LENNOX Air Handler (indoor Blower&evap) Manual L0805360
User Manual: LENNOX LENNOX Air Handler (indoor blower&evap) Manual LENNOX Air Handler (indoor blower&evap) Owner's Manual, LENNOX Air Handler (indoor blower&evap) installation guides
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INSTALLATION INSTRUCTIONS Lithe U.S.A. ,1,_2001 Dallas, Texas, USA These instructions are for CB17-95, CBH17-95, CB17-135, and CBH17-135. These instructions are intended as a general guide and do not supersede national or local codes in any way. Authorities having jurisdiction should be consulted before installation. CB17 & CBH17 Series Units BLOWER COIL UNITS 504,588M 2102 Supersedes CB17 blower coil units are designed for indoor vertical applications only. CBH17 blower coil units are designed for indoor horizontal applications only. Figure 1 shows a typical CB17 installation. Figure 2 shows a typical CBH17 installation. F[_) Technical JJ.LL Publications LithoUSA 504,439M General Information ............................. CB17 & CBH17 Series Units ..................... 1 1 Shipping & Packing List ......................... Blower Motor Drive Kit Selection .................. Installation ..................................... 1 2 2 Refrigerant Piping Connections ................... Wiring ........................................ Condensate Drain Connection .................... Duct Connections .............................. 3 4 4 4 Determining the Unit's Air Volume ................. 4 RETAIN THESE FOR FUTURE INSTRUCTIONS REFERENCE Blower Coil Unit Upflow Installation Figure 1 Package 1 of 2 contains the following: 1 - Assembled blower coil unit 1 - Plastic bag 1 - Distributor 1 - Condensate drain plug 1 - Blower drive belt 3 - Plastic grommets Blower Motor Drive Kit Package 2 of 2 contains the following: ,,,! 1 - Blower motor pulley Suspended Horizontal Installation Figure 2 IMPORTANT 1 - Blower motor 1 - Plastic bag containing blower motor mounting plate bolts and washers Check equipment for shipping damage. If you find any damage, immediately contact the last carrier. The blower motor drive kits listed on the unit nameplate and in table 1 are available for use with the CB17 and CBH17 units. 02/02 IIIHlllllllllllllllllllllllllllllllll 504,588M Page 1 IIIHllllllllllllllllllllHlll Table 1 5 - Adjust the motor mounting plate for proper belt tension, Ideal tension is the lowest tension at which the Blower Motor Drive Kits Nominal Motor Horsepower (kW) Model Number Maximum Usable Horsepower (kW) belt will not slip under peak load conditions, Overtightening the belt will shorten the life of the belt and bearings. RPM Range of All Available Drive Setups @ 1725 RPM Motor Speed 6 - Tighten the motor mounting plate bolts and recheck the belt for proper tension. DKB17-95/135 -1.5-2 1.5 (1.1) 1.725 (1.3) 600-820 DKB17-95/135 -1.5-3 1.5 (1.1) 1.725 (1.3) 600-820 *DKB17-95113 5-1.5-4 1.5 (1.1) 1.725 (1.3) 600-820 DKB 17-951135 -2-6 2 (1.5) 2.30 (1.7) 730-950 DKB 17-95/135 -2-7 2 (1.5) 2.30 (1.7) 730-950 *DKB17-95/13 5-2-8 2 (1.5) 2.30 (1.7) 730-950 The coil is divided into two sections, Each section has its own expansion valve. This configuration allows the use of a solenoid valve to control the flow of refrigerant into one coil section, Use this feature for capacity reduction or latent heat control. If a solenoid valve is used, install it directly ahead of the expansion valve of the coil section being controlled, Size the solenoid valve for approximately 50 percent