LGB - Weil-McLain

TECHNICAL NOTES
C.S.A. Input — Firing rate in BTU/hr. for atmospheric gas boilers
based on C.S.A. certification test procedures.
I=B=R Input — Firing rate in gallons per hour of oil or BTU/hr. of gas
in accordance with Hydronics Institute test procedures.
DOE Heating Capacity — Heat output of the boiler based on
standard test procedures prescribed by the U. S. Department of Energy.
Applies C.S.A. to boilers Grossunder Output 300,000 — Heat BTU/hr. outputinput.
of the boiler based on tests
conducted at the C.S.A. Laboratory. Applies to atmospheric gas boilers
with I=B=R inputs of Gross 300,000 Output BTU/hr. — Heat and over. output of the boiler based on tests
conducted in accordance with Hydronics Institute procedures. Applies
to oil, Net gas I=B=R and gas-oil Ratings boilers — The with power DOE heating burners capacity, when the input C.S.A. is gross
output, or I=B=R gross output less deductions for piping and pickup.
Certified Ratings — Ratings when boiler is fired with special burners
and/or under conditions other than stipulated by I=B=R code
SELECTING THE BOILER
Boilers should be selected based on the Net I=B=R rating when
piping and pickup factors are considered normal. Net I=B=R ratings are
shown in BTU/hr. for water & steam and in square feet of steam.
To select residential boilers for gravity hot water systems, floor panel
systems, hot water or steam systems with larger than normal piping and
pickup factors, and replacement boilers on hot water or steam systems
with old style radiation and large piping, the old I=B=R piping and pickup
factors should be used. These older I=B=R factors will be approximated
if the boiler size is increased about 15 percent. Weil-McLain shall have
no liability for the selection of the appropriate boiler for the ultimate user.
ASME CONSTRUCTION
All Weil-McLain boiler sections meet the requirements of the ASME
Boiler & Pressure Vessel Code, Section IV, Heating Boilers.
DOMESTIC HOT WATER LOAD
Weil-McLain boilers may be equipped to provide domestic hot water
by using an indirect-fired water heater or tankless heater. The volume
of domestic water produced depends upon the capacity of the heater
and the firing rate of the boiler.
For Weil-McLain indirect-fired water heaters, use Weil-McLain indirectfired
water heater selection information for proper sizing.
For tankless water heaters used in small and medium sized
residences, where the demand for hot water is normal, an additional
allowance is generally not required for domestic water heating in
selecting the boiler. Domestic water heater sizes and capacities are
listed for each boiler, and directions are given for figuring additional
allowance in larger homes with more than two bathrooms.
Weil-McLain Ratings for Tankless Heaters: Tankless heater ratings
are determined from a series of tests in the respective boiler and based
upon an intermittent draw schedule which allows a specific recovery
period after each interval of a draw. The heater ratings in gallons per
minute are expressed in average temperature rise of 100°F. and apply
only to specific tankless heaters when used in specified boilers.
FUELS
Oil Firing: Weil-McLain boilers for oil firing are available for oil and
for combination gas/oil. Oil fired ratings are based on boilers being fired
at firing rates listed, burning oil with a heat content of 140,000 BTU’s per
gallon. (150,000 BTU’s per gallon of heavy oil.)
Gas Firing: Weil-McLain boilers for gas firing are available for
atmospheric gas, power gas and combination gas/oil. Net ratings of
these boilers when fired with gas are the same as those shown for oil,
providing the draft conditions on the installation are comparable to those
used for oil firing.
RADIATION
Baseboard Ratings: All Weil-McLain baseboards have approved
I=B=R ratings expressed in BTU’s as shown in sales literature.
ELEVATIONS ABOVE 2,000 FEET
All ratings are based on elevations up to 2,000 feet. For atmospheric
gas boilers at elevations above 2,000 feet, ratings should be reduced at
the rate of 4 percent for each 1,000 feet above sea level. For oil or power
gas heating units above 2,000 feet elevation, do not arbitrarily increase
the boiler size; a larger burner may be required at additional cost.
50 CYCLE OPERATION
For heating units with burners operating on 50 cycle rather than 60
cycle current, the rating should be reduced 20 percent, or the published
rating can be used and a larger burner may be required. Consult your
Weil-McLain representative for specific information.
Now America’s #1 name in cast iron boilers offers homeowners an
optional, extended 5 or 10 year warranty that covers parts and labor
on Weil-McLain boilers and indirect-fired water heaters.
What is the Plan?
An exclusive Weil-McLain program that provides
coverage for labor and/or defective parts
furnished by Weil-McLain for up to 10 full years
from date of installation.
What does the Plan cover?
The plan may be used to cover any Weil-McLain boiler up to
600 MBH input or any indirect-fired water heater that is:
o Less than one (1) year old
o Used in a residential application
How the Plan works:
1.Installers need to sign up with the Plan administrator
to participate
(Call toll-free 1-800-824-5090 to sign up).
2.Use the Plan to sell boilers & water heaters.
3.Install the product(s) and sign up the homeowner
(within one year of installation).
4.Purchase the Plan contract.
5.Repair the covered product if a problem occurs
6.Submit your claim for parts and labor.
7.Receive your check...it’s that easy!
TPS #51 (0812) Page 75