Lennox Elite CBA27UHE Series User manual

Page 1 2017 Lennox Industries Inc.
Corp. 1701-L3
Service Literature May 2017
CBA27UHE
Elite®Series CBA27UHE Units
IT IS HIGHLY RECOMMENDED IF THE AIR HANDLER IS INSTALLED IN A
UNCONDITIONED SPACE THAT A CIRCUIT BREAKER COVER (ORDERED
SEPARATELY) IS USED. ORDER LENNOX CATALOG # 82W01.
CIRCUIT BREAKER
OPENING
CIRCUIT BREAKER
COVER
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take care
while handling this equipment and wear gloves and pro
tective clothing.
Table of Contents
Specifications / Electrical Data Page 2......
Blower Data Page 4......................
Parts Arrangement Page 6................
I Application Page 7......................
II Unit Components Page 7................
III Optional Electric Heat Page 9...........
IV Start Up Page 28.......................
V Typical Operating Characteristics Page 28..
VI Maintenance Page 29...................
VII Wiring Diagrams and Sequence
of Operations Page 32..................
The Elite CBA27UHE units are high efficiency blower coils
featuring an all-aluminum coil. Several models are avail
able in sizes ranging from 1‐1/2 through 5 tons (5.3 through
17.6 kW). The CBA27UHE is an upflow horizontal unit de
signed for HCFC-410A refrigerant. See unit installation in
structions for more detail. A kit is available for downflow ap
plications. CBA27UHE units come with a factory-installed
check / expansion valve for cooling or heat pump applica
tions.
CBA27UHE series units are designed to be matched with 14
SEER air conditioner or heat pump units. While these blower
coil units are designed to be primarily matched with these out
door 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 CBA27UHE 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.
IMPORTANT: Special procedures are required for clean
ing the aluminum coil in this unit. See page 29 in this manual
for information.

Page 2
SPECIFICATIONS
General
Data
Model Number CBA27UHE‐018 CBA27UHE‐024 CBA27UHE‐030 CBA27UHE‐036
Nominal tonnage 1.5 2 2.5 3
Connections Suction (vapor) line (o.d.) - in. sweat 3/4 3/4 3/4 3/4
Liquid line (o.d.) - in. sweat 3/8 3/8 3/8 3/8
Condensate - in. fpt (2) 3/4 (2) 3/4 (2) 3/4 (2) 3/4
Indoor
Coil
Net face area - ft.24.44 4.44 5.0 5.0
Tube outside diameter - in. 3/8 3/8 3/8 3/8
Number of rows 3 3 3 3
Fins per inch 12 12 12 12
Blower Wheel nominal diameter x width - in. 10 x 8 10 x 8 11 x 8 11 x 8
Blower motor output - hp 1/2 1/2 1/2 1/2
1Filters Size of filter - in. 20 x 20 x 1 20 x 20 x 1 20 x 20 x 1 20 x 20 x 1
Shipping Data -1 package - lbs. 137 137 150 150
ELECTRICAL DATA
Voltage - 1 phase - 60hz 208/230V-1ph 208/230V-1ph 208/230V-1ph 208/230V-1ph
Voltage - 3 phase - 60hz - - - - - - - - - 3460V-1ph
2Maximum Overcurrent Protection (unit only) - All voltages 15 15 15 15
Minimum Circuit Ampacity (unit only) - 208/230V 5 5 5 5
Blower Motor Full Load Amps - 208/230V 4.1 4.1 4.1 4.1
Minimum Circuit Ampacity (unit only) - 460V - - - - - - - - - 2.6
Blower Motor Full Load Amps - 460V - - - - - - - - - 2.1
1Disposable frame type filter.
2HACR type circuit breaker or fuse.
3Blower motor is 460V - 1 phase. Optional electric heat is 460V - 3 phase.

