NORDYNE Air Handler (indoor Blower&evap) Manual L0801591
User Manual: NORDYNE NORDYNE Air Handler (indoor blower&evap) Manual NORDYNE Air Handler (indoor blower&evap) Owner's Manual, NORDYNE Air Handler (indoor blower&evap) installation guides
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indoor Air Handlers These instructions are primarily intended to assist qualified individuals experienced in the proper installation of heating and/or air conditioning appliances. Some local codes require licensed installation/service personnel for this type equipment. All installations must be in accordance with these instructions and with all applicable national and local codes and standards. Before beginning the installation, read these instructions thoroughly and follow all warnings and cautions in the instructions and on the unit. When performing brazing operations have a fire extinguisher readily available and use a quenching cloth and brazing shield. Improper installation, service, adjustment, or maintenance can cause fire, electrical shock or other conditions which may result in personal injury or property damage. Unless otherwise noted in these instructions, only factory authorized kits or accessories may be used when modifying this product. Table of Contents 1. Air Handier Specifications ................................................................................................... Unit Dimensions .................................................................................................................... 4=5 4 2, Installation Requirements ....................................................................................................... Minimum Ampacity and Maximum Overcurrent Protection ................................................... 5 5 3. Air Ducts, Filters, 6 Horizontal 4. Verify Pressurization 5. Refrigerant Applications ............................................................................ ............................................................................................................... Line Connections 9 ................................................................................................ 9 6. Electrical Wiring ..................................................................................................................... 11 7. Start=up and Adjustment ....................................................................................................... 13 8. Optional 17 Humidistat (Variable Speed Only) ......................................................................... 9. Care and Maintenance ........................................................................................................... 18 3 1. AiR HANDLER SPECiFiCATiONS applications when applied with the appropriate field kit (See Technical Specifications). Indoor Air Handlers are designed and approved for attic, basement, alcove, closet and crawl space installations. Dimensional Figure 1. Factory ready horizontal Air Handlers may be applied in upflow or horizontal-left and -right discharge applications. These units may also be applied in downflow discharge when applied with the appropriate field kit (See Technical Specifications). drawing for the unit is shown in Field-installed electric heater kits are available. Available heater kits for these units are listed in the Technical Specifications. Instructions for installing the electric heaters are included with the heaters. All units equipped with standard blowers may be upgraded to variable speed with the addition of a variable speed conversion kit. See Technical Specifications for details. Vertical only Air Handlers are factory ready for upflow applications.These units may be applied in downflow or horizontal left and right discharge J-3/4" 7 13' _11/8" K.O. (typ.) 11/4"15/8 17/8'q 2 5/8"-] _11/8"K.0. -" (typ.) 5 5/8" _ i _ 13/4" K.O. (typ.) DETAIL"D"_ 3114'_ 21/4'L LIQUID • SUCTION 151_ Cabinet Size H W A Detail D A 43=5/16 14=3/16 12=3/4 No B 43=5/16 19=11/16 18-1/4 No Tall B 49=5!16 19=11/16 18-1/4 No C 55=15!16 22=7/16 21 Yes Figure 1. Unit Dimensions 4 Air handlers set up with 15 kw or more of electric heat will normally be configured for multiplecircuit power supply. They may, however, be connected to a single-circuit power supply with the addition of a single ci rcuit accessory kit (See Technical Specifications). Select the wire size and over-current protection in accordance with the minimum circuit ampacity and maximum over-current protection shown in Table 1. 2. INSTALLATION stallation of Air Conditioning and Ventilation Systems" (NFPA 90A), "Standard for Installation of Residence Type Warm Air Heating and Air Conditioning Systems" (NFPA 90B), these instructions, and all applicable local codes. National Fire Protection Association, Batterymarch Park Quincy, Maine 02269 www.nfpa.org (617) 770-3000 REQUIREMENTS Check Equipment -- All installations shall be made as described in these installation instructions and in accordance with all applicable national and local codes including the requirements of local utilities. Location -- To insure proper condensate drainage, the unit must be installed in a level position within 1/4 inch over the height, width, and depth of the unit. The best system performance will be obtained if the unit is located in a centralized position with respect to the air distribution system. Requirements and Codes-Electrical power wiring must be made in accordance with all applicable local codes and ordinances, and with the cu rrent revision of the National Electric Code When an air handler is installed in or above a living space, the installation of an auxiliary drain pan under the entire unit is required to reduce the possibility of property damage. (ANSI/NFPA 70). Air ducts must be installed in accordance with the standards of the National Fire Protection Association "Standard for In- These wiring requirements with 115 volt units. Inc. are for units with optional heater kits. They can not be used Au=..eatInstalled IN_N_lnn<_l nn_ InlnHInl<_ln>n_ln><_ln*n_l _"°m_w_I.... !..........I ! ......................... ! I ! ! ! '°5 *WireAWG75°C !14 ! 