Lennox ELITE 10 CB29M Series Unit Information
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Lennox ELITE 10 CB29M Series Unit Information

Including ecb29 electric heat
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Service Literature
ELITE 10 CB29M and ELITE 12 CB30M SERIES UNITS
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.
Corp. 9711–L7
INCLUDING ECB29 ELECTRIC HEAT
CB29M
Page 1
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
CB30M

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Summary of Contents for Lennox ELITE 10 CB29M Series

  • Page 1 CB29M CB30M Corp. 9711–L7 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 While these blower coil units are designed to be primarily blower coils.

  • Page 2: Ecb29-8

    SPECIFICATIONS –CB29M Model Number CB29M-21/26 CB29M-31 CB29M-41 CB29M-46 CB29M-51 CB29M-65 Net face area — ft. 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) Number of rows...
  • Page 3 BLOWER DATA – CB29M CB29M-21/26 BLOWER PERFORMANCE (208/230v) Air Volume and Motor Watts at Specific Blower Taps External Static External Static Pressure High Medium in. w.g. Watts Watts Watts 1025 1010 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) Air Volume and Motor Watts at Specific Blower Taps External Static Pressure High Medium in. w.g. Watts Watts Watts 1455 1120 1445 1120 1430 1120 1420 1115 1400 1110 1385 1105 1365...
  • Page 5 BLOWER DATA – CB29M CB29M-51 BLOWER PERFORMANCE (460v – 1 ph) Air Volume and Motor Watts at Specific Blower Taps External Static Pressure High Medium in. w.g. Watts Watts Watts 2135 1010 1895 1695 2110 1875 1675 2080 1855 1660 2055 1830 1640...

  • Page 6: Ecb29-12.5Cb

    SPECIFICATIONS – CB30M Model Number CB30M-21/26 CB30M-31 CB30M-41 CB30M-46 CB30M-51 CB30M-65 Net face area — ft. 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)
  • Page 7 BLOWER DATA – CB30M CB30M-21/26 BLOWER PERFORMANCE (208/230v) Air Volume and Motor Watts at Specific Blower Taps External Static External Static Pressure High Medium in. w.g. Watts Watts Watts 1030 1015 1000 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) Air Volume and Motor Watts at Specific Blower Taps External Static Pressure High in. w.g. Watts Watts 1525 1120 1520 1150 1510 1170 1495 1180 1475 1190 1450 1185 1415 1175 1335 1135 1230 1060...
  • Page 9 BLOWER DATA – CB30M CB30M-51 BLOWER PERFORMANCE (460v – 1 ph) Air Volume and Motor Watts at Specific Blower Taps External Static Pressure High in. w.g. Watts Watts 1870 1775 1875 1775 1870 1765 1850 1750 1825 1720 1790 1685 1745 1645 1625...
  • Page 10 CB29M & CB30M PARTS ARRANGEMENT ELECTRIC HEAT SECTION CONTROL BOX BLOWER COMPARTMENT BLOWER ACCESS PANEL HORIZONTAL DRAIN PAN COIL COIL ACCESS EXPANSION PANEL VALVE FIGURE 1 CB29M and CB30M CONTROL BOX SMALL ELECTRIC HEAT TERMINAL KNOCK OUT FOR STRIP (TB1) 2.5 –...
  • Page 11 I–APPLICATION 208 / 240 VOLT TRANSFORMER All major blower coil components must be matched according to Lennox recommendations for the unit to PRIMARY SECONDARY be covered under warranty. Refer to the Engineering Handbook for approved system matchups. A misapplied ORANGE...
  • Page 12 internal wiring tap. This is done by the blower relay (K3). For more information refer to Service and Applica- BLOWER ASSEMBLY tion Note (Corp. 8909–L7) on 460 volt blower motor windings. J–Blower Motor Capacitor (C4) BLOWER HOUSING All CB29M and CB30M series units use single phase direct drive motors with a run capacitor.

  • Page 13: Table Of Contents

    TABLE 2– ELECTRIC HEAT DATA (1 PHASE) – CB29M–21/26 & CB29M–31 *Minimum DBlower Electric Heat kW, Blower Coil Number of Volts **Btuh Circuit Ampacity Model Number Motor Model Number Model Number Steps Steps Input Input Input Input Input Input & Shipping Weight Amps Circuit 1 Circuit 2...

  • Page 14: Table Of Contents

    TABLE 3– ELECTRIC HEAT DATA (1 PHASE) – CB29M–41 & CB29M–46 *Minimum DBlower Electric Heat kW, Blower Coil Number of Volts **Btuh Circuit Ampacity Model Number Motor Model Number Model Number Steps Steps Input Input Input Input Input Input & Shipping Weight Amps Circuit 1 Circuit 2...
  • Page 15 TABLE 4– ELECTRIC HEAT DATA (1 PHASE) – CB29M–51 & CB29M–65 DBlower Blower Coil Electric Heat kW, *Minimum Circuit Ampacity Number of Volts **Btuh Model Model Model Number Model Number Motor Motor Steps Input Input Input Number & Shipping Weight Amps Circuit 1 Circuit 2...

