Bradford White BRHHH User manual

Installation and Operation Instructions Docyment 1246
H2343400-
Modulating Boiler
Model BRHHH
Modulating Water Heater
Model BRHHV
U.S. Patent No. 6,644,393
Canada Patent Pending
WARNING
If the information in this manual is not
followed exactly, a fire or explosion may
result causing property damage, personal
injury or loss of life.
Do not store or use gasoline or other
flammable vapors and liquids in the vicinity
of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
nearby phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call
the fire department.
Installation and service must be performed
by a qualified installer, service agency, or gas
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualified in hot water boiler and heater installation and maintenance. Improper installation and/or
operation could create carbon monoxide gas in flue gases which could cause serious injury, property
damage, or death. Improper installation and/or operation will void the warranty.
AVERTISSEMENT
Assurez-vous de bien suivres les instructions
données dans cette notice pour réduire au
minimum le risque d’incendie ou d’explosion
ou pour éviter tout dommage matériel, toute
blessure ou la mort.
Ne pas entreposer ni utiliser d’essence ni
d’autres vapeurs ou liquides inflammables dans
le voisinage de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:
• Ne pas tenter d’allumer d’appareils.
• Ne touchez à aucun interrupteur. Ne pas vous
servir des téléphones dansle bâtiment où vous
vous trouvez.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le service des incendies.
L’installation et l’entretien doivent être assurés par
un installateur ou un service d’entretien qualifié ou
par le fournisseur de gaz.
Installation and Operation
Instructions for
BRUTE MAGNUM
238-49223-00A REV 4/11

BRADFORD WHITE CORP.
Page 2

Brute Magnum Page 3
Table of Contents
SECTION 1
General Information
1.1 Introduction...................................................... 5
1.2 Model Identification.......................................... 5
1.3 Warranty .......................................................... 6
1.4 Dimensions...................................................... 6
1.5 Locating the Appliance..................................... 6
1.6 Locating Pump-Mounted Water
Heater with Respect to Storage Tank(s).......... 6
1.7 Locating Pump-Mounted Boiler with
Respect to Return/Supply Header................... 6
1.8 Locating Appliance for Correct Vent Distance
From Outside Wall or Roof Termination........... 7
SECTION 2
Venting and Combustion Air
2.1 Combustion Air ................................................ 8
2.1.1 Combustion Air From Room ............................ 8
2.1.2 Intake Combustion Air...................................... 8
2.2 Venting............................................................. 9
2.3 Locating Vent & Combustion Air Terminals...... 9
2.3.1 Horizontal Vent Terminal.................................. 9
2.3.2 Side Wall Combustion Air Terminal................ 12
2.3.3 Vertical Vent Terminal .................................... 12
2.3.4 Vertical Combustion Air Terminal ................... 12
2.4 Common Vent Test – Boilers ......................... 12
SECTION 3
Gas Supply and Piping
3.1 Gas Supply and Piping .................................. 13
SECTION 4A
Water Connections – BRHHH Boiler
4A.1 Heating System Piping:
Hot Supply Connections – Boiler................... 14
4A.2 Cold Water Make-Up – Boiler ........................ 14
4A.3 Freeze Protection – Boiler ............................. 15
SECTION 4B
Water Connections – BRHHV Water Heater
4B.1 Water System Piping – Water Heater ............ 15
4B.2 Hot Water Supply Piping – Water Heater ...... 15
4B.3 Water Flow Requirements – Water Heater .... 16
4B.4 Combined Water (potable)
Heating and Space Heating........................... 18
4B.5 Freeze Protection — Water Heater ............... 19
SECTION 5
Electrical Connections
5.1 Main Power.................................................... 24
5.2 Pump Connections ........................................ 24
5.3 Temperature Control – Boiler......................... 24
5.4 Temperature Control – Water Heater............. 24
5.4.1 Remote Water Heater Temperature Control .. 24
5.4.2 Internal Water Heater Temperature Control... 25
5.5 Temperature Control Features....................... 25
5.5.1 Temperature Setpoint .................................... 25
5.5.2 Differential Setting ......................................... 25
5.5.3 Offset ............................................................. 26
5.5.4 Throttling Range ............................................ 26
5.5.5 Minimum Output Setting ................................ 27
5.5.6 Integration Constant ...................................... 27
5.6 Mixing System and Control............................ 28
5.7 External Control Connections........................ 29
5.8 Wiring Diagrams ............................................ 29
SECTION 6
Operating Instructions
6.1 Filling the Boiler System ................................ 36
6.2 Operating the Burner and Set Up .................. 36
6.3 Shutting Down the Brute Magnum................. 38
6.4 To Restart the Brute Magnum........................ 38
SECTION 7
Maintenance
7.1 System Maintenance ..................................... 38
7.2 Appliance Maintenance and
Component Description ................................. 38
7.2.1 Burner............................................................ 40
7.2.2 Filter............................................................... 40
7.2.3 Modulating Gas Valve.................................... 40
7.2.4 Safety Gas Valve ........................................... 41
7.2.5 Manual Reset High Limit Control................... 41
7.2.6 Temperature Control...................................... 41
7.2.7 Auto Reset Temperature Limit ....................... 41
7.2.8 Mixing Control................................................ 41
7.2.9 Mixing Valves................................................. 41
7.2.10 Mixing Actuator .............................................. 42
7.2.11 Ignition Control............................................... 42
7.2.12 Ignitor / Flame Sensor Assembly ................... 42
7.2.13 Transformers ................................................. 42
7.2.14 Blower............................................................ 42
7.2.15 Flow Switch.................................................... 42
7.2.16 Heat Exchanger Coils .................................... 42
7.2.17 Normally Open Vent Valve............................. 43
7.2.18 Motorized Safety Valve .................................. 43
7.2.19 Gas Pressure Switches ................................. 43
SECTION 8
Troubleshooting
8.1 Sequence of Operation.................................. 43
8.2 Resolving Lockouts........................................ 44
8.3 Delayed Ignition – Possible Causes .............. 44
8.3.1 High Lockup Pressure (LP Appliances)
- Occurs on Start-up ...................................... 44
8.3.2 Gas Valve Regulation .................................... 44
8.3.3 Defective Burner - Occurs on
Startup or at Burner Shutdown ...................... 44
8.4 Short Cycling – Boiler .................................... 44
8.5 Short Cycling – Water Heater ........................ 45
8.6 High Gas Consumption.................................. 45
SECTION 9
Replacement Parts
9.1 General Information....................................... 45
9.2 Parts List........................................................ 45

BRADFORD WHITE CORP.
