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GT INSTALLATION AND OPERATION INSTRUCTIONS Page 29
BOILER SET UP
NOTE: Before starting the boiler, turn off the
electrical supply going to it. Make sure that gas is
available at the gas valve inlet. Open the valves in
the hot water return and supply piping. Failure to
take these precautions will prevent the boiler from
operation properly.
Fill the boiler and all of the radiation with water. Make
sure that the system is completely purged of air, see
GENERAL PLUMBING GUIDELINES.
Review these instructions and make sure that the boiler
installation complies with ALL of the instructions up to
this point.
OPERATING INSTRUCTIONS
The GT boiler employs a pneumatic modulation system.
This modulation system increases or decreases the
speed of the blower to meet the heating demand. The
gas valve pressure regulator senses the air pressure and
adjusts the gas fl ow to ensure correct combustion.
WARNING: Before operating read and under-
stand the instructions contained in this manual.
Do not attempt to operate this boiler if it has
not been installed in accordance with the
guidelines set forth in this manual. Read and
fully understand the operating instructions in
the “For Your Safety Read Before Operating”
section of this manual. Failure to comply with
this WARNING could result in a fi re or explosion
causing severe personal injury or death!
Should overheating occur or the gas supply fail to shut
off, do not turn off or disconnect the electrical supply to
the pump. Instead, shut off the gas supply at a location
external to the appliance.
Do not use this appliance if any part has been under
water. Immediately call a qualified service technician
to inspect the appliance and to replace any part of the
control system and any gas control that has been under
water.
NOTE: The GT was tested with Natural Gas having a
heating value of 1020 BTU per cubic foot. For areas
with lower heating values, a combustion test is
required to obtain optimum operation.
WARNING: The input Screw MUST NEVER BE
ADJUSTED without verifying proper combustion
with a calibrated combustion analyzer. Failure to
comply with this warning can result in excessive
levels of carbon monoxide which can cause
severe personal injury or death!
Table 7 contains the range for the CO, CO2 and NOx that
should be in a fl ue gas sample of a properly operating
boiler at maximum input.
Table 7 - Normal Flue Gas Composition
Natural Gas Propane
Carbon Dioxide CO2 % 8-9.5 9-10.5
Carbon Monoxide CO ppm 25-175 25-175
NOX ppm 10-50 10-50
Note: At maximum fan speed of 240 on the Sentry
display