Boilers Flashcards
What can cause damage to copper tin in heat exchanger.
Low or no Water
What is a low water cut off
Safety switch that will cut gas and extra heat in case of low water
What difference change does an operating control of hydronic boiler react to
Temperature Change.
how is the wiring done on an operating and safety control done steam boiler.
Series, series
What are the two types of low water cut-off.
-Flow Activated Switch
-Prob type low water cut-off switch
How do you test a low water cut-off
Drain the boiler.
Flow switch can have the paddle trimmed
What cause cavitation in centrifugal pump
Vapour to liquid causes flashing and damage equipment because of reduction in suction pressure
Who approve the conversion of appliance from propane to Natural Gas
The authority having jurisdiction.
How vent connector shall be installed
No dip or sag
Grade for vent
1/4 inch per foot
How to select the gauge for hydrostatic pressure
Calibrated
What differential does the operating control on hydrostatic boiler work on
Temperature change
The steam boiler operating control work on?
Pressure change
What happen to pressure when volume of gas is reduced.
Pressure increase