Page 3
SPECIFICATIONS
General
Data
Model Number CBA27UHE‐042 CBA27UHE‐048 CBA27UHE‐060
Nominal tonnage 3.5 4 5
Connections Suction (vapor) line (o.d.) - in. sweat 7/8 7/8 7/8
Liquid line (o.d.) - in. sweat 3/8 3/8 3/8
Condensate - in. fpt (2) 3/4 (2) 3/4 (2) 3/4
Indoor
Coil
Net face area - ft.27.22 7.22 8.33
Tube outside diameter - in. 3/8 3/8 3/8
Number of rows 33 3
Fins per inch 12 12 12
Blower Wheel nominal diameter x width - in. 12 x 9 12 x 9 12 x 9
Blower motor output - hp 1 1 1
1Filters Size of filter - in. 20 x 24 x 1 20 x 24 x 1 20 x 24 x 1
Shipping Data -1 package lbs. 186 186 199
ELECTRICAL DATA
Voltage - 1 phase - 60hz 208/230V-1ph 208/230V- 1ph 208/230V- 1ph
Voltage - 3 phase - 60hz - - - 3460V-1ph 3460V-1ph
2Maximum Overcurrent Protection (unit only) - All voltages 15 15 15
Minimum Circuit Ampacity (unit only) - 208/230V 10 10 10
Blower Motor Full Load Amps - 208/230V 7.6 7.6 7.6
Minimum Circuit Ampacity (unit only)V - 460V - - - 5 5
Blower Motor Full Load Amps - 460V - - - 4 4
1Disposable frame type filter.
2HACR type circuit breaker or fuse.
3Blower motor is 460V - 1 phase. Optional electric heat is 460V - 3 phase.

Page 4
BLOWER DATA
CBA27UHE−018 BLOWER PERFORMANCE
External
Static
Pressure
in. w.g.
Air Volume and Motor Watts
Tap 1 Tap 2 Tap 3 Tap 4 Tap 5
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
.10 717 66 707 63 735 74 781 81 959 133
.20 596 58 570 54 636 70 737 91 922 144
.30 473 56 430 48 603 77 697 101 877 150
.40 402 61 335 54 540 81 651 105 846 161
.50 358 67 302 60 492 92 607 117 811 173
.60 295 74 248 63 434 94 561 121 769 179
.70 262 79 202 72 399 103 507 131 727 187
.80 N/A N/A N/A N/A 348 108 459 137 695 196
CBA27UHE−024 BLOWER PERFORMANCE
External
Static
Pressure
in. w.g.
Air Volume and Motor Watts
Tap 1 Tap 2 Tap 3 Tap 4 Tap 5
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
.10 767 78 753 75 826 88 957 131 1095 189
.20 662 68 648 66 791 100 937 142 1063 199
.30 615 76 612 77 750 108 895 149 1040 211
.40 561 83 539 83 711 116 861 160 1010 226
.50 522 87 507 89 681 126 821 172 970 230
.60 450 96 438 93 628 134 778 175 944 237
.70 419 100 411 103 584 142 750 186 905 248
.80 365 110 358 108 521 147 702 194 864 256
CBA27UHE−030 BLOWER PERFORMANCE
External
Static
Pressure
in. w.g.
Air Volume and Motor Watts
Tap 1 Tap 2 Tap 3 Tap 4 Tap 5
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
.10 1061 115 1104 126 1169 154 1212 166 1278 200
.20 941 103 973 118 1070 144 1157 173 1241 210
.30 789 90 848 104 1019 151 1121 185 1201 223
.40 640 83 789 111 991 165 1077 199 1169 233
.50 525 93 728 118 946 175 1038 209 1124 244
.60 469 101 629 128 900 181 1006 215 1100 256
.70 434 104 581 139 851 194 956 230 1051 268
.80 365 116 521 155 754 208 915 237 1000 275
CBA27UHE−036 BLOWER PERFORMANCE
External
Static
Pressure
in. w.g.
Air Volume and Motor Watts at 208V
Tap 1 Tap 2 Tap 3 Tap 4 Tap 5
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
.10 1074 134 1099 147 1264 206 1343 240 1498 340
.20 962 121 1027 143 1222 220 1291 253 1467 344
.30 887 126 989 153 1192 234 1269 266 1433 364
.40 852 136 944 164 1144 242 1224 280 1391 378
.50 791 150 894 172 1111 257 1194 286 1365 383
.60 717 160 820 186 1067 266 1153 297 1320 398
.70 649 168 745 202 1037 270 1118 309 1290 407
.80 606 183 697 213 999 284 1081 317 1247 422

