Monessen Hearth Direct Vent Gas Insert IDV490NVC - Manual (Page 15)

57D0016 15
VENT INSTALLATION
VENT CONFIGURATIONS
Recommended block-off
plate (non-combustible
metal). Prevents
odors from chimney
entering room.
Exhaust
Any cracks or
damage inside
chimney must
be repaired.
The block-off plate
(AI42AK43 or
AI31AK33) must
seal intake to the
chimney space so
that air is drawn
down chimney for
combustion air.
Block-off Plate
- (AI42AK43 or
AI31AK331)
non-combustible
materials
Inlet
Masonry
Fireplace
NOTE: You may use either reline configuration with a masonry or zero-clearance fireplace.
Exhaust
Inlet
Termination Kit
490 unit - part # AI42TK43A
380 unit - part #AI31TK33A
4" (100mm) or 3" (75mm)
Exhaust UL 1777 Gas Liner
3" (75mm) Inlet
Figure 8 - Inlet and Exhaust Reline Figure 9 - Exhaust Only Reline
UL-127,
Solid Fuel
Z.C. firebox