Weil-McLain 2 Series Manual page 116

®
SlimFit Series 2
Ratings — SlimFit Series 2 boilers
Ratings and engineering data
Boiler
Gross
Model
Output
Input
Number
Btuh Btuh
(Note 1) (Note 1)
SF1000 1,000,000 958,000
SF1500 1,500,000 1,437,000 1,250,000
SF2000 2,000,000 1,906,000 1,657,000
Ratings shown are for sea level applications only. For altitudes
1
above sea level, the SlimFit boiler requires no modifications and au-
tomatically de-rates itself by approximately 4% per 1,000 feet above
sea level. For elevations over 5,500 feet, see the high altitude section
in this manual for required control parameter changes.
The length of the vent and air piping will affect the maximum input.
See Figure 120, below for derate % vs vent/air piping length.
Net AHRI ratings are based on net installed radiation of sufficient
2
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.
Combustion efficiency is based on AHRI testing procedure
3
BTS-2000, and equal to 100% minus flue loss.
Derate due to vent/air piping length (graphs show maximum firing rate as % of rated input)
Determine vent/air piping equivalent length (feet) from Figure 24, page 29 — Use the length for
Derate % for Direct Exhaust
Boiler
6" vent piping
Derate % = 0.08 x L
SF1000
Example: If L=75 feet, Derate % = .08 x 75 = 6.0%
SF1500
NOT ALLOWED
SF2000
NOT ALLOWED
Failure to follow all instructions can result in flue gas spillage and carbon monoxide emissions, causing severe personal injury or death.
This document must only be used by a qualified heating installer/service technician. Read all instructions, including this
addendum and the Boiler Manual, before installing. Perform steps in the order given. Failure to comply could result in severe
personal injury, death or substantial property damage.
Installation must comply with local requirements and with the National Fuel Gas Code - ANSI Z223.1/NFPA54 – latest
edition for U.S. installations or Natural Gas and Propane Installation Code - CAN/CSA B149.1 for Canadian installations.
116
COMMERCIAL CONDENSING GAS
AHRI Ratings
Net Combustion
Rating Efficiency
Btuh %
(
(Note 2) Note 3)
833,000 96.1
95.9
95.8
Notes
8" vent piping
NOT ALLOWED
Derate % = 0.03 x L
Example: If L=75 feet, Derate % = .03 x 75 = 2.3%
Derate % = 0.05 x L
Example: If L=95 feet, Derate % = .05 x 95 = 4.8%
-
FIRED WATER BOILER
DOE
Boiler
Thermal Water Vent/Air
Efficiency Content Pipe Size
%
Inches
Gallons
(Note 4) (Note 5)
95.8 13 6, 8 or 10
95.8 19 8 or 10
95.3 25 8 or 10
4
Thermal efficiency is based on AHRI testing procedures BTS-2000.
"SlimFit boilers can be direct vent or direct exhaust vented, either
5
through a side wall or through roof, as instructed in this manual and
compliant with all local codes. SlimFit Boilers require special vent-
ing, consistent with Category IV boiler.
Category II, 10" venting requires 10" vent adapter, see pages 27-28
and Figure 96, page 105, "Vent/air piping components" for
adapter part numbers.
Use only the vent materials and methods identified in this manual."
The values are for the stack flow rate at the maximum firing rate for
6
the given boiler. The values can vary depending on the location of
the installation and operating conditions.
6" vent/air piping
Derate % = 3.0 + (0.08 x L)
Example: If L=60 feet, Derate % = 3.0 + .08 x 60 = 7.8%
NOT ALLOWED
NOT ALLOWED
— Boiler Manual
Stack/vent Boiler weight
flow rate (pounds)
Dry Operating
scfm weight weight
(no water) (filled)
(Note 6)
279 865 975
418 1,050 1,210
558 1,250 1,460
Notes
L
in the equations.
Derate % for Direct Vent
8" vent/air piping
Derate % = 0.04 x L
Example: If L=125 feet, Derate % = .04 x 125 = 5.0%
Derate % = 0.05 x L
Example: If L=80 feet, Derate % = .05 x 80 = 4.0%
Derate % = 0.07 x L
Example: If L=60 feet, Derate % = .07 x 60 = 4.2%
Part number 550-100-180/0917
Shipping
weight
1,130
1,310
1,510