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P/N: MG-1008 (Printed Instruction Manual)
Note: This page is not to be included as part of printed hard copy.

Overall Specifications:

Material: white plain paper
Printed text: black
Binder: staple upper left corner

Individual page specifications:

Cover page: printed single-side up
Table of contents page: printed single-side up
Warranty page: printed single-side down (facing out as last page of manual)

The balance of instruction manual pages to be printed utilizing both front and back side of paper.

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Содержание MDA1-100N

Страница 1: ...lain paper Printed text black Binder staple upper left corner Individual page specifications Cover page printed single side up Table of contents page printed single side up Warranty page printed singl...

Страница 2: ...O NOT USE ANY PHONE IN YOUR BUILDING LEAVE THE BUILDING IMMEDIATELY IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A NEIGHBOR S PHONE FOLLOW THE GAS SUPPLIER S INSTRUCTIONS IF YOU CANNOT REACH YOUR GAS SUPPL...

Страница 3: ...t Flue Vent Connector 16 K Sidewall Venting 19 1 Horizontal Size and Lengths for Horizontal Vents 20 L Gas Gas Piping 21 1 Installation of Natural Gas Piping 23 2 Installation of Propane Gas Piping 24...

Страница 4: ...INSTALLER S INSTRUCTIONS TO USER 41 APPENDIX A SOURCES FOR REFERENCED STANDARDS 42 APPENDIX B SEQUENCE OF OPERATION 43 APPENDIX C TROUBLESHOOTING FLOWCHART 45 APPENDIX D PARTS PACKAGE COMPONENTS 49 A...

Страница 5: ...propane gas in this manual any other label or markings on the furnace is to be construed to be propane HD 5 a commercial grade of liquefied petroleum gases composed of a minimum of 90 percent liquid...

Страница 6: ...ation dates for replacement of any warranted part s I Safety The following guidelines and warnings should be read and understood before continuing with the installation of this furnace Failure to foll...

Страница 7: ...relocation associated with horizontal installation of the MDA1 10 Inform and demonstrate to the user the correct operation and maintenance of the appliance as explained in the Users Information Manual...

Страница 8: ...ing a concrete base bricks patio blocks etc When installing this furnace provisions must be made to insure the supply of adequate combustion and ventilation air in accordance with the air for combusti...

Страница 9: ...urn whether flameproof or not or whether plastered or not plastered Non combustible Material Material which will not ignite and burn such materials consisting entirely of steel iron brick concrete sla...

Страница 10: ...salt Tile adhesives Avoid installing the furnace in areas where it is evident these chemicals are being stored or used within close proximity to the furnace In addition avoid storing or using any che...

Страница 11: ...ished with properly screened metal sleeves If an exhaust fan or additional fuel burning appliances are present in the furnace room there should be increased concern about providing adequate airflow to...

Страница 12: ...ides and service access to the front of the furnace refer to Table 1 If the furnace is suspended it must be supported at both ends and in the middle with clearance allowed for removal of both access d...

Страница 13: ...oil must be installed on the air outlet side of the furnace to avoid water vapor condensation in the furnace heat exchanger NOTICE Return air grilles and supply registers in the air distribution syste...

Страница 14: ...hermo Pride Filter Rack I Use of Non Thermo Pride Filter Retention Means Failure to comply with minimum filter installation requirements may affect the performance and or void the warranty on this fur...

Страница 15: ...y The following formula can be used to determine the minimum filter area required for cooling if the unit is equipped with cooling This value should then be compared to the value shown in table 2 and...

Страница 16: ...zontal series furnace must be vented in accordance with these instructions into a factory built chimney or vent complying with a recognized standard Type B1 or double wall vent as well as masonry chim...

Страница 17: ...sealed The inside of the vent should be free of all obstructions 2 Replacing An Existing Furnace From a Common Vent CARBON MONOXIDE POISONING HAZARD Failure to follow the steps outlined below for each...

Страница 18: ...tion Use the flame of a match or use a draft gauge 8 If the improper venting is observed on any of the appliances during the above testing the common vent system must be corrected Follow the steps out...

