Product Overview

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103859-12 - 8/19
MPO-IQ
Installation & Service Manual
C. INSTALLATION OF VENT HOOD TEE
1. Assemble the vent hood tee body to the vent hood
outer pipe, and, rotate the tee, so air intake inlet
collar is in the desired position. See Figure 19.
2. Attach the vent hood tee body to the vent hood outer
pipe with at least tree sheet metal screws (installer
provided).
Note: The tee may be rotated into any position so that
the collar is in a convenient orientation.
3. After completing assembly of the flexible double
wall insulated vent pipe to the vent termination
inner pipe (see Figure 20 and the following Steps),
apply the supplied high temperature sealant to seal
around the inner pipe protrusion thru the vent tee
cover pan, around the joint between the vent tee
collar and the vent tee body, and, seal or tape the
joint between the vent termination outer pipe and
the vent tee body.
D. INSTALLING THE FLEX OIL VENT PIPE FROM THE
VENT TERMINATION TO THE BOILER FLUE OUTLET
1. The venting system (vent pipe and all connectors)
shall be installed in accordance with the applicable
provisions of any local codes, and, in United
States, 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. For
installations in Canada, follow requirements of CSA
B139 – Installation Code for Oil-Burning Equipment,
latest edition.
2. A vent pipe connector, designed for positive pressure
venting, shall be supported for the design and
weight of material employed, to maintain clearances,
prevent physical damage and separation of joints.
All joints MUST BE sealed, for positive vent pressure,
to prevent flue gas leakage into the structure.
3. Support the vent pipe at intervals no greater than
three (3) feet apart using perforated metal strap or
other non-combustible supports.
4. Allow sealant to cure at least one hour before firing
boiler.
5. Route the vent pipe from the vent termination to the
boiler using the minimum number of bends possible.
The last horizontal section of the vent pipe should
have a slight downward slope from the boiler to the
vent termination. For clearances to combustible
materials refer to Figure 2B.
6. Maximum length of flexible oil vent pipe is 20 ft. The
vent pipe is also in 10 ft length.
7. Verify that flex vent pipe diameter and vent
termination inner pipe diameter correspond to a
particular direct vent configuration MPO-IQ boiler
model (see Table 6).
E. CONNECTING APPLIANCE ADAPTER TO BOILER
Figure 19: Combustion Air Tee
Assembly Installation
Figure 20: FDVS Component Breakdown
5 Direct Venting / Air Intake Piping (continued)