )
ECB29-15CB
*Output – Btuh (kW) - - - - 52,500 (15.4) 52,500 (15.4) 53,000 (15.5) 53,000 (15.5) 54,000 (15.8)
ECB29
-
15CB
A.F.U.E. - - - - 100% 100% 100% 100% 100%
ECB29-20CB
*Output – Btuh (kW) - - - - - - - - 69,500 (20.4) 70,000 (20.5) 70,000 (20.5) 71,500 (20.9)
ECB29
-
20CB
A.F.U.E. - - - - - - - - 100% 100% 100% 100%
ECB29-25CB
*Output – Btuh (kW) - - - - - - - - - - - - - - - - 87,000 (25.5) 88,500 (25.9)
ECB29
-
25CB
A.F.U.E. - - - - - - - - - - - - - - - - 100% 100%
ECB29-30CB
*Output – Btuh (kW) - - - - - - - - - - - - - - - - - - - - 105,500 (30.9)
ECB29
-
30CB
A.F.U.E. - - - - - - - - - - - - - - - - - - - - 100%
Annual Fuel Utilization Efficiency based on U.S. DOE test procedures and according to FTC labeling regulations.
CB30M-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 & CB30M-65 models only).

Page 7
BLOWER DATA – CB30M
CB30M-21/26 BLOWER PERFORMANCE (208/230v)
External Static
Air Volume and Motor Watts at Specific Blower Taps
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 1030 485 365 895 425 300 700 330 245
.05 10 1015 480 360 890 420 295 695 330 245
.10 25 1000 470 355 875 415 290 690 325 240
.15 35 980 465 345 860 405 285 680 320 235
.20 50 960 455 340 845 400 280 665 315 230
.25 60 935 440 335 825 390 275 650 310 220
.30 75 910 430 325 800 380 265 635 300 215
.40 100 850 400 310 745 355 250 590 280 205
.50 125 780 370 295 685 320 235 535 255 190
.60 150 705 330 280 605 285 220 470 220 175
.70 175 615 290 265 520 245 200 395 185 165
.75 185 565 265 255 475 225 195 350 165 155
NOTE — All air data is measured external to unit with air filter in place.
Electric heaters have no appreciable air resistance.
CB30M-31 BLOWER PERFORMANCE (208/230v)
External Static Air Volume and Motor Watts at Specific Blower Taps
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 1290 610 385 1175 555 335 1045 490 315
.05 10 1295 610 380 1190 560 330 1075 505 310
.10 25 1290 610 375 1190 560 325 1085 515 300
.15 35 1265 600 370 1175 555 320 1085 510 295
.20 50 1230 580 360 1145 540 310 1065 505 285
.25 60 1180 555 350 1105 520 295 1030 485 270
.30 75 1115 525 335 1045 495 280 980 460 255
.40 100 945 445 305 890 420 250 830 390 220
.50 125 720 340 275 675 320 215 615 290 190
.60 150 440 205 240 405 190 185 335 155 160
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 High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 1525 720 505 1120 530 390 915 430 335
.05 10 1520 720 495 1150 540 385 965 455 330
.10 25 1510 715 480 1170 550 380 1005 475 315
.15 35 1495 705 470 1180 560 285 1035 490 235
.20 50 1475 695 455 1190 560 280 1055 495 230
.25 60 1450 685 440 1185 560 275 1060 500 220
.30 75 1415 670 430 1175 555 375 1050 495 215
.40 100 1335 630 400 1135 535 325 1005 475 290
.50 125 1230 580 375 1060 500 300 915 430 255
.60 150 1100 520 345 960 455 280 775 365 230
.70 175 950 450 320 830 390 255 590 280 205
.75 185 870 410 305 750 355 245 485 230 195
NOTE — All air data is measured external to unit with air filter in place.
Electric heaters have no appreciable air resistance.

Page 8
BLOWER DATA – CB30M
CB30M-41 BLOWER PERFORMANCE (460v)
External Static Air Volume and Motor Watts at Specific Blower Taps
Pressure High Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts
.00 0 1525 720 505 1120 530 390
.05 10 1520 720 495 1150 540 385
.10 25 1510 715 480 1170 550 380
.15 35 1495 705 470 1180 560 285
.20 50 1475 695 455 1190 560 280
.25 60 1450 685 440 1185 560 275
.30 75 1415 670 430 1175 555 375
.40 100 1335 630 400 1135 535 325
.50 125 1230 580 375 1060 500 300
.60 150 1100 520 345 960 455 280
.70 175 950 450 320 830 390 255
.75 185 870 410 305 750 355 245
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
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 1825 860 565 1600 755 455 1325 625 370
.05 10 1790 845 555 1585 750 455 1335 630 370
.10 25 1750 825 540 1565 740 450 1335 630 370
.15 35 1710 805 530 1540 725 440 1330 630 365
.20 50 1660 785 520 1505 710 435 1320 620 360
.25 60 1610 760 505 1470 695 425 1300 615 355
.30 75 1555 735 495 1425 675 415 1270 600 350
.40 100 1430 675 465 1320 625 390 1195 565 330
.50 125 1290 610 440 1195 565 365 1090 515 310
.60 150 1135 535 415 1050 495 335 955 450 285
.70 175 965 455 385 875 415 310 795 375 260
.75 185 875 415 370 780 370 295 700 330 250
NOTE — All air data is measured external to unit with air filter in place.
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 High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 1910 900 590 1785 845 520 1475 695 430
.05 10 1895 895 585 1770 835 515 1480 700 430
.10 25 1870 880 580 1750 825 510 1475 695 425
.15 35 1840 865 570 1720 810 500 1465 690 420
.20 50 1800 850 565 1685 795 490 1445 680 410
.25 60 1755 830 550 1645 775 480 1415 670 405
.30 75 1700 805 540 1600 755 465 1380 650 395
.40 100 1580 745 515 1485 700 440 1290 610 370
.50 125 1425 675 485 1350 635 410 1170 550 345
.60 150 1250 590 450 1190 560 380 1020 480 320
.70 175 1045 495 415 1000 470 350 840 395 295
.75 185 930 440 400 900 425 335 740 350 280
NOTE — All air data is measured external to unit with air filter in place.
Electric heaters have no appreciable air resistance.

Page 9
BLOWER DATA – CB30M
CB30M-51 BLOWER PERFORMANCE (460v – 1 ph)
External Static Air Volume and Motor Watts at Specific Blower Taps
Pressure High Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts
.00 0 1870 885 610 1775 835 530
.05 10 1875 885 610 1775 835 530
.10 25 1870 880 590 1765 835 515
.15 35 1850 875 585 1750 825 510
.20 50 1825 860 575 1720 815 500
.25 60 1790 845 560 1685 795 490
.30 75 1745 825 545 1645 775 480
.40 100 1625 765 505 1530 720 450
.50 125 1465 690 470 1380 650 420
.60 150 1270 600 425 1195 565 385
.70 175 1030 485 385 975 460 350
.80 200 755 355 340 720 340 320
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 Air Volume and Motor Watts at Specific Blower Taps
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 2115 995 780 2025 955 670 1775 835 585
.05 10 2100 990 770 2010 950 665 1775 835 590
.10 25 2085 985 765 1995 940 655 1770 835 580
.15 35 2060 970 750 1975 930 645 1760 830 570
.20 50 2030 960 740 1950 920 635 1745 825 560
.25 60 2000 945 730 1915 905 625 1725 815 550
.30 75 1960 925 715 1880 885 610 1695 800 535
.40 100 1870 880 685 1795 845 580 1630 770 505
.50 125 1755 830 655 1690 795 545 1540 725 475
.60 150 1620 765 625 1560 735 515 1425 675 440
.70 175 1465 690 590 1415 670 480 1295 610 410
.80 200 1290 610 560 1250 590 445 1140 535 375
.85 210 1195 565 545 1160 550 425 1050 495 360
NOTE — All air data is measured external to unit with air filter in place.
