OPERATING AND SERVICE MANUAL
Contents
1. On split units contractor is responsible for interconnection of OBSERVATION PORT components Caulk tape is supplied w unit and applied between on back l sections Recaulk seam after installation is complete P Typical Down Discharge Curb INTAKE INTAKE Mounted Air l Make Up Unit FILTER DAMPER w Electric Coil SECTION Blower Elec opt Access Service Vestibule Access REMOTE PANEL INTAKE HOOD w SERVICE BIRDSCREEN or Typical location for DISCONNECT field supply and remote panel wiring penetrations HOOD FILTER COMBO All components must be caulked to prevent water from entering system Recaulk lift plates after installation Accessories mount with all access doors and damper motors facing same direction as unit access doors Intake damper w indoor units or discharge damper w outdoor units should be mounted at the wall or ceiling inside building Intake dampers on outdoor units mount directly to unit intake w weather shield for actuator Note All main power wiring must be sized and installed in accordance with applicable local state or federal codes Mount CAULKING Indoors Accessories should be supported OR GASKET after installation supports by others MATERIAL DISCHARGE DAMPER by others Note Due to the infinite installation Typical Horizontal possibilities a section of duct or Discharge Tube t2. Address Installing Contractor Signature Fill in numbers and or check applicable items refer to start up procedure PRESTART STATUS HYDRONIC amp DX COOLING COIL OPERATION Supply Voltage L1 L2 Unit Installed Level Supply Voltage L1 L3 Freeze Protection Water Coil Supply Voltage L2 L3 Cooling Control Functional Control Voltage Room Discharge Control Set Point Motor FLA Drain Pan Properly Piped amp Trapped Coil Capacity if applicable Full Flow EDB EWB optional GENERAL OPERATION Full Flow LDB LWE tapuonal Full Flow EWT Suction Temp opt Service Switches Remote Switching Sequencing ELECTRIC HEATING COIL OPERATION Damper Actuator End Switch if Applic Power Source Short Circuit Protection Starter Overload Combination Supply Wire Gauge Blower Rotation Direction Supply Wire Temp Rating Motor Amp Draw L1 Heating Control Functional Motor Amp Draw L2 Max Heat EAT LAT Motor Amp Draw L3 Room Discharge Control Set Point Air Flow Switch FA RA MIXING SECTION OPERATION Low Temperature Safety Freezestat Dampers Drive Properly on Shutdown SETTINGS Damper Controlled Per Sequence Low Temp Safety Time VARIABLE AIR VOLUME OPERATION Low Temp Safety Temp Supply Volume Controlled Properly Motor Overload HYDRONIC HEATING COIL OPERATION Unit Installed Level Freeze Protection Hea
3. FOR START UP Volt Ohm Meter Ammeter Tachometer preferably non contact style Thermometer preferably digital with remote probes and sufficient lead lengths Manometer for checking external static pressure Standard Hand Tools 1 4 TAH OSM Rev 5
4. and drain plugs EON BLOWER Ensure that blower hub is securely fastened to shaft Inspect blower wheel and blades for signs of damage or cracks Clean blades if necessary to maintain proper balance and performance Avoid use of excessive grease on blower bearings that can coat fan blades and attract dirt PLATE FINNED COIL MAINTENANCE Dirty coils will reduce heating and or cooling capacity and restrict airflow All finned coils will require cleaning The cleaning frequency will depend upon the cleanliness of the airstream Use a high powered vacuum compressed air or a mild soap and water solution to clean the coil Specialty coil cleaning products are available Cleaning the header and return bends with soap and water will also provide an initial check for pinholes or cracks that may not be visible Refrigerant leak detectors should be utilized for DX coils Corrosion or deposits on copper or brazed joints may indicate corrosive chemicals in the airstream Baked phenolic coatings should be considered if corrosive chemicals are present Operation of freezestats and control system response to a freezestat trip should be checked prior to each heating season Freeze sprays are available to simulate cold temperature at serpentine element freezestats Traps vacuum breakers vents air eliminators and other piping specialties should be maintained and tested per manufacturer s recommendations If airhandling unit will be shut down for an exten
5. be winterized 4 DISCHARGE DIFFUSER ductwork to discharge diffuser if any is supplied by others Turning vanes are adjusted and secured in the field Diffuser should be supported at 2 points supports by others 5 F A FILTER SECTION gt Larger units have more legs ALL COMPONENT CONNECTIONS MUST BE CAULKED TO Sealant goes between each section optional slides into unit PREVENT WATER before assembly Bolts and caulking bottom section FROM ENTERING are in packing box Recaulk seams SYSTEM and lifting plates after assembly NOTE For indoor units with outdoor air intake the stand will be enclosed sometimes Nut Unit Stand height is increased A transition by others Washer must then be made from enclosed stand intake opening to the intake damper or il Stud mach 1 ouver a size variation may exist Cement Intake damper should be mounted at the building wall or ceiling FIG 1 10 MAINTENANCE As with any piece of equipment or machinery a maintenance program should be implemented Equipment maintenance should include the following Check filters clean or replace as needed Lube bearings Check belts belt tension and sheave alignment Check all hardware bearings blower wheels sheaves etc for tightness Check settings for all controls Check duct connections for leaks Re caulk section joints and seams