  • Page 16: Ecb29-15Cb

    TABLE 5– ELECTRIC HEAT DATA (3 PHASE) – CB29M–41 & CB29M–46, CB29M–51 & CB29M–65 DBlower Blower Coil Electric Heat kW, *Minimum Circuit Ampacity Number of Volts **Btuh Model Model Model Number Model Number Motor Motor Steps Input Input Input Number &...
  • Page 17 TABLE 6– ELECTRIC HEAT DATA (3 PHASE) – CB29M–41, CB29M–51 CB29M–65 DBlower Blower Coil Electric Heat kW, Number of Volts **Btuh *Minimum Circuit Model Model Model Number Model Number Motor Motor Steps Input Input Input Ampacity Number & Shipping Weight Amps b 460v–3 ph b 28,700...
  • Page 18 TABLE 7– ELECTRIC HEAT DATA (1 PHASE) – CB30M–21/26 & CB30M–31 {Minimum Blower Electric Heat kW, Btuh Blower Coil Number of Volts Circuit Ampacity Model Number Motor Model Number Model Number Steps Steps Input Input Input Input Input Input & Shipping Weight Amps Circuit 1 Circuit 2...

  • Page 19: Ecb29-10

    TABLE 8– ELECTRIC HEAT DATA (1 PHASE) – CB30M–41 & CB30M–46 {Minimum Blower Electric Heat kW, Btuh Blower Coil Number of Volts Circuit Ampacity Model Number Motor Model Number Model Number Steps Steps Input Input Input Input Input Input & Shipping Weight Amps Circuit 1 Circuit 2...
  • Page 20 TABLE 9– ELECTRIC HEAT DATA (1 PHASE) – CB30M–51 & CB30M–65 Blower {Minimum Circuit Ampacity Blower Coil Electric Heat kW, Btuh Number of Volts Model Model Model Number Model Number Motor Motor Steps Input Input Input Number & Shipping Weight Amps Circuit 1 Circuit 2...
  • Page 21 TABLE 10– ELECTRIC HEAT DATA (3 PHASE) – CB30M–41, CB30M–46, CB30M–51 & CB30M–65 Blower {Minimum Circuit Ampacity Blower Coil Electric Heat kW, Btuh Number of Volts Model Model Model Number Model Number Motor Motor Steps Input Input Input Number & Shipping Weight Amps Circuit 1 Circuit 2...
  • Page 22 TABLE 11– ELECTRIC HEAT DATA (3 PHASE) – CB30M–41, CB30M–51 & CB30M–65 Blower Blower Coil Electric Heat kW, Btuh {Minimum Circuit Number of Volts Model Model Model Number Model Number Motor Motor Steps Input Input Input Ampacity Number & Shipping Weight Amps b 460v–3 ph b 28,700...
  • Page 23 III–OPTIONAL ECB29 ELECTRIC HEAT 4–Primary(S15) & Secondary(S20) Temperature Limits Both the primary (S15) and secondary (S20) limits are A–Matchups and Ratings located on the electric heat vestibule panel and are exposed directly to the airstream through an opening Tables 2 through 11 show all approved CB29M and in the panel.
  • Page 24 5–Circuit Breaker (CB1, CB2, and CB3) TABLE 13 (208/230 volt only) ECB29 460/575 VOLTAGE FUSES 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 num- UNIT FUSE SIZE (AMPS) bers).
  • Page 25 ECB29-2.5, -5, -5CB 208/230 SINGLE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT ELECTRIC HEAT VESTIBULE PANEL ELECTRIC HEAT ELEMENT (HE1) PRIMARY LIMIT (S15) & SECONDARY LIMIT (S20) TERMINAL BLOCK (TB2) ELECTRIC HEAT SEQUENCER RELAY (K32) CIRCUIT BREAKER (CB1) FIGURE 5 ECB29-8, -8CB, -10, -10CB 208/230 SINGLE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT ELECTRIC HEAT VESTIBULE PANEL...
  • Page 26 ECB29-8, -10 208/230 THREE PHASE ECB29-12.5CB, -15CB 208/230 SINGLE & THREE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT ELECTRIC HEAT ELEMENT (HE3) ELECTRIC HEAT ELECTRIC HEAT ELEMENT (HE2) ELECTRIC HEAT SEQUENCER RELAY (K33) VESTIBULE PANEL CIRCUIT BREAKER (CB1) ELECTRIC HEAT ELEMENT (HE1) PRIMARY LIMIT (S15) &...
  • Page 27 ECB29-20CB, -25CB 208/230 THREE PHASE ELECTRIC HEAT ELEMENT (HE1 & HE2) ECB29-25CB, -30CB 208/230 SINGLE PHASE (not shown) ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT ELECTRIC HEAT ELECTRIC HEAT ELEMENT (HE6) ELECTRIC HEAT ELEMENT (HE4) SEQUENCER RELAY (K33) ELECTRIC HEAT VESTIBULE PANEL PRIMARY LIMIT (S15) &...
  • Page 28 IV–CONFIGURATION MODIFICATIONS C–Downflow Application 1– Remove drip shields shipped in the right corner CB29M and CB30M units may be installed in the upflow, packaging post. The shields are used for downflow downflow, horizontal right–hand discharge or horizontal applications only and may need to be field fabricated left–hand discharge orientation.
  • Page 29 NOTE-For horizontal applications, a secondary drain pan is recommended. Refer to local codes. BLOWER COIL UNIT 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.
