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INSTALLATION INSTRUCTIONS

CAUTION:

Each installation must conform to all local, state and national codes. Refer to the national fuel gas code and local zoning and code authorities

for details on installation requirements. The Mendota Inserts must be vented to the outside in accordance with the latest edition of the National Fuel Gas
Code. In the absence of local codes, the installation must conform with National Fuel Gas Code ANSI Z223.1 (NFPA 54), or Canadian Code CAN1-B149
or most current edition, also known as NFPA 54. Do not connect this Insert to a chimney flue serving a separate solid fuel or gas-burning appliance.

1. Remove glass doors, metal fire screens, etc. from existing fireplace. Be sure there is 12" minimum

distance from top of upper grill to bottom of mantel; see Specifications (Pg.4 & 5), and a 16" mini-

mum non-combustible hearth extension in front of the glass surface if a raised hearth is not sup-

plied. (See pg. 10 for "Raised Hearth").

2. Remove any additional framework or other obstructions in the existing fireplace opening and burn-

ing area. Also remove any chimney cap from top of chimney so that vent liner can be installed

freely.

3. Before Insert is installed, have gas supplier or contractor run gas line to the existing fireplace. Be

sure gas plumbing instructions [see Pg. 11 & 12

are carefully followed. Gas supply may enter fire-

place on either side or back of fireplace, whichever is most convenient and accessible. Electrical

service (120 volt) should also be supplied [See electrical requirements on Pg. 3 and blower instruc-

tions on Pg

26].

4. The entire chimney should be swept to remove creosote, soot and any obstructions (bird nests,

etc.).

5. Open fireplace damper. If damper opening is large enough to accept the 4" and 3" flue liners,

permanently secure damper in "open" position.

NOTE:

Massachusetts requires that the flue dam-

per must be removed or permanently welded in the "open" position.

6. If damper opening is too small for the 4" & 3" flue liners, it will be necessary to remove the damper

handle and the damper plate. Some damper plates are held in place by a pinned hinge that can be

released easily by tapping out the pin with a hammer and punch. Others may be held in place by a
screw or bolt, or pivots may be cast into the damper housing. The latter types may be harder to

get out and may require sawing or breaking out. [NOTE: if flue size is 6" (127 mm) or less, or if

severe offsets occur, or a significant mortar slop is evident between the liners, try to snake liner

down the chimney to the top of the damper housing before breaking out damper plate and hous-

ing.]

CAUTION: If the 4" & 3" flue liners cannot be installed in an extremely tight chimney DO NOT pro-

ceed with installation.

7. If damper opening is narrower than 4-1/2" to 5" (114 mm to 127 mm) and if local code authorities

allow, loosen and remove mortar behind back side of damper housing in the center of the opening

enough to get the gripping teeth of a pipe wrench over the flange of the damper housing (for cast

iron housings). Tighten the wrench snugly, and kick down on the wrench handle to break out a
half moon shaped piece of the damper housing, enough to easily fit the flex liner through it. If the

opening is wide enough, the break out is not necessary.

Install Insert only in chimney heights of 12' (minimum) to 35' (maximum) -- as meas-

ured in step 9 below.

Measure the chimney height from the top of the chimney (or the existing flue liner) to a point 24"

(610 mm) above the floor of the fireplace hearth. It may be necessary to drop a rope and measure

the rope itself. Be sure to allow for all offsets in existing chimney. Cut the 4" and 3”diameter flex

liner (s) to this measured length.