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Innovative Hearth Products
MHD 35/40 Series Direct-Vent Gas Fireplaces
Determining Vent Setup in the Combination Venting Unit
4.
Combination venting units are shipped with rear venting setup nearly ready for install. If this is the type of vent you require, remove
all insulation packing and flue plug block off from rear venting and proceed with fireplace installation. If you require a top-vented
unit, use the following steps to convert the fireplace before use. Note: Once the fireplace is set, remove the shipping standoff by
removing the seven (7) screws and discard the shipping standoff.
Outside preparation of the fireplace for top-vent conversion
Step 1: Remove the two (2) screws
holding the top vent cover plate and
gasket.
Step 4: Make sure insulation disc is
still in the round cover. Remove the
flue plug from the top flue.
Installing Metal, Non-Combustible Front Standoff for 40" Models Only
5.
A non-combustible standoff is provided with the fireplace to prevent overlap of drywall or other material of portions of the fireplace
that may be prone to the buildup of heat. Standoff arrives on the lower front of the unit.
Use raised locating dimples
to position front standoff.
Step 2: Secure all three of the screws to the up-right posi-
tioned heat shield - one (1) at both ends and one (1) in the
center.
Step 2: Remove the round flue
cover from the top venting outlet.
Step 5: Bend tabs out on round flue cover. Secure the round flue cover (provided) to
the wrapper over the rear venting outlet. Use two (2) 3/4" long sheet metal screws
Step 1: Carefully bend up the two (2) tabs on the heat shield at a 90° angle from each opposite
joint and then the foot of the Standoff at approximately a 45° angle.
Step 3: Remove insulation from inside
flue pipe.
Step 3: Top of front standoff
should be flush with top
standoffs.
Installation
900414-00 12/2015
Step 4: Standoff should be
flush with front of unit.
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