Page 5
BLOWER DATA
CBA27UHE−042 BLOWER PERFORMANCE
External
Static
Pressure
in. w.g.
Air Volume and Motor Watts
Tap 1 Tap 2 Tap 3 Tap 4 Tap 5
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
.10 1282 177 1346 201 1497 261 1489 261 1723 396
.20 1143 159 1278 204 1475 281 1461 273 1690 408
.30 1067 162 1233 209 1447 297 1427 290 1656 434
.40 1024 175 1199 223 1406 315 1407 305 1639 436
.50 920 189 1154 235 1376 320 1360 324 1599 462
.60 923 197 1099 252 1345 338 1328 336 1573 473
.70 838 204 1022 267 1294 358 1303 351 1541 485
.80 815 218 1003 275 1238 375 1228 373 1494 515
CBA27UHE−048 BLOWER PERFORMANCE
External
Static
Pressure
in. w.g.
Air Volume and Motor Watts
Tap 1 Tap 2 Tap 3 Tap 4 Tap 5
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
.10 1359 190 1509 257 1718 362 1773 401 1903 511
.20 1238 174 1473 273 1690 380 1758 419 1899 515
.30 1135 172 1453 289 1658 397 1707 434 1868 535
.40 1090 180 1450 290 1619 412 1687 449 1830 553
.50 1032 195 1374 315 1588 431 1660 465 1801 558
.60 980 204 1336 331 1561 440 1618 472 1770 582
.70 929 223 1295 339 1510 457 1593 493 1733 600
.80 867 235 1227 363 1488 473 1552 508 1703 618
CBA27UHE−060 BLOWER PERFORMANCE
External
Static
Pressure
in. w.g.
Air Volume and Motor Watts
Tap 1 Tap 2 Tap 3 Tap 4 Tap 5
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
.10 1404 206 1704 340 1886 453 1928 481 2268 800
.20 1295 194 1658 349 1849 467 1905 510 2228 829
.30 1256 204 1631 365 1806 489 1869 525 2192 830
.40 1199 217 1594 386 1784 505 1842 546 2169 856
.50 1145 236 1549 394 1751 523 1799 548 2136 870
.60 1091 248 1508 413 1720 534 1775 569 2106 894
.70 978 270 1474 433 1683 549 1741 592 2089 907
.80 946 279 1440 453 1655 566 1709 611 2050 925
REPLACEMENT CIRCUIT BREAKERS
Voltage Description Catalog No. Voltage Description Catalog No.
208/240V −1 Phase
25 amp, 2 pole 41K13
208/240V −3 Phase
30 amp, 3 pole 64W47
30 amp, 2 pole 17K70 35 amp, 3 pole 41K14
35 amp, 2 pole 72K07 40 amp, 3 pole 41K16
40 amp, 2 pole 49K14 45 amp, 3 pole 18M86
45 amp, 2 pole 17K71 50 amp, 3 pole 41K15
50 amp, 2 pole 41K12 60 amp, 3 pole 41K17
60 amp, 2 pole 17K72

Page 6
CBA27UHE PARTS ARRANGEMENT
FIGURE 1
CONTROL BOX
ELECTRIC HEAT
SECTION
BLOWER
COMPARTMENT
COIL
HORIZONTAL
DRAIN PAN
EXPANSION VALVE
(COMPLETE WITH
SCREEN)
*BLOWER ACCESS
PANEL
*COIL ACCESS
PANEL
FILTER ACCESS
PANEL
FILTER

Page 7
FIGURE 2
CBA27UHE CONTROL BOX
BLOWER RELAY
(K20)
TRANSFORMER
(T1)
TERMINAL STRIP
(TB1)
I-APPLICATION
All major blower coil components must be matched ac
cording to Lennox recommendations for the unit to be
covered under warranty. Refer to the Product Specifications
(EHB) 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 / 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
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
See figure 2 for CBA27UHE control box. Line voltage and
electric heat connections are made in the control box. Op
tional 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-Terminal Strip (TB1)
CBA27UHE 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 out
door unit low voltage wiring connections to TB1 may be
spliced with wire nuts inside the CB units.
Y1 to Y2 Jumper
A factory installed jumper will be installed between “Y1 and
“Y2” for single-stage stage cooling. Remove the jumper for
two-stage cooling.
R to W2 Jumper
A factory installed jumper will be installed between “R“ and
“W2” for single-stage heat pump applications. Remove the
jumper for two-stage non-heat-pump application.