Страница 19: ...it rises and the bottom will be heated first This heating of the walls will cause the flue gas temperature to drop which in turn may reduce the wall temperature below the dew point causing condensati...

Страница 20: ...of two or more appliances These requirements as well as all the installation requirements outlined in this manual for an MHA1 MDA1 series furnace must be followed when an MHA1 MDA1 furnace is common...

Страница 21: ...6 temperature rating 480 F minimum should be used to secure both the flue pipe MHA1 MDA1 50 and the Thermo Products supplied 4 in adapter MHA1 MDA1 75 MHA1 MDA1 100 MHA1 MDA1 125 to the outlet of the...

Страница 22: ...ould be left in place for proper furnace operation The flue may exit the unit through the top left side or right side of the unit refer to Figure 5 The inducer can be rotated by removing the four 4 in...

Страница 23: ...vent K Sidewall Venting The MHA1 MDA1 Series furnaces SHALL NOT BE COMMON VENTED IF SIDEWALL VENTING IS EMPLOYED Before sidewall venting the MHA1 MDA1 furnace read and understand this section as well...

Страница 24: ...consequential damages The above limitations or exclusions may not apply to you IMPORTANT It is the installer s responsibility to inform and demonstrate to the user the correct operation and maintenan...

Страница 25: ...ng and should include the furnace piping and gas valve Never use an open flame to check for a gas leak Care must be taken not to wet electronic components during leak test Wetting the electronic compo...

Страница 26: ...resistant to LP gas Pipe dope or sealant certified to be resistant to the action of liquefied petroleum gases shall be used on all threaded joints Left and Right Gas Supply Piping This furnace is set...

Страница 27: ...ll gas appliances installed on any main or trunk line must be totaled to determine its required carrying capacity EXAMPLE A line must supply a furnace of 100 000 BTU hr input a hot water heater of 40...

Страница 28: ...ure for natural gas is 14 0 in W C and minimum supply for purpose of input adjustment is 4 5 in W C 2 INSTALLATION OF PROPANE GAS PIPING Copper and brass tubing and fittings except tin lined shall not...

Страница 29: ...stem Table 5 COPPER TUBING SIZE FOR PROPANE GASES All black pipe sizes shown are nominal iron pipe sizes Seamless copper tubing may only be used with gases that are not corrosive to it See note below...

Страница 30: ...f bushing is provided for support of the supply wire harness Make the 115 volt supply connection in this junction box A green screw is provided in order to connect the power supply ground wire A disco...

Страница 31: ...currents from supply or return air registers or such that natural circulation of air is blocked such as behind doors in shelves or in corners It should always be located on an interior wall In additi...

Страница 32: ...airflow The wires for the unused speeds should then be reconnected to the module in the park positions Figure 8 Blower and Control Panel The option switches on the W R integrated control are used to...

Страница 33: ...ments section of this manual regarding the installation and leak testing of gas piping For initial start up of the appliance after installation it may be necessary to purge the air out of the gas line...

Страница 34: ...Do not attempt to light the burner by hand BEFORE OPERATING smell all around the appliance area for gas Be sure to smell next to the ground because some gas is heavier than air and will settle on the...

Страница 35: ...nd If you smell gas STOP Follow section h in the safety information above If you don t smell gas go to the next step Rotate the gas control valve knob or switch lever to the ON position Replace the bu...

Страница 36: ...elevation of 5 000 feet If the furnace is installed at an elevation of 2 000 feet or less no reduction in input rate is required For high altitude installations your local gas supplier may assist in d...

Страница 37: ...gauge or manometer at the 1 8 in NPT plugged tap on the inlet side of the appliance gas control valve shown in the General Gas Piping Requirements section of this manual An Allen wrench is normally r...

Страница 38: ...nt h When the input rate adjustment has been completed shut off the fuel gas to the appliance Remove the pressure gage Reinstall the manifold pipe plug using a thread compound resistant to the action...

Страница 39: ...ed may vary depending on a number of factors A few of these factors are changes in the actual resistance of the duct system to airflow at any time de rating of the appliance due to elevation fouling o...

