Part number 550-142-085/0712
– 9 –
WM97+
gas
-
fired
water
boiler
—
Boiler Manual
Provide clearances for service
access — RECOMMENDED
1. See Figure 1 for recommended service clearances.
2. If you do not provide minimum service clearances
shown, it might not be possible to service the boiler
without removing it from the space.
Closet or small-enclosure installations
which do not provide at least these recom-
mended clearances require the specially-
sized and placed air openings shown in
Figure 2
.
Provide clearances from combustible
materials — REQUIRED
1. See Figure 2 for REQUIRED minimum clearances. ALL installa-
tion must provide at least these minimums.
2. Hot water pipes — at least ½” from combustible materials.
3. Vent pipe — at least
C\zn
” from combustible materials.
4. See Figure 1 for service clearance minimums.
Closet or small-enclosure installations which do
not provide at least the recommended service clear-
ances shown in Figure 1
require the specially-sized
and placed air openings shown in Figure 2
.
Figure 2
REQUIRED
minimum clearances
(
all dimensions are in inches
)
Figure 1
RECOMMENDED
service clearances
(
all dimensions are in inches
)
Boiler location
(continued)
A Provide combustion air/ventilation openings per Figure 20, page 24 or as otherwise directed
in this manual or by applicable codes.
If the installation does not provide the
minimum clearances in Figure 1
, then the enclosure MUST HAVE air openings located
per Figure 2, above. Each of these air openings must have free area of at least 1 square inch
per 1,000 MBH of boiler input.
B Left side clearance to combustibles = 0 inches minimum
C Top of boiler clearance to combustibles = 10.5 inches minimum
D Right side clearance to combustibles = 0 inches minimum
E Bottom of boiler clearance to combustibles = 5.75 inches minimum (must be 18 inches
above floor for garage installations)
F Clearance in front of the boiler = 0.5 inches, but
24 inches minimum required for service
G Air openings must be located in the FRONT of the enclosure, as shown. They must be no
more than 12 inches from the floor or ceiling, as shown.
H Vent pipe must be minimum 3/16 inch from combustibles. Opening in combustible wall,
floor, ceiling or roof must be 3/8” larger than flue pipe diameter, fitted with galvanized steel
thimble, or larger if required by codes or as specified by vent pipe manufacturer.
A Provide combustion air/ventilation openings per Figure 20, page 24 or as
otherwise directed in this manual or by applicable codes. NOTE: If the instal-
lation does not provide the minimum clearances in this illustration, then the
enclosure must have air openings located and sized per Figure 2.
B Left side service clearance = 3 inches minimum
C Service clearance above top of boiler = 12 inches minimum
D Right side service clearance = 3 inches minimum
E Service clearance below the boiler = 12 inches minimum
F Service clearance in front of the boiler = 24 inches minimum
Companion Water Heater (CWH)
installations — CWH units require a minimum clearance of
12 inches
on one side, right
or left, for installation of the mixing valve and for clear view of the associated label. Provide this clearance to allow for future
CHW installations as well as current installations.
Mount the boiler at the height specified in Figure 5, page 11
.
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