Specifications

Instruction 24-9388
15
Fyrite Pro
4.2 Performing a Combustion Test
4.2.1 Analyzer Turn On and Warm Up
Important: The probe must be at room temperature before
performing the following steps.
1. Connect the probe, and if used, the combustion-air thermocouple to
the bottom of the analyzer per Section 3.3.
2. Before turning ON the analyzer, position the probe or the optional
combustion-air thermocouple to measure the temperature of the
burner’s combustion air by performing one of the following:
• When NOT USING the Combustion-Air Thermocouple –
Before turning ON the analyzer, its probe must be located in the
area containing the burner’s combustion-air supply. If the burner
is using room air, then simply place the probe within the room.
In the case of a high-efficiency furnace where combustion air is
drawn in from an outside source, insert the probe into the com-
bustion-air stream so it can measure its temperature with the
burner operating.
• When USING the Combustion-Air Thermocouple –
The analyzer’s second thermocouple channel can be used to inde-
pendently monitor the temperature of the burner’s combustion-
air supply while testing. When using this second thermocouple
channel, insert the thermocouple into the burner’s combustion-air
stream, and position the probe to measure the ambient room
temperature.
3. Turn ON the analyzer and allow it to warm up per Section 4.1.1.
4.2.2 Selecting a Fuel
1. With Fuel Screen displayed, press either the  or  button to step
through the fuels codes until the proper fuel is selected. The ana-
lyzer defaults to the most recently selected fuel.
F1 = Natural Gas
F2 = Propane
F3 = Light Oil
F4 = City Gas
2. Press the ENTER button to select the displayed fuel code and enter
the Run Mode.