Greenheck Fan Outdoor Air Ventilator User's Manual
Contents
1. Motor voltage incorrect Check motor nameplate and supplied voltage Motor horsepower too low Shorted windings in motor Unit damper not fully open See specifications and catalog for fan curves to determine if horsepower is sufficient Replace motor Adjust damper linkage or replace damper motor System static pressure too high Improve ductwork to eliminate losses using good duct practices Blower speed too low Check for correct drives and RPMs with catalog data Dampers or registers closed Open and adjust Dirty or clogged filters Clean or replace Leaks in ductwork Repair Elbows or other obstructions may restrict fan outlet Correct or improve ductwork Belt slippage Blower fan speed too high Adjust belt tension Check for correct fan RPM Filter s not in place Install filters Insufficient static pressure SP airflow resistance Wheel rubbing on housing Induce SP into system ductwork Center wheel Loose wheel on shaft Tighten wheel setscrew Loose motor or blower sheave Tighten sheave setscrew Belts too loose Adjust belt tension after 24 hours of operation Belts too tight Loosen to maintain 3 8 deflection per ft of span between sheaves Worn belt Replace Motor base or blower loose Tighten mountings bolts Worn bearings Replace Bearing and drive alignment Realign Motor2. and support arrangement The following notes and figure 1 page 15 are recommended for the coil unit installation and operation General 1 Provide separate supports and hangers for the unit and the piping 2 Be certain that adequate piping flexibility is provided Stresses resulting form expansion of closely coupled piping and coil arrangement can cause serious damage 3 Standard steam coils are pitched in the casings when installed for horizontal air flow The CASING MUST BE LEVEL after the unit is installed for proper condensate drainage If condensate is not removed the coil will suffer from water hammering and will have a shortened life On vertical air flow applications the coils must be pitched when installed 4 Do not reduce pipe size at the coil return connection Carry return connection size through the dirt pocket making the reduction at the branch leading to the trap 5 It is recommended that vacuum breakers be installed on all applications to prevent retaining condensate in the coil Generally the vacuum breaker is to be connected between the coil inlet and the return main The vacuum breaker should be open to the atmosphere and the trap design should allow venting of large quantities of air 6 Do not drip supply mains through the coil 7 Do not attempt to lift condensate when using modulating or on off control 8 Do not reduce the pipe size leaving the coil Traps 1 Size traps in accordance with the manufacturer
3. discharge ductwork installed Hanging support structure for unit is by others Installation Instructions for NV 45 w Downblast Discharge Before beginning this installation Make sure that there is room to access the unit from all sides Make sure inlet of unit is located well away from any exhaust fans For Installations using rectangular curb Roof Rectangular Opening Curb g a ay Footprint B z a A C Determine equal dimension for these 3 locations d G Step 2 Install Roof Curb and Equipment Support Step 1 Roof Opening Determine the center of the supply duct roof opening The chart below shows the maximum recommended roof opening dimensions These sizes can be smaller based on codes and ductwork sizes A Max Roof Open Sq 47 Supply Duct to Equip Support 881 2 For rectangular curbs center curb on 3 sides of roof opening as shown in above installation diagram by determining C dimension varies per unit curb size For either installation level the curb and shim if necessary Attach curb to roof and flash in place If equipment support is needed refer to chart in step 1 for dimensional location based on NV unit size Attach to roof in the same manner as the curb Remove metal cover flash to wooden nailer and reinstall cover Recommended Supply Ductwork Sizes oT Straight Duct Duct Size Length pao Supply Ductwork by Others Duct A