Electric 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 High Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts
.00 0 2140 1010 795 1965 930 710
.05 10 2110 995 780 1950 920 700
.10 25 2080 980 765 1930 910 685
.15 35 2045 965 755 1910 900 675
.20 50 2005 945 740 1880 890 660
.25 60 1965 925 725 1850 875 645
.30 75 1920 905 710 1815 855 630
.40 100 1820 860 680 1735 820 600
.50 125 1710 805 650 1635 770 570
.60 150 1585 750 615 1520 720 540
.70 175 1450 685 585 1390 655 505
.80 200 1305 615 550 1245 590 475
.85 210 1225 580 535 1165 550 460
NOTE — All air data is measured external to unit with air filter in place.
Electric heaters have no appreciable air resistance.

Page 10
CB29M & CB30M PARTS ARRANGEMENT
FIGURE 1
CONTROL BOX
ELECTRIC HEAT
SECTION
BLOWER
COMPARTMENT
COIL
HORIZONTAL
DRAIN PAN
EXPANSION
VALVE
BLOWER ACCESS
PANEL
COIL ACCESS
PANEL
FIGURE 2
CB29M and CB30M CONTROL BOX
TRANSFORMER
(T1)
SMALL ELECTRIC HEAT
KNOCK OUT FOR
2.5 – 15 kW
TERMINAL
STRIP (TB1)
TERMINAL
STRIP (TB1)
BRACKET FOR
TERMINAL STRIP
BLOWER
RELAY (K3)
LARGE ELECTRIC HEAT
KNOCK OUT FOR
20 – 30 kW
GROUNDING
LUGS
C
G
W1
W2
W3
R
TRANSFORMER (T26)
(575 VOLT ONLY)
DOOR INTERLOCK
SWITCH (S51)

Page 11
I–APPLICATION
All major blower coil components must be matched
accordingtoLennoxrecommendationsfortheunitto
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.
II–UNIT COMPONENTS
A–Control Box
The CB29M and CB30M control box is shown in figure
2. 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 arrangement is detailed
in the electric heat section of this manual.
B–Door Interlock Switch (S51)
(460 and 575 volt only)
All CB29M and CB30M 460/575 volt units are
equipped with a door interlock switch (S51). 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 series with terminal strip (TB1). When the
blower door is removed the unit will shut down.
C–Terminal Strip (TB1)
All CB29M 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
thermostat wires. The outdoor unit low voltage wiring
connections may be spliced with wire nuts inside the
CB units.
D–Transformer (T1)
All CB29M and CB30M series units use a single line
voltage to 24VAC transformer mounted in the control
box. The transformer supplies power to the control
circuits in the indoor and outdoor unit. Transformers
are rated at 70VA. 208/240VAC single phase transformers
use two primary voltage taps as shown in figure 3.
FIGURE 3
BLUE
YELLOW
ORANGE
RED
BLACK
240 VOLTS
208 VOLTS
PRIMARY SECONDARY
208 / 240 VOLT TRANSFORMER
CB8
E–Circuit Breaker (CB8)
All transformers used in the CB29M and CB30M series
units are equipped with internal secondary voltage
overcurrent 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.
F–Auto Transformer (T26) (575 volt only)
All 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 CB29M and CB30M units use a DPDT relay to ener-
gize 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 12
BLOWER ASSEMBLY
FIGURE 4
BLOWER MOTOR
CAPACITOR (C4) BLOWER MOTOR
(B3)
BLOWER
HOUSING
BLOWER
WHEEL
I–Blower Motor (B3)
All CB29M and CB30M units use single phase direct
drive blower motors with a run capacitor. Figure 4
shows the parts arrangement. All motors use multiple
speed taps. Typically, the high speed tap is energized
during normal operation. The horse power for each
blower motor is listed in table 1.
All units are factory wired for the minimum blower speed
for heat pump and cooling applications with or without
electric heat. No field wiring is required. The wiring dia-
grams show factory set blower speeds. To run the blower
on high speed, refer to the installation instructions. All
speeds shown are minimums. Do not change motor taps
to operate at speeds lower than those shown in the tables.
460 Volt Blower Motor Windings
A third tap (blue) on 460 volt motors is used for internal
wiring during low speed operation and must not be
connected to line voltage. During low speed (yellow
tap) operation, the high speed (black) tap is discon-
nected 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 Service and Applica-
tion Note (Corp. 8909–L7) on 460 volt blower motor
windings.
J–Blower Motor Capacitor (C4)
All CB29M and CB30M series units use single phase direct
drive motors with a run capacitor. The run capacitor is
mounted on the blower housing. See figure 4. Capacitor
ratings are shown in table 1.
TABLE 1
CB29M & CB30M BLOWER RATINGS
UNIT HORSE POWER CAPACITOR
RATING
CB29M-21/26 (P) 1/5 HP 7.5MFD / 370V
CB29M-31 (P) 1/3 HP 5MFD / 370V
CB29M-41 (P) 1/3 HP 5MFD / 370V
CB29M-46 (P/G) 1/2HP 10MFD / 370V
CB29M-51 (P/G) 3/4 HP 10MFD / 370V
CB29M-65 (P/G) 3/4 HP 20MFD / 370V
CB30M-21/26 (P) 1/5 HP 7.5MFD / 370V
CB30M-31 (P) 1/3 HP 15MFD / 370V
CB30M-41 (P) 1/3 HP 15MFD / 370V
CB30M-46 (P) 1/3 HP 20MFD / 370V
CB30M-51 (P/G) 1/3 HP 20MFD / 370V
CB30M-65 (P/G) 1/2 HP 20MFD / 370V
K–Coil
All CB29M and CB30M series units have dual slab coils
arranged in an “A” configuration. Each coil has two or
three rows of copper tubes fitted with ripple–edged
aluminum fins. An expansion distributor feeds multiple
parallel circuits through the coils. The coil is designed to
easily slide out of the unit cabinet.
L–Plastic Drain Pans
Both upflow/downflow and horizontal drain pans are
provided and installed on the CB29M and CB30M units.
The drain pans are made from fiberglass filled plastic.
The drain hole is used for right-hand discharge only,
and must be plugged when the unit is configured for
left-hand discharge.

Page 13
TABLE 2– ELECTRIC HEAT DATA (1 PHASE) – CB29M–21/26 & CB29M–31
Blower Coil
Model Number
Electric Heat kW,
Model Number Number of
Steps
Volts
Input
kW
Input
**Btuh
Input
DBlower
Motor
*Minimum
Circuit Ampacity
Model
Number
& Shipping Weight
Steps
Input
Input
Input
Amps Circuit 1 Circuit 2
b208/230v–1 ph b
208 1.9 6,400 1.5 13 – – – –
25kW
ECB29-2.5
(28K30)
1 step
220 2.1 7,200 1.5 14 – – – –
2
.