6. if needed and inspect access door gaskets Inspect heating or cooling coils and clean if necessary Clean condensate traps and replenish drain pan anti microbial treatment winterize traps seasonally 10 Confirm smooth operation of dampers 11 Go through complete start up procedure once per year oe UP Oe ee Sheave alignment and belt tension are critical to trouble free operation of The Manufacturer equipment Incorrect belt tension or misalignment of sheaves can cause a variety of problems with this type of equipment Refer to next page for associated diagrams 1 Lack of air flow 2 Noise and vibrations 3 Premature failure of blower or motor bearings 4 Premature failure of belts FILTERS Dirty or clogged filters will restrict air flow which in turn affects the equipment performance Therefore it is necessary to check filters on a regular basis Several standard filter types are available including 2 pleated 30 efficient 2 disposable fiberglass 2 linked panel and 1 or 2 cleanable filters Custom filters are available for demanding applications Custom options include bag cartridge carbon and HEPA filters in varying efficiencies Numerous filter rack options are also available Cleanable filters should be removed from the filter rack and sprayed with a power wash system Always spray these filters in the opposite direction to air flow and apply new coating to filters when dry Note that cleanable filters alone may
7. in order to make adjustment Adjust until all 4 points are in contact with the straight edge Repeat on other side of sheaves then re tighten If a face width variation exists measure the difference between each side of the narrowest sheave and adjust until both sides are equal distance from the straight edge BEARINGS Bearings must be checked during each periodic maintenance inspection Bolts and set screws should be checked for tightness and the bearings may need lubrication The following is intended only as a guide to aid you in setting up your own schedule Motor Base Deflection 1 64 Sj Sj co co Figure 1 Straight Edge 1 l 2 3 i 4 l Figure 2 LUBRICATION GUIDE FOR BLOWER BEARINGS Operating conditions Bearing Temp f Grease Interval Clean 32 120 6 10 months 120 150 1 3 months 150 200 1 4 weeks Dirty 32 150 1 4 weeks 150 200 Daily 1 week Moisture 32 200 Daily 1 week 1 2 TAH OSM Rev 5 doc MAINTENANCE MOTOR BEARINGS Motor bearings in a clean environment should be lubricated every 2 to 3 years Under more severe conditions of dirt or moisture lubrication may be required every 6 months to 1 year Typical motor bearing lubrication procedure follows Remove fill and drain plugs Clean drain port of hard grease with wire if necessary Add grease cavity should be no more than 1 full Start motor and let run for 30 minutes Wipe off any drained grease and replace fill
8. not adequately protect a coil from dust and dirt accumulation Filters in an unheated outdoor airstream can freeze up when the humidity is high foggy and temperatures are near freezing Installing pre filters in the outdoor airstream that can be removed during such weather and another set of filters for the conditioned air is one solution if filtration during cold weather is essential IMPORTANT Caulking is required between all parts prior to assembly and seams must be re caulked after assembly Airhandlers shipped in multiple sections will include a high quality caulk tape and caulk tubes Caulk tape is applied between sections with exterior caulking applied after the unit sections have been joined Sealing integrity should be rechecked on a yearly basis 1 1 TAH OSM Rev 5 MAINTENANCE Each Titan Air Handler has as standard equipment an adjustable motor base To adjust the belt tension loosen the motor and hold down bolt and adjust the slide base with adjusting bolt s on the end of the base larger bases will have 2 adjustment bolts Loose belts will slip Excessive belt tension will shorten belt and bearing life Use a belt tension tester and associated tables to determine proper tension Re tension after the first day of operation with new belts and periodically thereafter SHEAVE ALIGNMENT With the use of a straight edge sheave alignment can be made quickly and accurately One of the sheaves will have to be loose on its shaft
