Thermo Products CMA1-50N, CMA2-75N service manual Secure plate to roof, Figure Figure

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5.Secure plate to roof.

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

3.Place second flashing plate on roof over existing hole.

4.Plate must be sealed to roof to ensure a weather proof seal.

5.Secure plate to roof.

6.Drop pvc pipes thru holes in flashing plates.

7.Secure with hose clamps to flashing plate.

8.Seal with silicone type caulk.

The furnace may be vented vertically through the roof. The outlet/inlet of the vent and air intake terminations shall be a minimum of 12 inches above highest anticipated snow level. The vent outlet must be installed a minimum of 12 in. above the air intake inlet. The combustion air intake shall be installed upwind of the vent outlet when exposed to prevailing winds. The exhaust vent and combustion air intake can be a minimum of 3 in. and a max. of 24 in. apart (see Figures 11 & 12). When installing dual 2” PVC pipes and the 2” flashing plates (AOPS7484) on pitched roof, slope adapter may be used to simplify installation.

Figure 11.

Figure 12.

25

Image 27

Contents DOWN FLOW & DIRECT VENT SEALED COMBUSTION INSTALLATION AND SERVICE MANUALFOR YOUR SAFETY GAS FIRED HIGH EFFICIENCY FURNACESECTION 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 GAS SUPPLY PRESSURE II. FURNACE SPECIFICATIONS - CMA SERIESDIMENSIONS MODELINSTALLATION PARTS PACKAGE NON-COMBUSTIBLEMATERIAL COMBUSTIBLE MATERIAL.” COMBUSTIBLE MATERIALIV. GENERAL INSTALLATION A.FURNACE LOCATION MODELS CMATable Combustible Floor Base Model: 70-BASE Figure 1A Coil CabinetFigure 1B Cottage Base Model: 01COT-BASE Figure 1C B. BASE INSTALLATION 1. Combustible Floor Base Model: 70 BASEFigure Figure C. ALCOVE INSTALLATION 2. Cottage Base Model: 01COT BASEFigure 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 1. Electrical Branch Supply Circuit Figure L.ELECTRICAL WIRING2.Connection Of Power Supply Wires 3.Connection Of Room Thermostat WiresElectrical Wire Diameter AWG 24 22 20 18 4. BLOWER MOTOR SPEED WIRING Figure Pressure CMA1-50Speed Tap \ StaticPressure CMA2-75Speed Tap \ Static5. 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 USERB.GENERAL INSPECTION 2.CONDENSATE LINE/TRAP ASSEMBLY4. INDUCER BLOWER ASSEMBLY A.ELECTRICALD.HOUSE AIR BLOWER 1.CLEANING THE COIL AIR SIDE5. GASKETS/SEALING MATERIALS C.HEAT EXCHANGERDIAGNOSTIC FEATURES FILTER MAINTENANCE PROCEDUREFILTER REPLACEMENT VIII. TROUBLESHOOTINGThe 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