Page 4
Table 1 Clearances ........................................................6
Table 2 Vent / Air Pipe Sizes ..........................................7
Table 3 Horizontal Vent and Air Terminals
for Indoor Installations....................................... 8
Figure 1 Dimensional Drawing ........................................7
Figure 2 Combustion Air and Vent Through Roof............8
Figure 3 Combustion Air and Vent Through Side-Wall .. 10
Figure 4 Hydronic Piping – Multiple Boilers...................16
Figure 5 Hydronic Piping – Multiple Boilers (Alternate). 17
Figure 6 Hydronic Piping – One Boiler,
Multi-Temperature System ..............................18
Figure 7 Internal Piping Schematic................................19
Figure 8 Water Heater Piping – One Heater, One Tank .... 20
Figure 9 Water Heater Piping – Multiple Heaters,
One Tank .........................................................21
Figure 10 Water Heater Piping – One Heater,
Multiple Tanks..................................................22
Figure 11 Water Heater Piping – Multiple Heaters,
Multiple Tanks..................................................23
Figure 12 Temperature Control........................................24
Figure 13 Proprotional Control ........................................25
Figure 14 Control Parameter Graph................................ 26
Figure 15 Control Parameter Graph................................ 27
Figure 16 Control Parameter Possible Interference ........28
Figure 17 Wiring Diagram, Size 1200,
Standard and Codes A and F ..........................30
Figure 18 Wiring Diagram, Sizes 1600, 2000 and
2400, Standard and Codes A and F ................31
List of Tables
Table 4 Required Combustion Air Piping Material.......... 9
Table 5 Required Venting Material .................................9
Table 6 Gas Piping Sizes............................................. 13
Table 7 Air & Gas Orifice Differentials at Full Fire........38
List of Figures
Figure 19 Wiring Diagram Size 1200, Code B.................32
Figure 20 Wiring Diagram, Sizess 1600, 2000 and
2400, Code B ..................................................33
Figure 21 Wiring Schematic, Size 1200,
Standard and Codes A and F ..........................34
Figure 22 Wiring Schematic, Sizes 1600, 2000 and
2400, Standard and Codes A and F ................34
Figure 23 Wiring Schematic, Size 1200, Code B ............ 35
Figure 24 Wiring Schematic, Sizes 1600, 2000 and
2400, Code B ..................................................35
Figure 25 Gas/Air Test Panel...........................................37
Figure 26 Test Panel Valves ............................................ 37
Figure 27 Gas Trains.......................................................39
Figure 28 Gas Trains.......................................................40
Figure 29 Control Panel...................................................41
Figure 30 Combustion Components................................49
Figure 31 Gas Train/Combustion Air Components..........50
Figure 32 Gas Train Components ...................................51
Figure 33 Electrical Components ....................................52
Figure 34 Heat Exchanger / Water Path Components ....53
Figure 35 Heat Exchanger / Water Path Components ....54
Figure 36 Jacket Components.........................................55

Brute Magnum Page 5
Section 1
GENERAL INFORMATION
USING THIS MANUAL – Because the Brute
Magnum Boilers and Brute Magnum Water
Heaters are identical appliances, with the exception
of materials of manufacture, labels and ultimate
use application, this manual provides information
for the proper installation, operation and
maintenance of both products. Where differences
exist between the application of the appliances and
their operation, the sections pertinent to only one
appliance or the other will be so identified.
WARNING
The Brute Magnum hydronic, boiler or water
heater must be installed in accordance with the
procedures detailed in this manual, or the Bradford
White warranty will be voided. The installation must
conform to the requirements of the local jurisdiction
having authority, and, in the United States, to the
latest edition of the National Fuel Gas Code, ANSI
Z223.1/NFPA54. In Canada, the installation must
conform to the latest edition of CSA B149.1 Natural
Gas and Propane Gas Installation Code, and/
or local codes. Where required by the authority
having jurisdiction, the installation of Brute Magnum
boilers must conform to the Standard for Controls
and Safety Devices for Automatically Fired Boilers,
ANSI/ASME CSD-1. Any modifications to the boiler,
its gas controls, or wiring may void the warranty.
