4
Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
b. Whether stripping has been added on openable
windows and doors, and
c. Caulking or sealants are applied to areas such
as joints around windows and door frames,
between wall-ceiling joints, between wall panels, at
penetrations for plumbing, electrical, and gas lines,
and at other openings.
If you home does not meet all of the three criteria
above, see
Determing the Type of Heater Location
Space
, below.
Confined Space and Unconfined Space
The
National Fuel Gas Code, NFPA 54/ ANSI Z223.1
defines a confined space as a space whose volume is
less than 50 cubic feet per 1,000 Btu per hour (4.8 m
3
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 (4.8 m
3
per kW) of the aggregate
input rating of all appliances installed in that space.
Rooms communicating directly with the space in which
the appliances are installed*, through openings not
furnished with doors, are considered a part of the
unconfined space.
*Adjoining rooms are communication only if there
are door less passageways or ventilation grills
between them.
DETERMINING THE TYPE OF HEATER
LOCATION SPACE:
Use this method to determine if you have a confined or
unconfined space.
Note:
the space includes the room in which
you install heater plus any adjoining rooms with
doorless passageways or ventilation grills between
the rooms.
1. Find the volume of the space by multiplying room
length x width x height.
Example: Space size 18ft (length) x 18ft. (width) x 8ft.
(height) = 2592
If additional ventilation to adjoining room is supplied
with grills or openings, add the volume of these rooms
to the total volume of the space.
2. Divide the space volume by 50 cubic feet to
determine the maximum Btu/hr the space can
support.
Example: 2592 cu.ft. (volume of space) / 50 cu.ft. =
51.8 or 51,800 (maximum Btu/hr the space
can support)
WARNING:
This heater shall not be installed in a
room or space unless the required volume of indoor
combustion air is provided by the method described
in the National Fuel Gas Code, ANSI Z223.1/NFPA
54, the International Fuel Gas Code, or applicable
local codes.
3. Add the Btu/hr of all the fuel-burning appliances
in the space such as, Vent–free heater, Gas water
SAFETY DEVICE
This heater has a pilot with an Oxygen Depletion
Sensor (ODS) safety shut off system. The ODS/pilot
shuts off the heater if there is not enough fresh air.
IGNITION SYSTEM
PIEZO: BF10NG/ RD10NG
–
The heater is equipped
with a piezo manual ignitor. This system requires no
matches, batteries, or other source to light heater.
LOCAL CODES
Install and use heater with care.
Installation must conform to local codes or in the
absences of local codes, use the latest edition of
National Fuel Gas Code ANSI Z223.1/NFPA 54.
UNPACKING
1. Remove heater from carton.
2. Remove all protective packaging applied to
heater for shipment.
3. Check heater for any shipping damage. If
heater is damaged, promptly inform dealer
where you bought heater.
FRESH AIR FOR COMBUSTION AND
VENTILATION
WARNING
: This heater shall not be installed in
a confined space or unusually tight construction
unless provisions are provided for adequate
combustion and ventilation air. Read the following
instructions to insure proper fresh air for this and
other fuel-burning appliances in your home.
ESTABLISHING ADEQUATE VENTILATION
The following are excerpts from
National Fuel Gas
Code, NFPA 54/ ANSI Z223.1, Section 5.3, Air for
Combustion and Ventilation
. All spaces in homes fall
into one of the three following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
This heater must not be installed in a confined space
or unusually tight construction unless provisions are
provided for adequate combustion and ventilation air.
The information on pages 4 and 5 will help you classify
your space and provide adequate ventilation.
Unusually Tight Construction
If your home meets all of the three following criteria you
must provide additional fresh air. See
Ventilation Air
from Outdoors
, page 5.
Unusually tight construction is defined as construction
where:
a. Walls and ceilings exposed to the outside
atmosphere have a continuous water vapor retarder
with a rating of one perm (6 x 10
-11
kg per pa-sec-m
2
)
or less with openings gasketed or sealed and
