John Wood Superflue Power Vent (before FVIR technology) - Manual (Page 4)

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SAFETY WARNING
Water heaters are heat producing appliances. To
avoid damage or injury, there shall be no materials
stored against the water heater and proper care shall
be taken to avoid unnecessary contact (especially by
children) with the water heater.
INSTALLATION CLEARANCES
The minimum clearances between the heater and
combustible material are:
Sides and Rear 1”
Flue Pipe 0”
Jacket Top to Ceiling 8” *
Flue Pipe Through Wall 0”
* For 40 and 50 gallon models, it is recommended
that a 36” clearance from jacket top to ceiling be
maintained in order to have sufficient room for
anode replacement should this become neces-
sary. For 60 gallon models, a 42” clearance is rec-
ommended.
This water heater is certified for installation on a com-
bustible floor.
A minimum clearance of 24" in front should be provid-
ed for inspection and servicing.
This heater is approved for alcove and closet type
installation, but maintain the minimum clearances to
combustible material listed above.
II) VENTING
COMBUSTION AIR SUPPLY
An adequate air supply shall be provided for combus-
tion and ventilation. An insufficient supply of air will
cause recirculation of combustion products resulting in
air contamination that may be hazardous to life.
When an exhaust fan is installed in the same room with
this water heater, sufficient openings for air must be
provided. Undersized openings will cause air to be
drawn into the room through the exhaust vent.
Unconfined Spaces
In unconfined spaces in buildings of other than unusu-
ally tight construction, infiltration may be adequate to
provide air for combustion, ventilation and dilution of
flue gases. Unconfined space is defined as a space
whose volume is not less than 50 cubic feet per 1,000
BTU/hour of the combined input rating of all appli-
ances installed in that space. Rooms directly adjoining
the space in which the appliances are installed,
through openings and not furnished with doors, are
considered part of the unconfined space.
Confined Spaces
(Less than 50 cubic feet per 1,000 BTU/hour)
(a) Air from Inside the Building.
See Table I and Figure 2.
Table I Confined Space
Dim.
A
D
L
D
U
H
W
CSA B149.1
1 in
2
per 1000 BTU/Hr
6” Min., 18” Max
Note 1
3” min.
per calculation from A
U.S. ANSI Z223.1
1 in
2
per 1000 BTU/Hr
12” or less
12” or less
3” min.
per calculation from A
NOTE 1: The upper opening shall be located as near
the ceiling as possible, but not lower than any relief
opening of a draft hood or draft regulator. It shall have
a free area not less than the total area of all vents or
chimneys from the appliances within the room, except
for closet type installations where the area shall not
be less than that of the lower opening.
H
D
U
A
W
H
D
L
A
W
Figure 2
FOR YOUR SAFETY
Do not store or use gasoline or other
flammable, combustible, or corrosive
vapours and liquids in the vicinity of
this or any other appliance.
WARNING
THE FLOW OF COMBUSTION AND VEN-
TILATION AIR MUST NOT BE
OBSTRUCTED.