SECTION 4: C
LEARANCES
TO
COMBUSTIBLES
7 of 49
SECTION 4: CLEARANCES TO COMBUSTIBLES
4.1 Re
q
uired Clearances To Combustibles
Clearances are the req
u
ired distances that
com
bu
sti
b
le o
b
jects m
u
st
b
e a
w
ay from the heater
to prevent serio
u
s fire hazards. Com
bu
sti
b
les are
materials that catch on fire and incl
u
de common
items s
u
ch as
w
ood, paper, r
ubb
er, fa
b
ric, etc.
Maintain clearances to com
bu
sti
b
les at all times for
safety.
Clearances for all heater models are located on the
serial plate of the heater and thro
u
gho
u
t the man
u
al.
Check the clearances on the serial plate to make
s
u
re the prod
u
ct is s
u
ita
b
le for yo
u
r application and
the clearances are maintained. Read and follo
w
the
safety g
u
idelines
b
elo
w
:
• Keep gasoline or other com
bu
sti
b
le material
incl
u
ding flamma
b
le o
b
jects, liq
u
ids, d
u
st or
vapors a
w
ay from this heater or any other
appliance.
• The stated clearances to com
bu
sti
b
les
represents a s
u
rface temperat
u
re of 90° F
(50° C) a
b
ove room temperat
u
re. B
u
ilding
materials
w
ith a lo
w
heat tolerance (s
u
ch as
plastics, vinyl siding, canvas, tri-ply, etc) may
b
e
s
ub
ject to degradation at lo
w
er temperat
u
res. It
is the installer’s responsi
b
ility to ass
u
re that
adjacent materials are protected from
degradation.
• Cons
u
lt local Fire Marshal, Fire Ins
u
rance Carrier
or other a
u
thorities for approval of proposed
installation
w
hen there is a possi
b
ility of
expos
u
re to com
bu
sti
b
le air
b
orne materials or
vapors.
4.2 Clearances To Combustibles
Clearances m
u
st
b
e as indicated
on Page 7, Figure
4
. If clearances to com
bu
sti
b
les are not indicated,
then installation clearances apply.
Fi
g
ure 4: Installation Clearances and Clearances to Combustibles
WARNING
Fire Hazard
Keep all flammable objects, liquids and
vapors the required clearances to
combustibles away from heater.
Some objects can catch fire or explode
when placed close to heater.
Failure to follow these instructions can
result in death, injury or property damage.
6"
(15 cm)
31"**
(79 cm)
3"
(
8
cm)
6"
(15 cm)
Clearances to Combustibles
24" for
ade
q
uate
air flow access
axial fan.
10
'
(3 m)
W
all
Terminal
Roof Terminal
Top
20
'
(6.0 m) - 30
'
(9.1 m)
Max. Mounting Height*
Installation Clearances
(Optional separated
combustion concentric
v
enting shown.)
* Recommended mo
u
nting height varies
w
ith heater inp
u
t.
Heaters may
b
e mo
u
nted at a higher level if destratification
fans are installed.
Note: Venting directly from top of heater not applica
b
le
on Models 150 - 400.
Clearance to Vent: 2" (5 cm)
**31" (79 cm) minim
u
m is necessary
for servicing.
The heater m
u
st al
w
ays
b
e installed at least 6' (2 m) a
b
ove the floor.
The vent pipe m
u
st have clearance from com
bu
sti
b
les
b
y 2" (5 cm).
If installed at lo
w
levels
w
here individ
u
als can come in contact
w
ith hot heat
exchanger components, adeq
u
ate g
u
arding m
u
st
b
e provided.
Содержание UHA 150
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