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gas-fired indoor gravity and power vented duct furnaces
DFG/IFG
WARNING
1. Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, injury or death, and could cause
exposure to substances which have been
determined by various state agencies to
cause cancer, birth defects or other
reproductive harm. Read the installation,
operating and maintenance instructions
thoroughly before installing or servicing this
equipment.
2. Installing, starting up and servicing heating,
ventilation and air conditioning equipment
poses significant hazards and requires
specialized knowledge of Modine products
and training in performing those services.
Failure to have any service properly
performed by, or making any modification to
Modine equipment without the use of,
qualified service personnel could result in
serious injury to person and property,
including death. Therefore, only qualified
service personnel should work on any
Modine products.
CAUTION
To prevent premature heat exchanger failure
do not locate ANY gas-fired units in areas
where chlorinated, halogenated, or acid vapors
are present in the atmosphere.
PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB.
INSTALLATION AND SERVICE MANUAL
DFP/IFP
THIS MANUAL IS THE PROPERTY OF THE OWNER.
5-564.4
models DFG and DFP
DFP and IFP models are approved
for use in California by the CEC.
FOR YOUR SAFETY
IF YOU SMELL GAS:
1. Open windows.
2. Don't touch electrical switches.
3. Extinguish any open flame.
4. Immediately call your gas supplier.
FOR YOUR SAFETY
The use and storage of gasoline or other
flammable vapors and liquids in open
containers in the vicinity of this appliance is
hazardous.
Inspection on Arrival
1.
Inspect unit upon arrival. In case of damage, report it
immediately to transportation company and your local
factory sales representative.
2.
Check rating plate on unit to verify that power supply meets
available electric power at the point of installation.
3.
Inspect unit upon arrival for conformance with description of
product ordered (including specifications where applicable).
5-564.4
5H0806370001
May, 2021
IFG and IFP

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Sommaire des Matières pour Modine DFG

  • Page 1 Failure to have any service properly product ordered (including specifications where applicable). performed by, or making any modification to Modine equipment without the use of, qualified service personnel could result in serious injury to person and property, including death. Therefore, only qualified service personnel should work on any Modine products.
  • Page 2: Table Des Matières

    Maintenance ...................18-19 approved service replacement parts. A complete replacement Service & Troubleshooting..............20-22 parts list may be obtained by contacting Modine Manufacturing Company. Refer to the rating plate on the Replacement Parts Ordering ...............23 appliance for complete appliance model number, serial Model Identification................24...
  • Page 3: Si (Metric) Conversion Factors

    SI (METRIC) CONVERSION FACTORS / UNIT LOCATION Figure 3.1 - Combustible Material and Service SI (METRIC) CONVERSION FACTORS Clearances Table 3.1 To Convert Multiply By To Obtain To Convert Multiply By To Obtain "W.C. 0.24 1.699 /min psig 6.893 Btu/ft 0.0374 mJ/m °F...
  • Page 4: Unit Suspension

    UNIT SUSPENSION / INSTALLATION Air Distribution Baffle Removal UNIT SUSPENSION The duct furnaces are supplied with a factory installed air baffle. Be sure the means of suspension is adequate to support the For applications where an air temperature rise less than 60°F weight of the unit (see Dimensional Data for unit weights).
  • Page 5 INSTALLATION Figure 5.1 - Typical Duct & Airflow Installation 3" Max. Turning Vanes 3" Min. Baffle 12" 12" 3" Min. Min. Min. Turning SIDE SIDE 3" Max. Vanes Baffle 24" 15° Max. 12" Min. 12" Min. Dimensions “B” should never be less than of “A”.
  • Page 6: Venting

    VENTING Figure 6.1 - Vertical Category I Vent System 4. For Category I vent systems limit length of horizontal runs to 75% of vertical height. Install with a minimum upward slope 10 FEET OR LESS from unit of 1/4 inch per foot and suspend securely from LISTED TO ROOF PEAK TERMINAL...
  • Page 7 Unit can be vented with 5" diameter pipe if a 6" to 5" reducer is used. Otherwise, use 6" pipe. 3. The vent terminal must be Modine part number: • 5H072285-0001 (Item Code 27866) for 4" vent pipe • 5H072285-0004 (Item Code 27867) for 5" vent pipe •...
  • Page 8: Gas Connections

    INSTALLATION Gas Connections Figure 8.1 - Recommended Sediment Trap/Manual Shut-off Valve Installation - Side or Bottom Gas WARNING Connection 1. All field gas piping must be pressure/leak tested prior to operation. Never use an open flame. Use a soap solution or equivalent for testing.
  • Page 9: Considerations For Elevation

    Altitude (ft) Natural Gas Propane Table 9.3 shows the contents of the kit. For more information, 0-2,000 1,050 2,500 refer to the latest revision of Modine Bulletin 75-530. 2,001-3,000 929 l 2,212 m 3,001-4,000 892 l 2,123 m Table 9.2 - High Altitude Kit Selection Table jk...
  • Page 10: Electrical Connections