4. s recommendations Be certain that the required pressure differential will always be available DO NOT UNDERSIZE 2 Float and thermostatic or bucket traps are recommended for low pressure steam On high pressure systems bucket traps are normally recommended The thermostatic traps should be used only for air venting 3 Bucket traps are recommended for use with on off control only 4 Locate traps at least 12 inches below the coil return connection Controls 1 On high pressure installations a two position steam valve with a face and bypass arrangement is preferred where modulating control is required 2 Modulating valves must be size properly DO NOT UNDERSIZE Freezing Conditions Entering air below 35 F 1 5 PSI steam must be supplied to the coil at all times 2 Provision should always be made to thoroughly mix fresh air and return air before it enters the coil on return air units Also temperature control elements must be properly located to obtain true air mixture temperatures 3 As additional protection against freeze up the trap should be installed sufficiently far below the coil to provide an adequate hydrostatic head to ensure removal of condensate during an interruption in the steam pressure Estimate 3 feet for each 1 PSI of trap differential required 4 Onstart up admit steam to coil ten minutes before admitting outdoor air 5 Provision must be made to close fresh air dampers if steam supply pressure falls below min
5. cfm should be measured and compared with its rated air volume This unit is flexible for varying air volume units above 15 Hp may have fixed drives but the actual air volume should be known for making final adjustments The most accurate way to measure the air volume is by using the pitot traverse method in the ductwork away from the blower Other methods can be used but should be proven and accurate To adjust the air volume change the fan RPM or the system losses See Trouble Shooting Section in this guide Measure Motor Voltage Amperage and Fan RPM All access doors must be installed except the control center door Measure and record the input voltage and motor amperage s To measure the fan RPM the blower door will need to be removed Minimize measurement time because the motor may over amp with the door removed With blower door in place compare measured amps to the motor nameplate full load amps and correct if overamping See the trouble shooting section in this guide 5 Settings for Optional Components Freeze Protection This de energizes the blower if the output temperature is below the set point A timer allows the blower to operate during startup This will reset when turned off Typical settings are Discharge temperature 35 F Timer 5 minutes Instructions for Coils Steam Coils Application Recommendations Satisfactory operation and service life are best ensured when coils are installed with proper piping trap
6. outlet is provided a separate power supply must be provided to the receptacle This circuit must be on a ground fault breaker CAUTION Any wiring deviations may result in personal injury or property damage Greenheck is not responsible for any damage to or failure of the NV unit caused by incorrect final wiring SYSTEM STARTUP For proper unit function and safety follow everything in this startup procedure in the order presented This is to be done after the electrical connections are complete e Voltage meter e Incline manometer or equivalent Special Tools Required e Tachometer e Thermometer e Amperage meter 1 Check Voltage Before starting the unit compare the supplied voltage with the unit s nameplate voltage and the motor voltage 2 Check Blower Rotation First hand rotate the blower to ensure that the wheel is not rubbing against the scroll If the blower is rotating in the wrong direction the unit will move some air but not perform properly To check the rotation open the blower access door and run the blower momentarily to determine the rotation To reverse the rotation turn the power off and use the following procedure e For single phase units rewire the motor per the instructions on the motor e For three phase units interchange any two power leads This can be done at the motor starter Blower Housing Air Volume Check and Measurement Along with the building balance the units air volume
7. washable filters are installed they can be washed in warm soapy water An adhesive spray can be applied to increase filter efficiency If disposable filters are installed check by holding up to a light source If light cannot pass through the filter it should be replaced Replacement filters should be of the same manufacturer and size When reinstalling filters be sure to install with the airflow in the correct direction indicated on the filter and with any factory spacers that came with the unit Yearly All bearings on units 108 to 118 are permanently lubricated and require no further lubrication under normal use Normal use being considered 20 F to 120 F and in a relatively clean environment Units from sizes 120 to 220 should be checked monthly for lubrication Motor maintenance is generally limited to cleaning and lubrication where applicable Cleaning should be limited to the exterior surfaces only Removing dust and grease buildup on motor housing assures proper motor cooling Greasing of motors is intended only when grease fittings are provided Many fractional motors are permanently lubricated and require no further lubrication Motors supplied with grease fittings should be greased in accordance with manufacturer s recommendations When motor temperature does not exceed 104 F 40 C the grease should be replaced after 2000 hours of running time as a general rule Wheels require very little attention when moving clean air Occas