If field conditions require modifications, consult
the factory representative before initiating such
modifications.
1.1 Introduction
This manual provides information necessary
for the installation, operation, and maintenance of
Bradford White Brute Magnum (copper tube or
cupronickel tubes) appliances. Read it carefully before
installation.
All application and installation procedures should
be reviewed completely before proceeding with the
installation. Consult the Bradford White factory, or
local factory representative, with any problems or
questions regarding this equipment. Experience has
shown that most operating problems are caused by
improper installation.
The Brute Magnum appliance is protected
against over pressurization. A pressure relief valve is
fitted to all appliances. It is installed inside the jacket,
at the water outlet of the unit. (See Sections 4A and 4B
for instructions on how to install a relief valve outlet.)
IMPORTANT: The inlet gas pressure to the appliance
must not exceed 13" W.C. (3.2kPa).
All installations must be made in accordance
with 1) American National Standard Z223.1/NFPA54-
Latest Edition “National Fuel Gas Code” or 2) CSA
B149.1 “Natural Gas and Propane Installation Code”
and with the requirement of the local utility or other
authorities having jurisdiction. Such applicable
requirements take precedence over the general
instructions contained herein.
All electrical wiring is to be done in accordance
with the local codes, or in the absence of local codes,
with: 1) The National Electrical Code ANSI/NFPA No.
70-latest Edition, or 2) CSA STD. C22.1 “Canadian
Electrical Code - Part 1”. This appliance must be
electrically grounded in accordance with these codes.
1.2 Model Identification
Consult the rating plate on the unit. The
following information describes the model number
structure.
(1-3) Model Series Designation
B R H = Brute Magnum mid-sized commercial
(3) Model Efficiency
H = High Efficiency (condensing)
(4) Usage
H = Hydronic
V = Volume Water
(5-8) Size
1 2 0 0 = 1,200,000 BTU/hr input
1 6 0 0 = 1,600,000 BTU/hr input
2 0 0 0 = 2,000,000 BTU/hr input
2 4 0 0 = 2,400,000 BTU/hr input
(9) Fuel
N = Natural Gas
P = Liquid Propane
(10) Altitude
A = Universal Altitude (0' – 10,000') (0m – 3050m)
(11) Location
I = Indoor
(12) Firing Mode
F = Modulating
Model Designation
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
B R H H 0 0 A I F
SERIES
R H H
USAGE
H
V
SIZE
1 2 0 0
1 6 0 0
2 0 0 0
2 4 0 0
FUEL
N
P
ALTITUDE
A
FIRING
MODE
F
LOCATION
I
REVISION
1
2
HEAT
EXCHANGER
E
F
OPTIONS
X
A
B
F
PUMP
N
H

BRADFORD WHITE CORP.
Page 6
(13) Revision
2 = Second version
(14) Heat Exchanger
E = Glass-lined steel with copper tubes
F = Glass-lined steel with cupronickel tubes
(15) Control Option Code
X = Standard, meets CSD-1 boiler standard
A = Control Pack A: CSD-1, CA, FM, IL, IRI,
Alarm Bell
B = Control Pack B: CSD-1, CA, FM, IL, LDS, MN
F = Non CSD-1
(16) Pump Options
N = Pump mounted, normal pump (standard)
H = Pump mounted, hard water pump (BRHHV)
1.3 Warranty
Bradford White’s Brute Magnum appliances
are covered by a limited warranty. The owner should
fill out the warranty registration card and return it to
Bradford White.
All warranty claims must be made to an
authorized Bradford White representative or directly
to the factory. Claims must include the serial number
and model (this information can be found on the rating
plate), installation date, and name of the installer.
Shipping costs are not included in the warranty
coverage.
Some accessory items are shipped in separate
packages. Verify receipt of all packages listed on
the packing slip. Inspect everything for damage
immediately upon delivery, and advise the carrier of
any shortages or damage. Any such claims should be
filed with the carrier. The carrier, not the shipper, is
responsible for shortages and damage to the shipment
whether visible or concealed.
1.4 Dimensions
The overall dimensions are 34.5" (88cm)
wide, 65.75" (167cm) tall, 55" (140cm) deep. Other
dimensions can be found in Figure 1.
1.5 Locating the Appliance
The Brute Magnum is for indoor installations
only.
The appliance should be located to provide
clearances on all sides for maintenance and inspection.
It should not be located in an area where leakage of
any connections will result in damage to the area
adjacent to the appliance or to lower floors of the
structure.
When such a location is not available, it is
recommended that a suitable drain pan, adequately
drained, be installed under the appliance.
The appliance is design certified by CSA-
International for installation on combustible flooring;
in basements; in closets, utility rooms or alcoves.
Brute Magnum Boilers or Water Heaters must
never be installed on carpeting. The location for the
appliance should be chosen with regard to the vent
pipe lengths and external plumbing. The unit shall be
installed such that the gas ignition system components
are protected from water (dripping, spraying, rain, etc.)
during operation and service (circulator replacement,
control replacement, etc.). When vented vertically, the
Brute Magnum must be located as close as practical
to a chimney or gas vent. If the vent terminal and/
or combustion air terminal terminate through a wall,
and there is potential for snow accumulation in the
local area, both terminals should be installed at an
appropriate level above grade.
