LENNOX Air Handler (indoor Blower&evap) Manual L0805350
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 ,_:.2008 Lennox Industries Inc. Dallas, Texas, USA CB(X)26UH(-R) Series Units AIR HANDLERS 505,059M (65937170) 04108 Supersedes 09/07 n ical blications Litho U.S.A. _puTeCh Shipping and Packing List ...................... 1 Unit Dimensions 2 .............................. CB(X)26UH Series Units ....................... TXV RFC RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE X_ WARNING CAUTION Requirements 3 ................................. Installation Clearances 3 ......................... 4 Installation .................................... 4 Condensate Drain ............................. 7 Duct System and Filters ........................ 8 Connecting Refrigerant Lines ................... 9 Sealing the Unit ............................... 9 Electrical Connections 9 ......................... Airflow - Cooling Blower Speed .................. 12 Check-Out Procedures ......................... 15 Operation 15 .................................... Maintenance .................................. 16 Accessories .................................. 16 Cabinet Insulation ............................. RFC Charging Supplement 16 ..................... 17 _, IMPORTANT Package 1 of 1 contains the following: 1 - Assembled air handler unit for upflow or horizontal air discharge application (includes upflow and horizontal drain pans) A IMPORTANT 04/08 IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII NOTE - For downflow (0658731-75). application, order kit 12W61 Check equipment for shipping damage. If found, immediately report damage to the last carrier. Check the unit rating plate to confirm that delivered unit matches order. Page 1 505,059M (65937170) IIIIIIIIIIIIIIIIIIIIIIIIIIIIII B _-1_25) LINE VOLTAGE , t1" AIR FLOW ! _O!DG__dlIA_DIIE _Right' Left and Top_'_,_tO SUCTION FILTER ACCESS OPTIONAL DUCT ADAPTOR KIT (Kit allows direct connection of the ductwork to the return air opening of the air handier, not required if an 3/4 external filter is used.) "_-- (19) 2-1/2 (Opening) _ 2-1/2 (64) 1-1/2 FRONT VIEW CB(X)26UH Dimensions (Opening) 1-1/2 (38) (64) (38) SIDE VIEW (for Upflow and LH/RH -018, -024 Horizontal -030, -036 Air Discharge Applications) -037", -042, -048* -060 Dimension inches mm inches mm inches mm inches mm A 46-3/4 1187 51 1295 54 1372 60 1524 B 18-1/2 470 21-1/4 540 21-1/4 540 21-1/4 540 C 22 559 22 559 26 660 26 660 D 11 279 12-1/2 318 12 305 11-3/4 298 E 16 406 18-1/2 470 16-3/4 425 17 432 F 5-1/2 140 6 152 4 102 4 102 G 13-1/2 343 16 406 16 406 16 406 19 483 19 483 23 584 23 584 Supply Air H Depth 17 432 17 432 21 533 21 533 Opening Width 16-1/2 419 19-1/4 489 19-1/4 489 19-1/4 489 Return Air Depth 18-1/4 464 18-1/4 464 22-1/4 565 22-1/4 565 Opening Width 13-1/2 343 16-1/4 413 16-1/4 413 16-1/4 413 * -037 and -048 units not available in RFC model Page 2 505059M 04/08 I WARNING WARNING These instructions are intended as a general guide and do not supersede local or national codes in any way. Consult authorities having jurisdiction before installation. Compliance with all local, state, or national codes pertaining to this type of equipment should be determined prior to installation. Read this instruction manual, as well as the instructions supplied in separate equipment, before starting the installation. All CB(X)26UH air handlers are designed for indoor installation only. As shipped, the units are ready for installation in either upflow or horizontal left-hand air discharge applications. All units may be installed with optional field-installed electric heat and a matched remote outdoor unit. • IMPORTANT CBX26UH air handlers may be installed with a matched HFC-410A remote outdoor unit. These units are completely assembled, including installed check/expansion valve. • In addition to conforming to manufacturer's installation instructions and local municipal building codes, installation of Lennox air handler units (with or without optional electric heat), MUST conform with National Fire Protection Association (NFPA) standards: "Standard for Installation of Air Conditioning and Ventilation Systems" (NFPA No. 90A) and "Standard for Installation of Residence Type Warm Air Heating and Air Conditioning Systems" (NFPA No. 90B). a factory CB26UH air handlers may be installed with a matched HCFC-22 remote outdoor unit. These units are completely assembled, including a factory installed check/expansion valve. Table 1. Orifice (RFC) Part Number (Sizes - in.) HCFC-22 Model 018 O24 O3O NOTE 1 13ACD/ AC13 13HPD / HP13 HFC-410A NOTE 2 XC13 / XP13 100484-08 (0.057) 100484-11 (0.061) O36 100484-21 (0.072) 100484-23 (0.074) O42 100484-30 (0.082) Refer to orifice table in outdoor unit installation manual 037, 048 O6O 100484-44 (0.098) Note 1 - Orifice ships with Air Handler. Note 2 - Orifice ships with outdoor units. CB26UH-R (RFC) units may be installed with a matched remote outdoor unit. These units are equipped with an HCFC-22 refrigerant flow control device (see orifice table 1 ). Also, these units can be used with HFC-410A refrigerant provided the RFC shipped with the outdoor unit is installed in place of the RFC device shipped with the CB26UH-RFC unit. All models are designed for indoor installation