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always verify orifice sizing and spring pressure adjustments during the conversion process
Connecting it to a lower voltage will result in insufficient torque and potential electrical damage to the unit
offering identical performance and physical dimensions for direct field replacement
This heater is strictly for 480V high-voltage systems and will not function correctly on 208/230V or 575V equipment
Nordyne 661021R Orifice 322838-752 always verify orifice sizing andThe Nordyne 661021R Orifice is a precision engineered Natural Gas Main Burner Orifice designed to maintain exact fuel to air ratios in residential heating systems. Featuring a #21 drill size (nominal . 021 diameter), this OEM component is a direct replacement for the Nortek 661021, ensuring calibrated gas flow for the MG1E 077 gas furnace and compatible mobile home heating units. For a technician in the field, using a correctly sized burner orifice is