8 !8<_*>! 8 !4<3q2 ! 0 !00 ! O Maximum I I240 VAC, I 50 I& 60HzI Single I Phase I I I Over-currentI 18 I 40 I 80 I 60 I 901128118611781 __ Rating u I ! ! ! ! ! ! ! I *wireAwG60oc ! 14! 8 ! 6 14141414141 *w,reAwG_oc !14 ! 8 !8<6-_! 8 ! 6! 6! 6! 6 ! Maximum Circuit Arnp._I ***Min, ! I I I I I I I I ! ! ! ! ! ! ! I Over-current I 18 1461 80 1661691691661861 Rating Circuit '_ ! ! Amp. *WireAWG75°C - - - ! - !-! Ma=_mu.,,I! - I!-!- I =- *wire_w_°°°c Over-_urrent I - I - I Rat ng ! Amp. ! - ! - - 25.6 - !-! 59.6 56.6 56.9 .... . . . . . . 19! 8 ! 8 ! 8 ! I!- I!19!6!6!6!_ I I I I - I - 1391691661691 ! - ! - ! - ! - ! 25.0 I 50.0 ...... _ *w_reAW_°c!- ! - ! - ! - ! - ! - ! 16!8 ! Ma=_.,u.,, I _ I!-! I - I!-!-!-!1618!_ I I I I I "*,,io. Circ.,.Wire_W_00oc! Over-_urrentI - I - I - I - I - I - 1361691 Ratng ! ! ! ! ! ! ! ! I *All wire sizes for copper conductors only, based on NEC Table 310-16. **Required for C-cabinet variable speed. **Circuit arnpacity slightly higher for variable speed. See label on blower. Table 1. Minimum Ampacity and Maximum Overcurrent Protection 5 Allservicingandcleaningoftheairhandlercan be donefrom the front.Adequatehorizontal clearancesshould be providedto allow for serviceandcareoftheunit.Aminimum24inch clearance atthefrontoftheunitisrecommended. Theseunitsaresuitableforattic,closet,crawl spaceor alcoveinstallationat zeroclearance fromcombustibles. Association "Standard for Installation of Air Conditioning and Ventilation Systems" (NFPA 90A), "Standard for Installation of Residence Type Warm Air Heating and Air Conditioning Systems" (NFPA 90B), these instructions, and all applicable local codes. -- The condensate pan has primary and secondary drain connections. The connections have 3/4 inch female pipe threads. Use transition fittings if the supply and/or return air openings of the unit do not match the duct openings. These transitions should be dimensioned in accordance with standard practice as specified in the ASHRAE recommendations for duct transitions. All condensate Flexible connectors should be used between the CondensateDrain drains should be a minimum of 3/4 inch PVC pipe or equivalent. The drain should maintain a minimum horizontal slope in the direction of discharge of not less than 1 inch vertical for every 10 feet of horizontal. If the air handler is located in or above a living space where damage may result from condensate overflow, an auxiliary drain pan shall be installed under the unit. A separate drain line should extend from the pan to a conspicuous point and serve as an alarm indicating that the primary drain is restricted. As an alternative to a separate drain line, an approved water level indicator or float switch device should be used to shut down the unit in the event water is detected unit and the ductwork to prevent transmission of vibration from the unit to the structure. If electric heater kits are installed, heat resistant material must be used for the flexible connector at the supply air end of the unit. Air Filter Installation -- The filter may be located in the return air duct system or installed into the air handler filter track located in the bottom of the unit. To install the filter, remove the filter door. The filter sizes for the air handler cabinets are: Cabinet 12x20x1 in the auxiliary pan. Install a 5 inch trap in the condensate drain line as close to the coil as possible. Make sure that the top of the trap is below the bottom of the drain pan to prevent the condensate from overflowing the drain pan. Prime the trap with water. Insulate the drain if it is located in an unconditioned space, and test the condensate line for leaks. Consult local codes for additional restrictions or precautions. NOTE: There must be only one trap in the drain line. Using more than one trap may prevent drainage. IMPORTANT: The plastic drain pan must be level or slightly sloped toward the drain lines. Filter 18x20x1 C 20x20x1 z WARNING: Never operate the unit without ter or with the doors removed. a filDust and lint in the return air can build up on internal components, resulting in a loss of efficiency, equipment damage, and possible fire risk. Upflow Applications -- All air handlers are factory shipped, ready for upflow configuration, all return air must enter from the bottom of the unit. A typical installation of the unit in a ducted return air mode is shown in Figure 2. 