Greenheck Fan Make-Up Air Unit VSU User's Manual
Contents
1. Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes A Model VSU Make Up Air PE Warranty Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the shipment date Any units or parts which prove defective during the warranty period will be replaced at our option when returned to our factory transportation prepaid Motors are warranted by the motor manufacturer for a period of one year Should motors furnished by Greenheck prove defective during this period they should be returned to the nearest authorized motor service station Greenheck will not be responsible for any removal or installation costs As a result of our commitment to continuous improvement Greenheck reserves the right to change specifications without notice Greenheck s Model VSU catalog provides additional AMCA Publication 410 96 Safety Practices for Users and information describing the equipment fan performance Installers of Industrial and Commercial Fans provides available accessories and specification data additional safety information This publication can be obtained from AMCA International Inc at www amca or2. PERTE MIN DE PRESSION WE DANS LE BRULEUR TYPE OF GAS NATURE DU GAZ EQUIPPED FOR AGAINST SCFM CONCU POUR CONTE DESIGN AT AT NORMALE EXTERNAL STATIC PRESSURE WC PRESSION STATIQUE EXTERIEURE Type of gas Maximum gas pressure Direct Gas Nameplate 2 Install Additional Regulator if Required When the supply gas pressure exceeds the maximum gas pressure shown on the direct gas nameplate an additional regulator by others is required to reduce the pressure The regulator must have a listed leak limiting device or it must be vented to the outdoors NOTE The regulator located inside the unit is used to 3 Connect the Supply Gas Line A manual shut off valve gas cock 1 8 in plugged test port and 6 in drip leg must be installed prior to the gas train The valve and the test port must be accessible for the connection of a test gauge Supply gas connections must be made by a qualified installer and are not furnished by Greenheck To Controls gt Ground Nm Gas Cock From Gas gt o Supply n 1 8 in Plugged Tap 6 in Trap Supply Gas Line 4 Pipe the Optional Vent Line If an optional vent line is located between the safety shutoff valves it must be piped to the outdoors WAR
3. FSG begins direct gas burner sequence see Direct Gas Burner sequence Direct Gas Burner Sequence 1 2 Supply Fan Contact Closed Power passes to the supply fan and heat switch Heat Contact Closed Power passes to the heat relay then to the Flame Safeguard Flame Safeguard FSG Sequence Checks for proper airflow Verifies no flame present at burner nitiates 10 second prepurge e Sends power to open pilot gas valve V1 and energizes the spark generator SG clicking of the spark generator may be heard Tries for up to 10 seconds to light pilot and confirm flame Powers the main gas valves open e Shuts down spark generator Continuously monitors the flame and airflow e Performs self diagnostic check every five seconds Model VSU Make Up Air EF Troubleshooting Blower Does Not Operate 115 VAC between terminals 102 and 101 24 VAC between terminals R and X 24 VAC between terminals G and X 24 VAC between terminals 7 and X EF Model vsu Make Up Air Check Main Voltage See Blower Start Up Step 1 Main Disconnect DS1 Off Turn Main Disconnect DS1 On Primary Fuses Blown Replace Fuses Main Transformer Defective Replace Transformer Main Transformer Defective Replace Transformer Supply Switch S2 Off Turn Supply Switch S2 On Damper Limit Switch DL1 Holding Wait for actuator to open fully or adjust limit switch Broken Fan Belt Replace Reference Mai
4. H GREENHECK Building Value in Air Part 457831 VSU Make Up Air Unit Installation Operation and Maintenance Manual Please read and save these instructions Read carefully before attempting to assemble install operate or maintain the product described Protect yourself and others by observing all safety information Failure to comply with instructions could result in personal injury and or property damage Retain instructions for future reference Model VSU Optional Service Platform Shown General Safety Information Only qualified personnel should install this unit Personnel should have a clear understanding of these instructions and should be aware of general safety precautions Improper installation can result in electric shock possible injury due to coming in contact with moving parts as well as other potential hazards Other considerations may be required if high winds or seismic activity are present If more information is needed contact a licensed professional engineer before moving forward 1 Follow all local electrical and safety codes as well as the National Electrical Code NEC the National Fire Protection Agency NFPA where applicable Follow the Canadian Electric Code CEC in Canada DANGER Always disconnect power before working on or near a unit Lock and tag the disconnect switch or breaker to prevent accidental power up CAUTION When servicing the unit motor may be hot enough to c
