Determine Installa On Loca On; Clearances - Rinnai FC510 Installation And Operation Manual

Determine Installa on Loca on

The heater must not be installed in a confined
space or unusually ght construc on unless
provisions are provided for adequate combus on
and ven la on air.

Na onal 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 ra ng
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 ra ng of all
appliances installed in that space.

Rooms connec ng 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 ra ng for a given unconfined space:
(L1+L2) X W X H X 1000
BTU/HR=
50
(All dimensions are in feet.)
For example:
If L1=15.5 , L2=12 , W=12 , H=8 , and there is no
door between the rooms, then for the space to be
considered unconfined the maximum ra ng is:
(15.5+12) X 12 X 8 X 1000
50
If there is a door between the 2 rooms then for the
space to be considered unconfined the maximum
ra ng is:
15.5 X 12 X 8 X 1000
50
If the appliance ra ng exceeds the maximum heater
ra ng in the calcula on above, the space is confined.
6
=52,800 BTU/HR
=29,760 BTU/HR
Fan Convector Manual
WARNING
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 ght construc on, provide
adequate combus on and ven la on air by one of
the methods described in the Na onal Fuel Gas Code,
ANSI Z223.1/NFPA 54, Sec on 5.3 or applicable local
codes.
Unusually ght construc on is defined as construc on
where:

Walls and ceilings exposed to the outside
atmosphere have a con nuous water vapor
retarder with a ra ng 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 penetra ons for plumbing, and gas lines, and at
other openings.
Clearances
The minimum clearances from combus ble materials
and for proper opera on 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 bo om
In addi on, do not install in areas where curtains,
drapes, clothing, or other moving flammables are
within 12 inches of the appliance.