3. AIR DUCTS, FILTERS, HORIZONTAL APPLICATIONS Downflow Applications -- The downflow accessory kit (See Technical Specifications) is required for downflow applications. Instructions for installing the downflow accessory kit are included with the kit. It is recommended that Air ducts should be installed in accordance with the standards of the National Fire Protection the accessory be installed prior to installing the unit. All return air in downflow applications 6 mustenterthroughthetopofthe unit.Atypical installation oftheunitina downflowapplication is shownin Figure3. Horizontal Left And Horizontal Right -- Air handlers may or may not be shipped from the factory with all the parts required for horizontal left applications and horizontal right applications (see Figure 4). If your unit does not have parts for a horizontal application, a kit is available (see Technical Specifications). To Configure Installations: Unit for Horizontal LEFT 1) Remove the coil access door. 2) iMPORTANT: Remove the plug from one of the threaded holes in the horizontal drain pan. Completely remove the webbing located in the threaded holes of the horizontal drain pan. If webbing is not removed, the drain will not function properly and ceiling damage may occur. 3) Insert a plug (from the horizontal drain pan) into the open and unused drain hole in the drain pan at the bottom of the unit to block bypass air. 4) Remove the corresponding drain line knockout from the coil access door to allow access to the horizontal drain. 5) Replace the door and attach the drain line. To Configure Installations: Unit for Horizontal RIGHT 1) Remove the coil access door. Unscrew the line-set tube close-off plate from the front left cabinet rail. 2) Slide the coil and drain pan assembly out of the unit. 3) Remove the sheet metal hairpin covers (if supplied) from the back of the coil and discard. 4) Place the horizontal drain pan on the opposite side of the coil. On units with 2 sets of knockouts, remove the other set of knockouts in the coil spacing plates and insert support rod. 5) Slide the coil and the horizontal drain pan assembly back into the unit. Reattach the tube close off plate. 6) iMPORTANT: Remove the plug from one of the threaded holes in the horizontal drain pan. Completely remove the webbing located in the threaded holes of the drain pan. If webbing is not removed, the drain will not function properly and ceiling damage may occur. Insert the plug (from the horizontal drain pan) into the open and unused drain hole in the drain pan at the bottom of the unit to block bypass air. 7) Remove the corresponding drain line knockout from the coil access door to allow access to the horizontal drain. 8) Replace line. the door and attach the drain J L______ Figure 2. Upflow Installation Figure 3. Downflow J Installation 7 The unitmayalsobe installedin a horizontal applicationwith the unitsuspendedfromthe ceiling.A typicalinstallationof the unit in a suspendedhorizontalapplicationis shownin Figure4. MetalandAir Conditioning Contractors National Association(SMACNA)applicationstandard forductliners. DuctliningmaterialmustbeULclassifiedbatts or blanketswitha fire hazardclassification of FHC-25/50or less. Fiber ductworkmay be usedin placeof internalductlinersifthe fiber ductworkis inaccordance withthecurrentrevisionofthe SMACNAconstructionstandardon fibrousglassducts. NOTE:In all horizontalapplicationsin which the unit is installedabovea finishedceiling and/or livingspace,a secondarydrain pan must be installed under the entire unit to avoid damageto the ceilingin the eventof condensateoverflow. Fibrousductworkandinternalacousticallining mustbeNFPAClassI airductswhentestedper ULStandard181forClass1 ducts. SupplyAir Ducts-- Benduptheflangesonthe top of theunitandconnectthesupplyair duct overthem.Securetheducttotheflange,using appropriatefastenersforthetypeofductused. Sealthejointbetweentheductandtheunitto avoidairleakageandsweating. Thesupplyair ductworkmustbe of noncombustible material forthefirst24 inchesfromthe unit. Through-the-FloorInstallations--Whenever the supplyor returnair ducts pass through the floor,a 1/4"thicknoncombustible resilient gasketmustbe usedbetweenthe duct,unit andfloor. Someinstallationswith a short,straightrun from the unit to the first branchtakeoffmay requireacousticallininginsidethe supplyair ductwork.Acousticalinsulationmustbe in accordancewiththecurrentrevisionoftheSheet Ductwork in Unconditioned Spaces -- All ductwork located in unconditioned space must be adequately insulated to prevent excess duct loss and condensation. All externally insulated ductwork must have an adequate vapor seal. _-THREADED ROD SUPPORT LOCATION MEMBER OF THE BLOWER DECK Figure 4. Typical Horizontal Installation Using Threaded Rod and Supporting Members (Shown in Horizontal Left Position) 8 ConsultyourDistributorfortherecommended type andthicknessof insulationforyourarea as requiredby localcodes. 4. VERIFY The orifice employed in the air handlers has been sized for use with the most popularly matched outdoor unit.The orifice size in the coil as shipped from the factory is listed on the air handler rating plate. Check that the orifice size provided with the air handler is correct for the outdoor unit being applied. If the orifice size is incorrect it should be replaced as follows: PRESSURIZATION WARNING". NITROGEN z WARNING: HEALTH [] FLAMMABILITY [] REACTIVITY [] NITROGEN O Minimal Hazard 1 Slight This coil is pressurized with Nitrogen. Pressure must be relieved in order to prevent the potential of an injury or fatality from the cap during the removal process, Avoid direct face exposure or contact with valve when gas is escaping. Always ensure adequate ventilation is present during the depressurization process. Any uncertainties should be addressed before proceeding. VERIFY PRESSURiZATiON: Test by depressing Schrader valve and listen for escaping gas If no pressure is found, test coil for leak - If no leak is found, install coil - If leak is found, clearly mark leak location and return coil to your distributor for processing 5. REFRIGERANT CONNECTIONS [] FLAMMABILITY [] REACTIVITY [] 0 Minimal Hazard 1 Slight Hazard This coil is pressurized with Nitrogen. Pressure must be relieved in order to prevent the potential of an injury or fatality from the cap during the removal process. Avoid direct face exposure or contact with valve when gas is escaping. Always ensure adequate ventilation is present during the depressurization process. Any uncertainties should be addressed before proceeding. 