LENNOX Evaporator Coils Manual L0806276
User Manual: LENNOX LENNOX Evaporator Coils Manual LENNOX Evaporator Coils Owner's Manual, LENNOX Evaporator Coils installation guides
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LENNOX INSTALLATION INSTRUCTIONS (c)2001 Lennox Industries Inc. Dallas, Texas CR26 Series Coils EVAPORATOR 504,361M 4/2001 COILS F]_puTeCh n ical blications Lithe U.S.A. Supersedes 503,379M RETAIN THESE INSTRUCTIONS FOR FUTURE CR26 downflow evaporator coils are designed for use with condensing units or heat pumps. Each coil is equipped with a compression fitting that provides convenient field installation of a refrigerant metering device. Either a refrigerant metering orifice (provided with some Lennox condensing units) or a thermal expansion valve (ordered separately) may be used in condensing unit applications. A check / expansion valve (ordered separately) is the only metering device approved for use in heat pump applications. Refer to the Lennox Engineering Handbook for proper use of these coils with Lennox furnaces, condensing units, heat pumps and line sets. These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities who have jurisdiction before installation. ACAUTION Package 1 of 1 contains the following: 1 - CR26 evaporator coil 2 - Adaptor rails for width adjustment only 1 - Bag assembly containing 1 - Suction line 90 ° street elbow 1 - Heat shield 1 - Liquid line stub (3/8" copper swedged) 4- Screws Check equipment for shipping damage. If you find any damage, immediately contact the last carrier. NOTE - If there is no pressure when the rubber plug is punctured, check the coil for leaks before installing the coil. The CR26 coils are shipped with a 10 psi dry air holding charge. Puncture the suction line rubber plug to release the charge. Remove the rubber plug. Loosen and remove the liquid line compression fitting. Remove and discard the plug which is in the distributor body. This releases the liquid line charge. NOTE - If there is no pressure when the plugs are removed, check the coil for leaks before installing it. An adaptor may be necessary to match the furnace supply opening with the inlet opening of the coil cabinet. Adaptor rails are supplied to provide width adjustment. See tables 5, 6, 7, 8, and 9 for the coil/furnace match-ups with or without transitions. AWARNING IMPORTANT 04/01 IIIHIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII USE 504,361M Page 1 IIIlllIIIIIIIIIIIIIIIIIIIIIIII 1- See table 1 for the dimensions of the floor opening required to accommodate the supply air opening and the plenum. If the unit is installed against a wall, the rear edge of the opening must be at least 1" (25 mm) from the wall. Cut an appropriately sized opening, Table Gas Furnace with Adaptor Rails and Coil gas furnace 1 Floor Opening Unit Side to Side Front to Rear CR26-18N, -30N, -36N 14-1/4" (3.6 m) 22-1/8" (5.6 m) CR26-36W, -48N, -60N 19-1/4" (4.9 m) 22-1/8" (5.6 m) CR26-48W 24-1/4" (6.2 m) 22-1/8" (5.6 m) CR26-60W 24-1/4" (6.2 m) 22-1/8" (5.6 m) 2- Lower the plenum through the floor opening. Align the flanges on the base of the unit with the matching flanges on the plenum, then lower the unit over the plenum. The coil cabinet must be level or sloped slightly toward the drain outlet and secured and sealed to the plenum, If the furnace and coil cabinet are the same size, skip to step four. adaptor rails Seal between adaptor and furnace. short flange (90 ° angle) the rail the rear of the coil cabinet. CR26 coil Adjusting the Coil Cabinet Width 3- Install the provided adaptor rails or filler pieces on the coil if necessary. Align the adaptor rails with the rear of the coil cabinet. Figure 2 illustrates how the furnace, coil, and adapter rails fit together, G40/50 Furnace Applications Use the provided rails to match the coil to the furnace. Refer to tables 5 through 9 for correct rail widths, Place the adaptor rail flat on the top of the coil cabinet. See figure 1, Bend the short flange up 90° at the perforation. Use the four provided screws to secure the rails to the coil cabinet, Adaptor Rail Installation Adaptor Rails Figure 2 Applications other than the G40/G50 If you use the CR26 coil with