Page 8
C-Transformer (T1)
CBA27UHE 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 volt
age taps as shown in figure 3.
FIGURE 3
BLUE
YELLOW
ORANGE
RED
BLACK
240 VOLTS
208 VOLTS
PRIMARY SECONDARY
208 / 240 VOLT TRANSFORMER
F1
D- Fuse (F1)
All transformers used in the CBA27UHE series units have a
fuse (F1) wired in series on the low secondary side. See fig
ure 3. F1 provides secondary voltage overcurrent protec
tion and is rated at 3 amps.
E-Blower Relay (K20)
CBA27UHE units use a DPDT relay to energize the blow
er motor during a call for electric heat only. When the
relay coil is energized on an electric heat call, a set of
N.O. contacts closes to energize the blower motor on
heating speed.
F-Dehumidification Relay (K183)
Relay K183 is used for dehumidification during cooling
demand. K183 decreases blower speed resulting in an
increase in the amount of moisture taken from the air.
See wiring diagram on page Page 44 and operation se
quence on Page 44 for more detail.
BLOWER ASSEMBLY
FIGURE 4
Motor Terminals
G-Blower Motor (B3)
IMPORTANT
Blower motor features programmed electronic
braking. The integral control brakes the motor
near the end of the supply air blower operation,
allowing the motor to maintain a more controlled
ramping shut-down. Each blower is statically and
dynamically balanced as an assembly before
installation in the unit.

Page 9
CBA27UHE units are equipped with an indoor blower motor
that is permanent magnetic with constant torque. The motor
has 5 signal level speed taps, all referenced to the same sig
nal common. Each tap requires 24 volts to energize.
Multiple Taps Energized
It is acceptable to have more than one tap energized at once
but the micro-controller (integrated in the motor) will default
to the highest tap. For example tap five will have precedence
over tap four.
Input Voltage Requirements
The circuit is designed to be operated with AC voltage. To
enable a tap requires 12 to 33VAC. Expected current draw
will be less than 20mA.
Troubleshooting
Troubleshooting the motor is an easy process. Follow steps
below.
1- Shut off power to unit.
2- Remove input plug from motor. Turn power back on
to unit.
3- Check for 230 volts across terminals “L” and “N” on
the input plug. See figure4. If voltage is present con
tinue. If voltage is not present problem may be may
be up stream of the motor input plug.
4- Check for 24 volts across terminals “C” and speed
tap used (1, 2, 3, 4 or 5) on the input plug. See figure
4. If 24 volts is not present problem may be up stream
of the motor input plug.
If correct voltage is present in steps 3 and 4 and motor is not
operating properly, replace motor. The motor is not field re
pairable.
H-Coil
CBA27UHE units have dual slab coils arranged in an “A”
configuration. Each coil has two or three rows of aluminum
tubes fitted with ripple-edged aluminum fins. An expansion
valve complete with screen, feeds multiple parallel circuits
through the coils. The coil is designed to easily slide out of the
unit cabinet.
I-Condensate Drain Pans
Both upflow/downflow and horizontal drain pans are pro
vided and installed on the CBA27UHE units. The drain pans
are made from fiberglass filled plastic. The drain hole on
horizontal pans are used for right‐hand discharge only, and
must be plugged when the unit is configured for left‐hand
discharge.
III-OPTIONAL ECB29 ELECTRIC HEAT
A-Matchups and Ratings
The Electric Heat Data on pages 15-25 show all approved
CBA27UHE to ECB29 matchups and electrical ratings.
B-Electric Heat Components
ECB29 parts arrangement is shown in figures 5 through 10. All
electric heat sections consist of components mounted to the
electric heat vestibule panel and electric heating elements ex
posed directly to the air stream. 208/230V electric heat sec
tions may be equipped with circuit breakers. The circuit
breakers are designated by CB in the model number. The
electric heat section is connected to the unit via jack J2,
which plugs into plug P2 of the unit.
Electric Heat Sequencer Relays
(K32, K33, K34, K35, K116, K117) (208/230 volt only)
Relays K32, K33, K34, K35, K116 and K117 are N.O.
sequencer relays with a resistive element for a coil
and a bi‐metal disk which actuates the contacts. The
relays are located on the electric heat vestibule panel and
are energized by a 24V heating demand (W1, W2, and
W3) via 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.
Primary(S15) & Secondary(S20) Temperature Limits
Both the primary (S15) and secondary (S20) limits are lo
cated on the electric heat vestibule panel and are exposed
directly to the air stream through an opening in the panel.
The high temperature limits are SPST N.C. limits with the
primary limit being an auto‐reset limit and the secondary
limit being a “one‐time” limit. One‐time limits need to be 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 S15 or S20 opens, the corre
sponding heat element is de‐energized. All other
heating elements remain energized. The primary high
temperature limit opens at 150_F + 5_F (65.5_C + 2.8_C)
on a temperature rise and automatically resets at
110_F + 9_F (43.3_C + 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.