only. The installation of the air handler, field wiring, duct system, etc. must conform to the requirements d the National Electrical Code, ANSI/NFPA No. 70 (latest edition) in the United States, and any state laws, and local ordinances (including plumbing or wastewater codes). Local authorities having jurisdiction should be consulted before installation is made. Such applicable regulations or requirements take precedence over the general instructions in this manual. Install the conditioned air plenum, ducts and air filters (not provided) in accordance with NFPA 90B Standard for the Installation of Warm Air Heating and Air-Conditioning Systems (latest edition). The air handler is shipped from the factory completely assembled. The unit is provided with flanges for the connection of the duct system. Do not remove the cabinet knockouts until it has been determined which knockouts will need to be removed for the installation. Page 3 CB(X)26UH SERIES Select the final air discharge position which best suits the site conditions. Consider required clearances, space, routing requirements for refrigerant line, condensate disposal, filters, duct system, wiring, and accessibility for service, Refer to the air handler rating plate on the air handler for specific information, WARNING If the free area is not known, assume a 25% free area for wood or a 75% free area for metal louvers or grilles. Using the louver dimensions and the 25% or 75% assumption, determine if the open area meets the minimum open area listed above, If a return air plenum is used, the return air grille should be immediately in front of the opening in the plenum to allow for the free flow of return air. When not installed in front of the opening, there must be adequate clearance around the air handler to allow for the free flow of return air, GENERAL INFORMATION AkWARNING NOTES During cooling operation, excessive sweating may occur if the air handler is installed in a very humid space. If installed in an unconditioned space, sealant should be applied around the electrical wires, refrigerant tubing, and condensate lines where they enter the cabinet. Electrical wires should be sealed on the inside where they exit the conduit opening. Sealant is required to prevent air leakage into, and condensate from forming inside of, the air handler, the control box, and on the electrical controls. This unit is approved for installation clearance to combustible material as stated on the unit rating plate. Accessibility and service clearances must take precedence over combustible material clearances. The air handler must be installed so that free access is allowed to the coil/filter compartment and blower/control compartment. CB(X)26UH units are factory-assembled and configured for installation in upfiow or horizontal left-hand air discharge applications, Each unit consists of a blower assembly, refrigerant coil, and controls, in an insulated galvanized steel factory finished enclosure, Knockouts are provided for electrical wiring entrance, For ease in installation, it is best to make any necessary coil configuration changes before setting air handler in place, If a filter is to be installed at the air handler, early models require a filter rack be formed using factory-supplied flanges, Lay the unit on its back and pry out the filter rack tabs as shown in figure 1, Repeat procedure on opposite side, Horizontal applications of the air handler must be installed sloped (approximately 5/8 inch) toward the drain pan openings to ensure proper condensate drainage. NON-DUCTED RETURN CLOSET INSTALLATION The air handler can be installed in a closet with a false bottom to form a return air plenum. It may also be installed with a return air plenum under the air handler, Louvers or return air grilles are field-supplied. Local codes may limit application of systems without a ducted return to single story buildings. When a CB(X)26UH unit is installed in a closet with a Iouvered return opening, the minimum open area for the louvers will be: • 320 square inches for -018 and -024 models; • 360 square inches for -030 and -036 models; • 450 square inches for -042 thru -060 models, Figure 1. Filter Rack Tabs (Pre April 2006) Later models are equipped with rails in which the filter slides, Two screws and a bracket must be removed to insert and remove the filter (see figure 2), Page 4 505059M 04_8 HORIZONTAL _ BRACKET _ A IMPORTANT SELF TAPPING SCREWS ATTACHING FOR RETURN AIR OPTIONAL _ # APPLICATIONS DUCT) RAILS NOTE When the unit is installed in horizontal applications, a secondary drain pan is recommended. Refer to local codes. Figure 2. Filter Rails (April 2006 and Later) UPFLOW APPLICATION 1. The air handler must be supported on the bottom only and set on solid floor or field-supplied support frame. Securely attach the air handler to the floor or support frame, NOTE - For applications where return air ducting is to be connected to the bottom of the coil blower, Lennox offers a duct adapter kit which mounts on the filter door side of the end of the unit (shown in figure 2). This provides a metal edge for attaching the return air duct. One duct adapter and two self-tapping screws are needed for each installation. Packages of 10 adapters/20 screws are available: 0658731-85 (Catalog No. X8103) for the -018/-024 size units; 0658731-86 (Catalog No. X8104) for the -030 to -060 size units. 