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Mestek SEPARATED COMBUSTION GAS FIRED PROPELLER UNIT HEATER, Installation Instructions & Parts List

The Mestek Separated Combustion Gas Fired Propeller Unit Heater offers powerful heating performance and efficient airflow. For hassle-free installation and maintenance, we provide detailed Installation Instructions & Parts List manual that can be downloaded for free from our website. Get yours now at manualshive.com!

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17

Figure 10A - Horizontal Intake/Vent Locations

Figure 11 - Vertical Vent Installation                                                                              

Figure 11A - Horizontal Vent Installation                                                                     

Summary of Contents for SEPARATED COMBUSTION GAS FIRED PROPELLER UNIT HEATER

Page 1: ...ch as loose wires leaks or loose fasteners may occur It is the installer s responsibility to inspect and correct any problems that may be found Install operate and maintain unit in accordance with manufacturer s instructions to avoid exposure to fuel substances or substances from incomplete combustion which can cause death or serious illness The state of California has determined that these substa...

Page 2: ...on which if not avoided may result in minor injury or property damage NOTICE Used to notify of special instructions on installation operation or maintenance which are important to equipment but not related to personal injury hazards INSTALLATION VENTING Combustion Air Venting Piping 14 Exhaust Venting 14 15 16 17 OPERATION 18 19 20 Adjustments 18 20 MAINTENANCE Servicing Cleaning 21 IDENTIFICATION...

Page 3: ...e made in accordance with local codes or in absence of local codes with the latest edition of ANSI Standard Z223 1 N F P A No 54 National Fuel Gas Code All of the ANSI and NFPA Standards referred to in these installation instructions are those that were applicable at the time the design of this appliance was certified The ANSI Standards are available from the American National Standards Institute ...

Page 4: ...e Width 14 3 4 17 1 2 17 1 2 20 1 4 23 25 3 4 28 1 2 34 39 1 2 45 375 445 445 514 584 654 724 864 1003 1143 D Discharge Opening Width 15 3 8 18 1 8 18 1 8 20 7 8 23 5 8 26 3 8 29 1 8 34 5 8 40 1 8 45 5 8 391 460 460 530 600 670 740 879 1019 1159 E Width of Unit 17 7 8 20 5 8 20 5 8 23 3 8 26 1 8 28 7 8 31 5 8 37 1 8 42 5 8 48 1 8 454 524 524 594 664 733 803 943 1083 1222 F to Centerline of Flue 5 ...

Page 5: ... to the enforcing authorities PUBLIC GARAGES In repair garages unit heaters must be at least 8 feet 2 4m above the floor Refer to the latest edition of NFPA No 88B Repair Garages In parking structures unit heaters must be installed so that the burner flames are located a minimum of 18 inches 457mm above the floor or protected by a partition not less than 18 inches 457mm high However any unit heate...

Page 6: ...hes 635mm is required The distance between the flue collector and any combustible must be no less than 6 inches 152mm Also see COMBUSTION AIR and EXHAUST VENTING sections NOTICE Increasing the clearance distances may be necessary if there is a possibility of distortion or discoloration of adjacent materials Make certain that the lifting methods used to lift the heater and the method of suspension ...

Page 7: ...NE GAS Multiply the Cu Ft Hr value by 0 633 then use the table 4 Refer to the metric conversion factors listed in General Safety section for more SI unit measurements conversions To avoid equipment damage or possible personal injury do not connect gas piping to this unit until a supply line pressure leak test has been completed Connecting the unit before completing the pressure leak test may damag...

Page 8: ...ng should be sized in accordance with the latest edition of ANSI Standard Z223 1 National Fuel Gas Code in Canada according to CSA B149 See Tables 1 and 3 for correct gas supply piping size If gas pressure is excessive on natural gas applications install a pressure regulating valve in the line upstream from the main shutoff valve 3 Adequately support the piping to prevent strain on the gas manifol...

Page 9: ...andard units are shipped for use on 115 volt 60 hertz single phase electric power The motor nameplate and electrical rating on the transformer should be checked before energizing the unit heater electrical system All external wiring must conform to the latest edition of ANSI NFPA No 70 National Electrical Code and applicable local codes in Canada to the Canadian Electrical Code Part 1 CSA Standard...

Page 10: ...10 Figure 6 ...

Page 11: ...11 Figure 7 ...

Page 12: ...12 Figure 8 ...

Page 13: ...13 Figure 9 ...

Page 14: ...air system must be installed to prevent collection of condensate Pitch horizontal pipes downward 1 4 inch per foot 21mm m toward the inlet cap to facilitate drainage Vertical combustion air pipes should be piped as depicted in Figure 10 7 The equivalent length of the vent system must not be less than 5 feet and must not exceed 50 feet 15 2m Equivalent length equals the total length of straight pip...

Page 15: ...t be properly insulated NOTICE Increasing the clearance distances may be necessary if there is a possibility of distortion or discoloration of adjacent materials For a VERTICAL vent pipe section that passes through a floor or roof an opening 4 inches 102mm greater in diameter is required The opening must be insulated and flashed in accordance with applicable installation codes A HORIZONTAL section...

Page 16: ...e 10 Vertical Intake Vent Installation Size according to expected snow depth If excessive condensation develops a drip leg with a condensate drain may be required Insulating the pipes may eliminate the problem ...

Page 17: ...17 Figure 10A Horizontal Intake Vent Locations Figure 11 Vertical Vent Installation Figure 11A Horizontal Vent Installation ...

Page 18: ...perates the vent and ignition systems to control the temperature of the space being heated NOTICE The thermostat must be mounted on a vertical vibration free surface free from air currents and in accordance with the furnished instructions INITIAL LIGHTING 1 Open the manual gas valve in the gas supply line to the unit heater Loosen the union in the gas supply line to purge it of air Tighten the uni...

