Minimum Clearances To Combustibles - Space-Ray LTU Series Installation And Operation Instructions Manual

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MINIMUM CLEARANCES TO COMBUSTIBLES

Minimum clearances to combustibles shall be measured from the outer surfaces as shown in the following
diagram:
Mod Mod Mod Model No. el No. el No. el No.
LTS 40, 50
LTS 60, 75
LTS/LTU 80, 90
LTS/LTU 100
LTS/LTU 110, 120, 125, 130
LTS/LTU 140, 150, 160, 175
LTS/LTU 180, 200, 225, 250
* When used indirect vented, minimum clearance for CEILING must be: 12" for LTS 40-75 and 18" for LTS/LTU
80-250. If optional corner and U-bend reflectors are not used, the clearance must be 18".
** Maximum clearance below reduces to 72" once you are 20 ft. downstream from the control box.
▲WARNING: Certain materials or objects, when stored under the heater, will be subjected to radiant heat and ▲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
could be seriously damaged. Observe the Minimum Clearances to Combustibles listed in the manual and on the could be seriously damaged. could be seriously damaged. could be seriously damaged.
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 clearan The clearan The clearances specified above must be maintained to combustibles and other materials that may be The clearan ces specified above must be maintained to combustibles and other materials that may be ces specified above must be maintained to combustibles and other materials that may be ces 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. damaged by temperatures 90ºF above ambient temperature. damaged by temperatures 90ºF above ambient temperature.
control box. In areas used for storage of combustible materials wher control box. control box. control box. In areas used for storage of combustible materials where they may be stacked below the heater, In areas used for storage of combustible materials wher In areas used for storage of combustible materials wher
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 from the heater to combustibles." to maintain the required clearances from the heater to combustibles." to maintain the required clearances from the heater to combustibles." Space to maintain the required clearances from the heater to combustibles."
s s s s igns adjacent to the heater thermostat or other suitable location that will provide enhanced visibility. igns adjacent to the heater thermostat or other suitable location that will provide enhanced visibility. igns adjacent to the heater thermostat or other suitable location that will provide enhanced visibility. igns 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 ºF ºF ºF ºF (32 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
temperature. Building materials with a low heat to temperature. Building materials with a low heat to temperature. Building materials with a low heat tolerance (such as plastics, vinyle siding, canvas, tri temperature. Building materials with a low heat to
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
materials are protected from degradation. materials are protected from degradation. materials are protected from degradation. materials are protected from degradation.
Horizontal
MINIMUM CLEARANCES TO COMBUSTIBLES MINIMUM CLEARANCES TO COMBUSTIBLES
MINIMUM CLEARANCES TO COMBUSTIBLES MINIMUM CLEARANCES TO COMBUSTIBLES
Mounted Horizontally Mounted Horizontally Mounted Horizontally Mounted Horizontally
Sides Sides Sides Sides
27"
27"
52"
66"
66"
84"
84"
Observe the Minimum Clearances to Combustibles listed in the manual and on the Observe the Minimum Clearances to Combustibles listed in the manual and on the Observe the Minimum Clearances to Combustibles listed in the manual and on the
lerance (such as plastics, vinyle siding, canvas, tri- - - - ply, etc.) lerance (such as plastics, vinyle siding, canvas, tri lerance (such as plastics, vinyle siding, canvas, tri
-4-
45° Angle (Maximum)
Ceiling* Ceiling* Ceiling* Ceiling* Below Below Below Below Ends Ends Ends Ends
6" 40" 30"
6" 60" 30"
6" 84" 30"
6" 88" ** 40"
6" 101" ** 40"
6" 106" ** 48"
6" 132" ** 48"
Clearances to combustibles are posted on the Clearances to combustibles are posted on the Clearances to combustibles are posted on the
e they may be stacked below the heater, e they may be stacked below the heater, e they may be stacked below the heater,
Space Space Space- - - - Ray recommends posting these Ray recommends posting these Ray recommends posting these Ray recommends posting these
Angle Mounted at Angle Mounted at
Angle Mounted at Angle Mounted at
45º 45º 45º 45º
45º Front 45º Front 45º Front 45º Front 45º Rear 45º Rear 45º Rear 45º Rear
48" 12"
48" 12"
52" 12"
66" 20"
66" 20"
84" 24"
84" 24"
(32 ºC) above room ºC) above room
(32 (32 ºC) above room ºC) above room
ply, etc.) ply, etc.) ply, etc.)
Form #43155010
Sept 2011