Weil-McLain CGt User Manual

CGt SERIES BOILER

SUGGESTED SPECIFICATIONS

I. General Requirements

A. Furnish and install ( ) low pressure packaged cast iron sectional boiler(s) that

operate under induced draft.

B. Install boiler-burner unit(s) in compliance with manufacturers installation instructions.

All work must be done in a neat and workman like manner.

C. Weil-McLain qty.( ) CGt ( ) PIN boiler(s) capable of burning natural gas at 5 to

13”w.c.

1. Packaged boiler (standard).

2. Natural or propane gas fired.

3. Water.

4. Minimum 82% efficiency.

5. Induced draft.

6. Built-in Tankless Domestic Water Heater

D. Boiler(s) shall have I=B=R Hydronics Institute gross output(s) at 100% firing rate –
108 MBH per boiler.

E. Boiler(s) shall be manufactured by ISO 9001 registered company to conform to

Section IV of

the ASME Boiler and Pressure Vessel Code.

1. Individual sections (and section assembly) to be hydrostatically pressure tested
at factory in accordance with ASME requirements.

2. Maximum allowable working pressure 50 PSIG water and cast as part of
section with ASME symbol.

F. Regulatory Requirements

1. Boiler(s) and controls to comply with applicable regulations.

G. Submittals

1. Submit shop drawings and product data.

2. Submittal packet to include boiler (and burner) manufacturer descriptive

literature, installation instructions, operating instructions, and maintenance
instructions.

II. Product

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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 lo w 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.

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