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

2
II. Product
I. Acceptable boiler manufacturer(s) include(s);
1. Weil-McLain only, 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, and
b) Provide complete submittal including literature, manuals, 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
area.
c) Submittal presented to engineer at least seven working days
before bid opening for approval. Substitutions are not
permitted after contract is awarded.
3. Energy Management Control System(s) must be tested and approved
for installation with specified boiler by boiler manufacturer.
J. Boiler Construction
1. Boiler sections
a) Assembled with draw rods.
b) Made with sealing grooves for high temperature cope seal and
silicone sealant to assure permanent gas-tight seal.
c) 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.
No external headers are necessary.
K. Boiler Foundation(s)
1. Installer to construct needed support and level concrete boiler
foundation(s) where boiler room floor is uneven or will not support
weight of boiler(s).
2. Boiler(s) installed in a residential garage shall be installed so the
burners are at least 18” above the floor.
L. Boiler Trim
1. All electrical components to be high quality manufacture and bear UL
label.
2. Water boiler(s) controls furnished:
a) High limit temperature control (240º F maximum allowable
boiler water temperature.
b) Combination pressure-temperature gauge. Gauge dial clearly
marked and easy to read.

3
c) ASME certified pressure relief valve, set to relieve at 30 PSIG.
Optional relief valves available up to and including maximum
allowable working pressure. Side outlet discharge type;
contractor to pipe outlet to floor drain or near floor, not to any
area where freezing could occur.
M. Boiler Manuals
1. The boiler(s) shall be provided with complete instruction manuals,
including:
a) Installation Manual
b) User’s Manual
c) Gas Control Supplements
Weil-McLain
500 Blaine Street
Michigan City, IN 46360-2388
http://www.weil-mclain.com
C-811(699)