Product Overview

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MPO-IQ
Installation & Service Manual
A. GENERAL GUIDELINES
1. Direct Vent system must be installed in accordance
with these instructions and applicable provisions
of local building codes. Contact your local fire
and building officials on specific requirements for
restrictions and the installation of fuel oil burning
equipment. In addition, for boiler installation in United
States, consult with a professional knowledgeable
on requirements of NFPA 31- Standard for the
Installation of Oil-Burning Equipment and NFPA211-
Standard for Chimney, Fireplaces, Vents and
Solid Fuel-Burning Appliances, latest editions.
Installations in Canada must be reviewed with a
professional knowledgeable on requirements of CSA
B139 – Installation Code for Oil-Burning Equipment,
latest edition.
2. In the Direct Vent configuration, all air for combustion
is supplied directly to the burner from outdoors,
and, flue gases are vented directly outdoors (thru
wall), via Direct Vent System (FDVS), which is a non-
positive pressure vent system termination for oil-fired
appliances, that provides an outlet for products of
combustion, and, an intake for combustion air in a
single concentric terminal.
3. Direct Vent Hood Assembly minimum clearance to
combustible material is 0".
4. Maximum wall thickness that FDVS vent termination
may be installed through is 12".
Figure 16: Vent Terminal Location
5. Locate the vent terminal so vent pipe is short and
direct, and, at the place on exterior wall that complies
with the minimum distances as specified in Figure
16 and listed as follows. The vent termination must
be located (as measured to the bottom of vent
terminal):
a. Not less than 12" above finished grade or
expected snow accumulation line whichever is
greater.
b. Not less than 3 ft above any forced air inlet
located within 10 ft.
c. Not less than 1 ft from any door, window or gravity
air inlet.
d. Not less than 7 ft above grade when located
above public walkway.
e. Not less than 3 ft (as measured to side of vent
termination) from an inside corner of an L-shaped
structure.
5 Direct Venting / Air Intake Piping (Boiler Models MPO-IQ140E thru 231 ONLY)
WARNING
This venting system must be installed by a
qualified installer (an individual who has been
properly trained) or a licensed installer.
DO NOT locate vent termination where exposed
to prevailing wind. Moisture and ice may form
on surfaces around vent termination. To prevent
deterioration, surface must be in good repair
(sealed, painted etc.).
DO NOT locate vent termination where petroleum
distillates, CFC's, detergents, volatile vapors or
any other chemicals are present. Severe boiler
corrosion and failure will result.
DO NOT locate vent termination under a deck.
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