8. Part 457502 Installation Operation and Maintenance Instructions for Neutralizer 100 Outdoor Air Ventilators hs at is i WARNING Improper installation adjustment alteration service or maintenance can cause property damage injury or death Read the installation operating and maintenance instructions thoroughly before installing or servicing this equipment This manual is the property of the owner and is required for future maintenance Please leave it with the owner when you complete the job GREENHECK P O BOX 410 SCHOFIELD WISCONSIN 54476 0410 PH 715 359 6171 June 1998 TABLE OF CONTENTS Warranty ssssansnsiunnn nunnia mn a a m a a n a a m a a i i a Pg 2 Installation Instructions NV 45 o Horizontal Discharge ssisscssiscseassvsasneseteusinsdasecuansssseseiessiecanewcuesestisaeeeneereseese Pg 3 D ownblast DISCH ANG sasiessnenecscaisessciscscaiidsivenietststaevassesisesicndlcadvasucesestin Pg 4 5 NV 90 and NV 120 e Slab Rail Curb InStallatiOMrasisssccssesstnnscsssestssesssecsserstennsssstneecssseesese sien Pg 6 7 e Equipment Supports Discharge Locations sscsssecesesesesenenenenenenenenenenenenen Pg 8 Curb Installation scisssisstatasssssannssersacassasdatersersaaisseseamsrsnrsanissdbvadiesiriasnsas Pg 9 11 e Installing Filter Coil Section and Weatherhoo d 11s1s0sesesesesenenenenenens Pg 10 11 Electrical TSUMICtION Siicsscpeciesccceasctecsncdoncasenecismedectadsnacscsncascussesduaccass
9. al support is not needed Follow the guidelines below for determining the coil section support required Page 18 lists unit weights for equipment support load requirements Equipment Support Requirements Slab Rail Mount Curb Mount NV 90 None Curb Height T NV 120 12 Curb Height 12 we ee wee ae SN Coil Section g ZA lt Typical NV 120 installation on cement slab with optional up stream heating coil section See page 10 for attachment instructions Equipment Support Cement Slab 5 Attach Ductwork to Unit Discharge Chart and drawing below show opening size ID and location for discharge collar Also included is the recommended straight duct lengths for optimal performance Greenheck recommends attaching ductwork using a rubber duct section at the unit to eliminate vibration D ii C gt Discharge Opening Sizes Straight 7 E E D Duct Length NV 90 161 4 24 341 2 223 8 81 B NV 120 161 4 251 2 34 231 4 96 ps A Back View NV 90 and NV 120 Installation Instructions for CURB MOUNTING For installations using Greenheck s NV 90 and NV 120 optional roof curb 1 Assemble Roof Curb Curbs are shipped knockdown and require assembly by others Assembly instructions are also included with curb Assemble curb sections as shown using hex bolts and lock nuts supplied with curb Detail sho
10. daptor Ductwork Step 3 Install Ductwork The chart shows at left shows the duct sizes and straight lengths recommended for optimal performance AMCA Publication 201 90 Using duct sizes less then recommended lengths will affect fan performance Good duct installation practices should be followed for the remaining ductwork The use of a duct adapter with the supply duct is strongly recommended to properly align the ductwork with the supply fan discharge The duct adaptor is only a guide and is not intended to be used as support for the ductwork Step 4 Apply Sealant Before installing unit apply a sealant or a gasket around the perimeter of the supply duct adaptor to isolate the fan and minimize vibration Step 5 Install Supply Unit Use a crane and a spreader bar Lifting Lugs hooked to the factory lifting lugs places as shown in the diagram to lift eaaren and center the NV unit on the Supply Unit curb and equipment support Use self tapping sheet metal screws to fasten unit to the curb and equipment support through holes provided Electrical and pipes connections can be made at this time Complete Installation Illustration shows the complete installation of downblast NV with filter section and weatherhood Installation Instructions for A GR EENHE CK SLAB RAIL AND CURB MOUNTING NV 90 and NV 120 w Horizontal Discharge Before beginning this installation Make sure that there is room to access the unit f