furnaces other than the G40/G50, and the furnace's width is smaller than the coil inlet opening, install filler pieces (field-provided). See figure 3, If the supply opening on the furnace is larger than the evaporator cabinet inlet opening, use an adaptor and furnace support (field-provided). See figure 4. Short Flange bend) FURNACE Align the adaptor rail with the rear of I J FILLER PIECES the coil cabinet. AIR FLOW CR26 Secure With Two Screws On Each Side PLENUM Figure 1 Figure 3 Page 2 FILLER PIECES Seal between filler pieces and furnace. FURNACE FURNACE SUPPORT ,_ADAPTOR! AIR FLOW 0 Seal between furnace supports J and furnace. CR26 PLENUM Figure 4 ACAUTION 4- Seal between the furnace cabinet and the coil cabinet to prevent air leaks. 5- As you lower the furnace onto the coil, align the flanges of the furnace and the the coil cabinet, 1 - Place a field-provided heat shield, such as a wet rag, against the piping plate and around the piping stubs, and sweat in the suction line. The heat shield must be in place to guard against heat damage to the paint, 2 - Slide the liquid line compression nut onto the provided liquid line stub. Insert the field-supplied liquid line into the liquid line stub for brazing. 3- Braze liquid line and coil connections. Use a silver alloy brazing rod (5 or 6 percent silver alloy for copperto-copper connections or 45 percent silver alloy for copper-to-brass or copper-to-steel connections), 4- Remove the heat shield after brazing and allow the connections to cool. 5 - Select the appropriate refrigerant metering device: • refrigerant flow control orifice or • expansion valve See the following sections: Refrigerant Flow Control Orifice and (Check/) Thermal Expansion Valve. Follow these sections and table 3 to install the appropriate metering device, See figure 5, Typical The refrigerant line sets should be sized according to the recommendations given in the condensing unit installation instructions, Refer to table 2 for sweat connection sizes, A field-provided adapter may be required to match line set connections. Table 2 Metering Device Installation orifice distributor tubes orifice housing valve OR orifice _ o-ring Refrigerant Line Connections Model No. CR26-18 Suction (Vapor) Line Sweat Size inches mm 5/8 15.9 Liquid Sweat inches 3/8 Line Size expansion valve (opt.) mm strainer 9.5 o-ring CR26-30,-36 3/4 19.0 3/8 9.5 CR26-48 7/8 19.0 3/8 9.5 CR26-60 1-1/8 28.6 3/8 9.5 liquid line stub suction line Sensing Bulb Figure 5 Page 3 Refrigerant Flow Control Orifice NOTE - A properly sized refrigerant flow control orifice may be provided with the outdoor unit. Refer to table 3 to ensure proper sizing of the refrigerant flow control orifice. An improperly sized flow control orifice can lead to diminished capacities and/or efficiencies, as well as potential damage to the unit. • 10ACB and HS29 condensing units are shipped with a matching metering orifice, • See table 3 for the correct metering device matchup. a - Ensure that the orifice is installed with the nylon seat pointing toward the distributor. b - Apply a small amount of refrigerant oil on the O-ring and insert the O-ring securely into the orifice housing, c - Screw the liquid line stub to the orifice housing, Tighten the compression fitting to 20 ft-lbs, d - The suction line service port has no core, Make sure that the service port cap is tightened securely. e - Insulate the refrigerant lines at the connections to prevent sweating, Continue with step 7. A IMPORTANT Page 4 (Check/) Thermal Expansion Valve NOTE - Refer to table 3 to ensure selection of proper (check/) expansion valve. a - Remove factory-installed metering orifice from orifice housing, b - Apply a small amount of refrigerant oil on the O-ring (shipped with the valve assembly) and place it securely in the orifice housing, c - Insert the expansion valve into the orifice housing and tighten the expansion valve compression fitting. d - Screw the liquid line compression nut (with the liquid line) on the threaded end of the expansion valve, Tighten the fitting to 20 ft.