Lennox Signature Collection CBX32MV Installation Instructions Manual
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Lennox Signature Collection CBX32MV Installation Instructions Manual

Lennox Signature Collection CBX32MV Installation Instructions Manual

Multi−position air handler
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E2010 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 12.
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.
HORIZONTAL DRAIN PAN (SEE UPFLOW
C
APPLICATIONS ON PAGE 5 AND DOWNFLOW
APPLICATIONS ON PAGE 8 )
CONFIGURE/DETECTING ELECTRIC HEAT SECTION ON PAGE 24. SEE
E
PAGE 15 FOR JUMPER AND LINK GUIDE.
IMPORTANT: CONFIGURATION OF AIR HANDLER CONTROL BOARD MUST BE CHECKED BEFORE
START−UP TO ENSURE PROPER SYSTEM OPERATION. SEE JUMPER AND LINK GUIDE ON PAGE 15 AND
CONFIGURING UNIT SECTION STARTING ON PAGE 28.
03/10
*2P0310*
applications,
the Lennox
B
TOP CAP SHIPPING BRACKET (REPLACE
SCREWS IN TOP CAP AFTER REMOVAL).
D
REFRIGERANT LINE PLUGS (SEE BRAZING CONNECTION
ON PAGE 8] .
INSTALLATION
INSTRUCTIONS
Dave Lennox Signature
Collection CBX32MV Units
MULTI−POSITION AIR HANDLER
506274−01
03/10
Supersedes 02/10
RETAIN THESE INSTRUCTIONS FOR FUTURE

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Litho U.S.A.
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Summary of Contents for Lennox Signature Collection CBX32MV

  • 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. 03/10 in communicating applications. Supersedes 02/10 D In non−communicating...

  • Page 2: Cbx32Mv Upflow/Downflow Unit Dimensions

    CBX32MV 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...

  • Page 3: Cbx32Mv Horizontal Lh/Rh Unit Dimensions

    CBX32MV Horizontal Left− and Right−Hand Unit Dimensions Inches (mm) 5-3/8 FILTER (137) (51) LIQUID Horizontal Position LINE (Right-Hand Air SUCTION CONDENSATE LINE Discharge) DRAINS (2) (UPFLOW AND DOWNFLOW) COIL BLOWER 1-1/8 (29) CONDENSATE 4-3/8 DRAINS (2) (HORIZONTAL) (111) FOR DIMENSIONS A" THROUGH H", SEE CHART ON PAGE 2.

  • Page 4: Model Number Identification

    In addition, this unit has the enhance capability CAUTION of communicating with the icomfort Toucht thermostat and compatible outdoor units using the Lennox RSBus protocols. Physical contact with metal edges and corners while NOTE For downflow or horizontal left−hand air applying excessive force or rapid motion can result in discharge, certain field modifications are required.

  • 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 (−068 Model Only) Before operating the unit, NOTE 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 DETAIL C TOP CAP TOP CAP ROTATED TO SCREWS CORRECT POSITION CABINET SUPPORT 3/16" PLASTIC PLUG (REAR COIL END SEAL) 90º HORIZONTAL DRIP BEND SHIELD SCREW (FRONT COIL END SEAL) DRAIN PAN SHIPPING DRAIN PAN LOCATION REINSTALLED HERE INSTALL DRAIN PAN BETWEEN TAB AND EXTERIOR INNER WALL.

  • Page 8: Downflow Application

    NOTE For horizontal applications in high humidity WARNING areas, remove the downflow rail closest to the drain pan. To remove rail, remove screw from rail at back of unit and Danger of fire. Bleeding the refrigerant at cabinet support rail. Remove downflow rail then replace charge from only the high side may result screws.
  • Page 9 PLEASE READ IMPORTANT ISSUES CONCERNING BRAZING OPERATIONS ON PAGE 10 BEFORE PROCEEDING. USE A WET RAG TO PROTECT CTXV SENSING BULB WHEN BRAZING SUCTION LINE CONNECTIONS. NOTE REFER TO OUTDOOR UNIT INSTALLATION INSTRUCTIONS FOR REFRIGERANT PIPING SIZE REQUIREMENTS. NOTE − Use silver alloy brazing rods with five or six percent minimum silver alloy for copper−to−copper brazing, 45 percent alloy for copper−to−brass and copper−to−steel brazing.

  • Page 10: 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 11: 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 8. Typical Main and Overflow Drain Installations See Table 4 for replacement filter sizes. Inspecting and Replacing Filters Table 4.

  • Page 12: Field Control Wiring

    Seal the unit so that warm air is not allowed into the WARNING cabinet. Warm air introduces moisture, which results in water blow−off problems. This is especially important when Run 24V Class II wiring only through specified low volt- the unit is installed in an unconditioned area. age opening.
  • Page 13 Figure 9. CBX32MV Air Handler Unit Typical Wiring Diagram Page 13 CBX32MV SERIES...

  • Page 14: Pin Connector

    DETAIL A THE AIR HANDLER CONTROL (AHC) HAS TWO SCREW TERMINALS MARKED DISCHARGE AIR SENSOR. THE SENSOR NOTE − Due to varying duct designs IS REQUIRED FOR EVENHEAT and airflow conditions, relocation of the OPERATION, IS FIELD−MOUNTED AND MUST BE ORDERED SEPARATELY discharge sensor may be required to (CATALOG # 88K38).
  • Page 15 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 11. Control (Field) Wiring Communicating System (icomfort Toucht Thermostat) Page 15 CBX32MV SERIES...

