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4.0)
MINIMUM CLEARANCES TO COMBUSTIBLES
Install the warnings card (ordered separately) and complete the blank spaces using the clearances from
combustibles table below. See Section 26 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:
Model No.
Model No.
Model No.
Model No.
PTS/PTU 40/25
PTS/PTU 50/30
PTS/PTU 75/50
PTS/PTU 100/65
PTS/PTU 125/80
PTS/PTU 150/100
PTS/PTU 175/110
PTS/PTU 200/125
* When used indirect vented, minimum clearance for CEILING must be: 12" for PTS/PTU 50-75 and 18" for
PTS/PTU 100-200. If optional corner and u-bend reflectors are not used, the clearance must be 18".
** Maximum clearance below reduces by 50% once you are 25ft. downstream from the burner box.
▲WARNING:
▲WARNING: Certain materials or objects, when stored under the heater, will be subjected to radiant heat and
▲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. Observe the Minimum Clearances to Combustibles listed in the manual and on the
could be seriously damaged. Observe the Minimum Clearances to Combustibles listed in the manual and on the
could be seriously damaged. Observe the Minimum Clearances to Combustibles listed in 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 clear
The clearances specified above must be maintained to combustibles and other materials that may be
ances specified above must be maintained to combustibles and other materials that may be
The clear
The clear
ances specified above must be maintained to combustibles and other materials that may be
ances 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
burner
burner
burner box. In areas used for storage of combustible materials w
burner
box. In areas used for storage of combustible materials where they may be stacked below the heater,
box. In areas used for storage of combustible materials w
box. In areas used for storage of combustible materials w
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." Space
to maintain the required clearances from the heater to combustibles." Space- - - - Ray recommends posting the
to maintain the required clearances from the heater to combustibles." Space
to maintain the required clearances from the heater to combustibles." Space
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. 2. 2. 2. The stated clearance to combustibles represents a surface temperature of 90 ºF (32 ºC) above room
The stated clearance to combustibles represents a surface temperature of 90 ºF (32 ºC) above room
The stated clearance to combustibles represents a surface temperature of 90 ºF (32 ºC) above room
The stated clearance to combustibles represents a surface temperature of 90 ºF (32 ºC) above room
temperature. Building materials with a low hea
temperature. Building materials with a low hea
temperature. Building materials with a low hea
temperature. Building materials with a low heat tolerance (such as plastics, vinyle siding, canvas, tri
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
Ceiling*
Ceiling*
Ceiling*
Ceiling*
22"
6"
22"
6"
22"
6"
28"
6"
28"
6"
34"
6"
34"
6"
42"
6"
t tolerance (such as plastics, vinyle siding, canvas, tri
t tolerance (such as plastics, vinyle siding, canvas, tri- - - - ply, etc.)
t tolerance (such as plastics, vinyle siding, canvas, tri
-4-
45° Angle (Maximum)
Below
Below
Below
Below
Ends
Ends
Ends
Ends
45º Front
45º Front
45º Front
45º Front 45º Rear
52"
15"
56"
15"
60"
15"
70" **
15"
76" **
20"
81" **
20"
86" **
20"
93" **
20"
here they may be stacked below the heater,
here they may be stacked below the heater,
here they may be stacked below the heater,
Ray recommends posting these se se se
Ray recommends posting the
Ray recommends posting the
Angle Mounted at
Angle Mounted at
Angle Mounted at
Angle Mounted at
45º
45º
45º
45º
45º Rear
45º Rear
45º Rear
40"
12"
48"
12"
52"
12"
58"
12"
66"
12"
70"
12"
75"
12"
80"
12"
ply, etc.)
ply, etc.)
ply, etc.)
Form 43343530
Aug 2012
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