85-03-01205
ML-SERIES FIREPLACE
Page
83
6.4
OVER FIRING OR UNDER FIRING OF BURNER
NEVER "over fire"
or “under
-
fire”
units by increasing or decreasing the main orifice sizes or by adjusting gas pressure to increase
BTUH above nameplate specifications.
O ve r fir ing c an c ause pe r mane nt damage to fir e box and de te r ior ation of par ts and void the war r anty.
Under-firing can potentially cause delayed ignition and lead to property loss and person injury and will void the warranty.
If you ar e using a “bac kyar d” Natur al Gas we ll as the gas sour c e , you must submit for mal gas analysis
data
she e ts to Me ndota Fir e plac e s for r e vie w and c alc ulation of pr ope r main bur ne r or ific e size s pr ior to fir st
fir ing
. It is known that unpur ifie d Natur al Gas fr om “bac kyar d” we lls c an c ontain high e ne r gy le ve ls c ausing
ove r fir ing. Fur the r , unpur ifie d ga s c an c ontain high le ve ls of Sulphur and othe r c ompounds whic h c an
damage the bur ne r mate r ials and the c e r amic glass. Use of unpur ifie d gas will void the war r anty for this
pr oduc t.
6.5
BURNER FLAME HEIGHTS REFERENCE DIAGRAM
Figure 6-2 Burner Flame Heights:
This image provides a visual reference for the burner flames burning at maximum height
after the burners have been operating for 30 minutes or longer . This, however, is dependent on the gas type, air shutter
opening setting and vent system configuration. Actual flame heights can be slightly higher or lower when compared to this
reference image.
