U.S. Boiler Company K2, Installation Instructions Manual

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105294-05 - 5/15
To convert this boiler for use on LP gas, perform the following steps:
1) If not already done, install the boiler in accordance with this manual, following all instructions in Section XI (Start-up
and Check-out) up to Step 10.
2) Before attempting to start the boiler turn the throttle (Figure A.1) clockwise until it stops (several full turns).
3) Turn throttle counter-clockwise the exact number of turns shown in Table A.2.
4) Attempt to start the boiler using the lighting instructions located on Page 97. If the boiler does not light on the first try
for ignition, allow to boiler to make at least four more attempts to light. If boiler still does not light, turn the throttle
counter-clockwise in 1/8 turn increments, allowing the boiler to make at least four tries for ignition at each setting, until
the boiler lights.
5) After the burner lights, force the burner to high fire by entering the Adjust Menu and then High Fire Hold as described in
Section XI (Start-up and Checkout). Allow the boiler to operate for approximately 5 minutes before taking combustion
readings. Note: after 10 minutes, the boiler is automatically released from high fire hold.
DangEr
These instructions include a procedure for adjusting the air-fuel mixture on this boiler. This procedure
requires a combustion analyzer to measure the CO2 (or Oxygen) and Carbon Monoxide (CO) levels in flue
gas. Adjusting the air-fuel mixture without a proper combustion analyzer could result in unreliable boiler
operation, personal injury, or death due to carbon monoxide poisoning.
Warning
This conversion kit shall be installed by a qualified service agency in accordance with the manufacturer’s
instructions and all applicable codes and requirements of the authority having jurisdiction. If the
information in these instructions is not followed exactly, a fire, an explosion or production of carbon
monoxide may result causing property damage, personal injury, or loss of life. The qualified service
agency is responsible for proper installation of this kit. The installation is not proper and complete until the
operation of the converted appliance is checked as specified in the manufacturer’s instructions supplied
with the kit.
Warning
The pressure regulator has been factory set using precision instruments and must never be adjusted
in the field. The gas valve outlet pressure is the same for both natural gas and propane. Make sure that
all adjustments are made with the throttle, not the pressure regulator. attempting to adjust the pressure
regulator will result in damage to the gas valve and may cause property damage, personal injury or loss of
life.
Warning
The throttle adjustments shown in Table A.2 are approximate. The final throttle setting must be found using
a combustion analyzer. Leaving the boiler in operation with a CO level in excess of the value shown in Table
3 could result in injury or death from carbon monoxide poisoning.
Appendix A: Instructions for Conversion of this Boiler for use with LP Gas