-Ibs. e - Install the expansion valve equalizer line on the suction line service port. NOTE - Make sure that the equalizer line fitting is tightened securely. f - Use the clamp provided with the valve assembly to secure the sensing bulb to the suction line. Continue with step 7. ,& IMPORTANT Table 3 CONDENSING UNIT / HEAT PUMP Table 3 (Continued) METERING THERMALEXR VALVE(TXV)/ CHECKEXR VALVE(CTXV) / CONDENSING UNIT/ HEAT PUMP DEVICE METERING DEVICE THERMAL EXR CATALOG NO. ORIFICE SIZE MODEL NO. TONNAGE O 42J35 .047 HP29-36 3 CTXV 56J 19 NA 1.5 O 42J39 .055 HP29-42 3.5 CTXV 56J20 NA 10ACB-24* 2 O 66J87 .062 HP29-48 4 CTXV 56J20 NA 10ACB-30* 10ACB-36* 2.5 3 O O 42J46 42J48 .068 .073 HP29-60 5 CTXV 56J20 NA 2 CTXV 56J 19 NA MODEL NO. TONNAGE 10ACB-12* 1 10ACB-18* ORIFICE (O) ORIFICE 10ACB-42* 3.5 O 42J52 .080 10ACB-48* 4 O 42J54 .084 10ACB-60* 5 TXV O 26K35 42J58 NA .092 12ACB-24 HS26-24 HS27-24 12ACB-30 HS26-30 HS27-30 TXV 2 2.5 12ACB-36 HS21-36 HS26-36 HS27-36 TXV 3 12ACB-42 HS26-42 HS27-42 HS29-42" TXV 3.5 HS21-48 HS26-48 4 HS21-60 HS26-60 5 HS26-18 1.5 HS29-12* 1 HS29-18* TXV 1.5 HS29-24" 2 HS29-30" 2.5 HS29-36" 3 HS29-42" 3.5 VALVE(TXV) CHECK EXR/ VALVE(CTXV) / 26K34 12HPB-24 HP26-24 HP27-24 HS32-24"* NA 26K34 NA 26K34 NA 26K35 NA TXV 26K35 NA TXV 26K35 NA TXV 26K34 NA TXV 26K49 NA O 42J35 .047 TXV 26K49 NA O 42J39 .055 TXV 26K49 NA O 66J87 .062 TXV 26K34 NA .067 O 42J45 TXV 26K34 NA O 42J48 .073 O 42J51 .078 HS29-48" 4 O 42J55 .086 HS29-60" 5 O 42J61 .098 CATALOG NO. ORIFICE SIZE (O) 2 TXV 37L51 NA HS32-30"* 2.5 TXV 37L51 NA HS32-36"* 3 TXV 37L51 NA HS32-42"* 3.5 TXV 39L72 NA HS32-48"* 4 TXV 39L72 NA HS32-60"* 5 TXV 39L72 NA 10HPB-18 1.5 CTXV 56J19 NA 10H PB-24 2 CTXV 56J 19 NA 10H PB-30 2.5 CTXV 56J 19 NA 10H PB-36 3 CTXV 56J 19 NA 10H PB-42 3.5 CTXV 56J20 NA 10HPB-48 4 CTXV 56J20 NA 10H PB-60 5 CTXV 56J20 NA 2 CTXV 56J 19 NA 2.5 CTXV 56J19 NA 3 CTXV 56J 19 NA 3.5 CTXV 56J20 NA 4 CTXV 56J20 NA 5 CTXV 56J20 NA 12HPB-24 HP26-24 HP27-24 12HPB-30 HP26-30 HP27-30 12HPB-36 HP26-36 HP27-36 12HPB-42 HP26-42 HP27-42 12HPB-48 HP26-48 HP27-48 12HPB-60 HP26-60 HP27-60 HP32-24"* 2 CTXV 49L24 NA HP32-30"* 2.5 CTXV 49L24 NA HP32-36"* 3 CTXV 49L24 NA 3.5 CTXV 49L25 NA HP29-18 HP29-24 1.5 2 CTXV CTXV 56J19 56J19 NA NA HP32-42"* HP32-48"* 4 CTXV 49L25 NA HP29-30 2.5 CTXV 56J19 NA HP32-60"* 5 CTXV 49L25 NA *Refrigerant metering **(Check)Expansion or heat pump. orifice shipped valve shipped with condensing with R410A unit. condensing unit Page 5 *Refrigerant metering orifice shipped with condensing unit. **(Check)Expansion valve shipped with R4 IOA condensing unit or heat pump. Table 4 Air Resistance Makedrainconnections fromthe3/4"(19mm)pipenipple onpanwitha 3/4"(19mm)drainpipe.Routedrainpipe downward toanopendrainorsump,Neverconnectdrain toa closedsystem. Air Volume CR26-18N It is veryimportant thatproperairvolumebeprovided over theevaporator coil.A draftgaugereading mustbetakento makesurestaticpressurefallswithintheproperrange. 1- Air testholesmustbefieldprovidedin therightfront accesspanel. CAUTION--Remove _ CR26-30N panel before drilling holes. Drill two 5/16" (8 mm) holes in locations shown in figure 6, Replace panel. CR26-36N t,_____IRTEST HOLE LOCATIONS t+ cfm L/s in. w.g. 500 235 .02 5 600 285 .05 12 CR26-36W +l t-1/2" --_ ACCESS PANEL 1-1/2' _T- NO TE--Remove panel before drilling test holes. CR26-48N Figure 6 2- Connect draft gauge. Zero end of draft gauge scale connects to air entering hole of coil. Insert gauge hoses into test holes about 5/16" (8 mm), Seal around holes with permagum, 3- Place the thermostat fan switch in continuous position with no heating or cooling demand. Turn on power to unit, and the furnace blower will begin operating, 4- Table 4 lists the range of air volumes and equivalent draft gauge readings for this unit, Observe draft gauge reading, If reading is above required air volume, decrease blower speed, Refer to furnace wiring diagram for changing direct drive blower speed, Do not exceed maximum air volume as indicated in diagram blower speed table, 5- On belt drive blowers, check amperage draw on motor by connecting an ammeter to one leg of the motor supply line, Compare this reading with the full load amps listed on the motor nameplate. The motor pulley must be adjusted not to exceed the motor nameplate full load amps for motor listed, 