5. NOTE Flame rods can last many years but because of thermal expansion of the porcelain flame rods can fail over time Model VSU Make Up Air ET Reference Typical Control Center Layout 1 Spark Generator 7 Motor Fuses 2 Temperature Selector 8 Heating Inlet Air Switch 3 Amplifier 9 Flame Safeguard 4 24V Transformer 10 High Limit Switch 5 120V Transformer 11 Disconnect 6 Transformer Fuses 12 Soft Start Typical Gas Train Layout Airflow Switch View Port High Low Gas Pressure Pilot Solenoid Modulating Valve Valve Pilot Regulator Hand EN ES SE Valve Manual Shutoff Gas Supply Connection Fluid Valve Two are provided on Canadian units ET Model vsu Make Up Air Reference Start Up Checklist Unit Model Number e g VSU 220 H40 UB Unit Serial Number e g 04c99999 or 10111000 Start Up Date Start Up Personnel Name Start Up Company Phone Number Pre Start Up Checklist check boxes as items are completed Check tightness of all factory wiring connections Verify control wiring wire gauge Hand rotate blower to verify free rotation Verify supply voltage to the main disconnect Verify the supply gas pressure Verify remote controls wiring dqadddd Start Up Blower Checklist refer to Blower Start Up section for further detail O Check line voltage L1 L2 L2 L3 L1 L3 O Check blower rotation O Check for vibration O Supply fan RPM RPM
6. EQUIPPED FOR AGAINST MAX BURNER PRESSURE DROP PERTE MAX DE PRESSION DANS LE BRULEUR DESIGN AT AT NORMALE EXTERNAL STATIC PRESSURE SCFM WoC CONCU POUR CONTE PRESSION STATIQUE EXTERIEURE Z Type of gas Direct Gas Nameplate 2 Check the Pilot Gas Pressure Check the pilot gas pressure The recommended gas pressure is 3 in wc Adjust the pilot regulator as needed See the Gas Train Layout in the Reference section for the location of the pilot pressure test port and pilot regulator IMPORTANT Proper air velocity over the burner is critical on direct fired gas units If the air velocity is not within the unit specifications the unit will not operate efficiently may have sporadic shutdowns and may produce excessive carbon monoxide CO or other gases ET Model vsu Make Up Air 3 Set the Burner Air Pressure Differential With the fan running and discharging 70 F 21 C air connect a U Tube manometer to the outer sensing probes see below and measure the static pressure across the burner Outer Sensing Probes 0 625 0 675 i Measuring the Pressure Drop The proper static pressure should be between 0 625 and 0 675 inches wc 155 68 and 168 64 Pa If needed evenly adjust the baffles on both sides of the burner keeping the burner centered in the opening until the required pressure
7. Step 4 If it suddenly drops to zero the flame rod is grounding out Adjust the flame rod to avoid contact with the burner or the unit If the flame signal is above 1 25 VDC and constant the main gas valves will remain open until the call for heat is interrupted or the unit is shut down Model VSU Make Up Air Maintenance Routine CAUTION Lock out the gas and the electrical power to the unit before performing any maintenance or service operations to this unit V Belt Drives V belt drives must be checked on a regular basis for wear tension alignment and dirt accumulation Check the tension by measuring the deflection in the belt as shown below Check the alignment by using a straight edge across both sheaves as shown below IMPORTANT Premature or frequent belt failures can be caused by improper belt tension or misaligned sheaves Abnormally high belt tension or drive misalignment will cause excessive bearing loads and may result in failure of the fan and or motor bearings e Abnormally low belt tension will cause squealing on start up excessive belt flutter slippage and overheated sheaves IMPORTANT Do not pry belts on or off the sheave Loosen belt tension until belts can be removed by simply lifting the belts off the sheaves IMPORTANT When replacing V belts on multiple groove drives all belts should be changed to provide uniform drive loading IMPORTANT Do not install new belts on wor
8. ductwork methods recommended by AMCA to make this elbow to minimize duct losses Dimensional Data Upblast Discharge Elevation View F lt H gt A LY X NY K Lifting Lugs A fo C E Electrical Controls J A E Gas Controls Y Y 24 B gt Direct Gas units only Standard factory clearance Additional stand heights are available from the factory Unit Dimensional Data Blower Dimensional Data Housing Blower E UE SEE eid E 4 m 54 95 144 oo 220 26 All dimensions are shown in inches Weights will vary with blower and horsepower A Model VSU Make Up Air E Installation of Direct Gas Piping IMPORTANT All gas piping must be installed in accordance with the latest edition of the National Fuel Gas Code ANSI Z223 1 and any local codes that may apply In Canada the equipment shall be installed in accordance with the Installation Code for Gas Burning Appliances and Equipment CGA B149 and Provincial Regulations for the class Authorities having jurisdiction should be consulted before installations are made WARNING All components of this or any other gas fired heating unit must be leak tested prior to placing the unit into operation A soap and water solution should be used to perform this test NEVER test for gas leaks with an open flame WARNING If pressure testing in excess of 1 2 psig 3 5 kPa