    INSTALLATION / START-UP PROCEDURE Electrical Connections START-UP PROCEDURE IMPORTANT WARNING Start-up and adjustment procedures should be performed by a 1. Disconnect power supply before making wiring qualified service agency. connections to prevent electrical shock and equipment damage. 2. All appliances must be wired strictly in accordance with 1.
  • Page 11 START-UP PROCEDURE Pilot Burner Adjustment To Adjust the Manifold Pressure 1. Move the field installed manual shut-off valve to the “OFF” The pilot burner is orificed to burn properly with an inlet pressure position. of 6-7" W.C. on natural gas and 11-14" W.C. on propane gas, but 2.
  • Page 12: Air Shutter Adjustment

    START-UP PROCEDURE Air Shutter Adjustment Single Furnace Controls Proper operation provides a soft blue flame with a well-defined Staged Control (Digit 12=1 or 2): inner core. A lack of primary air will reveal soft yellow-tipped These units utilize a single- or two-stage combination gas valve, flames.
  • Page 13: Variable Air Movement Applications

    START-UP PROCEDURE Variable Air Movement Applications and 4-20 mA signal when all the dip switches are in the “ON” position. The modulating valve is modulated open or When the air mover supplied by others can provide variable air closed based on the voltage from the amplifier (less gas movement (i.e.
  • Page 14: Options

    OPTIONS Gas Control Options o Air Flow Proving Switch The air flow proving switch is factory installed in the duct The unit must be reviewed to determine if any of the listed gas furnace electrical junction box. The air flow proving switch control options were supplied.
  • Page 15: Performance

    PERFORMANCE Table 15.1 - Air Temperature Rise jkl Air Temperature Rise Through Unit (°F) Model Input Output Size (Btu/Hr) (Btu/Hr) 20 m 40 m 50 m 75,000 60,750 2,813 1,406 1,125 100,000 81,000 3,750 1,875 1,500 1,250 1,154 1,071 1,000 125,000 101,250 4,688 2,344...
  • Page 16: Dimensional Data

    DIMENSIONAL DATA Figure 16.1 - Indoor Gravity Vented Duct Furnace Dimensions 22.90 2.25 H (PREMIUM/ELEC. MOD.) 18.39 (MOUNTING HOLES) H (STANDARD) 3.16 F (MOUNTING HOLES) J (DIA. ROUND) 2.00 PREMIUM 7.33 CONTROL (DUCT SIZE) 5.13 10.26 8.97 D (DUCT SIZE) Table 16.1 - Indoor Gravity Vented Duct Furnace Dimensions Model Size Dimensions...
  • Page 17 DIMENSIONAL DATA Figure 17.1 - Indoor Power Vented Duct Furnace Dimensions 18.39 F (MOUNTING HOLES) (MOUNTING HOLES) J (ROUND) PREMIUM E (DUCT SIZE) 1.41 CONTROL 8.965 10.50 22.907 D (DUCT SIZE) Table 17.1 - Indoor Power Vented Duct Furnace Dimensions Model Size Dimensions Control Panel...
  • Page 18: Maintenance

    To check the burner port and pilot to Modine equipment without the use of, qualified service burner orifice, see Burner and Pilot Assembly Removal. personnel could result in serious injury to person and 3.
  • Page 19 MAINTENANCE Figure 19.1 - Manifold Assembly Removal Figure 19.2 - Burner and Pilot Assembly Removal AIR SHUTTERS (NOT SHOWN) ARE LOCATED ON THE ORIFICES PILOT ASSEMBLY ELECTRICAL JUNCTION IGNITION CABLE PILOT SUPPLY LINE MANIFOLD SERIAL PLATE BURNER SIDE ACCESS PANEL Model DFP is shown, but also applies to all models.
  • Page 20: Service & Troubleshooting

    SERVICE & TROUBLESHOOTING Table 20.1 - Troubleshooting Trouble Possible Cause Possible Remedy Power Exhauster Motor will not start 1. Power supply is off. 1. Turn on main power. 2. No 24V power to thermostat. 2. Check control transformer. (Model Digit 3=P only) 3.
  • Page 21 SERVICE & TROUBLESHOOTING Trouble Possible Cause Possible Remedy Not Enough Heat 1. Unit cycling on high limit. a. Obstructions/leaks in duct system. a. Clean/correct duct system. b. Main pressure set too high. b. Adjust to a maximum of 14" W.C. c.
  • Page 22 Aftermarket power venter systems are readily : system  available for these applications. While Modine has not tested and therefore does not endorse Install aftermarket any specific system, example manufacturers include Tjernlund and Field Controls. It is the...
  • Page 23: Replacement Parts Ordering

    Ordering When servicing, repairing or replacing parts on these units, on the side of unit. The Modine Manufacturing Company part locate the serial plate of the unit and always give the complete number for some common replacement parts are listed on the Model Number and Serial Number from the serial plate.
  • Page 24: Model Identification

    MODEL IDENTIFICATION Indoor Gravity and Power Vented Duct Furnace Model Nomenclature 4 5 6 Product Type (PT) 11 - Gas Type (GT) D or I - Indoor Unit N - Natural with continuous retry ignition controller P - Propane with lockout ignition controller Unit Configuration (UC) F - Furnace 12 - Gas Valve (GV)
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  • Page 28: Commercial Warranty

    Burners High Intensity Infrared Units Sheet Metal Parts All Products As Modine Manufacturing Company has a continuous product improvement program, it reserves the right to change design and specifications without notice. Modine Manufacturing Company 1500 DeKoven Avenue Racine, WI 53403 Phone: 1.800.828.4328 (HEAT)

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