SECTION 3: C
RITICAL
C
ONSIDERATIONS
5 of 91
SECTION 3: CRITICAL CONSIDERATIONS
3.1 Re
q
uired Clearances to Combustibles
Clearances are the req
u
ired distances that
comb
u
stible objects m
u
st be a
w
ay from the heater to
prevent fire hazards. Comb
u
stible materials that may
catch fire incl
u
de common items s
u
ch as
w
ood,
paper, r
u
bber, fabric, etc.
Maintain clearances to
combustibles at all times for safety.
Clearances for all heater models are located on the
b
u
rner of the heater and
in this man
u
al. Check the
clearances on each b
u
rner for the model heater
being installed to make s
u
re the prod
u
ct is s
u
itable
for yo
u
r application and the clearances are
maintained. Read and follo
w
the safety g
u
idelines
belo
w
:
• Keep gasoline or other comb
u
stible materials
incl
u
ding flammable objects, liq
u
ids, d
u
st or
vapors a
w
ay from this heater or any other
appliance.
• The stated clearances to comb
u
stibles represents
a s
u
rface temperat
u
re of 90° F (50° C) above
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 be s
u
bject to degradation
at lo
w
er temperat
u
res. It is the installer’s
responsibility to ass
u
re that adjacent materials
are protected from degradation.
• Maintain clearances from heat sensitive material,
eq
u
ipment and
w
orkstations.
• Maintain clearances from vehicles parked belo
w
the heater.
• Maintain clearances from s
w
inging and overhead
doors, overhead cranes, vehicle lifts, partitions,
storage racks, hoists, b
u
ilding constr
u
ction, etc.
• In locations
u
sed for the storage of comb
u
stible
materials, signs m
u
st be posted to specify the
maxim
u
m permissible stacking height to maintain
req
u
ired clearances from the heater to the
comb
u
stibles. Signs m
u
st be posted adjacent to
the heater thermostat. In the absence of a
thermostat, signs m
u
st be posted in a
conspic
u
o
u
s location.
• 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 possibility of expos
u
re
to comb
u
stible airborne materials or vapors.
• Hang heater in accordance to the minim
u
m
s
u
spension req
u
irements
• If the radiant t
u
bes m
u
st pass thro
u
gh the b
u
ilding
str
u
ct
u
re, be s
u
re that adeq
u
ate sleeving and fire
stop is installed to prevent scorching and/or fire
hazard.
NOTE:
1. All dimensions are from the s
u
rfaces of all t
u
bes, co
u
plings and elbo
w
s.
2. Clearances B, C and D can be red
u
ced by 50% after 25' (7.5 m) of t
u
bing do
w
nstream
from
w
here the b
u
rner and b
u
rner t
u
be connect.
WARNING
Fire Hazard
Keep all flammable objects, liquids and
vapors the minimum required clearances to
combustibles away from heater.
Some objects will catch fire or explode when
placed close to heater.
Failure to follow these instructions can result
in death, injury or property dama
g
e.
FIGURE 3: STANDARD REFLECTOR
(inches)
(centimeters)
Model
A
B
C
D
A
B
C
D
CTHN-40
5
20
41
20
13
51
104
51
CTHN-60
5
27
51
27
13
69
130
69
CTHN-80
5
30
58
30
13
76
147
76
CTHN-100
5
32
60
32
13
81
152
81
CTHN-125
5
35
65
35
13
89
165
89
CTHN-150
5
39
71
39
13
99
180
99
CTHN-175
8
44
74
44
20
112
188
112
CTHN-200
8
47
76
47
20
119
193
119