5
kW
(28K30)
4 lbs. (2 kg)
1
step
230 2.3 7,800 1.5 14 – – – –
240 2.5 8,500 1.5 15 – – – –
ECB29-5
208 3.8 12,800 1.5 25 – – – –
5kW
ECB29
-
5
(28K31)
ECB29-5CB
1 step
220 4.2 14,300 1.5 26 – – – –
5
kW
ECB29
-
5CB
(28K32)
4 lbs (2 kg)
1
step
230 4.6 15,700 1.5 27 – – – –
CB29M-21/26
4
lbs
.
(2
kg)
240 5.0 17,100 1.5 28 – – – –
CB29M
-
21/26
ECB29-8
208 6.0 20,500 1.5 38 – – – –
8kW
ECB29
-
8
(28K33)
ECB29-8CB
2 steps
220 6.7 22,900 1.5 40 – – – –
8
kW
ECB29
-
8CB
(28K34)
5 lbs (2 kg)
2
steps
230 7.3 25,100 1.5 42 – – – –
5
lbs
.
(2
kg)
240 8.0 27,300 1.5 44 – – – –
ECB29-10
208 7.5 25,600 1.5 47 – – – –
10 kW
ECB29
-
10
(28K35)
ECB29-10CB
2 steps
220 8.4 28,700 1.5 50 – – – –
10
kW
ECB29
-
10CB
(28K36)
5 lbs (2 kg)
2
steps
230 9.2 31,400 1.5 52 – – – –
5
lbs
.
(2
kg)
240 10.0 34,100 1.5 54 – – – –
ECB29-5
208 3.8 12,800 2.4 26 – – – –
5kW
ECB29
-
5
(28K31)
ECB29-5CB
1 step
220 4.2 14,300 2.4 27 – – – –
5
kW
ECB29
-
5CB
(28K32)
4 lbs (2 kg)
1
step
230 4.6 15,700 2.4 28 – – – –
4
lbs
.
(2
kg)
240 5.0 17,100 2.4 29 – – – –
ECB29-8
208 6.0 20,500 2.4 39 – – – –
8kW
ECB29
-
8
(28K33)
ECB29-8CB
2 steps
220 6.7 22,900 2.4 41 – – – –
8
kW
ECB29
-
8CB
(28K34)
5 lbs (2 kg)
2
steps
230 7.3 25,100 2.4 43 – – – –
5
lbs
.
(2
kg)
240 8.0 27,300 2.4 45 – – – –
ECB29-10
208 7.5 25,600 2.4 48 – – – –
CB29M-31
10 kW
ECB29
-
10
(28K35)
ECB29-10CB
2 steps
220 8.4 28,700 2.4 51 – – – –
CB29M
-
31
10
kW
ECB29
-
10CB
(28K36)
5 lbs (2 kg)
2
steps
230 9.2 31,400 2.4 53 – – – –
5
lbs
.
(2
kg)
240 10.0 34,100 2.4 55 – – – –
208 9.4 32,000 2.4 22 38
12 5 kW
ECB29-12.5CB
(28K37)
3 steps
220 10.5 35,800 2.4 23 40
12
.
5
kW
(28K37)
10 lbs. (5 kg)
3
steps
230 11.5 39,200 2.4 24 42
240 12.5 42,600 2.4 25 44
208 11.3 38,400 2.4 26 45
15 kW
ECB29-15CB
(28K38)
3 steps
220 12.6 43,000 2.4 27 48
15
kW
(28K38)
10 lbs. (5 kg)
3
steps
230 13.5 47,000 2.4 28 49
240 15.0 51,200 2.4 29 52
*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).
**Electric heater capacity only — does not include additional blower motor heat capacity.
DMinimum circuit ampacity for blower motor only.

Page 14
TABLE 3– ELECTRIC HEAT DATA (1 PHASE) – CB29M–41 & CB29M–46
Blower Coil
Model Number
Electric Heat kW,
Model Number Number of
Steps
Volts
Input
kW
Input
**Btuh
Input
DBlower
Motor
*Minimum
Circuit Ampacity
Model
Number
& Shipping Weight
Steps
Input
Input
Input
Amps Circuit 1 Circuit 2
b208/230v–1 ph b
ECB29-5 208 3.8 12,800 2.4 26 – – – –
5kW
(28K31)
ECB29-5CB
1 step
220 4.2 14,300 2.4 27 – – – –
5
kW
ECB29
-
5CB
(28K32)
1
step
230 4.6 15,700 2.4 28 – – – –
4 lbs. (2 kg) 240 5.0 17,100 2.4 29 – – – –
ECB29-8 208 6.0 20,500 2.4 39 – – – –
8kW
(28K33)
ECB29-8CB
2 steps
220 6.7 22,900 2.4 41 – – – –
8
kW
ECB29
-
8CB
(28K34)
2
steps
230 7.3 25,100 2.4 43 – – – –
5 lbs. (2 kg) 240 8.0 27,300 2.4 45 – – – –
ECB29-10 208 7.5 25,600 2.4 48 – – – –
10 kW
(28K35)
ECB29-10CB
2 steps
220 8.4 28,700 2.4 51 – – – –
10
kW
ECB29
-
10CB
(28K36)
2
steps
230 9.2 31,400 2.4 53 – – – –
CB29M-41
5 lbs. (2 kg) 240 10.0 34,100 2.4 55 – – – –
CB29M
-
41
208 9.4 32,000 2.4 22 38
12 5 kW
ECB29-12.5CB
(28K37)
3 steps
220 10.5 35,800 2.4 23 40
12
.
5
kW
(28K37)
10 lbs. (5 kg)
3
steps
230 11.5 39,200 2.4 24 42
g
240 12.5 42,600 2.4 25 44
208 11.3 38,400 2.4 26 45
15 kW
ECB29-15CB
(28K38)
3 steps
220 12.6 43,000 2.4 27 48
15
kW
(28K38)
10 lbs. (5 kg)
3
steps
230 13.5 47,000 2.4 28 49
g
240 15.0 51,200 2.4 29 52
208 15.0 51,200 2.4 48 45
20 kW
ECB29-20CB
(28K39)
4 steps
220 16.8 57,300 2.4 51 48
20
kW
(28K39)
14 lbs. (6 kg)
4
steps
230 18.4 62,700 2.4 53 49
240 20.0 68,200 2.4 55 52
ECB29-5 208 3.8 12,800 3.6 27 – – – –
5kW
(28K31)
ECB29-5CB
1 step
220 4.2 14,300 3.6 28 – – – –
5
kW
ECB29
-
5CB
(28K32)
1
step
230 4.6 15,700 3.6 30 – – – –
4 lbs. (2 kg) 240 5.0 17,100 3.6 31 – – – –
ECB29-8 208 6.0 20,500 3.6 41 – – – –
8kW
(28K33)
ECB29-8CB
2 steps
220 6.7 22,900 3.6 43 – – – –
8
kW
ECB29
-
8CB
(28K34)
2
steps
230 7.3 25,100 3.6 44 – – – –
5 lbs. (2 kg) 240 8.0 27,300 3.6 46 – – – –
ECB29-10 208 7.5 25,600 3.6 50 – – – –
10 kW
(28K35)
ECB29-10CB
2 steps
220 8.4 28,700 3.6 52 – – – –
10
kW
ECB29
-
10CB
(28K36)
2
steps
230 9.2 31,400 3.6 55 – – – –
CB29M-46
5 lbs. (2 kg) 240 10.0 34,100 3.6 57 – – – –
CB29M
-
46
208 9.4 32,000 3.6 23 38
12 5 kW
ECB29-12.5CB
(28K38)
3 steps
220 10.5 35,800 3.6 24 40
12
.
