Thermo Products CMA3-50D36N, CMC1-50DV3N Electrical Wiring, Electrical Branch Supply Circuit

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All installations and services must be performed by qualified service personnel.

L.ELECTRICAL WIRING

All wiring shall be performed by a qualified electrician or service person. The wiring must comply with local codes, the instructions in this manual, and in the absence of codes with the National Electrical Code ANSI/NFPA-70 (LATEST EDITION).

1. Electrical Branch Supply Circuit

Route all electrical wiring to the left side of the furnace. The power supply circuit to the furnace must be installed and grounded in accordance with the provisions of the National Electrical Code, ANSI/NFPA-70-1999, or latest edition, and all local codes having jurisdiction.

2.Connection Of Power Supply Wires

a.Remove the cover from junction box.

b.Insert 115 VAC wires through the strain relief bushing (or conduit connection as applicable) on the left side of the furnace junction box.

c.Connect the “hot” wire to the black wire.

d.Connect the “neutral” wire to the white wire.

e.Connect the “ground” wire to the green wire.

f.Reinstall and secure the junction box cover with the original mounting screws.

NOTICE: The hot surface igniter and operation of this furnace depends on correct polarity. The hot leg of the supply circuit must be connected to the black line lead (L1) and the common leg (L2) to the white line lead in the field mounted junction box. The hot leg must pass through the disconnect switch in all cases to prevent the hazard of electrical shock when servicing.

IMPORTANT: The furnace must be grounded in accordance with local codes and with the National Electrical Code, ANSI/NFPA NO. 70 (Latest Edition) when an external electrical source is utilized.

3. Connection Of Room Thermostat Wires

NOTE: Class 1 thermostat wire must be used inside the furnace burner compartment.

a.Insert 24 VAC wires through the plastic grommet on the left side of the furnace casing.

b.Connect the thermostat wires to the W/R 50A65-143 control (refer to the wiring diagram).

c.Connect the thermostat wires to the room thermostat.

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Contents GAS Fired High Efficiency Furnace Table of Contents Section Safety Information Page Page Page Page Page Model II. Furnace SpecificationsCMC1-50D36 CMC1-75D36 CMC1-50DV3 CMC1-75DV3 Description QTY Installation Parts PackagesPage Combustible Material NON-COMBUSTIBLE MaterialModels CMA3/CMC1 IV. General Installation Furnace Location Coil Cabinet Model CE113S / CE213T Page Cottage Base Model 01COT Base for CMA3 models only Closet Installation Alcove InstallationCMA3 Series CMC1 Series Fuel Piping General Venting Requirements Maximum Vent Length Connecting the Exhaust Vent and Combustion AIR Intake Page Page Page Page Vent Terminal Location Guidelines Connecting the Furnace to Roof Vent / AIR Terminations Page Condensate Drain Line and Trap Assembly Electrical Branch Supply Circuit Electrical WiringAWG Blower Delay Settings Blower Motor Speed WiringCMA3-50D36 CMA3-75D36 CMC1-50D36 CMC1-75D36 CMC1-50DV3 CMC1-75DV3 Field Wiring and Replacing Wiring Starting the Unit Sequence of Operations END Cycle Operating Instructions Initial Start UPAdjustment of BTU Input Rate Burner Adjustment GAS Pressure Chart for CMA*/CMC* Model FurnacesSetting Temperature Rise Furnace Checkout Procedure VII. Dealer Maintenance VI. Installers Instructions to UserInducer Blower Assembly Condensate LINE/TRAP AssemblyElectrical General Inspection Vent Pipe Combustion AIR IntakeGASKETS/SEALING Materials Cleaning the Coil AIR SideHeat Exchanger House AIR BlowerFilter Maintenance Procedure Filter ReplacementDiagnostic Features LED will also flash once at power-up Setting Above AT the Integrated CONTROL? After GAS Valve OPENS, do Burners IGNITE? Is LED Light If LED Light Flashes FLASH, then Pause System Lockout Appendix a Replacement Parts Page Page Page Appendix B Wiring Diagrams

CMC1-75DV3N, CMA3-75D36N, CMA3-50D36N, CMC1-75D36N, CMC1-50D36N specifications

Thermo Products offers a versatile range of heating solutions that cater to various industrial and commercial applications. Among their popular models are the CMC1-75DV3N, CMC1-50DV3N, CMA3-50D36N, CMC1-50D36N, and CMC1-75D36N. Each model is engineered to deliver efficient performance and durability, making them ideal for meeting diverse heating needs.

The CMC1-75DV3N is tailored for high-capacity heating requirements, featuring advanced heating technology that ensures rapid and consistent heating. Its robust design includes high-efficiency burners, and the unit is built with durable materials for extended lifespan. This model is equipped with integrated safety mechanisms that prevent overheating and ensure reliable operation.

In contrast, the CMC1-50DV3N is designed for medium-sized applications, prioritizing both efficiency and cost-effectiveness. It includes automated controls to optimize energy usage while maintaining consistent temperature outputs. Its compact footprint makes it suitable for installations with space constraints, without compromising on heating performance.

The CMA3-50D36N model introduces enhanced energy management features, offering dynamic heating solutions. This model leverages advanced thermal technologies that aim to reduce energy consumption while maximizing heating output. Its versatile installation options allow users to adapt the unit to their specific space requirements seamlessly.

The CMC1-50D36N and CMC1-75D36N models are recognized for their adaptability across various applications. The CMC1-50D36N specifically caters to smaller heating needs, while the CMC1-75D36N serves larger spaces. Both units come equipped with user-friendly interfaces that simplify operation and adjustments, allowing for precise temperature control.

All models feature high-quality insulation and construction, helping to minimize heat loss and enhance system efficiency. They are designed with maintenance in mind, ensuring easier access to key components for service and repairs.

Through the incorporation of customizable settings, these models can suit the unique requirements of different environments, whether it be industrial facilities, commercial spaces, or residential buildings. With Thermo Products' commitment to innovation and quality, these heating solutions exemplify reliability, making them a solid choice for anyone in need of efficient heating technology.
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