The dimensions and requirements that are shown
in Table 1 should be met when choosing the locations
for the appliance:
Appliance Clearance From Suggested Service
Surface Combustible Material Clearance
inches inches
Piping Side 1 18
Opposite Side 1 1
Top 1 24
Back 1 36
Front 1 36
Vent per UL1738 venting
system supplier’s
instructions
Table 1. Clearances.
1.6 Locating Pump-Mounted Water Heater
with Respect to Storage Tank(s)
For best results the Brute Magnum water heater
should be located within 15 feet (4.6m) of the storage
tank(s). The pump is sized for 30 feet (9.1m) of piping.
Water heater pumps are sized for water hardness;
7.6 to 17 grains per gallon for normal water, greater
than 17 grains per gallon for hard water, and 1 to
7.5 grains per gallon for soft water. If the appliance
must be installed with longer piping runs, then larger
diameter pipe or tubing may be able to be used, in
some instances. Consult the factory for assistance.
1.7 Locating Pump-Mounted Boiler with
Respect to Return/Supply Header
Brute Magnum units must be piped in primary-
secondary fashion because of the internal pump and
mixing system.
For the best results the Brute Magnum Boiler
should be located within 15 feet (4.6m) of the supply
and return headers. The pump is sized for 30 feet
(9.1m) of piping, in most cases, enough for primary-
secondary piping systems.
If the appliance must be installed with longer piping
runs, then larger diameter tubing may be able to be used,
in some instances. Consult the factory for assistance.

Brute Magnum Page 7
Figure 1. Dimensional Drawing.
Size Intake Exhaust Intake Exhaust
Size Size Maximum Run Maximum Run
1200 6" (15 cm) dia. 6" (15 cm) dia. 50 linear feet with 5 elbows 50 linear feet with 5 elbows
1600 8" (20 cm) dia. 6" (15 cm) dia. 50 linear feet with 5 elbows 50 linear feet with 5 elbows
2000 8" (20 cm) dia. 7" (18 cm) dia. 50 linear feet with 5 elbows 50 linear feet with 5 elbows
2400 8" (20 cm) dia. 10" (25 cm) dia. 50 linear feet with 5 elbows 50 linear feet with 5 elbows
Table 2. Vent / Air Pipe Sizes.
1.8 Locating Appliance for Correct Vent
Distance From Outside Wall or
Roof Termination
The forced draft combustion air blower in the
appliance has sufficient power to vent properly when
the guidelines in Table 2 are followed.
NOTE: When located on the same wall, the Brute
Magnum combustion air intake terminal must be
installed a minimum of 12" (30cm) below the exhaust
vent terminal and separated by a minimum of
36 inches (91cm) horizontally.
Size
“V”
Vent Outlet
Connection
“A”
Air Inlet
Connection
“W”
Water
Inlet/ Outlet
Connection
“G” Gas Connects.
Control Packages
“B”
Std & A
Nat/ LP
B & E
Nat
B & E
LP
inches inches NPT NPT NPT NPT inches
1200 6 6 2-1/2” 1’ 1-1/2’ 1-1/2” 34-1/4”
1600 6 8 2-1/2” 1-1/2’ 2” 2’ 34-1/4”
2000 7 8 3” 1-1/2’ 2” 2” 34-1/4”
2400 10 8 3” 1-1/2” 2” 2” 32”

BRADFORD WHITE CORP.
Page 8
2.1.2 Intake Combustion Air
The combustion air can be taken through the
wall, or through the roof. When taken from the wall,
it must be taken from out-of-doors by means of the
horizontal wall terminal, shown in Table 3. See Table 2
to select the appropriate diameter air pipe. When taken
from the roof, a field-supplied rain cap or an elbow
arrangement must be used to prevent entry of rain
water (see Figure 2).
Section 2
VENTING AND COMBUSTION AIR
2.1 Combustion Air
Brute Magnum boilers and water heaters must
have provisions for combustion and ventilation
air in accordance with the applicable requirements
for Combustion Air Supply and Ventilation in the
National Fuel Gas Code, ANSI Z223 1; or in Canada,
the Natural Gas and Propane Installation Code, CSA
B149.1. All applicable provisions of local building
codes must also be adhered to.
A Brute Magnum unit can take combustion
air from the space in which it is installed, or the
combustion air can be ducted directly to the unit.
Ventilation air must be provided in either case.
2.1.1 Combustion Air From Room
In the United States, the most common
requirements specify that the space shall communicate
with the outdoors in accordance with method 1 or 2,
which follow. Where ducts are used, they shall be of
the same cross-sectional area as the free area of the
openings to which they connect.
Method 1: Two permanent openings, one
commencing within 12" (300mm) of the top and one
commencing within 12" (300mm) of the bottom, of
the enclosure shall be provided. The openings shall
communicate directly, or by ducts, with the outdoors
or spaces that freely communicate with the outdoors.
When directly communicating with the outdoors, or
when communicating to the outdoors through vertical
ducts, each opening shall have a minimum free area of
1 square inch per 4000 Btu/hr (550 square mm/kW) of
total input rating of all equipment in the enclosure. When
communicating to the outdoors through horizontal ducts,
each opening shall have a minimum free area of not less
than 1square inch per 2000 Btu/hr (1100 square mm/kW)
of total input rating of all equipment in the enclosure.