Page 10
Circuit Breaker (CB1, CB2, and CB3)
(208/230 volt only)
Line voltage connections are made to circuit breakers
CB1, CB2, and CB3 in the electric heat sections with circuit
breakers (designated by CB in the model numbers) then
routed to the CB unit through J/P2 . The Electric Heat Data
on pages 15-25 show the amp rating for each circuit
breaker used. Single-phase electric heat uses two-pole
circuit breakers; while three-phase electric heat uses
three-pole circuit breakers.
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 then routed to the CB unit through J/P2 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.
Heating Elements (HE1 through HE6)
Heating elements are composed of helix wound bare
nichrome wire exposed directly to the air stream. The
elements are supported by insulators mounted to the
wire frame. For single-phase applications, one ele
ment is used per stage. Each stage is energized in
dependently by the corresponding relay located on
the electric heat vestibule panel. All three-phase
heating elements are arranged in a three-phase del
ta. Once energized, heat transfer is instantaneous.
High temperature protection is provided by primary
and secondary high temperature limits.
FIGURE 5
ECB29‐2.5, ‐5, ‐5CB, -6, -6CB 208/230 SINGLE-PHASE
ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT
TERMINAL BLOCK
(TB2)
CIRCUIT BREAKER
(CB1)
PRIMARY LIMIT (S15)
& SECONDARY LIMIT (S20)
ELECTRIC HEAT
ELEMENT (HE1)
ELECTRIC HEAT
VESTIBULE PANEL
ELECTRIC HEAT
SEQUENCER RELAY (K32)

Page 11
FIGURE 6
ECB29‐8, ‐8CB, 9CB, ‐10, ‐10CB 208/230
SINGLE-PHASE
ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT

Page 12
FIGURE 7
ECB29‐12.5CB, ‐15CB 208/230 SINGLE PHASE
ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT

Page 13
FIGURE 8
ECB29‐8, ‐10 208/230 THREE PHASE
ECB29-15CB 208/230 THREE PHASE
ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT

Page 14
FIGURE 9
ECB29‐20CB 208/230 SINGLE-PHASE
ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT

Page 15
FIGURE 10
ECB29‐25CB, ‐30CB 208/230 SINGLE-PHASE
ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT

Page 16
FIGURE 11
ECB29‐20CB, ‐25CB 208/230 THREE-PHASE
ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT

Page 17
ELECTRIC HEAT DATA −CBA27UHE−018
Model Number
No.
of
Stages
Input 2Blower
Motor
Full
Load
Amps
3Minimum
Circuit
Ampacity
5Maximum
Overcurrent
Protection
Volts kW 1Btuh
SINGLE PHASE
2.5 kW
4 lbs.
ECB29−2.5 (12L27)
Terminal Block
1 208 1.9 6,400 4.1 16 20
220 2.1 7,200 4.1 18 20
230 2.3 7,800 4.1 18 20
240 2.5 8,500 4.1 18 20
4 kW
4 lbs.
ECB29−4 (12L30)
Terminal Block
ECB29−4CB (12L45)
30A Circuit breaker
1 208 3.0 10,250 4.1 23 425
220 3.4 11,450 4.1 26 30
230 3.7 12,550 4.1 26 30
240 4.0 13,650 4.1 26 30
5 kW
4 lbs.
ECB29−5 (12L35)
Terminal Block
ECB29−5CB (12L47)
30A Circuit breaker
1 208 3.8 12,800 4.1 28 30
220 4.2 14,300 4.1 31 435
230 4.6 15,700 4.1 31 435
240 5.0 17,100 4.1 31 435
6 kW
4 lbs.
ECB29−6 (12L44)
Terminal Block
ECB29−6CB (12L49)
35A Circuit breaker
1 208 4.5 15,400 4.1 32 35
220 5.0 17,100 4.1 36 440
230 5.5 18,800 4.1 36 440
240 6.0 20,500 4.1 36 440
8 kW
5 lbs.
ECB29−8 (12L50)
Terminal Block
ECB29−8CB (12L52)
45A Circuit breaker
1 208 6.0 20,500 4.1 41 45
220 6.7 22,900 4.1 47 450
230 7.3 25,100 4.1 47 450
240 8.0 27,300 4.1 47 450
9 kW
5 lbs.
ECB29−9CB (13T79)
60A Circuit breaker
2 208 6.8 23,100 4.1 46 450
220 7.6 25,800 4.1 52 60
230 8.3 28,200 4.1 52 60
240 9.0 30,700 4.1 52 60
10 kW
6 lbs.
ECB29−10 (13T83)
Terminal Block
ECB29−10CB (13T87)
60A Circuit breaker
2 208 7.5 25,600 4.1 50 450
220 8.4 28,700 4.1 57 60
230 9.2 31,400 4.1 57 60
240 10.0 34,100 4.1 57 60
NOTE −Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps.
1Electric heater capacity only −does not include additional blower motor heat capacity.
2Amps shown are for blower motor only.
3
Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167F
.
4Bold text indicates that the circuit breaker on “CB” circuit breaker models must be replaced with size noted. SeeTable on Page9.
5HACR type circuit breaker or fuse.

