Instruction manual

Instruction 0024-9396

Fyrite Pro Quick Reference Guide

Atmospheric Burner or

Gravity Vented Forced Air Hot Water Tank

5. Insert the probe into the flue-gas stream of the appliance being

tested as described below:

Forced Air Furnace – When testing atmospheric burner or grav-

ity vented, forced air heating equip ment with a clamshell or section-

al heat exchanger design, test each of the exhaust ports at the top

of the heat exchanger. The probe should be inserted back into each

of the exhaust ports to obtain a flue gas sample, before any dilution

air is mixed in.

Hot Water Tank – Domestic hot water tanks with the ‘bell’ shaped

draft diverter on top can be accurately tested by inserting the probe

tip directly into the top of the fire tube be low the diverter.

80% Efficiency Fan Assist or Power Vented – Combustion test-

ing of fan assist or power vented, furnaces/boilers should be done

through a hole drilled in the vent immediately above the inducer fan.

90% Efficiency Condensing – Condensing furnaces/boilers can be

tested through a hole drilled in the plastic vent pipe (when allowed by

the manufacturer or local authority of jurisdiction) or taken from the

exhaust termination.

Atmospheric or Gravity Vented Boiler – Boilers, which have a

‘bell’ shaped draft diverter directly on top, should be tested directly

below the diverter through a hole drilled in the vent connector.