6- After required draft gauge readings are obtained, remove draft lines and seal air test holes, 7- Set the room thermostat to desired temperature, Page 6 CR26-48W CR26-60N CR26-60W Pa 800 380 .12 30 1000 470 .20 50 800 380 15 37 1000 470 25 62 1200 565 38 94 1400 660 51 127 800 380 17 42 1000 470 25 62 1200 565 34 85 1400 660 45 112 1600 755 55 137 800 380 09 22 1000 470 15 37 1200 565 21 52 1400 660 28 70 1600 755 38 94 1200 565 18 45 1400 660 22 55 1600 755 ,28 70 1800 850 33 82 2000 945 40 100 1200 565 14 35 1400 660 18 45 1600 755 23 57 1800 850 29 72 2000 945 35 87 1400 660 20 50 1600 755 26 65 1800 850 32 80 2000 945 39 97 2200 1040 46 115 2400 1135 55 137 1400 660 14 35 1600 755 17 42 1800 850 22 55 2000 945 27 67 2200 1040 32 80 2400 1135 37 92 2600 1225 43 107 RIGHT FRONT _ Total Resistance Mode! No. Table 5 Coil Model Furnace Model CR2618N-F CR2630N-2N *CR2636N-F CR2636W-F *CR2648N-F CR2648W-F *CR2660N-F CR2660W-F G40/50DF-24A-045 G40/50DF-36A-070 G40/50DF-36B-090 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiili_liilllliiiiliiiillliiillli_iiliiiliiilii!!liiiilliiiiliiillilliiiii!!_iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiil_!_ii iii:!il ¸i¸ill ¸ii!iiiiiiii!iiiiiiiiiiiiiiiiii!i!!iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiill ¸i!i!iiiiiiiiiiiiill G40/50DF-48C-090 G40/50DF-48C-110 G40/50DF-60D-135 Coil matches furnace size and air volume. Coil matches air volume. Coil does not match the furnace size and requires a field-fabricated The coil does not match the furnace 3 - 3/16" adaptor transition. size. rail supplied with the coil. iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii;iii i: 2 - 3/16" adaptor rail supplied with the coil. NOTE - ff the application requires more air than a narrow (N) coil allows, use a wide (W) coil in the next column, ff wide coils are used instead of narrow coils, a field-fabricated transition is necessary. Use the furnace adaptor rails provided with the wide coils. Table 6 Coil Model Furnace Model CR2618N-F CR2630N-2N CR2636N-F AM30Q2/3-70 CR26- I CR26- 36W-F t 48N-F CR2648W-F CR2660N-F CR2660W-F *CR2660N-F CR2660W-F AM30Q3/4-70 AM30Q3/4-90 AM30Q3/4-105 AM30Q4/5-90 AM30Q4/5-120 I Coil matches air handler size and air volume. Coil matches transition. air volume. Coil does not match the air handler size and requires a field-fabricated The coil does not match the air handler size. Table 7 Coil Model Furnace Model CR2618N-F CR2630N-2N *CR2636N-F GHR26Q3-75 CR26- I *CR26- 36W-F t48N-F t CR26- 48W-F GHR26Q3/4-100 GHR26Q4t5-100 GHR26Q4t5-120 I Coil matches furnace size and air volume. Coil matches air volume. Coil does not match the furnace size and requires a field-fabricated The coil does not match the furnace transition. size. NOTE - ff the application requires more air than a narrow (N) coil allows, use a wide (W) ceil in the next column, ff wide coils are used instead of narrow coils, a field-fabricated transition is necessary. Use the furnace adaptor rails provided with the wide coils. Page 7 Table 8 Coil Furnace Model CR2618N-F CR2630N-2N *CR2636N-F CR2636W-F Model *CR2648N-F CR2648W-F *CR2660N-F CR2660W-F 2-60 3-60 G24M G24MX 80MGF 80MGFX 2-75 3-75 4-75 3/4-100 4/5-100 3/4-120 4t5-120 4t5-140 Coil matches furnace size and air volume. Coil matches air volume. Coil does not match the furnace size and requires a field-fabricated The coil does not match the furnace 3 - 3/16" adaptor transition. size. rail supplied with the coil. iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiil_ 2 - 3/16" adaptor rail supplied with the coil. NOTE - ff the application requires more air than a narrow (N) coil allows, use a wide (W) coil in the next column, ff wide coils are used instead of narrow coils, a field-fabricated transition is necessa_ Use the furnace adaptor rails provided with the wide coils. Table 9 Coil Model Furnace Model CR2618N-F CR2630N-2N CR2648W-F CR2660N-F OHR23-Q3-150/120 OHR23-Q5-140/154 Coil matches furnace size and air volume. Coil matches air volume. Coil does not match the furnace size and requires a field-fabricated The coil does not match the furnace size. Page 8 transition. CR2660W-F
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