Page 18
ELECTRIC HEAT DATA −CBA27UHE−024
Model Number
No.
of
Stages
Input 2Blower
Motor
Full
Load
Amps
3Minimum
Circuit
Ampacity
5Maximum
Overcurrent
Protection
Volts kW 1Btuh
SINGLE PHASE
4 kW
4 lbs.
ECB29−4 (12L30)
Terminal Block
ECB29−4CB (12L45)
30A Circuit breaker
1 208 3.0 10,250 4.1 23 425
220 3.4 11,450 4.1 26 30
230 3.7 12,550 4.1 26 30
240 4.0 13,650 4.1 26 30
5 kW
4 lbs.
ECB29−5 (12L35)
Terminal Block
ECB29−5CB (12L47)
30A Circuit breaker
1 208 3.8 12,800 4.1 28 30
220 4.2 14,300 4.1 31 435
230 4.6 15,700 4.1 31 435
240 5.0 17,100 4.1 31 435
6 kW
4 lbs.
ECB29−6 (12L44)
Terminal Block
ECB29−6CB (12L49)
35A Circuit breaker
1 208 4.5 15,400 4.1 32 35
220 5.0 17,100 4.1 36 440
230 5.5 18,800 4.1 36 440
240 6.0 20,500 4.1 36 440
8 kW
5 lbs.
ECB29−8 (12L50)
Terminal Block
ECB29−8CB (12L52)
45A Circuit breaker
1 208 6.0 20,500 4.1 41 45
220 6.7 22,900 4.1 47 450
230 7.3 25,100 4.1 47 450
240 8.0 27,300 4.1 47 450
9 kW
5 lbs.
ECB29−9CB (13T79)
60A Circuit breaker
2 208 6.8 23,100 4.1 46 450
220 7.6 25,800 4.1 52 60
230 8.3 28,200 4.1 52 60
240 9.0 30,700 4.1 52 60
10 kW
6 lbs.
ECB29−10 (13T83)
Terminal Block
ECB29−10CB (13T87)
60A Circuit breaker
2 208 7.5 25,600 4.1 50 450
220 8.4 28,700 4.1 57 60
230 9.2 31,400 4.1 57 60
240 10.0 34,100 4.1 57 60
NOTE −Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps.
1Electric heater capacity only −does not include additional blower motor heat capacity.
2Amps shown are for blower motor only.
3
Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167F
.
4Bold text indicates that the circuit breaker on “CB” circuit breaker models must be replaced with size noted. SeeTable on Page9.
5HACR type circuit breaker or fuse.