9. is obtained Adjustable Baffle Airflow Burner Adjustable Baffle Burner and Baffles NOTE The pressure drop was set at the factory and may not need adjustment NOTE When required pressure is obtained be sure to reconnect the outer sensing probes IMPORTANT This process may need to be repeated until the proper pressure is achieved This adjustment will change the air quantity delivered by the unit and therefore the air quantity delivered should be rechecked Refer to the Blower Start Up section To increase the static pressure decrease the opening To decrease the static pressure increase the opening 4 Set the Maximum Firing Rate Monitor the unit s actual temperature rise by placing a thermocouple in the unit s inlet and a second in the discharge three duct diameters downstream of the burner Send the unit to maximum fire by disconnecting and isolating the wire connected to Terminal 4 on the Maxitrol 14 While monitoring the units temperature rise set the maximum firing rate by adjusting the regulator until the designed temperature rise is achieved After setting the maximum firing rate reconnect the wire to the amplifier Do not set the burner maximum firing rate based on gas pressure It should be set based on the unit s designed temperature rise shown on the direct gas label T MIN GAS E PRESSURE PRESSURE PRESSION DE GAZ mE PRESSION DE GAZ We MAX MIN BURNE
10. LL 4 DUCIWOIK S04 uoa aromas ER Ra Rae 4 Dimensional Data serre 5 Direct Gas Piping ooo oooooooo 6 7 Start Up BIOWOE PP 8 9 Direct Gas cir a RR XR RR e ACRAS 10 12 Operation Electrical iu iii e Racer ra ccn 13 Troubleshooting BloWer sio kx ol RC RR 14 Heater 22k dese ra 15 17 Maintenance Routine 2224s as xa 18 19 dM 19 Reference Typical Control Center Layout 20 Typical Gas Train Layout 20 Start Up Check List ooooooomoo 21 Maintenance Log lesse 22 23 Watranty AE ENEE shard REE eects Backcover Installation 1 Filter Stand Section The unit should be mounted on a concrete slab four inches thick with a proper gravel drainage bed Allow one foot on each side of the unit as shown in the Concrete Slab and Unit Footprint drawing below Concrete Slab Dimensions Housing Size 40 All dimensions are shown in inches Building Wall Approx Stand Feet Locations Concrete Slab Unit Control Side Required with service 2 6 E o HS S o Concrete Slab and Unit Footprint The filter section ships inside the stand see drawing on next page After the unit is set on the slab it can be anchored through the stand feet The unit footprint of the unit is shown above Greenheck recommends having a three foot clearance on the controls side and a two foot clearance on the other three sides of
11. NING Reference the National Fuel Gas Code for additional vent line requirements Vent Line Solenoid LA To Outdoors gt Vent Line Lo E E emer 1 27 S7 lt From supaiy LT LT CT Safety we Shut off Valves Optional Vent Line 5 Test the System for Leaks Check both the supply lines and the factory piping for leaks Apply a soap and water solution to all piping and watch for bubbling which indicates a leak WARNING NEVER test for a gas leak with an open flame NOTE The factory piping has been checked for leaks but should be rechecked due to shipping and installation Model VSU Make Up Air Start Up Blower 2 Check the Blower Rotation EE A a oa ae ae eee a Open the blower access door Refer to the Start Up Checklist in the Reference and run the blower momentarily section before proceeding further to determine the rotation Pre Start Up Check Arrows are placed on the Rotate the fan wheel by hand and make sure no parts blower scroll to indicate the are rubbing Check the V belt drive for proper alignment proper direction or reference Blow and tension a guide for proper belt tension and the example shown to the right Ee alignment is provided in the Belt Maintenance section Blower Rotation Check fasteners set screws and
12. O Motor nameplate amps Amps O Actual motor amps Amps O Actual CFM delivered CFM Optional Accessories refer to Blower Start Up section Step 6 for further detail O Heating Inlet Air Sensor Actual Setting Typical setting 60 70 F Start Up Direct Gas refer to Direct Gas Start Up section for further detail O Check supply gas pressure Maximum Minimum Actual O Check Pilot Gas Pressure Actual Setting Typical 3 0 inch wc O Set optional High Gas Pressure Switch Actual Setting Typical 8 0 inch wc O Set optional Low Gas Pressure Switch Actual Setting Typical 3 0 inch wc O Set Burner Pressure Differential Actual Setting Typical 0 65 inch wc O Set the maximum firing rate temp rise O Set the minimum firing rate check O Set the unit s operating temperature F Model VSU Make Up Air EX Maintenance Log Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes EZ Model vsu Make Up Air 8 Maintenance Log
13. R MAX BURNER PRESSURE DROP we PRESSURE DROP PSI PERTE MIN DE PRESSION PERTE MAX DE PRESSION DANS LE BRULEUR DANS LE BRULEUR TYPE OF GAS DESIGN AT NATURE DU GAZ AT NORMALE EQUIPPED FOR AGAINST EXTERNAL STATIC PRESSURE SCFM WC CONCU POUR CONTE PRESSION STATIQUE EXTERIEURE L Direct Gas Nameplate Maxitrol Series 14 7 terminals Remove the wire from terminal 4 to send the unit to maximum fire Low fire time delay setting 75 of maximum IMPORTANT Setting the maximum firing rate during mild weather conditions may cause the high limit to trip out during extreme conditions requiring manual resetting Gas trains are equipped with either separate regulators and modulating valves or with a combined modulating valve Clockwise rotation increases the temperature rise counterclockwise rotation decreases the temperature rise Regulators and Modulating Valves Remove one wire to send the unit to the minimum firing rate Remove cap to access maximum firing rate adjustment Minimum firing rate adjustment Separate Regulator and Modulating Valves 5 Set the Minimum Firing Rate Disconnect and isolate one of the wires running to the modulating valve to send the unit to its minimum firing rate Set the minimum firing rate by adjusting the needle valve shown above After setting the minimum firing rate shut off the pilot to ensure that the f
14. Setting 7 Flame Signal Check To measure the flame signal connect a standard DC voltmeter to the flame amplifier test jacks and com as shown to the right The flame signal should be above 1 25 VDC and steady Check the flame signal with the burner at pilot only minimum fire mid fire and high fire DC Voltmeter and Flame Amplifier IMPORTANT If the flame signal is not above 1 25 VDC and steady consult the troubleshooting section EE Model vsu Make Up Air Operation Electrical Electrical Sequence 1 Supply Fan Contact S2 Closed e Power passes to damper which opens e When damper is fully opened damper relay D1 is energized an optional N O damper limit switch DL1 closes e Power passes through a N C fault contact on soft starter PST FAULT e Power passes to and energizes supply fan relay RI e Supply fan starts Heat Contact S4 Closed e Power passes to N O fan relay which is energized and closed Power passes to inlet air sensor contact TS which is energized and closed if the inlet air temperature is below the set point e Power passes to and energizes the heat relay RH N O heat relay contact RH closes Power passes to and energizes terminal 5 of the Flame Safeguard FSG Power passes to N C high limit control contact HLC which is closed if temperature has remained below the high limit set point Power passes to terminal 6 of the Flame Safeguard FSG Flame Safeguard
15. ause pain or injury Allow motor to cool before servicing EN Model vsu Make Up Air Unit 2 The rotation of the wheel is critical It must be free to rotate without striking or rubbing any stationary objects 3 Motor must be securely and adequately grounded 4 Do not spin fan wheel faster than the maximum cataloged fan rom Adjustments to fan speed significantly affects motor load If the fan RPM is changed the motor current should be checked to make sure it is not exceeding the motor nameplate amps 5 Do not allow the power cable to kink or come in contact with oil grease hot surfaces or chemicals Replace cord immediately if damaged 6 Verify that the power source is compatible with the equipment 7 Never open blower access doors while the fan is running FOR YOUR SAFETY If you smell gas Open windows Do not touch electrical switches Extinguish any open flame Immediately call your gas supplier FOR YOUR SAFETY The use and storage of gasoline or other flammable vapors and liquids in open containers in the vicinity of this appliance is hazardous 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 Receiving Upon receiving the product check to make sure all items are accounted for by ref
16. erencing the bill of lading to ensure all items were received Inspect each crate for shipping damage before accepting delivery Notify the carrier if any damage is noticed The carrier will make notification on the delivery receipt acknowledging any damage to the product All damage should be noted on all the copies of the bill of lading which is countersigned by the delivering carrier A Carrier Inspection Report should be filled out by the carrier upon arrival and the Traffic Department If damaged upon arrival file claim with carrier Any physical damage to the unit after acceptance is not the responsibility of Greenheck Fan Corporation Unpacking Verify that all required parts and the correct quantity of each item have been received If any items are missing report shortages to your local representative to arrange for obtaining missing parts Sometimes it is not possible that all items for the unit be shipped together due to availability of transportation and truck space Confirmation of shipment s must be limited to only items on the bill of lading Handling Units are to be rigged and moved by the lifting brackets provided or by the skid when a forklift is used Location of brackets varies by model and size Handle in such a manner as to keep from scratching or chipping the coating Damaged finish may reduce ability of unit to resist corrosion Storage Units are protected against damage during shipment If the unit cannot be in
17. g A GREENHECK Building Value in Air Phone 715 359 6171 Fax 715 355 2399 e E mail gfcinfo greenheck com Web site www greenheck com 24 457831 Model VSU IOM Rev 3 March 2009 Copyright 2009 O Greenheck Fan Corporation
18. he pilot pressure Reference Direct Gas Start Up Step 2 With proper airflow gas pressure and spark the unit should light If problems remain consult the factory Troubleshooting Heater Does Not Operate Visible pilot Measure the flame signal when there is a visible pilot Flame signal greater than 1 25 VDC Check for proper airflow Direct Gas Start Up Step 3 Pressure drop across the burner between 0 625 and 0 675 in wc Check the minimum firing rate Direct Gas Start Up Step 4 Is the minimum firing rate set correctly Does the flame signal remain constant Yes Note The flame signal should be steady and above 1 25 VDC with a visible pilot Reference Direct Gas Start Up Step 7 Unit is not grounded Properly ground unit Flame rod is grounding out Adjust the flame rod to avoid contact with the burner or the unit Cracked porcelain on flame rod Replace flame rod Note When the pressure is low or marginal and the unit begins heating the air density will change This can cause the pressure to drop below the minimum setting Also low airflow can cause the flame to walk out of the burner and away from the flame sensor causing the unit to recycle Adjust burner baffles Reference Direct Gas Start Up Step 3 Adjust the minimum firing rate Reference Direct Gas Start Up Step 4 If the signal slowly drops off typically the airflow is too low Reference Blower Start Up
19. he side of the filters IMPORTANT Replacement filters should be from the same manufacturer and the same size as the original filters provided with the unit Bearings The bearings for Greenheck fans are carefully selected to match the maximum load and operating conditions of the specific class arrangement and fan size The instructions provided in this manual and those provided by the bearing manufacturer will minimize any bearing problems IMPORTANT Lubricate bearings prior to periods of extended shutdowns or storage and rotate shaft monthly to aid in corrosion prevention If the fan is stored more than three months purge the bearings with new grease prior to start up Recommended Bearing Lubrication Schedule in Months Fan Bearing Bore Size inches RPM 1 1 196 176 1 2 7so e 5 4 3 3 Suggested initial greasing interval is based on 12 hour per day operation and 150 F maximum housing temperature For continuous 24 hour operation decrease greasing interval by 50 e If extended grease lines are present relubricate while in operation only without endangering personnel For ball bearings operating relubricate until clean grease is seen purging at the seals Be sure not to unseat the seal by over lubricating For ball bearings idle add 1 2 shots of grease up to 2 inch bore size and 4 5 shots above 2 inch bore sizes with a hand grease gun For roller bearings add 4 shots of grease up
20. ing Heater Does Not Operate Attempts to light but no pilot visible spark Check inlet gas pressure Direct Gas Start Up Step 1 Yes Gas pressure between the minimum and maximum shown No on the direct gas label Air in the gas line Yos No Check for proper airflow Direct Gas Start Up Step 3 Yes Pressure drop across the burner No between 0 625 and 0 675 in wc Yes Proper spark Yes Check for proper pilot pressure Direct Gas Start Up Step 2 Pilot pressure correct Yes ET Model vsu Make Up Air Note The minimum and maximum gas pressures for your unit are shown on the direct gas label Reference Direct Gas Start Up Step 1 Correct gas pressure Reference Direct Gas Start Up Step 1 Purge gas line Verify gas at the pilot Note The airflow may satisfy the airflow switch but may make lighting the pilot difficult Adjust the pressure drop across the burner between 0 625 and 0 675 in wc shown in Direct Gas Start Up Step 3 Adjust burner baffles Reference Direct Gas Start Up Step 3 Crossed flame and spark wires Uncross wires and reconnect Incorrect spark plug gap Set spark plug gap to 0 062 in Defective spark plug Replace spark plug Note A high pilot pressure will make lighting more difficult Lower the pilot pressure in increments until the unit lights Then set the pilot per the instruction in Direct Gas Start Up Step 2 Adjust t
21. lame safeguard can still read the main flame signal Reconnect the wire to the modulation valve and open the pilot shut off valve The minimum setting for the maximum firing rate may be higher than required This is acceptable The burner will modulate as needed IMPORTANT The proper minimum firing rate setting results in a small ribbon of continuous flame which covers the flame road and runs across the entire burner IMPORTANT Do not allow the disconnected wire to come in contact with a potential ground Damage to the amplifier or transformer could result NOTE Gas trains are equipped with separate regulators and modulating valves NOTE Adjusting the maximum and minimum firing rate requires the inlet air sensor to be set higher than the outdoor air temperature in order to start the burner s Once high and low fire have been set the inlet air sensor should be set to the desired temperature Counterclockwise rotation increases the minimum fire rate setting clockwise rotation decreases the setting Model VSU Make Up Air KE 6 Set the Unit s Operating Temperature Set the operating temperature The operating temperature setting depends on which Maxitrol controller is used Maxitrol Series 14 The Maxitrol Series 14 should be set to the desired discharge temperature The temperature selector is built into the amplifier Set the discharge temperature Typical 65 F Series 14 Discharge Temperature
22. locking collars on the fan bearings drive motor base and accessories for tightness To reverse the rotation on three phase units disconnect and lock out the power then WARNING interchange any two power leads Disconnect and lock out all power and gas before performing any maintenance or service to the unit Failure to due so could result in serious injury or death and damage to equipment To reverse the rotation on single phase units disconnect and lock out the power then rewire the motor per the manufacturer s instructions SPECIAL EQUIPMENT REQUIRED IMPORTANT Required and recommended tools Equivalent If the blower io rotating in the wrong direction the unit will move some air but will not perform as products may be used designed Be sure to perform a visual inspection to Manufacturer Fluke guarantee the correct blower rotation Amper de Model 177 perag Phone 1 800 44 FLUKE 3 Check for Vibration Meter www fluke com Check for unusual noise vibration or overheating of Manufacturer the bearings Reference the Troubleshooting section Model for corrective actions Phone 1 800 44 FLUKE IMPORTANT www fluke com Manufacturer Excessive vibration may be experienced during Micro Amp Model the initial start up Left unchecked it can cause a Meter Phone 1 800 44 FLUKE multitude of problems including structural and or aueue can component failure anufacturer wyer U Tube Model Slack Tube IMPORTANT Manomete
23. me is changed the motor s amps must be checked to prevent overloading the motor NOTE To ensure accuracy the dampers are to be open when measuring the air volume 6 Set up Optional Components Adjust the settings on the optional components See the Control Center Layout in the Reference section for location of optional components Heating Inlet Air Sensor Typical setting 60 70 F Model VSU Make Up Air PE Start Up Direct Gas IMPORTANT For proper unit function and safety follow the start up procedure in the exact order that it is presented IMPORTANT This start up should begin after all of the installation procedures and the blower start up have been completed 1 Check the Supply Gas Pressure Check the supply gas pressure and compare it with the unit s nameplate pressure requirements Adjust the supply regulator as needed until the supply gas pressure is within the specified range The direct gas nameplate is located on the outside of the unit on the control center side Minimum and maximum gas pressures for maximum output MAX BTU HR BTU H MAX MIN BTU HR BTU H MIN MIN GAS PRESSURE FOR MAX OUTPUT PRESSION DE GAZ MIN POUR PUISSANCE MAX NORMAL MANIFOLD PRESSURE PRESSION DOADMISSION NORMALE MIN GAS PRESSURE PRESSION DE GAZ PRESSURE PRESSION DE GAZ MAX MIN BURNER PRESSURE DROP PERTE MIN DE PRESSION DANS LE BRULEUR TYPE OF GAS NATURE DU GAZ
24. n sheaves If the sheaves have grooves worn in them they must be replaced before new belts are installed Deflection Belt Span 64 Belt Span Belt Tension Drive Alignment ET Model vsu Make Up Air Motors Motor maintenance is generally limited to cleaning and lubrication where applicable Cleaning should be limited to exterior surfaces only Removing dust and grease build up on the motor assures proper motor cooling Motors supplied with grease fittings should be greased in accordance with the manufacturer s recommendations IMPORTANT Do not allow water or solvents to enter the motor or bearings Motors and bearings should never be sprayed with steam water or solvents IMPORTANT Greasing motors is only intended when fittings are provided Many motors are permanently lubricated requiring no additional lubrication Wheels Wheels require little attention when moving clean air Occasionally oil and dust may accumulate on the wheel causing imbalance When this occurs the wheel and housing should be cleaned to assure proper operation Filters Filter maintenance is generally limited to cleaning and replacement Aluminum mesh filters can be washed in warm soapy water An adhesive spray can be added to aluminum mesh filters to increase their efficiency IMPORTANT When reinstalling filters be sure to install them with the airflow in the correct direction An airflow direction arrow is located on t
25. ntenance section Defective motor or capacitor Repair Replace Blown Motor Fuse Replace One or more legs of 3 phase is out Restore missing legs At this time the supply should be energized passing power to the supply motor and the blower should start Troubleshooting Heater Does Not Operate Does not attempt to light No visible spark 24 VAC between No terminals W1 and X Heat Switch S4 Off Yes Turn Heat Switch S4 On Heat Switch Not Wired Wire Heat Switch S4 115 VAC between No terminals 102 and 101 Primary Fuses Blown Yes Replace Fuses Main Transformer TR4 Defective 415 VAC between iB Replace Transformer terminals 103 and 101 Inlet Air Sensor TS Holding Yes Adjust TS setting Reference Blower Start Up Step 6 Heat Relay RH Defective Replace Heat Relay RH The power light on the flame safeguard should blink approximately every 5 seconds as it performs a self diagnostics check 115 VAC between No terminals 104 and 101 High Limit HLC Tripped Reset Replace High Limit HLC Check on cause of control loss Yes Continuity between No terminals 107 and 108 Airflow Switch PS Holding for Proper Airflow Correct airflow across burner Reference Direct Gas Start Up Step 3 Yes At this time the heater should attempt to light The pilot light on the flame safeguard should illuminate A Model VSU Make Up Air KT Troubleshoot
26. olutions to distribute lubricant on motor Every three months the fan motor should be energized If paint deterioration begins consideration should be given to touch up or repainting Fans with special coatings may require special techniques for touch up or repair Machined parts coated with rust preventive should be restored to good condition promptly if signs of rust occur Immediately remove the original rust preventive coating with petroleum solvent and clean with lint free cloths Polish any remaining rust from surface with crocus cloth or fine emery paper and oil Do not destroy the continuity of the surfaces Wipe thoroughly clean with Tectyl 506 Ashland Inc or the equivalent For hard to reach internal surfaces or for occasional use consider using Tectyl 511M Rust Preventive or WD 40e or the equivalent REMOVING FROM STORAGE As units are removed from storage to be installed in their final location they should be protected and maintained in a similar fashion until the equipment goes into operation Prior to installing the unit and system components inspect the unit assembly to make sure it is in working order 1 Check all fasteners set screws on the fan wheel bearings drive motor base and accessories for tightness 2 Rotate the fan wheel s by hand and assure no parts are rubbing Table of Contents Installation Filter Stand Section 3 4 Burner Blower Section L
27. r Phone 1 219 897 8000 Generally fan vibration and noise is transmitted www dwyer inst com to other parts of the building by the ductwork To Manufacturer Monarch minimize this undesirable effect the use of heavy Model Pocket Tach 100 canvas duct connectors is recommended Tachometer Phone 1 800 999 3390 www monarchinstrument com 4 Motor Check Voltage amp Thermometer Measure the motor s voltage amps and RPM WARNING Compare to the specifications Motor amps can be Check the housing blower and ductwork for any reduced by lowering the motor RPM or increasing foreign objects before running the blower system static pressure 1 Check the Voltage Before starting the unit compare the supplied voltage hertz and phase with the unit and motor s nameplate information Voltage Hertz Phase Y VOLTS HZ PH SUP HP EXH HP MCA MOP Electrical Nameplate EN Model vsu Make Up Air 5 Air Volume Measurement 8 Check Measure the unit s air volume cfm and compare it with it s rated air volume If the measured air volume is off adjust the fan s RPM by changing adjusting the drive The most accurate way to measure the air volume is by using a pitot traverse method downstream of the blower Other methods can be used but should be proven and accurate IMPORTANT Changing the air volume can significantly increase the motor s amps If the air volu