1. 2. LINE Note: Do not remove seals from the coil until tubing connections HEALTH Hazard Remove cap from SchradervaIve on liquid line. Relieve all pressure from the coil by depressing the valve on the end of the liquid line. Remove the valve core. Properly dispose of all removed parts. Loosen the distributor body halves by applying two wrenches and squeezing them together as shown in Figure 5, to turn the assembly nut counterclockwise. are ready to be made. Note: The air handler coil does not contain a refrigerant charge. instructions included Reference installation with outdoor unit for information regarding the refrigerant included in the outdoor unit. charge Note: The following instructions are for air handler models employing an orifice for the refrigerant metering device. Figure 5. Wrenches on Distributor Body and Assembly Nut 9 Note: On models which use aTXV, it is recommended to wrap a wet rag around the suction line between the sensing bulb and the line set braze joint before applying any heat. 10. Unbraze and remove the cap on the suction line. Unbraze and remove the valve core holder on the liquid line. Figure6. Removalof Orifice 11. Cut the line set tubing to the proper length. Be sure that the tubing has been sized in accordance with the outdoor unit specifications. 12. Inspect both refrigerant lines. The ends of the lines must be round, clean, and free of any burrs. 13. Place grommets in proper orientation onto lineset with sufficient distance to braze joint as to not damage the grommets. 14. Insert the line set tubes into the coil tube Figure 7. Orifice insertion in Distributor 3. 4. 5. 6. 7. stubs until they bottom out. Body Continue to unscrew the assembly nut to separate it from the distributor body. Insert a light-gauge wire hook between the distributor body and the orifice to lift the orifice out of the body (See Figure 6). Carefully remove the orifice being careful not to scratch either part. Check the actual size of the new orifice (the size is stamped on the side of the orifice). Insert the new orifice in the distributor body as shown in Figure 7. After installing the orifice in the distributor body, re-attach the assembly nut to the distributor body and tighten it to 10-12 ft/Ibs of torque. If no torque wrench isavailable, mark a line along both the nut and body after hand tightening and then tighten an additional 1/4 turn.The misalignment of the two lines will show how much the nut is tightened. Line Connections: 8. 9. If not already done so, release pressure from the coil by removing the valve cap and then depressing the valve on the end of the liquid line. Remove the valve core and dispose of properly. Making note of orientation, remove the hole grommets and tube close-off insulation from around the coil and refrigerant line set. 10 Note: On models which use aTXV, it is recommended to wrap a wet rag around the suction line between the sensing bulb and the line set braze joint before applying any heat. 15. Braze the individual connections with dry nitrogen flowing through the joints to eliminate internal oxidation and scaling. 16. Replace grommets and insulation. Check the assembly for leaks. 17. Properly dispose of all removed parts. Note: On horizontal or downflow applications of models with the TXVs, to ensure proper performance, the sensing bulb must be re-positioned so it is in the 4 o'clock or 8 o'clock position on the suction tube after final orientation of the air handler. z WARNING: To avoid the risk of electric shock, personal injury or death, disconnect all electrical power to the unit before performing vice. The any unit one electrical maintenance may power have or sermore supply. than 6. ELECTRICAL WiRiNG General -- Electrical power wi ring must be made in accordance with all applicable local codes and ordinances, and with the current revision of the National Electric Code (ANSI/NFPA 70). If any of the original wire as supplied with the unit must be replaced, it must be replaced with wire material having the same gauge and temperature rating. Disconnection means: a means to disconnect the appliance must be incorporated in the fixed wiring. LineVoltage-Before proceeding with the electrical connections, make certain that the voltage, frequency, and phase of the supply source are the same as those specified on the rating plate. Also, verify that the service provided by the utility is sufficient to handle the additional load imposed by this equipment. See the unit wiring label for proper high and low voltage wiring. Make all electrical connections in accordance with the National Electric Code and any applicable local codes or ordinances. Use a separate branch electrical circuit for this unit. A disconnecting means must be located within sight of, and readily accessible to, the unit. When electric heat packages with circuit breakers are field-installed, the circuit breaker may be used as a disconnecting means in most applications. Reference the NEC and Local Codes for Disconnect requirements. 