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Lennox International Inc. AIR HANDLERS - page 1
09/06 505,047M *2P0906* *P505047M* Page 1 E 2006 Lennox Industries Inc. Dallas, T exas, USA RET AIN THESE INSTRUCTIONS FOR FUTURE REFERENCE W ARNING Due to higher operating pressures, CBWMV units must not be applied to steam boiler systems. CAUTION Unit is designed to be used with non−potable boiler systems only . CAUTION Physical contact with me ...
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Lennox International Inc. AIR HANDLERS - page 2
Page 2 505047 09/06 CBWMV Unit Dimensions − inches (mm) *Bottom Return Air Opening *Bottom Return Air Opening ELECTRICAL INLET (Either Side) SUPPL Y AIR OPENING AIR FLOW FRONT VIEW SIDE VIEW TOP VIEW A B 9/16 (14) C 3/4 (19) 3/4 (19) 28−1/2 (724) 19−7/16 (494) 23−1/2 (597) 4−1/4 (108) 40 (1016) 4 (102) 1−15/16 (49) 23 (584) 14 (356) 9/1 ...
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Lennox International Inc. AIR HANDLERS - page 3
Page 3 CBWMV SERIES General These instructions are intended as a general guide and do not supersede local codes in any way . Consult authorities having jurisdiction before inst allation. Only qualified ser- vice technicians or installers may install and service this unit. CBWMV Unit Part s Arrangement CBWMV Unit HOT W A TER COPPER TUBE COIL CBWMV C ...
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Lennox International Inc. AIR HANDLERS - page 4
Page 4 505047 09/06 Requirements W ARNING Improper installation, adjustment, alteration, ser- vice or maintenance can cause personal injury , loss of life, or damage to property . Installation and service must be performed by a qualified inst aller or service agency . Installation of Lennox CBWMV unit must conform with lo - cal building codes. Refe ...
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Lennox International Inc. AIR HANDLERS - page 5
Page 5 CBWMV SERIES tions with add−on cooling coils require field−fabricated tran- sitions that provide at least 6 inches of clearance for the CBWMV unit’s inlet/outlet water lines. See figure 2 for ex- amples. AIR FLOW AIR FLOW Figure 2 UPFLOW RIGHT HAND DISCHARGE* LEFT HAND DISCHARGE* DOWNFLOW CBWMV Multi−Positional Unit DOWNFLOW BASE * C ...
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Lennox International Inc. AIR HANDLERS - page 6
Page 6 505047 09/06 Return Air Opening Guidelines NOTE − Do not bring in air from the back of the unit. Return air can be brought in from the sides or bottom only . Bottom Return If the air handler is inst alled on a platform with bottom re- turn, make an airtight seal between the bottom of the air handler and the plat form to ensure that the air ...
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Lennox International Inc. AIR HANDLERS - page 7
Page 7 CBWMV SERIES Removing the Bottom Panel (bottom return or return air base configurations) Remove the two screws that secure the bottom cap to the air handler . Pivot the bottom cap down to release the bottom panel. Once the bottom p anel has been removed, reinstall the bottom cap. See fig- ure 5. Removing the Bottom Panel Figure 5 SCREW BO ...
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Lennox International Inc. AIR HANDLERS - page 8
Page 8 505047 09/06 Filter Assembly & Filters This unit is not equipped with a filter or rack. A field−pro- vided high−velocity filter is required for the unit to operate properly . T able 2 list s recommended filter sizes. A filter must be in place any time the unit is operating. T able 2 Recommended Filter Sizes Air Handler Filter Size Ai ...
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Lennox International Inc. AIR HANDLERS - page 9
Page 9 CBWMV SERIES Electrostatic Discharge (ESD) - Precautions And Procedures CAUTION Elect rostatic d ischarg e c an affect e lect roni c com- ponent s. T ak e p r ecautio ns d u rin g a ir h an dler i n st al- lati on a nd s er vic e to pr otec t t he a ir ha ndler ’s e lec - tron ic c o ntrol s. P recaut ion s w i ll help t o a voi d con- tr ...
