Archgard 3400-DVTR20N-2 - Manual (Page 14)

Northfire 3400
14
INSTALLATION INSTRUCTIONS Cont... VENTING INSTRUCTIONS Cont...
RESTRICTOR PLACEMENT “FOR ABOVE 4 FOOT VERTICAL RISE VENTED
APPLICATIONS ONLY”
Vertical Venting between Four Feet (4’) and Thirty Feet (30’) re-
quires Restrictor Number 1 as per the Venting Chart on page 12.
Simpson Duravent Archgard System
Archgard System
In the Archgard system the restrictors are placed on the exhaust outlet on the appliance.
Simpson Duravent
With Simpson Duravent locate the restrictor in the exhaust section fitting into the formed lip.
WARNING: These restrictors are only to be installed in the vent system if the vent exceeds 4’
in vertical height. *See below which restrictor is required. Installing them
under any other circumstances may cause hazardous venting conditions
and may result in personal injury, property damage or death.
NOTE: Vent restrictors are designed to reduce vertical stack action for above 4 feet (4’), which will reduce the
velocity of incoming combustion air and not adversely affect the standing pilot or the flame of the appli-
ance.
Vertical Venting between Thirty Feet (30’) and up to a maximum
Forty Feet (40’) requires Restrictor Number 2 as per the Venting
Chart on page 12.
Restrictor Placement
40%
60%