208/240 volt units are shipped from the factory wired for 240 volt transformer operation. For 208 volt operation, remove the lead from the transformer terminal marked 240v and connect it to the terminal marked 208v. For maximum ampacity and overcurrent protection, see Table 1. Provide power supply (or supplies) for the unit in accordance with Table 1, the unit wiring diagram and the unit rating plate. When a heater kit is installed: Connnect the 2 wire plug of the air handler with the mating 2 wire plug of the heater kit. Connect the line voltage leads to the circuit breaker or terminal block provided. Connect the heater kit plug with the mating receptacle on the air handler control board. When installing a 25 kw or 30 kw heater kit, follow the instructions provided with the kit for proper installation. When a heater kit is not installed: Remove the 2 wire plug of the air handler by cutting the wires and discarding the plug. Strip the ends of the 2 air handler wires and connect to the line-voltage leads with the 2 wire nuts provided. Use copper wire only for the line voltage power supply to this unit. Aluminum supply wire may be used if a heater kit is installed. Use UL listed conduit and a conduit connector for connecting the supply wires to the unit and for obtaining proper grounding. Grounding may also be accomplished by using the grounding lug provided in the control box. Field supplied bushings for the power supply cables must be added to support and protect the power supply cables. HEATING ELEMENT LOGIC The control board in the air handler controls the timing sequence of the elements. Depending on the thermostat connection, there are 2 timing sequence variations that can be chosen. See table 2 for element sequence timing. The board also is equipped with a 3 second blower on delay and a 15 second blower off delay. z WARNING: The unit cabinet must have an uninterrupted and unbroken electrical ground to minimize the risk of personal injury if an electrical fault should occur.This ground may consist of electrical wire or approved conduit when installed in accordance with existing national or local codes. Low Voltage -- Install the grommet, which is packed with the unit, in the hole for low-voltage wires.When the low voltage wires are positioned in this grommet, the grommet will prevent chafing and/or shorting of the low voltage leads. Connect the low-voltage wiring to the thermostat and the outdoor unit and the appropriate screw terminal located on the control board. NOTE: Where local codes require that the thermostat wiring must be routed through a conduit or raceway, splices can be made inside the unit; however, all wiring must be NEC Class 1 and must be separated from incoming power leads. 11 NOTE: Jumper Wl and W2 together shorter for staging See time. a 2 NOTE: Jumper W1 and W2 together for Thermostat GRW 000 Y ) shorter staging time. See table 2 c o @\ Y/Y2 (_ G @-- r / Thermostat / G R W2C E O Y / / OOO000_)[ NOTE: Jumper betweenW2 and E is requiredwhen no OD T-Stat is used. "--_- c @ Air Handier Typical A/C OD Section Air Conditioner w/Standard Air Handier Wl and Jumper W2 NOTE: together for shorter staging le. See table 2 Yl o Thermostat G RW Y_ Air Handier Heat Pump OD Section Typical Heat Pump w/Standard NOTE: Jumper Wl and W2 together for shorter Air Handler Thermostat G RW2C E O Y staging time. See table 2 \_ @. COY G G R G ° @ NOTE: in AC appLications,the Oand Y connection must be connected as shown. Air Handier NC OD Section Typical Air Conditioner with Variable Speed Air Handler Air Handler Heat Pump OD Section Typical Heat Pump with Optional Outdoor Thermostat and Variable Speed Air Handler * On single stage systems connect to Y/Y2 to obtain selected cooling speed Figure 8. Typical Air Conditioning 12 and Heat Pump System Connections NOTE: Jumper Wl and W2 [I together / IG R W for shorter I] NOTE: Jumper [ I Wl and W2 together for shorter staging time. See table 2 / / G [ ' / ?t / I Thermostat Y2 / SS't 7't ,te' Y1 Thermostat RW2C J O Y1 Y2 WlW3 , O (I/_ _Y2 ° @_ t I I o[ C COY1 Y1 Y/Y2 (_ G (_-- c (_-_ \. _ _ o @ _ NOTE: in AC applications, connection Air Handler the 0 and Y mustbeconnectedasshown, A/C OD Section Typical 2-Stage Air Conditioner with Variable Speed Air Handler Air Handler Heat Pump OD Section Typical 2-Stage Cooling Heat Pump with Optional Outdoor Thermostat and Variable Speed Air Handler Figure 9. Typical 2-Stage Air Conditioning and 2-Stage Heat Pump System Connections iMPORTANT! On variable speed models when the unit is used in an air conditioning system, connect the "O" terminal to the "Y" terminal. See Figure 8 & 9. CAUTION: isolation must be maintained from the external Class 2 output of any transformer in a cooling circuit. Use a thermostat with isolating contacts to prevent inter-connection of Class 2 outputs. Check all factory wiring per the unit wiring diagram and inspect the factory wiring connections to be sure none were loosened in transit or installation. CAUTION: Make sure all doors are installed before restoring power to the unit. 7. START=UP AND ADJUSTMENT General -- Prior to start-up, verify that: 1. The line voltage power leads are securely connected and that the unit is properly grounded. 