Vent Restrictor; Vent Installation - Travis Industries DVL GSR2 NB Owner's Manual

Installation (for qualified installers only)

Vent Restrictor

WARNING: Restrictor adjustment should only be done by a qualified installer.
Only those installations determined to be over-drafting require this adjustment. The best indication of over-
drafting is a hyper-active flame pattern (flames that move too quickly). If the air shutter is constricted, the
flames become short and yellow, yet still very active. Over-drafting may affect the pilot, but this is not the
best way to determine over-drafting. Over-drafting is most likely in tall venting configurations. Do not over-
restrict the vent (this leads to ghosting or lifting flames - reduce restrictor setting).
The restrictor is adjusted with the face removed. Start with the restrictor in position number 1. Monitor
the flame for 5 minutes before adjusting. Move the restrictor a maximum two positions at a time by lifting
the adjustment plate and moving it until the correct notch falls into the slot on the adjustment bracket (use
a glove if the heater is hot - see illustration below). Monitor the flame for 5 minutes to determine correct
restrictor position and repeat restrictor adjustment if necessary.
Restrictor in Position #1

Vent Installation

Secure the vent to the fireplace insert and termination kit using screws.
Inlet (3" 76mm)
Exhaust (4" 102mm)
© Travis Industries
Restrictor positions:
1 2 3
Moving the Restrictor
3" (76mm) dia.
4" (102mm) dia.
Approved
Cap
Exhaust
4140813
4 5
Restrictor in Position #3
Additional Coaxial
Sections May Be Added
(support as needed)
Inlet
15
Inlet Exhaust
100-01294