NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
4
4
. Compare the maximum BTU/Hr the space
can support with the actual amount of BTU/
Hr used.
_________ BTU/Hr
(max. the space can support)
_________ BTU/Hr
(actual amount of BTU/Hr used)
Example:
40,960
BTU/Hr
(max. the space can support)
66,000
BTU/Hr
(actual amount of BTU/Hr used)
The space in the above example is a confined
space because the actual BTU/Hr used is more
than the maximum BTU/Hr the space can sup-
port. You must provide additional fresh air.
WARNING: IF THE AREA IN WHICH THE
HEATER MAY BE OPERATED IS SMALLER
THAN THAT DEFINED AS AN UNCON-
FINED SPACE OR IF THE BUILDING IS OF
UNUSUALLY TIGHT CONSTRUCTION,
PROVIDE ADEQUATE COMBUSTION AND
VENTILATION AIR BY ONE OF THE METH-
ODS DESCRIBED IN THE NATIONAL FUEL
GAS CODE, ANSI Z223.1 1992, SECTION
5.3 OR APPLICABLE LOCAL CODES.
Your options are:
a.
Rework equations adding the space of ad-
joining room(s). If the extra volume pro-
vides an unconfined space, then remove
door or add ventilation grills between rooms.
Refer to National Fuel Gas Code, ANSI Z223.1
1992, Section 5.3.
b.
Vent room directly to the outdoors. Refer to
National Fuel Gas Code, ANSI Z223.1 1992,
Section 5.3.
If the actual BTU/Hr used is less than the
maximum BTU/Hr the space can support, then
the space is an unconfined space. You will need
no additional fresh air ventilation for an uncon-
fined space.
LOCATION OF FIREPLACE
Carefully select the best location for installation
of your VFST or VFPF series Unvented Room
Heater. The following factors should be taken
into consideration:
•
Clearance to side wall, ceiling, woodwork
and windows.
•
Location must not be affected by drafts
caused by kitchen exhaust fans, return air reg-
isters for forced air furnaces/air conditioners,
windows or doors.
•
Installation must provide adequate ventila-
tion and combustion air.
•
Do not install the VFST or VFPF series heat-
ers in a sleeping room or bathroom.
•
Never obstruct the front opening of the heater
or restrict the flow of combustion and ventila-
tion air.
•
This appliance may be installed in an after-
market* manufactured (Mobile) Home, where
not prohibited by state or local codes.
*Aftermarket: Completion of sale, not for pur-
pose of resale, from the manufacturer.
•
Minimize modifications to existing con-
struction.
To ensure even heat distribution, it is best to
position the heater centrally within the rooms.
Make sure there is adequate ventilation where
the heater is installed. The gas appliance will
shut off if the oxygen level falls below 18%.
These appliances are uniquely suited for instal-
lations requiring a utility shelf positioned di-
rectly above the fireplace. Utility shelves like
these are commonly used for locating televi-
sion sets and decorative plants.
To provide for the lowest possible shelf sur-
face, combustible materials used to support a
utility shelf directly above these appliances
should be positioned just above the appliance
top spacers. The minimum height from the
base of the appliance to the underside of com-
bustible materials used to construct a utility
shelf is 43
¹⁄₄
” (1099 mm).
The appliance should be mounted on a fully
supported base extending the full width and
depth of the unit. The appliance may be located
on or near conventional construction materials.
However, if installed on combustible materials,
such as carpeting, vinyl tile, etc., a metal or
wood barrier covering the entire bottom sur-
face must be used.
If the appliance is to be elevated above floor
level, a solid continuous platform must be
constructed.
WARNING: MAINTAIN MINIMUM
CLEARANCES.
Do not install in the vicinity of gasoline or other
flammable liquids. The heater must be kept
clear and free from these combustible materi-
als and may not be located near where they are
stored.
Clearances
WARNING: DO NOT INSTALL VFST SE-
RIES UNVENTED ROOM HEATERS IN
SLEEPING QUARTERS, OR IN RECRE-
ATIONAL VEHICLES.
WARNING: DO NOT INSTALL THE VFST
UNVENTED ROOM HEATER:
• WHERE CURTAINS, FURNITURE,
CLOTHING OR OTHER FLAMMABLE
OBJECTS ARE LESS THAN 42" FROM
THE FRONT OF THE UNVENTED ROOM
HEATER.
• IN HIGH TRAFFIC AREAS.
• IN WINDY OR DRAFTY AREAS.
Ensure the minimum clearances shown in
Fig-
ures 1 and 2 are maintained.
Combustible mantles may be installed above
the appliance (as shown in
Figure 2 ). The
mantle projection may be extended beyond 8" if
the height above the firebox opening is in-
creased proportionately as detailed by the in-
crements shown.