2. The low voltage wires are securely connected to the correct leads from the unit. 3. The upper and lower doors are in place and securely connected to the unit. NOTE: The control board is programmed with a 40 second off delay in the cooling mode for optimum system performance and efficiency. Selecting Proper Blower Speed for MultiSpeed Units -- The blower speed is preset at the factory for operation at the same speed for heating and cooling, by using the blower motor jumpering terminal on the blower motor and connecting it to the desired speed with both the red and black wires connected to the jumpering terminal. For optimum system performance and comfort, it may be necessary 13 Control Signal Board Action Operation On W1 only Off On W1 &W2 Off On W1 & Y/Y2 Off IStage 1 Heat on instantly Heat blower on after 3 second delay i Stage 3 & 5 Heat on after 1 minute delay Stage 2 Heat on after 2 minute delay i Stage 4 & 6 Heat on after 3 minute delay Heat stages off instantly Blower off after 15 second delay IStage 1 Heat on instantly Heat blower on after 3 second delay Stage 3 & 5 Heat on after 10 second delay Stage 2 Heat on after 20 second delay l Stage 4 & 6 Heat on after 30 second delay IHeat stages off instantly Blower off after 15 second delay IStage 1 Heat on instantly Cool blower on after 3 second delay i Stage 3 & 5 Heat on after 1 minute delay Stage 2 Heat on after 2 minute delay IStage 4 & 6 Heat on after 3 minute delay IHeat stages & Cool blower off instantly Heat blower energizes and then turns off after 15 second delay I On i Stage 1 Heat on instantly Cool blower on after 3 second delay i Stage 3 & 5 Heat on after 10 second delay JStage 2 Heat on after 20 second delay IStage 4 & 6 Heat on after 30 second delay Off IHeat stages and Cool blower off instantly Heat blower energizes and then turns off after 15 second delay W 1, W2 & Y/Y2 Table 2. Heating to change the factory set speed.To change the blower speed, disconnect all electrical power to the unit and remove the upper door. Remove the black and red wires from the blower motor jumpering jumpering terminal. Discard the blower motor terminal. Connect the heating speed wire (red) and the cooling speed wire (black) to the desired blower speed marked on the terminal block of the blower motor. On standard 3 speed motors terminal 4 = Hi speed, terminal 5 = Med speed and terminal 6 = Low speed. Standard C cabinet units are equipped with 5 selectable blower speeds. Terminal 1=Low speed, terminal 2=Medium Low speed, terminal 3=Medium speed, terminal 4=Medium Hi speed and terminal 5=Hi speed. See table 3 for airflow data. Replace the upper door and secure it to the unit. Restore power to the unit. Selecting continuous low speed fan opera= tion (Standard Blower) -- The air handler is 14 Element Logic equippedwith the option of continuouslowspeed fan operation.When G isenergized withoutY/Y2, the air handier wiii operate using the heating speed. With G &Y/Y2 orY/Y2 is energized, the air handier will operate in the selected cooling speed (including 40 sec blower-off delay). NOTE: To achieve continuous low speed fan operation Y must be connected at the air handler. Selecting Proper Airflow for Variable Speed Units -- Variable speed air handlers are equipped with a microprocessor-controlled variable speed motor that is pre-programmed to deliver optimum airflow in a variety of conditions and system configurations. Before operation, the air handler must be configured to match the unit with the system, system options, and climatic conditions. Once configured, the air handler responds directly to the thermostat inputs, as well as the optional humidistat (Section 7). D uring no rmal ope ration, the motor will grad ually change speeds during start-up, shut down, System Airflow Data Dry Coil EBP Low CorrectedESP "24/'25K, A-Cabinet _ Medium Co rrectedESP_ High Co rrectedESP_ Dry Coil EBP Low A-Cabinet Corrected 0,65 0,76 861 823 781 734 682 625 564 498 O,OO O, OO 0,11 0,23 0,36 0,48 0,60 0.72 1072 1026 975 920 860 797 730 859 O,OO O, OO O.OO 0,14 0,27 0.40 0.53 0,67 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 647 581 508 0,50 0,62 0,74 1118 1087 1046 997 940 874 799 717 O.OO O, OO 0,04 0,17 0.29 0,42 0,55 0,68 1277 1233 1184 1130 1070 1005 935 860 O,OO O, OO 0,00 0,10 0,23 0,36 0,49 0,63 EBP 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 Low 708 890 664 628 584 532 471 401 O, 08 O, 19 O,30 O,41 O,53 O, 64 O, 76 904 886 854 810 753 883 600 O, 10 0.22 0,38 0,46 0,58 O, 71 1126 1101 1056 992 908 805 O.09 0,22 O,85 O, 49 O,64 _ _ 909 1118 1132 ESP 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 Low 953 915 871 821 764 701 631 555 0,00 0,04 0,16 0,27 0,39 0,51 0,62 0,74 1265 1232 1188 1133 1067 991 903 805 O,OO O, OO 0,03 0,15 0,28 0,41 0,54 0,68 High 1427 1385 1333 1270 1196 1113 1018 913 ESP _ 0,00 O, O0 O,OO 0,09 0,23 0,36 0.50 0,64 EBP 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 Low 1324 1302 1271 1233 1187 1134 1072 1003 Dry Coil _ _ CorrectedESP _ Medium CorrectedESP _ High Corrected ESP _ Dry Coil Corrected Corrected 0,06 0,17 0.27 0,38 0,49 0,61 0,72 1455 1418 1373 1320 1260 1193 1118 O.OO O, OO 0,13 0,24 0,36 0,47 0,58 0,70 1637 1601 1558 1506 1447 1380 1305 1223 0,68 O,OO O, OO O,OO 0,21 