Weil-McLain GV90+ Bedienungsanleitung

Weil-McLain

500 Blaine Street

Michigan City, IN 46360-2388

http://www.weil-mclain.com

C-2101 (0411)

Page 1 of 3

I. General Requirements

A. Furnish and install ________ (qty) packaged, sealed combustion, power-vented, high

efficiency gas-fired boiler(s) with cast-iron sectional primary heat exchanger(s) and stainless

steel secondary heat exchanger(s).

B. Install packaged boiler unit(s) according to manufacturer’s installation instructions. All work to

be done in a neat and workmanlike manner.

C. Weil-McLain ________ (qty) GV90+________ (size), packaged boiler(s) capable of burning

(natural) (propane) gas.

D. Boiler(s) shall have I=B=R Hydronics Institute gross output at 100% fire rate _________ MBH

per boiler.

E. Boiler(s) shall be 91% minimum DOE efficient as required by National Energy Conservation

Act or ASHRAE 90.1.

F. Boiler(s) shall be manufactured 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 cast as part of section with

ASME symbol.

G. Regulatory Requirements

1. Boiler(s) and controls to complywith applicable regulations.

2. Boiler(s) shall meet U.S. Environmental Protection Agency and Department of Energy

guidelines for “Energy Star” energy efficiency.

II. Product

A. Acceptable boiler manufacturer(s) include(s):

1. Weil-McLain only, as specified in Part I, Paragraph C.

GV90+ Boiler

Suggested Specifications

Weil-McLain

500 Blaine Street

Michigan City, IN 46360-2388

http://www.weil-mclain.com

C-2101 (0411)

Page 2 of 3

2. Other manufacturer or other Weil-McLain boiler(s) must comply with specifying

engineer’s requirements, including:

a) Full intent of these specifications, and

b) Provide complete submittal including literature, manuals, and wiring

diagrams, fuel piping diagrams, and list of similar installations. The alternate

must be of similar size and footprint, piping configuration, clearance

requirements and heating surface.

c) Submittal presented to engineer at least seven working days before bid

opening for approval. Substitutions are not permitted after contract is

awarded.

B. Boiler Construction

1. Cast Iron Boiler Sections

a) Assembled with tie rods and sealed with high temperature silicone sealant to

assure a permanent gas-tight seal.

b) Sealed water-tight by elastomer sealing rings, not cast-iron nipples. Each

port opening is machined to accept sealing ring between sections in order to

assure uniform compression of the sealing rings and to protect the sealing

rings from contaminants.

c) Sections shall have wide waterways to reduce heat concentration and

tendency for liming.

2. Secondary Heat Exchanger

a) Secondary heat exchanger(s) will be of the counter flow shell and tube type

employing dimpled tubes and baffles and constructed using welded stainless

steel for added efficiency.

3. Boiler(s)

a) The combustion chamber will be sealed and located at the top of the section

which will be of counter flow design, to assure that sediment and any lime

that might form will fall to the bottom, away from the crown sheet area.

b) The burner shall be premix combustion type, a single burner with tight,

efficient flame, located in a totally sealed combustion chamber.

c) Electronic control module must be of integrated solid state technology

utilizing LED’s for sequence of operation and service diagnostics.

Weil-McLain

500 Blaine Street

Michigan City, IN 46360-2388

http://www.weil-mclain.com

C-2101 (0411)

Page 3 of 3

d) Boiler(s) shall be supplied with a gas valve designed with negative pressure

regulation (fan suction “pulls” gas through valve rather than gas pressure

“pushing” gas through valve). This enables the boiler to operate in a safe

condition at a derated output, even if the inlet gas pressure should drop to

as low as 2 inches W.C. The inlet (natural) (propane) gas pressure to the

boiler gas valve should be a minimum of 4” W.C. and a maximum of 13”

W.C. If inlet gas pressure exceeds 13” W.C., a 100% lock-up type gas

pressure regulator of adequate size must be installed in gas supply piping

and adjusted to prevent pressure in excess of 13” W.C.

C. Venting and Combustion Air

1. Boiler(s) must be capable of using outside air piped directly to boiler (direct vent), or

inside boiler room air for combustion (direct exhaust).

2. The boiler(s) shall be vented and/or exhausted using 3-inch PVC, CPVC, ABS, or

AL29-4Cstainless according to manufacturer’s required schedules and grades.

3. When using outside air piped directly to boiler for combustion, inlet and termination

of these pipes must be connected either through the roof or the sidewall using

termination kit supplied by the manufacturer.

4. All venting and exhausting should follow manufacturer’s recommendations and

instructions for safety and performance.

D. Boiler Trim

1. All electrical components to be of high quality and third (3rd) party recognized.

2. Water boiler(s) controls furnished:

a) High limit temperature control (220 degrees F maximum allowable boiler

water temperature).

b) Combination pressure-temperature gauge. Gauge dial clearly marked and

easy to read.

c) ASME certified pressure relief valve, set to relieve at 30 PSIG. Optional

relief valve available up to and including maximum allowable working

pressure.

d) Section block temperature limit switch.

E. Boiler Manuals

1. The boiler(s) shall be provided with complete instruction manuals, including:

a) Boiler Installation Manual

b) User’s Manual

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