5
kW
(28K38)
10 lbs. (5 kg)
3
steps
230 11.5 39,200 3.6 25 42
g
240 12.5 42,600 3.6 26 44
208 11.3 38,400 3.6 27 45
15 kW
ECB29-15CB
(28K38)
3 steps
220 12.6 43,000 3.6 28 48
15
kW
(28K38)
10 lbs. (5 kg)
3
steps
230 13.5 47,000 3.6 29 49
g
240 15.0 51,200 3.6 31 52
208 15.0 51,200 3.6 50 45
20 kW
ECB29-20CB
(28K39)
4 steps
220 16.8 57,300 3.6 52 48
20
kW
(28K39)
14 lbs. (6 kg)
4
steps
230 18.4 62,700 3.6 55 49
240 20.0 68,200 3.6 57 52
*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). **Electric heater capacity only — does not include additional blower motor heat capacity.DMinimum circuit ampacity for blower motor only.

Page 15
TABLE 4– ELECTRIC HEAT DATA (1 PHASE) – CB29M–51 & CB29M–65
Blower Coil
Model
Electric Heat kW,
Model Number
Number of
St
Volts
It
kW
It
**Btuh
It
DBlower
Motor
*Minimum Circuit Ampacity
Model
Number
Model
Number
& Shipping Weight
S
teps
I
nput
I
nput
I
nput
Motor
Amps Circuit 1 Circuit 2 Circuit 3
b208/230v–1 ph b
ECB29-5
(28K31)
208 3.8 12,800 3.8 28 – – – – – – – –
5kW
(28K31)
ECB29-5CB
1 step
220 4.2 14,300 3.8 29 – – – – – – – –
5
kW
ECB29
-
5CB
(28K32)
(k)
1
step
230 4.6 15,700 3.8 30 – – – – – – – –
()
4 lbs. (2 kg) 240 5.0 17,100 3.8 31 – – – – – – – –
ECB29-8
(28K33)
208 6.0 20,500 3.8 41 – – – – – – – –
8kW
(28K33)
ECB29-8CB
2 steps
220 6.7 22,900 3.8 43 – – – – – – – –
8
kW
ECB29
-
8CB
(28K34)
(k)
2
steps
230 7.3 25,100 3.8 44 – – – – – – – –
()
4 lbs. (2 kg) 240 8.0 27,300 3.8 47 – – – – – – – –
ECB29-10
(28K35)
208 7.5 25,600 3.8 50 – – – – – – – –
10 kW
(28K35)
ECB29-10CB
2 steps
220 8.4 28,700 3.8 53 – – – – – – – –
10
kW
ECB29
-
10CB
(28K36)
(k)
2
steps
230 9.2 31,400 3.8 55 – – – – – – – –
()
5 lbs. (2 kg) 240 10.0 34,100 3.8 57 – – – – – – – –
208 9.4 32,000 3.8 24 38 – – – –
CB29M-51
12 5 kW
ECB29-12.5CB
(28K37)
3 steps
220 10.5 35,800 3.8 25 40 – – – –
CB29M
-
51
12
.
5
kW
(28K37)
10 lbs.
(
5 k
g)
3
steps
230 11.5 39,200 3.8 26 42 – – – –
10
lbs.
(5
kg)
240 12.5 42,600 3.8 27 44 – – – –
208 11.3 38,400 3.8 28 45 – – – –
15 kW
ECB29-15CB
(28K38)
3 steps
220 12.6 43,000 3.8 29 48 – – – –
15
kW
(28K38)
10 lbs.
(
5 k
g)
3
steps
230 13.5 47,000 3.8 30 49 – – – –
10
lbs.
(5
kg)
240 15.0 51,200 3.8 31 52 – – – –
208 15.0 51,200 3.8 50 45 – – – –
20 kW
ECB29-20CB
(28K39)
4 steps
220 16.8 57,300 3.8 53 48 – – – –
20
kW
(28K39)
14 lbs.
(
6 k
g)
4
steps
230 18.4 62,700 3.8 55 49 – – – –
14
lbs.
(6
kg)
240 20.0 68,200 3.8 57 52 – – – –
208 18.8 64,100 3.8 42 38 38
25 kW
ECB29-25CB
(28K40)
6 steps
220 21.0 71,700 3.8 45 40 40
25
kW
(28K40)
18 lbs.
(
8 k
g)
6
steps
230 23.0 78,300 3.8 46 42 42
18
lbs.
(8
kg)
240 25.0 85,300 3.8 48 44 44
ECB29-5
(28K31)
208 3.8 12,800 4.6 29 – – – – – – – –
5kW
(28K31)
ECB29-5CB
1 step
220 4.2 14,300 4.6 30 – – – – – – – –
5
kW
ECB29
-
5CB
(28K32)
(k)
1
step
230 4.6 15,700 4.6 31 – – – – – – – –
()
4 lbs. (2 kg) 240 5.0 17,100 4.6 32 – – – – – – – –
ECB29-8
(28K33)
208 6.0 20,500 4.6 42 – – – – – – – –
8kW
(28K33)
ECB29-8CB
2 steps
220 6.7 22,900 4.6 44 – – – – – – – –
8
kW
ECB29
-
8CB
(28K34)
(k)
2
steps
230 7.3 25,100 4.6 45 – – – – – – – –
()
4 lbs. (2 kg) 240 8.0 27,300 4.6 48 – – – – – – – –
ECB29-10
(28K35)
208 7.5 25,600 4.6 51 – – – – – – – –
10 kW
(28K35)
ECB29-10CB
2 steps
220 8.4 28,700 4.6 54 – – – – – – – –
10
kW
ECB29
-
10CB
(28K36)
(k)
2
steps
230 9.2 31,400 4.6 56 – – – – – – – –
()
5 lbs. (2 kg) 240 10.0 34,100 4.6 58 – – – – – – – –
208 9.4 32,000 4.6 25 38 – – – –
12 5 kW
ECB29-12.5CB
(28K37)
3 steps
220 10.5 35,800 4.6 26 40 – – – –
12
.
5
kW
(28K37)
10 lbs.
(
5 k
g)
3
steps
230 11.5 39,200 4.6 27 42 – – – –
CB29M-65
10
lbs.
(5
kg)
240 12.5 42,600 4.6 28 44 – – – –
CB29M
-
65
208 11.3 38,400 4.6 28 45 – – – –
15 kW
ECB29-15CB
(28K38)
3 steps
220 12.6 43,000 4.6 30 48 – – – –
15
kW
(28K38)
10 lbs.
(
5 k
g)
3
steps
230 13.5 47,000 4.6 30 49 – – – –
10
lbs.
(5
kg)
240 15.0 51,200 4.6 32 52 – – – –
208 15.0 51,200 4.6 51 45 – – – –
20 kW
ECB29-20CB
(28K39)
4 steps
220 16.8 57,300 4.6 54 48 – – – –
20
kW
(28K39)
14 lbs.
