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4
Mr. Heater Series Heater Operating Instructions and Owner’s Manual
Clearances To Combustibles
TABLE 1:MinimumClearancestoCombustibles(UseFigure1onpage5asaGuide)
Reflector Type Position
40,000
BTU
60,000
BTU
80,000
BTU
100,000
BTU
125,000
BTU
150,000
BTU
175,000
BTU
Standard
Reflector
(Horizontal)
A
B
C
D
6”
30”
55
30”
6”
30”
55
30”
6”
36
55
36
6”
36
74
36
6”
36
87
36
6”
36
87
36
8”
36
87
36
45°ReflectorTilt
A
B
C
E
F
12
30”
55
36
60”
12
30”
55
36
60”
18
36
55
36
60”
18
36
74
36
60”
18
36
87
36
60”
18
36
87
36
60”
18
36
87
36
60”
U-TubeStandard
(Horizontal)
A
B
C
D
6”
30”
55
30”
6”
30”
55
30”
6”
36
55
36
6”
36
74
36
6”
36
87
36
6”
36
87
36
8”
36
87
36
U-TubeOpposite
45°
A
B
C
F
12
30”
55
60”
12
30”
55
60”
18
36
55
60”
18
36
74
60”
18
36
87
60”
18
36
87
60”
18
36
87
60”
U-TubeFull4
A
B
C
E
F
12
30”
55
36
60”
12
30”
55
36
60”
18
36
55
36
60”
18
36
74
36
60”
18
36
87
36
60”
18
36
87
36
60”
18
36
87
36
60”
Unvented AboveA 36 36 36 36 36 36 36
WARNING:
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY OR DEATH.
Inallsituations,clearancestocombustiblesmustbemaintained.Failuretoobserveclearancestocombustiblesmayresultinproperty
damage,severeinjury,ordeath.
Minimumclearancesmustbemaintainedfromvehiclesparkedbelowtheheater.Signsshouldbepostedinstorageareastospecify
maximumstackingheighttomaintainrequiredclearancestocombustibles.
Cautionshouldbeusedwhenrunningthesystemnearcombustiblematerialssuchaswood,paper,rubber,etc.Considerationshouldbe
giventopartitions,storageracks,hoists,buildingconstruction,etc.
TABLE1givesminimumacceptableclearancestocombustibles.ClearancesasshowninTABLE1arenotforuseinfour-sidedenclosures.
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