0,33 0,44 0.56 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 Low 1605 1606 1592 1565 1524 1468 1399 1318 0 0,11 0,21 0,31 0,42 0,52 0,63 0,74 1977 1939 1890 1830 1758 1675 1580 1474 ESP _ Corrected 0,00 1485 EBP Medium ESP_ 0 High 2264 ESP_ 0 Dry Coil 0 2182 0 0,18 0,28 0,39 0,50 0,61 0,72 2095 2003 1906 1805 1698 1586 0 0,26 0,37 0,49 0,60 0,71 ESP 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 Low 1348 1272 1198 1126 1056 988 922 858 O,OO 0,11 0,22 0,83 0,44 0,55 0,65 0.76 1517 1455 1390 1325 1258 1189 1120 1048 ESP _ Med-Low CorrectedESP _ Medium ESP _ Med-High Corrected 0,53 0,38 CorrectedESP Corrected 0.42 704 Medium Corrected 0,30 ESP _ eorrected *60K, C-Cabinet 0,19 753 CorrectedESP Corrected O, O7 ESP _ Dry Coil "48/'49K, C-Cabinet 345 O,O0 ESP _ Corrected B-Cabinet 0.80 408 0,27 Medium "42K, 0.70 463 0,15 High B-Cabinet 0.60 515 793 CorrectedESP "30/'38/'37K, 0.50 583 825 High "24/'25K, B-Cabinet 0.40 807 0,04 CorrectedESP Corrected 0.30 647 849 _ Medium Dry Coil 0.20 683 0,00 CorrectedESP *3OK, 0.10 ESP _ O,OO O, OO 0,19 0,30 0,41 0,52 0.63 0,74 1799 1752 1702 1650 1596 1539 1481 1420 O.OO O, OO O,OO 0,25 0,36 0,47 0,58 0,69 1956 1910 1862 1811 1756 1699 1639 1575 O,OO O, OO O,OO 0,22 0,33 0,44 0,55 0,66 High 2146 2099 2050 2000 1948 1894 1839 1783 ESP_ O,O0 O, O0 O,O0 O,O0 0,29 O,40 O. 51 O,62 ESP estimate with wet coil and filter Notes: 1) 2) 3) Airflow is shown in cfm, +/- 5%. External static pressure (ESP) is shown in inches w.c. See unit nameplate or installation instructions for maximum pressure. Table 3. System Airflow recommended external static Data 15 A-CABINET Switch Number I I B-CABINET Switch Nominal Nominal Capacity Number CFM 1 2 3 411.512.012,513.0 540 0 0 0 1 _ mmmdmlmld 600 o o o o _ 660 o o i o_ 715 iooi_ 790 1 o o ol 870 1 o i ol 915 o i o 11 988 1 1 0 11 1015 0 1 0 o l 1060 0 1 1 o l 1075 1 1 0 o l 1165 1110111 / / I I I I I I _ I _ I _ C-CABINET Switch Number Capacity 0FM72001 _2"53'013"54'(0 2 0 3 1 4 800 o o o o m 85o i 88o 0 948 i i040 i i068 0 1146 i 1206 0 1268i 0 0 0 0 i i i i 0 i 0 i 0 0 0 o i 0 0 0 i i 0 o _ _ I I I I I l I I I I I I I I I I _ _ _ I I l 1326 o,,o II I [] 13_0 i,,o III Nominal Capacity I OFM 1 2 3 413.013.54,015.0 1075 0 0 0 1 1135 1 0 0 1_ 1225 0 0 0 0 _ 1295 1 0 0 0 1380 0 0 1 01 1460 1 0 1 01 iml 11 011 1740 010 01 1860 11 0 ol 196o o I i o l 2090 1 1 1 ol 1525 0 1625 11 1 / I I 0 I I l I l _ _ l [] I [] l [] Note: 1=ON, 0=OFF Table 4. Air Flow Selection when thermostat inputs change, and when the duct static pressure changes (vents closed or opened, filter clogging, etc.). The air handler is configured by setting the selector switches and removing jumper connectors as directed A-CABINET for Variable Speed Models below. IMPORTANT! This air handier has been designed to givethe installer maximum flexibility to optimize system performance, efficiency, and comfort. Because there are so many different ways to set up the air handler it is important to read and follow these directions carefully. Switch Number NominaIKW CFM 0-5 700 0 0 8oo 950 1o 01 1100 1 1 6-9 to-t4 15 1 2 3 4 5 6 7 8 B-CABINET Switch Number NominaIKVV CFM 0-5 700 0 0 6-t0 tt-t5 8oo 950 10 oi 16-20 1100 1 1 Determining Nominal System Capacity--In order to select the appropriate airflows for the air handler the nominal system capacity must be known. The nominal system capacity is always the nominal capacity of the outdoor unit. In some cases the nominal system capacity is not the same as the nominal capacity of the air handler. Always refer to the nominal capacity of the outdoor unit to determine the nominal system capacity. 1 2 3 4 5 6 7 8 Selecting the Basic Cooling/Heat Pump Airflow---The basic cooling/heat-pump airflow is selected by setting switches 1 through 4 on the thermostat input board located on the C-CABINET Switch CFM Switch Number Nominal KW C-CABINET 1 2 3 4 5 6 7 8 0-9 700 0 0. 15-20 950 ttoo 1o o 21-30 1500 1 1 10-14 Delay Description 7 8 No Delay 1 O De-Hum, 1 1 De, o,A De, o,B 1 2 3 4 Number 5 6 00 0, Note: O=Off, 1=On Table 5. Minimum 16 Electric Heat Airflow Table 6. Delay Settings (all models) blower.Allairflowsforothermodesofoperation (exceptelectricheat)are determinedby this basicsetting. Reference Table 5 for recommended minimum electric heat airflow settings. The minimum electric heat airflow setting may be set higher, but must never be set lower than the setting Table4 showsthebasicairflowvaluesversusthe shown in Table 5. airflowselector switchsettings.Table 4alsoshows therangeofbasicairflowsettingsrecommended foreachnominalsystemcapacity. Note:The15+SEERvanablespeedairhandlers thatarematchedwitha 2-stagecoolingoutdoor unit,areprogrammed to operateat 75%of the selectedairflowwhilethesystemisintheIo-cool modeand100%oftheselectedairflowwhilein hi-coolmode. NOTE:TheCFMvalueslistedin thetablesare notdependent onductstaticpressure.The motor automatically compensates forchangesinduct staticpressure(withinthelimitsof themotor). Formaximumcapacityand energyefficiency, select an airflow at or near the top of the rangefor thatnominalcapacity.Formaximum dehumidification,select an airflow near the middleor bottomof the rangefor thatnominal capacity.Additionalinformationon humidity controlcan be foundin the sectionslabeled "Humidistat" and"DelaySetting". NOTE: If coil icing is observed,the basic cooling/heat-pump airflowselectedmaybetoo low.Double-check tobesurethesettingselected iswithinthe