(
6 k
g)
4
steps
230 18.4 62,700 4.6 56 49 – – – –
14
lbs.
(6
kg)
240 20.0 68,200 4.6 58 52 – – – –
208 18.8 64,100 4.6 43 38 38
25 kW
ECB29-25CB
(28K40)
6 steps
220 21.0 71,700 4.6 46 40 40
25
kW
(28K40)
18 lbs.
(
8 k
g)
6
steps
230 23.0 78,300 4.6 47 42 42
18
lbs.
(8
kg)
240 25.0 85,300 4.6 50 44 44
208 22.5 76,900 4.6 51 45 45
30 kW
ECB29-30CB
(28K41)
6 steps
220 25.2 86,000 4.6 54 48 48
30
kW
(28K41)
19 lbs.
(
9 k
g)
6
steps
230 27.5 94,000 4.6 56 49 49
19
lbs.
(9
kg)
240 30.0 102,400 4.6 58 52 52
*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).
**Electric heater capacity only — does not include additional blower motor heat capacity.
DMinimum circuit ampacity for blower motor only.

Page 16
TABLE 5– ELECTRIC HEAT DATA (3 PHASE) – CB29M–41 & CB29M–46, CB29M–51 & CB29M–65
Blower Coil
Model
Electric Heat kW,
Model Number
Number of
St
Volts
It
kW
It
**Btuh
It
DBlower
Motor
*Minimum Circuit Ampacity
Model
Number
Model
Number
& Shipping Weight Steps Input Input Input
Motor
Amps Circuit 1 Circuit 2
b208/230v–3 ph b
ECB29 8
208 6.0 20,500 2.4 24 – – – –
8kW
ECB29-8
(28K42)
3 steps
220 6.7 22,900 2.4 25 – – – –
8
kW
(28K42)
5 lbs. (2 kg)
3
steps 230 7.3 25,100 2.4 26 – – – –
5
lbs
.
(2
kg)
240 8.0 27,300 2.4 27 – – – –
ECB29 10
208 7.5 25,600 2.4 29 – – – –
CB29M-41
10 kW
ECB29-10
(28K43)
3 steps
220 8.4 28,700 2.4 31 – – – –
CB29M
-
41
10
kW
(28K43)
6 lbs. (3 kg)
3
steps 230 9.2 31,400 2.4 32 – – – –
6
lbs
.
(3
kg)
240 10.0 34,100 2.4 33 – – – –
ECB29 15CB
208 11.3 38,400 2.4 42 – – – –
15 kW
ECB29-15CB
(28K44)
3 steps
220 12.6 43,000 2.4 44 – – – –
15
kW
(28K44)
9 lbs. (4 kg)
3
steps 230 13.5 47,000 2.4 45 – – – –
9
lbs
.
(4
kg)
240 15.0 51,200 2.4 48 – – – –
ECB29 8
208 6.0 20,500 3.6 25 – – – –
8kW
ECB29-8
(28K42)
3 steps
220 6.7 22,900 3.6 27 – – – –
8
kW
(28K42)
5 lbs. (2 kg)
3
steps 230 7.3 25,100 3.6 27 – – – –
5
lbs
.
(2
kg)
240 8.0 27,300 3.6 29 – – – –
ECB29 10
208 7.5 25,600 3.6 31 – – – –
CB29M-46
10 kW
ECB29-10
(28K43)
3 steps
220 8.4 28,700 3.6 32 – – – –
CB29M
-
46
10
kW
(28K43)
6 lbs. (3 kg)
3
steps 230 9.2 31,400 3.6 33 – – – –
6
lbs
.
(3
kg)
240 10.0 34,100 3.6 35 – – – –
ECB29 15CB
208 11.3 38,400 3.6 44 – – – –
15 kW
ECB29-15CB
(28K44)
3 steps
220 12.6 43,000 3.6 46 – – – –
15
kW
(28K44)
9 lbs. (4 kg)
3
steps 230 13.5 47,000 3.6 47 – – – –
9
lbs
.
(4
kg)
240 15.0 51,200 3.6 50 – – – –
ECB29 8
208 6.0 20,500 3.8 26 – – – –
8kW
ECB29-8
(28K42)
3 steps
220 6.7 22,900 3.8 27 – – – –
8
kW
(28K42)
5 lbs. (2 kg)
3
steps 230 7.3 25,100 3.8 28 – – – –
5
lbs
.
(2
kg)
240 8.0 27,300 3.8 29 – – – –
ECB29 10
208 7.5 25,600 3.8 31 – – – –
10 kW
ECB29-10
(28K43)
3 steps
220 8.4 28,700 3.8 32 – – – –
10
kW
(28K43)
6 lbs. (3 kg)
3
steps 230 9.2 31,400 3.8 34 – – – –
6
lbs
.
(3
kg)
240 10.0 34,100 3.8 35 – – – –
ECB29 15CB
208 11.3 38,400 3.8 44 – – – –
CB29M-51
15 kW
ECB29-15CB
(28K44)
3 steps
220 12.6 43,000 3.8 46 – – – –
CB29M
-
51
15
kW
(28K44)
9 lbs. (4 kg)
3
steps 230 13.5 47,000 3.8 47 – – – –
9
lbs
.
(4
kg)
240 15.0 51,200 3.8 50 – – – –
ECB29 20CB
208 15.0 51,200 3.8 31 26
20 kW
ECB29-20CB
(28K45)
6 steps
220 16.8 57,300 3.8 32 28
20
kW
(28K45)
19 lbs. (9 kg)
6
steps 230 18.4 62,700 3.8 34 29
19
lbs
.
(9
kg)
240 20.0 68,200 3.8 35 30
ECB29 25CB
208 18.8 64,100 3.8 37 33
25 kW
ECB29-25CB
(28K46)
6 steps
220 21.0 71,700 3.8 39 34
25
kW
(28K46)
19 lbs. (9 kg)
6
steps 230 23.0 78,300 3.8 41 36
19
lbs
.
(9
kg)
240 25.0 85,300 3.8 43 38
ECB29 8
208 6.0 20,500 4.6 27 – – – –
8kW
ECB29-8
(28K42)
3 steps
220 6.7 22,900 4.6 28 – – – –
8
kW
(28K42)
5 lbs. (2 kg)
3
steps 230 7.3 25,100 4.6 29 – – – –
5
lbs
.
(2
kg)
240 8.0 27,300 4.6 30 – – – –
ECB29 10
208 7.5 25,600 4.6 32 – – – –
10 kW
ECB29-10
(28K43)
3 steps
220 8.4 28,700 4.6 33 – – – –
10
kW
(28K43)
6 lbs. (3 kg)
3
steps 230 9.2 31,400 4.6 35 – – – –
6
lbs
.
(3
kg)
240 10.0 34,100 4.6 36 – – – –
ECB29 15CB
208 11.3 38,400 4.6 45 – – – –
CB29M-65
15 kW
ECB29-15CB
(28K44)
3 steps
220 12.6 43,000 4.6 47 – – – –
CB29M
-
65
15
kW
(28K44)
9 lbs. (4 kg)
3
steps 230 13.5 47,000 4.6 48 – – – –
9
lbs
.
(4
kg)
240 15.0 51,200 4.6 51 – – – –
ECB29 20CB
208 15.0 51,200 4.6 32 26
20 kW
ECB29-20CB
(28K45)
6 steps
220 16.8 57,300 4.6 33 28
20
kW
(28K45)
19 lbs. (9 kg)
6
steps 230 18.4 62,700 4.6 35 29
19
lbs
.
