LENNOX Evaporator Coils Manual L0806272
User Manual: LENNOX LENNOX Evaporator Coils Manual LENNOX Evaporator Coils Owner's Manual, LENNOX Evaporator Coils installation guides
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INSTALLATION INSTRUCTIONS LEMV ,1,_,2008Lennox Industries Inc. Dallas, Texas, USA J J CH23 Series Coils HORIZONTAL 503,486M 04/08 Supersedes d) EVAPORATOR COILS _pu Technical blications 03/00 I CH23 Series Coil ............................... General ....................................... CH23 Coil Dimensions .......................... Shipping & Packing List ......................... Installation .................................... CH23 Refrigeration Systems ..................... Refrigerant Line Connections .................... Condensate Drain Connections .................. Evaporator Coil Air Pressure Drop ................ Clean-Up ...................................... / A IMPORTANT RETAIN THESE INSTRUCTIONS FOR FUTURE USE The Lennox CH23 series horizontal coils are designed for installation with a horizontal furnace and a matched remote outdoor unit. These units are for indoor installation only. Refer to the Lennox engineering handbook for match-up information. WARNING These instructions are intended as a general guide and do not supersede local or national codes in any way. Authorities having jurisdiction should be consulted before installation. Check contents for shipping damage. If any damage is found, contact the last carrier immediately. WARNING Page 1 1 1 2 2 2 3 3 4 4 5 3/4 3/4 , (19) IP 2-1/4 (57) 4 (102) SUCTION LINE 't LIQUID LINE 12 (305) 1-1/8 (29) 23 E (584) _ iiiiiiiiiiiii_i iiiiiiiiiiiii_i iiiiiiiiiiiii_i iiiiiiiiiiiii_i iiiiiiiiiiiii_i iiiiiiiiiiiii_i iiiiiiiiiiiii_i iiiiiiiiiiiii_i iiiiiiiiiiiii_i iiiiiiiiiiiii_i iiiiiiiiiiiii_i iiiiiiiiiiiii_i iiiiiiiiiiiii_i iiiiiiiiiiiii_i HHHHHH_ 3/4 (19) (89)_D3"1/2 iiii 4-1_ _2.1/2 CONDENSATE DRAINS (102) rq(64) FRONT VIEW END VIEW A Model No. B in. mm in. mm CH23-21 CH23-31 27 31 686 787 22-3/4 26-3/4 578 679 CH23-41 31 787 26-3/4 679 CH23-51 35 889 30-3/4 781 CH23-65 41 1041 36-3/4 933 CH23-68 47 1194 42-3/4 1086 Package 1 of 1 contains the following: 1- Coil cabinet assembly 1- Bag assembly containing the following: 1-Suction line elbow with equalizer port 1-90 <_liquid line stub 1-O-ring 1-Heat shield Remove the two shipping screws from the coil flange. The coil can't be removed from the case if the screws are present 1-3/8 inch x 5/16 inch reducer coupling (-21, -31 only) 1-7/8 inch x 5/8 inch reducer bushing (-21, -31 only) FIGURE 1 1-7/8 inch x 3/4 inch reducer bushing (-41 only) Check equipment for shipping damage. If you find any damage, immediately contact the last carrier. 1- CH23 cabinet must be installed for horizontal air flow. NOTE - Coils are designed for air flow from either direction. NOTE - To remove the coil from its casing after installation, remove the two shipping screws from the coil flange. See 2- Use field-fabricated transitions or adaptors (recommended 18 inches min. width) to connect CH23 and blower unit. figure 1. 3- Connect supply and return duct work. Page 2 4- CH23coilsarefactoryequipped witha fittingthatmayincorporateeitheran RFCIVmeteringdevice(orificeor bullet)or anexpansion valve. A90<_liquidlinestubandano-ring(provided inthebag assembly)are usedwith the sealnut to accommodate installationofeitherrefrigerantmeteringdevice. Alsoshipped withthecoilisa 90° suctionlineelbowwith a 1/4inchporttofacilitatetheuseofanexpansion valve. Thesizeof thesuctionlineelbowallowsthesuctionline pipingtoberoutedasdesiredandallowsroomtoinstallthe TXVbulbcloseto theportbeforeinsulating. ForRFCapplications, usetheorificeshippedwiththecondensingunitto ensurepropermatch-up. ForTXVapplications, referto the engineering handbook heatpumpor condensing unitdataforappropriate expansionvalvepartnumber. Liquidlineconnections onCH23unitsare3/8inchsweat connections. Suctionlineconnections on CH23unitsare 7/8inchsweatconnections. Applylinesetsandrefrigerant controldevicestocorrespond withmatchingremotecondensingunit. NOTE - CH23 evaporators use nitrogen or dry air as a holding charge. If there is no pressure when you remove the rubber plugs (step 2), check the coil or line set for leaks before installing. After installation, pull a vacuum on the line set and coil before releasing the outdoor unit charge into the system. RFC Applications 1- Remove plastic cap from distributor's orifice body. 2- Install one of the o-rings supplied to the distributor orifice body. See figure 2. 3- Install the refrigerant metering device (bullet) shipped with the condensing unit into the distributor orifice body and the liquid line seal nut section. 5- With heat shield in place, sweat in suction line. Suction line elbow service port has no core. Secure cap to port to prevent leakage. After procedure is completed, remove heat shield. 6- 2 - Remove and discard the rubber grommet and metal slug from the inside of the seal nut. 3 - Slide the liquid line stub (provided in the bag assembly) through the seal nut. 4 - Braze the liquid line to the liquid line stub/seal nut assembly. 