2. If installing a unit in an upfiow application, remove the horizontal drain pan, IMPORTANT - The horizontal drain pan is not required in upflow air discharge installations; its removal provides the best efficiency and air flow. 3. Place the unit in the desired location and level it. Connect return and supply air plenums as required using sheet metal screws. NOTE - This unit may be installed in left-hand or right-hand air discharge horizontal appfications. Adequate support must be provided to ensure cabinet integrity. Ensure that there is adequate room to remove service and access panels if installing in the horizontal position. 4. Install units that have no return air plenum on a stand that is at least 14" from the floor. This will allow proper air return. 1. Determine whether left-hand or right-hand air discharge is required. If right-hand is required, perform Right-Hand Discharge Modification on page 6, 2. Determine knockouts connections, T HORIZONTAL DRAIN PAN\ IMPORTANT!\ Remove pan for\ best efficiency\ , f UPFLOW DRAIN PAN _ q for drain line With access door removed, knock out drain line opening for installing drain lines. 4. Set unit so that it is sloped toward the drain pan end of the unit (see figure 10 on page 7). HORIZONTAL DRAIN CONNECTIONS and air flow. X required 5. The horizontal configuration is shown in figure 6. (Both sides; Not used) 6. If the unit is suspended, the entire length of the cabinet must be supported. If you use a chain or strap, use a piece of angle iron or sheet metal attached to the unit (either above or below) to support the length of the cabinet. Use securing screws no longer than 1/2 inch to avoid damaging the coil or filter. See figure 7. Use sheet metal screws to connect the return and supply air plenums as required. / UPFLOW DRAIN CONNECTIONS_ (Both sides; use _ one side or other) Figure 3. Upflow Configuration Page 5 CB(X)26UH SERIES j REMOVE DRAIN PANTHEN... FROM HERE REINSTALL PAN HERE __ J REMOVE 2 SCREWS, BLOWOFF PREVENTION BRACKET(S), AND DRIP SHIELD FROM HERE THEN... ROTATE SHIELD AND BRACKET AND REINSTALL NOTE - EXPANSION VALVE SHOWN ON COIL IS NOT ON CB26UH-R (RFC) EQUIPPED UNITS. REMOVE COIL SUPPORT BRACKET FROM HERE THEN... BRACKET SHOWN AS SHIPPED BRACKET HERE BRACKET SHOWN FOR RIGHT HAND DISCHARGE Figure 4. Field Modification for Right-Hand Discharge ANGLE IRON OR AIR _ _1 FLOW iHEET t/2 in. Screws max. I_ I_ METAL I I Electrical Inlet Clear- 1_ ance 4 in. (102 mm) K.OCKO UI II RIGHT-HAND DRAINS Figure 5. Right-Hand Discharge Configuration II @ / _ AIR I.... f J F.ow !.j K OCKOO _=. FRONT VIEW END VIEW For horizontal right-hand air discharge, the following field modifications are required. 1. Remove and set aside blower and coil access covers. 2. Remove the coil support bracket (detail A, figure 4). 3. Remove coil assembly, bottom drain pan and horizontal drain pan as one assembly from the air handler. Page 6 04/08 41 Figure 7. Suspending Horizontal Unit RIGHT-HAND AIR DISCHARGE MODIFICATION Figure 6. Left-Hand Discharge Configuration 505059M , 4, Removetwo screws,blowoffpreventionbracket (whereused;seetable2),andhorizontal dripshield. Rotatethebrackets180°andreinstallusingthesame screws, The coil has a fixed orifice in the liquid line (see figure 9), Remove the rubber plug from the vapor line of the coil. I1 0 \\ 5, Movethehorizontal drainpantotheoppositesideof thecoil.Besuredrainholestowardthebackoftheunit areplugged(seefigure8).Removetheplugsfromthe frontdrainpanports. 6, Re-installmodifiedcoil/drainpan assemblyin air handlerinthesameorientation asbefore. 7, Installthecoilsupportbracketontheoppositesideof theair handler(detailB,figure4), Table2. Blowoffpreventionbracket Model Front Rear -018 None None -024 None None -030 Yes Yes -036 Yes Yes -037 None None -042 None None -048" Yes None -060 Yes None O-RING FIXED ORIFICE STRAINER // DISTRIBUTOR LIQUID LINE STUB Figure 9. Metering Device Installation NOTE - See the RFC Charging Supplement on Page 17 for charging information and unit match-up. IMPORTANT AkIMPORTANT * -048 model supported in TXV units only. i The air handler is provided with ¾" NPT condensate drain connections. PLUGGED END SLOPING THE DRAIN Make sure the unit is sloped (similar to the slope shown in figure 10) so that the drain pan will empty completely without water standing in the pan. PEN END FOR CONDENSATION DRAIN THIS CORNER SHOULD BE 5/8" (+/- 1/8") HIGHER THAN Figure 8. Right-Hand Drain Plug Location THIS CORNER SHOULD BE 5/8" (+/- 1/8") HIGHER THAN DRAIN CORNER REFRIGERANT METERING DEVICE NOTE - See the outdoor unit installation instructions and the Lennox Engineering Handbook for approved fixed orifice match-ups and appfication information. CB26UH-R units are equipped with a factory-installed refrigerant flow control (RFC) device (see table 1 on Page 3). A IMPORTANT DRAIN CORNER Figure 10. Sloping the Drain INSTALL CONDENSATE DRAIN 1. Remove the appropriate drain knockouts. If necessary, remove the indoor coil assembly from the cabinet, Page 7 CB(X)26UH SERIES 2. Connect primary drain line connection to the primary drain pan connection, The primary drain connection is flush with the bottom of the inside of the pan, Secondary connection is raised above the bottom of the inside of the pan. NOTE - When making drain fitting connections to the drain pan, hand tighten the fitting and use a sealant, Over-tightening the fittings can split connections on the drain pan, 3. If the auxiliary drain line is to be used, remove the plug and route the drain line so that water draining from the outlet will be easily noticed by the homeowner. The auxiliary drain line does not required venting or a trap. Refer to local codes, 4. After removal of drain pan plugs, check the drain port to see if holes have been drilled. If not drilled, use a 19/32" bit to drill out the primary drain hole; use a 3/8" drill bit for the secondary drain hole. Remove all drill shavings. 