Thermo Products GMC-85, OMC-70 service manual Yes

Page 37

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

Yes

Does system run until

No

Has the high limit thermostat

No

Check all wiring for

 

 

or auxiliary high limit

 

 

thermostat is satisfied?

 

 

 

 

loose connections.

 

 

thermostat activated?

 

 

 

 

 

 

 

 

Yes

 

 

 

Check for reduced airflow through

 

 

 

the furnace. This may be caused

 

Yes

 

by an excessively restrictive duct

 

 

system, an inadequate amount of

 

 

 

supply air,especially for furnaces

 

 

 

installed in closets, or extremely

 

 

 

dirty air filters. Also, check and

 

 

 

confirm heat input rate to unit is

 

 

 

within specifications.

 

Does burner shut off

No

Check for short in wire

 

when thermostat is

 

to thermostat. Replace

 

satisfied?

 

thermostat, if necessary.

 

Yes

 

 

 

 

 

Check fan timer settings

 

Does the circulating air

No

against those on connection

Yes

blower turn off after

diagram. Is fan selector

 

Replace fan timer.

thermostat is satisfied

 

switch set on "manual".

 

 

within 4 minutes?

 

Reset if necessary. Does

 

 

 

fan still fail to turn off?

 

Yes

Troubleshooting Complete.

36

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Contents GAS-FIRED or OIL-FIRED Furnace Do not RUN the OIL Pump DRY for More than Five Minutes Safety SectionPage Page Page Power Switch Table of Contents Section Beginning Page Models OMC/GMC OMC-70 GMC-85 III. Furnace Specifications ModelBlower Data Burner DataStandard Chimney IV. Installation Roof JackFurnace Location Page Base Installation Page Page Closet Installation Alcove InstallationCombustion AIR Page Page Fuel Piping Page Page Electrical Wiring AWG Page Wiring Diagram Burner Installation Burner Operation and Adjustment Page Burner Combustion Parameters Flue GAS Combustion AnalysisPage OMC/GMC Troubleshooting Flowchart If not, replace 1 TDR. On Module GMC or ignition transformer OMC Yes Does the burner stay Yes CAD Cell Checkout Procedure OMC only Heat Exchanger Cleaning Instructions Cleaning or Replacing Flue Pipes On Shut Down Extended ShutdownVI. User Information Section Inspection Areas Component LocationsFilter Location and Cleaning Appendix A. Replacement Parts List

GMC-85, OMC-70 specifications

Thermo Products has built a reputation for delivering top-notch heating and cooling solutions, and the GMC-85 and OMC-70 models are no exception. These high-efficiency gas furnaces are designed to meet the diverse needs of homeowners while prioritizing energy savings and comfort.

The GMC-85 model is known for its impressive efficiency ratings, operating at an AFUE (Annual Fuel Utilization Efficiency) of up to 85%. This means that a significant portion of the fuel consumed is converted into usable heat, making it an economically sensible option for heating your home. Additionally, it features a multi-speed blower motor, which allows for better air circulation and consistent heating throughout the living space. This model also includes a durable heat exchanger crafted from high-quality materials, ensuring longevity and reliability in performance.

On the other hand, the OMC-70 furnace offers a slightly lower AFUE rating of 70%, but it shines in certain areas such as cost-effectiveness and straightforward installation. Its reputation for reliability is bolstered by its rugged design and construction that can withstand the rigors of various climates. The OMC-70 also includes a standard efficiency motor, contributing to reduced energy consumption while delivering appropriate heating requirements for smaller spaces.

Both models utilize advanced technology aimed at improving user convenience and efficiency. Features such as electronic ignition systems enhance reliability by eliminating the need for a pilot light, while also providing a quick and efficient startup process. Furthermore, each unit can be easily integrated with smart thermostats, allowing homeowners to manage their heating needs remotely for optimized performance.

Noise reduction is another characteristic that sets these models apart. Both the GMC-85 and OMC-70 employ sound-dampening technologies to ensure quieter operation, providing a peaceful environment for families.

In summary, Thermo Products' GMC-85 and OMC-70 furnaces present excellent options for homeowners looking to achieve comfort and energy efficiency. With their durable construction, advanced technology, and features geared toward enhancing user experience, these models provide reliable heating solutions suitable for various needs and budgets. Investing in either of these products translates to improved energy savings and consistent warmth, making them popular choices in today's competitive market.