  • Page 30 E–Horizontal Left–Hand Discharge Application NOTE-For horizontal applications, a secondary drain pan TOP CAP is recommended. Refer to local codes. 1– Discard drip shields, if applicable. The shields are used for downflow applications only. BACK COIL END 2– Pull coil assembly from unit. Pull off the horizontal SEAL BEND drain pan.
  • Page 31 F–Condensate Drain 7– Auxiliary drain should run to an area where home- owner will notice it draining. Refer to local codes. 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.
  • Page 32 VI–TYPICAL OPERATING CHARACTERISTICS C–Blower Speed Taps Blower speed tap selection is accomplished by A–Blower Operation and Adjustment changing the taps at the blower motor harness con- NOTE– The following is a generalized procedure nector. Disconnect harness connector from motor to and does not apply to all thermostat controls.
  • Page 33 VII–MAINTENANCE size filters can be used. Filters should be inspected monthly and must be replaced when dirty to ensure At the beginning of each heating/cooling season, the proper blower coil operation. See table 15 for re- system should be checked as follows: placement filter sizes or see the sticker located on the filter access door specifying the size of the standard A–Filters...
  • Page 34 VIII–WIRING DIAGRAMS AND SEQUENCE OF OPERATIONS A–CB29M & CB30M – 208/230V SINGLE PHASE – SEQUENCE OF OPERATION 1- Line voltage is routed to transformer T1 and 5- Economizer relay K43 (if used) is energized after K32-1 blower motor B3. closes (see electric heat section). 2- T1 supplies 24VAC to terminal strip TB1, which 6- K43-1 closes energizing the economizer with 24VAC.
  • Page 35 B–CB29M – 460 and 575V THREE PHASE – SEQUENCE OF OPERATION 1- In 460 volt units, line voltage is routed to transformer 5- Blower motor B3 is energized on heating speed after T1 and blower motor B3. K36-3 closes (see electric heat). 2- In 575 volt units, line voltage is routed to transformer 6- The economizer, if used, is energized after K36-2 T26.
  • Page 36 C–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 3- Assuming the N.C. primary (S15) and secondary energizes the electric heat relay K32 with 24VAC. (S20) limit switches are closed, electric heat element HE1 is energized.
  • Page 37 D–ECB29-10, -10CB – 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 energizes the electric heat relay K32 with 24VAC. 4- When K32-2 closes, the unit is ready for a second stage heat demand.
  • Page 38 E–ECB29-12.5CB, -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 4- When K32-2 closes, the unit is ready for a second energizes the electric heat relay K32 with 24VAC.
  • Page 39 F–ECB29-20CB – 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 energizes the electric heat relays K32 and K33 5- When K33-1 closes, the unit is ready for a second with 24VAC.
  • Page 40 G–ECB29-25CB, -30CB – 208/230V SINGLE PHASE – SEQUENCE OF OPERATION FIRST STAGE HEAT 5- When K33-1 closes, the blower (if not energized) is en- ergized on heating speed and economizer heat relay 1- When there is a call for heat, W1 of the thermostat K43 is energized (see 208/230VAC CB schematic).
  • Page 41 H–ECB29-5, -8, -10, -15CB – 208/230V THREE PHASE – SEQUENCE OF OPERATION 1- When there is a call for heat, W1 of the thermostat K43 is energized (see 208/230VAC CB schematic). energizes the electric heat relays K32 and K33 3- When K32-1, K32-2, and K33-2 closes, assuming the with 24VAC.
  • Page 42 I–ECB29-20CB, -25CB – 208/230V THREE 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 energizes the electric heat relays K32 and K34 5- When K34-2 closes, the unit is ready for a second with 24VAC.
  • Page 43 J–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 4- When K36-3 closes, the blower is energized on energizes the electric heat relay K36 with 24VAC. heating speed (see 208/230VAC CB schematic).
  • Page 44 NOTES Page 44...

This manual is also suitable for:

Cb30m-21Cb30m-26Cb30m-31Cb30m-41Cb30m-46Elite 12 cb30m series ... Show all

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