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INSTALLATION
INSTRUCTIONS
2006 Lennox Industries Inc.
Dallas, Texas, USA
CBWMV Series Units
AIR HANDLERS
505,047M
Litho U.S.A.
09/06
Supersedes 02/06
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Shipping & Packing List . . . . . . . . . . . . . . . . . . . . . . . . 1
CBWMV Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . 2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CBWMV Unit Parts A
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CBWMV Unit Dimensions − inches (mm) *NOTE − Single side inlet applications result in approximately 4 percent reduction of CFM on B−size units and approximately WATER INLET 5 percent reduction of CFM on C−size units. G SUPPLY AIR OPENING F WATER OUTLET E D 23-3/4 (603) OPTIONAL EXTERNAL SIDE RETURN 25 (635) AIR FILTER KIT (Either Side) − Not for TOP VIEW use with optional Return Air Base. 28−1/2 A (724) 9/16 19−7/16 9/16 B (14) ALTERNATE WATER (494) (14) INLET (far side) 1−1/4" (32) 10−1/2" 1−3/4
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General CBWMV Unit Parts Description These instructions are intended as a general guide and do Blower not supersede local codes in any way. Consult authorities The CBWMV is equipped with a variable speed motor that having jurisdiction before installation. Only qualified ser- provides separate cooling and heating CFM selections vice technicians or installers may install and service this and low continuous fan speeds. unit. Hot Water Coil The copper tube coil is equipped with aluminum fins which C
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Requirements Application The CBWMV unit is designed for use in non−potable water WARNING boiler systems. The water heating device must be ade- quate to provide enough heat according to the Engineering Improper installation, adjustment, alteration, ser- Handbook specifications. The water heating device must vice or maintenance can cause personal injury, loss provide a minimum of 6 gallons/minute for small units of life, or damage to property. (CBWMV−040, −070) and 9 gallons/minute for large units
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tions with add−on cooling coils require field−fabricated tran- Either suspend the unit from the roof rafters or floor joists sitions that provide at least 6 inches of clearance for the or mount on a platform. The CBWMV unit must be level CBWMV unit’s inlet/outlet water lines. See figure 2 for ex- and well supported. amples. NOTE − 1/2 hp and 1 hp blower motors are equipped with three flexible legs and one rigid leg. The rigid leg is CBWMV Multi−Positional Unit equipped with a shipping bolt and a
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Side Return Air With Transition And Filter Return Air Opening Guidelines NOTE − Do not bring in air from the back of the unit. Return 20" X 25" X 1" air can be brought in from the sides or bottom only. (508MM X 635MM X 25MM) CLEANABLE FILTER Bottom Return If the air handler is installed on a platform with bottom re- turn, make an airtight seal between the bottom of the air handler and the platform to ensure that the air handler op- RETURN AIR PLENUM erates properly and safely. Use aluminum tape
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Removing the Bottom Panel (bottom return or return through the bottom panel and the bottom flange of the cabinet. air base configurations)Remove the two screws that secure the bottom cap to the air handler. Pivot the bottom 2. Install one bolt and two nuts into each hole. Screw the cap down to release the bottom panel. Once the bottom first nut onto a bolt and then insert the bolt into a hole. A flat washer may be added between the nut and the panel has been removed, reinstall the bottom cap. S
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Refer to figure 12 for schematic wiring diagram and trouble- Filter Assembly & Filters shooting. This unit is not equipped with a filter or rack. A field−pro- Line Voltage (120V) vided high−velocity filter is required for the unit to operate Line voltage field supply conductors are terminated at the properly. Table 2 lists recommended filter sizes. A filter CBWMV unit. The unit is shipped with the line voltage con- must be in place any time the unit is operating. nections secured to the lower le
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National Electric Code (ANSI/NFPA No. 70) for the Electrostatic Discharge (ESD) - Precautions USA and current Canadian Electric Code part 1 (CSA And Procedures standard C22.1) for Canada. A green ground wire is provided in the field make−up box. CAUTION 5. Install the room thermostat according to the instruc- tions provided with the thermostat. See table 3 for field Electrostatic discharge can affect electronic com- wiring connections in varying applications. If the air ponents. Take precautions
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Indoor Blower Speeds Accessory Field Wiring (TB66 & TB67) 1. When the thermostat is set to FAN ON," the indoor blower will run continuously at approximately 38% of the second−stage cooling speed when there is no cool- Connect wires from accessories (e.g. powered air clean- ing or heating demand. ers, humidifiers) to terminal blocks TB66 and TB67 (see detail in figure 11). 2. When the CBWMV is in the heating mode, the indoor blower will run on the heating speed designated by the position of the
