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II. Product
A. Acceptable boiler/burner manufacturer(s) include(s):
1. Weil-McLain only, as specified in Part 1, Paragraph C.
2. Other manufacturer(s) or other Weil-McLain boiler(s) must comply with specifying
engineer’s requirements, including:
a) Full intent of these specifications, and provide complete submittal including
literature, wiring diagrams, fuel piping diagrams, and a list of similar installations.
b) Submittal to be presented to specifying engineer at least seven working days for
approval before bid opening. Substitutions are not permitted after contract is
awarded.
c) Burner(s) and Energy Management Control System(s) must be tested and
approved for installation with specified boiler by boiler manufacturer.
B. Boiler construction
• Boiler sections
• Assembled with short, individual draw rods.
• Cast with sealing grooves for high temperature sealing rope to assure permanent gas-
tight seal.
• Sealed water-tight by elastomer sealing rings, not cast iron nipples. Each port opening
is machined to completely capture sealing ring between sections.
• Must be hydro-wall design to provide completely water-cooled combustion chamber.
• Provided with sufficient tappings to install required controls.
• Limited 10 year warranty against workmanship and defects to be in writing by
manufacturer.
C. Boiler(s)
• Provided with cast-in air elimination to separate air from circulating water.
• Provided with expansion tank tapping to divert separated air to expansion tank.
• Constructed to provide balanced water flow through entire section assembly using
single supply and return connections for water. No external headers are necessary for
water. Steam requires two supplies to an
external header 24” minimum from the
waterline to the bottom of the header.
• Designed with a low silhouette to provide maximum headroom.
• Furnished with insulated burner mounting plate having necessary holes and tappings
to mount burner. High temperature sealing rope is used to provide permanent gas-
tight seal between front section and plate.
• Furnished with two observation ports (one in front and one in back) to allow visual
inspection of the flame.
• Provided with cast iron flue collar with a built-in adjustable damper capable of being
locked into place after adjustment.
• High temperature sealing rope used to provide permanent gas-tight seal between
hood and section assembly.
• Furnished with heavy gauge steel cleanout plates to cover cleanout openings on the
side of the boiler(s).