Thermo Products CMA1-50N, CMA2-75N service manual B.Initial Start Up, Operating Instructions

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B.INITIAL START UP:

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

B.INITIAL START UP:

This furnace does not have a pilot. It is equipped with a hot surface igniter which automatically lights the burner. Do not attempt to light the burner by hand. Check the following items before the initial start-up.

1.Check all wiring for loose connections and proper hook up.

2.Leak test gas piping connections.

3.Check all tubing to the pressure switch and drains to make sure they are connected firmly at all their connection points.

4.Check flue pipe, combustion air inlet and all pvc connections for tightness and to make sure there is no blockage.

5.Make sure air filter is in place.

6.Make sure the outside vent and air intakes are installed according to instructions and that they are free from blockage.

7.Make sure that the drain trap is properly connected to the furnace and to the drain system.

OPERATING INSTRUCTIONS:

OPERATING INSTRUCTIONS:Manual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual background : Turn off power to furnace before it is placed into service. The gas piping system must have been leak tested by a qualified heating contractor in accordance with State, Local and National Codes including the National Fuel Gas Code NFPA 54/ANSI-Z233.1 (Latest Edition).

Manual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual background : It may be necessary to purge the air out of the gas line for initial start-up of the furnace after installation. This should be done by a qualified heating contractor. If excessive gas escapes when purging the gas supply at the union, allow the area to ventilate for at least 15 minutes before attempting to start the furnace. LP gas is especially dangerous because the specific gravity of LP gas allows it to accumulate at floor level at a dangerous concentration.

Manual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual background : Heat exchanger oil will burn off on initial firing creating an unpleasant odor. To prevent this odor from occurring more than once, it is suggested that:

1.A window(s) be opened.

2.The thermostat set at highest setting.

3.The furnace remain running as noted above for 15 minutes or until odor has dissipated.

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Contents FOR YOUR SAFETY INSTALLATION AND SERVICE MANUALGAS FIRED HIGH EFFICIENCY FURNACE DOWN FLOW & DIRECT VENT SEALED COMBUSTIONSECTION TABLE OF CONTENTSI. SAFETY INFORMATION Page Page The vent and air intake elbows must be kept away from bushes, shrubs or any vegetation that may restrict the flow of flue products. It must also be kept clear of any leaves, weeds or other combustible materials. Keep the vent hood clear of snow. Avoid locating the terminals in areas where standing water or condensate drippage may be a problem 1.A windows be opened DIMENSIONS II. FURNACE SPECIFICATIONS - CMA SERIESMODEL GAS SUPPLY PRESSUREINSTALLATION PARTS PACKAGE NON-COMBUSTIBLEMATERIAL COMBUSTIBLE MATERIAL.” COMBUSTIBLE MATERIALMODELS CMA IV. GENERAL INSTALLATION A.FURNACE LOCATIONTable Coil Cabinet Combustible Floor Base Model: 70-BASE Figure 1AFigure 1B Cottage Base Model: 01COT-BASE Figure 1C 1. Combustible Floor Base Model: 70 BASE B. BASE INSTALLATIONFigure Figure 2. Cottage Base Model: 01COT BASE C. ALCOVE INSTALLATIONFigure Figure D. CLOSET INSTALLATIONE. FUEL PIPING F.GENERAL VENTING REQUIREMENTS Table MAXIMUM VENT LENGTHFigure 6. CMA*-75SHOWN 1. Vent And Combustion Air Pipes H. Direct Venting Through a Sidewall2. Exhaust Vent Termination Elbow Sidewall Venting Page 4. Vent Terminal Location Guidelines Terminations Figure Figure 5.Secure plate to roofFigure K.CONDENSATE DRAIN LINE AND TRAP ASSEMBLY 2.Connection Of Power Supply Wires Figure L.ELECTRICAL WIRING3.Connection Of Room Thermostat Wires 1. Electrical Branch Supply CircuitElectrical Wire Diameter AWG 24 22 20 18 4. BLOWER MOTOR SPEED WIRING Figure Speed Tap \ CMA1-50Static PressureSpeed Tap \ CMA2-75Static Pressure5. FIELD WIRING AND REPLACING WIRING V.STARTING THE UNIT A. SEQUENCE OF OPERATIONS MAIN BURNER OPERATION CALL FOR HEAT SATISFIED OPERATING INSTRUCTIONS B.INITIAL START UPC.ADJUSTMENT OF BTU INPUT RATE D.BURNER ADJUSTMENT GAS PRESSURE CHART FOR CMA* MODEL FURNACESFigure E.SETTING TEMPERATURE RISEF.FURNACE CHECKOUT PROCEDURE VII. DEALER MAINTENANCE VI. INSTALLERS INSTRUCTIONS TO USER4. INDUCER BLOWER ASSEMBLY 2.CONDENSATE LINE/TRAP ASSEMBLYA.ELECTRICAL B.GENERAL INSPECTION5. GASKETS/SEALING MATERIALS 1.CLEANING THE COIL AIR SIDEC.HEAT EXCHANGER D.HOUSE AIR BLOWERFILTER REPLACEMENT FILTER MAINTENANCE PROCEDUREVIII. TROUBLESHOOTING DIAGNOSTIC FEATURESThe LED will also flash once at power-up TROUBLESHOOTING GUIDE AT THE INTEGRATED CONTROL? Yes AFTER GAS VALVE OPENS, DO THE BURNERS IGNITE? DOES SYSTEM RUN UNTIL THERMOSTAT IS SATISFIED? IF LED LIGHT FLASHES APPENDIX – A REPLACEMENT PARTS Page APPENDIX – B WIRING DIAGRAM