Page 19
ELECTRIC HEAT DATA −CBA27UHE−030
Model Number
No.
of
Stages
Input 2Blower
Motor
Full
Load
Amps
3Minimum
Circuit
Ampacity
5Maximum
Overcurrent
Protection
Single Point
Power Source
Volts kW 1Btuh Ckt 1 Ckt 2 Ckt 1 Ckt 2
3Minimum
Circuit
Ampacity
5Maximum
Overcurrent
Protection
SINGLE PHASE
4 kW
4 lbs.
ECB29−4 (12L30)
Terminal Block
ECB29−4CB (12L45)
30A Circuit breaker
1 208 3.0 10,250 4.1 23 −−−425 −−−−−−−−−
220 3.4 11,450 4.1 26 −−−30 −−−−−−−−−
230 3.7 12,550 4.1 26 −−−30 −−−−−−−−−
240 4.0 13,650 4.1 26 −−−30 −−−−−−−−−
5 kW
4 lbs.
ECB29−5 (12L35)
Terminal Block
ECB29−5CB (12L47)
30A Circuit breaker
1 208 3.8 12,800 4.1 28 −−−30 −−−−−−−−−
220 4.2 14,300 4.1 31 −−−435 −−−−−−−−−
230 4.6 15,700 4.1 31 −−−435 −−−−−−−−−
240 5.0 17,100 4.1 31 −−−435 −−−−−−−−−
6 kW
4 lbs.
ECB29−6 (12L44)
Terminal Block
ECB29−6CB (12L49)
35A Circuit breaker
1 208 4.5 15,400 4.1 32 −−−35 −−−−−−−−−
220 5.0 17,100 4.1 36 −−−440 −−−−−−−−−
230 5.5 18,800 4.1 36 −−−440 −−−−−−−−−
240 6.0 20,500 4.1 36 −−−440 −−−−−−−−−
8 kW
5 lbs.
ECB29−8 (12L50)
Terminal Block
ECB29−8CB (12L52)
45A Circuit breaker
1 208 6.0 20,500 4.1 41 −−−45 −−−−−−−−−
220 6.7 22,900 4.1 47 −−−450 −−−−−−−−−
230 7.3 25,100 4.1 47 −−−450 −−−−−−−−−
240 8.0 27,300 4.1 47 −−−450 −−−−−−−−−
9 kW
5 lbs.
ECB29−9CB (13T79)
60A Circuit breaker
60A Circuit breaker
2 208 6.8 23,100 4.1 46 −−−450 −−−−−−−−−
220 7.6 25,800 4.1 52 −−−60 −−−−−−−−−
230 8.3 28,200 4.1 52 −−−60 −−−−−−−−−
240 9.0 30,700 4.1 52 −−−60 −−−−−−−−−
10 kW
6 lbs.
ECB29−10 (13T83)
Terminal Block
ECB29−10CB (13T87)
60A Circuit breaker
2 208 7.5 25,600 4.1 50 −−−450 −−−−−−−−−
220 8.4 28,700 4.1 57 −−−60 −−−−−−−−−
230 9.2 31,400 4.1 57 −−−60 −−−−−−−−−
240 10.0 34,100 4.1 57 −−−60 −−−−−−−−−
12.5 kW
10 lbs.
ECB29−12.5CB (13T88)
(1) 25A Circuit breaker
& (1) 50A Circuit breaker
2 208 9.4 32,000 4.1 24 38 25 440 62 70
220 10.5 35,800 4.1 27 43 430 445 70 70
230 11.5 39,200 4.1 27 43 430 445 70 70
240 12.5 42,600 4.1 27 43 430 445 70 70
15 kW
12 lbs.
ECB29−15CB (13T91)
(1) 30A Circuit breaker
& (1) 60A Circuit Breaker
2 208 11.3 38,400 4.1 28 45 30 445 73 80
220 12.6 43,000 4.1 31 52 435 60 83 90
230 13.8 47,000 4.1 31 52 435 60 83 90
240 15.0 51,200 4.1 31 52 435 60 83 90
THREE PHASE
8 kW
5 lbs.
ECB29−8 (12L61)
Terminal Block
1 208 6.0 20,500 4.1 26 −−−30 −−−−−−−−−
220 6.7 22,900 4.1 29 −−−30 −−−−−−−−−
230 7.3 25,100 4.1 29 −−−30 −−−−−−−−−
240 8.0 27,300 4.1 29 −−−30 −−−−−−−−−
10 kW
6 lbs.
ECB29−10 (12L62)
Terminal Block
1 208 7.5 25,600 4.1 31 −−−35 −−−−−−−−−
220 8.4 28,700 4.1 35 −−−35 −−−−−−−−−
230 9.2 31,400 4.1 35 −−−35 −−−−−−−−−
240 10.0 34,100 4.1 35 −−−35 −−−−−−−−−
15 kW
12 lbs.
ECB29−15CB (12L63)
(1) 50A Circuit breaker
1 208 11.3 38,400 4.1 44 −−−45 −−−−−−−−−
220 12.6 43,000 4.1 50 −−−50 −−−−−−−−−
230 13.5 47,000 4.1 50 −−−50 −−−−−−−−−
240 15.0 51,200 4.1 50 −−−50 −−−−−−−−−
NOTE −Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps.
1Electric heater capacity only −does not include additional blower motor heat capacity.
2Amps shown are for blower motor only.
3
Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167F.
4Bold text indicates that the circuit breaker on “CB” circuit breaker models must be replaced with size noted. SeeTable on Page9.
5HACR type circuit breaker or fuse.

