62D4037
16
OUTSIDE COMBUSTION AIR PRECAUTIONS and RECOMMENDATIONS
NOTE: The use of outside air for combus-
tion is optional unless required by build-
ing codes. It is only necessary to supply
outside combustion air to one side of fire-
place. Use model OAC4 combustion air kit
(refer to Page 17).
1. Avoid extremely long runs and numer-
ous turns in duct leading from fireplace
to combustion air assembly. These condi-
tions increase the resistance to free flow
of air through duct.
Figures 11 and 12
2. Locate combustion air assembly at an
exterior location. Make sure the location
cannot be accidentally blocked. Locate
assembly above snow line to prevent
snow from blocking assembly.
3. Never mount combustion air inlet assem-
bly in garage or storage area where com-
bustible fumes (gasoline) might be drawn
into fireplace.
4. Combustion air may be drawn from crawl
space under house when adequate sup-
ply of air is provided by open ventilation.
Figure 11
NOTE: Never take combustion air from at-
tic space or garage space.
NOTE: Install outside combustion air
ONLY ON LEFT-HAND SIDE of fireplace.
������
�����������
�����
Duct Extend-
ed to Miss
Joist
To Outside
Wall
FP2021
Figure 11 -
Install Unit Above Basement or Crawl Space
������
���������
�����
Inlet Grille
in Soffit
(Overhang)
8” Maximum
Figure 12 -
Install Unit on Concrete Slab with Optional Outside Air Runs
FP2022
Summary of Contents for 400BBV
Page 30: ...62D4037 30 ILLUSTRATED PARTS LIST FIREBOX COMPONENTS 4a 4b 4c 1 2 3 5 6 7...
Page 34: ...62D4037 34 ILLUSTRATED PARTS LIST ELECTRONIC IGNITION 1 2 3 4 5 6 7 9 8 10 11 12...
Page 41: ...62D4037 41 NOTES...
Page 42: ...62D4037 42 NOTES...
Page 44: ...MHSC 149 Cleveland Drive Paris Kentucky 40361 www mhsc com OCTOBER 2008 62D4037 Rev 10...
