Rinnai FC510, Installation And Operation Manual

Page: 6 / 44

6 Fan Convector Manual
Determine Installation Location

The heater must not be installed in a confined
space or unusually tight construction unless
provisions are provided for adequate combustion
and ventilation air.

National Fuel Gas Code, ANSI Z223.1/NFPA 54
defines a confined space as a space whose vol-
ume is less than 50 cubic feet per 1,000 BTU per
hour (4.8m³ per kW) of the aggregate input rating
of all appliances installed in that space and an
unconfined space as a space whose volume is not
less than 50 cubic feet per 1,000 BTU per hour
(4.8m³ per kW) of the aggregate input rating of all
appliances installed in that space.

Rooms connecting directly with the space in
which the appliances are installed, through
openings not furnished with doors, are
considered a part of the unconfined space.
The following formula can be used to determine the
maximum heat rating for a given unconfined space:
BTU/HR=
(All dimensions are in feet.)
For example:
If L1=15.5 ft, L2=12 ft, W=12 ft, H=8 ft, and there is no
door between the rooms, then for the space to be
considered unconfined the maximum rating is:
=52,800 BTU/HR
If there is a door between the 2 rooms then for the
space to be considered unconfined the maximum
rating is:
=29,760 BTU/HR
If the appliance rating exceeds the maximum heater
rating in the calculation above, the space is confined.
(L1+L2) X W X H X 1000
50
(15.5+12) X 12 X 8 X 1000
50
15.5 X 12 X 8 X 1000
50
If the area in which the heater may be operated is
smaller than that defined as an unconfined space or if
the building is of unusually tight construction, provide
adequate combustion and ventilation air by one of
the methods described in the
National Fuel Gas Code,
ANSI Z223.1/NFPA 54, Section 5.3 or applicable local
codes.
WARNING
Unusually tight construction is defined as construction
where:

Walls and ceilings exposed to the outside
atmosphere have a continuous water vapor
retarder with a rating of 1 therm or less with
openings gasketed or sealed;

Weather stripping has been added on openable
windows and doors; and caulking or sealants are
applied to areas such as joint around window and
door frames, between sole plates and floors,
between wall ceiling joints, between wall panels,
at penetrations for plumbing, and gas lines, and at
other openings.
Clearances
The minimum clearances from combustible materials
and for proper operation and servicing are as follows:

2 inches from top

2 inches from back (measured from the base of
the appliance)

2 inches from sides

30 inches from front

0 inches from bottom
In addition, do not install in areas where curtains,
drapes, clothing, or other moving flammables are
within 12 inches of the appliance.