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E2011 Lennox Industries Inc.
Dallas, Texas, USA
NOTICE
A thermostat is not included and must be ordered
separately.
D The Lennox icomfort Touch™ thermostat must be used
in communicating applications.
D In non−communicating
®
ComfortSense
7000 thermostat may be used, as well
as other non−communicating thermostats.
In all cases, setup is critical to ensure proper system
operation.
Field wiring for both communicating and non−
communicating applications is illustrated in diagrams,
which begin on page 13.
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.
Shipping and Packing List
Check unit for shipping damage. Consult last carrier
immediately if damage is found.
Package 1 of 1 contains the following:
1
Assembled air handler unit
2
Downflow shields (if required for downflow
configuration only)
1
Drip shield (for −068 only)
IMPORTANT INFORMATION TO INSTALLER
CHECK FOR AND REMOVE THE FOLLOWING ITEMS BEFORE OPERATING UNIT.
A
BLOWER HOUSING SUPPORT PAD.
REFRIGERANT LINE PLUGS (SEE BRAZING CONNECTION
D
ON PAGE 9] .
FOR PROPER OPERATION THE ELECTRIC HEAT (IF APPLICABLE) MUST BE
CONFIGURED (SET−UP) THROUGH THE AIR HANDLER CONTROL (AHC)
H
06/11
*2P0611*
applications,
the Lennox
B
TOP CAP SHIPPING BRACKET (REPLACE
SCREWS IN TOP CAP AFTER REMOVAL).
WHENEVER ELECTRIC HEAT IS INSTALLED THE AHC MUST BE
MANUALLY CONFIGURED. SEE JUMPERS AND LINKS GUIDE ON
PAGE 20.
CONFIGURE ELECTRIC HEAT
ELECTRIC HEAT SECTIONS MUST BE
H
CONFIGURED.
IF
PROCEDURE IN FIGURE 24 ON PAGE 30.
INSTALLATION
INSTRUCTIONS
Dave Lennox Signature
Collection CBX32MV Units
MULTI−POSITION AIR HANDLER
506274−01
06/11
Supersedes 01/11
RETAIN THESE INSTRUCTIONS FOR FUTURE
Table of Contents
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HORIZONTAL DRAIN PAN (SEE
C
UPFLOW APPLICATIONS ON PAGE
5 AND DOWNFLOW APPLICATIONS
ON PAGE 8 )
INSTALLED
SEE
ECB40
Page 1
REFERENCE
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506274−01
*P506274-01*
®
Litho U.S.A.
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Related Manuals for Lennox CBX32MV
Summary of Contents for Lennox CBX32MV
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Page 1: Table Of Contents
Dave Lennox Signature NOTICE Collection CBX32MV Units A thermostat is not included and must be ordered separately. MULTI−POSITION AIR HANDLER D The Lennox icomfort Touch™ thermostat must be used 506274−01 Litho U.S.A. 06/11 in communicating applications. Supersedes 01/11 D In non−communicating... -
Page 2: Upflow/Downflow Unit Dimensions
Upflow and Downflow Unit Dimensions Inches (millimeters) PIPING PLATE DETAIL 3/4 (19) (FOR UPFLOW AND DOWNFLOW POSITIONS) 5/8 (16) SUPPLY AIR OPENING 4-3/8 (111) 1-1/8 (29) SUCTION LINE CONDENSATE DRAINS 5/8 (16) 5/8 (16) (2) (HORIZONTAL) 3/4 (19) RETURN (51) LIQUID LINE OPENING 11-1/16 (281) -
Page 3: Horizontal Lh/Rh Unit Dimensions
1 (25) 5/8 (16) FLOW OPENING 1-1/2 (38) RETURN AIR OPENING 3/4 (19) 1-3/4 5/8 (16) CONDENSATE DRAINS (2) LINE VOLTAGE INLETS (44) (HORIZONTAL) 5-3/4 (BOTTOM AND LEFT SIDE) END VIEW (146) FRONT VIEW END VIEW Page 3 CBX32MV SERIES... -
Page 4: Model Number Identification
WARNING All CBX32MV air handlers are equipped with a factory−installed, internally mounted check / expansion valve (CTXV), which is suitable for use in HFC−410A During blower operation, the ECM motor emits energy applications. -
Page 5: Requirements
Lennox air handler units (with or without optional electric Discard drip shields from the foam pads on top of the unit. heat), MUST conform with the following National Fire Protection Association (NFPA) standards: Shields are used for downflow applications only. - Page 6 NOTE (−068 Model Only) Before operating the unit, 2. Remove the downflow rail then replace screws. remove access panels and the horizontal drip shield and 3. Seal around the exiting drain pipe, liquid line, and the corrugated padding between the blower and coil suction line to prevent humid air from infiltrating into assembly.
