Boiler Buddy BB-30, BB-50-G, BB-18, BB-80-3W, BB-119-3W Installation Manual

Installation Manual

Aquastat wells
provided for
monitoring and
controlling tank
temperature

Closed­cell foam
insulation
provides low
standby loss

Large tank
connections
accommodate
ow rates
required by
low mass
equipment

A division of:

REV. 11/17

www.BoilerBuddy.com

Boiler Buddy® Installation Manual

Technical information contained in this publication is for reference purposes only and is subject to
change without notice. Every eort has been made to supply complete and accurate information;
however, Hot Water Products assumes no responsibility and will not be liable for any errors, omissions,
damage, or loss that might result from any use of this manual or the information contained therein.

Reference to System Congurations and Specications supercede all previous information and are
subject to change without notice.

Boiler Buddy® is a registered trademark of Hot Water Products, Inc.

Table of Contents

Overview . . . . . . . . . . . . . . . . . . . . 1

Specifications . . . . . . . . . . . . . . . . . 2

BB-80-C Specifications Page . . . . . . . . . . . . 3

Concept Drawings / Schematics

BB-18 | BB-30 with Boiler . . . . . . . . . . . . 4

BB-30 with Boiler & Indirect Water Heater . . . . . 5

BB-30 with Boiler & Indirect Multi-Temp . . . . . . 6

BB-50-G with Geo-Thermal . . . . . . . . . . . 7

BB-80-3W with Two Boilers & Indirect . . . . . . . 8

BB-80-C with Boiler & Wood Boiler . . . . . . . . 9

BB-80-C with Geo-Thermal & Boiler Back-Up . . . . 10

BB-80-C with Boiler & Solar . . . . . . . . . . . 11

BB-119-3W with Geo-Thermal . . . . . . . . . . 12

1 | Boiler Buddy® Installation Manual

Boiler Buddy® Buer Tank

Models: BB-18, BB-30, BB-50-G, BB-80-3W, BB-80-C & BB-119-3W

• The BB-18 and BB-30 come with 1 aquastat well.

• The BB-50-G, BB-80-3W, and BB-119-3W come with 3 aquastat wells.

• The BB-80-C comes with an internal heat exchanger coil and 1 aquastat well.

The Boiler Buddy is available
in 18, 30, 80, 50 and 119 gallon
capacities. It is designed to be
used in heating systems with
low-mass boilers, geothermal,
chilled water applications, or
low-mass radiation. Boilers
operating at low loads may
short cycle which can lead to
sooting, premature component
failure (nuisance lockouts) and
ineciency.

The Boiler Buddy tank is a
factory insulated (polyurethane
foam) and jacketed storage tank,
adding mass to the system and
providing the necessary buer

to prevent short cycling. If the
boiler ring cycle is extended for
a minimum of several minutes,
the full eciency of the boiler
can be achieved and nuisance
problems can be avoided.

The Boiler Buddy also creates
a low velocity state within
the system, providing air
elimination, assisting in the
removal of sediment and
debris, and acting as a hydraulic
separator between required
ows from the boiler(s) and the
multiple ow rates needed for
the secondary zones. The ball
drain for sediment removal also

acts as an excellent way to fast
ll the system.

Excessive draining from
the Boiler Buddy is not
recommended, as it introduces
more contaminants into the
system. Routine maintenance
of the closed-loop system
should be performed
once per year, or sooner
as per boiler manufacturer
recommendations.

Note: Boiler Buddy buer tanks
are not for use with potable
water!

REV. 7/16 | 2

All Boiler Buddy tanks utilize
polyurethane foam insulation
which can help reduce energy
loss by restricting heat and cold
inltration.

Boiler Buddy Tanks include the following:

• Premium high capacity air
eliminator

• Brass hose bushing

• All necessary nipples

• Premium Webstone ball
drain with cap

• Brass aquastat well(s) (dry)

It also greatly enhances structural
integrity and retards water and
moisture, thereby increasing the
longevity of the tank.

! WARNING !

Boiler Buddy buer tanks are NOT

suitable for non-oxygen barrier

tubing.

NOT suitable for potable water.

3 | Boiler Buddy® Installation Manual

Model: BB-80-C

The BB-80-C is the only Boiler Buddy model that comes with an internal carbon steel heat exchange
coil. This feature allows for exibility in system design. Design applications include; hydronic buer
tank/heat supplemented by solar, geothermal, wood boiler, pellet stove, waste oil burner, etc.

Carbon steel coil is 36’ long, 14.4 ft and furnished with 1” NPT connections.

! WARNING !

The internal coil in

the BB-C tank is

made of carbon steel.

This must only be

connected to closed-

loop, pressurized

systems with air

elimination!

NOT suitable for

potable water!

REV. 7/16 | 4

Boiler connections to the Boiler Buddy should be made as illustrated in the following piping diagrams. If
the boiler connections are reversed, the system supply temperature could be tempered within the tank.
To achieve maximum set point, feed the boiler supply into the top tapping.

Drawing is meant to show system piping
concepts only. Installing contractor is
responsible for all equipment and detailing
required by local codes.

5 | Boiler Buddy® Installation Manual

Drawing is meant to show system piping
concepts only. Installing contractor is
responsible for all equipment and detailing
required by local codes.

REV. 7/16 | 6

Drawing is meant to show system piping
concepts only. Installing contractor is
responsible for all equipment and detailing
required by local codes.

7 | Boiler Buddy® Installation Manual

Drawing is meant to show system piping
concepts only. Installing contractor is
responsible for all equipment and detailing
required by local codes.

REV. 7/16 | 8

Drawing is meant to show system piping
concepts only. Installing contractor is
responsible for all equipment and detailing
required by local codes.

9 | Boiler Buddy® Installation Manual

! WARNING !

The internal coil in the BB-80-C tank

is made of carbon steel. This must only

be connected to closed-loop, pressur-

ized systems with air elimination!

Boiler Buddy Tank NOT suitable for

potable water!

Drawing is meant to show system piping
concepts only. Installing contractor is
responsible for all equipment and detailing
required by local codes.

REV. 7/16 | 10

! WARNING !

The internal coil in the BB-80-C tank is

made of carbon steel. This must only be

connected to closed-loop, pressurized

systems with air elimination!

Boiler Buddy Tank NOT suitable for

potable water!

Drawing is meant to show system piping
concepts only. Installing contractor is
responsible for all equipment and detailing
required by local codes.

11 | Boiler Buddy® Installation Manual

! WARNING !

The internal coil in the BB-80-C tank is

made of carbon steel. This must only be

connected to closed-loop, pressurized

systems with air elimination!

Boiler Buddy Tank NOT suitable for

potable water!

Drawing is meant to show system piping
concepts only. Installing contractor is
responsible for all equipment and detailing
required by local codes.

REV. 7/16 | 12

Drawing is meant to show system piping
concepts only. Installing contractor is
responsible for all equipment and detailing
required by local codes.

Hot Water Products, Inc. · 7500 N. 81st Street, Milwaukee, WI 53223 · Toll-free: 877 377•0011 · Fax: 877 280•0022 · www.BoilerBuddy.com

©2014 Hot Water Products, Inc. We reserve the right to make product changes without notice and will not be held liable for typographical errors in
literature. Boiler Buddy® is a registered trademark of Hot Water Products, Inc. Rev. 11/17.

A division of: