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1. 4 ff TEE WITH DRIP LEG AND CLEANOUT CAP Tu DOWNWARD SLOPE 114 PER FOOT RECOMMENDED TOWARD DRIP LEG Size according to expected snow depth 8 6 583 5 INSTALLATION VENTING For single wall vent pipe and 10 or greater horizontal distance to any portion of a building the vent must terminate at least 3 2 for non residential installations above the highest point where it passes through a roof of a building and at least 2 higher than any portion of a building within a horizontal distance of 10 See Figure 9 1 Figure 9 1 Vertical Vent Termination for Single Wall Vent Pipe and Greater Than 10 Horizontally From Adjacent Wall or Building GREATER THAN 10 FEET TO WALL OR ADJOINING BUILDING LISTED TERMINAL ROOF FLASHING NS SISS USE LISTED THIMBLE THROUGH CEILING TEE WITH DRIP LEG AND CLEANOUT CAP DOWNWARD SLOPE 1 4 PER FOOT RECOMMENDED TOWARD DRIP LEG GREATER THAN 10 FEET LISTED TERMINAL 10 FEET HEIGHT ABOVE ANY ROOF SURFACE WITHIN 10 FEET USE LISTED THIMBLE THROUGH ROOF USE LISTED THIMBLE THROUGH CEILING e For single wall vent pipe and less than 10 horizontal distance to any portion of a building the vent must terminate 2 higher than any portion of that building See Figure 9 2 Figure 9 2 Vertical Vent Termination for Single Wall Vent Pipe and 10 or L
2. C4 The vent must be supported as shown in Figure 10 1 Figure 10 1 Exhaust Vent Construction Through Combustible Walls and Support Bracket METAL FIBER GLASS SLEEVE INSULATION MIN 2 2 MIN VENT PIPE DIAMETER METAL FACE PLATE h METAL N SLEEVE 2 MIN VENT TERMINATION SUPPORT BRACKET EM where required Make from 1 x 1 steel angle C5 When condensation may be a problem the vent system shall not terminate over public walkways or over an area where condensate or vapor could create a nuisance or hazard or could be detrimental to the operation of regulators relief openings or other equipment C6 The venting system must be exclusive to a single unit and no other unit is allowed to be vented into it C7 When vented horizontally maintain a 1 4 per foot rise away from the heater and place a drip leg with clean out near the unit as shown in Figure 10 2 Where local authorities have jurisdiction a 1 4 per foot downward slope is acceptable with a drip leg and clean out near the exit of the vent as shown in Figure 10 3 or allow the condensate to drip out the end Figure 10 2 Horizontal Category Ill Venting with Upward Pitch Listed Terminal Drip leg Clean out cap 6 Above snow Listed Thimble grade 1 4 Slope per foot up towards termination 3 Min n 30 Max idi Figure 10 3 Horizontal Category
3. e The horizontal portion of the vent run cannot exceed 75 of the vertical rise Example If the vent height is 10 feet the horizontal portion of the vent system cannot exceed 7 5 feet e vent terminates a minimum of 5 above the vent connector on the unit e If the vent system to be installed meets ALL these criteria an example is shown in Figure 9 1 proceed to Section B Vertical Vent System Installation For all other cases proceed to the next section for Horizontal Category III Vent System Determination Horizontal Category Ill Vent System Determination e Horizontal vent systems terminate horizontally sideways e Avent system that terminates vertically but has a horizontal run that exceeds 75 of the vertical rise is considered horizontal Horizontal vent configurations are Category Ill For residential installations this requires the use of an agency approved UL1738 Category III vent system Additional requirements including those for commercial and industrial installations are covered in Section C Horizontal Category III Vent System Installation INSTALLATION VENTING Section B Vertical Vent System Installation Figure 8 1 Vertical Vent Termination for Double B1 This section applies to vertically vented Category 1 Wall Vent Pipe and Greater Than or Less Than 8 vent systems and is in addition to Section General Horizontally From a Vertical Wall or Obstruction Instructions Al
4. Listed Thimble dd 1 X Clearance Specified by Type B Vent Mfg Single Wall Double Wall Listed Pipe Terminating with Double Wall IE 44 Terminal CI Vent Pipe P Clearance Specified Agency Approved Vent Kit or Single Wall Vent Pipe by Type B Vent Mfg Single Wall Listed a Terminal Listed ud Thimble D See Instruction A10 for attaching single wall pipe to double wall pipe 6 583 5 INSTALLATION VENTING diameter is necessary If there is 6 or more of vent pipe in the open space between the appliance and where the vent pipe passes through the wall or floor the thimble need only be 2 greater than the diameter of the vent pipe If a thimble is not used all combustible material must be cut away to provide 6 of clearance Where authorities have jurisdiction type B vent may be used for the last section of vent pipe to maintain clearance to combustibles while passing through wall or floor See Figure 6 1 Any material used to close the opening must be noncombustible A11 The following are General Instructions for Double Wall type B Terminal Pipe Installation How to attach a single wall vent terminal to double wall type B vent pipe 1 Look for the flow arrow on the vent pipe 2 Slide the vent terminal inside the exhaust end of the double wall vent pipe 3 Drill 3 holes through the pipe and the vent terminal Us
5. 0 00379 Btu 1 06 kJ Gal Hr 3 79 Btu ft3 37 3 kJ m3 gallons 3 79 Btu hr 0 000293 kW Horsepower 746 ft3 hr 0 000472 m3 min inches 25 4 ft3 hr 0 00000787 m3 s pound 0 454 CFM ft3 min 0 0283 m3 min psig 6 89 CFM ft3 min 0 000472 m3 s psig 27 7 6 583 5 UNIT LOCATION UNIT LOCATION A DANGER to a potentially explosive or flammable atmosphere A CAUTION Clearances to combustible materials are critical Be sure to follow all listed requirements Do not locate units in tightly sealed rooms or small compartments commonly referred to as confined spaces without provisions for adequate combustion air and venting Combustion air must have access to the confined space through a minimum of two permanent openings in the enclosure at least one near the bottom They should provide a free area of one square inch per 1 000 BTU Hr input rating of the unit with a minimum of 100 square inches for each opening whichever is greater Low profile heaters are designed for use in heating applica tions with ambient startup temperatures between 40 F and 90 F and ambient operating temperatures between 40 F and 90 F Do not install unit outdoors In garages or other sections of aircraft hangars such as offices and shops that communicate with areas used for servicing or storage keep the b
6. f 1389 35 1587 0 00 0 10 0 20 0 30 0 40 0 50 0 60 0 70 External Static Pressure IN WC 65 1140 A 60 44 1235 u E Q 55 7 1347 a 50 e 9 5 L 1 D 45 T t 1646 b L T S 4 aa 1852 asp 2116 0 00 0 10 0 20 0 30 0 40 0 50 0 60 0 70 0 80 External Static Pressure IN WC 75 1235 70 A 1323 9 65 1425 a 0 154 6 3 o m L B 55 1684 S amp 50 1852 E n 45 feet pes 2058 40 2315 0 00 0 10 0 20 0 30 0 40 0 50 0 60 0 70 0 80 External Static Pressure IN WC 13 INSTALLATION OPERATION OPERATION Prior to Operation IMPORTANT 1 To prevent premature heat exchanger failure observe heat exchanger tubes If the bottom of the tubes become red while blower and furnace are in operation check to be sure the blower has been set to the proper RPM for the application Refer to page 14 for Wiring Adjustments for Blower Motors Start up and adjustment procedures must be performed by a qualified service agency Although this unit has been assembled and fire tested at the factory the following pre operational procedures should be performed to assure proper on site operation 1 Turn off power to the unit at the disconnect switch Check that fuses or circuit breakers are in place and sized correctly Turn all hand gas valves to the OFF position 2 Remove the side control access panel 3 Checkthat the supply voltage matches the unit supply
7. which if not avoided COULD result in death or serious injury without provisions for adequate combustion air and venting 3 CAUTION Indicates a potentially hazardous situation which Combustion air must have access to the confined space if not avoided MAY result in minor or moderate injury through a minimum of two permanent openings in the 4 IMPORTANT Indicates a situation which if not avoided enclosure at least one near the bottom They should MAY result in a potential safety concern A DANGER Appliances must not be installed where they may be exposed to a potentially explosive or flammable atmosphere WARNING Gas fired heating equipment must be vented do not operate unvented A built in power exhauster is provided additional external power exhausters are not required or permitted If an existing heater is being replaced it may be necessary to resize the venting systems Improperly sized venting systems can result in vent gas leakage or the formation of condensate Refer to the National Fuel Gas Code ANSI Z223 1 NFPA 54 or CSA B149 1 latest edition Failure to follow these instructions can result in injury or death Under no circumstances should two sections of double wall vent pipe be joined together within one horizontal vent system due to the inability to verify complete seal of inner pipes All field gas piping must be pressure leak tested prior to operation Never use an open flame Use a soap solution or
8. Be sure the means of suspension is adequate to support the weight of the unit see page 16 for unit weights For proper operation the unit must be installed in a level horizontal position Clearances to combustibles as previously specified must be strictly maintained For model sizes 30 75 before lifting the heater for suspension the mounting brackets must be installed as follows for bracket accessory installation on model sizes 100 125 see the latest revision of literature 6 594 For standard left side control access remove the 3 screws and mounting bracket along the top edge of both the front and back of the unit Install the front bracket as shown in Figure 5 1 by aligning the screw holes on the bracket with the screw holes on the top edge of the unit Repeat for the bracket on the back of the unit Forright side control access remove the 3 screws and mounting bracket along the top edge of both the front and back of the unit Turn the unit over and install the front bracket as shown in Figure 5 2 by aligning the screw holes on the bracket with the screw holes on the top edge of the unit originally the bottom edge Repeat for the bracket on the back of the unit Suspension by screws lag bolts Secure the mounting brackets to the ceiling joists or truss using 1 4 screws with 1 2 washers These unit mounting brackets are slotted to accommodate joists on 16 or 24 centerlines Figure 5 1 Unit Heater in St
9. THIMBLE TYPE B DOUBLE WALL COMMON VENT TEE WITH DRIP LEG AND CLEANOUT CAP USE THIMBLE RECOMENDED THROUGH CELLING 4 EY f TYPE B DOUBLE WALL VENT CONNECTOR UPWARD SLOPE VENT 1 4 PER FOOT TOWARDS DRIP LEG I 12 MIN CATEGORY I APPLIANCE MASONRY CHIMNEY COMMON VENT FLASHING c CHIMNEY HEIGHT TYPE B DOUBLE WALL di VENT CONNECTOR UPWARD SLOPE VENT 1 4 PER FOOT TOWARDS CHIMNEY CATEGORY I APPLIANCE E 3 MAX 6 583 5 11 INSTALLATION GAS CONNECTIONS A WARNING All field gas piping must be pressure leak tested prior to operation Never use an open flame Use a soap solution or equivalent for testing Gas pressure to appliance controls must never exceed 14 W C 1 2 psi To reduce the opportunity for condensation the minimum sea level input to the appliance as indicated on the serial plate must not be less than 5 below the rated input or 5 below the minimum rated input of dual rated units A CAUTION Purging of air from gas lines should be performed as described in the National Fuel Gas Code ANSI Z223 1 NFPA 54 latest edition or in Canada CSA B149 codes When leak testing the gas supply piping system the appliance and its combination gas control must be
10. USED ON PROPELLER MODELS 100 AND LARGER 6 TWO SWITCHES 30 75 ONE SWITCH 100 125 NOT USED ON 150 400 UNITS WH NEUTRAL MED BK HI RED LO ATTACH WIRES NOT USED TO PARK TERMINALS UNITS ARE FACTORY WIRED FOR HIGH SPEED OPERATION WIRING LEGEND CAUTION FACTORY WIRING LINE 22V o INDICATES TERMINAL FAILURE TO WIRE THIS UNIT ACCORDING TO THIS WIRING DIAGRAM MAY RESULT Te es BOARD CONNECTION IN INJURY TO THE INSTALLER OR USER FOR DEVIATIONS CONTACT THE FACTORY WIRE NUT 18 6 583 5 SERIAL amp MODEL NUMBER REPLACEMENT PARTS Model Number Designations Remove access cover to locate HD 45 A S 01 HD Tubular Power Vented Propeller Unit Control Code HDB Tubular Power 11 Single Stage Natural Gas Vented BI t ente ower Uni 12 Two Stage MBH Input Natural Gas 30 30 000 Btu hr input 21 Single Stage 45 45 000 Btu hr input Propane Gas 60 60 000 Btu hr input 22 Two Stage 75 75 000 Btu hr input Propane Gas 100 100 000 Btu hr input 125 125 000 Btu hr input Power Code 01 115 volt 60 hertz Heat Exchanger Type single phase A Aluminized Ignition Type S Stainless Steel S Direct Spark Serial Number Designations Remove access cover to locate CONTROL SUPPLIER GAS VALVE SUPPLIER 01 RobertShaw 09 White Rogers 01 RobertShaw 05 Honeywell 17 United Tech 05 Honeywell 08 Fenwal 09 White Rogers YEAR OF MANUFACTURE SPO N
11. exhaust fans fireplace dampers and any other gas burning appliance to their previous conditions of use f If improper venting is observed during any of the above tests the venting system must be corrected 5 Checkto see that there are no obstructions to the intake and discharge of the unit 6 Check fan clearance Fan should not contact casing when spun by hand 7 Checkto make sure that all filters are in place and that they are installed properly according to direction of air flow if applicable 8 Perform a visual inspection of the unit to make sure no damage has occurred during installation 9 Check that all horizontal deflector blades are open a minimum of 30 as measured from vertical 10 Turn on power to the unit at the disconnect switch 11 Check the thermostat ignition control gas valve and supply fan blower motor for electrical operation If these do not function check that the wiring is per the diagram 12 Check the blower wheel for proper direction of rotation when compared to the air flow direction arrow on the blower housing if applicable Blower wheel rotation not air movement must be checked as some air will be delivered through the unit with the blower wheel running backwards 13 For blower units check the blower speed RPM Refer to Blower Adjustments for modification 14 Check the motor speed RPM 15 Check the motor voltage 16 Check the motor amp draw to make sure it does not exceed
12. 26 8 26 8 18 0 18 0 16 5 16 5 14 9 14 9 22 5 15 9 15 9 18 4 8 4 HDB100 125 35 5 20 5 22 0 7 8 7 8 Gas Connection 1 2 1 2 1 2 34 5 34 5 44 5 J 25 0 25 0 41 5 Blower 9 7 9 7 10 10 Approx Shipping Weight Ibs 92 97 151 Vent Connector Size in 3 3 4 Mounting Mounting brackets are slotted to accomodate joists on 16 or 24 centerlines PT I mms g 3075 2 22 2 o o HD HDB TT TT 9822859 100 125 2 9 88 o OW M Accessory S289 6 583 5 SERVICE MAINTENANCE TROUBLESHOOTING A WARNING Service air moving components annually a Check fan for fit on motor shaft and for damage to blades 2 Keep unit free from dust dirt grease and foreign matter When servicing or repairing this equipment use only factory paying particular attention to approved service replacement parts A complete replacement a Combustion air inlets parts list may be obtained by contacting the factory Refer b Burners and burner orifices Turn off gas ahead of the to the rating plate on the appliance for complete appliance combination gas control and shut off electric power to model number serial number and company address Any the heater Remove the access panel open the union on substitution of parts or controls not approved by the factory will the gas line and disconnect the igniter and sensor wires be at the
13. 30 45 60 75 45 4 100 125 6 Based on ANSI Z223 1 NFPA 54 2009 For reference only Table 11 2 Maximum Total Appliance Input Capacities MBh Type B Vent Connector and Type B Common Vent Diameter of Common Vent Vent 4 in 5 in 6 in 7 in Height Fani Fan Fan Fan Fan Fan Fan Fan ft Fan Nat Fan Nat Fan Nat Fan Nat 6 92 81 140 116 204 161 309 248 8 101 90 155 129 224 178 339 275 10 110 97 169 141 243 194 367 299 15 125 112 195 164 283 228 427 352 20 136 123 215 183 314 255 475 394 30 152 138 244 210 361 297 547 459 Based on ANSI Z223 1 NFPA 54 2009 For reference only Table 11 3 Maximum Total Appliance Input Capacities MBh Type B Vent Connector with Common Vent into Masonry Chimney Area of Common Vent elani 12 in 19 in 28 in 38 in ft Fan Fan Fan Fan Fans Fans Fan Nat Fan Nat Fan Nat Fan Nat 6 NA 74 NA 119 NA 178 NA 257 8 NA 80 NA 130 NA 193 NA 279 10 NA 84 NA 138 NA 207 NA 299 15 NA NA NA 152 NA 233 NA 334 20 NA NA NA NA NA 250 NA 368 30 NA NA NA NA NA 270 NA 404 Based on ANSI 2223 1 NFPA 54 2009 For reference only Figure 11 2 Common Venting into Masonry Chimney LISTED TERMINAL FLASHING m _ USE LISTED VENT HEIGHT
14. III Venting with Downward Pitch with drip leg Listed Terminal Drip leg Clean out cap A lt gt 7 y E Listed Thimble 1 4 Slope per foot down towards termination C8 For a vent termination located under an eave the distance of the overhang must not exceed 24 The clearance to combustibles above the exterior vent must be maintained at a minimum of 12 Consult the National Fuel Gas Code for additional requirements for eaves that have ventilation openings C9 Once venting is complete proceed to the section titled Installation Gas Connections 10 6 583 5 INSTALLATION VENTING Additional Requirements for Common Venting 1 2 10 11 The common vent system and all attached appliances must be Category I The vent connector should be routed in the most direct route from the units to the common vent Where two or more vent connectors enter a common gas vent or chimney flue the smaller connector shall enter at the highest level consistent with the available head room or clearance to combustible material Restrictions within the common vent such as elbows should be minimized Each elbow installed within the common portion of the venting system reduces maximum common vent capacity by 1096 refer to Tables 11 2 and 11 3 for capacity The vent connector capacities included in these tables allow for the use of two 90
15. ONLY A MOUNTING BRACKET 10 POWER VENTER SIZE 30 75 VENT PIPE CONNECTION ioo ELECTRICAL CONNECTION GAS CONNECTION D OPENING H d ACCESS PANEL REAR VIEW 14 9 BETWEEN 3 8 16 MOUNTING HOLES MODEL SIZES 100 AND 125 ONLY MOUNTING HOLES TYP G ADJUSTABLE 3 8 X 1 LONG LOUVERS 3 5 4 D s 7 OPENING J ACCESS VIEW 14 9 BETWEEN 3 8 16 MOUNTING HOLES MODEL SIZES 100 AND 125 ONLY e A POWER VENTER MOUNTS 10 0 SIZE 30 75 CONNECTION ELECTRICAL io T CONNECTIONS GAS o CONNECTION i li ACCESS len PANEL b F E rr HQ l 8 D OPENING H REAR VIEW Table 16 1 Dimensions inches HD Models HD75 HD100 125 26 8 26 8 12 2 122 16 5 14 9 10 1 7 5 18 5 16 5 14 9 10 1 7 5 18 5 185 76 76 7 8 7 8 1 2 1 2 1 2 1 2 1 2 34 5 34 5 34 5 34 5 43 0 10 10 14 14 18 0 80 85 125 18 5 Gas Connection Fan Diameter Approx Shipping Weight Ibs 55 60 Unit Side Top and Bottom Access Side Non Access Side Rear Vent Connector Combustible Materials 4 1 Service Clearance 1 18 16 Table 16 2 Dimensions inches Models HDB 60 HDB 75
16. Table 12 1 Manifold Pressure amp Gas Consumption Natural Propane Model BTU Cu Ft 1050 2500 Size Specific Gravity 0 60 1 53 Manifold Pressure In W C 3 5 10 0 CFH 28 6 12 0 Gal Hr Propane 33 Sec cu ft 126 300 Orifice Drill Size 49 CFH 42 9 Gal Hr Propane Sec cu ft 84 Orifice Drill Size 49 CFH Gal Hr Propane Sec cu ft Orifice Drill Size CFH Gal Hr Propane Sec cu ft Orifice Drill Size CFH Gal Hr Propane Sec cu ft No of Orifices 30 Orifice Drill Size CFH Gal Hr Propane Sec cu ft Orifice Drill Size D Capacities in Cubic Feet per Hour through Schedule 40 pipe with maximum 0 3 W C pressure drop with up to 14 W C gas pressure Specific gravity is 0 60 for Natural gas and 1 50 for Propane gas For Pipe Capacity with Propane Gas divide Natural gas capacity by 1 6 Example What is the propane gas pipe capacity for 60 feet of 1 1 4 pipe The Natural gas capacity is 400 CFH Divide by 1 6 to get 250 CFH for Propane gas 12 6 583 5 INSTALLATION ELECTRICAL CONNECTIONS ELECTRICAL CONNECTIONS A WARNING Disconnect power supply before making wiring connections to prevent electrical shock and equipment damage All appliances must be wired strictly in accordance with wiring diagram furnished with the appliance Any wiring different from the wiring diagram could result in a hazard to persons and property Any original factory w
17. degree elbows or turns For each additional elbow the vent connector capacity shall be reduced by 10 Refer to NFPA54 IFEC tables for capacity ratings The common vent cross sectional area must be equal to or greater than the largest vent connector cross sectional area If all appliances are located on one level of the building the vent height shall be measured from the highest draft hood or vent connector to be installed within the common vent system Refer to Figures 11 1 and 11 2 All units must be vented in strict accordance of the common venting Tables 11 1 through 11 3 All masonry chimneys must comply with all applicable local and national codes When combining multiple vent connectors into a manifold prior to the vertical portion of the common vent the size of the common vent manifold and the common vent shall be determined by applying a 10 reduction 90 x maximum vent capacity from Table 11 2 or 11 3 to the common vent capacity part of the common vent tables The length of the common vent manifold Lm may not exceed 18 inches per inch of manifold diameter Refer to the National Fuel Gas Code for instructions on multi level common venting and exterior masonry chimneys as well as additional installation of the listed applications Figure 11 1 Common Venting into Double Wall B Vent Table 11 1 Maximum Vent Connector Horizontal Run ft Type B Vent Connector Connector Model Max Horiz Run Dia 3
18. equivalent for testing Gas pressure to appliance controls must never exceed 14 W C 1 2 psi To reduce the opportunity for condensation the minimum sea level input to the appliance as indicated on the serial plate must not be less than 5 below the rated input or 5 below the minimum rated input of dual rated units Disconnect power supply before making wiring connections to prevent electrical shock and equipment damage All appliances must be wired strictly in accordance with wiring diagram furnished with the appliance Any wiring different from the wiring diagram could result in a hazard to persons and property Any original factory wiring that requires replacement must be replaced with wiring material having a temperature rating of at least 105 C Ensure that the supply voltage to the appliance as indicated on the serial plate is not 5 greater than the rated voltage When servicing or repairing this equipment use only factory approved service replacement parts A complete replacements parts list may be obtained by contacting the factory Refer to the rating plate on the appliance for complete appliance model number serial number and company address Any substitution of parts or controls not approved by the factory will be at the owner s risk 6 583 5 provide a free area of one square inch per 1 000 BTU Hr input rating of the unit with a minimum of 100 square inches for each opening whichever is grea
19. isolated during any pressure testing in excess of 14 W C 1 2 psi The unit should be isolated from the gas supply piping system by closing its field installed manual shut off valve This manual shut off valve should be located within 6 of the heater Turn off all gas before installing appliance IMPORTANT To prevent premature heat exchanger failure the input to the appliance as indicated on the serial plate must not exceed the rated input by more than 5 Figure 12 1 Recommended Sediment Trap Manual Shut off Valve Installation Side or Bottom Gas Connection GAS SUPPLY LINE am MANUAL GROUND Y SHUT OFF UNION 1 VALVE GAS NE SUPPLY LINE 1 5 jn Um Nl E D H bat Dus 4 CONTROLS PLUGGED 3 1 8 NPT TEST MIN GAGE CONNECTION SEDIMENT TRAP 1 Installation of piping must conform with local building codes or in the absence of local codes with the National Fuel Gas Code ANSI Z223 1 NFPA 54 latest edition In Canada installation must be in accordance with CSA B149 1 2 Piping to units should conform with local and national requirements for type and volume of gas handled and pressure drop allowed in the line Refer to Table 12 1 to determine the cubic feet per hour CFH for the type of gas and size of unit to be installed Using this CFH value and the
20. length of pipe necessary determine the pipe diameter from Table 12 2 Where several units are served by the same main the total capacity CFH and length of main must be considered Avoid pipe sizes smaller than 1 2 Table 12 2 allows for a 0 3 W C pressure drop in the supply pressure from the building main to the unit The inlet pressure to the unit must be 6 7 W C for natural gas and 11 14 W C for propane gas When sizing the inlet gas pipe diameter make sure that the unit supply pressure can be met after the 0 3 W C has been subtracted If the 0 3 W C pressure drop is too high refer to the Gas Engineer s Handbook for other gas pipe capacities 3 Install a ground joint union with brass seat and a manual shut off valve adjacent to the unit for emergency shut off and easy servicing of controls including a 1 8 NPT plugged tapping accessible for test gauge connection See Figure 12 1 4 Provide a sediment trap before each unit in the line where low spots cannot be avoided See Figure 12 1 5 When Pressure Leak testing pressures above 14 W C 1 2 psi close the field installed shut off valve disconnect the appliance and its combination gas control from the gas supply line and plug the supply line before testing When testing pressures 14 W C 1 2 psi or below close the manual shut off valve on the appliance before testing D Manual shut off valve is in the OFF position when handle is perpendicular to pipe
21. or restriction leakage corrosion and other deficiencies which could cause an unsafe condition The vent pipe should be galvanized steel or other suitable corrosion resistant material except for Horizontal Category vent systems which will be covered in Section C Horizontal Category 1 Vent System Installation Follow the National Fuel Gas Code for minimum thickness of vent material The minimum thickness for connectors varies depending on the pipe diameter Do not vent unit with PVC or other forms of plastic venting material All heaters come with a factory installed vent adapter for attaching the vent pipe to the heater Attach the vent pipe to the adapter with 3 non corrosive screws Drill pilot holes through the vent pipe and adapter prior to screwing in place Refer to Table 6 1 for total equivalent vent pipe lengths making the vent system as straight as possible The equivalent length of a 3 elbow is 1 and for a 4 elbow is 5 Table 6 1 Vent Pipe Diameters and Total Equivalent Vent Pipe Lengths For Horizontal Venting Systems Maximum Eqv Length Minimum odel Size Eqv Length Vent Pipe Diameter 30 75 3 30 A5 A6 A7 A8 A9 A10 100 125 3 30 A minimum of 12 straight pipe is recommended from the flue outlet before turns in the vent pipe Horizontal sections of vent pipe are to be installed with a minimum downward slope from the appliance of 1 4 inch per foot and s
22. the gas supply piping system by closing its field installed manual shut off valve This manual shut off valve should be located within 6 of the heater Turn off all gas before installing appliance Ensure that the supply voltage to the appliance as indicated on the serial plate is less than 5 below the rated voltage Check the gas inlet pressure at the unit upstream of the combination gas control The inlet pressure should be 6 7 W C on natural gas or 12 14 W C on propane If inlet pressure is too high install an additional pressure regulator upstream of the combination gas control Service or repair of this equipment must be performed by a qualified service agency Do not attempt to reuse any mechanical or electronic ignition controllers which has been wet Replace defective controller IMPORTANT To prevent premature heat exchanger failure do not locate ANY gas fired appliances in areas where corrosive vapors i e chlorinated halogenated or acidic are present in the atmosphere To prevent premature heat exchanger failure the input to the appliance as indicated on the serial plate must not exceed the rated input by more than 5 To check most of the Possible Remedies in the trouble shooting guide listed in Table 17 1 refer to the applicable sections of the manual BEFORE YOU BEGIN A CAUTION 1 All literature shipped with this unit should be kept for future use for servicing or service di
23. this appliance is hazardous IMPORTANT The use of this manual is specifically intended for a qualified installation and service agency All installation and service of these units must be performed by a qualified installation and service agency Inspection on Arrival 1 Inspect unit upon arrival In case of damage report it immediately to the transportation company and your local Modine sales representative 2 Check rating plate on unit to verify that power supply meets available electric power at the point of installation 3 Inspect unit upon arrival for conformance with description of product ordered including specifications where applicable Table of Contents Inspection on 1 Special 5 2 SI Metric Conversion 3 Betore You Begin sini eR RR VERSER Edu 3 anale PEE 4 Combustible Material and Service Clearances 4 Unit MOuntING 2 use n RE es Bb wed eee teers 5 Unit Installation noh TRE DDR hm 5 Venting nberce peer bebe pe 6 Gas 5 12 Wiring Blower Speed Adjustment 13 Operation ree EET 14 Unit Components pedo ei ai ete eee 15 DIMENSIONS 221 i RERO ere env bedded QU 16 17 Unit Wiring Diagr
24. voltage listed on the Model Identification plate Verify that all wiring is secure and properly protected Trace circuits to insure that the unit has been wired according to the wiring diagram 4 Checkto insure that the venting system is installed correctly and free from obstructions Before you start use the following steps to verify that the venting system is adequately sized a Sealany unused openings in the venting system b Inspect the venting system for proper size and horizontal pitch as required in the National Fuel Gas Code ANSI Z223 1 NFPA 54 or CSA B149 1 Installation Code latest edition and these instructions Determine that there is no blockage or restriction leakage corrosion and other deficiencies which could cause an unsafe condition c Insofar as practical close all building doors and windows and all doors between the space in which the appliance s connected to the venting system are located and other spaces of the building Turn on clothes dryers and any exhaust fans such as range hoods and bathroom exhausts so they shall operate at maximum speed Do not operate a summer exhaust fan Close fireplace dampers d Follow the lighting instructions Place the appliance being inspected in operation Adjust thermostat so that the appliance will operate continuously e After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above return doors windows
25. 9749 5H79751 5H79869 NA NA NA HD 75 5H75038 5H75769 2 5H75002 7 5H75029 5H75030 4 5H79636 5H79749 5H79751 5H79869 5H79804 5H79748 5H79871 HDB 75 5H75038 5H75769 2 5H75002 7 5H75029 5H75030 4 5H79636 5H79749 5H79751 5H79869 5H79804 5H79748 5H79871 HD 100 5H79795 5H75769 2 5H75002 4 5H75029 5H79441 9 5H79636 5H79749 5H79751 5H79869 5H79804 5H79748 5H79871 HDB 100 5H79795 5H75769 3 5H75002 4 5H75029 5H79441 9 5H79636 5H79749 5H79751 5H79869 5H79804 5H79748 5H79871 HD 125 5H79795 5H75769 1 5H75002 4 5H75029 5H79441 9 5H79636 5H79749 5H79751 5H79869 5H79804 5H79748 5H79871 125 5H79795 5H75769 2 5H75002 4 5H75029 5H79441 9 5H79636 5H79749 5H79751 5H79869 5H79804 5H79748 5H79871 6 583 5 19 COMMERCIAL WARRANTY Seller warrants its products to be free from defects in material and workmanship EXCLUSIVE HOWEVER of failures attributable to the use of materials substituted under emergency conditions for materials normally employed This warranty covers replacement of any parts furnished from the factory of Seller but does not cover labor of any kind and materials not furnished by Seller or any charges for any such labor or materials whether such labor materials or charges thereon are due to replacement of parts adjustments repairs or any other work done This warrant
26. As Modine Manufacturing Company has a continuous product improvement program it reserves the right to change design and specifications without notice TP MODINE Commercial Products Group Modine Manufacturing Company 1500 DeKoven Avenue Racine WI 53403 Phone 1 800 828 4328 HEAT www modinehvac com Modine Manufacturing Company 2013
27. BY BUYER IN ANY UNCHANGED CONDITION OR WITHIN ONE HUNDRED TWENTY SIX MONTHS FROM DATE OF SHIPMENT FROM SELLER WHICHEVER Heat Exchangers Low Intensity Infrared Units Compressors Condensing Units for Cassettes FIVE YEARS FROM DATE OF FIRST BENEFICIAL USE BY BUYER OR ANY OTHER USER WITHIN FIVE YEARS FROM DATE OF RESALE BY BUYER OR ANY OTHER USER WITHIN FIVE YEARS FROM DATE OF RESALE BY BUYER IN ANY UNCHANGED CONDITION OR WITHIN SIXTY SIX MONTHS FROM DATE OF SHIPMENT FROM SELLER WHICHEVER OCCURS FIRST Burners Low Intensity Infrared Units TWO YEARS FROM DATE OF FIRST BENEFICIAL USE BY BUYER OR ANY OTHER USER WITHIN Other TWO YEARS FROM DATE OF RESALE BY BUYER IN ANY UNCHANGED CONDITION OR WITHIN Components excluding Heat Exchangers Coils Condensers Burners Sheet Metal THIRTY MONTHS FROM DATE OF SHIPMENT FROM SELLER WHICHEVER OCCURS FIRST Heat Exchangers Coils Indoor and Outdoor Duct Furnaces and System Units Steam Hot Water Units Oil Fired Units Electric Units Cassettes Vertical Unit Ventilators Ventilators Geothermal Units ONE YEAR FROM DATE OF FIRST BENEFICIAL USE BY BUYER OR ANY OTHER USER WITHIN ONE YEAR FROM DATE OF RESALE BY BUYER IN ANY UNCHANGED CONDITION OR WITHIN EIGHTEEN MONTHS FROM DATE OF SHIPMENT FROM SELLER WHICHEVER OCCURS FIRST Compressors Vertical Unit Ventilators Ventilators Geothermal Units Burners High Intensity Infrared Units Sheet Metal Parts All Products
28. ESET FROM LOCKOUT MULTIPLE RETRY W AUTO RESET FROM LOCKOUT CALL FOR FANO CALL FOR e LOWvormgE THERMOSTAT BY OTHERS PRESSURE i SWITCH LIMIT LIMIT CONTROL FLAME ROLLOUTS CONTROL SEE NOTE 5 SEE NOTE 6 GR FLAME I oO SENSOR GND E C2 wel 115 60 2 1 POWER L1 BK CIRCUIT BREAKER BY OTHERS J inErER NOTE7 jug IGNITION CONTROL SINGLE STAGE DIRECT SPARK IGNITION SHUT OFF MULTIPLE RETRY W AUTO RESET FROM LOCKOUT WHITE ROGERS GAS VALVE COM SENSO ae 115V 60HZ 19 POWER SENSOR 115v eol q L2 WH a LT BK CIRCUIT BREAKER BY OTHERS SPARK IGNITOR CALL FOR FANO 1ST STAGEO 2ND STAGEO 1 1 Towvouace THERMOSTAT BYOTHERS PRESSURE SWITCH LIMIT LIMIT CONTROL CONTROL SEE NOTE 5 IGNITION CONTROL 5H0799630002 REV M O STAGE DIRECT SPARK IGNITION TW j 100 SHUT OFF MULTIPLE RETRY W AUTO RESET FROM LOCKOUT NOTES TO INSTALLER 1 ALL WIRING MUST COMPLY WITH NATIONAL ELECTRIC CODE AND ALL LOCAL CODES MOTOR LEAD COLOR FOR DIRECT DRIVE BLOWER MOTORS 2 ALL COMPONENTS MUST AGREE WITH THEIR RESPECTIVE POWER SOURCE 3 VERIFY THE POWER SOURCE AND THE UNIT POLARITY 4 USETYPE 105 C REPLACEMENT WIRE 300V OR GREATER 5
29. Fuel Gas Code are followed B9 Vertical vents must terminate a minimum horizontal and vertical distance from roof lines and adjacent walls or Gini DRIES obstructions These minimum distances are outlined as AND CLEANQUT CAP follows based on National Fuel Gas Code requirements for vents with diameters less than 12 e For double wall vent pipe and 8 or greater horizontal distance to any vertical wall or similar obstruction the p _ a vent must terminate above the roof in accordance with WE p Figure 8 1 and Table 8 1 x pu H MIN TN STA SEE TABLE 8 1 e For double wall vent pipe and less than 8 horizontal X s distance to any vertical wall or similar obstruction the ae E x V vent must terminate at least 2 above the highest point D where it passes through a roof of a building and at least USE LISTED THIMBLE 2 higher than any portion of a building within a horizontal distance of 10 See Figure 8 1 Table 8 1 Minimum Height from Roof to Lowest SNS Discharge Opening E gm 1 MN NUSE LISTED THIMBLE THROUGH CEILING Rise X in Roof Pitch Min Height H ft Flat to 6 12 6 12 to 7 12 7 12 to 8 12 8 12 to 9 12 9 12 to 10 12 10 12 to 11 12 11 12 to 12 12 12 12 to 14 12 14 12 to 16 12 16 12 to 18 12 18 12 to 20 12 20 12 to 21 12 LISTED TERMINAL
30. TP MODINE 6 583 5 5H80004 July 2013 INSTALLATION AND SERVICE MANUAL A WARNING 1 Improper installation adjustment alteration service or maintenance can cause property damage injury or death and could cause exposure to substances which have been determined by various state agencies to cause cancer birth defects or other reproductive harm Read the installation operating and maintenance instructions thoroughly before installing or servicing this equipment 2 Do not locate ANY gas fired units in areas where chlorinated halogenated or acid vapors are present in the atmosphere These substances can cause premature heat exchanger failure due to corrosion which can cause property damage serious injury or death FOR YOUR SAFETY WHAT TO DO IF YOU SMELL GAS Open windows Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you can not reach your gas supplier call your fire department gas fired unit heaters model HD and HDB CERTIFIED All models approved for use in California by the and in Massachusetts Unit heater is certified for residential and commercial applications FOR YOUR SAFETY The use and storage of gasoline or other flammable vapors and liquids in open containers in the vicinity of
31. UMBER e 30010017091098123410000 Number varies from 0000 to 9999 MOTOR SUPPLIER Same as Requirements Each unit within same week of 05 Universal 18 Franklin FAN VENDOR CODE Planning Shop Calendar manufacture is to have unique number 15 Marathon 38 A O Smith Morrison 01 Revcor Lau 08 Brookside Air Drive Replacement Parts When requesting parts please contact your local representative Please have full model and serial number available If you require assistance in locating your representative please call the number located on the back page Figure 22 1 Common Replacement Parts The list is subject to change Please refer to unit mounted parts list for most up to date list n Flame Ignition Combination Gas Ignition Combination Gas Model Power Limit Control Roll out Trans Pressure Igniter Control Valve 1 Stage Control Valve 2 Stage Size Exhauster Switch Switch former Switch witc 1 Stage Code 11 Code21 2 Stage coge 12 Code 22 HD 30 5H75038 5H75769 1 5H75002 7 5H75029 5H75030 3 5H79636 5H79749 5H79751 5H79869 NA NA NA HD 45 5H75038 5H75769 1 5H75002 7 5H75029 5H75030 3 5H79636 5H79749 5H79751 5H79869 NA NA NA 60 5H75038 5H75769 2 5H75002 7 5H75029 5H75030 3 5H79636 5H79749 5H79751 5H79869 NA NA NA HDB 60 5H75038 5H75769 4 5H75002 7 5H75029 5H75030 3 5H79636 5H7
32. agnostics Leave manual with the owner Do not discard any literature shipped with this unit Consult piping electrical and venting instructions in this manual before final installation Do not attach ductwork air filters or polytubes to any propeller unit heater In the U S the installation of these units must comply with the National Fuel Gas Code ANSI Z223 1 latest edition also known as NFPA 54 and other applicable local building codes In Canada the installation of these units must comply with local plumbing or waste water codes and other applicable codes and with the current code CSA B149 1 1 Allinstallation and service of these units must be performed by a qualified installation and service agency only as defined in ANSI Z223 1 NFPA 54 latest edition or in Canada by a licensed gas fitter 2 This unit is certified with the controls furnished For replacements parts please order according to the replacement parts list on serial plate Always know your model and serial numbers Modine reserves the right to substitute other authorized controls as replacements 3 Unitis balanced for correct performance Do not alter fan or operate motors at reduced speed 4 Information on controls is supplied separately 5 The same burner is used for natural and propane gas SI METRIC CONVERSION FACTORS To Convert W C Multiply By 0 249 To Obtain feet 0 305 F F 32 x 5 9 C Gal Hr
33. am lisse 18 Serial Model Number Replacement Parts 19 Commercial Warranty 20 THIS MANUAL IS THE PROPERTY OF THE OWNER PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB SPECIAL PRECAUTIONS SPECIAL PRECAUTIONS THE INSTALLATION AND MAINTENANCE INSTRUCTIONS IN THIS MANUAL MUST BE FOLLOWED TO PROVIDE SAFE EFFICIENT AND TROUBLE FREE OPERATION IN ADDITION PARTICULAR CARE MUST BE EXERCISED REGARDING THE SPECIAL PRECAUTIONS LISTED BELOW FAILURE TO PROPERLY ADDRESS THESE CRITICAL AREAS COULD RESULT IN PROPERTY DAMAGE OR LOSS PERSONAL INJURY OR DEATH THESE INSTRUCTIONS SUBJECT TO ANY MORE RESTRICTIVE LOCAL OR NATIONAL CODES y CAUTION All literature shipped with this unit should be kept for future use for servicing or service diagnostics Do not discard any literature shipped with this unit Consult piping electrical and venting instructions in this manual before final installation Do not attach ductwork air filters or polytubes to any HAZARD INTENSITY LEVELS 1 DANGER Indicates an imminently hazardous situation which if not avoided WILL result in death or serious injury propeller unit heater Clearances to combustible materials are critical Be sure to follow all listed requirements Do not locate units in tightly sealed rooms or small 2 WARNING Indicates a potentially hazardous situation compartments commonly referred to as confined spaces
34. andard Mounting Configuration 30 75 Units Only Figure 5 2 Unit Heater Turned 180 30 75 units only Access panel and heated air outlet change sides 5b Suspension by threaded rod The unit can also be hung with threaded rod utilizing the same mounting brackets Attach the threaded rod to the unit mounting brackets securing with a top and bottom nut For model sizes 100 125 the units are designed to be suspended by threaded rod without the use of brackets On each piece of 3 8 threaded rod used screw a nut a distance of about one inch onto the end of the threaded rods that will be screwed into the unit heater Place a washer over the end of the threaded rod and screw the threaded rod into the unit heater weld nuts on the top of the heater at least 5 turns and no more than 10 turns Tighten the nut first installed onto the threaded rod to prevent the rod from turning Next drill holes into a steel channel or angle iron at the same centerline dimensions as those chosen for the heater being installed The steel channels or angle iron pieces need to span and be fastened to appropriate structural members Cut the threaded rods to the preferred length push them through the holes in the steel channel or angle iron and secure with washers and lock nuts lock washers and nuts or a washer with double nut arrangement NOTE A pipe hanger adapter kit shown in Figur
35. ations unless unit is properly guarded to provide user protection from moving parts and 5 measured from the bottom of the unit to the floor in residential applications Be sure no obstructions block air intake and discharge of unit heaters The minimum distance from combustible material is based on the combustible material surface not exceeding 160 F Clearance from the top of the unit may be required to be greater than the minimum specified if heat damage other than fire may occur to materials above the unit heater at the temperature described Allow 18 of clearance at rear or 6 beyond end of motor at rear of unit whichever is greater and access side to provide ample air for combustion and proper operation of fan Installation must conform with local building codes or in the absence of local codes with the National Fuel Gas Code ANSI Z223 1 NFPA 54 latest edition In Canada installation must be in accordance with CSA B149 1 Purging of air from gas supply line should be performed as described in the National Fuel Gas Code ANSI Z223 1 NFPA 54 latest edition In Canada installation must be in accordance with CSA B149 1 SPECIAL PRECAUTIONS SI METRIC CONVERSION FACTORS A CAUTION When leak testing the gas supply piping system the appliance and its combination gas control must be isolated during any pressure testing in excess of 14 W C 1 2 psi The unit should be isolated from
36. be joined together within one horizontal vent system due to the inability to verify complete seal of inner pipes A CAUTION Installation must conform with local building codes or in the absence of local codes with the National Fuel Gas Code ANSI 2223 1 NFPA 54 latest edition In Canada installation must be in accordance with CSA B149 1 Model HD HDB unit heaters must be vented with the proper passageway as described in these instructions to convey flue gases from the unit or the vent connector to the outside atmosphere The venting instructions are organized in sections based on installation type The sections are identified as follows Instructions Section Applicable Installation Instructions by Vent System Type A General instructions for ALL installations HORIZONTAL Category Ill vent systems B VERTICAL Category 1 vent systems The difference between Vertical Category and Horizontal Category III will be identified in Section A General Instructions All Units Section A General Instructions All Units Al A2 A4 If the unit heater being installed is replacing existing equipment and using the existing vent system from that equipment inspect the venting system for proper size and horizontal pitch as required in the National Fuel Gas Code ANSI Z223 1 NFPA 54 or CSA B149 1 Installation Code latest edition and these instructions Determine that there is no blockage
37. e 5 3 is available as an accessory One kit consists of two drilled 3 4 IPS pipe caps and two 3 8 16 x 1 3 4 capscrews to facilitate threaded pipe suspension Two kits would be required to install one unit 5c Shelf mounted units The unit heater can also be installed on a shelf The mounting brackets will need to be attached to the heater the same manner as explained in note 4 however to mount on a shelf the brackets must go on the bottom of the heater The brackets must be affixed to the shelf using similar screws 1 4 screw with 1 2 washer as overhead joist or truss mounting Be sure all clearance to combustible requirements are met Figure 5 3 Unit Heater Suspension Methods E ey Threaded Rod Pipe Adaptor Kit 6 583 5 5 INSTALLATION VENTING WARNING Gas fired heating equipment must be vented do not operate unvented A built in power exhauster is provided additional external power exhausters are not required or permitted If an existing heater is being replaced it may be necessary to resize the venting systems Improperly sized venting systems can result in vent gas leakage or the formation of condensate Refer to the National Fuel Gas Code ANSI Z223 1 NFPA 54 or CSA B149 1 Installation Code latest edition Failure to follow these instructions can result in serious injury or death Under no circumstances should two sections of double wall vent pipe
38. ess Horizontally From Adjacent Building or Building LISTED TERMINAL 2 FEET MIN 10 FEET OR LESS TO WALL OR ADJOINING BUILDING HEIGHT ABOVE ANY PORTION OF WALL OR ADJOINING BUILDING WITHIN 10 FEET 5 FEET MIN 3 FEET MIN ROOF FLASHING WAY USE LISTED THIMBLE THROUGH CEILING TEE WITH DRIP LEG AND CLEANOUT CAP DOWNWARD SLOPE 1 4 PER FOOT RECOMMENDED TOWARD DRIP LEG 10 FEET OR LESS 8 2 FEET MIN LISTED TERMINAL HEIGHT ABOVE ANY ROOF SURFACE WITHIN 10 FEET ROOF FLASHING USE LISTED THIMBLE THROUGH ROOF 2 FEET MINIMUM FOR NON RESIDENTIAL INSTALLATIONS BUT SIZE ACCORDING TO EXPECTED SNOW DEPTH RECOMMENDED TEE WITH DRIP LEG AND CLEANOUT CAP DOWNWARD SLOPE 1 4 PER FOOT TOWARD DRIP LEG USE LISTED THIMBLE THROUGH CEILING TEE WITH DRIP LEG AND CLEANOUT CAP DOWNWARD SLOPE 1 4 PER FOOT TOWARD DRIP LEG 2 FEET MINIMUM FOR NON RESIDENTIAL INSTALLATIONS BUT SIZE ACCORDING TO EXPECTED SNOW DEPTH B10 Once venting is complete proceed to the section titled Installation Gas Connections 6 583 5 INSTALLATION VENTING Section C Horizontal Category 11 Vent System Installation C1 This section applies to horizontally vented Category III vent systems and is in addition to Section A General Instructions All Units C2 All heaters that are horizontally vented perform as a Category IIl app
39. he structural support at the unit location site is adequate to support the unit s weight For proper operation the unit must be installed in a level horizontal position 4 Do not install units in locations where the flue products can be drawn into the adjacent building openings such as windows fresh air intakes etc Table 4 1 Clearances Unit Side Recommended Service Clearance Clearance To Combustible Materials Top and Bottom 1 1 Access Side 18 18 Non Access Side 1 1 18 18 Vent Connector 4 4 5 Be sure that the minimum clearances to combustible materials and recommended service clearances are maintained Units are designed for installation with the minimum clearances as shown in Table 4 1 6 Do not install units in locations where the gas ignition system is exposed to water spray rain or dripping water 7 Mounting Height measured from bottom of unit at which unit heaters are installed is critical Refer to mounting height and heat throw data on page 15 of this manual The maximum mounting height for any unit is that height above which the unit will not deliver heated air to the floor Combustion Air Requirements The National Fuel Gas Code defines an unconfined space as a space whose volume is greater than 50 cubic feet per 1 000 Btu Hr input of the installed appliance s A confined space is 50 cubic feet or less per 1 000 Btu Hr input of the installed appliance s It i
40. ing 3 4 long sheet metal screws attach the cap to the pipe Do not over tighten How to connect a single wall vent system to double wall type B vent pipe 1 Slide the single wall pipe inside the inner wall of the double wall pipe 2 Drill 3 holes through both walls of the single and double wall vent pipes Using 3 4 sheet metal screws attach the two pieces of pipe Do not over tighten 3 The gap between the single and double wall pipe must be sealed but it is not necessary to fill the full volume of the annular area To seal run a large bead of 400 F silastic around the gap A12 Vent termination clearances must be maintained Table 7 1 Vent Termination Clearances Minimum Clearances for Vent Terminal Location Combustion air inlet of another appliance Door window gravity air inlet or any building opening Electric meter gas meter gas regulator and relief equipment Gas regulator 6 feet all directions 4 feet horizontal and below 1 foot above 4 feet horizontal U S 6 feet horizontal Canada 3 feet horizontal U S 6 feet horizontal Canada 6 feet all directions 7 feet all directions 3 feet above Adjoining building or parapet wall Adjacent public walkways Grade ground level Do not terminate the vent directly above a gas meter or regulator The vent must be at least 6 higher than anticipated snow depth A13 Do NOT use dampers or other devices in the vent or combust
41. ion air pipes A14 Precautions must be taken to prevent degradation of building materials by flue products A15 Single wall vent pipe must not pass through any unoccupied attic inside wall concealed space or floor A16 Uninsulated single wall vent pipe must not be used outdoors for venting appliances in regions where the 99 winter design temperature is below 32 F A17 The vent terminal must be Table 7 2 Vent Terminals Model Size Modine PN Other Listed Terminals 30 75 5H0722850005 Gary Steel 1092 100 125 5H0722850001 Gary Steel 1092 6 583 5 A18 In addition to following these General Instructions specific instructions for Vertical Category or Horizontal Category vent systems must also be followed Table 7 3 outlines the differences Table 7 3 ANSI Unit Heater Venting Requirements Description Venting Requirements Negative vent pressure Non condensing Follow standard venting requirements 1 Il Negative vent pressure Condensing Condensate must be drained Positive vent pressure Non condensing Vent must be gas tight Positive vent pressure Condensing Vent must be liquid and gastight Condensate must be drained Note Vent connectors serving Category appliances shall not be connected into any portion of mechanical draft systems operating under positive pressure Vertical Category Vent System Determination e Vertical vent systems terminate vertically up
42. iring that requires replacement must be replaced with wiring material having a temperature rating of at least 105 C Ensure that the supply voltage to the appliance as indicated on the serial plate is not 5 greater than rated A CAUTION Ensure that the supply voltage to the appliance as indicated on the serial plate is not 5 less than the rated voltage All field installed wiring must be done in accordance with the National Electrical Code ANSI NFPA 70 latest edition or Canadian Electrical Code CSA C22 1 Part 1 or local codes Unit must be electrically grounded according to these codes If any of the original wire supplied with the heater must be replaced replace it with wiring material having a temperature rating of at least 105 C The power to these unit heaters should be protected with a circuit breaker Location of thermostat should be determined by heating requirements and be mounted on an inside wall about 5 above floor level where it will not be affected by heat from the unit or other sources or drafts from frequently opened doors See instructions packed with thermostat Wiring Adjustments for Blower Motors The blowers used on Modine HDB units are direct drive and equipped with three speed motors Air temperature rise of the unit is determined by the speed setting and the amount of static pressure in the system Units are normally shipped with motors set at high speed Motor speed is changed by connecting the m
43. l Units B2 Vertical vent systems terminate vertically and must be sized in accordance with the National Fuel Gas Code ANSI Z223 1 NFPA 54 latest edition B3 The horizontal portion of the vent run cannot exceed 7596 IF DISTANCE TO ADJACENT WALLIS of the vertical rise Example If the vent height is 10 feet TERMINATE AT LEAST 2 FEET ABOVE the ena portion of the vent system cannot exceed 7 5 REFER TO TABLE 01 F R feet 4 It is recommended to install a tee with drip leg and clean out ROOF FLASHING LISTED TERMINAL cap as shown in Figure 8 1 B5 The vent terminates a minimum of 5 above the vent connector on the unit B6 All vertically vented heaters that are Category must be connected to a chimney or vent complying with a recognized standard or a lined masonry or concrete chimney with a material acceptable to the authority having jurisdiction Venting into an unlined masonry chimney is not permitted Refer to the National Fuel Gas Code for common venting P EE EE and pages 11 12 of this manual _ YSE USTED THIELE B7 Use a listed vent terminal to reduce down drafts and A AND ROOF moisture in the vent B8 Double wall vent pipe is recommended although single wall can be used if the requirements of the National
44. liance Category IIl venting has special venting requirements as follows e All residential horizontally vented Category III heaters must be vented with an agency certified UL1738 Category Ill venting system Agency certified Category III venting systems are available from your local vent pipe distributor Follow the agency certified Category III vent manufacturer s instructions for installation e For commercial and industrial horizontally vented heaters you may use either agency certified Category Ill venting systems as noted above or single wall galvanized or stainless steel vent pipe For single wall vent systems one continuous section of double wall vent pipe may be used within the vent system to pass through the wall to the listed terminal Refer to instruction A10 in Section A General Instructions All Units for attaching double wall pipe to single wall pipe If single wall vent pipe is used all seams and joints must be sealed with metallic tape or silastic suitable for temperatures up to 400 F Wrap the tape two full turns around the vent pipe All horizontal Category 1 vents must be terminated with listed vent cap The cap must terminate a minimum distance from the external wall as summarized in Table 10 1 Table 10 1 Minimum Length Between External Wall and Vent Model Size Min Length Application Residential amp Commercial Residential Commercial Refer to Figure 10 2 and 10 3
45. llowance or field labor participation Seller will not honor any expenses incurred in its behalf with regard to repairs to any of Seller s products No credit shall be issued for any defective part returned without proper written authorization including but not limited to model number serial number date of failure etc and freight prepaid OPTIONAL SUPPLEMENTAL WARRANTY Provided a supplemental warranty has been purchased Seller extends the warranty herein for an additional four 4 years on certain compressors Provided a supplemental warranty has been purchased Seller extends the warranty herein for an additional four 4 years or nine 9 years on certain heat exchangers EXCLUSION OF CONSUMABLES amp CONDITIONS BEYOND SELLER S CONTROL This warranty shall not be applicable to any of the following items refrigerant gas belts filters fuses and other items consumed or worn out by normal wear and tear or conditions beyond Seller s control including without limitation as to generality polluted or contaminated or foreign matter contained in the air or water utilized for heat exchanger condenser cooling or if the failure of the part is caused by improper air or water supply or improper or incorrect sizing of power supply APPLICABLE WARRANTY PERIOD TEN YEARS FROM DATE OF FIRST BENEFICIAL USE BY BUYER OR ANY OTHER USER WITHIN TEN YEARS FROM DATE OF RESALE BY BUYER OR ANY OTHER USER WITHIN TEN YEARS FROM DATE OF RESALE
46. nd 125 can be turned over by following the instructions below By turning the unit 180 from the way it was received from the factory the sides become opposite but the front and back remain in the same relative position The bottom panel now becomes the top panel and vice versa Remove the access panel turn it 180 and re attach it to the unit so that all the information labels can be read Remove the spring loaded deflector blades turn them over replace and adjust so they are open and in a position to direct the heated air down to the floor 6 583 5 UNIT MOUNTING 5a A CAUTION Do not install units below 7 measured from the bottom of the unit to the floor in commercial applications unless unit is properly guarded to provide user protection from moving parts and 5 measured from the bottom of the unit to the floor in residential applications Be sure no obstructions block air intake and discharge of unit heaters The minimum distance from combustible material is based on the combustible material surface not exceeding 160 F Clearance from the top of the unit may be required to be greater than the minimum specified if heat damage other than fire may occur to materials above the unit heater at the temperature described Allow 18 clearance at rear or 6 beyond end of motor at rear of unit whichever is greater and access side to provide ample air for combustion and proper operation of fan
47. otor lead for the desired fan speed to the EAC or BLO terminal of the control board Unused motor leads for other speeds are placed on the PARK terminals of the board See the wiring diagram on page 20 When applying a blower equipped unit to a duct system or other load consult the performance curves on this page to determine the air temperature rise for a given motor speed range and static pressure Verify that the static pressure on the outlet of the unit does not exceed the maximum specified for the unit If static pressure is too high it must be reduced either by modifications to the system or using the medium or low motor speed If the unit shuts down on high limit during normal operation a higher motor speed should be used 6 583 5 Blower Curve Models HDB 60 125 Only Speeds Low Medium High HDB 60 70 635 65 684 T gt 60 741 4 v d 2 55 J 808 a m g r z 3 994 1 __ ___ 889 H E 45 pe 988 5 de 40 ere cc 1111 85 1270 0 00 0 10 0 20 0 30 0 40 0 50 0 60 0 70 External Static Pressure IN WC 70 794 65 EL qq Z 855 27 IR 7 60 1 926 a n o 4 o 55 pP de T 1010 t g m z 50 1111 s S Ls 45 1235 S E D 40
48. ottom of the unit at least 7 above the floor unless the unit is properly guarded In parking garages the unit must be installed in accordance with the standard for parking structures ANSI NFPA 88A latest edition and in repair garages the standard for repair garages NFPA 30A latest edition Formerly NFPA 88B In Canada installation of heaters in airplane hangars must be in accordance with the requirements of the enforcing authority and in public garages in accordance with the current CSA B149 codes In aircraft hangars keep the bottom of the unit at least 10 from the highest surface of the wings or engine enclosure of the highest aircraft housed in the hangars and in accor dance with the requirements of the enforcing authority and or NFPA 409 latest edition Installation of units in high humidity or salt water atmospheres will cause accelerated corrosion resulting in a reduction of the normal life of the units IMPORTANT To prevent premature heat exchanger failure do not locate ANY gas fired appliances in areas where corrosive vapors i e chlorinated halogenated or acid are present in the atmosphere Location Recommendations 1 When locating the heater consider general space and heating requirements availability of gas and electrical supply and proximity to vent locations 2 When locating units it is important to consider that the exhaust vent piping must be connected to the outside atmosphere 3 Be sure t
49. owner s risk Remove the screws that attach the burner tray to the header plate and remove the burner tray and manifold CAU T assembly from the heater Carefully clean the burners A with a wire brush or other suitable means Replace any damaged or deteriorating burners or orifices Service errepa or this equipment Musi Be bya install the back on a fe header making qualified service agency certain that all screws pipes and electrical connections are Do not attempt to reuse any mechanical or electrical tight controllers which have been wet Replace defective controller CAUTION Be careful when handling the igniter and flame sensor 1 Inspect the flame sensor and igniter for M PO deterioration and or cracks 2 Verify that the burners are touching each other To check most of the Possible Remedies in the troubleshooting at the carryover points This will ensure flame guide listed in Table 19 1 refer to the applicable sections of carryover from burner to burner the manual c Clean exterior of heat exchanger tubes _ d Fan blades General Maintenance 3 Check wiring for possible loose connections The unit and venting system must be checked once a year by a 4 Controls The gas valves and piping should be checked qualified service technician annually for general cleanliness and tightness The gas All installation and service of these unite must be controls should be checked to in
50. r firing a result of too high an input reduces the life of the appliance and increases maintenance Under no circum stances should the input exceed that shown on the serial plate Measuring the manifold pressure is done at the outlet pressure tap of the gas valve To Adjust the Manifold Pressure 1 Move the field installed manual shut off valve to the OFF position 2 Remove the 1 8 pipe plug from the outlet pressure tap on the gas valve and attach a water manometer of U tube type which is at least 12 high 3 Move the field installed manual gas shut off valve to the ON position 4 Create a high fire call for heat from the thermostat 5 Refer to Table 12 1 to determine the correct high fire manifold pressure for the gas type of the unit Adjust the main gas pressure regulator spring to achieve the proper manifold pressure for location see the combination gas control literature supplied with unit 6 After adjustment move the field installed manual shut off valve to the OFF position and replace the 1 8 pipe plug 7 After the plug is in place move the field installed manual shut off valve to the ON position and recheck pipe plugs for gas leaks with soap solution 14 6 583 5 CONTROL OPERATING SEQUENCE UNIT COMPONENTS CONTROL OPERATING SEQUENCE Upon a call for heat from the thermostat power is supplied to the power exhauster motor The unit will go through a purge period and then the direct
51. re detail see the control board data sheet included with the unit Unit starts but does 1 Main gas is off 1 Open manual gas valve not ignite 2 Air in gas line 2 Purge gas line 3 Main or manifold gas pressure 3 Set gas pressures per manual instructions 4 Check gas valve switch 4 Set gas valve switch to ON position Unit goes through cycle 1 Reversed main power polarity 1 Black wire HOT White wire NEUTRAL Green wire GROUND but the burners go out 2 Unit not grounded 2 Ground unit and verify quality of ground connection in less then 10 seconds 3 Flame not sensed 3 Check flame sense probe and connection Air circulating fan 1 Loose connections 1 Check all connections inoperable 2 Defective control board 2 Check control board data sheet and function 3 Defective fan motor 3 Check fan motor 6 583 5 17 UNIT WIRING Wiring Diagram Selection Since internal or factory wiring may vary depending on the controls manufacturer the wiring diagrams must be appropriately selected with the proper gas valve and ignition type The following wiring diagram represents a unit equipped with a single or two stage gas valve and direct spark ignition Figure 18 1 Unit Heater Wiring Diagram Single and Two Stage Direct Spark Ignition KE 2 I 3s e e z E z x x a no ke a uj z I e l TWO STAGE DIRECT SPARK IGNITION 100 SHUTOFF MULTIPLE RETRY W AUTO R
52. rvice Voltage Control Code No natural propane natural Btu Hr Output 48 000 60 000 100 000 Entering Airflow CFM 990 1 160 1 980 Outlet Velocity 653 769 747 Air Temp Rise F 45 48 47 Mounting Height Max ft 12 14 16 Heat Throw ft 36 38 56 Horsepower 1 8 Motor RPM Data Type Amps Unit Total Amps propane Performance Model HDB Models HDB60 HDB75 HDB100 HDB125 Btu Hr Output 80 000 100 000 Air Flow CFM Range 635 1100 795 1390 1060 1850 1240 2050 Static Pressure max 3 0 8 0 8 Air Temp Rise F 40 70 45 75 Motor Speeds 3 3 Horsepower 1 2 1 2 Max Max 1 100 1 100 Type P S C P S C Amps 9 5 9 5 Unit Total Amps 11 5 11 5 6 583 5 15 DIMENSIONAL DATA MODEL HD HDB Propeller Units Model HD Figure 16 1 Dimensional Drawings Model HD Blower Units Model HDB Figure 16 2 Dimensional Drawings Model HDB 14 9 BETWEEN 3 8 16 MOUNTING HOLES MOUNTING HOLES TYP MODEL SIZES 100 AND 125 ONLY 3 8 x 1 LONG G ADJUSTABLE T 3 5 LOUVERS E m E OPENING EL EL EL K EL R o J ACCESS VIEW 13 5 BETWEEN 3 8 16 MOUNTING HOLES MODEL SIZES 100 AND 125
53. s been altered defaced or removed BUYER AGREES THAT IN NO EVENT WILL SELLER BE LIABLE FOR COSTS OF PROCESSING LOST PROFITS INJURY TO GOODWILL OR ANY OTHER CONSEQUENTIAL OR INCIDENTAL DAMAGES OF ANY KIND RESULTING FROM THE ORDER OR USE OF ITS PRODUCT WHETHER ARISING FROM BREACH OF WARRANTY NONCONFORMITY TO ORDERED SPECIFICATIONS DELAY IN DELIVERY OR ANY LOSS SUSTAINED BY THE BUYER Component Applicable Models Heat Exchangers Gas Fired Units OCCURS FIRST BUYER S REMEDY FOR BREACH OF WARRANTY EXCLUSIVE OF ALL OTHER REMEDIES PROVIDED BY LAW IS LIMITED TO REPAIR OR REPLACEMENT AT THE FACTORY OF SELLER ANY COMPONENT WHICH SHALL WITHIN THE APPLICABLE WARRANTY PERIOD DEFINED HEREIN AND UPON PRIOR WRITTEN APPROVAL BE RETURNED TO SELLER WITH TRANSPORTATION CHARGES PREPAID AND WHICH THE EXAMINATION OF SELLER SHALL DISCLOSE TO HAVE BEEN DEFECTIVE EXCEPT THAT WHEN THE PRODUCT IS TO BE USED BY BUYER AS A COMPONENT PART OF EQUIPMENT MANUFACTURED BY BUYER BUYER S REMEDY FOR BREACH AS LIMITED HEREIN SHALL BE LIMITED TO ONE YEAR FROM DATE OF SHIPMENT FROM SELLER FOR GAS FIRED PRODUCTS INSTALLED IN HIGH HUMIDITY APPLICATIONS AND UTILIZING STAINLESS STEEL HEAT EXCHANGERS BUYER S REMEDY FOR BREACH AS LIMITED HEREIN SHALL BE LIMITED TO TEN YEARS FROM DATE OF SHIPMENT FROM SELLER These warranties are issued only to the original owner user and cannot be transferred or assigned No provision is made in these warranties for any labor a
54. s not recommended to install these unit heaters into residential confined spaces This recommendation is due to the concern that at some point in time the combustion air openings provided by the installer may become blocked or eliminated by the owner either intentionally or unintentionally Despite this recommendation if these units are installed into a residential confined space see National Fuel Gas Code ANSI Z223 1 NFPA 54 or CSA B149 1 Installation Code latest edition for detailed combustion air provisions The installation must adhere to these requirements Units installed in confined spaces in industrial commercial installations must be provided with two permanent openings one near the top and one near the bottom of the confined space Each opening should have a free area of not less than one square inch per 1 000 Btu Hr of the total input rating of all units in the confined space freely communicating with interior areas that have adequate infiltration from the outside For further details on supplying combustion air to a confined tightly sealed space or unconfined space see the National Fuel Gas Code ANSI Z223 1 NFPA 54 or CSA B149 1 Installation Code latest edition Turning The Unit 180 Model Sizes 30 75 Only All units are produced at the factory with left side controls when looking at the unit If the installation requires the controls to be on the right side all heaters with the exception of the HD HDB 100 a
55. spark igniter will be energized At the same time the main valve in the combination control valve will open to allow gas to flow to the burners If the fan motor has not all ready started it will start shortly If a flame is not sensed for any reason the main valve will close and there will be a short purge period before ignition is tried again If the flame is not sensed after four tries there will be at least a one hour wait before ignition is tried again Figure 15 1 Major Gas Electrical Service Safety and Other Components Power Exhauster 2 Pressure Switch 3 Integrated Direct Spark Control Board AO OLD Control Options Control Description Single Stage Direct Spark Ignition 100 Shut Off with Continuous Retry Utilizes a single stage combination gas control with ignition control Gas is lit with a direct spark igniter on call for heat Two Stage Direct Spark Ignition 100 Shut Off with Continuous Retry Utilizes a two stage combination gas control with built in ignition control Firing rate is 100 and 50 of full rated input Gas is lit with a direct spark igniter on call for heat Performance Model HD Btu Hr Input 60 000 75 000 125 000 Combination Gas Control Control Transformer Flame Sensor hidden Flame Rollout Switch 8 Auto Reset Limit Control hidden 9 Direct Spark Igniter hidden 10 Manual Reset Control hidden propeller 100 125 only Thermostat Voltage Se
56. sure that the unit is operating properly See control instruction sheets furnished performed by a qualified installation and service agency separately with the unit heater Before any service BE SURE TO TURN OFF GAS AT THE 5 Power exhaust assembly motor The power exhaust MANUAL SHUT OFF VALVE AHEAD OF THE COMBINATION motor bearings have been lubricated for long life and do GAS CONTROL AND TURN OFF ALL ELECTRIC POWER TO not require additional lubrication In dirty environments it THE HEATER may be desirable to clean the motors and blower housing and blow out the cooling air passages of the motor with compressed air 6 Perform periodic cleaning of inlet and vent terminal screens Table 17 1 Troubleshooting TROUBLE POSSIBLE CAUSE POSSIBLE REMEDY Unit does nothing 1 Power supply is off 1 Turn on main power 2 No 24V power to thermostat 2 a Check control transformer If failed transformer check thermostat wire gage and length 3 Thermostat malfunction 3a Verify wire connections to R amp W terminals only Check replace thermostat 4 LED flashes 4 Check LED flash code 5 Blown fuse on control board 5 Replace fuse 6 Defective control 6 Replace control LED light off or 1 Blown fuse on control board 1 Replace fuse flashing 2 Multiple causes 2 Control board LED flash codes vary with control type A decal is installed in the unit giving a brief description of the applicable codes for your heater For mo
57. ter Low profile heaters are designed for use in heating applica tions with ambient startup temperatures between 40 F and 90 F and ambient operating temperatures between 40 F and 90 F Do not install unit outdoors In garages or other sections of aircraft hangars such as offices and shops that communicate with areas used for servicing or storage keep the bottom of the unit at least 7 above the floor unless the unit is properly guarded to provide user protection from moving parts In parking garages the unit must be installed in accordance with the standard for parking structures ANSI NFPA 88A latest edition and in repair garages the standard for repair garages NFPA 30A latest edition Formerly NFPA 88B In Canada installation of heaters in airplane hangars must be in accordance with the requirements of the enforcing authority and in public garages in accordance with the current CSA B149 codes In aircraft hangars keep the bottom of the unit at least 10 from the highest surface of the wings or engine enclosure of the highest aircraft housed in the hangars and in accordance with the requirements of the enforcing authority and or NFPA 409 latest edition Installation of units in high humidity or salt water atmospheres will cause accelerated corrosion resulting in a reduction of the normal life of the units Do not install units below 7 measured from the bottom of the unit to the floor in commercial applic
58. the motor nameplate rating 17 Recheck the gas supply pressure at the field installed manual shut off valve The minimum inlet pressure should be 6 W C on natural gas and 11 W C on propane gas The maximum inlet pressure for either gas is 14 W C If inlet pressure exceeds 14 W C a gas pressure regulator must be added upstream of the combination gas valve 18 Open the field installed manual gas shut off valve 19 Place the manual main gas valve on the combination gas valve in the ON position Call for heat with the thermostat 20 Check to make sure that the main gas valve opens Check the manifold gas pressure See Main Burner Adjustment while the supply fan blower is operating 21 Check to insure that gas controls sequence properly See Control Operating Sequence If you are not familiar with the unit s controls i e combination gas control refer to the control manufacturer s literature supplied with the unit 22 Once proper operation of the unit has been verified remove any jumper wires that were required for testing 24 Replace the side control access panel Main Burner Adjustment The gas pressure regulator integral to the combination gas control is adjusted at the factory for average gas conditions It is important that gas be supplied to the unit heater in accordance with the input rating on the serial plate Actual input should be checked and necessary adjustments made after the unit heater is installed Ove
59. uspended securely from overhead structures at points not greater than 3 apart Fasten individual lengths of vent together with at least three corrosion resistant sheet metal screws Keep single wall vent pipe at least 6 from combustible materials For double wall vent pipe follow the vent pipe manufacturer s clearances to combustibles The minimum distance from combustible materials is based on the combustible material surface not exceeding 160 F Clearance from the vent pipe or the top of the unit may be required to be greater than 6 if heat damage other than fire could result such as material distortion or discoloration Avoid venting through unheated space when possible When venting does pass through an unheated space or if the unit is installed in an environment that promotes condensation insulate runs greater than 5 to minimize condensation Inspect for leakage prior to insulating and use insulation that is noncombustible with a rating of not less than 400 F Install a tee fitting at the low point of the vent system and provide a drip leg with a clean out cap as shown in Figure 8 1 When the vent passes through a combustible INTERIOR wall or floor a metal thimble 4 greater than the vent Figure 6 1 Venting Through Combustible Roof or Non Residential Single Wall N Wall Double Wall Vent Pipe Listed a Terminal Single Wall Vent Pipe Listed a Terminal Flashing N
60. y does not apply to any equipment which shall have been repaired or altered outside the factory of Seller in any way so as in the judgment of Seller to affect its stability nor which has been subjected to misuse negligence or operating conditions in excess of those for which such equipment was designed This warranty does not cover the effects of physical or chemical properties of water or steam or other liquids or gases used in the equipment BUYER AGREES THAT SELLER S WARRANTY OF ITS PRODUCTS TO BE FREE FROM DEFECT IN MATERIAL AND WORKMANSHIP AS LIMITED HEREIN SHALL BE IN LIEU OF AND EXCLUSIVE OF ALL OTHER WARRANTIES EITHER EXPRESS OR IMPLIED WHETHER ARISING FROM LAW COURSE OF DEALING USAGE OF TRADE OR OTHERWISE THERE ARE NO OTHER WARRANTIES INCLUDING WARRANTY OF MERCHANTABILITY OR FITNESS FOR PURPOSE WHICH EXTEND BEYOND THE PRODUCT DESCRIPTION CONFIRMED BY BUYER AND SELLER AS OF THE DATE OF FINAL AGREEMENT This warranty is void if the input to the product exceeds the rated input as indicated on the product serial plate by more than 5 6 on gas fired and oil fired units or if the product in the judgment of SELLER has been installed in a corrosive atmosphere or subjected to corrosive fluids or gases been subjected to misuse negligence accident excessive thermal shock excessive humidity physical damage impact abrasion unauthorized alterations or operation contrary to SELLER S printed instructions or if the serial number ha

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