  • Page 16: Electrostatic Discharge

    COMFORTSENSE CBX32MV T 7000 AIR HANDLER CONTROL COMES FROM FACTORY WITH A METAL JUMPERS BETWEEN W1 TO W2 AND W2 TO W3. SEE FIGURE 17 FOR HEAT SECTION CONFIGURATION. CONNECTED ON UNIT WITH LSOM. RESISTOR KIT (CAT # CONDITIONER 47W97) IS REQUIRED WHEN CONNECTING THE UNIT COMFORTSENSE 7000 (CATALOG# Y0349) WITH THE LSOM 2.
  • Page 17 OUTDOOR IMPORTANT USE CARE WHEN CUTTING LINKS TO SENSOR PREVENT DAMAGE TO CONTROL. SEE FIGURE 16, (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 18 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 19 CBX32MV / CBX40UHV 2−STG COMPRESSOR 1−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 CUT LINK SPEED SPEED...

  • Page 20: Air Handler Control Button, Display And Jumpers

    Error Code 130 as per Table 10, and the Air NOTE − Optional Discharge Air Temperature Sensor, Handler Control will automatically use the factory default Lennox Catalog # 88K38 is REQUIRED for EVENHEAT setting show in Figure 16) operation and must be ordered separately.
  • Page 21 Cooling Air Conditioner and Heat Pump: Delay Profile 3 7 1/2 MIN 100% CFM 82%CFM 100% CFM 100% CFM COOLING DEMAND COOLING 45 SEC. DEMAND When cool demand is initiated, motor ramps up to When cool demand is initiated, motor ramps up to Motor runs at 82% for approximately 7.5 minutes 100% and runs at 100% until demand is satisfied.
  • Page 22 FIELD TEST MODE (NOTE BOARD MUST BE IN IDLE MODE) Single Character LED Action Display Solid To enter Field Test Mode, push and hold button until solid appears, release button. Display will blink. Blinking Push and hold button until required symbol displays CONFIGURING ELECTRIC HEAT SECTIONS Release push button −...
  • Page 23 Table 11. Control 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) −...

  • Page 24: 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 24...
  • Page 25 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 12. CBX32MV with ComfortSenset 7000 Thermostat and Single−Stage Outdoor Unit Operating Sequence Operating Sequence System Demand System Response Thermostat Demand Relative Humidity...
  • Page 26 Table 13. 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 Status Condition ssor Step (COOL) Comments No Call for Dehumidification Normal Operation Acceptable 24 VAC Compressor and indoor air −...

  • Page 27: 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 28 Configuring Unit Size Codes (Model Number) Power−up Unit Size Code (number or letter) displayed represents unit size code (air handler model size and capacity). If three horizontal bars display, then Air Handler Control (AHC) does not recognize unit size code. AHC in IDLE mode (No heating, cooling or indoor fan operation) To enter Field Test Mode;...
  • Page 29 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 16 AS A REFERENCE FOR SETTING JUMPER CONFIGURATIONS ON THE AIR HANDLER CONTROL.
  • Page 30 EVENHEAT OPERATION INPUTS OUTPUTS Target Discharge Air Target Discharge Air Target Discharge Air Room Thermostat Demand Temperature Set at 85ºF Temperature Set at 100ºF Temperature Set at 115ºF/130ºF Heat Pump First + First Electric Heat Pump First Stage Heat Pump First Stage Heat Section (H1) Heat Pump First and Second Stage + First Electric Heat Section (H1) +...
  • Page 31 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 32 Heat Pump Operation (Heating and Cooling) Air Handler Control AHC) Indoor Blower Mode Speed and Profiles settings Set Cooling Mode Blower Speed jumper pin . (Low and high indoor blower CFM settings are identical for CUT ON−BOARD LINK Y1−Y2 cooling and heat pump) 2−STAGE Y1−Y2 FOR COMPR...

  • Page 33: Cooling Operation

    Cooling Operation Air Handler Control AHC) Indoor Blower Mode Speed and Profiles settings Set Cooling Mode Blower Speed jumper pin. Y1−Y2 Set Cooling Mode Blower Ramping jumper pin. CUT ON−BOARD LINK Y1−Y2 FOR 2−STAGE Set Blower Adjust Selection jumper pin. COMPR TWO−STAGE A/C Single or Two−Stage Unit...

  • Page 34: Error Code Recall Mode

    Error Code / Recall Mode AHC in Idle Mode (No heating cooling or indoor fan operation) To enter Error Code Mode, Turn room thermostat to OFF push and hold button next to single character LED display until solid E symbol appears, release button.

  • Page 35: Indoor Blower Test

    Indoor Blower Test Field Test Mode AHC in Idle Mode (No heating cooling or indoor fan operation) To enter Field Test Model, push and hold button next single character LED display until Turn room thermostat to (Solid bar), then release button. Push and hold button until the (Solid bar) starts solid A symbol is displayed on the...

  • Page 36: Operation

    second heat sequencer can be connected with the first The outdoor unit should come on immediately and the sequencer to W1 on the thermostat. They may also be indoor blower should start between 30 − 60 seconds connected to a second heating stage W2 on the thermostat later.

  • Page 37: 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 38: Outdoor Coil

    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;...

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