Page 19: ...R TO UNIT WIRING DIAGRAM 8A MAIN GAS VALVE HONEYWELL 8B MAIN GAS VALVE WHITE RODGERS 9 HONEYWELL IGNITOR 10 HONEYWELL PILOT BURNER 12 FAN TIME DELAY SWITCH 13 HI LIMIT LOCATED ON REAR HEADER PLATE OF HEAT EXCHANGER 19 1 2 1 3 5 4 6 SPARK 1 M V 2 MV PV 3 4 GND BURNER P V 5 6 7 8 9 24V GND 24V TH W OPT Honeywell WARNING S8600M CONTINUOUS RE TRY 100 SHUTOFF IP 90 SEC TRIAL FOR IGNITION 9 O N 8B O F F...

Page 20: ...2000 feet 610m or less SPECIAL ORIFICES ARE REQUIRED FOR INSTALLATIONS ABOVE 2 000 FT 610M When installed in Canada any references to deration at altitudes in excess of 2000 feet 610m are to be ignored At altitudes of 2000 to 4500 feet 610 to 1372m the unit heaters must be orificed to 90 of the normal altitude rating and be so marked in accordance with the ETL certification NOTICE There may be mom...

Page 21: ... power to the gas unit heater 3 To clean or replace the main burners remove the bottom panel and compress the spring by moving the burner toward the manifold Slide the opposite end of the burner downward from the locating slot while retaining spring is still compressed Pull the burners away from the heat 4 With the burners removed wire brush the inside surfaces of the heat exchanger 5 Remove any d...

Page 22: ...SURE SWITCH POWER VENT ASSY POWER VENT MOTOR FAN MOTOR GAS SUPPLY INLET AIR INLET FAN GUARD GAS VALVE RETAINER SPRING AIR SHUTTERS PILOT ASSY MANIFOLD Figure 15 Internal Furnace Assembly MAIN BURNERS Figure 14 Combustion Chamber IDENTIFICATION OF PARTS ...

Page 23: ...Refer to Installation 7 Refer to Installation 1 Open all manual gas valves 2 Replace fuse or turn on power supply 3 Turn up thermostat 4 Check limit switch with continuity tester If open replace limit switch 5 Check wiring per diagrams 6 Replace gas valve 23 SYMPTOMS POSSIBLE CAUSE S CORRECTIVE ACTION Table 7 Power Vented Propellers Troubleshooting Guide 1 Pressure regulator set too high 2 Defecti...

Page 24: ... Do not ream 6 Refer to Operation 7 Check thermocouple connection and replace if defective 8 Eliminate drafts Refer to Installation 9 Inspect and correct all wiring 10 Inspect and correct ignition system wiring See symptoms W X Y 11 Replace 24 Power Vented Propellers Troubleshooting Guide SYMPTOMS POSSIBLE CAUSE S CORRECTIVE ACTION 7 Defective thermostat 8 Defective transformer 9 Loose wiring 10 D...

Page 25: ...for short such as staples piercing thermostat wiring and correct Replace gas valve Refer to Operation 1 Be sure fan switch heater terminals are connected per diagrams 1 Refer to Operation 2 Check motor voltage with fan running Should be 115 volts AC 3 Refer to Operation 1 Close thermostat contacts 2 Check for 24V across 24V terminals of S8600 3 Set gap to 0 1 4 Replace pilot assembly 25 Power Vent...

Page 26: ...alve if not replace S8600 Igniter 1 Lengthen vertical run of flue pipe see venting 2 Burner orifice may be too large verify replace if req d 3 Increase air flow check fan size Check for proper voltage 4 Replace 1 Replace or tighten 2 Clean power venter wheel 3 Realign power venter wheel 4 Oil bearings on power venter motor Refer to label on motor 1 Check and tighten all wiring connec tions per dia...

Page 27: ...inch dia flue outlet Increaser required To be supplied by manufacturer 27 REF NO DESCRIPTION 1 Blower Housing Assembly 2 Speed Nut 3 Motor 4 Washer Plain 5 Plate Adapter 6 Blower Wheel 7 Mounting Bracket Pressure Switch 8 Mounting Bracket Junction Box 9 Screw S T 10 Screw Machine L 3 4 inch 11 Nut Keps Ext Lock Washer 12 Air Pressure Switch 13 Drill Screw REF NO DESCRIPTION 14 Junction Box Cover 1...

Page 28: ...ten instructions or has been altered or modified in any way by any unauthorized person b to any expenses including labor or material incurred during removal or reinstallation of the Product c to any damage due to corrosion by chemicals including halogenated hydrocarbons precipitated in the air d to any workmanship of the installer of the Product 3 This limited warranty is conditional upon a advisi...

Page 29: ...er Motor Sizes MS 0 None Not Applicable Digit 15 Accessories AS FACTORY INSTALLED A8 Input Derate P6 Summer Winter Switch M6 OSHA Fan Guard S1 409 Stainless Steel Burners S3 409 Stainless Steel Flue Collector G1 1 Stage T87K Mercury Free Thermostat w Subase Kit G5 2 Stage TH5220D Mercury Free Thermostat w Subbase These thermostats are factory ready for field installation include factory mounted re...

Page 30: ...30 NOTES ...

Page 31: ...31 NOTES ...

Page 32: ...pment unless you fully understand the controls GAS EQUIPMENT START UP GENERAL With power and gas off Make certain all packing has been removed Tighten all electrical terminals and connections Check damper linkages for tightness Check all fans blowers for free movement Check all controls for proper settings Check all set screws on blowers and bearings Check belt tightness BLOWER With power on and g...

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