(9
kg)
240 20.0 68,200 4.6 36 30
ECB29 25CB
208 18.8 64,100 4.6 38 33
25 kW
ECB29-25CB
(28K46)
6 steps
220 21.0 71,700 4.6 40 34
25
kW
(28K46)
19 lbs. (9 kg)
6
steps 230 23.0 78,300 4.6 42 36
19
lbs
.
(9
kg)
240 25.0 85,300 4.6 44 38
*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).
**Electric heater capacity only — does not include additional blower motor heat capacity.
DMinimum circuit ampacity for blower motor only.

Page 17
TABLE 6– ELECTRIC HEAT DATA (3 PHASE) – CB29M–41, CB29M–51 CB29M–65
Blower Coil
Model
Electric Heat kW,
Model Number
Number of Volts kW **Btuh DBlower
Motor
*Minimum Circuit
Model
Number
Model
Number
& Shipping Weight Steps Input Input Input
Motor
Amps Ampacity
b460v–3 ph b
ECB29 10
440 8.4 28,700 1.3 15
10 kW
ECB29
-
10
(28K47)
12 lbs (5 kg)
3 steps 460 9.2 31,400 1.3 16
CB29M 41
12
lb
s.
(5
k
g
)
480 10.0 34,100 1.3 17
CB29M
-
41
ECB29 15
440 12.6 43,000 1.3 22
15 kW
ECB29
-
15
(28K48)
12 lbs (5 kg)
3 steps 460 13.8 47,000 1.3 23
12
lb
s.
(5
k
g
)
480 15.0 51,200 1.3 24
ECB29 10
440 8.4 28,700 1.9 16
10 kW
ECB29
-
10
(28K47)
12 lbs (5 kg)
3 steps 460 9.2 31,400 1.9 17
12
lb
s.
(5
k
g
)
480 10.0 34,100 1.9 17
ECB29 15
440 12.6 43,000 1.9 23
15 kW
ECB29
-
15
(28K48)
12 lbs (5 kg)
3 steps 460 13.8 47,000 1.9 24
CB29M 51
12
lb
s.
(5
k
g
)
480 15.0 51,200 1.9 25
CB29M
-
51
ECB29 20
440 16.8 57,300 1.9 30
20 kW
ECB29
-
20
(28K49)
18 lbs (8 kg)
3 steps 460 18.4 62,700 1.9 31
18
lb
s.
(8
k
g
)
480 20.0 68,200 1.9 32
ECB29 25
440 21.0 71,700 1.9 37
25 kW
ECB29
-
25
(28K50)
18 lbs (8 kg)
3 steps 460 23.0 78,300 1.9 39
18
lb
s.
(8
k
g
)
480 25.0 85,300 1.9 40
ECB29 10
440 8.4 28,700 2.3 17
10 kW
ECB29
-
10
(28K47)
12 lbs (5 kg)
3 steps 460 9.2 31,400 2.3 17
12
lb
s.
(5
k
g
)
480 10.0 34,100 2.3 18
ECB29 15
440 12.6 43,000 2.3 24
15 kW
ECB29
-
15
(28K48)
12 lbs (5 kg)
3 steps 460 13.8 47,000 2.3 25
CB29M 65
12
lb
s.
(5
k
g
)
480 15.0 51,200 2.3 25
CB29M
-
65
ECB29 20
440 16.8 57,300 2.3 30
20 kW
ECB29
-
20
(28K49)
18 lbs (8 kg)
3 steps 460 18.4 62,700 2.3 32
18
lb
s.
(8
k
g
)
480 20.0 68,200 2.3 33
ECB29 25
440 21.0 71,700 2.3 37
25 kW
ECB29
-
25
(28K50)
18 lbs (8 kg)
3 steps 460 23.0 78,300 2.3 39
18
lb
s.
(8
k
g
)
480 25.0 85,300 2.3 40
b{575v–3 ph b
ECB29 20
550 16.8 57,300 {{1.9 24
20 kW
ECB29
-
20
(28K51)
18 lbs (8 kg)
3 steps 575 18.4 62,700 {{1.9 26
{CB29M 51
18
lb
s.
(8
k
g
)
600 20.0 68,200 {{1.9 26
{CB29M
-
51
ECB29 25
550 21.0 71,700 {{1.9 30
25 kW
ECB29
-
25
(28K52)
18 lbs (8 kg)
3 steps 575 23.0 78,300 {{1.9 31
18
lb
s.
(8
k
g
)
600 25.0 85,300 {{1.9 32
ECB29 20
550 16.8 57,300 {{2.3 25
20 kW
ECB29
-
20
(28K51)
18 lbs (8 kg)
3 steps 575 18.4 62,700 {{2.3 26
{CB29M 65
18
lb
s.
(8
k
g
)
600 20.0 68,200 {{2.3 27
{CB29M
-
65
ECB29 25
550 21.0 71,700 {{2.3 30
25 kW
ECB29
-
25
(28K52)
18 lbs (8 kg)
3 steps 575 23.0 78,300 {{2.3 32
18
lb
s.
(8
k
g
)
600 25.0 85,300 {{2.3 33
*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).
**Electric heater capacity only — does not include additional blower motor heat capacity.
DMinimum circuit ampacity for blower motor only.
{NOTE – ALL 575v ELECTRIC HEATERS ARE USED WITH CB29M-51 & CB29M-65 460v MODEL BLOWER COIL UNITS – A STEP-DOWN TRANSFORMER
FOR THE BLOWER COIL UNIT IS FURNISHED WITH ALL 575v ELECTRIC HEATERS.
{{Blower motor is rated at 460v.

Page 18
TABLE 7– ELECTRIC HEAT DATA (1 PHASE) – CB30M–21/26 & CB30M–31
Blower Coil
Model Number
Electric Heat kW,
Model Number Number of
Steps
Volts
Input
kW
Input
Btuh
Input
Blower
Motor
{Minimum
Circuit Ampacity
Model
Number
& Shipping Weight
Steps
Input
Input
Input
Amps Circuit 1 Circuit 2
b208/230v–1 ph b
208 1.9 6,400 1.5 13 – – – –
25kW
ECB29-2.5
(28K30)
1 step
220 2.1 7,200 1.5 14 – – – –
2
.
5
kW
(28K30)
4 lbs. (2 kg)
1
step
230 2.3 7,800 1.5 14 – – – –
240 2.5 8,500 1.5 15 – – – –
ECB29-5
208 3.8 12,800 1.5 25 – – – –
5kW
ECB29
-
5
(28K31)
ECB29-5CB
1 step
220 4.2 14,300 1.5 26 – – – –
5
kW
ECB29
-
5CB
(28K32)
4 lbs (2 kg)
1
step
230 4.6 15,700 1.5 27 – – – –
CB30M-21/26
4
lbs
.
(2
kg)
240 5.0 17,100 1.5 28 – – – –
CB30U-21/26
ECB29-8
208 6.0 20,500 1.5 38 – – – –
8kW
ECB29
-
8
(28K33)
ECB29-8CB
2 steps
220 6.7 22,900 1.5 40 – – – –
8
kW
ECB29
-
8CB
(28K34)
5 lbs (2 kg)
2
steps
230 7.3 25,100 1.5 42 – – – –
5
lbs
.