11. e provided as shown in illustration It is highly recommended that all accessory items be lifted separately and attached after the unit is in place Electrical and pipe connections can be made at this time lifting lugs as shown in diagram to lift and center the filter section on the NV unit Note that the top U shaped flange on the filter section fits over the vertical flange of the NV unit see detail A Use sheet metal screws to fasten the filter section to NV unit Mounting holes are prepunched see diagram for approximate hole locations Filters ship separately To install remove side panel on filter section and slide into filter channels Note arrows on filters for correct orientation Spreader Bar LiftingLugs 2 Detail A KSU Unit Filter Coil Section j pee O Fasten through ae both flanges M Butt units together Note If the optional up stream heating coil section is included with the unit special support for this section is required See page 8 for requirements Filter Coil section fastener locations typical for entire section Top fasteners are accessed from outside side fasteners are accessed from inside bottom fasteners are accessed from underneath filter section Note bottom fasteners are not required for slab mounted units Spreader Bar gt Lifting Lugs 2 _ A 8 Attach Support Legs Support Legs 2 Support Legs are requir
12. ed on weatherhood section Attach through pre punched holes in weatherhood using supplied fasteners 7 Attach Weatherhood Use a crane and spreader bar hooked to factory lifting lugs as shown in diagram to lift and center the weatherhood on the filter section same procedure as shown in previous step If there is no filter section the weatherhood attaches directly to NV unit in same manner Fastener instructions are same as Step 6 Weatherhood fastener locations typical for entire section Top fasteners are accessed from outside side and bottom fasteners are accessed from inside 9 Install Birdscreen or Optional Weatherhood Filters i z FEES Install 1st Install last Install 2nd slide to side lt lt slide to side Birdscreens simply slide up and into opening resting on channels Install side screens first and slide to edges of unit Install center screen last No fasteners are required Filters simply side down into filter tracks as shown No fasteners are required Note arrows on filters for correct airflow Electrical Instructions Before connecting power to the unit read and CAUTION understand the following instructions and wiring diagrams Complete wiring diagrams are attached inside the door s of the unit If any of the original wire must be replaced the replacement wire must have a tempera
13. eseuesmssseaseas Pg 12 Syst m StartUp iiinn a aaa aaa Pg 13 Coil INStrUCtONS sssss12222 555215210200000unnnnnnnnnnnnnnnnnn Pg 14 16 Trouble Shooting sssss2n222 2 555121010020uunn nnn Pg 17 General Dimensions and Weights cscscseeceeeeseeceeeeseeeseeeeneseeeeeeeneeeeeseeaeeeanenans Pg 18 MAINEGN ONG G eciieesisticncenecancedecetnmnswenenensseadasnsasbecedenansstcautantnawenedenenedenasousuatackiansastede Pg 19 Maintenance NOLES iiiicicisssesicctnaaacdeecseiantnccntacdacniccnasasneiaunaandesccassaduacasucscasebuasane Pg 20 Warranty Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the purchase date Any units or parts which prove to be defective during the warranty period will be repaired or replaced at our option The motor is warranted by the motor manufacturer for a period of one year Should the motor prove defective during this period it should be returned to an authorized motor service station Greenheck will not be responsible for any installation or removal costs Due to continuing research Greenheck reserves the right to change specifications without notice 2 Installation Instructions for NV 45 w Horizontal Discharge 2 N A Equip Support 441 4 Step 1 Mounting the Unit 5 Arrangement HZ can be mounted on a curb Srei T Es with an equipment support see curb