- Page 7 8. Reinstall horizontal drip shield screw in front coil end 11. (−068 Model Only) Install the horizontal shield on the seal. Drip shield should drain downward into horizontal front edge of the horizontal drain pan as shown in drain pan inside coil. figure 5. Page 7 CBX32MV SERIES...
- Page 8 Use the following procedures to configure the unit for downflow operations: Figure 6. Downflow Discharge Position CAUTION If electric heat section with circuit breakers (ECB29/ECB31) is applied to downflow CBX32MV unit, the circuit breakers must be rotated 180° to the position. ECB29/ECB31 installation instructions for more details.
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Page 9: Brazing Connections
8. For downflow installation on combustible flooring, an mixture − check the high and low additive base must be used as illustrated in figure 9 on pressures before unbrazing. page 9. See CBX32MV Engineering Handbook for downlfow combustible flooring base kits available for this air handler. WARNING 9. - Page 10 REMOVE RUBBER PLUG FROM BOTH LIQUID AND SUCTION LINES NOTE CBX32MV SERIES UNITS USE NITROGEN OR DRY AIR AS A HOLDING CHARGE. IF THERE IS NO PRESSURE WHEN THE RUBBER PLUGS ARE REMOVED, CHECK THE COIL FOR LEAKS BEFORE INSTALLING.
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Page 11: Installing The Condensate Drain
Some applications may required a field provided 7/8" to 1−1/8" adapter NOTE When installing refrigerant lines longer than 50 feet, see the Lennox Refrigerant Piping Design and Fabrication Guidelines, CORP. 9351−L9, or contact OVERFLOW MAIN DRAIN ON Lennox Technical Support Product Applications for... -
Page 12: Inspecting And Replacing Filters
FEET (25MM PER 3 GENERALLY, TWO INCHES (51MM). METERS) *LENNOX P−TRAP 49P66 REQUIRES A LARGER INSTALLATION SPACE THAN THE J−TRAP 91P90. Figure 13. Typical Main and Overflow Drain Installations See table 4 for replacement filter sizes. Inspecting and Replacing Filters Table 4. -
Page 13: Field Control Wiring
Standard C22.1, and local building codes. Refer to and from thermostat to indoor unit. following wiring diagrams. See unit nameplate for NOTE For proper voltages, select control wiring gauge minimum circuit ampacity and maximum over−current protection size. per the charts on page 19. Page 13 CBX32MV SERIES... - Page 14 Figure 14. CBX32MV Air Handler Unit Typical Wiring Diagram Page 14...
- Page 15 30 AMP CONTACT RATING AIR HANDLER CONTROL SECURING L−BRACKET MOUNTING PLATE SCREWS 9−PIN CONNECTOR CBX32MV AIR HANDLER CONTROL PART NO. 50W28 9−PIN CONNECTOR DETAIL B CONNECT WIRES TO DISCHARGE AIR SENSOR NOTE EVENHEAT MODE CANNOT BE ENABLED WITH TERMINAL ON AIR HANDLER CONTROL.
