Lenoxx 41718L098 User's Manual
Contents
1. Li ke m ISTART RELAY 7 i IF USED Lono CRANK CASE HEATER Raa IF USED CONNECT TO C AND Y TERMINALS OF INDOOR CONTROL CIRCUIT HAVING MIN 40 VA 24 VOLT N E C CLASS II TRANSFORMER LINE VOLTAGE FACTORY LINE VOLTAGE FACTORY IF USED LINE VOLTAGE FIELD LOW VOLTAGE FACTORY LOW VOLTAGE FACTORY IF USED LOW VOLTAGE FIELD IF ANY OF THE ORIGINAL WIRE IS REPLACED THE SAME SIZE AND TYPE WIRE MUST BE USED ALT CONTACTOR TO SINGLE PHASE POWER SUPPLY PER RATING PLATE WITH MINIMUM 75 C COPPER WIRE ONLY CIRCUIT PROTECTION PER RATING PLATE SCHEMATIC OF POWER CIRCUIT COMPRESSOR CONTACTOR START RELAY IF USED OUTDOOR POWER SUPPLY CRANKCASE HEATER IF USED COMPRESSOR MOTOR GROUND COMPRESSOR RUN START CAPACITOR IF USED TYPICAL SCHEMATIC OF CONTROL CIRCUIT COMPRESSOR TIME DELAY RELAY CONTACTOR COIL IF USED 417181 098 DISCHARGE THERMOSTAT IF USED THERMOSTAT TERMINALS Figure 4 LOW PRESSURE SWITCH IF USED HIGH PRESSURE SWITCH IF USED PART NO 38602D008 Page 7 Limited Warranty August 1 1997 This warranty gives you specific legal rights and you may have other rights which vary from state province to state province Warrantor Armstrong Air Conditioning Inc 421 Monroe St Bellevue OH 44811 Armstrong Air Conditioning Inc2. 1 Operate the unit for a period of at least 15 minutes to allow for pressures and temperatures to stabilize Unless matched with an indoor section using an expansion valve the superheat method can be used to check the system refrigerant charge It should be noted that this method is not accurate at low load conditions or at outdoor ambients above 106 F 2 Using accurate gauges and temperature measuring devices determine the suction line pressure and temperature as well as the outdoor ambient tempera ture 3 Refer to the refrigerant charging instruction label located on the inside of the outdoor unit access panel Locate the intersection of the measured outdoor temperature and suction line pressure on the chart 4 Ifthe suction line temperature is higher than the intersection temperature the system is undercharged If the actual suction line temperature is lower than the chart temperature the system is overcharged Discharge Thermostat if used Some models come equipped with a discharge thermostat loss of charge control to guard against the compressor overheating from loss of charge The temperature cut out for this control is set at 250 F as determined by compres sor manufacturer s recommendation Discharge tem peratures exceeding 250 F will cause compressor oil breakdown that will lead to premature compressor failure If the control trips during unit operation a problem exists within the system Check for the foll
3. products are available under the following names Air Ease Armstrong Air American Aire Concord Subject to the limitations stated in this warranty we warrant to the first buyer for use the residential heating cooling or heat pump unit when installed operated and maintained as required by this warranty to be free of defects in workmanship or material for a period of five years two years for commercial equipment from the time of installation We will replace any defective component without cost or expense to you except for the costs of delivery and labor for removal and replacement of the defective component The SCU 12 13 and E Series carry a 10 year compressor warranty All other SCU Series air conditioners carry a 5 year compres sor warranty Warranty Begins The warranty period begins when the installation is complete and the product is ready to operate You must be able to verify this date whenever a warranty claim is made Original bill of sale installer s invoice or other similar document will suffice If the beginning date cannot be verified we will consider warranty coverage to begin six months after the date the product was shipped from our factory Limitations on Implied Warranties Implied warranties of merchantability or to the extent applicable fitness for a particular purpose are limited to five years the same duration as the basic limited written warranty provided herein Some states provinces do not allow limitations on ho
