Perform fuel / air linkage adjustments Flashcards
What is the power end of the Honeywell, Series 90 Modutrol used for?
It is used to drive linkages
What is the auxiliary end of the Honeywell, Series 90 Modutrol used for?
It is used to devices like auxiliary switches
In what orientation should motors with crankshafts be installed?
Horizontal
How is strain avoided on the motor and linkage of a fuel/air system?
The drive lever rotational start point is kept off of the shaft centerline
Fixed Stroke Actuators are available in what two opening ranges?
90⁰ or 160⁰
Adjustable stroke model actuators can be field adjusted between what range?
90⁰ - 160⁰
What controls the speed and the amount of rotation of the driven lever pivot point?
It is controlled by the starting position of both levers and the connection distance of the linkage to the lever pivot points
Placing the drive lever closer to the shaft centerline than the driven lever is placed will do what to the rotation of the driven lever?
It will be reduced
Placing the driven lever closer to the shaft centerline than the driver lever is placed will do what to the rotation of the driven lever?
It will be increased
How are precise changes made on the linkage for a fuel valve?
By adjusting the cam spring
The gas butterfly valve is used to control modulation and to stop gas flow?
TRUE / FALSE
FALSE - it is not used to stop the gas
How can high and low fire be adjusted on a gas butterfly valve?
By using the stop screws
Where would you find information for making initial set up adjustments to linkages?
From the equipment manufacturer
What must be done while making any adjustments to linkages?
Combustion analysis must be performed
How do we balance safety and efficiency when adjusting our linkages with the use of a combustion analyzer?
- Adding more oxygen reduces the chance of CO and increases safety.
- Reducing oxygen increases our efficiency but has the potential to increase CO thus being less safe.
- Always prioritize safety.
