U.S. Boiler Company K2 FT User'S Information Manual Download Page 4

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A. General

1.  This manual covers

 the proper care and use of 

your Condensing High Efficiency Gas Fired Boiler.

2.  Instructions to safely operate

 and shut down 

this boiler are shown in Figure 1 on page 6, as well 

as on a label affixed to the boiler.

3.  This boiler

 uses an electronic means built into 

the ignition system to extinguish the burner in the 

event that flames exit the combustion chamber. If 

the boiler fails to fire, call a qualified gas service 

technician to diagnose and correct the problem.

4.  This boiler is

 equipped with a safety feature which 

will shut down the burner in the event that there 

is a blockage in the vent system. In the event that 

the boiler fails to function, and the boiler is vented 

through an outside wall accessible from the ground, 

inspect the vent terminal on the outside wall for a 

blockage such as a bee’s nest or ice. If a blockage 

is found, the burner should ignite approximately 

30 seconds after the blockage is removed. If no 

blockage is found, or if the terminal is inaccessible 

from the ground, the problem must be diagnosed 

and corrected by a qualified gas service technician. 

 WARNING

Asphyxiation  Hazard.    In  the  event  that  the 

ignition system on this boiler does not permit 

the boiler to fire, there is either a problem with 

the ignition system or a problem with the vent 

system. Call a qualified gas service technician 

to diagnose and correct the problem.
A shutdown of the burner due to the pressure 

switch is an indication that there is a problem 

with the vent system, such as a blockage. The 

boiler pressure switch should only be reset 

after a qualified gas service technician has 

diagnosed and corrected the venting problem 

that caused the pressure switch to open.   

B. Maintenance

1.  On a continuous basis:

•  Keep the area around the boiler free from 

combustible materials, gasoline, and other 

flammable vapors and liquids.  

•  Keep the area around the combustion air inlet 

terminal and the area around the boiler free 

from contaminants, including all sources of 

hydrocarbons such as bleaches, fabric softeners, 

chemicals, sprays, cleaners, paint, paints, paint 

removers, refrigerants, and cat boxes.  Traces of 

these chemicals can be drawing into the boiler, 

causing severe corrosion damage to the boiler 

and/or objectionable odors.

•  Keep the boiler room ventilation openings open 

and unobstructed.

•  Do not expose the boiler to large amounts of dust 

such as that generated by drywall construction or 

woodworking.

2.  On a monthly basis: 

 

 WARNING

If any of the below listed conditions is found, 

follow instructions “TO TURN OFF GAS TO 

APPLIANCE” in Figure 1 and contact a qualified 

gas service technician to correct the problem 

before placing the boiler back in service.  Failure 

to correct these conditions could result in 

property damage, personal injury or loss of life.

•  Inspect vent and combustion air intake terminals 

for obstruction or damage due to impact or 

excessive temperature.

•  Inspect vent and combustion air exterior wall 

penetrations to be sure they are weather tight.

•  Inspect the vent and combustion air intake 

system for obstructions, loose joints, condensate 

leakage, sags in horizontal runs of pipe, 

corrosion, or other deterioration.    

•  Inspect water and gas lines for leaks.
•  Remove boiler front door and inspect for carbon 

(soot) in the cabinet, condensate drain leaks or 

blockage, or deterioration of the visible controls, 

wiring, or sheet metal components. If any of 

these are found, have a qualified gas service 

technician service the boiler immediately.

•  Inspect flame for true yellow tipping.  Adjust 

thermostat to highest setting to turn on boiler and 

view flames through observation glass with front 

door removed.  On high fire the flame should be 

stable and mostly blue.  No true yellow tipping 

should be present, however intermittent flecks of 

yellow and orange in the flame caused by dust in 

air are normal.  See Figure 2.  If the burner flame 

looks satisfactory, adjust thermostat to normal 

setting and reinstall boiler front door.  If yellow 

tipping is observed, have a qualified gas service 

technician service the boiler immediately.

3.  On an annual basis:

 have a qualified gas service 

technician perform a more detailed inspection 

of the burner, heat exchanger, controls, and vent 

system and provide maintenance as specified in the 

Installation, Operating, and Service Instructions.  

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