4. POWER SUPPLY THERMOSTAT _ 7 INDOOR UNIT NEC CLASS 1 WIRING TO NEC CLASS 2 WIRING Seger SEAL OPENING S WITH PERMAGUM OR EQUIVALENT Route tubing to fittings on the outdoor unit vapor and liquid service valves using properly sized refrigerant grade tubing Run the refrigerant tubing in as direct a path as possible avoiding unnecessary turns and bends Ensure that the vapor line is insulated properly and that both vapor and liquid lines are not in direct contact with floors walls ductwork floor joists or other piping After wrapping the service valves with a wet rag braze the tubing to the valve connections After brazing the tubing connections at the indoor coil leak test the refrigerant tubing and indoor coil Following the leak test evacuate the indoor coil and line set to a minimum of 500 microns to remove contamination and moisture After evacuation open both the vapor and liquid service valves fully Page Factory charge contains refrigerant for condenser evapo rator and 20 feet of 3 8 line set For line set other than 20 feet adjust charge at 0 60 oz per foot of 3 8 o d liquid line and 1 2 oz per foot of 1 2 To obtain optimum performance system charge should be weighed in accordance to amount specified on unit rating plate and any adjustments for additional line length over 20 feet as stated above System performance may be verified by using the refrigerant chargin
5. INSTALLATION AND MAINTENANCE INSTRUCTIONS SCU Series Split System Air Conditioner A WARNING The equipment covered in this manual is to be installed by trained and experienced service and installation technicians Improper installation modification service or use can cause electrical shock fire explosion or other conditions which may cause per sonal injury death or property damage Use appropriate safety gear including safety glasses and gloves when installing this equipment AWARNING Risk of electrical shock Disconnect all remote TABLE OF CONTENTS power supplies before installing or servicing any portion of the system Failure to discon INSTALLATION nect power supplies can result in property damage personal injury or death START UP MAINTENANCE AWARNING Installation and servicing of air conditioning WIRING DIAGRAMS equipment can be hazardous due to internal refrigerant pressure and live electrical compo WARRANTY nents Only trained and qualified service personnel should install or service this equip ment Installation and service performed by Manufactured By unqualified persons can result in property A A C damage personal injury or death A Lennox International Company 421 Monroe Street Bellevue OH 44811 AWARNING Before performing maintenance operations on system turn off all main power switches to indoor and outdoor units Turn off accessory heate
6. WITCH 48 OVERHEAD CLEARANCE 12 CLEARANCE AA NAMEPLATE A LOCATION 24 SERVICE ACCESS CLEARANCE gt 12 CLEARANCE BOTH SIDES NOTE ALL OUTDOOR WIRING MUST BE WEATHERPROOF Figure 1 Refrigerant Piping Connections Check the indoor piston orifice to see if it matches the required piston for the indoor and outdoor combina tion being installed Refer to the refrigerant charge label located on the inside of the outdoor unit access panel for the correct piston orifice size requirements Replace the piston orifice with the correct size if this size is not already installed in the indoor coil For optimum system performance indoor coils should be washed with a suitable detergent to remove any residue from the coil manufacturing processes Refer to the following instructions when making the refrigerant piping connections 1 The unit has been factory charged with refrigerant R22 suitable for a matched indoor coil and 20 feet of properly sized refrigerant tubing Refer to the unit rating plate for the exact amount of this factory charge 2 Refer to the refrigerant charge label located on the inside surface of the outdoor unit access panel Locate the outdoor and indoor models being installed and note any refrigerant adjustments that must be made to the system Adjustments to the system charge must also be made if an interconnecting line set other than 20 feet is installed 417181098 TO
7. g labels provided with each unit In air conditioning systems horizontal suction lines should be slightly sloped toward the condensing unit Piping must avoid dips or low spots can collect oil To aid in the return of oil a trap should be installed at the bottom of any suction riser The top end of the riser must be pitched Suction Line Sizes LINE SET LENGTH AND SIZE su arr or or ear pol noel oe ve e re oe re Table 2 toward the compressor For long vertical risers additional traps are recommended for each additional 20 feet of pipe to insure proper oil movement A crankcase heater is recommended for applications where additional field added charge results system with a reciprocating compressor requiring more than 6 Ibs of refrigerant or a scroll compressor requiring more than 10 Ibs of refrigerant Liquid Line Sizes LINE SET LENGTH AND SIZE su ae ror ae re oe oe oo now son oe oon om Table 3 For installations exceeding 100 feet contact the Armstrong Air Conditioning Inc Technical Services Department at 419 483 4840 Page 4 417181098 START UP The procedure for start up of the unit is as follows
