Thermo Products omd-70 service manual Do not attempt to start the burner when

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: Do not attempt to start the burner when:

All installations and services must be performed by qualified service personnel.

: If you suspect there is a problem with the furnace, the venting system or any other related problem, immediately contact a qualified service agency. If a service agency is not available contact your fuel supplier.

: Personal injury, or property damage, could result from major repair or service of this furnace by anyone other than a qualified contractor. Only the routine maintenance described in the user section of this manual should be performed by the user.

: The area around the furnace should be kept free and clear of combustible materials, especially papers and rags.

: Never burn garbage or refuse in your furnace. Never try to ignite oil or gas by tossing burning papers or other material into your furnace.

: Do not attempt to start the burner when:

1.Excess oil or gas has accumulated.

2.The furnace is full of vapors.

4.The combustion chamber is very hot.

If one or more of these conditions exist, contact a qualified service person.

: Do not block or obstruct air openings on the furnace or air openings communicating with the area in which the furnace is installed.

: Do not allow the outside air intake to be blocked or obstructed by vegetation, ice, snow or any other materials.

: Do not use this furnace if any part has been underwater. Immediately call a qualified service agency to inspect the furnace and to replace any part of the electrical or control system which has been underwater.

: Should overheating occur or the fuel supply fail to shut off, shut off the manual fuel supply valve to the furnace before shutting off the electrical supply.

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Contents MODEL: OMD-70 INSTALLATION AND SERVICE MANUAL FOR YOUR SAFETYGAS-FIREDOR OIL-FIREDFURNACE DOWN FLOW & DIRECT VENT SEALED COMBUSTIONI. SAFETY SECTION If you do not follow these instructions exactly, a fire or explosion may result causing personal injury, loss of life or property damage Do not attempt to start the burner when All installations and services must be performed by qualified service personnel POWER SWITCH SECTION TABLE OF CONTENTSBEGINNING PAGE a. Combustible material b.Non-combustiblematerial MODELS OMD/GMDMODEL III. FURNACE SPECIFICATIONSGMD-85 BURNER DATA BLOWER DATAB. STANDARD CHIMNEY IV. INSTALLATION A. ROOF JACKC.FURNACE LOCATION D. BASE INSTALLATION Combustible Floor Base Model: 70-BASECottage Base Model: 01COT-BASE Figure 1A1. Combustible Floor Base Model: 70-BASE 2. Cottage Base Model: OMCCOT-BASE IMPORTANT: Adequate combustion air must be provided under all circumstances. If the underside of the home is skirted or enclosed e.g. by an enclosed crawlspace, the combustion air intake should exit through the side of cottage base and terminate outside of the structure. All joints and seams of supply ducts and combustion air ducts must be closed with a sealing method suitable to the application conditions and temperatures e.g. using high temperature silicone caulk and/or aluminum tape E. ALCOVE INSTALLATION F. CLOSET INSTALLATIONG. COMBUSTION AIR The preferred location of the outside combustion air intake termination e.g. an optional stainless steel intake hood, part no.370183 is through the side of the structure, skirting or enclosure. An alternate termination location is under the structure in the skirted or crawlspace area providing a minimum of 50 square inches of free area exists around the perimeter for outside combustion air to be drawn through. NOTE: Combustion air cannot be drawn from the occupied space of the home Figure H. FUEL PIPING 2. Oil Tank and Piping OMD-70 All installations and services must be performed by qualified service personnel Figure J. ELECTRICAL WIRING 1.Electrical Branch Supply Circuit 4. BLOWER CONTROLLER INFORMATION FOR PSC MOTOR TERMINAL DEFINITIONS & FIELD WIRINGA. Inputs B. OutputsC. Operating Modes PSC TROUBLE SHOOTING DIAGNOSTIC FEATURES5. WIRING DIAGRAM K. BURNER INSTALLATION L.BURNER OPERATION AND ADJUSTMENT replacement parts for location identification. After the furnace is warmed up to a steady- state condition about 15 minutes, the final burner adjustment should be made using combustion instrumentation for measuring carbon dioxide CO2 or oxygen O2, carbon monoxide CO, smoke for oil furnaces, and stack temperature. In order to achieve the most efficient combustion possible, the following steps must be taken M. FLUE GAS COMBUSTION ANALYSIS BURNER COMBUSTION PARAMETERSV. DEALER MAINTENANCE A. TROUBLESHOOTINGOMD/GMD TROUBLESHOOTING FLOWCHART Note: Check diagnostic code through view portprior to removing doors Are the thermostat wires closed? If 120 VAC is After fuel valve opens, does the burner ignite? Has the high limit thermostat B.CAD CELL CHECKOUT PROCEDURE: OMD ONLY C.HEAT EXCHANGER CLEANING INSTRUCTIONSD. CLEANING OR REPLACING FLUE PIPES E. EXTENDED SHUTDOWN VI. USER INFORMATION SECTION A. WARNINGS AND CAUTIONSB. COMPONENT LOCATIONS Figure C. INSPECTION AREASINSTALLATION / SERVICE D.FILTER LOCATION AND CLEANINGE. CONTACT INFORMATION APPENDIX A. REPLACEMENT PARTS LIST