D
Du
ua
all F
Fu
ue
ell R
Ra
an
ng
ge
e
Operation Information
3-6
Types of Burners:
Blue Flame Burners
All Wolf open surface burners, including the French Top burners are blue flame burners. With this type of burner,
primary air is mixed with the fuel gas before the gas reaches the burner ports. An orifice is used to regulate gas
flow to the burner and is sized to draw exact amount of air into the burner body. Air, which is mixed with the gas
inside the burner body then exits the burner ports located in the burner head, where it is ignited. Secondary air is air
from around the flames. The flame produced has several zones, each represents a stage in burning of the gas.
The burner tip has a thin dark blue cone called the inner or primary cone. A lighter cone called the outer cone, sur-
rounds the inner cone. Air around the flame diffuses into the flame to burn at the outer cone. If conditions are per-
fect, products from the inner cone burn here. The final products of burning are carbon dioxide and water vapor. An
outer mantle surrounds the outer cone where burning is usually completed. It is nearly invisible and glows only
because of the high temperature of the final combustion.
Infrared Burners
Wolf dual fuel ranges also use infrared burners. The under-fired application for the charbroiler and the griddle uses
a porous refractory ceramic tile burner. (See Figure 3-2) With this type of burner, a substantial amount of energy
output is in the form of infrared radiant energy. With infrared heat, thermal energy is transmitted through space with-
out heating the medium through which it travels. Infrared energy is usually not affected by air flowing between the
burners and heated surfaces because of the burner’s numerous and tiny flames. This type of heat is very efficient
and compact. The under-fired refractory infrared burner requires 100 percent primary air and is designed to have a
hot glowing burner surface. The flame burns close to the burner surface at a high temperature.
NOTE:
There is no shutter on infrared burners for adjusting the primary air and there is no change in orifice size for
different altitude.
Figure 3-2. Infrared Burner
CHARBROILER AND GRIDDLE ORIFICE
GAS ORIFICE
ELBOW
Summary of Contents for DF304
Page 2: ......
Page 12: ...D Du ua al l F Fu ue el l R Ra an ng ge e General Information 1 10 ...
Page 62: ...4 22 Component Access Removal D Du ua al l F Fu ue el l R Ra an ng ge e ...
Page 77: ...Technical Data D Du ua al l F Fu ue el l R Ra an ng ge e 6 1 SECTION 6 TECHNICAL DATA ...
Page 81: ...Wiring Diagrams D Du ua al l F Fu ue el l R Ra an ng ge es s 7 1 WIRING DIAGRAMS SECTIO N 7 ...