5. Make sure drain ports and drain pan are free of all debris, 6. Plug and check any unused drain pan openings for tightness. Torque plugs to 30 in. lb. to prevent water leaks or seepage from the drain pan. 7. Install a 3" trap in the primary drain lines as close to the unit as practical (see figure 11). Make sure the top of the trap is below the connection to the drain pan to allow complete drainage of the pan. VENT MUST EXTEND ABOVE DRAIN PAN BY 2 INCHES THE HEIGHT clearance is required for filter, coil, or blower removal and service access, NOTE - Check local codes before connecting the drain line to an existing drainage system, Insulate the drain lines where sweating could cause water damage, TEST CONDENSATE 1, Pour several quarts of water into drain pan, enough to fill drain trap and line. 2, Check to make sure the drain pan is draining completely, no leaks are found in drain line fittings, and water is draining from the end of the primary drain line, 3, Correct any leaks found, DUCT SYSTEM The air handler is provided with flanges for the connection of the plenum and ducts, The air handler is equipped with flanges that can form a filter rack for the installation of the air filter, or the filter may be installed as part of the return air duct system, Supply and return duct system must be adequately sized to meet the system's air requirements and static pressure capabilities, The duct system should be insulated with a minimum of 1" thick insulation with a vapor barrier in conditioned areas or 2" minimum in unconditioned areas, Table 3. Unit Air Filter Size Chart OF THE COIL (51 MM). VENT DRAIN PAN TRAP MUST BE DEEP ENOUGH TO OFFSET MAXIMUM STATIC DIFFERENCE 2 INCHES [51MM]). LINE SHOULD SLOPE 10 FEET (25 MM PER 3 M) A MINIMUM 1 INCH PER TO APPROVED DRAIN Figure 11. Typical Drain Connection NOTE - Horizontal runs must have an anti-siphon air vent (standpipe) installed ahead of the horizontal run (See figure 11). An extremely long horizontal run may require an oversized drain line to eliminate air trapping. NO TE - Do not operate air handler without a drain trap. The condensate drain is on the negative pressure side of the blower; therefore, air being pulled through the condensate line will prevent positive drainage without a proper trap, 8, Route the drain line to the outside or to an appropriate drain. Drain lines must be installed so they do not block service access to the front of the air handler, A 24" 04_8 Filter Size -018 / -024 -030 / -036 16" x 20" 18" x 20" -037 through -060 18" x 25" Supply plenum should be the same size as the flanged opening provided around the blower outlet and should extend at least 3 ft. from the air handler before turning or branching off plenum into duct runs. The plenum forms an extension of the blower housing and minimizes air expansion losses from the blower, INSTALLING DUCT SYSTEM Install the conditioned air plenum, ducts and air filters (not provided) in accordance with NFPA 90B Standard for the Installation of Warm Air Heating and Air-Conditioning Systems (latest edition). Connect supply air duct to the flange on top of the air handler. If an isolation connector is used, it must be nonflammable, A return air duct system is recommended. If the unit is installed in a confined space or closet, a return connection must be run, full size, to a location outside the closet, Page 8 505059M Model (GENERAL TRAP (49P66) DRAIN DRAIN Test the drain pan and drain line after installation: Refrigerantlines must be connectedby a qualified technician in accordance withestablished procedures. Make sure the liquid line and suction line entry points are sealed with either Armafiex material or with Permagum. Permagum may also be used to seal around the main and auxiliary drains and around open areas of electrical inlets. `& IMPORTANT ,&WARNING 1. Route the suction and liquid lines from the fittings on the indoor coil to the fittings on the outdoor unit. Run the lines in as direct a path as possible avoiding unnecessary turns and bends. 2. Make sure that the suction line is insulated over the entire exposed length and that neither suction nor liquid lines are in direct contact with floors, walls, duct system, floor joists, or other piping. • All field wiring must be done in accordance with National Electrical Code, applicable requirements of UL and local codes, where applicable. • Electrical wiring, disconnect means and over-current protection are to be supplied by the installer. Refer to the air handler rating plate for maximum over-current protection, minimum circuit ampacity, as well as operating voltage. • The power supply must be sized and protected according to the specifications supplied on the product. • This air handler is factory-configured for 240 volt, single phase, 60 cycles. For 208-volt applications, see "208 Volt Conversion" later in this section. • For optional field-installed electric heat applications, refer to the instructions provided with the accessory for proper installation. 