Burnham MPC Technical Drawing
BURNHAM COMMERCIAL 27 February 2008
MPC Multiple Pass Commercial Boiler – Suggested Specifications
2.1 GENERAL
A. Reference is made to the clause entitled “Buy American Act – Balance of Payments Program –
Construction Materials” FAR 52.225-9. Notwithstanding a bidder’s right to offer identifiable
foreign construction material in its bid pursuant to FAR 52.225-9, the awarding authority does
not anticipate accepting an offer that includes foreign construction material.
B. All manufacturers to be considered shall be required to meet or exceed scheduled I=B=R ca-
pacities and ratings and will be held to strict compliance with these contract specifications. For
factory assembled, packaged and firetested boilers, the complete boiler shall be approved as a
unit by Underwriters Laboratories.
C. Installing contractor shall include, as part of his contract, all charges and costs for boiler and
burner testing, start-up, checkout, adjusting, field and state inspections, including service contracts for systems and equipment as here-in-after specified. Provide signed documentation to
the awarding authority for completion of specified procedures.
D. Contractor shall obtain certificate of boiler inspection after boiler installation has been com-
pleted and pay all fees associated with such inspection. After receipt of certificate of inspection, installing contractor shall furnish a suitable glass front frame in which to place said certificate. Frame, with inspection certificate inserted therein, shall then be placed on or posted in
a suitable location within the boiler room in which the new boilers have been installed.
E. Installing contractor shall obtain from the boiler manufacturer pertinent (O&M) operating, test-
ing, and cleaning instructions for the boilers, burners, controls and safety devices furnished
with the Boiler(s).
F. It shall be the responsibility of the installing contractor to deliver O&M manuals, together with
complete wiring and piping diagrams, to the owner/user and to obtain a receipt for the instructions. The receipt shall be filed with the installation report.
G. Written notification specifying the name, address, telephone number and available service pro-
gram of a third party burner service group as herein specified.
2.2 WARRANTY
A. The manufactured heating units, equipped with cast iron/metal push nipple connectors, the
boiler manufacturer shall warrant that the cast iron sections of each boiler will be free from defects in material and workmanship under normal usage for a period of ten years from the date
of original installation.
1. Burners: The burner manufacturer shall warrant each burner for a period of 15 months
from date of shipment.
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BURNHAM COMMERCIAL 27 February 2008
MPC Multiple Pass Commercial Boiler – Suggested Specifications
2.3 PRODUCTS:
A. 3-PASS CAST IRON BOILER – MODEL MPC
1. Hot water boiler shall be a high efficiency, pressurized, cast iron sectional wet base
boiler and not require a refractory combustion chamber. It shall be suitable for forced
draft firing and capable of achieving a minimum combustion efficiency of 88% fired
with No. 2 oil and 85% fired with gas. Thermal efficiency shall be a minimum of 86%
with No. 2 oil and 83% fired with gas. Heat transfer shall be enhanced by the addition
of removable baffles.
2. Boiler shall be a 3-pass cast iron sectional type design with large combustion chamber
and horizontal flue passes with cast fins. Class 25 high silicone content cast iron shall
provide resistance to temperature variations and thermal stress. A high-temperature
silicone-coated fiberglass rope gasket will be compressed into a cast tongue and groove
connection around the perimeter of the section, providing a durable, gas tight seal.
3. Boiler shall have a return mixing tube with drilled openings in each section, allowing
proportionate distribution of return water throughout the entire section assembly. Cool
return water shall be pre-heated by the hot supply water as it enters the section assembly thereby reducing thermal stress on individual sections without the use of external
mixing devices. Boiler supply water temperatures, measured on the supply manifold
shall be no less than 130ºF. Return water coming back to the boiler may be no less
than 80ºF. System piping shall be sized for a maximum temperature difference between the boiler supply and return water of 40ºF. However, a maxiumum delta T of
80ºF across the boiler is allowable.
4. A single supply water manifold shall be located at the rear of the boiler with eight tappings for the installation of temperature and pressure controls, gauges, probe-type low
water cut-offs, and electronic control sensors. A single top rear return connection shall
be considered standard equipment.
5. Boiler shall be furnished as a knocked down unit for field erection. Sections shall be
assembled using precision machined cast iron push nipples.
a. [USE FOR FACTORY PACKAGED] Boiler shall be factory assembled and
installed on a structural steel frame/base, completely packaged with burner and
controls mounted and wired. Section assembly shall be hydrostatically pressure tested @ 120 PSI prior to shipment. Packaged boiler shall be shrink
wrapped for protection.
b. [USE FOR FACTORY PACKAGED AND FIRE TESTED] Boiler shall be
factory assembled and installed on a structural steel frame/base, completely
packaged with burner and controls mounted and wired. Burner shall be factory
fire tested to ensure proper operation before shipment. Boiler jacket shall bear
Heating, Ventilating and Air Conditioning
15500-2
BURNHAM COMMERCIAL 27 February 2008
MPC Multiple Pass Commercial Boiler – Suggested Specifications
the UL (Underwriters Laboratories) logo and comply with all UL795 (gas) and
UL 726 (oil) safety standards. Section assembly shall be hydrostatically pressure tested @ 120 PSI prior to shipment. Packaged boiler shall be shrink
wrapped for protection.
c. [USE FOR FACTORY ASSEMBLED SECTIONS] Cast iron sections shall be
factory assembled and installed as a complete block assembly with boiler
jacket, burner, and controls shipped separately
6. Cast iron burner swing door shall be lined with lightweight refractory insulation and
shall have reversible hinges, allowing a minimum of 90° swing to the left or right side
of boiler, allowing unobstructed access to combustion chamber and flue passages. The
flue passages and combustion chamber shall be accessible from the front of the boiler
for cleaning, and from the back of the boiler to vacuum soot and combustion residue
from the fireside.
7. Rear flue collector, with test tapping, shall be constructed of cast iron and shall be concealed under a highly insulated boiler jacket.
8. Boiler shall be equipped with a flange mounted flame retention type burner. Input,
output and combustion efficiency shall be certified to efficiency test procedures specified in I=B=R/BTS-2000. Boiler efficiencies must meet ASHRAE 90.1 and the National Energy Policy Act of 1992 requirements.
9. Boiler shall be constructed for 80 PSI water working pressure in accordance with the
ASME Section IV Rules for Construction of Heating Boilers. Individual sections shall
have been subjected to a hydrostatic pressure test of 200 PSIG at the factory before
shipment and they shall be stamped or cast with the ASME ‘H’ symbol.
10. The boiler shall be provided with a heavy duty 20 gauge steel jacket with modular 4inch thick insulation and have a rust resistant powder coat finish. The boiler jacket
shall contain a concealed electrical chaseway for power and limit circuit wiring within
the top jacket panels, providing a clean finished look when the jacket is installed. Individual lift-off jacket side panels may be installed after system piping and allow ease of
access to the boiler sections.
11. Boiler trim shall include:
a. One (1) 3-1/2” inch dia. combination pressure-temperature gauge.
b. Safety high limit aquastat; auxiliary safety high limit aquastat with manual re-
set (must specify on order); low fire hold aquastat (LHL and full modulation
burners only).
Heating, Ventilating and Air Conditioning
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