Burnham SCG-3 User manual

High Efficiency Direct Vent & Sealed Combustion
Cast Iron Water Boilers
• 85+% AFUE (5 sizes)
ENERGY STAR®Certified
• 70 to 280 MBH in 7 Sizes
•Rugged Cast Iron Sectional Design
•Natural or LP Gas
• PVG - Power Vented
SCG - Sealed Combustion Venting
• Limited Lifetime Warranty
The Ultimate Combination
of Efficiency and Value!
PVG &SCG

Unbeatable Efficiency & Value!
Burnham’s PVG & SCG boilers offer a unique combination of high efficiency and value to
homeowners. Available in direct vent (PVG) or sealed combustion (SCG) both models utilize either
3 or 4-inch stainless steel vent pipe to direct the flue products out of the building. This eliminates
the need to install a liner in an existing chimney – which is often a major expense when replacing
an older boiler.
PVG and SCG series boilers are simple to install, and require very little service and maintenance
–especially compared to higher-efficiency condensing boilers. This can save homeowners hundreds
of dollars in up-front installation costs, as well as several hundred dollars a year in maintenance
and tune-up’s. Factoring in installation, annual service, and fuel usage - over time the operating
costs of the SCG and PVG may be well below those of condensing boilers. While low temperature
radiant heat systems are becoming more popular in newer buildings, many still utilize baseboard
heat, convectors, air handlers. & indirect water heaters - which generally require higher water
temperatures. Cast iron boilers are the best choice for these applications. The PVG and SCG deliver
the winning combination of efficiency and durability in high-temp heating applications.
Reliable Cast Iron Heat Exchanger
PVG & SCG boilers have rugged cast iron heat exchanger sections
that are poured in Burnham’s own state-of-the-art foundry in
Zanesville, Ohio. This means that Burnham is able to control the
quality of this vital component from the time that it’s poured to the
time that it’s installed and tested in the boiler. The heat exchanger
itself is designed for efficiency. Round pins on the outside of the
exchanger increase the surface area which increases heat transfer.
Inside, dimpled waterways promote turbulence as water flows
through the castings. This helps to thoroughly mix cooler return water with the water inside
the heat exchanger. As a result, PVG and SCG boilers are more resistant to thermal shock and
condensation than other comparable boilers. Steel nipples are used to join sections together. This
vital component is impervious to petroleum-based chemicals (like antifreeze) which can break
down the rubber gaskets that are used by competitors.
A Better Burner Base
The burner base in the PVG & SCG has been engineered
to deliver on Burnham’s ongoing commitment to safety,
reliability, and durability. Underneath it’s simple two piece
design sits stainless steel burner tubes which are secured
by lock-in burner slots. A 1/4” pilot tube provides an
ample flow of gas which contributes to reliable burner
performance. An isolated combustion area beneath
the burner tubes optimizes airflow and keeps floor
temperatures low beneath the boiler. The combustion
chamber itself is lined with thick 1” insulation on the sides
and 1-1/2” insulation on the rear. This keeps the heat
generated in combustion directed upward toward the heat
exchanger, not out into the boiler jacket and surrounding area.
Safety Without Compromise
Burnham’s reputation for building safe products is an ongoing commitment that is taken very seriously.
Many additional safety features have been built into the PVG & SCG.
• Blocked Vent Switch
Safely shuts the boiler down if a chimney or vent blockage is detected.
• Flame roll-out switch
If an internal flueway restriction is detected, this device will automatically stop
the flow of gas to prevent combustion gases from seeping into the home.
• Concealed Controls
All boiler controls are safely hidden under the jacket to prevent damage & tampering.
High Efficiency Direct Vent and Sealed Combustion Cast Iron Water Boilers
PVG &SCG
Thick Insulation
Lock-in
Burner Slots
Isolated Combustion Area

PVG & SCG Boilers
Burnham Alliance SL™
Indirect-fired Water Heaters
For an abundant supply of domestic hot water,
be sure to use an Burnham Alliance SL indirect-
fired water heater with every boiler application.
The Alliance SL water heaters are designed
with an effective hydrastone lining that offers
superior corrosion resistance and outstanding
performance in a wide variety of water
conditions.
Water heaters are available in five sizes and come with a unique
10/2/1 warranty – 10 years on the tank and coil, 2 years labor and
1 year on parts. An optional lifetime warranty is also available.
High quality, reliable controls
are safely concealed inside the
boiler jacket.
Reliable Controls
These high strength
legs & glides allow
for easy positioning
of the boiler, and protect against
potential damage to flooring.
1” Insulation
This type of gas valve enables
the boiler to start on low fire
and continue on to high fire
safely and smoothly. This
provides quiet ignition and
promotes long boiler life.
Step Opening Gas
Valve
Surrounds boiler block which
reduces heat loss through the
boiler jacket.
Trapezoidal Legs with
Nylon Glides
Burnham backs the
PVG & SCG with a limited
lifetime warranty on the heat
exchanger. Additional coverage is
available by purchasing the Winter
Warmth Assurance Plan, which
provides extended protection on
parts and labor for 5 or 10 years.
from the date of installation.
Limited Lifetime
Warranty
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BURNHAM
Tough powder
coated steel
jacket designed
for durability.
Rugged Jacket
Plug-in wiring harnesses
for installation of LWCO
and auxiliary high limit are
accessible and clearly labeled.
“Plug & Play”
Component Installation
Contractor-Friendly
Design
High mounted control
panel, easy access to fan,
simple field conversion
kit available for LP
applications.

© 2008 U.S. Boiler Company, Inc. - Lancaster, PA
Phone: [phone]
www.burnham.com Printed in the U.S.A.
Form No. PL81401051001-11/08-20Ms
Ratings
Specifications
Model
Number Input
DOE
Heating Capacity (MBH) I=B=R Water Ratings AFUE%
SCG3 / PVG3 70 60 52 85.5
SCG4 / PVG4 105 90 78 85.4
SCG5 / PVG5 140 120 104 85.3
SCG6 / PVG6 175 150 130 85.2
SCG7 / PVG7 210 179 156 85.0
SCG8 / PVG8 245 208 181 84.5*
SCG9 / PVG9 280 238 207 84.0*
Model
Number
Dimensions (inches) Connections (inches) Water
Content (gal.)
Approximate
Shipping Weight (lbs.)‘A’ ‘B’ ‘C’ Vent Air Intake
SCG3 / PVG3 11.65 26.60 38.09 3 3 2.16 210
SCG4 / PVG4 14.72 26.60 38.09 3 3 3.00 254
SCG5 / PVG5 17.78 26.60 38.09 3 4 3.84 298
SCG6 / PVG6 20.84 26.60 38.09 3 4 4.68 342
SCG7 / PVG7 23.90 26.60 38.09 3 5 5.52 386
SCG8 / PVG8 26.97 26.60 38.09 4 5 6.36 430
SCG9 / PVG9 30.03 26.60 38.09 4 5 7.20 474
SCG Model shown with vent connection
*Only SCG3/PVG3 through SCG7/PVG7 are ENERGY STAR certified at 85+% AFUE
(3/4” NPT)
(1-1/4” NPT)
(1-1/4” NPT)