- Page 16 Air Handler or Furnace Control Heat Pump or Air Conditioner Control icomfort Toucht THERMOSTAT i− i− i− i− Outdoor sensor for outdoor temperature display (Optional). OUTDOOR AIR SENSOR Figure 16. Control (Field) Wiring Communicating System (icomfort Toucht Thermostat) Page 16...
- Page 17 L CONNECTION WIRED ON UNITS WITH LSOM. BROWN IMPORTANT USE CARE WHEN CUTTING LINKS TO PREVENT DAMAGE TO CONTROL. SEE FIGURE 21, YELLOW CBX32MV JUMP AND LINK GUIDE FOR FURTHER DETAILS. Y1−Y2 BLUE 2−STAGE CUT ON−BOARD LINK Y1−Y2 FOR TWO−STAGE AC COMPR R−O...
- Page 18 OUTDOOR IMPORTANT USE CARE WHEN CUTTING LINKS TO SENSOR PREVENT DAMAGE TO CONTROL. SEE FIGURE 21, (X2658) CBX32MV JUMP AND LINK GUIDE FOR FURTHER DETAILS. EDA UNIT CONNECTED ON UNIT WITH LSOM. RELAY RESISTOR KIT (CAT # 47W97) IS REQUIRED WHEN CONNECTING THE COMFORTSENSE 7000 (CATALOG# Y0349) WITH THE LSOM 2.
- Page 19 95 F (35 C) minimum, This is a two screw terminal for connection to a Lennox RSbus is limited to 1500 solid core. (Class II Rated X2658 outdoor temperature sensor. The Control takes no feet (457 meters).
- Page 20 CBX32MV / CBX40UHV 1−STG COMPRESSOR 2−STG COMPRESSOR JUMPER & LINK GUIDE DO NOT CUT CUT LINK COOLING MODE HEATING MODE BLOWER SPEED BLOWER SPEED (COOLING & HP MODE) (ELECTRIC HT MODE) A/C UNIT HEAT PUMP UNIT HIGH HIGH DO NOT CUT...
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Page 21: Air Handler Control Button, Display And Jumpers
45 SEC. DEMAND NOTE − Optional Discharge Air Temperature Sensor, Lennox Catalog # 88K38 is REQUIRED for EVENHEAT When cool demand is initiated, motor ramps up to operation and must be ordered separately. 100% and runs at 100% until demand is satisfied. - Page 22 Once demand is met, motor runs at 100% for 45 Motor runs at 82% for approximately 7.5 minutes seconds. and then ramp up to 100% (unless the demand has been satisfied) and motor runs at 100% until Motor ramps down to stop. demand is satisfied.
- Page 23 To clear error codes stored in memory, continue to HOLD push button while the three horizontal bars are displayed. Solid Release push button when solid c is displayed. Display will blink. Blinking Push button to confirm command to delete codes. Error codes are cleared. Page 23 CBX32MV SERIES...
- Page 24 Table 12. AHC Single Character Display Alert Codes (Communicating and Non−Communicating) Status of Air Handler Alert Code E 105 Device communications problem − No other devices on BUS (Communication system). E 114 No 60 hertz power (Check voltage and frequency) E 115 Low 24 volts (18 or less volts) −...
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Page 25: Target Cfm Tables
NOTES − The effect of static pressure, filter and electric heater resistance is included in the air volumes listed. First stage cooling air volume is 70% of COOL speed setting. Continuous blower speed is approximately 50% of COOL speed setting. Lennox Harmony IIIt Zone Control applications − minimum blower speed is 300 cfm (145 L/s) Page 25... - Page 26 Unit Operating Sequences This section details unit operating sequence for non−communicating systems. NOTE − For communicating systems, see the icomfort Toucht thermostat installation instruction. Table 13. CBX32MV with ComfortSenset 7000 Thermostat and Single−Stage Outdoor Unit Operating Sequence Operating Sequence System Demand...
