Install Instructions

Ratings — Evergreen
®
boilers
Notes
1 As an Energy Star Partner, Weil-McLain
has determined that Evergreen
®
70, 110
and 155 boilers meet the Energy Star
guidelines for energy effi ciency.
NOTE: Adjusting boiler fi ring rate will
affect AFUE rating.
2 Based on standard test procedures
prescribed by the United States
Department of Energy. Ratings also
referred to as CSA Output.
NOTE that only DOE Heating Capacity
and AFUE are certifi ed by AHRI. AFUE
is also know as Annual Fuel Utilization
Effi ciency or Seasonal Effi ciency.
3 Net AHRI ratings are based on net
installed radiation of suffi cient quantity
for the requirements of the building
and nothing 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 Evergreen
®
boilers must be direct-vented.
Evergreen
®
boilers require special
venting, consistent with Category IV
boiler.
Use only the vent materials and methods
specifi ed in this manual.
Evergreen
®
70 vent/air pipes can be
either 2" or 3".
Evergreen
®
110 or155 vent/air pipes must
be 3".
All vent and air pipe elbows must be sweep
elbows, NOT short-radius elbows.
5 Ratings shown are for sea level applications
only. For altitudes from sea level to 5,500
feet above sea level, the Evergreen
®
boiler requires no modifi cations
and automatically derates itself by
approximately 4% per 1000 feet above sea
level.
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 (% Input derate vs. vent length)
times vent length ÷ 100.
THE OUTDOOR SENSOR SUPPLIED WITH THE BOILER MUST BE INSTALLED UNLESS EXEMPTED BELOW:
IMPORTA NT
In accordance with Section 303 of the
2007 Energy Act
, this boiler is equipped
with a feature that saves energy by
reducing 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.
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
temperature 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 Evergreen
®
).
Boiler
Model
EVG
CSA
Input
CSA
Output /
DOE
Heating
Capacity
Net AHRI
Water
Rating
DOE
Seasonal
Effi ciency
Boiler
Water
Content
Vent/
Comb. Air
Connection
Diameter
% Input derate vs vent length
(Values shown are at MAX
vent/air pipe length —
See Note 6)
Direct Vent Venting ONLY
Btuh
(Note 5)
Btuh
(Note 2)
Btuh
(Note 3)
AFUE, %
(Note 1)
Gallons
Inches
(Note 4)
Natural gas Propane
2"
Vent/air
piping
3"
Vent/air
piping
2"
Vent/air
piping
3"
Vent/air
piping
70 70,000 65,000 57 95.2 2.54 3" PVC 12 % 5 % 12 % 5 %
110 110,000 101,000 88 95.0
2.54 3" PVC N/A 5 % N/A 5 %
155 155,000 143,000 124 95.1
3.22 3" PVC N/A 5 % N/A 5 %
Figure 121 Ratings and engineering data — Evergreen
®
70/110/155
Part number 550-100-191/0917
139
®
gas-fired water boiler — 70/110/155 Boiler Manual