Minimum Clearances To Combustibles - Space-Ray LTU80-N5 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:
Model 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
could be seriously damaged. Observe the Minimum Clearances to Combustibles listed in the manual and on the
heater at all times.
NOTE:
1. 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
control 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
to maintain the required clearances from the heater to combustibles." Space-Ray recommends posting these
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 ºF (32 ºC) above room
temperature. Building materials with a low heat tolerance (such as plastics, vinyle siding, canvas, tri-ply, etc.)
may be subject to degradation at lower temperatures. It is the installer's responsibility to assure that adjacent
materials are protected from degradation.
MINIMUM CLEARANCES TO COMBUSTIBLES
Mounted Horizontally
Sides Ceiling*
27" 6"
27" 6"
52" 6"
66" 6"
66" 6"
84" 6"
84" 6"
-4-
Angle Mounted at
Below Ends 45º Front 45º Rear
40" 30"
60" 30"
84" 30"
88" ** 40"
101" ** 40"
106" ** 48"
132" ** 48"
45º
48" 12"
48" 12"
52" 12"
66" 20"
66" 20"
84" 24"
84" 24"
Form #43155010
Mar 09