(2
kg)
240 8.0 27,300 1.5 44 – – – –
ECB29-10
208 7.5 25,600 1.5 47 – – – –
10 kW
ECB29
-
10
(28K35)
ECB29-10CB
2 steps
220 8.4 28,700 1.5 50 – – – –
10
kW
ECB29
-
10CB
(28K36)
5 lbs (2 kg)
2
steps
230 9.2 31,400 1.5 52 – – – –
5
lbs
.
(2
kg)
240 10.0 34,100 1.5 54 – – – –
ECB29-5
208 3.8 12,800 1.73 25 – – – –
5kW
ECB29
-
5
(28K31)
ECB29-5CB
1 step
220 4.2 14,300 1.73 26 – – – –
5
kW
ECB29
-
5CB
(28K32)
4 lbs (2 kg)
1
step
230 4.6 15,700 1.73 27 – – – –
4
lbs
.
(2
kg)
240 5.0 17,100 1.73 28 – – – –
ECB29-8
208 6.0 20,500 1.73 38 – – – –
8kW
ECB29
-
8
(28K33)
ECB29-8CB
2 steps
220 6.7 22,900 1.73 40 – – – –
8
kW
ECB29
-
8CB
(28K34)
5 lbs (2 kg)
2
steps
230 7.3 25,100 1.73 42 – – – –
5
lbs
.
(2
kg)
240 8.0 27,300 1.73 44 – – – –
ECB29-10
208 7.5 25,600 1.73 47 – – – –
CB30M-31
10 kW
ECB29
-
10
(28K35)
ECB29-10CB
2 steps
220 8.4 28,700 1.73 50 – – – –
CB30U-31
10
kW
ECB29
-
10CB
(28K36)
5 lbs (2 kg)
2
steps
230 9.2 31,400 1.73 52 – – – –
5
lbs
.
(2
kg)
240 10.0 34,100 1.73 54 – – – –
208 9.4 32,000 1.73 21 38
12 5 kW
ECB29-12.5CB
(28K37)
3 steps
220 10.5 35,800 1.73 22 40
12
.
5
kW
(28K37)
10 lbs. (5 kg)
3
steps
230 11.5 39,200 1.73 23 42
240 12.5 42,600 1.73 24 43
208 11.3 38,400 1.73 25 45
15 kW
ECB29-15CB
(28K38)
3 steps
220 12.6 43,000 1.73 26 48
15
kW
(28K38)
10 lbs. (5 kg)
3
steps
230 13.5 47,000 1.73 27 52
240 15.0 51,200 1.73 28 52
{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).
Electric heater capacity only — does not include additional blower motor heat capacity.
Minimum circuit ampacity for blower motor only.

Page 19
TABLE 8– ELECTRIC HEAT DATA (1 PHASE) – CB30M–41 & CB30M–46
Blower Coil
Model Number
Electric Heat kW,
Model Number Number of
Steps
Volts
Input
kW
Input
Btuh
Input
Blower
Motor
{Minimum
Circuit Ampacity
Model
Number
& Shipping Weight
Steps
Input
Input
Input
Amps Circuit 1 Circuit 2
b208/230v–1 ph b
ECB29-5 208 3.8 12,800 1.73 25 – – – –
5kW
(28K31)
ECB29-5CB
1 step
220 4.2 14,300 1.73 26 – – – –
5
kW
ECB29
-
5CB
(28K32)
1
step
230 4.6 15,700 1.73 27 – – – –
4 lbs. (2 kg) 240 5.0 17,100 1.73 28 – – – –
ECB29-8 208 6.0 20,500 1.73 38 – – – –
8kW
(28K33)
ECB29-8CB
2 steps
220 6.7 22,900 1.73 40 – – – –
8
kW
ECB29
-
8CB
(28K34)
2
steps
230 7.3 25,100 1.73 42 – – – –
5 lbs. (2 kg) 240 8.0 27,300 1.73 44 – – – –
ECB29-10 208 7.5 25,600 1.73 47 – – – –
10 kW
(28K35)
ECB29-10CB
2 steps
220 8.4 28,700 1.73 50 – – – –
10
kW
ECB29
-
10CB
(28K36)
2
steps
230 9.2 31,400 1.73 52 – – – –
CB30M-41
5 lbs. (2 kg) 240 10.0 34,100 1.73 54 – – – –
CB30M
-
41
208 9.4 32,000 1.73 21 38
12 5 kW
ECB29-12.5CB
(28K37)
3 steps
220 10.5 35,800 1.73 22 40
12
.
5
kW
(28K37)
10 lbs. (5 kg)
3
steps
230 11.5 39,200 1.73 23 42
g
240 12.5 42,600 1.73 24 43
208 11.3 38,400 1.73 25 45
15 kW
ECB29-15CB
(28K38)
3 steps
220 12.6 43,000 1.73 26 48
15
kW
(28K38)
10 lbs. (5 kg)
3
steps
230 13.5 47,000 1.73 27 50
g
240 15.0 51,200 1.73 28 52
208 15.0 51,200 1.73 47 45
20 kW
ECB29-20CB
(28K39)
4 steps
220 16.8 57,300 1.73 50 48
20
kW
(28K39)
14 lbs. (6 kg)
4
steps
230 18.4 62,700 1.73 52 50
240 20.0 68,200 1.73 54 52
ECB29-5 208 3.8 12,800 2.4 26 – – – –
5kW
(28K31)
ECB29-5CB
1 step
220 4.2 14,300 2.4 27 – – – –
5
kW
ECB29
-
5CB
(28K32)
1
step
230 4.6 15,700 2.4 28 – – – –
4 lbs. (2 kg) 240 5.0 17,100 2.4 29 – – – –
ECB29-8 208 6.0 20,500 2.4 39 – – – –
8kW
(28K33)
ECB29-8CB
2 steps
220 6.7 22,900 2.4 41 – – – –
8
kW
ECB29
-
8CB
(28K34)
2
steps
230 7.3 25,100 2.4 43 – – – –
5 lbs. (2 kg) 240 8.0 27,300 2.4 45 – – – –
ECB29-10 208 7.5 25,600 2.4 48 – – – –
10 kW
(28K35)
ECB29-10CB
2 steps
220 8.4 28,700 2.4 51 – – – –
10
kW
ECB29
-
10CB
(28K36)
2
steps
230 9.2 31,400 2.4 53 – – – –
CB30M-46 5 lbs. (2 kg) 240 10.0 34,100 2.4 55 – – – –
CB30U-41/46 208 9.4 32,000 2.4 22 38
12 5 kW
ECB29-12.5CB
(28K38)
3 steps
220 10.5 35,800 2.4 23 40
12
.
5
kW
(28K38)
10 lbs. (5 kg)
3
steps
230 11.5 39,200 2.4 24 42
g
240 12.5 42,600 2.4 25 43
208 11.3 38,400 2.4 26 45
15 kW
ECB29-15CB
(28K38)
3 steps
220 12.6 43,000 2.4 27 48
15
kW
(28K38)
10 lbs. (5 kg)
3
steps
230 13.5 47,000 2.4 28 50
g
240 15.0 51,200 2.4 29 52
208 15.0 51,200 2.4 48 45
20 kW
ECB29-20CB
(28K39)
4 steps
220 16.8 57,300 2.4 51 48
20
kW
(28K39)
14 lbs. (6 kg)
4
steps
230 18.4 62,700 2.4 53 50
240 20.0 68,200 2.4 55 52
{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).
