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Monessen Hearth BWBC400MHB User Manual

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Page of 40
61D0087 
9
A
7
1
/
2
"
6
1
/
2
"
6
1
/
2
"
34
3
/
8
"
1
/
2
" or 
5
/
8
"
Drywall Spacers
21
"
10
"
13
1
/
2
"
21
1
/
2
"
2
5
/
8
"
17
1
/
4
"
7
"
9
7
/
8
"
Gas
9
5
/
8
"
Air Kit
1
/
2
" or 
5
/
8
"
Drywall
Spacers
13
3
/
4
"
Electrical
21
3
/
4
"
Framing
Dimension 
40
3
/
4
"
Framing
Dimension 
C
Framing Dimension 
B
TOP VIEW 
FRONT VIEW 
SIDE VIEW 
BWBC400MHB
BWBC500MHB
Outside
Connector 
Center
Line 
FIREPLACE DIMENSIONS 
Figure 7 - Fireplace Dimensions 
 
 
400 
500
 
 
Units 
Units
  A 
24
3
/
4
" 
30
3
/
4
"
  B 
36" 
42"
  C 
40
1
/
2
" 
46
1
/
2
"
1.  Place fireplace in the desired location. Securely support and level fireplace. Check face of the fireplace with a carpenterʼs 
level. If fireplace is not plumb, correct it by placing shims under the edges of fireplace.
2.  Block in the fireplace to prevent any shifting of firebox. Secure fireplace with naildown straps located on each side of 
the fireplace. See Figure 1, Page 5.Do not enclose the fireplace until the combustion air duct and chimney pipes are 
installed.
3.  Connect fireplace fan assembly to homeʼs electrical system.
4.  Trim and enclose fireplace.
5.  Install hearth extension or equivalent. See pages 10 and 11. 
Note: Some local codes may require electrically grounding the fireplace and chimney.
FIREPLACE INSTALLATION