Accessibility Clearances; Combustion & Ventilation Air - RBI IEW-199 Installation And Operation Instructions Manual

C. ACCESSIBILITY CLEARANCES
1. The Infinite Energy boiler is certified for closet
installations with zero clearance to combustible
construction. In addition, it is design certified for use
on combustible floors.
2. Figure 1.1 shows the minimum recommended
clearances to allow reasonable access to the boiler for
Models IEW-199 and IEW-399. However, local codes
or special conditions may require greater
E. D. COMBUSTION AND
clearances.
VENTILATION AIR
D. COMBUSTION AND VENTILATION AIR
1. The Infinite Energy boiler is designed for operation
with combustion air piped directly to the boiler from
outside the building (sealed combustion). If the boiler
is vented vertically, the combustion air can be
supplied from within the building only if adequate
combustion air and ventilation air is provided in
accordance with the section of the National Fuel Gas
Code entitled, "Air for Combustion and Ventilation" or
applicable provisions of the local building code.
Subsections 3 through 10 as follows are based on the
National Fuel Gas Code requirements.
2. If the combustion air is piped directly to the boiler
from outside the building, no additional combustion
or ventilation air is required. Otherwise, follow the
National Fuel Gas Code recommendations
summarized in subsections 3 through 10.
Figure 1.1: Minimum Accessibility Clearances – IEW-199 & IEW-399
3. Required Combustion Air Volume: The total required
volume of indoor air is to be the sum of the required
volumes for all appliances located within the space.
Rooms communicating directly with the space in
which the appliances are installed and through
combustion air openings sized as indicated in
Subsection 3 are considered part of the required
volume. The required volume of indoor air is to be
determined by one of two methods.
a. Standard Method: The minimum required volume
of indoor air (room volume) shall be 50 cubic feet
per 1000 BTU/Hr (4.8 m3/kW). This method is to
be used if the air infiltration rate is unknown or if
the rate of air infiltration is known to be greater
than 0.6 air changes per hour. As an option, this
method may be used if the air infiltration rate is
known to be between 0.6 and 0.4 air changes per
hour. If the air infiltration rate is known to be
below 0.4 then the Known Air Infiltration Rate
Method must be used. If the building in which this
appliance is to be installed is unusually tight, RBI
recommends that the air infiltration rate be
determined.
b. Known Air Infiltration Rate Method:
Required Volume =
fan
where:
I = Input of the fan assisted appliances
fan
assisted in Btu/hr
ACH = air change per hour (percent of the
volume of the space exchanged per
hour, expressed as a decimal)
Note: These calculations are not to be used for
infiltration rates greater than 0.60 ACH.
PREINSTALLATION
⎛
⎝
3
15 ft I
fan
⎜
⎜
Btu
ACH 1000 /
⎝
⎛
hr
3