Thermo Products omd-70 Iv. Installation A. Roof Jack, B. Standard Chimney, C.Furnace Location

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

IV. INSTALLATION

A. ROOF JACK

The roof jack assembly and accessories must be listed by a nationally recognized testing agency for the appropriate fuel.

The roof jack assembly must be installed according to the vent manufacturer’s instructions prior to the furnace installation. (Refer to Figure 2 for flue location on furnace.) Adapters for pitched roofs as well as extended barrel length roof jacks are available from Thermo Products.

All vent seams and connections must be sealed with high temperature silicone caulk and/or high temperature aluminum tape.

B. STANDARD CHIMNEY

When installed as a central furnace special type for single story dwelling, venting into a metal vent system approved by a nationally recognized testing agency for the appropriate fuel type is permitted. Lined masonry chimneys are acceptable when sized appropriately. The minimum chimney size should equivalent to the inside free area of the 4-inch diameter vent collar exiting the furnace, or 12.5 square inches.

Maximum chimney sizes and acceptable installation practices are referenced in the following publications. In lieu of local codes, when installing the OMD-70 with fuel oil, refer to the latest edition of the installation standard NFPA 31, Installation of Oil Burning Equipment. When installing the GMD-85 with natural or LP gases, refer to Appendix G of the latest edition of the installation standard NFPA 54, National Fuel Gas Code.

Notice: Blocked Vent Switch Installation for cottage type homes or non-mobile home type dwellings. The blocked vent switch kit must be installed to comply with CAN STD B140.4 where applicable. For installation instructions see AOPS2686 kit.

C.FURNACE LOCATION

1.For best performance, locate the furnace so that it is centralized with respect to the duct system.

2.This furnace is only intended for installation with free air return through the furnace door louvers. DO NOT connect a ducted return air system directly to the furnace. Improper installation may create a fire hazard and damage internal equipment, as well as void all manufacturer’s warranties.

3.This furnace may be installed on combustible flooring when utilizing either the No. 70 counterflow floor base, for below the floor duct systems, or with the cottage base, for floor level air distribution. See Figures 1 for depictions of the No. 70 and the cottage bases.

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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 TABLE OF CONTENTS SECTIONBEGINNING PAGE a. Combustible material b.Non-combustiblematerial MODELS OMD/GMDIII. FURNACE SPECIFICATIONS MODELGMD-85 BURNER DATA BLOWER DATAIV. INSTALLATION A. ROOF JACK B. STANDARD CHIMNEYC.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. TROUBLESHOOTINGNote: Check diagnostic code through view port OMD/GMD TROUBLESHOOTING FLOWCHARTprior 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 AREASD.FILTER LOCATION AND CLEANING INSTALLATION / SERVICEE. CONTACT INFORMATION APPENDIX A. REPLACEMENT PARTS LIST
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