Table of Contents
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Page 2
CONTENTS
Before You Start ................................................. page 2
Boiler Location ................................................... page 2
Common Vent Systems ...................................... page 6
Boiler Assembly ................................................ page 7
General Piping Requirements .......................... page 14
Water Boiler Piping .......................................... page 15
Steam Boiler Piping .......................................... page 18
Burner Installation ............................................ page 21
Electrical Wiring ............................................... page 22
Boiler Operation .............................................. page 22
Boiler Maintenance .......................................... page 23
Repair Parts ..................................................... page 25
Health Warnings .......................................... back cover
BEFORE YOU START
This manual covers the assembly, installation, operation
and maintenance of a Series 28A low pressure steam
or hot water boiler.
The 28A Series boilers are supplied completely knocked
down for field assembly, knocked down but with an
assembled block or as complete factory assembled
packaged boilers. All boiler components should be
inspected for damage upon receipt. Any damage should
be immediately reported to the trucker or wholesaler. All
boiler components should be stored in a clean dry area.
To obtain the safe, dependable, efficient operation and
long life for which this boiler was designed, these
instructions must be read, understood and followed.
The Series 28A boilers have been design certified by
CSA. Each unit has been constructed and hydro-
statically tested for a maximum working pressure of 15
psi for steam, 80 psi for water, in accordance
with Section IV of the A.S.M.E. Boiler and Pressure
Vessel Code for cast iron boilers.
All aspects of the boiler installation must conform to the
requirements of the authority having jurisdiction, or, in
the absence of such requirements, to the National Fuel
Gas Code, ANSI Z223.1/NFPA 54-latest revision or to
the Installation of Oil Burning Equipment, ANSI/NFPA
31.
Where required by the authority having jurisdiction, the
installation must conform to the Standard for Controls
and Safety Devices for Automatically Fired Boilers,
ANSI/ASME CSD-1.
SERIES 28A BOILER INSTALLATION AND OPERATION INSTRUCTIONS
In Canada, the installation must be in accordance with
the requirements of CAN/CGA B149.1 or .2, Installation
Code for Gas Burning Appliances and Equipment.
In the Commonwealth of Massachusetts the installation
of a gas burner must be performed by a licensed
plumber or gas fitter.
The owner should maintain a record of all service work
performed with the date and a description of the work
done. Include the name of the service organization for
future reference.
Direct all questions to your Smith Cast Iron Boiler
distributor or contact the Smith Customer Service
Department. Always include the model and serial
numbers from the rating plate of the boiler in question.
BOILER RATINGS & CAPACITIES
Before undertaking the installation of the 28A Series
boiler check the boiler rating plate to ensure that the
boiler has been sized properly for the job. The "Net
I=B=R Ratings" specify the equivalent amount of direct
cast iron radiation that the boiler can supply under
normal conditions. Also ensure that the boiler has been
set up for the type of fuel available at the installation
site.
BOILER LOCATION
1. Locate the boiler in an area that provides good
access to the unit. A minimum distance of 6 in,
0.15m must be maintained between the boiler
and combustible construction. Servicing may
require the removal of jacket panels so service
clearances should be maintained. Allow a minimum
clearance of 3 ft, 0.9 m between adjacent
construction and the left side, front and smoke hood.
A minimum clearance of 2 ft, 0.6 m should be
maintained between adjacent construction and the
right side and back of the boiler. Accessibility
clearances should take precedence over minimum
clearances to combustible construction, Figure 1.
2. An optimum site will be level, central to the piping
system, close to a chimney and have adequate
fresh air for combustion.
3. The boiler should be installed on a level, flat,
concrete floor or pad that is structurally sound and
will support the weight of the boiler. If a concrete
pad is used it must be at least 2" thick. Never install
the boiler on a concrete floor or pad that contains
wires, cables, water pipes or hoses. This boiler is
designed for non-combustible floors!
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