- Page 27 Table 14. CBX32MV with ComfortSenset 7000 Thermostat and Two-Stage Outdoor Unit Operating Sequence Operating Sequence System Demand System Response Thermostat Demand Relative Humidity Handler System Compre Condition Status ssor Step (COOL) Comments No Call for Dehumidification Normal Operation Acceptable 24 VAC Compressor and indoor air −...
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Page 28: Configuring Unit
Configuring Unit This section identifies the requirements for configuring the air handler unit for unit size, heat mode selection and EvenHeat. Air Handler Control Checkout Power−up − Unit Size Code (Number or letter) displayed represents air handler model size and capacity. - Page 29 PUSH and HOLD button to allow AHC to display unit size code (letter or number) for each different air handler model for three seconds. LED displays correct Unit Size Code. Unit enters IDLE Mode. Figure 23. Configure Unit Size Codes Page 29 CBX32MV SERIES...
- Page 30 Configuring/Detecting Electric Heat Sections IMPORTANT All electric heat installations require the Air Handler Control (AHC) to be manually configured to detect number of heat sections. NOTE All field replacement AHC will require configuring/detecting electric heat sections. RECOMMEND USE FIGURE 21 AS A REFERENCE FOR SETTING JUMPER CONFIGURATIONS ON THE AIR HANDLER CONTROL.
- Page 31 Increase target discharge air temperature by 15Fº demand? Last room thermostat Heat Timer delays for 150 Timer delays for One Stage More than one stage seconds up− staging action 120 seconds Figure 25. EVENHEAT Operation (1 of 2) Page 31 CBX32MV SERIES...
- Page 32 Note 1 Activation delay EVENHEAT Operation 120 seconds if one heat stage is or deactivated 150 seconds if more than one stage is activated or deacti- vated. Start Timer Delay (Note 1) Activate Y2 Change in Heat demand from room thermostat? Delay Timer Delay Timer Finished or last...
- Page 33 USE CARE WHEN CUTTING LINKS TO PREVENT DAMAGE TO CONTROL. SEE FIGURE 21, AHC on−AHC link must be cut between R and O to allow heat pump operation. CBX32MV JUMP AND LINK GUIDE FOR FURTHER DETAILS. RECOMMEND USE FIGURE 21 AS A REFERENCE FOR SETTING JUMPER CONFIGURATIONS ON THE AIR HANDLER CONTROL.
- Page 34 IMPORTANT − Use care when cutting links to prevent damage to calls for first stage? control. See figure 21, CBX32MV jump and link guide for further details. Air Handler Control (AHC) receives inputs on Y1 terminal Y1 terminal on AHC is configured as input and passes signal from room thermostat to outdoor unit.
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Page 35: Error Code Recall Mode
Error Code Mode and go into mode without deleting error code history. NOTE Once the error code history is deleted, it cannot be recovered. Page 35 CBX32MV SERIES... -
Page 36: Indoor Blower Test
Indoor Blower Test Indoor Blower Test Mode AHC in Idle Mode (No heating cooling or indoor fan operation) To indoor blower test mode, push and hold button next to single character LED display until Turn room thermostat to (Solid bar), then release button. Push and hold button until the solid A symbol is displayed on the (Solid bar) starts blinking . -
Page 37: Operation
(e.g., pet sequencer. completed circuit will energize urine, cottonwood seeds, fertilizers, fluids that may contain supplemental electric heat (if applicable). Units with a high levels of corrosive chemicals such as salts) Page 37 CBX32MV SERIES... -
Page 38: Cabinet Insulation
Indoor Unit taped with a similar foil−faced tape. 1. Clean or change filters. 2. Lennox blower motors prelubricated permanently sealed. No more lubrication is needed. 3. Adjust blower speed for cooling. Measure the pressure drop over the coil to determine the correct blower CFM. - Page 39 NOTE If you are unsure about the filter required for your CAUTION system, call your Lennox dealer for assistance. 3. Reusable Filter Many indoor units are equipped Physical contact with metal edges and corners while with reusable foam filters. Clean foam filters with a applying excessive force or rapid motion can result in mild soap and water solution;...