Weil-McLain PFG SERIES User Manual

1
I. General Requirements
A. Furnish and install _____ (qty) packaged atmospheric gas cast iron sectional
boiler(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) PFG-_____ (size) -PIDN, -PIN, -SPN, packaged
water boiler(s) capable of burning natural gas (propane available as product
option).
D. The inlet natural gas pressure to the boiler gas valve(s) should be a minimum
of 5” w.c. and a maximum of 13” w.c. If inlet natural 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.
E. Boiler(s) shall have I=B=R Hydronics Institute gross output(s) at 100% firing
rate __________ MBH per boiler.
F. Boiler(s) shall be 80% minimum DOE efficient as required by National
Appliance Energy Conservation Act or ASHRAE 90.1.
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. 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.
H. Regulatory Requirements
1. Boiler(s) and controls to comply with applicable regulations.
2. Add option for local codes, i.e. Mass. Code, BAR.
I. Boilers shall have a 10-year non-prorated warranty as outlined in written
warranty.
PFG SERIES BOILER
SUGGESTED SPECIFICATIONS

Weil-McLain PFG SERIES Specifications

General

Fuel Type	Natural Gas or Propane
AFUE	95%
Ignition Type	Direct Spark Ignition
Heat Exchanger Material	Stainless Steel
Hydronic Connections	1-1/4" NPT

Summary

General Requirements

Boiler Furnish and Installation

Specifies quantity and type of packaged atmospheric gas cast iron sectional boiler(s) to be furnished and installed.

Installation Standards

Requires installation according to manufacturer's instructions, performed neatly and in a workmanlike manner.

Boiler Model and Fuel Specification

Details specific Weil-McLain PFG model, size, and capability for burning natural gas (propane option).

Natural Gas Pressure Requirements

Sets inlet natural gas pressure range (5"-13" w.c.) and requires a lock-up type gas pressure regulator if needed.

Boiler Output and Efficiency

Specifies I=B=R gross output requirement and 80% minimum DOE energy efficiency.

Manufacturing and ASME Compliance

Requires ISO 9001 registration, hydrostatic testing, and ASME Code Section IV compliance with 50 PSIG max working pressure.

Regulatory and Code Compliance

Ensures boiler and controls comply with applicable regulations and local codes.

Boiler Warranty

Mandates a 10-year non-prorated warranty for the boilers.

Product Specifications

Acceptable Boiler Manufacturers

Lists Weil-McLain as acceptable, or other manufacturers meeting specific requirements and submittal procedures.

Boiler Construction Details

Details boiler section assembly with draw rods, sealing grooves, and tappings for controls.

Boiler Water Flow and Air Elimination

Requires cast-in air elimination, expansion tank tapping, and balanced water flow via single connections.

Boiler Foundation Requirements

Specifies installer responsibility for foundations and minimum 18" burner elevation in garages.

Water Boiler Controls

Lists furnished controls including high limit temp control, pressure-temperature gauge, and ASME relief valve.

Boiler Manuals and Documentation

Required Boiler Manuals

Specifies provision of complete instruction manuals, including Installation, User's, and Gas Control Supplements.