8. owing as possible causes e Low system charge e High discharge pressures A thorough inspection of the system should be made to determine the cause The discharge gas temperature may be verified by attaching an electronic type thermometer or thermocouple to the discharge line near the control The control resets automatically If the unit does not have a discharge thermostat an add on kit is available 417181098 MAINTENANCE AWARNING Before performing maintenance operations on system turn off all main power switches to indoor and outdoor units Turn off accessory heater power switch if applicable Electrical shock could cause personal injury or death Homeowner Maintenance Leaves and other large obstructions should be carefully removed from the outdoor coil surfaces without damaging the fin surface of the coil Routinely clean or change the indoor air filter Should the coil become dirty thus restricting airflow call a qualified service person to carefully clean the coil surface Dealer Maintenance An annual inspection by a qualified service person should be performed to ensure continued quality performance Outdoor coil surfaces should be cleaned taking care not to damage the fin surface of the coil Several weep holes located in the unit base should be inspected and cleaned if necessary to ensure that proper drainage can occur All electrical wiring and connections should be inspected a
9. r power switch if applicable Electrical shock could cause personal injury or death 41718L098 Save these instructions for future reference Page 1 INSTALLATION General Read this entire instruction manual as well as the instructions supplied in separate equipment before starting the installation Observe and follow all warnings cautions instructional labels and tags Failure to comply with these instructions could result in an unsafe condition and or premature component failure These instructions are intended as a general guide only for use by qualified personnel and do not supersede any national or local codes in any way The installation must comply with all provincial state and local codes as well as the National Electrical Code U S or Canadian Electrical Code Canada Compliance should be determined prior to installation This unit has been factory charged with a quantity of refrigerant R22 sufficient for a matched indoor coil and 20 feet of refrigerant tubing If installed with other indoor sections or with tubing sets other than 20 feet in length adjustments to the total system charge must be made This outdoor unit has been ARI rated with several Arm strong matching indoor sections for various types of installations To obtain optimum performance a matched indoor section must be installed ARI ratings are based on properly charged systems running at rated indoor cfm levels Ductwork should be specified to ins
10. s should all physical connections of individual compo nents within the units Page 5 CONNECTION DIAGRAM FAN EQUIPMENT GROUND LINE VOLTAGE FACTORY CAPACITOR LINE VOLTAGE FACTORY IF USED LS LINE VOLTAGE FIELD LOW VOLTAGE FACTORY LOW VOLTAGE FACTORY IF USED LOW VOLTAGE FIELD NOTE REPLACEMENT WIRE MUST BE THE SAME GAGE AND INSULATION THICKNESS 105 APPLIANCE WIRING MATERIAL 1d ya Pe re SK REFER RATING IF USED Y TERMINALS OF HEATER PLATE FOR LINE INDOOR CONTROL IF USED VOLTAGE 3 PHASE CIRCUIT HAVING MIN POWER SUPPLY USE 40 VA 24 VOLT N E C MINIMUM 75 C CLASS II TRANSFORMER COPPER WIRE ONLY DISCHARGE HIGH PRESS THERMOSTA SWITCH IF USED PEE CIRCUIT OUTDOOR POWER SUPPLY COMPRESSOR CONTACTOR CRANKCASE HEATER IF USED COMPRESSOR MOTOR TYPICAL SCHEMATIC OF CONTROL CIRCUIT COMPRESSOR HIGH PRESSURE CONTACTOR COIL DISCHARGE THERMOSTAT SWITCH IF USED IF USED THERMOSTAT TERMINALS PART NO 38942D005 Page 6 Figure 3 41718L098 CONNECTION DIAGRAM START CAP IF USED OT Oo DISCHARGE HIGH PRESSURE l SWITCH THERMOSTAT IF USED LOW PRESSURE it SWITCH A OE Cc LOAD TSTAT IF USED TIME DELAY RELAY IF USED puss ee ee
11. sion of vibration the pad should not be in direct contact with any building walls or foundations This unit has been designed to be located outdoors with sufficient clearance for free entrance to the inlet and discharge air openings Adequate service clearance must also be provided Refer to Figure 1 for a detailed descrip tion of minimum clearances Position the unit to avoid direct contact of water snow or ice from a roof line overhead Avoid placing the unit near quiet areas such as sleeping quarters or study rooms Normal operating sound levels may be objectionable if the unit is placed near certain rooms Electrical Wiring All field wiring must be done in accordance with the National Electrical Code recommendations Canadian Electrical Code and CSA Standards or local codes where applicable Refer to the unit rating plate for information needed for wire sizing and branch circuit protection An adequately sized branch circuit disconnect should be installed per the NEC within sight of and readily acces sible to the unit Route properly sized copper conductors from the disconnect to the unit high voltage connections at the contactor A properly sized ground wire must be connected to the ground screw or wire located in the control panel Two low voltage thermostat wires must be connected to the yellow wires connected to the contactor coil Use copper conductors only 417181098 Minimum Clearances WEATHERPROOF DISCONNECT S