of the total evaporator unit capacity. The sections share a common suction line, Connect the refrigerant piping from the bottom coil section to the first-stage condensing unit *Not available for U.L. listed units The expansion valves are sized specifically for the two stages, The CB17/CBH17-95 has a 6-ton first-stage expansion valve and a 4-ton second-stage valve. The CB17/CBH 17-135 has a 6-ton first-stage expansion valve and a 4-ton second-stage valve. ** RPM (revolutions per minute) 1 - Remove the blower access panel. Because of the two-section coil configuration, take care in 2 - Use the provided bolts and washers to install the blower motor on the motor mounting plate. See figure 3. piping the system. Refer to the condensing unit installation instructions to select the correct refrigerant lines for these coils, NOTE - CB17 and CBH17 series evaporator coils have a holding charge of nitrogen or dry air If there is no pressure when the rubber plugs are removed, check the coil or line set for leaks before installing, After installation, = liquid lines pull a vacuum on the line set before releasing the unit charge into the system, suction _/' line ]_ _/ :_ [_U_ ,\ 1 - Route piping through either side of the unit. _ 2 - Remove the knockouts from the piping mullion. Install the rubber grommets into the piping holes, / 3 - Remove the plugs from the suction line and from the two liquid line stubs, 4 - Use the provided distributor if only one liquid line is present from the condensing unit or heat pump. Ora'n blower motor moun, 5 - Note the location of the factory-installed expansion valve bulbs. Remove the expansion valve bulbs from the manifold so that the heat of the torch will not adjusting plate Figure 3 damage them during brazing. 6 - After connecting the refrigerant piping to the coil suction and liquid line stubs, replace the expansion valve bulbs, Ensure that each bulb is tightly clamped to the suction manifold. 3 - Make wiring connections per the wiring section and figure 4, NOTE - The expansion valve bulbs must be reinstalled in their original factory location, 4 - Install the blower motor pulley and belt, Page 2 7 - Insulatethesuctionlinewitha tubularslip-oninsulation 2 - Installtheplasticbushing, NOTE - Complete all refrigerant piping connections before installing the blower contactor kit. 4 - Secure the strain relief bushing to the blower motor wiring box, Electrical connections must comply with local codes. See figure 4 for the blower coil field wiring only. Electrical conduit knockouts are provided in the piping mullion, Remove the knockout, NOTE - If an electric heat section has been installed in 3 - Positiontheboxovertheplasticbushingandsecure theblowercontactor kit(LB-51207CB), the unit, the blower contactor kit is not required. The cabinet is equipped with knockouts for the wiring from the blower motor to the electric heat system. 24V S4 POWER A ECON ]rl G K36- [] I wl W2 ,A A [KEY iB3 [FI DESCRIPTION COMPONENT MOTOR-BLOWER FUSE-TRANSFORMER <5,-I iK36,-I iK43,-I [$42 [TI CONTACTOR-BLOWER RELAY-HEAT BLOWER RELAY-ECONO HEAT RELAY-OVERLOAD,BLO.MOTOR TRANSFORMER-CONTROL TI z_REFER TO UNIT RATING PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVERCURRENT PROTECTION SIZE USE COPPER z_FIELD 45VA CONDUCTORS ONLY PROVIDEO,24V TRANSFORMERMINIMUM REOUIREMENT z_REFER TO MOTOR SCHEMATIC FOR PROPER LEAD CONNECTIONS. I z_MAXIMUM LOAD NOT TO 4OVA AT 24V,CLASS 2 z_STANDARD Z_ EXCEED WIRING OPTIONAL WIRING WHEN K43 RELAY IS EMPLOYED 