© The Fulton Companies 2016
3-20
OPERATION VTG-IOM-2016-1214 SECTION 3
Perform Test of Limit Controls
Fire the boiler and test the high limit control as follows:
1. Alter high temperature limit to a value lower than the anticipated loop
temperature. Turn the boiler on. Water temperature will rise until the
boiler locks out. This condition has to be manually reset.
2. Alter the high limit cut o temperature to normal level, typically 10-20
degrees above set point.
Perform Test of Low Gas Pressure Switch
Test the low gas pressure switch as follows:
1. With the boiler running turn down the low gas pressure switch until a lock
out is annunciated.
2. Reset the switch to normal level, re-start the boiler.
Perform Test of High Gas Pressure Switch
Test the high gas pressure switch as follows:
1. Close the downstream main gas cock and start the boiler.
2. Once the trial for ignition period is reached, the main gas valve will open,
pressurizing the line. This will trip the high gas pressure switch.
3. Manually reset the high gas pressure switch after it trips.
General Operation of the Boiler
Excessive cycling will reduce the useful life of any piece of mechanical
equipment. Vantage boilers should be operated and controlled so the boiler
cycles less than 12,000 times per year. Vantage boilers should be operated and
controlled so that the temperature dierential across the boiler does not exceed
100°F (38°C).
! WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional/professional codes and
regulations.
To Next Page
Loading...
