Thermo Products omd-70 service manual

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

If possible, install the tubing under the floor. Specific information on piping, fuel pump connections, lift capabilities and tank installations is provided in the fuel pump manufacturer’s instructions.

If the oil tank is located inside the building and the tank capacity is between 10 and 660 gallons, it shall not be located within 5 feet horizontally from any source of heat, or oil- burning appliance. Furthermore, the oil tank shall not block access to utility service meters, switch panels, and shutoff valves.

If an underground tank used, the top of the tank should be below all piping in order to prevent oil discharge through a broken connection. Underwriters Laboratories requirements now stipulate that all 275 gallon and larger tanks have a bottom outlet. This is to prevent the accumulation of condensate, which causes the tank to rust. It is also recommended to use a water trap or additives to prevent condensate accumulation.

If the tank is above the burner, and gravity oil feed to the burner is permitted, a single line system may be used. The line should have a gradual slope downward of approximately 1/2 inch per foot, or more, to a point directly below where it is connected to the pump. Installing the line with a downward slope will help prevent the formation of air pockets in the line.

IMPORTANT: An oil safety valve or a delayed-action solenoid valve is required with all gravity feed oil supply systems.

IMPORTANT: The oil storage tank must be free of water, sludge and scale to prevent excessive wear and possible damage to furnace oil pump and burner nozzle. A fuel oil filter installed in the oil supply line to the burner is required.

OIL FILTER: For all installations, use a low micron, oil filter with the capacity to trap particles 10 microns in diameter, or greater. Filtering the oil supply helps to prevent nozzle clogging. Install the oil filter inside the building between the tank shutoff valve and the burner. The filter cartridge should be replaced at least once a year. The filter body should be thoroughly cleaned before installing a new cartridge.

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Contents DOWN FLOW & DIRECT VENT SEALED COMBUSTION MODEL: OMD-70 INSTALLATION AND SERVICE MANUALFOR YOUR SAFETY GAS-FIREDOR OIL-FIREDFURNACEI. 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 BEGINNING PAGE TABLE OF CONTENTSSECTION a. Combustible material MODELS OMD/GMD b.Non-combustiblematerialGMD-85 III. FURNACE SPECIFICATIONSMODEL BLOWER DATA BURNER DATAC.FURNACE LOCATION IV. INSTALLATION A. ROOF JACKB. STANDARD CHIMNEY Figure 1A D. BASE INSTALLATIONCombustible Floor Base Model: 70-BASE Cottage Base Model: 01COT-BASE1. 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 F. CLOSET INSTALLATION E. ALCOVE 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 TERMINAL DEFINITIONS & FIELD WIRING 4. BLOWER CONTROLLER INFORMATION FOR PSC MOTORB. Outputs A. InputsC. Operating Modes DIAGNOSTIC FEATURES PSC TROUBLE SHOOTING5. 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 BURNER COMBUSTION PARAMETERS M. FLUE GAS COMBUSTION ANALYSISA. TROUBLESHOOTING V. DEALER MAINTENANCEprior to removing doors Note: Check diagnostic code through view portOMD/GMD TROUBLESHOOTING FLOWCHART Are the thermostat wires closed? If 120 VAC is After fuel valve opens, does the burner ignite? Has the high limit thermostat C.HEAT EXCHANGER CLEANING INSTRUCTIONS B.CAD CELL CHECKOUT PROCEDURE: OMD ONLYD. CLEANING OR REPLACING FLUE PIPES E. EXTENDED SHUTDOWN A. WARNINGS AND CAUTIONS VI. USER INFORMATION SECTIONFigure C. INSPECTION AREAS B. COMPONENT LOCATIONSE. CONTACT INFORMATION D.FILTER LOCATION AND CLEANINGINSTALLATION / SERVICE APPENDIX A. REPLACEMENT PARTS LIST