9. or use a Suitable anti freeze solution during cold weather Additional steps can be taken to reduce the likelihood of freezing a coil These include 1 Use a pre heat coil with modulating valve forced fully open below a set outside air temperature This is typically accompanied by a reheat coil or face amp bypass dampers to provide supply air temperature control Providing full water flow or full steam pressure to a coil during freezing weather minimizes potential for freeze up 2 Provide a coil loop pump to produce constant flow through the coil with modulation accomplished by varying the percentage of supply water and return water to the coil Providing constant flow with variable temperature instead of variable flow through the coil reduces the opportunity for freeze up 3 Install high quality low leak intake dampers to prevent cold air from settling in the unit during the off cycle 4 Install serpentine element freezestat s to force the unit to a safe condition if the temperature downstream of the first coil drops near freezing for a given amount of time This safe condition typically involves shutting down the airflow and opening the modulating valves If the valve control is provided by others and The Manufacturer supplies a freezestat field installer is responsible for proper control wiring of the freezestat The field installer must ensure that the valve opens on loss of power opens when the freezestat is tripped and opens when
10. d near the space FIELD WIRING Most units will require field wiring Typically field wiring is limited to power supply wiring remote panel wiring and intake or discharge damper wiring Occasionally additional sensor wiring may be required Refer to unit s schematic and legend sheet Low voltage wiring terminals 100 must be run in separate conduit or in shielded cables to prevent noise from affecting the control signals Additionally good practice calls for all DC voltage Sensor and control signals to be shielded or run separate from 24 VAC control wiring Typically remote control panel wiring will sourced from a listed Class 2 transformer Therefore most installations can take advantage of the opportunity to utilize less expensive wiring methods documented in NEC Article 725 Communication wiring for DDC control systems should be wired per DDC manufacturer s recommendations SUPPORT OF ACCESSORIES Most units are supplied with some field mounted accessories i e hood filter section damper The installing contractor is responsible for supporting these items from a solid structure and properly sealing the joint flanges Large twin blower units will often have two piece accessories that must be assembled prior to installation WATER STEAM DX amp AMMONIA COIL INSTALLATION Piping must be sized and installed in accordance with applicable codes and standards Refer to unit name plate for flow and pressure ratings Cooling co
11. ded period during the heating season and there is no means of maintaining airhandler internal temperature above freezing water coils should be drained When coils are drained compressed air must be applied to the vent connection for a complete purge 1 3 TAH OSM Rev 5 START UP GENERAL START UP INFORMATION Even though The Manufacturer equipment is tested prior to leaving the factory a complete field start up is essential to proper operation of the equipment Qualified individuals should perform installation start up and maintenance tasks Remote panel wiring must be tested and heating or cooling capacities should be verified Interconnection with associated equipment must also be verified exhaust fans boilers chillers condensing units valves Every components function should be verified during start up The start up procedure is a good starting point for this check out As the start up states once initial operating checks have been accomplished proper operation per the sequence of operation must be verified Apparent malfunction of a component may be caused by improper supply conditions field wiring errors or other problems unrelated to the component which is apparently malfunctioning The Manufacturer s experience has shown that more than half of all returned components are in full operational condition Please fully inspect possible causes of improper operation prior to ordering parts SUGGESTED TOOLS AND INSTRUMENTS NEEDED
12. e proper operation 9 and 12 forward curved blowers are supported with permanently lubricated ball bearings All other blowers are supported by self aligning relubricatable pillow block bearings 4 TAH OSM Rev 5 GENERAL INFORMATION MOTOR AND DRIVE ASSEMBLIES Open drip proof ODP rigid base single speed 1750 rpm motors mounted on an adjustable base are standard equipment TEFC high efficiency two speed and other motor options are available High quality motor starters and electronic overloads with phase loss protection are also standard items V Belt drive assemblies are selected with a 1 5 service factor Variable pitch driver sheaves are provided on motors up to 30 Hp HEATING COOLING MEDIUM Air Handlers can be equipped with hot water or steam heating coils chilled water cooling coils DX cooling coils ammonia cooling coils and or electric coil heaters These components will typically be certified by accepted industry standard testing agencies Hydronic DX and ammonia coils will typically be ARI 410 certified Electric heating coils will be UL Listed Complete air handlers are ETL Listed to comply with UL Standard 1995 Heating and Cooling Equipment CONTROLS Typically units are equipped with a motor starter and overload control power transformer if a 3 wire system and remote control panel Discharge or space temperature controls may be provided by The Manufacturer or may be field supplied Electric coil heating