Method 2: One permanent opening, commencing
within 12" (300mm) of the top of the enclosure, shall
be permitted. The opening shall directly communicate
with the outdoors or shall communicate through a
vertical or horizontal duct to the outdoors or spaces
that directly communicate with the outdoors and shall
have a minimum free area of 1 square inch per 3000
Btu/hr (734 square mm/kW) of the total input rating of
all equipment located in the enclosure. This opening
must not be less than the sum of the areas of all vent
connectors in the confined space.
Other methods of introducing combustion and
ventilation air are acceptable, providing they conform
to the requirements in the applicable codes listed
above.
In Canada, consult local building and safety
codes or, in absence of such requirements, follow
CAN/CGA B149.
Figure 2. Combustion Air and Vent Through Roof.
Use single-wall galvanized pipe for the
combustion air intake (see Table 4), sized per Section
1.8. Route the intake to the heater as directly as
possible. Seal all joints with tape. Provide adequate
hangers. The unit must not support the weight of the
combustion air intake pipe. Maximum linear pipe
length allowed is 50 feet (15.2m). Up to five elbows
can be used with the 50 feet of pipe. Subtract 10
allowable linear feet for every additional elbow used.
The connection for the intake air pipe is in the
back of the unit. Take the plate off the back to reveal
the collar on the filter box. Run a bead of silicone
around the collar and slide the pipe over the collar.
Secure with sheet metal screws.
Size Horizontal Combustion Horizontal Vent
Air Terminal Terminal
1200 20260701 D2004500
1600 20260703 D2004500
2000 20260703 D2004600
2400 20260703 D2006200
Table 3. Horizontal Vent and Air Terminals
for Indoor Installations.

Brute Magnum Page 9
Term Description
Pipe Single-wall galvanized steel pipe, 24 gauge
minimum (sized per section 1.9)
Joint Permanent duct tape or aluminum tape
Sealing
Insulation Not required, but recommended R5 insulation
for cold installations (consult American Society
of Heating, Refrigerating, and Air Conditioning
Engineers (ASHRAE) handbook
Table 4. Required Combustion Air Piping Material.
In addition to air needed for combustion, air
shall also be supplied for ventilation, including all air
required for comfort and proper working conditions
for personnel. The Brute Magnum loses less than 1
percent of its input rating to the room, but other heat
sources may be present.
2.2 Venting
The Brute Magnum is a Category IV appliance
and must be installed with a stainless steel venting
system that complies with the UL 1738 Standard
(see Table 5). It must be installed per this installation
manual and the venting system manufacturer’s
Installation Instructions. The unit’s vent can terminate
through the roof, or through an outside wall. It can be
installed through walls that are from 3" (7.6cm) to 12"
(30cm) in thickness.
See Table 2 to select the appropriate vent pipe
diameter. The vent pipe must be pitch upward, toward
the vent terminal, so that condensate will run back to
the Brute Magnum, to drain. Route the vent pipe to
the heater as directly as possible. Seal all joints and
provide adequate hangers as required in the venting
system manufacturer’s Installation Instructions.
Horizontal portions of the venting system must be
supported to prevent sagging and may not have any
low sections that could trap condensate. The unit must
not support the weight of the vent pipe. Horizontal
runs must slope upwards not less than ¼ inch per
foot (21mm/m) from the unit to the vent terminal. Up
to five elbows can be used with the 50 feet (15.2m)
of pipe. Subtract 10 allowable linear feet for every
additional elbow used.
IMPORTANT NOTE ABOUT COMMON VENTING:
A single vent that is shared by multiple Brute Magnum
units MUST be engineered by a competent venting
specialist, and involves the selection of draft inducing
equipment, hardware and controls to properly
balance flue gas pressures. Do not common vent
Brute Magnum units unless the vent system
meets this requirement. Brute Magnum units are
never permitted to share a vent with Category I
appliances.
A condensate drain is built into the Brute
Magnum. A pressure switch monitors the condensate
drain pan, and will trip if the condensate level gets too
high. This will prevent the Brute Magnum from firing
if there is a blockage or overflow.
Connect a clear plastic tube, minimum 3/8"
diameter, between the drain connection and a floor
drain (or condensate pump if a floor drain is not
accessible).
Caution
Condensate is mildly acidic, and may harm some
floor drains and/or pipes, particularly those that
are metal. Ensure that the drain, drainpipe,
and anything that will come in contact with the
condensate can withstand the acidity, or neutralize
the condensate before disposal. Damage caused
by failure to install a neutralizer kit or to
adequately treat condensate will not be the
manufacturer’s responsibility.
A neutralizer kit is available from Bradford
White. The kit includes a condensate pump.
The condensate tray must be primed before starting
the unit. Fill the tray with water through the exhaust
vent connection on the back of the unit. Continue
filling until water flows out of the condensate drain
port. This prevents the flue gases from escaping through
the condensate drain. The condensate drain must be
installed so as to prevent accumulation of condensate.
When a condensate pump is not used, the tubing must
continuously slope downward (except for the trap loop)
toward the drain with no spiraling.
Consult local codes for disposal method.
Term Description
Venting Sealed stainless steel
system certified to UL1738.
Insulation Not required, but recommended R5
insulation with protective cover for cold
installations (consult American Society of
Heating, Refrigerating, and Air Conditioning
Engineers (ASHRAE) handbook)
Table 5. Required Venting Material.