24V COMMON :TTsWIRING SINGLE PHASE _ :__LI m LL_ m LIJ BLOWER MOTOR Z_542 IS USED ON "M" UNITS & UNITS WITH _ --LINE _LINE D LU VOLTAGE HIGH DENOTES OPT IONAL COMPONENTS VOLTAGE INSTALLED AT FACTORY VOLTAGE TO BE INSTALLED .... ACCESSORIES CB/CBHU7 WITHOUT ELECTRIC HEAT $42Z_? _ Supersedes Form 532,210W SECTION A DIAGRAM WIRING No. | New Form No. 553,755W L[fho Figure 4 Page 3 U,S,A, Do not install the supply air plenum within 18 inches (457 mm) of the blower access panel, Theunitisequipped witha condensate drainoutletoneach side. 1- Installtheprovided drainpluginthecondensate outletthatwillnotbeused, 2 - Installcondensate pipingusingproperlysizedfieldprovided fittings, 3 _ Installa trapinthedrainlinewherethedrainexits theunit, 4 - Pitchthedrainlinedownward totheopendrainor sump, NOTE - Use a flexible duct to eliminate vibration, NOTE - The indoor coil must be dry and the air filters must be in place when the following measurements are taken. 1 - Run the blower without a cooling demand, 2 - Measure the static pressure external to the unit, NOTE - Never connect the condensate drain to a 3 - Measure the indoor blower motor's rpm, closed system, 4 - Refer to tables 2 and 3, Use the static pressure and rev/min* readings to determine the unit's air volume. 5 - Use plugged tees where possible to facilitate cleaning the drain lines. 5 - Adjust the unit's air volume at the blower motor pulley. Loosen the Allen screw, Turn the adjustable sheave clockwise to increase the air volume or counterclockwise to decrease the air volume. See If a return air plenum is not used. installation codes may limit installation to single-story structures only. figure 3. Table 2 CB17-95V Blower Performance with or without Electric Heat Static Pressure External to the Unit -- Inches Water Gauge (Pa) Air Volume 0.25 cfm (m3/s) RPM BHP 2000 and CBH17-95V 0.35 .... RPM 0.45 BHP RPM 0.55 BHP RPM 0.65 BHP RPM 0.75 BHP RPM 0.85 BHP RPM 1.10 BHP 1.35 RPM BHP RPM BHP 550 .35 590 .50 630 .55 650 .60 690 .70 720 .75 790 1.05 850 1.30 830 1.30 880 1.40 2500 560 .30 660 .55 630 .65 670 .75 700 .80 730 .90 760 1.00 *3000 625 .75 650 .85 690 .95 720 1.00 750 1.15 775 1.25 800 1.30 ........ 3500 685 1.05 715 1.15 740 1.30 770 1.35 800 1.50 825 1.60 840 1.65 ........ 4000 750 1.60 775 1.65 800 1.75 825 1.85 850 1.95 875 2.05 900 2.15 ........ NOTE -- Aft data is measured external to the unit with air filters in place. *3000 cfm (1.416 m3/s) minimum with electric heat. 4000 cfm (1.888 m3ls) @ .35 static pressure maximum with 1.5 horsepower (1.1 kW) motor. Table 3 CB17-135V and CBH17-135V Blower Performance with or without Electric Heat Static Pressure External to the Unit -- Inches Water Gauge (Pa) Air Volume 0.25 cfm (m3/s) RPM BHP RPM 3000 575 .60 610 .70 650 .80 680 3500 620 .80 650 .95 680 1.05 725 *4000 665 1.10 700 1.20 725 1.30 750 4500 715 1.40 740 1.55 775 1.70 5000 760 1.80 800 1.95 825 2.15 0.35 0.45 BHP RPM 0.55 BHP RPM 0.65 BHP 0.75 RPM BHP RPM BHP .90 725 1.05 750 1.20 1.15 750 1.25 790 1.40 1.40 790 1.55 820 1.70 810 1.80 840 1.95 870 2.10 850 2.30 .................... NOTE -- Aft data is measured external to the unit with air filters in place. *4000 cfm (1.888 m3/s) minimum with electric heat. 4500 cfm (2.124 m3/s) @ .45 static pressure maximum with 1.5 horsepower Page 4 (1.1 kW) motor. 0.85 RPM 1.10 1.35 BHP RPM BHP RPM 790 1.30 860 1.55 925 1.85 820 1.55 900 1.95 950 2.10 850 1.90 920 2.15 890 2.25 ........ .... BHP
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