13. ed misused or not in compliance with applicable codes or not in accordance with The Manufacturer soperating instructions This warranty is void if attempts to correct or repair any alleged defective part or parts are made by unauthorized personnel without The Manufacturer s written approval In no event shall The Manufacturer be held liable for any damage incidental or consequential arising from the installation performance or operation of the product This warranty supersedes voids and or is in lieu of any other verbal or written understanding which may not be in total accordance with this expressed warranty Warranty parts must be returned to The Manufacturer within 60 days to receive credit PURPOSE APPLICABILITY This manual is intended to provide general installation operating and service information on a specific type of Air Handler A packet of reference materials for a specific unit tracked by its Serial Number is typically included with this Operating and Service Manual The reference materials include Unit Specifications Parts Lists Gas Train and Burner Specifications Electrical Schematic and a Sequence of Operation Review the reference materials for a specific unit and note any optional equipment or controls which are not specifically addressed in this manual prior to attempting start up or service work 1 TAH OSM Rev 5 WARRANTY CHECKLIST Model TAH Serial No Rep Date Job Name Date
14. ed equipment boiler chiller condensing unit INSTALLATION Care taken during the installation and start up is vital to the longevity and reliability of the equipment Refer to typical installation drawings on following pages POSITIONING THE AIR HANDLER Locate the air handler exactly level Minimum clearance requirements to combustible materials are listed on unit name plate Outside air intake hood type and orientation should be chosen to minimize the possibility of drawing snow or wind driven rain The location of exhausts must also be taken into account Allow clearance for service door opening and service personnel access CURB MOUNTING The use of a full perimeter curb or mounting rails under the air handler is recommended The only openings in the roof should be for the supply air duct return air duct if applicable electrical connections and piping if equipment is ordered with optional pipe chase These openings must be sealed properly after installation The Manufacturer ships all curbs broken down and uninsulated Any gaskets cant strips etc are supplied by others Height of the curb is specified when the unit is purchased DUCT WORK Duct work must be sized and installed in accordance with applicable codes and standards Unit flange size is typically smaller than recommended duct size especially on the unit discharge Providing a flange on the duct with an undersized unit flange accommodates minor alignment offsets be
15. having jurisdiction These codes should be reviewed before installation of The Manufacturer equipment It is the responsibility of the purchaser at the time of order to specify any and all State local or insurance agency requirements that may dictate the addition of components to the equipment in order to comply with those requirements Only qualified personnel who have experience with the installation and operation of industrial commercial air handling equipment should attempt to install start up or service The Manufacturer equipment EQUIPMENT ARRIVAL A When the transporter delivers The Manufacturer equipment be sure to inspect for damages The equipment was thoroughly inspected before leaving the factory and the driver has signed for the equipment Read the bill of lading and verify that the items listed are all present Any damage or missing items should be reported to the transporter immediately DO NOT SEND DAMAGED FREIGHT BACK TO THE MANUFACTURER All claims must be filed with the transporter Be sure to take photographs and get the drivers signature to confirm the damage The driver will have a number for you to call in order to file a claim Request a written inspection report from the claims inspector to substantiate any necessary claim Be sure to open the unit access doors and inspect for internal damage If for some reason you are unable to install the equipment immediately be sure that the equipment is protected from the element
16. il piping must be properly insulated up to the coil header inside the airhandler to prevent condensation from dripping outside of the drain pan Some coils are equipped with multiple header connections to allow for universal airflow direction Extra connections are capped in the field Support coil piping independently of the coils Swing joints or flexible fitting may be needed to avoid thermal expansion contraction strains Always use a backup wrench when attaching piping to coils with copper headers Do not overtighten coil connections Piping should be equipped with shut off valves and union fittings to facilitate coil removal Water coil piping is typically arranged to provide counterflow operation supply piping on lower air leaving side of coil and return on upper air entering side Verify that unit is installed level to allow for free draining External vent and drain connections are recommended The interior vent and drain connections on the coil headers can be difficult to access When coils are drained compressed air must be applied to the vent connection for a complete purge Coils must be vented of air on initial start up and each time the coil is re filled This can be accomplished manually or a commercially available hydronic system air eliminator can be installed 7 TAH OSM Rev 5 INSTALLATION Water and steam coils must be protected from freezing if cold outside air moves across the coil Chilled water coils should be drained
