Nortron D SERIES User Manual

D SERIES ELECTRIC FURNACE
FB0004
INSTALLATION AND USER MANUAL
IMPORTANT
: READ AND SAVE THESE INSTRUCTIONS.
MODELS: 21D10, 21D15, 21D18, 21D20, 21D23, 21D25 AND 21D27
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Nortron D SERIES Specifications

General

Brand	Nortron
Model	D SERIES
Category	Furnace
Language	English

Summary

General Requirements and Specifications

Operating Options

Breakers

Installation Notes

Cold Air Return

Details on attaching the cold air return duct to the furnace sides, rear, or bottom.

Electrical Wiring - Power Supply

Instructions for connecting the power supply, emphasizing proper grounding and wire gauge.

Connecting and Adjusting the Low Voltage Thermostat

Guide for wiring thermostat and setting the heat anticipator for optimal furnace operation.

Use in Mobile Homes

Using Optional Equipment

Two-Stage or Outdoor Thermostat

Guidance on connecting and using two-stage or outdoor thermostats with the furnace.

Air Conditioning

Information on integrating air conditioning with the furnace, including coil placement and airflow.

Electronic Air Cleaners and/or Powered Furnace Humidifiers

Details on using an adapter kit to power 120V air cleaners and humidifiers.

Interlock Connection

Procedure for connecting the electric furnace with other devices like wood furnaces.

Wiring Diagrams

21D10 Model Wiring

Detailed wiring diagram for the Nortron D Series 21D10 electric furnace.

21D15 Model Wiring

Detailed wiring diagram for the Nortron D Series 21D15 electric furnace.

21D18 & 21D20 Models Wiring

Detailed wiring diagrams for Nortron D Series 21D18 and 21D20 electric furnaces.

21D23 & 21D25 Models Wiring

Detailed wiring diagrams for Nortron D Series 21D23 and 21D25 electric furnaces.

21D27 Model Wiring

Detailed wiring diagram for the Nortron D Series 21D27 electric furnace.

Service Parts

Maintenance

Troubleshooting