Mendota ML39 Assembly, Installation And Operating Instructions page 33

Venting
The ML39 Fireplace must be vented to the outside and must use one of the approved coaxial rigid ducting
systems or a coaxial flexible ducting system .
gasket cements may be used at pipe joints but is not required
The ML39 Fireplaces requires coaxial rigid- 5" diameter exhaust & 8" diameter air inlet and approved vent caps for most
installations. In some special cases, flexible ducting may be used. Contact Mendota Technical Service Department if your
installation requires other than standard rigid 5" X 8" Coaxial venting components.
All UL Listed Coaxial Rigid 5"X8" Vent pipe components and vent caps are approved for use. Do not mix components of different
brands or series. Always use the same brand and series components throughout the entire vent system.
All warranties will be voided and serious fire, health or other safety hazards may result from any of the
following actions: Installation by unauthorized p ersonnel; installation of any damaged component;
unauthorized modification of vent system; installation of any components not approved by Mendota; failure
to meet all clearance requirements; failure to properly twist -lock and positively seal all components .
Consult local building codes before beginning the instal lation.
WARNING: Always maintain required clearances (air spaces) to combustibles to prevent a fire hazard. Do
not fill air spaces with insulation. Check installation instructions for minimum cle arance requirements
between the outer walls of the vent pip e and nearby combustible surfaces. Be sure to check the vent
termination clearance requirements from decks, windows, soffit, gas regulators, air supply inlets, and public
walkways, as specified in these installation instructions and local building codes.
SAFETY PRECAUTIONS FOR THE INSTALLER: 1) Wear gloves and safety glasses for protection; 2) Exercise extreme caution when
using ladders or on rooftops; and 3) be aware of electrical wiring locations in walls and ceilings.
This gas appliance and vent system must be vented directly to the outside of the building, and never
attached to a chimney serving another solid fuel or gas burning appliance. Each direct vent gas appliance
must have its own s eparate vent system. Common vent systems are prohib ited.
To assure proper venting performance of this high -performance
Mendota Direct Vent Fireplace, it is critical that all brands of vent pipe
sections are sealed tightly and leak -proof. This means that all pipe
sections must be carefully rotated into the fully "twist-locked" position.
We strongly recommend that fixed length pipe sections be used in place of telescoping
sections whenever possible.
COMPONENT "TWIST-LOCK" CONNECTION PROCEDURE
DuraVent and American Metals pipe and fittings are designed with special twist-lock
connections. Twist-lock procedure is as
follows: four (4) indentations, located on the female ends of pipes and fittings are
designed to slide straight in to the male ends of the adjacent pipes and fittings, by
orienting the four pipe indentations so that they match and slide into the four entry
slots on the male ends.
Push the pipe sections completely together then twist-lock one section
clockwise, approximately ¼ turn until the two sections are fully locked. The
female locking lugs will not be visible from the outside on the black pipe or
fittings. They may be located by examining inside of the female ends.
Wall Heat Shield for Horizontal Vent Caps
Always use heat shield (#AA-11-00458) when the exterior wall covering is
made of vinyl, wood or other combustible materials. Heat shield (#AA-11-
00458) or an equivalent heat shield shall be installed. Heat shield (#AA-11-
00458) is available for order directly from Mendota fireplaces.
85-03-01136
Do Not Use any silicone sealants at pipe joints. Stove
ML39
.
HEAT SHIELD #AA-11-00458
Page 33