6
TOP
TOP
FRONT
BELOW
REAR
BELOW
FRONT
REAR
TOP
BELOW
FRONT
REAR
0° MOUNTING
1°-30° MOUNTING
31°-45° MOUNTING
CLEARANCE TO COMBUSTIBLES*
CLEARANCES FOR
ALL HEATERS*
inches (cm)
TOP OF REFLECTOR
12 (31)
END OF BURNER
12 (31)
END OF U-BEND
68 (173)
•
Reflector width = 15.75” (40cm)
•
Top, Front, and Rear clearances are measured from reflector.
•
Below clearance is measured from bottom of tube.
•
Clearance to combustibles* measurements are given in inches (cm).
0° TO 30° REFLECTOR ANGLE
31° TO 45° REFLECTOR ANGLE
SERIES
MBTUH (kW)
FRONT
REAR
BELOW
FRONT
REAR
BELOW
40 (12)
45 (13)
50 (15)
40 (102)
40 (102)
40 (102)
40 (102)
12 (31)
40 (102)
A
55 (16)
60 (18)
50 (127)
50 (127)
50 (127)
50 (127)
12 (31)
50 (127)
MB
B
65 (19)
70 (21)
75 (22)
80 (23)
85 (25)
24 (61)
24 (61)
60 (152)
na
na
na
B
90 (26)
95 (28)
100 (29)
24 (61)
24 (61)
60 (152)
na
na
na
B
MC
105 (31)
110 (32)
115 (34)
120 (35)
B / MC / C
125 (37)
32 (82)
32 (82)
72 (183)
na
na
na
MC / C
130 (38)
135 (40)
140 (41)
145 (42)
150 (44)
48 (122)
48 (122)
82 (209)
70 (189)
12 (31)
82 (209)
155 (45)
160 (47)
165 (48)
170 (50)
175 (51)
58 (148)
58 (148)
92 (234)
80 (203)
12 (31)
92 (234)
C
180 (53)
185 (54)
190 (56)
195 (57)
200 (59)
68 (173)
68 (173)
102 (259)
90 (229)
12 (31)
102 (259)
•
*MINIMUM CLEARANCES
specified in these tables must be maintained to combustible and other materials which may
be damaged by temperatures 90°F above (50°C above) ambient room temperature. These clearances to combustibles
are specified on each heater’s serial plate. In locations used for the storage of combustible materials, signs must be
posted to specify the maximum permissible stacking height to maintain required clearances from the heater to the
combustibles. (ANSI Z223.1/NFPA 54) Gas and electrical supply lines shall not be located within the minimum
clearances to combustibles. na = not applicable.
•
Carefully examine materials surrounding the heater. Materials, such as plastic, having low service temperature ratings
can be discolored or damaged. It is the installer’s responsibility to ensure that building materials with a low heat
tolerance, which may degrade at lower temperatures, are protected to prevent degradation.
•
Fire sprinkler heads must be located at an appropriate distance from the heater. This distance may exceed the
published clearance to combustibles. Certain applications will require the use of high temperature sprinkler heads or
relocation of the heaters. Sprinkler systems containing propylene glycol or other flammable substances are not to be
used in conjunction with this heater without careful consideration for and avoidance of potential fire or explosion
hazards. For further information consult NFPA 13. Always observe applicable state and local codes.