2.3 Locating Vent & Combustion Air
Terminals
2.3.1 Horizontal Vent Terminal
The appropriate side wall vent hood must be
used, and is listed in the installation and operation
manual. The terminal provides a means of installing
the vent piping through the building wall, and must
be located in accordance with ANSI Z223.1/NFPA 54
and applicable local codes. In Canada, the installation
must be in accordance with CSA B149.1 or .2 and
local applicable codes. Consider the following when
installing the terminal:

BRADFORD WHITE CORP.
Page 10
Figure 3. Combustion Air and Vent Through Side Wall.
*When vent terminal is less than 10 feet (3m) horizontally
from a forced air inlet, the terminal must be at least 3 feet
(0.9m) above the air inlet.
U.S. Installations (see note 1) Canadian Installations (see note 2)
A= Clearance above grade, veranda, porch, 12 inches (30 cm) 12 inches (30 cm)
deck, or balcony
B= Clearance to window or door that may be 4 feet (1.2 m) below or to side of opening; 36 inches (91 cm)
opened 1 foot (30 cm) above opening
C= Clearance to permanently closed window See note 4 See note 5
D= Vertical clearance to ventilated soffit located
above the terminal within a horizontal See note 4 See note 5
distance of 2 feet (61cm) from the center line
of the terminal
E= Clearance to unventilated soffit See note 4 See note 5
F= Clearance to outside corner See note 4 See note 5
G= Clearance to inside corner See note 4 See note 5
H= Clearance to each side of center line 3 feet (91 cm) within a height 15 feet above
extended above meter/regulator assembly See note 4 the meter/regulator assembly
I= Clearance to service regulator vent outlet See note 4 3 feet (91 cm)
J= Clearance to nonmechanical air supply inlet
to building or the combustion air inlet to 4 feet (1.2 m) below or to side of opening; 36 inches (91 cm)
any other appliance 1 foot (30 cm) above opening
K= Clearance to a mechanical air supply inlet 3 feet (91 cm) above if within 10 feet (3 m) 6 feet (1.83 m)
horizontally
Vent termination not allowed in this location
Vent termination not allowed in this location for category IV appliances. A vent shall not
L= Clearance above paved sidewalk or paved for category IV appliances. For Category III terminate directly above a sidewalk or paved
driveway located on public property appliances, vent must terminate at least 7 driveway that is located between two single
feet (2.13m) above the sidewalk or driveway. family dwellings and serves both dwellings.
For Category III appliances that do not violate
the previous condition, vent must terminate at
least 7 feet (2.13m) above the sidewalk or
driveway.
M= Clearance under veranda, porch, deck, See note 4 12 inches (30 cm) (see note 3)
or balcony
Notes:
1. In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code.
2. In accordance with the current CAN/CGA-B149 Installation Codes.
3. Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
4. For clearances not specified in ANSI Z223.1 / NFPA 54, clearance is in accordance with local installation codes and the requirements of the
gas supplier.
5. For clearances not specified in CAN/CGA-B149, clearance is in accordance with local installation codes and the requirements of the gas
supplier.

Brute Magnum Page 11
1. The figure in this addendum shows the
requirements for mechanical vent terminal
clearances for the U.S. and Canada.
2. Vent terminals for condensing appliances or
appliances with condensing vents are not
permitted to terminate above a public walkway,
or over an area where condensate or vapor could
create a nuisance or hazard.
3. Locate the vent terminal so that vent gases cannot
be drawn into air conditioning system inlets.
4. Locate the vent terminal so that vent gases cannot
enter the building through doors, windows,
gravity inlets or other openings. Whenever
possible, locations under windows or near doors
should be avoided.
5. Locate the vent terminal so that it cannot be
blocked by snow. The installer may determine
that a vent terminal must be higher than the
minimum shown in codes, depending upon local
conditions.
6. Locate the terminal so the vent exhaust does
not settle on building surfaces or other nearby
objects. Vent products may damage such
surfaces or objects.
7. If the boiler or water heater uses ducted
combustion air from an intake terminal located
on the same wall, locate the vent terminal at least
3 feet (0.9m) horizontally from the combustion
air terminal, and locate the vent terminal at least
1 foot (0.3m) above the combustion air terminal.
From Massachusetts Rules and Regulations
248 CMR 5.08:
(a) For all side wall horizontally vented gas
fueled equipment installed in every dwelling,
building or structure used in whole or in
part for residential purposes, including those
owned or operated by the Commonwealth and
where the side wall exhaust vent termination
is less than seven (7) feet above finished grade
in the area of the venting, including but not
limited to decks and porches, the following
requirements shall be satisfied:
1. INSTALLATION OF CARBON MONOXIDE
DETECTORS
At the time of installation of the side wall
horizontal vented gas fueled equipment, the
installing plumber or gasfitter shall observe that
a hard-wired carbon monoxide detector with
an alarm and battery back-up is installed on the
floor level where the gas equipment is to be
installed. In addition, the installing plumber or
gasfitter shall observe that a battery operated or
hard-wired carbon monoxide detector with an
alarm is installed on each additional level of the
dwelling, building or structure served by the side
wall horizontal vented gas fueled equipment. It
shall be the responsibility of the property owner
to secure the services of qualified licensed
professionals for the installation of hard-wired
carbon monoxide detectors.
a. In the event that the side wall horizontally
vented gas fueled equipment is installed in a
crawl space or an attic, the hard-wired carbon
monoxide detector with alarm and battery
back-up may be installed on the next adjacent
floor level.
b. In the event that the requirements of this
subdivision cannot be met at the time of
completion of installation, the owner shall
have a period of thirty (30) days to comply
with the above requirements; provided,
however, that during said thirty (30) day
period, a battery operated carbon monoxide
detector with an alarm shall be installed.
