SlimFit Suggested Specifications

Weil-McLain | 999 McClintock Drive, Suite 200, Burr Ridge, IL 60527 | Tel 630.560.3700 | www.weil-mclain.com

I. General Requirements

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

boiler(s) with cast aluminum sectional heat exchangers that use outside or inside air for combustion.

B. Install packaged boiler unit(s) according to manufacturer’s installation instructions. All work to be done in a neat and

workmanlike manner.

C. ________ (quantity) Weil-McLain SlimFit -________ (size), ___ (L or R) packaged boiler(s) capable of burning natural

gas.

D. Boiler(s) shall have an AHRI gross output at 100% fire rate of _________ MBH per boiler.

E. Boiler(s) shall be 95+% minimum AHRI certified thermal efficient as required by BTS 2000

F. Boiler shall be capable of full modulation firing with a turn down of up to 6 to 1

G. Boiler(s) shall be manufactured by ISO 9001 registered company to conform to Section IV of the ASME Boiler and

Pressure Vessel Code

1. Sectional cast aluminum block to be fire tested and hydrostatically pressure tested at factory in accordance with

ASME requirements

2. Maximum allowable working pressure 100 PSIG water as listed on the rating label

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

4. Boiler(s) shall be fully factory packaged in acceptance with ASME CSD-1

II. Product

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

1. As specified in Part I, Paragraph C

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

including:

(a) Full intent of these specifications

(b) Provide complete submittal including literature, manuals, wiring diagrams, fuel piping diagrams, and a list

of similar installations. Any alternate must be of similar size and footprint, piping configuration, clearance

requirements and heating surface

are not permitted after contract is awarded

B. Boiler Construction

1. Boiler(s) heat exchanger:

(a) Cast aluminum sectional block

2. Factory Assembled and Tested

3. Boiler(s) main components:

(a) The boiler shall have the ability to be assembled in both a left-handed and right-handed orientation. In

multiple boiler systems, this will allow two boilers, one right-handed and one left-handed, to be installed

side-by-side. This orientation will allow easy access for cleaning and maintenance, as well as placing all

gas and water connections for the two boilers directly next to one another

(b) The combustion chamber will be sealed and located at the top of the block casting which will be of counter

flow design

covering to provide a wide range of modulating firing rates

SlimFit™ High Efficiency Gas Boiler

Models 1,000 – 2,000 MBH

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SlimFit™ High Efficiency Gas Boiler Models 1,000 – 2,000 MBH I. II. General Requirements A. Furnish and install ________ (qty.) packaged, modulating, sealed combustion, power-vented, high efficiency gas-fired boiler(s) with cast aluminum sectional heat exchangers that use outside or inside air for combustion. B. Install packaged boiler unit(s) according to manufacturer’s installation instructions. All work to be done in a neat and workmanlike manner. C.
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C. D. (d) Boiler(s) shall be supplied with a gas valve designed with negative pressure regulation (fan venturi effect "pulls" gas through valve rather than gas pressure “pushing” gas through valve). Negative pressure regulation enables the boiler to operate in a safe condition at 3.5”W.C. inlet gas pressure. The inlet (natural) gas pressure to the boiler gas valve should be a minimum of 3.0” W.C. and a maximum of 14” W.C. If inlet gas pressure exceeds 14” W.C.