3. Connect the suction and liquid lines to the evaporator coil. 4. To avoid damaging the rubber grommets in the cabinet while brazing, slide the rubber grommets over the refrigerant lines until they are away from the heat source. 5. Braze using an alloy of silver or copper phosphorus with a melting point above 1,100°R and NOTE - Do not use soft solder. 6. Reinstall finished. the rubber grommets after brazing is 7. Make sure outdoor unit has been put in place according to the Installation Instructions and is connected to the refrigerant lines. Seal the unit so that warm air is not allowed into the cabinet. Warm air introduces moisture, which results in water blow-off problems. This is especially important when the unit is installed in an unconditioned area. WARNING 1. Disconnect all power supplies. 2. Remove the air handler access panel. 3. Route the field supply wires to the air handler electrical connection box. ,&WARNING `& IMPORTANT 4. Use UL-listed wire nuts to connect the field supply conductors to the unit black and yellow leads, and the ground wire to ground terminal marked "GND." Page 9 CB(X)26UH SERIES SEQ2 LIBI CB2 _ _ _/ ]2BLK 2ND 5 4 IHI--, ,2 BLK r STAGE ]2 BLK ]2 BLK m rm 12 YEL ___c_ I' 220 208/240 VOLTAGE 12 YEL HEATERS USED 5 KW SEQI IST ÷ CB} 12 BLK --_BLK LSI 12 BLK '"'l STAGE HEI 15 KW : HE],HE2 & HE3 20 KW : HEI,HE2, HE3 & HE4 12 BLK 12 YEL L : 75 & : HE] & HE2 I0 KW ]2 YEL ._Ez_ DIAGRAMWIRING DIAGRAM- ELECTRIC z HEAT 4 .... HE : HEATER ELEMENT i'_,,ii VOLTAGq NEOT. ..... LS : LIMIT ; , LPJ RELAY ÷ CB : CIRCUIT BREAKER (OPT.) GND : GROUND LUG ANUTS TO GROUND LUG _ -A B_ CAP : MOTOR CAPACITOR ISAMPJ" LROR/_ SUPPLY<. A BR : BLOWER NO HEAT_ /_ WIRE L z SWITCH POWER (FACTORY WIRED) POWER (FIELD WIRED) CONTROL (FACTORY WIRED) CONTROL (FIELD WIRED) CONTROL CIRCUIT WIRING TO BE 24 VOLT, MTR : BLOWER MOTOR PLUG PIN SEQ : SEQUENCER LOCATION ÷TB N.E.C CLASS 2 AMP 350781-I 6-PIN CAP : TERMINAL BLOCK(OPT.) ÷ ÷ TD : TIME DELAY(OPT,) II TR : TRANSFORMER 3 5 4 • 6 I_ ,N _8 BLK W2 _" BLK 18 WHT wl _' WHT 18 BLU C _" BLU c_ 208VI i; 18RED > "_H 18BLU 18 GRN G _" GRN 18 RED R _ RED 5 C 120V OR 220V 2 TD ** z oc MOTOR SPEED SELECTI ,,m- _2 I _ MED. SPEED NOT AV DETERMINED BY MODEL LABLE ON SOME MODELS 5 _ GND Ft. 14BLUE_MEb;f"Z_4_BRN/WHT ,lJr,4 RED(LO) I: ! 31_ .To 1. _4a_._} I: I J : IBLK_.I_'" }BRN"I" L" ,4YEL/co,,_.j _._j-- Figure 121 Wiring Page 10 505059M 04/08 Diagram CAP TO THERMOSTAT 5. Replacetheairhandleraccesspanel, 208 VOLT CONVERSION _WARNING CONNECT BLACK TO BLACK CONNECT UNIT'S YELLOW CONDUCTORTO WHITE FIELD SUPPLY CONDUCTOR CONNECT GROUND WIRE TO GROUND TERMINAL MARKED "GND" 1. Disconnect all power supplies. 2. Remove the air handler access panel. Figure 13. Making Electrical Connections THERMOSTAT [][]SEE NOTE '- I_ AIR HANDLER THERMOSTAT SEE ._ NOTE_:'I]_ % CONDENSING [23THERMOSTAT AIR HANDLER G _---_ COOLING-ONLY 3. Using the wiring diagram in figure 12 as a reference move the 2 connected black transformer leads from the 240 volt terminal on the transformer to the 208 volt terminal on the transformer. BU _] w % HEAT-ONLY APPLICATION UNIT THERMOSTAT APPLICATION AIR HANDLER HEAT PUMP UNIT AIR HANDLER [] _] SEE , NOTE _ _i _B° [] SEE NOTE [] [] CONDENSING UNIT COOLING APPLICATION ELECTRIC HEAT []- [] [] [] WITH HEAT PUMP APPLICATION WITH ELECTRIC HEAT NOTE - Connect common wire only if required (Refer to the appropriate thermostat installation instructions) Figure 14. Low Voltage Connections Page 11 CB(X)26UH SERIES 1. Disconnect all power supplies. 2. Remove the air handler access panel. The cooling blower speed is factory configured to provide correct airflow for an outdoor unit that matches the maximum cooling capacity rating of the air handler. 3. Locate pin number 2 on the blower relay. Two black wires are connected to this terminal pin. One connects to pin number 5 on the blower relay, one connects to an inline splice connecting to a red wire. If the outdoor unit is smaller than the maximum cooling capacity rating for the air handler, the cooling blower speed may need to be changed. Refer to Blower Performance Chart, table 4. 4. Remove the wire going to the 4-pin blower motor connector from the splice. 