LAARS Mighty Venter MV2 (Sizes 175-400) - Install and Operating Manual - Manual (Page 4)

Page 4
LAARS Heating Systems
1e. Installation Restrictions
1. Make sure minimum clearances from
combustible materials required by code are
maintained.
IMPORTANT: The following clearances to
combustible materials must be maintained for the
Power Venter:
Sides: 6-inches (152mm)
Back: 8-inches (203mm)
2. All vent pipe connections between the Power
Venter and the Vent Hood will be under positive
pressure during operation, and must be sealed to
prevent leakage into the building.
3. To prevent bearing wear, and for proper Fan-
Prover Switch operation, make sure the Power
Venter motor shaft is horizontal (see Fig. 1).
4. The ambient temperature surrounding the Power
Venter must not exceed 104°F (40°C).
5. The venting system must be sloped upwards not
less than 1/4 inch per foot from the boiler to the
vent terminal. The vent system must be installed
to prevent the collection of condensate where
necessary, and must be provided with a means of
drainage.
6. Condensate lines or single wall exhaust vent
shall not be run through an unheated space or
interior part of an open chimney unless the
exhaust vent is insulated.
7. The vent system must be adequately supported to
prevent sagging, but in no case shall the supports
be less than every 3 feet (0.9m).
8. Inlet and outlet piping must conform to Figure 4,
5 or 6.
9. Do not place any elbows within two feet of
venter outlet.
SECTION 2.
2a. Side Wall Vent Hood Location
If possible, locate the side wall vent hood on a
wall not normally subjected to high winds. This will
lessen the possibility of gas valve interruption during
periods when the winds are stronger than 40 MPH
(64 kmh). The Vent Hood location must comply with
the following specifications (see Fig. 2):
Caution
Flue gas temperature can exceed 150°F (66°C)
depending on the appliance being vented and the
length of the vent system. Do not terminate a side
wall vent system where vinyl siding has been
installed on the building exterior, since damage to
the vinyl siding may result.
Figure 1. Discharge Options.
Horizontal Discharge Vertical Discharge
Air Pressure
Sensing Tube