14. fins or high fin density foaming chemical sprays and washes air available Many coil cleaners contain harsh chemicals so they must be used with caution by qualified personnel only Care must be taken not to damage the coils FINS ARE SHARP Use caution when working with coils 2 Drain pans in any air conditioning unit will contain moisture therefore algae and other organisms will grow due to airborne spores and bacteria Scheduled cleaning is necessary to prevent build up from clogging the drain The drain pans should also be kept clean to prevent growth of bacteria and the spread of disease Winterizing Coils During any extended down time all water should be drained from the coil The coil should then be thoroughly flushed with a glycol solution to prevent freeze damage Symptom Blower fails to operate Motor overamps Insufficient airflow Too much airflow Excessive noise or vibration TROUBLE SHOOTING Blower Unit Possible Cause Blown fuse or open circuit breaker Corrective Action Replace fuse or reset circuit breaker and check amps Broken fan belt Replace Defective motor or capacitor Replace Motor starter overloaded CFMs too high Reset starter and check amps Check CFMs and adjust drives if needed Static pressures are higher or lower than design If higher ductwork should be improved If lower fan RPMs should be lower Blower rotation is incorrect Check rotation and correct
15. imum specified Gate Valve Control Valve Modulating Two Position 1 Check Valve Vacuum Breaker Float and Thermostat Trap bs Strainer Greenheck does not supply coil controls all control elements shown are supplied by others Figure 1 Recommended Steam Coil Piping Direct Expansion Coils Application Recommendations 1 Piping should be in accordance with accepted industry standards 2 The condensate drain pipe should be sized adequately to ensure the condensate drains properly The bottom of the drain pan should be twice the distance of the internal static pressure water column above the exit of the trap 3 When connecting suction and liquid connections make sure the coil is free from all foreign material Make sure all joints are tight and free of leakage 4 Greenheck does not supply compressor or condensing units for further instruction on DX coil installation and operation contact your compressor and or condenser manufacturer Water Coils Application Recommendations 1 Piping should be in accordance with accepted industry standards 2 Connect the WATER SUPPLY TO THE BOTTOM CONNECTION on the air leaving side and the WATER RETURN TO THE TOP CONNECTION on the air entering side The extra bottom connection can be used for an auxiliary manual drain connection and the extra top connection can be used for an automatic air vent or the extra connections can be capped Connecting the supply and or
16. inst or Footprint io ie 2 on three equipment supports figs 1 amp 4 m i aen Be Arrangement HZ can also be used for indoor lt lt a T 7 es applications mounted hanging fig 5 inline a Rs na as part of an air handling system or base a ed A A mounted Mounting hardware to be provided fig 1 eee 2 R by others In any case adequate support of the unit is required Step 2 Attach Ductwork to Unit Discharge Chart and drawing fig 2 below shows opening size ID and location for a discharge collar Also included is the recommended straight duct length for optimal performance Greenheck recommends attaching ductwork to collar using a rubber duct section at the unit to eliminate vibration Recommended Duct Size Location and Intake Dimensions Minimum Straight Duct Length 54 Typical Installations Step 3 Attach Ductwork to Unit Intake For non weatherhood installations fig 3 below shows dimensions for supply opening ID Attach ductwork to perimeter flange using a rubber duct section at the unit to eliminate vibration Design the remaining ductwork for minimal losses to allow the unit to operate properly onl 48 gt ees LT Z fig 2 fig 3 Roof mounted arrangement HZ with weatherhood mounted on three equipment supports Ductwork is attached to discharge collar with rubber boot transition Arrangement HZ shown as an indoor hanging installation with intake and
17. ionally oil and dust may accumulate on the wheel causing imbalance When this occurs the wheel and housing should be cleaned to assure smooth and safe operation Routinely check all fasteners for tightness 19 Maintenance Documentation Job Information Job Name Service Organization Address Address City State Zip City State Zip Phone Fax Phone Fax Contact Person Work Done By Name Plate Information Model Volts Hertz Phase Amps Mark Supply Hp Serial Number Field Start Up Documentation Actual Voltage Hertz Phase __ Motor Voltage Actual Amperage Motor Amperage Fan RPM Blower Rotation Ll Correct Air Volume Design CFM Actual CFM Maintenance Date Time Notes NV IOM R 20
