Counterflow Gas or Oil Heating Appliance Installation Instructions CMF3 70-PG Convertible (60, 70, & 75 KBTU/H Inputs) CMF3 70-PO Convertible (60, & 70 KBTU/H Inputs) For installation in: • Manufactured Homes • Recreational Vehicles, Park Models, & Manufactured Buildings • Modular Homes/Buildings WARNING FIRE OR EXPLOSION HAZARD • Failure to follow safety warnings exactly could result in serious injury or property damage.
TABLE OF CONTENTS Important SAFETY INFORMATION...........................3 START-UP & ADJUSTMENTS........................................17 Requirements & CODES...........................................3 Pre-Start Check List......................................................17 General Information.......................................................4 Operating Instructions for PG Direct Ignition Burner.....18 Operation of Furnace During Construction....................
Important SAFETY INFORMATION INSTALLER: Please read all instructions before servicing this equipment. Pay attention to all safety warnings and any other special notes highlighted in the manual. Safety markings are used frequently throughout this manual to designate a degree or level of seriousness and should not be ignored. WARNING indicates a potentially hazardous situation that if not avoided, could result in personal injury or death.
• Have battery back-up power; • Meet ANSI/UL 2034 Standards and comply with NFPA 720 (2005 Edition); and Approved and listed by a Nationally Recognized Testing Laboratory as recognized under 527 CMR. c.) A Product-approved vent terminal must be used, and if applicable, a product-approved air intake must be used. Installation shall be in strict compliance with the manufacturer’s instructions.
Minimum Installation Clearances • Access for positioning and servicing the unit must be considered when locating unit. The need to provide clearance for access to panels or doors may require clearance distances over and above the requirements. • This appliance must be installed in accordance with clearances listed in Table 1. The furnace must be installed with ample clearance for easy access to the air filter, blower assembly, burner assembly, controls, and vent connections.
General Information WARNING: This furnace must be installed by a qualified installing agency and in accordance with applicable local codes and ordinances that govern this type of equipment. Failure to properly install the furnace, base assembly, and venting system as described herein may damage the equipment and/or the home, can create a fire or asphyxiation hazard, violates U.S. listing requirements, and will void the warranty.
Ventilaire III or IV (Accessory Item) CIRCULATING AIR REQUIREMENTS CAUTION: MAINTAIN 2 1/2” MINIMUM CLEARANCE BETWEEN FLUE PIPE AND FLEX DUCT. FAILURE TO COMPLY WITH THIS RESTRICTION COULD CAUSE EQUIPMENT DAMAGE. VENTILAIRE III ILLUSTRATED OTHER LISTED VARIATIONS AVAILABLE. CHECK WITH MANUFACTURER. The Ventilaire air quality packages are available to meet the ventilation requirements as outlined in H.U.D. Standard Part 3280.103 (b) (2).
Unconditioned Spaces All duct work passing through unconditioned space must be properly insulated to minimize duct losses and prevent condensation. Use insulation with an outer vapor barrier. Refer to local codes for insulation material requirements Closet Installations WARNING: Failure to comply with the the following instructions may result in fire, asphyxiation or carbon monoxide poisoning.
Locating the Unit • Survey the homes layout to determine the best location for installing the unit. Consideration should be given to availability of electric power, service access, and noise. • The dimensions of the room or alcove must be able to accommodate the overall size of the unit and the installation clearances in Table 1 (page 4). Physical dimensions for this furnace are shown in Figure 17 (page 24). • The unit must be leveled at installation and attached to a properly installed duct system.
Installing the Furnace on an MA-200 Base 1. Carefully lift the furnace over the base pan and set into position. The flange on the back of the furnace should rest on the inside rails of the base. 2. Raise the front of the furnace to clear the gasket on the bottom of the furnace and slide the back until the rear flange drops into the channel at the rear of the base. NOTE: Do not damage the combustion air adapter, if present, while positioning the unit.
SRJ Roof Jack Installation Required ceiling and roof cut-out openings must be accurately located to prevent hazardous misalignment of the furnace and roof jack. Figure 8 displays a typical installation for maufactured housing applications. Refer to Figure 9 (page 12) to determine appropriate SRJ roof jack and accessories required for your installation. Install only SRJ series roof jack as specified on the furnace label. NOTE 1: Depending on the slope of the roof, a roof jack adaptor may be needed.
RA-S4 4/1 14" Removable SRJ3, SRJ4, & SRJ5 25" Removable All -C Models 2 RA-S3 RA-S2.5 3/12 Adaptor SRJ5 37" to 48" SRJ4 25" to 36" SRJ3 13" to 24" SRJ2 12" or Less SRJ1 2-1/2 /12 None 49" to 59" Flat When roof pitch is: Use Adaptor Model No. 1/2 Minimum Furnace CMF Series Ceiling Trim Plates When Ceiling Cavity is: Use Roof Jack Model No.
Fuel Connections Gas piping - PG Series Only WARNING: FIRE OR EXPLOSION HAZARD • Failure to follow safety warnings exactly could result in serious injury or property damage. • Installation and service must be performed by a qualified installer, service agency or the gas supplier. • Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance.
12% at 3,000 feet, etc. This deration is in reference to the input rate and gas heating value at sea level. High altitude conversion for this furnace requires reducing the orifice size or decreasing the manifold pressure. When decreasing the manifold pressure, the pressure must not be set below 3.2 in WC. If the pressure needs to be set below 3.2 in WC to achieve proper deration, then change the orifice size and raise the manifold pressure back to 3.5 in WC.
