Intertherm MG1E Series Gas Furnace Technical Specifications

Overview

The Intertherm MG1 Series furnace is designed for all sizes of manufactured and modular homes. These units incorporate high efficiency, reliability, and low maintenance. Units may be installed free standing in a utility room or enclosed in an alcove or closet. MG1 Series furnaces are available in A/C adaptable or A/C ready, with or without coil cavity box and many burner options.

Features and Benefits

• Sealed Combustion System: Vents exhaust gas directly outdoors and draws in 100% outside air for the burner.
• Easy Open Pawl Latch: Secures the door firmly for transit, yet allows easy removal for access.
• Choice of Air Conditioning Options: From 2 to 4 tons A/C ready.
• Large, Effective Air Filter: Room air is cleaner with this permanent washable filter.
• High Efficiency Drum Heat Exchanger: Delivers optimum heat transfer with low air resistance.
• Appliance Quality Door: Protects against rust and other corrosion. Baked enamel finish allows for easy cleaning.
• Fully Insulated Cabinet: Insures minimized heat loss and quiet operation.
• Reliable Burner: With uniform flame pattern extends life of heat exchanger.

California Emissions Note

For California installations in SCAQMD only: This furnace does not meet the SCAQMD Rule 1111 NOx emission limit (14 ng/J), and thus is subject to a mitigation fee of up to $450. This furnace is not eligible for the Clean Air Furnace Rebate Program: www.CleanAirFurnaceRebate.com.

Components

The diagram shows the internal components of the furnace. Key components include:

• Blower Assembly
• Combustion Blower
• Burner Assembly
• Main Air Limit Transformer
• Choke
• Auxiliary Line
• Control Board Location (Component Not Shown)

Model Identification Code

The model identification code provides detailed information about the furnace configuration. The structure is as follows:

M G1E – [Input BTU] [Configuration] [Cabinet Type] [Voltage/Phase] [Stage]

• Manufactured Housing: 'M' prefix
• Series: 'G1E'
• Input Heating Capacity (BTU): 056 (56,000), 070 (70,000), 077 (77,000), 090 (90,000)
• Configuration: F (Front Return Downflow), T (Top Return Downflow), U (Upflow)
• Cabinet Type: A (No Evap Coil Cabinet), B (Cabinet fits 18' nominal coil heights), C (Cabinet fits 24" nominal coil heights or smaller)
• Voltage/Phase: A (120V, 1 Phase, 60 Hz)
• Stage: 1 (Single Stage), 2 (Two Stage)
• Revision: Indicates cabinet width (M=Manufactured Housing, B=17.5", C=21.0") and coil cabinet fit (A=No Evap Coil, B=18' coil, C=24" coil or smaller).

Specifications

Electrical Supply: 120 volts, 60HZ, 1 Ph.

Fuse or Breaker: 15 amps

Temperature Rise: 45°F to 75°F

Gas Connection: 1/2" NFPT

Thermostat Circuit: 24 volts, 60HZ, 30 vac

Normal Anticipator Setting: 0.4

Manifold Pressure: Natural Gas: 3.5" w.c. LP Gas: 10" w.c.

High Altitude: Tables in the Installation Instructions for elevations above 2,000 feet.

Dimensions and Clearances

The furnace has a vertical, rectangular form factor. Model "A" is without a coil cabinet, and Model "B" includes a coil cabinet.

Dimensions:

• Height ("A" Model without Coil Cabinet): 56 inches
• Height ("B" Model with Coil Cabinet): 76 inches
• Width: 20 inches
• Depth: 23 3/4 inches

Clearances

Blower Performance - Heating Airflow (CFM) & Temperature Rise (°F)

The following tables detail blower performance for heating mode, showing airflow (CFM) and temperature rise (°F) at various external static pressures (IN. W.C.) for different motor speeds.

Notes: 1. To comply with government mandated efficiency standards, two openings are required for airflows above 1,600 CFM. 2. Data is shown without filter. 3. Temperature rises in the table are approximate. Actual temperature rises may vary. 4. Speed settings shaded in gray are not allowed in HEAT mode. 5. The "*" denotes the factory heat and cool setting. If a different motor speed is needed, the appropriate wire from the "HEAT" or "COOL" tap on the control board must be connected to the desired Tap (1-5) at the motor.

MG1E-056F1A(A,B)M1 (56,000 BTU/Hr)

MG1E-070F1A(A,B)M1 (70,000 BTU/Hr)

MG1E-077F1AAM1 (77,000 BTU/Hr)

MG1E-090F1AAM1 (85,000 BTU/Hr)

Blower Performance - Cooling Airflow (CFM)

The following tables detail blower performance for cooling mode, showing airflow (CFM) at various external static pressures (IN. W.C.) for different motor speeds.

Notes: 1. To comply with government mandated efficiency standards, two openings are required for airflows above 1,600 CFM. 2. Data is shown without filter. 3. The "*" denotes the factory heat and cool setting. If a different motor speed is needed, the appropriate wire from the "HEAT" or "COOL" tap on the control board must be connected to the desired Tap (1-5) at the motor.

MG1E-056F1AAM1 (56,000 BTU/Hr)

MG1E-070F1AAM1 (70,000 BTU/Hr)

MG1E-077F1AAM1 (77,000 BTU/Hr)

MG1E-090F1AAM1 (85,000 BTU/Hr)

Accessories

The following tables list available accessories, plenum connectors, roof jacks, and flue extensions with their respective part numbers.

Accessories

Vent Kits

Plenum Connectors

Sloped Roof Flashings

Roof Jack

Flue Extensions

Warranty and Legal Information

GENERAL TERMS OF LIMITED WARRANTY
For complete details of the Limited Warranty, including applicable terms and conditions, see your local installer or contact the Nortek Global HVAC, LLC warranty department for a copy.

Before purchasing this appliance, read important energy cost and efficiency information available from your retailer. Specifications and illustrations subject to change without notice and without incurring obligations. Printed in U.S.A (08/2019)

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