Gas Heat ESCO (part 3 of 4)

Any unit designed to be installed in different configurations is called

If a newer furnace shuts off before the rooms are warm

The diameter of the burner widens before gradually narrowing to increase velocity pressure and aid in gas/air mixture

What is the purpose of the gas regulator for a gas fired furnace

The furnace nameplate specifies a temp rise of 40F - 70F yet you read 80F rise, what should be done to correct it

On a modern furnace with an IFC, how is the blower cycled during a call for heat

A loud bang when the funace starts could indicate

In perfect combustion what percent of Co2 is present in flue gases

Constant speed, constant torque and constant airflow are all typs of

What switch must operate before ignition trial begins on a system with an induced draft motor

Whats the tool used to measure return airflow to a furnace

When using the 10 wrap method the reading is 5.5amps, what should the anticipator be set to

What is a redundant gas valve

The primary function of the high limit switch is to de-energize the

For heating the fan speed should be set by

Flashback is an indication of what

The serverity of an electric shock is determined by

What will occure if a technician comes into contact with voltage of a spark ignitor

Gas valve with 100% shut off means what

If the ignitor for an HSI sytem does not light after inducer start up, what is the proper action to check

What does natural gas primarily consist of

A job calls for the installation of t-stat wiring at 75ft, to avoid voltage drop what size is needed

What is the "bonnet capacity" of a furnace

Normal voltage for an HSI ignitor is

If you read zero ohms between the common and any speed on a motor, you determine the winding is

Any furnace installed above ____ ft needs to have an adjust made to operate properly

To test for an obstucted flue pipe what tool is used

For a DSI system the ignitor voltage is

If a furnace is "direct" ignition it

What condition would cause the temp safety switch to shut off the burners

The purpose of the burner crossovers is to

What is the most common burner used in the modern furnace

Typical manifold pressure for an LP furnace is