5. Connect the blower lead [Red (LO), Black (HI)] onto the splice from the 4-pin blower motor connector. CHANGE BLOWER SPEED NOTE - Refer to wiring diagram (figure 12) and blower performance (table 4). NOTE - Reuse the factory-installed plastic cap on whichever wire is not used. ,&WARNING 6, Replace all panels, 7, Reconnect power, NOTES FOR TABLE 4 - All air data measured external to unit with 1 inch non-pleated air filter in place, Electric heaters have no appreciable air resistance. All factory settings are high-speed. A data g ven wh ear Page 12 505059M 04_8 hander s operatng wth a drydx co . Table 4. CB(X)26UH Blower Performance (2-Speed) External Model Air Volume at Specific Blower Taps Static Pressure High (Black) Low (Red) in. w.g. Pa cfm L/s cfm L/s .10 25 1020 46O 755 340 .20 50 960 435 715 325 75 885 4OO 675 305 .40 .50 100 125 8OO 365 625 285 690 315 57O 260 .60 150 525 25O 500 235 .10 25 1040 47O 1000 455 .20 50 980 445 94O 425 -024 .30 75 905 410 87O 395 (MEDIUM SPEED) .40 100 815 370 785 355 .50 125 705 32O 68O 310 .60 150 535 25O 53O 250 .10 25 1350 610 1145 520 .20 50 1290 585 1090 495 -030 .30 75 1225 555 1030 465 (MEDIUM SPEED) .40 100 1150 52O 960 435 .50 125 1065 485 875 395 .60 150 965 455 775 365 .10 25 1560 7O5 1405 635 .20 50 1480 67O 1340 610 -036 .30 75 1390 630 1270 575 (LOW SPEED) .40 100 1290 585 1185 540 .50 125 1170 53O 1090 495 .60 150 1015 48O 975 46O .10 25 1570 74O 1330 625 .20 50 1520 715 1310 620 68O 1250 590 -018 .30 (LOW SPEED) -037 .30 75 1440 (LOW SPEED) .40 100 1300 615 1180 555 .50 125 1170 550 1070 505 .60 150 950 45O 840 395 .10 25 1940 88O 1785 810 .20 50 1845 835 1705 775 -042 .30 75 1745 790 1615 730 (MEDIUM SPEED) .40 100 1630 74O 1515 685 .50 125 1495 68O 1400 635 .60 150 1330 630 1265 595 .10 25 1945 88O 1870 850 .20 .30 50 75 1860 845 1790 810 1765 80O 1700 77O .40 100 1660 155 1600 725 .50 .60 125 150 1540 7OO 1485 675 1395 660 1350 635 .10 25 2160 98O 2075 94O .20 50 2065 935 1985 900 .30 .40 75 100 1960 89O 1885 855 1845 835 1775 805 .50 125 1710 775 1645 745 .60 150 1550 730 1495 705 -048 (suppoSed TXV on ly) (MEDIUM SPEED} -060 (MEDIUM SPEED) in Page 13 CB(X)26UH SERIES Table 5. CB(X)26UH Blower Performance (3-Speed) Air Volume at Specific Blower Taps Ext. Static Pressure Model Low (Red) Med (Blue) High (Black) in. w.g. Pa cfm L/s cfm L/s cfm L/s 0.10 25 655 309 794 375 1074 5O7 0.20 50 647 305 786 37! 1000 472 -018 0.30 75 628 296 747 353 913 431 (LOW SPEED) 0.40 100 578 273 672 317 8O9 382 0.50 125 480 227 555 262 672 3!7 0.60 150 0.10 25 655 309 794 375 1074 507 0.20 50 647 305 786 37! 1000 472 0.30 75 628 296 747 353 913 431 0.40 100 578 273 672 317 0.50 125 480 227 555 262 809 672 382 3!7 0.60 150 0.10 25 860 406 1020 481 1199 566 0.20 50 851 402 1006 475 1195 564 0.30 75 842 397 1003 473 1182 558 0.40 100 8!3 384 963 454 0.50 125 721 340 886 418 1121 1033 529 487 0.60 150 0.10 25 1135 536 1354 639 1494 705 0.20 50 1!20 529 1345 635 1469 693 -024 (MEDIUM SPEED) -030 (MEDIUM SPEED) -036 0.30 75 1112 525 13!7 62! 1417 669 (LOW SPEED) 0.40 100 1079 509 1260 595 1336 630 0.50 125 995 470 1090 514 1250 590 0.60 150 0.10 25 1202 567 1404 663 1540 727 0.20 50 1!92 563 14!3 667 1530 722 0.30 75 1160 547 1386 654 1507 711 0.40 100 1116 527 1303 615 0.50 125 998 471 1192 563 1386 1254 654 592 0.60 150 0.10 25 1593 752 1759 830 1886 890 0.20 50 1582 747 1709 806 1820 859 0.30 75 1526 720 1636 772 1742 822 0.40 100 1444 681 1538 726 0.50 125 13!8 622 1395 658 1606 1446 758 682 0.60 150 0.10 25 1782 841 2066 975 2109 995 0.20 50 1755 828 1960 925 2067 975 0.30 75 1672 789 1860 878 1949 920 0.40 100 1554 733 17!4 809 0.50 125 1393 657 1476 697 1770 1586 835 748 0.60 150 -042 (MEDIUM SPEED) -048 (MEDIUM SPEED) -060 (MEDIUM SPEED) Page 14 505059M 04/08 • NOTE - Refer to outdoor unit installation instructions for system start-up instructions and refrigerant charging instructions. PRE-START-UP COOLING (COOLING ONLY OR HEAT PUMP) When the thermostat calls for cooling, 24 volts is put on the blower time-delay relay coil. After a delay, the indoor blower relay energizes. The normally open contacts close, causing the indoor blower motor to operate. The circuit between R and Y is completed, closing the circuit to the contactor in the outdoor unit, starting the compressor and outdoor fan motor. CHECKS • Is the air handler properly and securely installed? • If horizontally configured, is the unit sloped up to 1/4 inch toward drain lines? • Will the unit be accessible for servicing? • Has an auxiliary pan been provided under the unit with separate drain for units installed above a finished ceiling or in any installation where condensate overflow could cause damage? • Have ALL unused plugged? • Has the condensate line been properly sized, run, trapped, pitched, and tested? • Is the duct system correctly sized, run, sealed, and insulated? • Have all cabinet openings and wiring been sealed? • Is the indoor coil factory-installed for the outdoor unit being used? • Have all unused parts and packaging been disposed of.'? • Is the filter clean, in place, and of adequate size? • Is the wiring neat, correct, and in accordance with the wiring diagram? • Is the unit properly grounded and protected (fused)? • Is the thermostat location? • Are all access panels in place and secure? drain pan ports been properly correctly TXV properly sized wired On heat pumps, circuit R and O energizes valve, switching the valve to the cooling reversing valve remains energized as thermostat selector switch is in the COOL and in a good The indoor blower should come on. CHECK COOLING OPERATION • Set thermostat to force a call for cooling (approximately 5°F lower than the indoor ambient temperature). • The outdoor unit should come on immediately and the indoor blower should start between 30 - 60 seconds later. • Check the airflow from a register to confirm that the system is moving cooled air. • Set the thermostat 5°F higher than the indoor temperature. The