17. needed during the off cycle to keep the cabinet warm enough to prevent freeze up 5 Aquastats in water condensate return line can be field provided and function similar to airside freezestat Apply sealant between piping or coil stub and unit casing before applying insulation Failure to provide an air seal may cause capacity or sweating problems inside the unit For cooling coils insulation should be applied to the coil stubs up to the headers inside the airhandler TRAPPING Drain pan connections must be properly trapped Traps on the suction side of a blower must be configured to account for the negative air pressure in the cabinet Standard industry practices regarding trap height depth must be followed Commercially available traps provide visual indication that the trap is open and allow for cleaning Steam coil condensate connections require specialized trapping practices Properly trained technicians must be employed to ensure these requirements are met POST INSTALLATION After installation verify that all joints are secured and sealed including ductwork connections Most of the unit will likely be under a negative pressure when the blower is operating Dirt and moisture can be drawn into the unit Check for water in outdoor units after operation during a rain shower Sealing integrity should be rechecked on a yearly basis Water damaged parts are not covered by The Manufacturer s warranty 8 TAH OSM Rev 5 INSTALLATION
18. ransition may be required for proper Mounted Air accessory mounting These items are Recirculation Unit DISCHARGE the responsibility of others DAMPER Larger Units feature 2 pc accessories Control and need to be assembled supported Q Vestibule and sealed in the field Mixing Box Blower Damper Vestibule Filter Hood w Access Birdscreen Tube mounted unit optional Coil stubs must be sealed to casing and insulated by installing contractor Insulate up to header inside unit also Return Air Duct by others INSTALLATION 100 OUTDOOR AIR SUPPLY UNIT DEPICTED J DISCHARGE BLOWER MOTOR ACCESS DOOR TAH VRH ASSEMBLY 1 Unit BOTTOM see FIG 1 for pad attachment detail 2 Unit TOP blower sec mounts on top of unit bottom see FIG 2 for details Mount so that discharge opening faces building Blower and electrical access doors are on the same end Coil access may be either end 3 DISCHARGE DAMPER optional should be mounted inside the building size variation may exist If located outdoors BLOWER COOLING COIL q SECTION Cooling Coil s Align arrows drain ELECTRICAL HEATING actuator must be covered ACCESS DOOR COIL Built in low leak intake damper CONTROL would provide enhanced freeze SECTION protection Coils and traps must
19. s Water damaged parts are not covered by The Manufacturer s warranty If the equipment is stored for an extended length of time be sure to completely check over the unit for any internal damage which may have been caused by excessive condensation Fully lubricate bearings Also check for any damage caused by rodents and clean dust that may have built up on components CAREFULLY AND THOROUGHLY READ TITAN AIR S PRODUCT WARRANTY B Each unit is tested at the factory prior to shipping Because we are not able to simulate exact field conditions and actual conditions can vary from the order proper field start up is essential For this reason start up by a qualified technician is mandatory The warranty checklist must be filled out while the start up procedure is accomplished This checklist must be returned to The Manufacturer to validate the warranty C For a fee The Manufacturer personnel will travel to the job site supervise the start up and provide operation and maintenance training BLOWERS Air Handlers TAH model line will be equipped with forward curved backward inclined airfoil centrifugal blowers or backward inclined airfoil plenum fans Typically forward curved double width double inlet D W D I blowers are utilized However equipment specifications or application conditions may require a different type of blower All blower wheels are mounted on a solid turned ground and polished shaft that is conservatively sized to ensur