18. out of balance Replace Wheel out of balance Replace or rebalance Sheaves eccentric or out of balance Replace or rebalance Accumulation of material on wheel Clean wheel and housing General Dimensions and Weights Optional Filters NV 45 1680 Ibs NV 45 w Heating Coil 1780 Ibs NV 90 2650 Ibs 46 NV 120 3150 Ibs one NV 90 w Heating Coil 2870 Ibs fa el died lth SE Ala ai i iN Optional Weatherhood NV 120 w Heating Coil 3370 Ibs Optional Motorized NV 90 1 20 250 Ibs ELEVATION VIEW Damper Weatherhood is Ho NV 90 120 200 Ibs a Filter Section 52 ii NV 90 120 420 Ibs a Ze i Filter Section w Coil Fa a Motor Control Optional Optional Heating Coil Center Heating Coil Cooling Coil PLAN VIEW Optional Inlet Damper lt 461 4 gt 501 2 NV 90 fof e 62 NV 120 i s Optional Weatherhood Blower Motor Optional Curb a Access Door or Support ELEVATION VIEW Optional Cooling Coil Filter Heating Optional Heating Coil Section I Motor Control Center 1101 2 Heat Pipe eee 1 PLAN VIEW Maintenance Greenheck recommends these procedures to insure trouble free operation of this unit Most unit failures can be attributed to poor setup or poor maintenance A record of maintenance performed on thi
19. rcing cold air through the coils when the fan is shut down Two sets of dampers are frequently required CONTINUOUS WATER CIRCULATION THROUGH THE COIL AT ALL TIMES IS HIGHLY RECOMMENDED 6 Pipe sizes for the system must be selected on the basis of the head pressure available from the circulation pump The velocity should not exceed 8 feet per second and the friction loss should be approximately 3 feet of water column per 100 feet of pipe 7 For chilled water coils the condensate drain pipe should be sized adequately to ensure the condensate drains properly Coil Maintenance Filters Filters upstream of the coil should be checked regularly for dirtiness and clogging If the filters are dirty they should be cleaned or replaced It is important that the coils stay clean to maintain maximum heat transfer capability WARNING Biological Hazard All drain pans and coils should be cleaned on a regular schedule by qualified personnel to prevent the growth of bacteria Cleaning 1 Coils must be clean to obtain maximum performance Soiled fins reduce the capacity of the coil demand more energy from the fan and create a medium for order and bacteria to grow and spread through the conditioned zone High pressure water 700 Psi or less may be used to clean coils with fin thickness over 0095 inches thick TEST THE SPRAY PRESSURE over a small corner of the coil to determine if the fins will withstand the spray pressure For coils with fragile
20. return in any other manner will result in very poor performance 3 The air vent at the uppermost point should be temporarily opened during system start up to release all of the air from the coil To maintain heat transfer capacity periodically vent any air in coil 4 Water coils are not normally recommended for use with entering air temperatures below 40 F however special high pressure water coils have been used successfully on high temperature hot water jobs with low entering air temperatures when correctly controlled No control system can be depended on to be 100 safe against freeze up with water coils Glycol solutions or brines are the only safe media for operation of water coils with low entering air conditions 5 When fresh and return air are to be heated by a hot water coil care should be used in the design of the duct work to ensure thorough mixing before the air enters the coil The return air should always enter the bottom of the duct and the fresh air should enter the top of the duct The greater the distance between the mixing point and the entrance to the coil the better the application Temperature control elements should be located to sense the lowest temperature air that will enter the coil Always install gasketed fresh air dampers which are automatically controlled to close whenever the water leaving the coil is too cool or the fan stops Care should be used in designing fresh air intake to prevent stack effect or wind from fo
21. rom all sides Make sure inlet of unit is located well away from any exhaust fans 1a Slab Construction Recommended Size 1ft wider and longer than total unit size Recommended Material Concrete at least 4 thick Slab should be set and leveled ona sufficient bed of gravel for proper drainage 1b Install Unit Use a crane and spreader bar to prevent damage to unit Lifting lugs are provided as shown in illustration Its is highly recommended that all accessory items be lifted separately and attached after the NV unit is in place Unit may be fastened to slab through lifting lugs Lifting Lugs 4 2 Rail Mounting Rails located 6 12 in from sides of unit Rails extends 6 from discharge end of unit For proper suppor rails should be located 6 12 in from sides of unit and should extend at least 6 beyond both discharge end of unit and filter section Rails extend 6 from end of filter section 3 Curb Mounting See page 9 for curb assembly Install unit on curb using a crane and spreader bar to prevent damage to unit Lifting lugs are provided as shown in illustration It is highly recommended that all accessory items be lifted separately and attached after the unit is set in place 4 Optional Up stream Heating Coil If an optional up stream heating coil is provided with the unit an additional equipment support may be required If filters only are provided in this section addition