indoor blower and outdoor unit should cycle off. the reversing position. (The long as the position.) At the completion of the cooling demand and after the relay's time-delay, the compressor and outdoor fan will cycle off. HEATING (ELECTRIC HEAT ONLY) When the thermostat calls for heat, the circuit between R and W is completed, and the heat sequencer is energized. A time delay follows before the heating elements and the indoor blower motor come on. Units with a second heat sequencer can be connected with the first sequencer to W on the thermostat subbase, or they may also be connected to a second stage on the subbase. CHECK BLOWER OPERATION • Set thermostat to FAN ON, • Set the thermostat so that it does not call for heat, Allow up to 5 minutes for all sequencers to cycle off, CHECK ELECTRIC HEATER (IF USED) • Set thermostat to call for auxiliary heat (approximately 5°F above ambient temperature). The indoor blower and auxiliary heat should come on together. Allow a minimum of 3 minutes for all sequencers to cycle on. HEATING (HEAT PUMP) When the thermostat calls for heating, 24 volts is put on the blower time-delay relay coil. After a delay, the normally open contacts close, causing the indoor blower motor to operate. The circuit between R and Y is completed, closing the circuit to the contactor in the outdoor unit, starting the compressor and outdoor fan motor. Circuit R and G energizes the blower relay, starting the indoor blower motor. If the room temperature should continue to fall, the circuit between R and W1 is completed by the second-stage heat room thermostat. Circuit R-W1 energizes a heat sequencer. The completed circuit will energize supplemental electric heat (if applicable). Units with a second heat sequencer can be connected with the first sequencer to W1 on the thermostat. They may also be connected to a second heating stage W2 on the thermostat subbase. TIME DELAY RELAY On early production units, the indoor blower relay energizes after a 30 second delay and it remains energized for 30 seconds after the call is satisfied. The indoor blower will remain on for approximately 30 seconds before cycling off. In January 2006, the blower relay was changed second delay ON and "45" second delay OFF. to 1 EMERGENCY HEAT (HEATING HEAT PUMP) If the selector switch on the thermostat is set to the emergency heat position, the heat pump will be locked out of the heating circuit, and all heating will be electric heat (if applicable), A jumper should be placed between W2 and E Page15 CB(X)26UH SERIES on the thermostat subbase so that the electric heat control will transfer to the first-stage heat on the thermostat. This will allow the indoor blower to cycle on and off with the electric heat when the fan switch is in the AUTO position. cabinet. The temperature/humidity difference between the inside and outside of the cabinet can cause condensation on the inside or outside of the cabinet which leads to sheet metal corrosion and subsequently, component failure. REPAIRING DAMAGED INSULATION Contact your Lennox dealer for the following accessories: • Electric Heat Kit--See the accessory kit label on the front panel of the air handler for the electric heat kit options and accessories. IMPORTANT • Inspect air filters at least once a month and replace or clean as required. Dirty filters are the most common cause of inadequate heating or cooling performance, • Replace disposable filters. Cleanable filters can be cleaned by soaking in mild detergent and rinsing with cold water. • Install new/clean filters with the arrows on the side pointing in the direction of airflow. Do not replace a cleanable (high velocity) filter with a disposable (low velocity) filter unless return air system is properly sized for it, • If water should start coming from the secondary drain line, a problem exists which should be investigated and corrected, Contact a qualified service technician, Areas of condensation on the cabinet surface are an indication that the insulation is in need of repair. If the insulation in need of repair is otherwise in good condition, the insulation should be cut in an X pattern, peeled open, glued with an appropriate all-purpose glue and placed back against the cabinet surface, being careful to not overly compress the insulation so the insulation can retain its original thickness. If such repair is not possible, replace the insulation. If using foil-faced insulation, any cut, tear, or separations in the insulation surface must be taped with a similar foil-faced tape. Figure 15. Repairing Insulation WARNÁNG _IMPORTANT Matt- or foil-faced insulation is installed in indoor equipment to provide a barrier between outside air conditions (surrounding ambient temperature and humidity) and the varying conditions inside the unit, If the insulation barrier is damaged (wet, ripped, torn or separated from the cabinet walls), the surrounding ambient air will affect the inside surface temperature of the Page 16 505059M 04_8 ,t_2008 Lennox Industries Inc, Dallas, Texas, USA CB(X)26UH CHARGE USING SUBCOOLING METHOD(Fixed Orifice Systems) - Outdoor Temp. >65°F (18°C) 4. Subtract the liquid line temperature from the saturation temperature (according to the chart) to determine subcooling, Saturation Temperature °F ( °C) -- = Liquid