2. APPROVED CARBON MONOXIDE
DETECTORS
Each carbon monoxide detector as required
in accordance with the above provisions shall
comply with NFPA 720 and be ANSI/UL 2034
listed and IAS certified.
3. SIGNAGE
A metal or plastic identification plate shall be
permanently mounted to the exterior of the
building at a minimum height of eight (8) feet
above grade directly in line with the exhaust vent
terminal for the horizontally vented gas fueled
heating appliance or equipment. The sign shall
read, in print size no less than one-half (½) inch
in size, “GAS VENT DIRECTLY BELOW.
KEEP CLEAR OF ALL OBSTRUCTIONS."
4. INSPECTION.
The state or local gas inspector of the side
wall horizontally vented gas fueled equipment
shall not approve the installation unless, upon
inspection, the inspector observes carbon
monoxide detectors and signage installed in
accordance with the provisions of 248 CMR
5.08(2)(a) 1 through 4.
(b) EXEMPTIONS: The following equipment is
exempt from 248 CMR 5.08(2)(a) 1 through 4:
1. The equipment listed in Chapter 10 entitled
“Equipment Not Required To Be Vented” in the
most current edition of NFPA 54 as adopted by
the Board; and
2. Product Approved side wall horizontal vented gas
fueled equipment installed in a room or structure
separate from the dwelling, building or structure
used in whole or in part for residential purposes.

BRADFORD WHITE CORP.
Page 12
(c) MANUFACTURER REQUIREMENTS –
GAS EQUIPMENT VENTING SYSTEM
PROVIDED. When the manufacturer of
Product Approved side wall horizontally
vented gas equipment provides a venting
system design or venting system components
with the equipment, the instructions provided
by the manufacturer for installation of the
equipment and the venting system shall
include:
1. Detailed instructions for the installation of the
venting system design or the venting system
components; and
2. A complete parts list for the venting system
design or venting system.
(d) MANUFACTURER REQUIREMENTS –
GAS EQUIPMENT VENTING SYSTEM
NOT PROVIDED. When the manufacturer
of a Product Approved side wall horizontally
vented gas fueled equipment does not
provide the parts for venting the fuel gases,
but identifies “special venting systems”, the
following requirements shall be satisfied by
the manufacturer:
1. The identification of each “special venting
system” shall include either the listing of the
website, phone number or manufacturer’s address
where the venting system installation instructions
can be obtained; and
2. The “special venting systems” shall be Product
Approved by the Board, and the instructions
provided with that system shall include a parts
list and detailed installation instructions.
(e) A copy of all installation instructions for the
Product Approved side wall horizontally
vented gas fueled equipment, and all the
venting instructions, parts lists, and/or design
instructions for the venting system shall
remain with the appliance or equipment at the
completion of the installation.
Contact factory with questions about venting
system installation.
2.3.2 Side Wall Combustion Air Terminal
The side wall combustion air terminal (see Table
4) must be used when the heater takes air from a
side wall. Consider the following when installing the
terminal:
1. Do not locate the air inlet terminal near a source
of corrosive chemical fumes (e.g., cleaning fluid,
chlorine compounds, etc.)
2. Locate the terminal so that it will not be subject
to damage by accident or vandalism. It must be at
least 7 feet (2.1m) above a public walkway.
3. Locate the combustion air terminal so that it
cannot be blocked by snow. The National Fuel
Gas Code requires that it be at least 12 inches
(30cm) above grade, but the installer may
determine it should be higher, depending upon
local conditions.
4. If the Brute Magnum is side-wall vented to the
same wall, locate the vent terminal at least 3
feet (0.9m) horizontally from the combustion air
terminal, and locate the vent terminal at least 1
foot (0.3m) above the combustion air terminal
(see Figure 3).
2.3.3 Vertical Vent Terminal
When the unit is vented through the roof, the
vent must extend at least 3 feet (0.9m) above the point
at which it penetrates the roof. It must extend at least
2 feet (0.6m) higher than any portion of a building
within a horizontal distance of 10 feet (3.0m), and high
enough above the roof line to prevent blockage from
snow. When the combustion air is taken from the roof,
the combustion air must terminate at least 12" (30cm)
below the vent terminal (see Figure 2).
2.3.4 Vertical Combustion Air Terminal
When combustion air is taken from the roof, a
field-supplied rain cap or an elbow arrangement must
be used to prevent entry of rain water (see Figure 2).
The opening on the end of the terminal must be at least
12" (30cm) above the point at which it penetrates the
roof, and high enough above the roof line to prevent
blockage from snow. When the vent terminates on the
roof, the combustion air must terminate at least 12"
(30cm) below the vent terminal.
2.4 Common Vent Test — Boilers
NOTE: This section does not describe a method for
common venting Brute Magnum units. It describes
what must be done when a unit is removed from a
common vent system. Brute Magnum units require
special vent systems and fan for common vent.
Contact the factory if you have questions about
common venting Brute Magnum units.
When an existing boiler is removed from a
common venting system, the common venting system
is likely to be too large for proper venting of the
appliances remaining connected to it.