20. ting Control Functional Full Flow EAT LAT Full Flow EWT LWT or Steam PSIG Room Discharge Control Set Point Steam Trap Vacuum Breaker Func NOTES AND COMMENTS 2 TAH OSM Rev 5 TABLE OF CONTENTS Page WARRANTY 1 WARRANTY VERIFICATION CHECKLIST 2 GENERAL INFORMATION 4 gt Equipment Arrival gt Components INSTALLATION 6 gt Installation and Field Wiring Overview TYPICAL ASSEMBLY DRAWINGS 9 MAINTENANCE 11 START UP 14 Unit Specification Sequence of Operation Parts Legend Sheet Schematic Start Up Procedure Troubleshooting optional VVVVVV Note that operating and service manuals are occasionally requested prior to production of a unit These manuals will be marked Pre Production Release on the front cover The final copy of the operating and service manual for a specific unit will be sent with the unit Additional copies of the manual for a specific unit are available A detailed unit specification sheet parts Iegend sheet schematic sequence of operation and start up procedure are provided in the start up section of each operating and service manual generated for a specific unit Selected vendor cut sheets on components will also be included 3 TAH OSM Rev 5 GENERAL INFORMATION The information and recommendations contained in this publication are based on general observation and are not intended to supplant requirements of Federal State or local codes
21. tween unit flange and ductwork For outdoor mounted units the discharge duct should be insulated to prevent condensation during the off cycle in cold weather A fresh air intake hood with bird screen is required For indoor mounted units with through the roof intake a mushroom type intake hood is recommended For louvered wall intakes the intake louver must be sized properly to prevent moisture from being drawn into the ductwork It is recommended that all outside air intake ductwork which is exposed to the heated space be insulated SOUND CONTROL Flexible connectors should be employed on at least one ductwork connection Unit vibration isolators are optional and can be supplied with the equipment for installation by others Internal motor and blower assembly isolation is another option Insulation of all ductwork and proper ductwork amp register sizing will reduce sound levels Blower selection also plays a major role 6 TAH OSM Rev 5 INSTALLATION SENSOR BULB INSTALLATION Depending upon unit configuration the field installer may be responsible for sensor installation s Refer to unit schematic to determine if sensors are field wired Discharge sensor bulbs that are shipped loose should be located far enough downstream of the blower to ensure adequate mixing of the supply air especially important for twin blower units Equipment serving a temperature critical space with a discharge sensor should have the duct air sensor locate
22. units will be equipped with an airflow switch and temperature limits by the electric duct heater manufacturer Numerous standard control packages are available and optional items can be added to these packages For more information regarding these options refer to catalog data or contact a local Representative CABINET The Manufacturer equipment can be provided with a painted or galvanized finish Standard painting process involves the use of galvanealled paint lock sheet metal with an acrylic enamel primer and finish coat Custom painting processes are available to provide enhanced corrosion protection or color matching 16 or 18 gauge gauge sheet metal utilized on exterior sheeting Galvanized or galvanealled sheet metal features a zinc coating weight of G 90 Standard units feature a welded structural steel base Larger units feature a complete structural steel frame All structural steel is coated with a rust inhibitive primer after welding and cleaning 5 TAH OSM Rev 5 INSTALLATION PREINSTALLATION Inspect the equipment making sure that all parts and accessories are accounted for Check equipment against order and packing list If the equipment has been sitting in storage for some time inspect for moisture and or dust accumulation Both can cause damage to electrical components as well as bearings and insulation Verify that electric service matches equipment ratings Verify that heating or cooling medium capacities match associat
23. wl AIR INCORPORATED OPERATING AND SERVICE MANUAL For technical service or repair FIRST CALL INSTALLING CONTRACTOR SECOND CALL Titan Representative XXX YYY ZZZZ FINAL CALL Titan Air Inc 715 597 2050 Please have serial number available when calling WARRANTY 24 MONTH WARRANTY The Manufacturer hereby warrants its products against defects in material and workmanship for a period of 24 twenty four months from date of shipment Warranty sheet is due back within 30 thirty days of start up for 24 month warranty to be effective After 30 thirty days and up until 60 sixty days a 12 twelve month warranty will be observed All warranties are null and void if warranty sheet is not received within 60 sixty days from start up NO EXCEPTIONS WILL BE MADE The Manufacturer reserves the right at The Manufacturer s option to replace or repair free of charge any part proven by The Manufacturer to be defective Prompt notification of defective part must be given to The Manufacturer and defective part must be returned freight prepaid within 30 days of notificaion WARRANTY INCLUDES ONLY PARTS SUPPLIED BY THE MANUFACTURER INCIDENTAL COSTS AND LABOR CHARGES SHALL BE THE RESPONSIBILITY OF OTHERS This warranty does not cover fuses belts filters or water damaged parts This warranty is void in event the product is improperly installed and or operated under conditions other than normal published ratings improperly maintain
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