5 - Apply a small amount of refrigerant oil to the O-ring (provided in the bag assembly) and install it on the liquid line orifice housing. Insert the stubbed end of the expansion valve into the liquid line orifice housing and tighten the expansion valve seal nut. See figure 3. 6 - Apply a small amount of refrigerant on the provided Teflon washer provided with the expansion valve kit. Install the washer on the threaded side of the expansion valve. Tighten the liquid line seal nut on the threads of the expansion valve. See figure 3. 7 - Place the provided heat shield over the piping plate and around the suction line connection. 8 - With the heat shield in place, sweat in suction-line elbow (provided) and the suction line. 9 - Attach the expansion valve sensing bulb on a a horizontal section of the suction line in the 2, 4, 8, or 10 o'clock position. The position of the sensing bulb is critical to ensure that the systems performs properly. Refer to figure 4. NOTE - Do not position the sensing bulb at the bottom of the suction line. The refrigerant/oil mixture will not allow a true temperature reading to be transferred to the sensing bulb. ORIFICE .----(USE O-RING ONE ONLY) "BULLET" ORIFICE 10 - Refer to the instructions that are provided with the condensing unit for leak testing, evacuating, and charging procedures. / SEAL NUT Refer to instructions provided with condensing unit for leak testing, evacuating and charging procedures. TXV Applications 1 - Loosen the liquid line seal nut at the point that the liquid line exits the coil. RFCIV INSTALLATION __ Place heat shield against the piping plate and around the suction line connection. Heat shield must be in place to guard against damage to the paint. SWEAT CONNECTION FIGURE 2 Page 3 DRAIN CONNECTIONS TYPICAL EXPANSION VALVE SUCTION EXPANSION VALVE (LB-85663A-E TEFLON O-RING (SUPPLIED WITH KIT) CONNECT LIQUID LINE SET HERE Shown) NNECT'°N TEFLON O-RING (SUPPLIED WITH KIT) DISTRIBUTOR ASSEMBLY IQUID o i NNECTION AUXILIARY DRAIN COIL N DRAIN STUB END OF VALVE FIGURE 5 Make drain connections from 3/4 inch pipe nipples using condensate lines of the same size, Pitch main drain down SENSING BULB (ATTACH TO SUCTION LINE) to an open drain or sump, Connect auxiliary drain to an exposed drain which can be readily noticed by owner, EQUALIZER CONNECTION (SECURE TO EQUALIZER PORT ON SUCTION LINE) 1- Drain piping should not be smaller than drain connections at drain pan, FIGURE 3 NOTE - After you have installed the valve, insulate the complete valve to prevent sweating. Bulb Location in the Suction Suction Line 2- Install trap in condensate line, Trap must be deep enough to offset difference in static pressure between drain pan and atmosphere. Generally 2 inches (51 mm) is satisfactory for medium static applications. Refer to figure 6, Lin_ Typical Condensate VENT MUST EXTEND ABOVE THE HEIGHT DRAIN PAN BY 2 INCHES (51 MM). Drain OF THE COIL" VENT 2 o'clock TRAP MUST BE DEEP ENOUGH 10 o'clock TO OFFSET MAXIMUM STATIC DIFFERENCE (GENERALLY, DRAIN PAN 2 INCHES [51MM]). 8 FIGURE 4 DRAIN LINE SHOULD SLOPE A MINIMUM 1 INCH PER 10 FEET (25 MM PER 3 M) CH23 coil has both main and auxiliary drains, Auxiliary drain removes condensation should main drain become plugged, Refer to figure 5 for auxiliary and main drain locations, NOTE - It is recommended a trap be provided in the main drain line, If a vent tee is required in the line, the trap should be between the unit outlet and the vent tee, TO APPROVED DRAIN FIGURE 6 3- Horizontal runs must be pitched down 1 inch per 10 feet (25 mm per 3 m) of drain line for proper condensate flow. 4- An open vent in the drain line may be required due to line length friction and static pressure. Page 4 5- Drainsshouldbeconstructed ina mannerthatwillfacilitatefuturecleaning. 6- Auxiliarydrainshouldruntoanareawherehomeownerwill noticeit draining.Theauxiliarydrainlinedoes notrequiredventingor a trap,Referto localcodes, 2- Connectdraftgaugewithzeroendofscaleatairenteringsideofcoil.Insert1/4inch(6 mm)oftestholesinsidecabinet,Sealaroundtesthosewithpermagum, 3- Table 1 lists a range of air volumes and equivalent draft gauge readings, as well as maximum operating CFM Observe draft gauge readings with blower access panel in place and blower operating, If reading is low, close adjustable pulley or wire direct drive blower to higher speed. If reading is high, open adjustable pulley or wire to a lower blower speed, Close blower access panel each time to eliminate false readings. 1- Drilltestholesin supplyductto readpressuredrop acrossCH23coil.Seefigure7. AIR TEST HOLE LOCATIONS BLOWER AIR TEST HOLES UNIT _ \ I I I -_ \ ClE NTcEcRNPNLEUc_ IBoI NG / \1 HORIZONTALLY 1- Insulate refrigerant connections at CH23 coil system suction line, Use a wrap-around insulation. 2- Set room thermostat at desired setting, 3- Pick up all shipping cartons, metal scraps, extra insulation and clean up the installation area, MANOMETER FIGURE 7 TABLE 1 DRAFT GAUGE READING (DRY EVAPORATOR) 400 CFM/190 L/S PER TON Air Volume Total Resistance Model No. cfm L/s in. w.g. Pa 600 285 .05 12 800 380 .07 17 CH23-31 1000 470 .04 10 CH23-41 1200 565 .09 22 CH23-51 1600 755 .17 42 1800 850 .20 50 2000 2200 945 1040 .24 .28 60 70 2400 1135 .32 80 CH23-21 CH23-65 CH23-68 Page 5
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