Smith Cast Iron Boilers GB100W User Manual
Page 4
Page 4
GB100W NATURAL OR PROPANE BOILER
INSTALLATION AND OPERATING INSTRUCTIONS
Figure 1: Clearances to Combustible Construction
6. If the boiler is to be located in an alcove, closet or
other confined space the distances from the boiler
and it’s vent system to all combustible construction
must be equal to or greater than the minimum
clearances in Figure 1. When installed in a closet or
confined space two permanent openings of equal
area adjoining another room or rooms having
sufficient volume to meet the requirements of an
unconfined space must be provided. Each opening
must have a minimum free area of one square inch
per 1000 Btu/hr,
2200 mm
2
/kW
based on the total
input rating of all gas utilization equipment in the
confined area. Each opening must be no less than
100 in
2
,
64516 mm
2
, in size. The upper opening
must be within 12 in,
305 mm
, of, but not less than
3 in,
76 mm
, from the top of the enclosure. The
bottom opening must be within 12 in,
305 mm
, of,
but not less than 3 in, 76 mm, from the bottom of the
enclosure.
WARNING: Never install a PGB100W, propane
boiler in a closet or other confined or enclosed
spaceunless the installation conforms to the
latest revision of the National Fuel Gas Code,
ANSI Z223.1 and all applicable local building
codes! Failure to comply with this WARNING
could result in a fire or explosion causing
extensive property damage, severe personal
injury or death!
For
AL
CL
Servicing
in
mm
in
mm
in
mm
A
24
610
51
1295
N/A
N/A
B
*
*
2
51
N/A
N/A
C
6
152
6
152
6
152
D
4
102
4
102
4
102
E
7
178
7
178
10
254
F
4
102
4
102
10
254
AL = Alcove
CL = Closet
*No Front Wall in Alcove
FRONT
E
F
A
C
D
TO
COMBUSTIBLE
MATERIAL
B
NO FRONT WALL IN ALCOVE
*