Thermo Products CMA2-75N, CMA1-50N service manual Table Of Contents, Section

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			TABLE OF CONTENTS
SECTION			BEGINNING PAGE
I.	SAFETY INFORMATION			1
II.	FURNACE SPECIFICATIONS			6
III. GENERAL INSTRUCTIONS AND CLEARANCES				7
IV. GENERAL INSTALLATION				9
	A. FURNACE LOCATION			9
	B. BASE INSTALLATION			12
	C. ALCOVE INSTALLATION			13
	D. CLOSET INSTALLATION			14
	E. FUEL PIPING			15
	F. GENERAL VENTING REQUIREMENTS			16
	G. CONNECTING THE EXHAUST VENT, AND COMBUSTION			18
	AIR INTAKE
	H. DIRECT VENTING THROUGH A SIDEWALL			19
	I. INSTALLATION OF OUTSIDE EXHAUST/INTAKE TERMINATIONS			23
	J. CONNECTING THE FURNACE TO ROOF VENT/ INTAKE TERMINATIONS			24
	K. CONDENSATE DRAIN LINE AND TRAP ASSEMBLY			26
	L. ELECTRICAL WIRING			27
V.	STARTING THE UNIT			32
	A. SEQUENCE OF OPERATION			32
	B. INITIAL START-UP			34
	C. ADJUSTMENT OF BTU INPUT RATE			35
	D. BURNER ADJUSTMENT			36
	E. SETTING TEMPERATURE RISE			37
	F. FURNACE CHECK-OUT PROCEDURE			38
VI. INSTALLER'S INSTRUCTIONS TO USER				39
VII. DEALER MAINTENANCE				39
	A. ELECTRICAL			40
	B. GENERAL INSPECTION			40
	C. HEAT EXCHANGER			41
	D. HOUSE AIR BLOWER			41
	E. RETURN AIR FILTER			41
VIII. TROUBLE SHOOTING				42
APPENDIX-A		REPLACEMENT PARTS		49
APPENDIX-B		WIRING DIAGRAM		51
WARRANTY				52
REFERENCED PUBLICATIONS:			FOR COPIES CONTACT:
NATIONAL FUEL GAS CODE			NATIONAL FIRE PROTECTION ASSOCIATION
NFPA 54/ANSI-Z233.1			1 BATTERYMARCH PARK
(LATEST EDITION)			P.O. BOX 9101
			QUINCY, MA 02269-9101

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Contents GAS FIRED HIGH EFFICIENCY FURNACE INSTALLATION AND SERVICE MANUALFOR YOUR SAFETY DOWN FLOW & DIRECT VENT SEALED COMBUSTIONTABLE OF CONTENTS SECTIONI. 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 MODEL II. FURNACE SPECIFICATIONS - CMA SERIESDIMENSIONS GAS SUPPLY PRESSUREINSTALLATION PARTS PACKAGE COMBUSTIBLE MATERIAL.” COMBUSTIBLE MATERIAL NON-COMBUSTIBLEMATERIALTable IV. GENERAL INSTALLATION A.FURNACE LOCATIONMODELS CMA Figure 1B Combustible Floor Base Model: 70-BASE Figure 1ACoil Cabinet Cottage Base Model: 01COT-BASE Figure 1C Figure Figure B. BASE INSTALLATION1. Combustible Floor Base Model: 70 BASE Figure C. ALCOVE INSTALLATION2. Cottage Base Model: 01COT BASE D. CLOSET INSTALLATION FigureE. FUEL PIPING F.GENERAL VENTING REQUIREMENTS MAXIMUM VENT LENGTH TableFigure 6. CMA*-75SHOWN H. Direct Venting Through a Sidewall 1. Vent And Combustion Air Pipes2. Exhaust Vent Termination Elbow Sidewall Venting Page 4. Vent Terminal Location Guidelines Terminations 5.Secure plate to roof Figure FigureFigure K.CONDENSATE DRAIN LINE AND TRAP ASSEMBLY 3.Connection Of Room Thermostat Wires Figure L.ELECTRICAL WIRING2.Connection Of Power Supply Wires 1. Electrical Branch Supply CircuitElectrical Wire Diameter AWG 24 22 20 18 4. BLOWER MOTOR SPEED WIRING Figure Static CMA1-50Speed Tap \ PressureStatic CMA2-75Speed Tap \ Pressure5. FIELD WIRING AND REPLACING WIRING V.STARTING THE UNIT A. SEQUENCE OF OPERATIONS MAIN BURNER OPERATION CALL FOR HEAT SATISFIED B.INITIAL START UP OPERATING INSTRUCTIONSC.ADJUSTMENT OF BTU INPUT RATE GAS PRESSURE CHART FOR CMA* MODEL FURNACES D.BURNER ADJUSTMENTE.SETTING TEMPERATURE RISE FigureF.FURNACE CHECKOUT PROCEDURE VI. INSTALLERS INSTRUCTIONS TO USER VII. DEALER MAINTENANCEA.ELECTRICAL 2.CONDENSATE LINE/TRAP ASSEMBLY4. INDUCER BLOWER ASSEMBLY B.GENERAL INSPECTIONC.HEAT EXCHANGER 1.CLEANING THE COIL AIR SIDE5. GASKETS/SEALING MATERIALS D.HOUSE AIR BLOWERVIII. TROUBLESHOOTING FILTER MAINTENANCE PROCEDUREFILTER REPLACEMENT 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