Weil-McLain Aqua Balance WMB-155 Manual page 7

W
TM
AquaBalance
2 Prepare boiler location
Clearances
Provide clearances from
combustible materials — REQUIRED
1. See Figure 2 for REQUIRED minimum clearances. ALL
installation must provide at least these minimums.
2. Hot water pipes — at least
3. Vent pipe — at least
3/16
4. See Figure 2 for service clearance minimums.
If the unit is enclosed in a cabinet or mounted
alongside, a space must be provided for remov-
ing the casing and for normal maintenance
operations. The minimum measurements to be
respected are given in Figure 2.
Figure 2 REQUIRED minimum clearances
( all dimensions are in inches
Minimum
required
for
Combustion
Recommended
for
Service
Part number 550-100-305/0118
M -
ALL OUNT GAS FIRED WATER BOILER
" from combustible materials.
1/2
" from combustible materials.
)
A Minimum 1.00"
B Minimum 12.00"
C Minimum 12.00"
D Minimum 12.00"
A Minimum 36.00"
B Minimum 36.00"
C Minimum 24.00"
D Minimum 36.00"
—
Boiler Manual
continued
A Provide combustion air/ventilation openings per Figure 24, page 22
or as otherwise directed in this manual or by applicable codes.
If the installation does not provide the minimum clearances,
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 = 1.0 inches minimum
C Top of boiler clearance to combustibles = 12.0 inches minimum
D Right side clearance to combustibles = 1.0 inches minimum
E Bottom of boiler clearance to combustibles = 12 inches minimum
(must be 18 inches above floor for garage installations)
F Clearance in front of the boiler = 12.0 inches, but 36 inches mini-
mum required for service
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.
ADDITIONAL service clearance may be
needed, depending on how piping is routed
to the boiler.
Provide clearances for service
access — RECOMMENDED
1. See Figure 2, 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.
3. Clearance D, Figure 2 allows for the installation of piping
as shown in Figure 6, page 11, plus a union, close nipple
and elbow.
A Provide combustion air/ventilation openings per Figure 24, page 22 or
as otherwise directed in this manual or by applicable codes. NOTE: If
the installation does not provide the minimum clearances in this il-
lustration, then the enclosure must have air openings located and sized
per Figure 2.
B Left side service clearance = 36 inches minimum
C Service clearance above top of boiler = 24 inches minimum
D Right side service clearance = 24 inches minimum
E Service clearance below the boiler = 36 inches minimum
F Service clearance in front of the boiler = 36 inches minimum
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