Ratings - Weil-McLain Aqua Balance WMB-155 Manual

W
TM
AquaBalance

38 Ratings

Figure 173
Ratings and engineering data
Boiler
Model
Input
Btuh
(Note 5)
WMB-80 80,000
WMB-120 120,000
155,000
WMB-155
As an Energy Star Partner, Weil-McLain
1
has determined that boilers meet the
Energy Star guidelines for energy ef-
ficiency.
NOTE: Adjusting boiler firing rate will
affect AFUE rating.
2 Based on standard test procedures
prescribed by the United States Depart-
ment of Energy.
NOTE that only Heating Capacity and
AFUE are certified by AHRI. AFUE is
also know as Annual Fuel Utilization
Efficiency or Seasonal Efficiency.
3 Net ratings are based on net installed
radiation of sufficient quantity for the
THE OUTDOOR SENSOR (SUPPLIED WITH HEATING ONLY BOILERS)
In accordance with
Section 303 of the
, this boiler is equipped
2007 Energy Act
with a feature that saves energy by re-
ducing the boiler water temperature as
the heating load decreases. This feature
is equipped with an override which is
provided primarily to permit the use of
an external energy management system
that serves the same function.
Part number 550-100-305/0118
M -
ALL OUNT GAS FIRED WATER BOILER
AHRI Certified Ratings
Heating Seasonal
Capacity Efficiency
Btuh AFUE, %
(Note 2) (Note 1)
73,000 92.4
109,000 92.2
143,000 94.4
requirements of the building and noth-
ing need be added for normal piping
and pickup. Ratings are based on a pip-
ing and pickup allowance of 1.15. An
additional allowance should be made
for unusual piping and pickup loads.
4 Boilers must be direct-vented.
Boilers require special venting. Use
only the vent materials and methods
specified in this manual.
WMB-80 or 120 vent/air pipes can be
either 2" or 3". WMB-155 is 3" only.
All vent and air pipe elbows must
be sweep elbows, NOT short-radius
elbows.
THE BOILER MUST BE INSTALLED UNLESS EXEMPTED BELOW:
(Is optional for Combi Boilers)
IMPORTANT
THIS OVERRIDE MUST NOT BE USED UNLESS AT LEAST ONE OF THE
FOLLOWING CONDITIONS IS TRUE:
• An external energy management system is installed that reduces the boiler water tem-
perature as the heating load decreases.
• This boiler is not used for any space heating.
• This boiler is part of a modular or multiple boiler system having a total input of 300,000
BTU/hr or greater.
• This boiler is equipped with a tankless coil (not applicable to Combi).
—
Boiler Manual
% Input derate vs vent length
Net
(Values shown are at MAX vent/air pipe length —
Water
Rating
Direct Vent Category ONLY
Natural gas
Btuh
2" 3"
(Note 3)
Vent/air Vent/air
piping piping
63,000 12 % 4.2
94,000 11.4 % 3.5
124,000 ---- 5.0
Notes
See (Note 7)
See Note 6)
Propane
2" 3"
Vent/air Vent/air
piping piping
% 12 % 4.2 %
% 11.4 % 3.5 %
% ---- 5.0 %
5 Ratings shown are for sea level applica-
tions only. For altitudes from sea level
to 4,500 feet above sea level, please refer
to page 67.
6 All of the boilers will automatically
de-rate as vent/air pipe length increases,
due to the pressure loss through the
piping. For vent/air pipe lengths less
than the maximum, the derate equals
the value above times vent length ÷ 100.
7 CSA - Low Lead Content only applies
to the Combi boiler models.
Vent/
Comb. Air
Connection
Diameter
Inches
(Note 4)
3" PVC/PP/SS
3" PVC/PP/SS
3" PVC/PP/SS
131