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A. Acceptable boiler/burner manufacturer(s) include(s):
1. Weil-McLain only, as specified in Part 1, Paragraph C.
a) Other manufacturer(s) or other Weil-McLain boiler(s) must comply
with specifying engineer’s requirements, including: 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) Energy Management Control System(s) must be tested and approved
for installation with specified boiler by boiler manufacturer.
B. Boiler construction
1. Boiler sections
a) Assembled with tie rods.
b) Parallel ground sealed with high temperature silicone sealant to assure
permanent gas-tight seal.
c) Sealed water-tight by elastomer sealing rings, not cast iron nipples. Each
port opening is machined to accept elastomer sealing rings between
sections.
d) Provided with sufficient tappings to install required controls.
2. Boiler(s)
a) Provided with cast-in air elimination to separate air from circulating water.
b) Provided with expansion tank tapping to divert separated air to expansion
tank.
c) Constructed to provide balanced water flow through entire section
assembly using single supply and return connections for water. No
external headers are necessary.
d) Designed with a low silhouette to provide maximum headroom.
e) Elastomer sealing rings are to be used to provide permanent water-tight
seal between sections. Unlike cast iron or steel push nipples, the
elasticity of the seals fills any gaps caused by misalignment or expansion
or contraction.
f) Constructed with high-grade stainless steel burner tubes.
g) Shipped with insulated heavy gauge steel jacket(s) with durable
powdered paint enamel finish. Jacket shall have two piece top panel for
easier servicing.
h) Provided with built-in tankless heater and 3-way valve for domestic
priority.
C. Boiler foundation(s):
Installer to construct needed support and level concrete foundation(s) where
boiler room floor is uneven or will not support the weight of the boiler(s).
D. Boiler trim:
1. All electrical components to be of high quality and bear the U.L. label.