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Typical CBWMV Wiring Diagram ÉÉ É É Figure 12 Page 11 CBWMV SERIES
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Continuous Low Blower Option Freezestat Operation Refer to the blower speed chart located on the CBWMV unit wiring diagram for factory set cooling, heating and low IMPORTANT (continuous) blower speeds. Systems using a cooling ther- mostat subbase may operate continuous blower (factory- Use of the freezestat feature is required in all instal- set to operate at 38% of second-stage cooling speed) lations using CBWMV units. through the FAN−ON switch of the thermostat. For continu- The CBWMV unit is
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® For applications with the Harmony Zoning System, the Jumper Settings blower CFM volume is determined by the Harmony control center. The minimum blower speed is predetermined at IMPORTANT 400 CFM for −CBWMV−24B−040 and 36B−070 series units and 600 CFM for CBWMV−36C−090, 60C−100, and Before changing jumper setting, make sure the mo- 60C−120 series units. This speed is not adjustable. tor has completely stopped. Any jumper setting change will not take place while the motor is run- With the thermo
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Table 5 CBWMV−24B−040 Blower Performance 0 through 0.80 in. w.g. (0 Through 200 Pa) External Static Pressure Range ; Factory Settings: Heating Speed − 2, Cooling Speed − 1, Speed Adjust − NORM; Applications with single sided inlets will reduce CFM by approximately 4%. BDC3 Jumper Speed Positions ADJ ADJUST UST" " 1st Stage COOL" Speed J Jumper umper 1 2 3 4 Se Settin tting g cfm L/s cfm L/s cfm L/s cfm L/s + 610 290 770 365 930 440 1010 475 NORM 560 265 700 330 830 390 910 430 510 240 630
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Table 7 CBWMV−36C−090 Blower Performance 0 through 0.80 in. w.g. (0 Through 200 Pa) External Static Pressure Range ; Factory Settings: Heating Speed − 4, Cooling Speed − 3, Speed Adjust − NORM; Applications with single sided inlets will reduce CFM by approximately 5%. BDC3 Jumper Speed Positions ADJ ADJUST UST" " 1st Stage COOL" Speed Jumper Jumper 1 2 3 4 Se Settin tting g cfm L/s cfm L/s cfm L/s cfm L/s + 620 290 770 365 930 440 1010 475 NORM 570 270 700 330 830 390 910 430 520 245 630
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Table 9 CBWMV−60C−120 Blower Performance 0 through 0.80 in. w.g. (0 Through 200 Pa) External Static Pressure Range ; Factory Settings: Heating Speed − 4, Cooling Speed − 4, Speed Adjust − NORM; Applications with single sided inlets will reduce CFM by approximately 5%. BDC3 Jumper Speed Positions ADJ ADJUST UST" " 1st Stage COOL" Speed Jumper Jumper 1 2 3 4 Se Settin tting g cfm L/s cfm L/s cfm L/s cfm L/s + 1100 520 1250 590 1400 660 1560 735 NORM 990 465 1130 535 1260 595 1400 660 930 44
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2. Motors are pre−lubricated for extended life; no further System Adjustments lubrication is required. Freezestat Timed−ON and Timed−OFF Delays Verify that the freezestat functions. The 45−second timed−ON delay and the 30−second timed− OFF delay for heating (time that the blower operates after Service Filters the heat demand has been satisfied) is not adjustable. Filters must be cleaned or replaced when dirty to assure Blower Speeds proper unit operation. Select the blower speed by moving the pi
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WARNING WARNING TO SERVICE PERSONS! Electric shock hazard. When electrical power to the internal control box components must be available for troubleshooting, a common practice is to construct a by−pass" of the door interlock switch. When such a by−pass is in place, a potential shock hazard is present which can cause injury or death. Make sure any door interlock switch by−pass has been removed after troubleshooting is complete and BEFORE attempting any re- pairs to the control box components!
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WARNING WARNING TO SERVICE PERSONS! Electric shock hazard. When electrical power to the internal control box components must be available for troubleshooting, a common practice is to construct a by−pass" of the door interlock switch. When such a by−pass is in place, a potential shock hazard is present which can cause injury or death. Make sure any door interlock switch by−pass has been removed after troubleshooting is complete and BEFORE attempting any re- pairs to the control box components!
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WARNING WARNING TO SERVICE PERSONS! Electric shock hazard. When electrical power to the internal control box components must be available for troubleshooting, a common practice is to construct a by−pass" of the door interlock switch. When such a by−pass is in place, a potential shock hazard is present which can cause injury or death. Make sure any door interlock switch by−pass has been removed after troubleshooting is complete and BEFORE attempting any re- pairs to the control box components!