rangeshowninTable4.Alsocheck to besurethe systemis properlycharged(see outdoorunit InstallationInstructions).If icing continuesto occur,raisethe selectedairflow oneor twosteps. Selecting the Delay Profile--The delay profile is selected by setting switches 7 and 8 (see Table 6). Delay profile selection controls the start-up and shut-down characteristics of the air handler. By varying the start-up and shut-down characteristics of the air handler the system can be optimized for energy efficiency, humidity control, and comfort. Select "Delay A" or "Delay B" for highest energy efficiency. "Delay A" has a two-step "on" delay. The blower will begin operation at 31% airflow for 30 seconds. The second step operation is 75% airflow for 30 seconds. After the two-step "on" delay has been completed, the blower operation will be 100% until the thermostat has been satisfied. "Delay A" also provides a 60 second "off" delay at 50% airflow. "Delay B" has a single step 30 second"on" delay at 50% airflow."Delay B"also provides a 90 second "off" delay at 50% airflow. Select the delay profile which is most suited to the application. The "De-Hum." delay profile may be used when humidity control is desired without the use of the optional humidistat. If the "De-Hum." delay profile is selected, the air handler will run at 75% airflow for the first 10 minutes of each cooling cycle. If the "De-Hum." delay profile is selected, the basic cooling/heat-pump speed should be selected at or near the top of the range for that nominal capacity (see Table 4). Whenoperatingintheheatpumpmode,ahigher basicairflowsettingwill increasethe energy 8. OPTIONAL HUMIDISTAT efficiencyandcapacitybut will alsodecrease (Variable Speed Only) the supplyairtemperature. Selecting the Minimum Electric Heat A irflow-The minimum electric heat airflow is selected by setting switches 5 and 6. Selecting the minimum electric heat airflow sets the minimum air flow that will be produced whenever electric heater kits are used. When the electric heater kits are energized along with a heat pump, the airflow may be higher depending on the basic cooling/ heat-pump airflow setting. The optional humidistat may be installed in the return air duct to provide excellent humidity control when needed and maximum system capacity and energy efficiency when humidity levels are normal. The humidistat senses when humidity in the return air stream is above a preset level (field adjustable) and sends a signal to the motor to reduce the airflow so that more moisture may be removed until the humidity level drops. The air handler is pre-programmed for humidistat operation. Remove jumper connector installed between the two terminals marked "HUM" on the circuit board. 17 Note: The 15+ SEERair handlersthat are matchedwith a 2-stagecoolingoutdoorunit and the humidistatis installedwill not drop below75%oftheselectedblowerspeedwhen thesystemisoperatingin Io-coolmodeandthe humidistatopens. Installation--Installthehumidistatinthereturn airductasdirectedintheinstallation instructions includedwiththekit.Wirethehumidistat through thelow-voltage wireentranceintheairhandler (Figure1)tothequick-connect terminals marked "HUM".Wirethe humidistatto openon risein humidity. Proper maintenance is most important to achieve the best performance from an air handler. At a minimum, this maintenance should include the following items. 1. 2. 9. CARE AND MAINTENANCE General -- For continued high performance, and to minimize the risk of equipment failure, it is essential that periodic maintenance be performed on this equipment.The ability to properly perform maintenance on this equipment requires certain mechanical skills and tools. If you do not possess these skills, contact your dealer for maintenance. Consult your local dealer as to the availability of a maintenance contract. Do not store any of the following on, or in contact with, the unit: Rags, brooms, vacuum cleaners, or other cleaning tools, spray or aerosol cans, soap powders, bleaches, waxes, cleaning compounds, plastics or plastic containers, paper bags or other paper products, gasoline, kerosene, cigarette lighter fluid, dry cleaning fluids, paint thinners, or other volatile fluids. 18 3. 4. Inspect and clean or replace the air filter at the beginning of each heating and cooling season, or more frequently as required. Inspect the cooling coil, drain pan, and condensate drain at the beginning of each cooling season for cleanliness. Clean these components as necessary using a mild detergent and water. Flush the coil, drain pan, and condensate drain after cleaning to remove all detergent. Use caution when cleaning these components so that the insulation does not become wet. Inspect the blower motor and wheel for cleanliness at the beginning of each heating and cooling season. Clean the motor as necessary. Inspect electrical connections for tightness at the beginning of each heating and cooling season. Service as necessary. Z WARNING: Use caution when removing parts from this unit. Personal injury can result from sharp metal edges present in all equipment of sheet metal construction. 19 iNSTALLER: PLEASE LEAVE THESE iNSTALLATiON iNSTRUCTiONS WiTH THE HOMEOWNER lie llllllMlllllllllllr iIIIll 708709A (Replaces 7087090) Specifications and illustrations subject to change without notice and without incurring obligations. Printed in U.S.A. (07/07)
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