Electric heater capacity only — does not include additional blower motor heat capacity.Minimum circuit ampacity for blower motor only.

Page 20
TABLE 9– ELECTRIC HEAT DATA (1 PHASE) – CB30M–51 & CB30M–65
Blower Coil
Model
Electric Heat kW,
Model Number
Number of
St
Volts
It
kW
It
Btuh
It
Blower
Motor
{Minimum Circuit Ampacity
Model
Number
Model
Number
& Shipping Weight
S
teps
I
nput
I
nput
I
nput
Motor
Amps Circuit 1 Circuit 2 Circuit 3
b208/230v–1 ph b
ECB29-5
(28K31)
208 3.8 12,800 2.4 26 – – – – – – – –
5kW
(28K31)
ECB29-5CB
1 step
220 4.2 14,300 2.4 27 – – – – – – – –
5
kW
ECB29
-
5CB
(28K32)
(k)
1
step
230 4.6 15,700 2.4 28 – – – – – – – –
()
4 lbs. (2 kg) 240 5.0 17,100 2.4 29 – – – – – – – –
ECB29-8
(28K33)
208 6.0 20,500 2.4 39 – – – – – – – –
8kW
(28K33)
ECB29-8CB
2 steps
220 6.7 22,900 2.4 41 – – – – – – – –
8
kW
ECB29
-
8CB
(28K34)
(k)
2
steps
230 7.3 25,100 2.4 43 – – – – – – – –
()
4 lbs. (2 kg) 240 8.0 27,300 2.4 45 – – – – – – – –
ECB29-10
(28K35)
208 7.5 25,600 2.4 48 – – – – – – – –
10 kW
(28K35)
ECB29-10CB
2 steps
220 8.4 28,700 2.4 51 – – – – – – – –
10
kW
ECB29
-
10CB
(28K36)
(k)
2
steps
230 9.2 31,400 2.4 53 – – – – – – – –
()
5 lbs. (2 kg) 240 10.0 34,100 2.4 55 – – – – – – – –
208 9.4 32,000 2.4 22 38 – – – –
CB30M-51
CB30U 51
12 5 kW
ECB29-12.5CB
(28K37)
3 steps
220 10.5 35,800 2.4 23 40 – – – –
CB30U-51
12
.
5
kW
(28K37)
10 lbs.
(
5 k
g)
3
steps
230 11.5 39,200 2.4 24 42 – – – –
10
lbs.
(5
kg)
240 12.5 42,600 2.4 25 43 – – – –
208 11.3 38,400 2.4 26 45 – – – –
15 kW
ECB29-15CB
(28K38)
3 steps
220 12.6 43,000 2.4 27 48 – – – –
15
kW
(28K38)
10 lbs.
(
5 k
g)
3
steps
230 13.5 47,000 2.4 28 49 – – – –
10
lbs.
(5
kg)
240 15.0 51,200 2.4 29 52 – – – –
208 15.0 51,200 2.4 48 45 – – – –
20 kW
ECB29-20CB
(28K39)
4 steps
220 16.8 57,300 2.4 51 48 – – – –
20
kW
(28K39)
14 lbs.
(
6 k
g)
4
steps
230 18.4 62,700 2.4 53 49 – – – –
14
lbs.
(6
kg)
240 20.0 68,200 2.4 55 52 – – – –
208 18.8 64,100 2.4 41 38 38
25 kW
ECB29-25CB
(28K40)
5 steps
220 21.0 71,700 2.4 43 40 40
25
kW
(28K40)
18 lbs.
(
8 k
g)
5
steps
230 23.0 78,300 2.4 45 42 42
18
lbs.
(8
kg)
240 25.0 85,300 2.4 47 43 43
ECB29-5
(28K31)
208 3.8 12,800 3.9 28 – – – – – – – –
5kW
(28K31)
ECB29-5CB
1 step
220 4.2 14,300 3.9 29 – – – – – – – –
5
kW
ECB29
-
5CB
(28K32)
(k)
1
step
230 4.6 15,700 3.9 30 – – – – – – – –
()
4 lbs. (2 kg) 240 5.0 17,100 3.9 31 – – – – – – – –
ECB29-8
(28K33)
208 6.0 20,500 3.9 41 – – – – – – – –
8kW
(28K33)
ECB29-8CB
2 steps
220 6.7 22,900 3.9 43 – – – – – – – –
8
kW
ECB29
-
8CB
(28K34)
(k)
2
steps
230 7.3 25,100 3.9 45 – – – – – – – –
()
4 lbs. (2 kg) 240 8.0 27,300 3.9 47 – – – – – – – –
ECB29-10
(28K35)
208 7.5 25,600 3.9 50 – – – – – – – –
10 kW
(28K35)
ECB29-10CB
2 steps
220 8.4 28,700 3.9 53 – – – – – – – –
10
kW
ECB29
-
10CB
(28K36)
(k)
2
steps
230 9.2 31,400 3.9 55 – – – – – – – –
()
5 lbs. (2 kg) 240 10.0 34,100 3.9 57 – – – – – – – –
208 9.4 32,000 3.9 24 38 – – – –
12 5 kW
ECB29-12.5CB
(28K37)
3 steps
220 10.5 35,800 3.9 25 40 – – – –
12
.
5
kW
(28K37)
10 lbs.
(
5 k
g)
3
steps
230 11.5 39,200 3.9 26 42 – – – –
CB30M-65
CB30U 65
10
lbs.
(5
kg)
240 12.5 42,600 3.9 27 43 – – – –
CB30U-65 208 11.3 38,400 3.9 28 45 – – – –
15 kW
ECB29-15CB
(28K38)
3 steps
220 12.6 43,000 3.9 29 48 – – – –
15
kW
(28K38)
10 lbs.
(
5 k
g)
3
steps
230 13.5 47,000 3.9 29 50 – – – –
10
lbs.
(5
kg)
240 15.0 51,200 3.9 31 52 – – – –
208 15.0 51,200 3.9 50 45 – – – –
20 kW
ECB29-20CB
(28K39)
4 steps
220 16.8 57,300 3.9 53 48 – – – –
20
kW
(28K39)
14 lbs.
(
6 k
g)
4
steps
230 18.4 62,700 3.9 55 50 – – – –
14
lbs.
(6
kg)
240 20.0 68,200 3.9 57 52 – – – –
208 18.8 64,100 3.9 43 38 38
25 kW
ECB29-25CB
(28K40)
5 steps
220 21.0 71,700 3.9 45 40 40
25
kW
(28K40)
18 lbs.
(
8 k
g)
5
steps
230 23.0 78,300 3.9 47 42 42
18
lbs.
(8
kg)
240 25.0 85,300 3.9 48 43 43
208 22.5 76,900 3.9 50 45 45
30 kW
ECB29-30CB
(28K41)
5 steps
220 25.2 86,000 3.9 53 48 48
30
kW
(28K41)
19 lbs.
(
9 k
g)
5
steps
230 27.5 94,000 3.9 55 50 50
19
lbs.
(9
kg)
240 30.0 102,400 3.9 57 52 52
{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).
Electric heater capacity only — does not include additional blower motor heat capacity.
Minimum circuit ampacity for blower motor only.