Goodman GMVC80 Two-Stage Variable-Speed ECM Gas Furnace Instruction Manual

Goodman GMVC80 Two-Stage Variable-Speed ECM Gas Furnace Instruction Manual

Standard Features

• Integrated communicating Comfort Bridge™ technology

• Two-stage gas valve provides quiet, economical heating

• Commissioning and diagnostics via on board
  Bluetooth with the Cool Cloud™ phone and tablet application

• Efficient and quiet variable-speed ECM circulator motor gently ramps up or down according to heating or cooling demand

• Sure Start® Silicon Nitride igniter designed for long igniter life

• Self-diagnostic control board with constant memory fault code history output to a triple 7-segment display

• Low constant fan speed circulates air throughout the home

• Quiet, two-speed induced draft blower

• California Low NOx emissions-compliant models available

• Can no longer be installed in California’s South Coast Air Quality Management District (SCAQMD) on or after October 1, 2019.

• AHRI Certified; ETL Listed

Cabinet Features

• Fully insulated, heavy-gauge steel cabinet with durable baked-enamel finish
• Multi-position installation: GMVC80: up flow, horizontal left or right GCVC80: downflow, horizontal left or right
• Removable bottom for side- or bottom-return applications
• Convenient left or right connection for gas/electric service
• Cabinet air leakage ≤ 2%
• Coil and furnace fit flush for most installations

• Complete warranty details available from your local dealer or at www.goodmanmfg.com. To receive the Lifetime Heat Exchanger Limited Warranty (good for as long as you own your home), 10-Year Unit Replacement Limited Warranty and 10-Year Parts Limited Warranty, online registration must be completed within 60 days of installation. Online registration is not required in California or Québec.

Nomenclature

1. Natural Gas BTU/h; for altitudes above from 0’ to 4,500’ above sea level, reduce input rating 4% for each 1,000’ above 4,500’ altitude. Low-fire rate is 70% of high-fire rate.
2. DOE AFUE based upon Isolated Combustion System (ICS)
3. Minimum Circuit Ampacity = (1.25 x Circulator Blower Amps) + ID Blower amps. Wire size should be determined in accordance with National Electrical Codes. Extensive wire runs will require larger wire sizes.
4. Maximum Overcurrent Protection Device refers to maximum recommended fuse or circuit breaker size. May use fuses or HACR-type circuit breakers of the same size as noted.

Notes

• All furnaces are manufactured for use on 115 VAC, 60 Hz, single-phase electrical supply.
• Gas Service Connection ½” FPT
• Important: Size fuses and wires properly and make electrical connections in accordance with the National Electrical Code and/or all existing local codes.

Specifications

1. Natural Gas BTU/h; for altitudes above from 0’ to 4,500’ above sea level, reduce input rating 4% for each 1,000’ above 4,500’ altitude. Low-fire rate is 70% of highfire rate.

2. DOE AFUE based upon Isolated Combustion System (ICS)

3. Minimum Circuit Ampacity = (1.25 x Circulator Blower Amps) + ID Blower amps. Wire size should be determined in accordance with National Electrical Codes.
   Extensive wire runs will require larger wire sizes.

4. Maximum Overcurrent Protection Device refers to maximum recommended fuse or circuit breaker size. May use fuses or HACR-type circuit breakers of the same size as noted.

Notes

• All furnaces are manufactured for use on 115 VAC, 60 Hz, single-phase electrical supply.
• Gas Service Connection ½” FPT
• Important: Size fuses and wires properly and make electrical connections in accordance with the National Electrical Code and/or all existing local codes.

Minimum Clearances to Combustible Materials

C = If placed on combustible floor, the floor MUST be wood ONLY.

Notes:

• For servicing or cleaning, a 24” front clearance is recommended.
• Unit connections (electrical, flue, and drain) may necessitate greater clearances than the minimum clearances listed above.
• In all cases, accessibility clearance must take precedence over clearances from the enclosure where accessibility clearances are greater.
• Refer to the appropriate USA and Canadian codes:

– In the USA: the National Fuel Gas Code NFPA 54 / ANSI Z223.1
– In Canada: the Canada National Standard of Canada, CAN/CSA B149.1 and CAN/CSA B142.2

GCVC80 Dimensions

Minimum Clearances to Combustible Materials

Approved for line contact in the horizontal position.

1. 24” clearance for serviceability recommended.
2. Single Wall Vent (SW) to be used only as a connector. Refer to the venting tables outlined in the Installation Manual for additional venting requirements.

All furnaces ship as high speed for cooling. Installer must adjust blower speed as needed.
For most jobs, about 400 CFM per ton when cooling is desirable.
Do not operate above .5” w.c. ESP in heating mode. Operating CFM between .5” and .8” w.c. is tabulated for cooling purposes only

Airflow Data (cont.)

GCVC Continuous Fan Speeds

GCVC8 Minimum Filter Sizes

Note: Other size filters of equal or greater surface area may be used; filters may also be centrally located.
¹ Use 2 – 16 X 25 filters on side returns or 20 X 25 filter on bottom return if furnace is connected to a cooling unit over 4 tons nominal capacity

GMVC Continuous Fan Speeds

GMVC8 Minimum Filter Sizes

Note: Other size filters of equal or greater surface area may be used; filters may also be centrally located.
¹ Use 2 – 16 X 25 filters on side returns or 20 X 25 filter on bottom return if furnace is connected to a cooling unit over 4 tons nominal capacity

Accessories

Wiring Diagram

Wiring is subject to change. Always refer to the wiring diagram or the unit for the most up-to-date wiring.

Warning

High Voltage : Disconnect all power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury, or death

Goodman Manufacturing Company, L.P., reserves the right to discontinue, or change at any time, specifications or designs without notice or without incurring obligations. © 2021 • Goodman Manufacturing Company, L.P. • Houston, Texas • Printed in the USA.

References

• Air Conditioning and Heating Systems| HVAC | Goodman

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