22. s unit should be kept This information will provide essential information if problems are encountered A section at the back of this manual is provided for recording the unit s maintenance nO Belt Tension ye Adjustment Screw CAUTION When performing any maintenance on this unit be sure that the power is disconnected and cannot be accidently turned on The control center disconnect can be locked in the off position Blower Housing Rotatio A 2 weeks after startup Check belt tension Belts tend to stretch after a period of time They should be periodically checked for wear and tightness Approximately 3 8 of deflection per ft of span between sheaves is standard for belt tightness When replacing belts use the same type as supplied with the unit Matched belts should always be used on units with multigroove pulleys NOTE For motors of 1 HP or less a smaller sliding base bracket is used to attach to blower Replacement of belts should be accomplished by loosening the tensioning device to the point where the belts can be removed by hand Do not force belts on or off as this may cause breakage of cords leading to premature belt failure Belts should be adjusted as shown above Every 3 Months The filter in the unit should be inspected at least every 3 months Depending on the environment filters could require changing or cleaning more or less often The filters can be slid out of either side of the unit If
23. ture rating of at least 105 C except for energy cut off All wiring should be done in accordance with or sensor lead wire which must be 150 C the National Electrical Code ANSI NFPA 70 latest edition and any local codes that may DANGER apply In Canada wiring should be done in accordance with the Canadian Electrical Code The equipment must be properly grounded High voltage electrical input is needed for this equipment This work should be performed by a qualified electrician Electrical Location Pecica Controls Boer Electrical Power Connection Electrical Power Connection Electrical Controls Door NV 45 NV 90 120 NOTE Any wiring running through the NV unit in the airstream must be protected by flexible metal conduit metal clad cable or raceways Sequence for wiring NV unit For units without control centers The motor nameplate is to be used for determining the voltage and amperage required by the unit For units with control centers 1 The unit s nameplate states the voltage and total amperage required The main feeder supplying power to the unit should be sized for the label s voltage and amperage 2 The main power line should be connected to the disconnect switch Make sure that the disconnect lugs are securely tightened 3 Connect control panel wiring to terminal strip in the control center Greenheck s standard control voltage is 120 60 1 4 When an optional convenience
24. wn is typical for all four corners Roof Curb N gt 41 2 A 241 4 2 Locate and Cut Roof Opening When locating unit make sure there is room to access unit from all sides Make sure inlet of this unit is located well away from exhaust fans EE lt 40 s Roof Opening Roof Opening for NV 120 and NV 90 A 36 x B 36 Co csi 1031 2 3 Install Curb f Located curb over roof opening with dimensions shown to the right and fasten in place 431 4 Check that diagonal dimensions are within 1 8 of each other and adjust as necessary Shim as required to level l A lt 813 16 gt lt B gt 4 Install Ductwork p The following chart shows the duct sizes and straight FEOF Opening i psepsteseei oes ba lengths recommended for optimal performance AMCA O 7 Publication 201 90 Using duct sizes less than Ductwork p o recommended lengths will affect fan performance Good pene 2 ff g duct installation practices should be followed for the Rorcuo CN remaining ductwork Pa ul i r Peueegeeayedeerts Duct Locations Straight E G 2 Duct Length Nv 90 24 93 8 24 301 4 81 NV 120 26 91 2 26 291 4 96 6 Attach Filter Coil Section if included Use a crane and spreader bar hooked to factory 5 Install Unit Use a crane and spreader bar to prevent damage to unit Lifting lugs ar
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