Line Temperature °F (°C) = Subcooling Value °F (°C) 5. Compare the subcooling value with those in table 6 or table 7. If subcooling is greater than shown, recover some refrigerant. If subcooling is less than shown, add some refrigerant, NOTE - Subcooling is the recommended charging procedure IF return air conditions are 80°/= DB and 67 ° F WB. If return air dry bulb and wet bulb conditions are different, use the Superheat Charging method. If charging a fixed orifice system when the outdoor ambient is 65°F (18°C) or above, use the subcooling method to charge the unit, 1. With the manifold gauge hose still on the liquid service port and the unit operating stably, use a digital thermometer to record the liquid line temperature, IMPORTANT 2, At the same time, record the liquid line pressure reading. 3, Use a temperature/pressure chart to determine the saturation temperature for the liquid line pressure reading, Table 6. Subcooling °F (°C)** -018 -024 65 (18) 13 (7) 13 (7) 70 (21) 75 (24) 13 (7) 10 (5.6) 12 (6.7) 11 (6) 80 (27) 10 (5.6) 11 (6) 85 (29) 90 (32) 8 (4.5) 8 (4.5) 95 (35) 7 (4) Values For Fixed Orifice Systems 13ACD / AC13 Outdoor Condensing Units Models -030 -036 -042 7 (4) 6 15 (8.3) 13 (7) 12 (6.7) 12 (6.7) (3.3) 13 (7) 13 (7) 14 (8) 13 (7) 12 (6.7) 12 (6.7) 10 (5.6) 5 (3) 5 (3) 5 (3) 11 (6) 11 (6) 11 (6) 10 (5.6) 4 (2.2) 10 (5.6) 10 (5.6) 10 (5.6) 10 (5.6) 4 (2.2) 9 (5) 9 (5) 7 (4) 10 (5.6) 3 (2) g (5) 8 (4.5) 105 (41) 6 (3.3) g (5) 3 (2) 8 (4.5) 7 (4) 110 (43) 6 (3.3) 8 (4.5) 2(1) 6 (3.3) 7 (4) 6 (3.3) 2(1) 6 (3.3) 5 (3) 3 (2) -060 14 (8) 100 (38) 115 (45) (HCFC-22)* 13HPD / HP13 Outdoor ii//iiii//!!gilii/i!!iiigiiiiiiii/i/i;%iiii/_iiiii/iiiii/i!!!iiii_ ¸ !!!!!!!!!!i!ii!_!!!!!!!!_!!_!_!!!_!!_!!_!!!!!!!!!!!!!_!!!!!! _ 12 (6.7) 10 (5.6) ii//i!i/iiii!Ii////////%i///i%!/i/!//iiiii/i_iii/ii//i_iiii g (5) g (5) g (5) 8 (4.5) iliiiiil_ill_ill_ill_ill_ill_il_illlllllllllllllli Heat Pump Units Models °F (°C)** -018 -024 -030 65(18) 13(7.1) 15(8.2) 14 (7.7) 13(7.1) 13 (7.1) 75 (24) 10 (5.5) 13 (7.1) 12 (6.6) lO(5.5) lO (5.5) 11 (6) 85 (29) 8 (4.4) 11 (6) 11 (6) 8 (4.4) 8 (4.4) 10.5(5.8) lO(5.5) 9.5 (5.2) * -036 -042 -060 11 (6) 95 (35) 7 (3.8) 9 (5) 10(5.5) 7 (3.8) 7 (3.8) 105 (41) 6 (3.3) 8 (4.4) g (5) 6 (3.3) 6 (3.3) 115 (45) 3 (1.6) 3(1.7) 3 (1.7) Liquid Subcooling: ** Outdoor Ambient 5 (2.7) 6 (3.3) _i_i_iii_i_i_!_i_i_!_i_i_!_i_i_!_i_i_!_i_i_!_i_i_!_i_i_!_i_i_!_i_i_!_i_i_ 8.5 (4.7) + I'_F (,6'_C) Temperature, Page 17 CB(X)26UH SERIES Table 7. Subcooling Values For Fixed Orifice Systems XC13 Outdoor (HFC-410A)* Condensing Units Models °F (°C)** -018 -024 -030 -036 -037 -042 -048 -060 65 (18) 8 (4.4) 14 (7.7) 10 (5.6) 10 (5.6) -- 13 (7.2) 15 (8.3) 11 (6) 70 (21) 4 (2.2) 13 (7.2) 9 (5) 8 (4.4) -- 12 (6.7) 14 (7.7) 10 (5.6) 75 (24) 3 (1.7) 12 (6.7) 8 (4.4) 7 (4) -- 11 (6) 13 (7.2) 10 (5.6) 80 (27) 2 (1) 11 (6) 7 (4) 7 (4) -- 11 (6) 12 (6.7) 10 (5.6) 85 (29) 2 (1) 11 (6) 6 (3.3) 6 (3.3) -- 10 (5.6) 11 (6) 9 (5) 90 (32) 2 (1) 9 (5) 5 (2.7) 5 (2.7) -- 9 (5) 10 (5.6) 9 (5) 95 (35) 2 (1) 9 (5) 4 (2.2) 4 (2.2) -- 8 (4.4) 9 (5) 8 (4.4) 100 (38) 1 (0.5) 7 (4) 4 (2.2) 4 (2.2) -- 7 (4) 9 (5) 8 (4.4) 105 (41) 1 (0.5) 6 (3.3) 3 (1.7) 3 (1.7) -- 7 (4) 8 (4.4) 7 (4) 110 (43) 1 (0.5) 6 (3.3) 2 (1) 2 (1) -- 6 (3.3) 7 (4) 7 (4) 115 (45) 1 (0.5) 5 (2.7) 2 (1) 2 (1) -- 5 (2.7) 6 (3.3) 6 (3.3) °F (°C)** -018 -024 -030 -036 -037 -042 -048 -060 65 (18) -- 7 (4) 13 (7.2) 15 (8.3) 8 (4.4) 13 (7.2) 10 (5.6) 10 (5.6) 75 (24) -- 5 (2.7) 10 (5.6) 13 (7.2) 7 (4) 10 (5.6) 9 (5) 9 (5) 85 (29) -- 5 (2.7) 8 (4.4) 11 (6) 6 (3.3) 8 (4.4) 8 (4.4) 8 (4.4) 95 (35) -- 4 (2.2) 7 (4) 9 (5) 6 (3.3) 7 (4) 8 (4.4) 6 (3.3) 105 (41) -- 3 (1.7) 6 (3.3) 7 (4) 5 (2.7) 6 (3.3) 7 (4) 5 (2.7) 115 (45) -- 2 (1) 3 (1.7) 5 (2.7) 4 (2.2) 3 (1.7) 5 (2.7) 4 (2.2) XP13 Outdoor * Liquid Subcooling ** Outdoor CHARGE Ambient USING Heat Pump Units Models [ + 1<_F (.6<_C)] Temperature. SUPERHEAT METHOD --(Fixed Orifice Systems) - Outdoor Temp. >40°F (4°C) This charging procedure should not be used if ambient temperatures are below 40°F (4°C), For best results, indoor temperature should be 70°F (21°C) to 80°F (26°C), Measure the wet bulb temperature of indoor return air and dry bulb temperature of the outdoor entering air, Use table 8 to find the superheat value at those conditions, Table 8. Superheat Values For Fixed Orifice Systems *D_ bulb ou_oor 50 52 54 56 58 70 72 74 76 40 15 18 20 23 26 29 32 34 38 41 43 46 48 51 45 13 16 18 21 24 27 30 33 36 39 41 44 46 49 50 11 14 16 19 22 25 28 31 34 37 39 42 44 47 55 9 12 14 17 20 23 27 30 33 36 38 40 42 44 60 7 10 12 15 18 21 24 27 30 33 35 38 40 43 6 10 13 16 19 21 24 27 30 33 36 38 41 7 10 13 16 19 21 24 27 30 33 36 39 6 9 12 15 18 21 24 28 31 34 37 5 8 65 70 75 80 Wet bulb (air entering indoor coil) 60 62 64 66 68 12 15 18 21 25 28 31 35 85 8 11 15 19 22 26 30 33 90 5 9 13 16 20 24 27 31 6 10 14 18 22 25 29 100 95 8 12 16 21 24 28 105 5 9 13 17 22 26 6 11 15 20 25 8 14 18 24 110 115 * Dry-bulbtemperature (°F)of outdoor entering air. NOTE- Do not attempt to charge system where a dash appears, system could be overcharged. Superheat is taken at vapor line service port. Vapor line superheat mum never be lessthan 5°F at the vapor line service port, Page 18 505059M 04/08
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