28. stalled and operated immediately precautions need to be taken to prevent deterioration of the unit during storage The user assumes responsibility of the unit and accessories while in storage The manufacturer will not be responsible for damage during storage These suggestions are provided solely as a convenience to the user OUTDOOR Units designed for outdoor applications may be stored outdoors if absolutely necessary Roads or aisles for portable cranes and hauling equipment are needed The fan should be placed on a level surface to prevent water from leaking into the unit The unit should be elevated on an adequate number of wooden blocks so that it is above water and snow levels and has enough blocking to prevent it from settling into soft ground Locate parts far enough apart to permit air circulation sunlight and space for periodic inspection To minimize water accumulation place all unit parts on blocking supports so that rain water will run off Do not cover parts with plastic film or tarps as these cause condensation of moisture from the air passing through heating and cooling cycles EN Model vsu Make Up Air Inspection and Maintenance during Storage While in storage inspect fans once per month Keep a record of inspection and maintenance performed If moisture or dirt accumulations are found on parts the source should be located and eliminated At each inspection rotate the fan wheel by hand ten to fifteen rev
29. the heater and manual shutoff valve must be disconnected from the supply gas line WARNING If pressure testing at or below 1 2 psig 3 5 kPa the heater must be isolated from the supply gas line by closing its manual shutoff valve IMPORTANT All piping should be clean and free of any foreign matter Foreign material entering the gas train can damage the valves regulators and burner IMPORTANT Do NOT connect the unit to gas types other than what is specified and do NOT connect the unit to gas pressures that are outside of the pressure range shown on the label When connecting the gas supply the length of the run must be considered in determining the pipe size to avoid excessive pressure drop Refer to a Gas Engineer s Handbook for gas pipe capacities EN Model vsu Make Up Air 1 Determine the Supply Gas Requirements The unit s direct gas nameplate states the requirements for the gas being supplied to the unit The direct gas nameplate is located on the outside of the unit on the control center side Minimum gas pressure for maximum output MAX BTU HR MIN BTU HA BTU H MAX BTU H MIN NORMAL MANIFOLD MIN GAS PRESSURE PRESSURE FOR MAX OUTPUT PRESSION DE GAZ MIN PRESSION DOADMISSION IRMALE POUR PUISSANCE MAX MIN GAS PRESSURE We PRESSURE WO PRESSION DE GAZ PRESSION DE GAZ MAX MIN BURNER PRESSURE DROP PRESSURE DROP PERTE MAX DE PRESSION DANS LE BRULEUR
30. the unit for serviceability The following statement pertains to direct gas units only When ordered with insulation this unit has a zero inch clearance tolerance to any combustibles on all sides and top Without insulation the clearance tolerance is six inches Model VSU Make Up Air PE Installation continued 2 Burner Blower Section Use a crane and a spreader bar hooked to the factory lifting lugs shown below to lift and center the unit onto the filter stand section The sections can be caulked together but it is not needed with the water kickouts provided with this section P 3 Install Ductwork This table shows the duct sizes and straight lengths recommended for optimal performance AMCA Publication 201 90 Using duct sizes less than recommended will affect fan performance Good duct installation practices should be followed for the remaining ductwork See the drawings in the Dimensional Data section for duct locations Recommended Supply Ductwork Sizes Straight Duct Length VSU Blower Size 220 68 x 26 inches 117 inches EW Model vsu Make Up Air 4 Complete Installation A typical horizontal discharge installation is shown Gas and or electrical lines can be connected at this time For upblast units a duct elbow may be needed to turn the ductwork into the building Follow proper
31. to 2 inch bore size and 8 shots for 2 5 inch bore size with a hand grease gun Adjust relubrication frequency based on condition of purged grease A high quality lithium based grease conforming to NLGI Grade 2 consistency such as those listed here Mobil 532 Texaco Multifak 2 B Shell Alavania 2 Mobilux 2 Texaco Premium 2 Exxon Unirex 2 Maintenance Fall Start Up Repeat the Blower Start Up Step 5 and Direct Gas Start Up Steps 1 through 4 This will ensure that the gas and air are set properly before the heating season begins and should lead to trouble free operation all winter High Limit The high limit switch may have tripped over the summer it should be checked and reset if necessary Burner Inspect the burner for accumulation of scales on both the upstream and downstream sides of the mixing plates Any scaling or foreign material should be removed with a wire brush Visually check that all holes in the mixing plates are clear If any burner ports are plugged even partially clear them with a piece of wire or another appropriate tool Replace or tighten any loose or missing fasteners on the mixing plates Always use zinc plated or stainless steel fasteners Inspect and clean the flame and spark rod Occasional replacement of the flame rod and spark rod may be necessary to ensure optimum unit performance WARNING Do not enlarge burner ports when clearing a blockage performance could be affected
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