Page 20
ELECTRIC HEAT DATA −CBA27UHE−036
Model Number
No.
of
Stages
Input 2Blower
Motor
Full
Load
Amps
3Minimum
Circuit
Ampacity
5Maximum
Overcurrent
Protection
Single Point
Power Source
Volts kW 1Btuh Ckt 1 Ckt 2 Ckt 1 Ckt 2
3Minimum
Circuit
Ampacity
5Maximum
Overcurrent
Protection
SINGLE PHASE
4 kW
4 lbs.
ECB29−4 (12L30)
Terminal Block
ECB29−4CB (12L45)
30A Circuit breaker
1 208 3.0 10,250 4.1 23 −−−425 −−−−−−−−−
220 3.4 11,450 4.1 26 −−−30 −−−−−−−−−
230 3.7 12,550 4.1 26 −−−30 −−−−−−−−−
240 4.0 13,650 4.1 26 −−−30 −−−−−−−−−
5 kW
4 lbs.
ECB29−5 (12L35)
Terminal Block
ECB29−5CB (12L47)
30A Circuit breaker
1 208 3.8 12,800 4.1 28 −−−30 −−−−−−−−−
220 4.2 14,300 4.1 31 −−−435 −−−−−−−−−
230 4.6 15,700 4.1 31 −−−435 −−−−−−−−−
240 5.0 17,100 4.1 31 −−−435 −−−−−−−−−
6 kW
4 lbs.
ECB29−6 (12L44)
Terminal Block
ECB29−6CB (12L49)
35A Circuit breaker
1 208 4.5 15,400 4.1 32 −−−35 −−−−−−−−−
220 5.0 17,100 4.1 36 −−−440 −−−−−−−−−
230 5.5 18,800 4.1 36 −−−440 −−−−−−−−−
240 6.0 20,500 4.1 36 −−−440 −−−−−−−−−
8 kW
5 lbs.
ECB29−8 (12L50)
Terminal Block
ECB29−8CB (12L52)
45A Circuit breaker
1 208 6.0 20,500 4.1 41 −−−45 −−−−−−−−−
220 6.7 22,900 4.1 47 −−−450 −−−−−−−−−
230 7.3 25,100 4.1 47 −−−450 −−−−−−−−−
240 8.0 27,300 4.1 47 −−−450 −−−−−−−−−
9 kW
5 lbs.
ECB29−9CB (13T79)
60A Circuit breaker
2 208 6.8 23,100 4.1 46 −−−450 −−−−−−−−−
220 7.6 25,800 4.1 52 −−−60 −−−−−−−−−
230 8.3 28,200 4.1 52 −−−60 −−−−−−−−−
240 9.0 30,700 4.1 52 −−−60 −−−−−−−−−
10 kW
6 lbs.
ECB29−10 (13T83)
Terminal Block
ECB29−10CB (13T87)
60A Circuit breaker
2 208 7.5 25,600 4.1 50 −−−450 −−−−−−−−−
220 8.4 28,700 4.1 57 −−−60 −−−−−−−−−
230 9.2 31,400 4.1 57 −−−60 −−−−−−−−−
240 10.0 34,100 4.1 57 −−−60 −−−−−−−−−
12.5 kW
10 lbs.
ECB29−12.5CB (13T88)
(1) 25A Circuit breaker and
(1) 50A Circuit breaker
2 208 9.4 32,000 4.1 24 38 25 440 62 70
220 10.5 35,800 4.1 27 43 430 445 70 70
230 11.5 39,200 4.1 27 43 430 445 70 70
240 12.5 42,600 4.1 27 43 430 445 70 70
15 kW
12 lbs.
ECB29−15CB (13T91)
(1) 30A Circuit breaker and
(1) 60A Circuit Breaker
2 208 11.3 38,400 4.1 28 45 30 445 73 80
220 12.6 43,000 4.1 31 52 435 60 83 90
230 13.8 47,000 4.1 31 52 435 60 83 90
240 15.0 51,200 4.1 31 52 435 60 83 90
20 kW
19 lbs.
ECB29−20CB (13T92)
(1) 50A Circuit breaker and
(1) 60A Circuit Breaker
2 208 15.0 51,200 4.1 46 50 50 450 96 100
220 16.8 57,300 4.1 52 57 460 60 109 125
230 18.4 62,700 4.1 52 57 460 60 109 125
240 20.0 68,200 4.1 52 57 460 60 109 125
NOTE −Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps.
1Electric heater capacity only −does not include additional blower motor heat capacity.
2Amps shown are for blower motor only.
3
Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167F
.
4Bold text indicates that the circuit breaker on “CB” circuit breaker models must be replaced with size noted. SeeTable on Page9.
5HACR type circuit breaker or fuse.