XLT XD-9010B - Manual (Page 27)

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Ventilation Requirements & Guidelines
Ventilation Requirements
Most gas burning appliances produce CO (carbon monoxide), a poison. CO and heat must
be vented to the outside. A powered ventilation hood is required to remove these. The hood and
HVAC installation must meet local building and mechanical codes. In Australia, a ventilation
hood should be installed in accordance with AS5601 Gas Installation. Requirements vary through-
out the country depending on the location by city. Proper ventilation is the oven owner’s responsi-
bility. The AVI Hood system is designed to meet all requirements on XLT ovens and it is our rec-
ommendation that this system be used.
Ventilation Guidelines
Ventilation Performance Test
After the oven and ventilation hood have been installed and are operating, a smoke candle
can be used to “see” if the heat and products of combustion are being properly exhausted. Smoke
candles can be purchased through HVAC contractors. The test procedure is outlined below.
 The oven must be operating at 450º-500ºF / 232º-260ºC.
 The conveyor must be turned off.
 The ventilation hood exhaust fan must be turned on.
 Put a smoke candle in a pan on the conveyor belt at the center of the oven.
 Observe the smoke pattern coming out of the oven.
The ventilation hood must capture all of the smoke from the oven. An air balance test can
help determine the proper amount of exhaust and make-up air flow rates.
Obtain information from the authority having jurisdiction to determine the requirements for
your installation. Your ventilation hood supplier and HVAC contractor should be contacted to
provide guidance. An air balance test is highly recommended, performed by a licensed contractor.
A properly engineered and installed ventilation hood and HVAC system will expedite approval,
reduce oven maintenance cost, and provide a more comfortable working environment.
Oven & Hood Interlock
An interlock system between the oven and hood is highly recommended and is required in
some jurisdictions. AVI hoods have this feature.