12. t have been moved from their original place of installation Warranty on Replacement Components Any replacement component furnished by us will assume the remaining unused portion of the Limited Warranty Consequential Damages The warrantor shall not be responsible for any consequential damages caused by any defect in the product Some state provinces do not allow the exclusion or limitations of incidental or consequential damages so the above limitation or exclusion may not apply to you NOTE After the first year in the event that a gas or oil heat exchanger is no longer being manufactured by the warrantor the warrantor will allow a credit equal to the then current wholesale price of an equivalent heat exchanger towards the purchase of a new Armstrong gas or oil furnace This product must be installed used and cared for in accordance with the instruction manual You are responsible for required periodic maintenance or service such as changing or cleaning of air filters and lubrication or cleaning of components Failure to properly install operate or maintain your unit voids this warranty Owner Record Model Serial Installation Date INSTALLED BY Dealer Address Telephone License Page 8 417181098
13. ure the correct indoor airflow is obtainable Inspection of Shipment Upon receipt of equipment carefully inspect it for possible shipping damage If damage is found it should be noted on the carrier s freight bill Take special care to examine the unit inside the carton if the carton is damaged Any concealed damage discovered should be reported to the last carrier immediately preferably in writing and should include a request for inspection by the carrier s agent If any damages are discovered and reported to the carrier DO NOT INSTALL THE UNIT as claim may be denied Check the unit rating plate to confirm specifications are as ordered Limitations This unit is designed and approved for outdoor use only The outdoor unit must not be installed with any ductwork in the airstream The outdoor fan is not designed to operate against any additional static pressure Page 2 The unit has been designed to operate within the range of indoor and outdoor temperatures as outlined in Table 1 Following these recommendations will minimize compo nent failures and maximize system performance Optimum Temperature Range 65 F minimum to 115 F maximum indoor 62 F db 57 F wb to 90 F db 72 F wb If extended run times are anticipated below outdoor temperatures of 65 F a low ambient kit must be installed Table 1 Location of Unit Install the unit on a solid level mounting pad To minimize transmis
14. w long an implied warranty of merchantability or fitness lasts so the above limitations or exclusions may not apply to you Only Warranty This written Limited Warranty is the only warranty made by the warrantor this warranty is in lieu of and excludes all other warranties express or implied The warrantor does not authorize any person to provide any other warranty or to assume for it any further obligation in connection with the warranted product What is NOT Covered Cabinets or cabinet pieces Normal maintenance items such as filters fan belts fuses or other consumable items Damage caused by misuse failure to maintain properly accidents or acts of God External wiring piping venting or attachment of accessory products not integral to our product including without limitation humidifier air cleaner vent damper thermostat or other mechanical devices not manufactured by the warrantor Products that have been operated in a corrosive atmosphere where a concentration of acids halogenated hydrocarbons or other corrosive elements causes deterioration to metal surfaces or integral components NOTE Operation in a corrosive atmosphere is considered abuse and voids this warranty Products that have NOT been installed in accordance with our published installation instructions applicable local state provincial or national codes ACCA published standards Products that have NOT been installed by competent qualified installers Products tha
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