Ratings - Freestyle 2 Series Manual

FreeStyle
®
2
series

41 Ratings

Figure 178
Ratings and engineering data —
Boiler
Model
Input
MBH
(Note 5)
FS-80
80.0
FS-120
120.0
FS-155
155.0
As an Energy Star Partner, William-
1
son-Thermoflo has determined that
FreeStyle® boilers meet the Energy Star
guidelines for energy efficiency.
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
requirements of the building and noth-
THE OUTDOOR SENSOR (SUPPLIED WITH HEATING Only BOILERS) THE BOILER
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 550-142-950/0122
-
wall mount gas fired water boiler
FreeStyle
AHRI Certified Ratings
Heating Seasonal
Capacity Efficiency
MBH AFUE, %
(Note 2) (Note 1)
75 95.0
112 95.0
144 95.0
ing need be added for normal piping
and pickup. Ratings are based on a
piping and pickup allowance of 1.15. An
additional allowance should be made
for unusual piping and pickup loads.
4 Boilers are designed to be direct-vented.
FreeStyle® boilers require special vent-
ing. Use only the vent materials and
methods specified in this manual.
Boilers may be direct exhaust vented.
Vent/air pipes can be either 2" or 3".
All vent and air pipe elbows must
be sweep elbows, NOT short-radius
elbows.
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).
–
®
Series 2 80/120/155
* Low Lead Content
% Input derate vs vent length
Net
(Values shown are at MAX vent/air pipe length —
Water
See Note 6)
Rating
Direct Vent Category ONLY
Natural gas
MBH
2" 3"
Vent/air Vent/air
(Note 3)
piping piping
65 12 % 4.2
97 11.4 % 3.5 %
125 13.6 % 5.0 %
Notes
boiler manual
(Note 7)
Propane
2" 3"
Vent/air Vent/air
piping piping
% 12 % 4.2 %
11.4 % 3.5 %
13.6 % 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 70.
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
135