Form #42710000
May 2013
-3-
4.0)
MINIMUM CLEARANCES TO COMBUSTIBLES
Failure to do so may result in death, serious injury or
property damage.
Combustible material must be located outside the
clearance dimensions listed.
Install the warnings card (ordered separately) and complete the blank spaces using the clearances from
combustibles table below. See Section 24 for a printed copy of the warnings card.
Minimum clearances to combustibles shall be measured from the outer surfaces as shown in the following
diagram:
End
End
Ceiling
Below
Front
Rear
45° Angle (Maximum)
* Ceiling
Below
Side
Side
Horizontal
MINIMUM CLEARANCES TO COMBUSTIBLES
MINIMUM CLEARANCES TO COMBUSTIBLES
MINIMUM CLEARANCES TO COMBUSTIBLES
MINIMUM CLEARANCES TO COMBUSTIBLES
Model No.
Model No.
Model No.
Model No.
Mounted Horizontally
Mounted Horizontally
Mounted Horizontally
Mounted Horizontally
Angle Mounted at
Angle Mounted at
Angle Mounted at
Angle Mounted at
45º
45º
45º
45º
Sides
Sides
Sides
Sides
Ceiling*
Ceiling*
Ceiling*
Ceiling*
Below
Below
Below
Below
Ends
Ends
Ends
Ends
45º Front
45º Front
45º Front
45º Front 45º Rear
45º Rear
45º Rear
45º Rear
LTU 40, 50
24”
6”
40”
15”
40”
12”
LTU 60, 75
24”
6”
60”
15”
52”
12”
* When used indirect vented, minimum clearance for CEILING must be: 12”.
▲WARNING:
▲WARNING:
▲WARNING:
▲WARNING:
Certain materials or objects, when stored under the heater, will be subjected to radiant heat and
Certain materials or objects, when stored under the heater, will be subjected to radiant heat and
Certain materials or objects, when stored under the heater, will be subjected to radiant heat and
Certain materials or objects, when stored under the heater, will be subjected to radiant heat and
could be seriously damaged. Observe the Minimum Clearances to Combustibles listed i
could be seriously damaged. Observe the Minimum Clearances to Combustibles listed i
could be seriously damaged. Observe the Minimum Clearances to Combustibles listed i
could be seriously damaged. Observe the Minimum Clearances to Combustibles listed in the manual and on the
n the manual and on the
n the manual and on the
n the manual and on the
heater at all times.
heater at all times.
heater at all times.
heater at all times.
NOTE:
NOTE:
NOTE:
NOTE:
1.
1.
1.
1. The clearances specified above must be maintained to combustibles and other materials that may be
The clearances specified above must be maintained to combustibles and other materials that may be
The clearances specified above must be maintained to combustibles and other materials that may be
The clearances specified above must be maintained to combustibles and other materials that may be
damaged by temperatures 90ºF above ambient temperature. Clearances to combustibles are posted on the
damaged by temperatures 90ºF above ambient temperature. Clearances to combustibles are posted on the
damaged by temperatures 90ºF above ambient temperature. Clearances to combustibles are posted on the
damaged by temperatures 90ºF above ambient temperature. Clearances to combustibles are posted on the
c
cc
control box. In areas used for storage of combustible materials where they may be stacked below the heater,
ontrol box. In areas used for storage of combustible materials where they may be stacked below the heater,
ontrol box. In areas used for storage of combustible materials where they may be stacked below the heater,
ontrol box. In areas used for storage of combustible materials where they may be stacked below the heater,
NFPA54 requires that the installer must post signs that will “specify the maximum permissible stacking height
NFPA54 requires that the installer must post signs that will “specify the maximum permissible stacking height
NFPA54 requires that the installer must post signs that will “specify the maximum permissible stacking height
NFPA54 requires that the installer must post signs that will “specify the maximum permissible stacking height
to maintain the required clearances fr
to maintain the required clearances fr
to maintain the required clearances fr
to maintain the required clearances from the heater to combustibles.” Space
om the heater to combustibles.” Space
om the heater to combustibles.” Space
om the heater to combustibles.” Space----Ray recommends posting these
Ray recommends posting these
Ray recommends posting these
Ray recommends posting these
signs adjacent to the heater thermostat or other suitable location that will provide enhanced visibility.
signs adjacent to the heater thermostat or other suitable location that will provide enhanced visibility.
signs adjacent to the heater thermostat or other suitable location that will provide enhanced visibility.
signs adjacent to the heater thermostat or other suitable location that will provide enhanced visibility.
2. The stated clearance to combustibles represents a surface temperature of 90
2. The stated clearance to combustibles represents a surface temperature of 90
2. The stated clearance to combustibles represents a surface temperature of 90
2. The stated clearance to combustibles represents a surface temperature of 90 ºF
ºF
ºF
ºF (32
(32
(32
(32 ºC) above room
ºC) above room
ºC) above room
ºC) above room
temperature. Building materials with a low heat tolerance (such as plastics, vinyle siding, canvas, tri
temperature. Building materials with a low heat tolerance (such as plastics, vinyle siding, canvas, tri
temperature. Building materials with a low heat tolerance (such as plastics, vinyle siding, canvas, tri
temperature. Building materials with a low heat tolerance (such as plastics, vinyle siding, canvas, tri----ply, etc.)
ply, etc.)
ply, etc.)
ply, etc.)
may be subject to degradation at lower temperatures. It is the installer’s responsibility to assure that adjacent
may be subject to degradation at lower temperatures. It is the installer’s responsibility to assure that adjacent
may be subject to degradation at lower temperatures. It is the installer’s responsibility to assure that adjacent
may be subject to degradation at lower temperatures. It is the installer’s responsibility to assure that adjacent
material
material
material
materials are protected from degradation.
s are protected from degradation.
s are protected from degradation.
s are protected from degradation.
