ENERGY KINETICS EK1C, Installation & Service Manual

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Accel CS Boiler - Gas Heat - Eighth Edition – January, 2015 29
EK1C/EK2C gas valve with venturi
CONVERTING FROM ONE GAS TO ANOTHER
WARNING
The 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 the 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.
The Accel CS boiler’s gas burner is factory set for using either natural gas or LPG. A conversion kit with detailed
instructions can be purchased from Energy Kinetics if necessary to convert from one gas to another. The kit includes the
orifice required to convert from natural gas to LPG, plus the proper labels and tags to show that the gas valve has been
converted from natural gas to LPG or to show that the gas valve has been converted from LPG to natural gas.
DANGER:
Double check that the gas you are using matches the gas listed on the tags on the gas valve and boiler.
Refer to the detailed gas valve adjustment procedure given under the section ‘Gas Valve Setup Procedure’, shown
deeper in this manual.
The burner is set at the factory for an oxygen (O2) flue gas reading of 4.0% to 5.0%, with a target of 4.5% O2. If upon
initial startup a reading is taken that is outside of this range, and cannot be adjusted to within this range, then replace the
valve.
After converting from one gas to another, a combustion test using a combustion analyzer must be performed. If the O2
flue gas reading is within the range of 4.0% to 5.0%, the gas mixture can be adjusted to reach the target of 4.5% O2 by
turning the throttle valve screw. Carbon monoxide (CO) must be below 400 ppm air free.
GAS VALVE DESCRIPTION
Accel CS boilers are shipped from the factory preset
for their maximum firing rate. The Boiler will modulate its
firing rate from low to high firing rate as needed to
maintain the supply temperature setting during a heat
call.
The Honeywell gas valve allows for a preset ratio of
air/fuel gas (premix) throughout the range of input air
pressure supplied by the speed (RPM) modulated
system fan. It can utilize either of two gas types, i.e.
natural gas and LPG. However, it must be set properly
for use of either of these two specific gas types. Check
the tag on the valve to see which type it is set for before
connecting up to a gas source.
The valves first have an electric on/off direct operator
for opening the safety valve (class B according to
EN161) and a second electric on/off servo operator of
class B or C to EN161.
The pressure regulator is in accordance with class B
requirements of EN88.