Страница 40: ...g power b Block return air opening or disconnect blower motor leads c Restore power to appliance d In the heating mode set the thermostat above room temperature producing a call for heat e When high a...

Страница 41: ...rning off power or removing the necessary to restart the furnace and have the failure occur again DIAGNOSTIC FEATURES The 50A65 control used on this furnace continuously monitors its operation and the...

Страница 42: ...procedures which must be performed by the homeowner user can be found in the Users Information Manual The following maintenance procedures should be performed at the beginning of each heating season...

Страница 43: ...et must be replaced if they show any sign of having been damaged 5 Clean all furnace markings as necessary and verify that all are still legible Any illegible or missing markings must be replaced Repl...

Страница 44: ...A1 series units Slide dirty filter out of the filter rack Clean the filter by vacuuming rinsing with tap water hosing or dipping in an ordinary detergent solution After cleaning replace the completely...

Страница 45: ...users information manual 5 That failure to maintain and operate this furnace in accordance with these instructions could result in hazardous conditions bodily injury and property damage and may void...

Страница 46: ...nd 21279 0230 301 617 7819 3 American National Standards Institute Inc Attn Customer Service 11 West 42 nd Street New York New York 10036 212 642 4900 4 American Society for Testing and Materials 100...

Страница 47: ...t or roll out switch opens system energizes inducer fan and circulator blower at high speed until situation correction occurs Thermostat calls for heat contacts close Pressure switch senses adequate p...

Страница 48: ...ition control module goes into system lockout If flame is detected then lost the ignition control module will repeat the initial ignition sequence for a total of four recycles After four unsuccessful...

Страница 49: ...to the thermostat Yes No Replace thermostat Yes Are the thermostat wires connected properly Replace control transformer Correct wire connections No Is there 24 VAC across TH TR terminals of the igniti...

Страница 50: ...continuously replace ignition control module No Check wiring to draft inducer If okay replace inducer assembly Is there 120 VAC across draft inducer power terminals IND IND N at the ignition control m...

Страница 51: ...me on when energized Does blower wheel spin freely Yes Is blower motor capacitor working properly Yes Replace Motor No No Replace blower motor capacitor No Check for blower wheel rubbing against housi...

Страница 52: ...n diagram Reset if necessary No Check for short in wire to thermostat Replace thermostat if necessary No Yes No Yes Does system run until thermostat is satisfied If LED Light Flashes 1 Flash then paus...

Страница 53: ...X4 J BOX 350024 1 2X4 J BOX COVER 350020 1 GROUNDING INSTRUCTIONS MG 966 1 HEYCO SR 34 2 350016 1 HEYCO UB 875 350750 1 INSTALLATION PARTS PACKAGE MHA1 MDA1 75 S00S4427 MDA1 MHA1 100 S00S4428 MDA1 MHA...

Страница 54: ...All installations and services must be performed by qualified service personnel 50 APPENDIX E REPLACEMENT PARTS LIST MHA1 120v 24v 3 4 2 1 O N...

Страница 55: ...All installations and services must be performed by qualified service personnel 51...

Страница 56: ...All installations and services must be performed by qualified service personnel 52 REPLACEMENT PARTS LIST MDA1...

Страница 57: ...All installations and services must be performed by qualified service personnel 53...

Страница 58: ...All installations and services must be performed by qualified service personnel 54 APPENDIX F WIRING DIAGRAM...

Страница 59: ...All installations and services must be performed by qualified service personnel 55...

Страница 60: ...nent split capacitor air over 48 Y Blower motor nominal HP 1 5 1 3 1 2 3 4 Blower motor full load amps 3 25 6 0 8 0 11 0 Motor shaft diameter Direction of rotation shaft end Clockwise No of speeds 3 4...

Страница 61: ...ir over 48 Y Blower motor nominal HP 1 5 1 3 1 2 3 4 Blower motor full load amps 3 25 6 0 8 0 11 0 Motor shaft diameter Direction of rotation shaft end Clockwise No of speeds 3 4 4 4 Run capacitor 10...

Страница 62: ......

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