Miller CMF2 80 PG- Manuals

5 The information listed below is for reference purposes only and does not necessarily have jurisdiction over local or state codes. Always consult with local authorities before installing any gas appliance. Duct Systems • US and CANADA: Air Conditioning Contractors Association (ACCA) Manual D, Sheet...

7 is a manually reset switch. DO NOT install jumper wires across these switches to defeat their function or reset a switch without identifying and correcting the fault condition. If a switch must be replaced, use only the correct sized part specifi ed in the Replacement Parts List provided online. T...

8 damper. All fl ue pipe joints should be fastened with sheet metal screws for rigidity. The chimney height, required draft, and number of appliances served by the chimney must be in accordance with all applicable codes. To prevent down draft, the chimney should extend at least 2 feet above the peak...

9 CIRCULATING AIR REQUIREMENTS WARNING: All supply ducts must be secured to the furnace with sheet metal screws and adequately sealed. When supply air is provided through the bottom of the unit, the joint between the furnace and the plenum must be air tight. The surface that the furnace is mounted o...

10 materials, fi xtures, are to be suitable for the expected ambient temperatures to which they will be subjected. • The negative pressure in the closet must not be less than minus 0.05 inches water column with the closet door closed and the fan operating at high speed. A reading below minus 0.05” i...

11 Figure 4. MA-200 Base Pan FRONT Combustion Air Knock-outs (7-1/4” X 2-1/4”) Feeder Duct Opening Flue Location 24 1/8 8 3/8 12 1/8 12 1/8 9 1/8 18 1/4 MA-200 Base Installation The MA-200 base is designed for O.E.M. and replacement installation of the CMF2 series furnace. The warm air duct system s...

13 Combustion Air Duct/Pipe Installation The CMF2 furnace must draw the combustion air from outside (except for special installations) and requires using the 2”X7” rectangular combustion air duct provided in the MA series base kit or the direct vent kit. See Table 2 (page 6) for special combustion a...

14 Figure 11. Vent Pipe Installation VENT PIPE FLUE PIPE OF FURNACE TURN TO LOCK- TIGHTEN SCREW RA-S4 RA-S3 RA-S2.5 4/12 3/12 2-1/2/12 None Flat NOTES: SRJ1 & SRJ2 Models are one piece constructionSRJ3, SRJ4, & SRJ5 Models are two piece construction-C Models are two piece construction OPTION...

15 FUEL CONNECTIONS • All gas piping must be installed in compliance with local codes and utility regulations. In the absence of local codes the gas line installation must comply with the latest edition of the National Fuel Gas Code (ANSI Z223.1) or (CAN/CGA B149.1 or .2) Installation Codes. • Some ...

17 Oil piping - PO Series Only The following procedures are recommended as good practice. However, requirements of local codes and ordinances, H.U.D. Manufactured Home and Safety Standards or National Fire Protection Association must be satisfi ed, where they apply, for an approved installation. • U...

18 • Electrical connections must be in compliance with all applicable local codes and ordinances, and with the current revision of the National Electric Code (ANSI/NFPA 70). • For Canadian installations, the electrical connections and grounding shall comply with the current Canadian Electrical Code ...

19 Thermostat Connections • Thermostat connections shall be in accordance with the instructions supplied with the thermostat and the indoor equipment. The low voltage wires must be properly connected to the units low voltage terminal block. Route R & W from the thermostat to the burner compartme...

21 Checking the Input of the FurnaceRefer to the furnace rating plate to determine the fi ring rate of the furnace. Using Table 4 (page 19), determine the appropriate orifi ce size for the fi ring rate and gas being used in your application. Check the burner orifi ce to ensure that it is the correct...

22 WARNING: Do not attempt to drill the gas orifi ces. Use only factory supplied orifi ces. Improperly drilled orifi ces may cause fi re, explosion, carbon monoxide poisoning, personal injury or death. At 2,000 feet, the NFGC requires that this appliance be derated 4% for each 1,000 feet of altitude...

23 burner motor (orange) control terminal by splicing or adding tab adapters. Seal and isolate any bare wires. See Figure 16. Firing Rate Conversion The rated fi ring rates of the CMF2 80 convertible furnaces (PO & PG) can be adjusted from the factory setting of 75,000 BTU/hr. The fi ring rate c...

24 • If control locks out 3 times, the control enters restricted lockout. To reset: Honeywell R7184: hold down the reset button for 45 seconds until the LED fl ashes once. Beckett 7505: hold down reset button for 15 seconds until the red light turns off and the yellow light turns on. 3. After fl ame...

25 24 volts supplied to gas valve during ignition but no main gas fl ow.• Gas valve may be defective. Replace if necessary.• Gas piping may be plugged. Check for adequate gas supply to gas valve at union. Main fl ame ignites but burner locks out.• Ignition control is not properly grounded. WARNING: ...

26 7. If the burner stays running, the system is operational.8. If the (LED indicator for R7184 control; green LED for 7505 control) is off, check the cad cell assembly after disconnecting the line voltage. See Table 9. COMPONENT FUNCTIONS Combustion Blower Centrifugal Switch The electric motor for ...

27 UNIT MAINTENANCE WARNING: Shut off all electrical power to the unit before performing any maintenance or service on the system. Failure to comply may result in personal injury or death. NOTE: All servicing of this heating appliance other than the normal maintenance described in this section must ...

28 FIGURES & TABLES Figure 17. CMF2 Physical Dimensions 57 24 14 18 2 18 23 58 2 14 13 58 16 9 2 12 5" 1 14 11 58 11 58 4" 3 1 8 6 14

29 WIRING DIAGRAM Figure 18. Wiring Diagram for CMF2 Gas & Oil Furnaces FA N SWITCH F AN ON/OFF SWITCH 321 DOOR SWITCH B URNER RECEPT A CLE N L1 AIR LIMIT DECK LIMIT 6 5 4 3 2 1 6 5 4 3 2 1 BLO WER MO T O R WHITE BLACK CMF2 Furnace TERMINAL HOUSING IGNIT O R CONTROL MODULE GAS VALVE IND L1 HSI H...

30 Figure 19. Furnace Components LOCATION OF FURNACE COMPONENTS Blower Assembly Blower Motor Capacitor Gas Valve Circulating Air Blower Oil Pump Door Switch Control Panel Heat Exchanger Base Control Control

INSTALLATION / PERFORMANCE CHECK LIST INSTALLER NAME: CITY: STATE: INSTALLATION ADDRESS: CITY: STATE: UNIT MODEL # UNIT SERIAL # Minimum clearances per Table 1 (page 4)? YES NO Is the unit properly installed and leveled? YES NO Does condensate drain properly in both drain tubes? YES NO Has the owner...