Fuel Line Hook-Up: Two Line System Two line systems should only be used when the vertical lift exceeds 8 feet. 1. Install the oil feed line as outlined in the Hook-up Procedure. 2. Install the oil pump bypass plug in the bottom return port. 3. Run the return line up through the furnace base to the return port of the pump. Run the other end of the line to the tank, using 3/8” O.D. copper tubing or 1/4” pipe with the ends capped, and routing the line so it stays clean. 4.
CMF 70 PG CMF 70 PO Convertible Convertible Factory Set Firing Rate (btu/hr)* 70,000 70,000 Heating Capactiy (btu/hr) 56,000 56,000 Kit Converted Firing Rate (btu/hr)** 60,000 or 75,000 60,000 80+ 80+ AFUE Rating (%) Orifice Number (Natural Gas) 22 N/A Orifice Number (Propane Gas) 41 N/A N/A 0.50 gph; A; 80o Burner Nozzle for Oil Blower D x W 10 x 7 10 x 7 1/4 -3 -PSC 1/4 -3 -PSC Motor FLA 3.3 Amps 3.3 Amps Fuse or Breaker 15 Amps 15 Amps Motor H.P. - Speed -Type Nom.
START-UP & ADJUSTMENTS CAUTION: To avoid personal injury or property damage, make sure the motor leads do not come into contact with any uninsulated metal components of the unit. • High Speed Operation: Connect the black wire from the fan switch to the black wire of the blower motor. • Medium Speed Operation: Connect the black wire from the fan switch to the blue wire of the blower motor. NOTE: This is the factory default setting and should not be changed if high speed operation is desired.
√ Verify the roll-out and manual reset switch is closed. If necessary, press the red button to reset a switch. DO NOT install a jumper wire across a switch to defeat its function. If a switch reopens on startup, DO NOT reset the switch without identifying and correcting the fault condition. √ Verify the blower door is in place, closing the door switch in the line voltage circuit. √ Verify the gas line and all connections are leak free.
OUTLET TAP INLET TAP Regulator Converter Figure 14. Direct Ignition Gas Valve Input (BTU/H) Natural Gas Setting LP Gas Setting 60,000 4.0 4.5 2.0 70,000 4.5 4.5 2.25 75,000 5.0 5.0 N/A Oil Setting Table 5. Air Shutter Setting for Different Fuels WARNING: Do not attempt to drill the gas orifices. Use only factory supplied orifices. Improperly drilled orifices may cause fire, explosion, carbon monoxide poisoning, personal injury or death.
Cordset Bypass Solenoid Valve Pressure Adjustment Screw Nozzle Port 3/16 Flare Fitting Beckett Inlet Port 1/4 NPTF INLET USE ONLY WITH VALVE ON DELAY A2EA-6520 4 GPH 100-150 PSI 3450 RPM NO. 2 & LIGHTER FUEL 3 GPH 150-200 PSI 3450 RPM INLET NO. 2 FUEL BY-PASS Made by Suntec Exclusively for Beckett Bleed & Gauge Port Inlet Port 1/4 NPTF Return Port - Install 1/6” Bypass Pipe Plug for 2-pipe System Only. (Use 5/32” Allen Wrench) Figure 15.
5. The furnace runs until the demand for heat is satisfied and the burner shuts down. 6. The circulating air blower will de-energize when the temperature fan switch opens. Troubleshooting WARNING: ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury or property damage. Improper servicing could result in dangerous operation, serious injury, death or property damage. • Before servicing, disconnect all electrical power to furnace.
Burner operates, insufficient heat • • • • • Check the thermostat for proper setting and location. Check for clean air filters and proper air flow. Check burner for proper gas firing rate. Verify unit is not undersized for its thermal load. Check thermostat anticipator. (0.6 amps) Burner does not shut off. NOTE: Burner will stop when the door switch is open. With the door open, secure the door switch in the closed position by depressing the switch.
Oil Furnace The indicator lights on the oil primary control provides lockout, recycle, and cad cell indications. See Table 6. UNIT Maintenance WARNING: Component Functions The descriptions below are various functional components that affect the operation and shutting down of this furnace. Various furnace components and their locations are shown in Figure 19 (page 26).
FIGURES & TABLES 1 14" 1 22" 16" 9" 5" 3 34" 1 24 4 " 18" 1 23 4 " 2" 57" 3 13 4 " 5 11 8 " 1 38" 1 64" 4" 5 11 8 " Figure 17.
Wiring Diagram WIRING DIAGRAM CMF3 Furnace Series 120 Volt Single Phase / 60 Hz NOTES: 1. Incoming power must be polarized. Observe color coding. (See furnace data label for electrical information.) 2. If any of the original wires (as supplied with the appliance) must be replaced, use 105˚C Thermoplastic type wire or its equivalent. 3. Use copper conductors only.
furnace Components Blower Motor Heat Exchanger Capacitor Blower Assembly Control Panel Door Switch Gas Valve Circulating Air Blower Oil Pump Base Figure 19.
INSTALLATION CHECKLIST ELECTRICAL SYSTEM INSTALLER NAME: CITY: STATE: INSTALLATION ADDRESS: CITY: YES NO Line voltage polarity correct? YES NO Supply Voltage:...............................................................
