Process 8 – Recirculation Ductwork Installation
e) Beginning on either side of the transition duct begin to install the recirculation ductwork against the side wall of the oven – Reference Drawing Packet for item selection . > Reference Figure 19 > Note that there is a protruding slip edge on one end of the recirculation ductwork, this slide edge must go towards the direct of airflow (to the fan) and will be OUTSIDE of the ductwork connection . > Failure to ensure the edge is outside of the ductwork will result in air escaping the ductwork along the wall and possibly penetrating the panel seams causing leakage . f) Cut and attach pieces of T-7 trim where needed on each section of ductwork - Reference Drawing Packet for details . Step 3 - Installation of Recirculation Ductwork – Double Entry Ovens Reference Figure 20 Skip Step if Floor Mounted Heater Box . a) Install the overhead transition ductwork under the heater box . > Cut T-7 trim angles to fit the discharge duct dimensions . > Use this trim to attach the transition duct to the discharge duct as well as the oven roof . b) Securely fasten the top of the transition duct to the roof using the angle brackets – Reference Drawing Packet for details . c) Beginning on either side of the transition duct begin attaching the transfer duct work vertically down the wall . > The transfer ductwork may not be against the wall but temporarily hanging from the transition duct . d) Beginning on either side of the transfer duct begin to install the recirculation ductwork against the side wall of the oven – Reference Drawing Packet for item selection . > Note that there is a protruding slip edge on one end of the recirculation ductwork, this slip edge must go towards the direct of airflow (to the fan) and will be OUTSIDE of the ductwork connection . > Failure to ensure the edge is outside of the ductwork will result in air escaping the ductwork along the wall and possibly penetrating the panel seams causing leakage . e) Cut and attach pieces of T-7 trim where needed on each section of ductwork - Reference Drawing Packet for details .
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