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Lennox International Inc. AIR HANDLERS - page 10
Page 10 505047 09/06 Indoor Blower Speeds 1. When the thermost at is set to F AN ON," the indoor blower will run continuously at approximately 38% of the second−st age cooling speed when there is no cool- ing or heating demand. 2. When the CBWMV is in the heating mode, the indoor blower will run on the heating speed designated by the posi ...
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Lennox International Inc. AIR HANDLERS - page 11
Page 1 1 CBWMV SERIES Figure 12 T ypical CBWMV Wiring Diagram ...
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Lennox International Inc. AIR HANDLERS - page 12
Page 12 505047 09/06 Freezestat Operation IMPORT ANT Use of the freezest at feature is required in all instal- lations using CBWMV unit s. Th e CBWMV unit is equipped with a field-wired freezestat. The freezestat protect s the CBWMV system from freezing temperatures when the unit is installed in unconditioned areas. The factory-provided freezestat ...
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Lennox International Inc. AIR HANDLERS - page 13
Page 13 CBWMV SERIES Jumper Settings IMPORT ANT Before changing jumper setting, make sure the mo- tor has completely stopped. Any jumper setting change will not t ake place while the motor is run- ning. T able 4 shows the factory blower speed tap settings for CBWMV series unit s. These settings are for nominal ton- nage match−ups with the CBWMV . ...
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Lennox International Inc. AIR HANDLERS - page 14
Page 14 505047 09/06 T able 5 CBWMV−24B−040 Blower Performance 0 through 0.80 in. w.g. (0 Through 200 Pa) External S t atic Pressure Range ; Factory Settings: Heating S peed − 2, Cooling Speed − 1, S peed Adjust − NORM; Applications with single sided inlet s will reduce CFM by approximately 4%. ADJUST" BDC3 Jumper Speed Positions ...
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Lennox International Inc. AIR HANDLERS - page 15
Page 15 CBWMV SERIES T able 7 CBWMV−36C−090 Blower Performance 0 through 0.80 in. w.g. (0 Through 200 Pa) External S t atic Pressure Range ; Factory Settings: Heating S peed − 4, Cooling Speed − 3, S peed Adjust − NORM; Applications with single sided inlet s will reduce CFM by approximately 5%. ADJUST" BDC3 Jumpe r S pe ed Positio ...
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Lennox International Inc. AIR HANDLERS - page 16
Page 16 505047 09/06 T able 9 CBWMV−60C−120 Blower Performance 0 through 0.80 in. w.g. (0 Through 200 Pa) External S t atic Pressure Range ; Factory Settings: Heating S peed − 4, Cooling Speed − 4, S peed Adjust − NORM; Applications with single sided inlet s will reduce CFM by approximately 5%. ADJUST" BDC3 Jumpe r S pe ed Positio ...
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Lennox International Inc. AIR HANDLERS - page 17
Page 17 CBWMV SERIES System Adjustments Timed−ON and Timed−OFF Delays The 45−second timed−ON delay and the 30−second timed− OFF delay for heating (time that the blower operates after the heat demand has been satisfied) is not adjustable. Blower Speeds Select the blower speed by moving the pins on the variable speed control board. See fi ...
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Lennox International Inc. AIR HANDLERS - page 18
Page 18 505047 09/06 W ARNING W ARNING T O SER VICE PERSONS! Electric shock hazard. When electrical power to the internal control box component s must be available for troubleshooting, a common practice is to construct a by−pass" of the door interlock switch. When such a by−p ass is in place, a potential shock hazard is present which ca ...
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Lennox International Inc. AIR HANDLERS - page 19
Page 19 CBWMV SERIES W ARNING W ARNING T O SER VICE PERSONS! Electric shock hazard. When electrical power to the internal control box component s must be available for troubleshooting, a common practice is to construct a by−pass" of the door interlock switch. When such a by−p ass is in place, a potential shock hazard is present which ca ...
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Lennox International Inc. AIR HANDLERS - page 20
Page 20 505047 09/06 W ARNING W ARNING T O SER VICE PERSONS! Electric shock hazard. When electrical power to the internal control box component s must be available for troubleshooting, a common practice is to construct a by−pass" of the door interlock switch. When such a by−p ass is in place, a potential shock hazard is present which ca ...
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