Brute Magnum Page 13
At the time of removal of an existing boiler, the
following steps shall be followed with each appliance
remaining connected to the common venting system
placed in operation, while the other appliances
remaining connected to the common venting system are
not in operation.
1. Seal any unused openings in the common venting
system.
2. Visually inspect the venting system for proper
size and horizontal pitch and determine there is
no blockage or restriction, leakage, corrosion and
other deficiencies which could cause an unsafe
condition.
3. Insofar as it is practical, close all building doors
and windows and all doors between the space in
which the appliances remaining connected to the
common venting system are located and other
spaces of the building. Turn on clothes dryers
and any appliance not connected to the common
venting system. Turn on any exhaust fans, such
as range hoods and bathroom exhausts, so they
will operate at maximum speed. Do not operate a
summer exhaust fan. Close fireplace dampers.
4. Place in operation the appliance being inspected.
Follow the lighting instructions. Adjust thermostat
so appliance will operate continuously.
5. Test for spillage at the draft hood relief opening
after 5 minutes of main burner operation. Use
the flame of a match or candle, or smoke from a
cigarette, cigar or pipe.
6. After it has been determined that each appliance
remaining connected to the common venting
system properly vents when tested as outlined
above, return doors, windows, exhaust fans,
fireplace dampers and any other gas burning
appliance to their previous conditions of use.
7. Any improper operation of the common venting
system should be corrected so that the installation
conforms to the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 and/or CSA B149.1, Installation
Codes. When resizing any portion of the common
venting system, the common venting system
should be resized to approach the minimum size
as determined using the appropriate tables
and guidelines in the National Fuel Gas Code,
ANSI Z223.1 NFPA 54 and/or CSA B149.1,
Installation Codes.
Section 3
GAS SUPPLY AND PIPING
3.1 Gas Supply and Piping
Gas piping should be supported by suitable
hangers or floor stands, not the appliance.
Review the following instructions before
proceeding with the installation.
1. Verify that the appliance is fitted for the
proper type of gas by checking the rating plate.
Appliances are normally equipped to operate at
elevations up to 2000 feet (610m). However,
the appliance will function properly without the
use of high altitude modification at elevations
up to 10,000 feet (3050 m).
2. The maximum inlet gas pressure must not
exceed 13" W.C. (3.2kPa). The minimum
inlet natural gas pressure is 4" W.C. (1.0kPa)
and minimum inlet propane gas pressure is 6"
(1.5kPa).
3. Refer to Table 6, size supply.
4. Run gas supply line in accordance with all
applicable codes.
Note: If you have a boiler/water heater with
a normally open vent valve, install a vent line
from the vent valve to an outside location
as required by your installation code or IRI
requirement. Do not remove 3/4 inch pipe
plug from the vent valve if venting from the
normally open vent valve is not required by
your installation code.
5. Locate and install manual shutoff valves in
accordance with state and local requirements.
6. A sediment trap must be provided upstream of
the gas controls.
Size and Distance from Gas Meter or Last Stage Regulator
Gas Type 0-50 feet 0-15m 50-100 feet 15-31m 100-200 feet 31-61m 200-300 feet 61-91m
1200 natural 2" 5.1cm 2-1/2" 6.4cm 2-1/2" 6.4cm 3" 7.6cm
1200 propane 1-1/2" 3.8cm 2" 5.1cm 2" 5.1cm 2-1/2" 6.4cm
1600 natural 2-1/2" 6.4cm 2-1/2" 6.4cm 3" 7.6cm 3" 7.6cm
1600 propane 2" 5.1cm 2" 5.1cm 2-1/2" 6.4cm 2-1/2" 6.4cm
2000 natural 3" 7.6cm 3" 7.6cm 3" 7.6cm 3-1/2" 8.9cm
2000 propane 2-1/2" 6.4cm 2-1/2" 6.4cm 2-1/2" 6.4cm 3" 7.6cm
2400 natural 2-1/2" 6.4cm 3" 7.6cm 3" 7.6cm 3-1/2" 8.9cm
2400 propane 2" 5.1cm 2-1/2" 6.4cm 2-1/2" 6.4cm 3" 7.6cm
Notes: 1. These figures are based on 1/2" 0.12kPa water column pressure drop.
2. Check supply pressure and local code requirements before proceeding with work.
3. Pipe fittings must be considered when determining gas pipe sizing.
Table 6. Gas Piping Sizes.

BRADFORD WHITE CORP.
Page 14
7. All threaded joints should be coated with
piping compound resistant to action of liquefied
petroleum gas.
8. The appliance and its individual shutoff valve
must be disconnected from the gas supply piping
during any pressure testing of that system at test
pressures in excess of 1/2 PSIG (3.45kpa).
9. The unit must be isolated from the gas supply
system by closing its individual manual shutoff
valve during any pressure testing of the gas
supply piping system at test pressures equal to or
less than 1/2 PSIG (3.45kpa).
10. The appliance and its gas connection must be
leak tested before placing it in operation.
11. Purge all air from gas lines.
WARNING
Open flame can cause gas to ignite and result in
property damage, severe injury, or loss of life.
NOTE: The Brute Magnum appliance and all other
gas appliances sharing the gas supply line must be
firing at maximum capacity to properly measure the
inlet supply pressure. The pressure can be measured
at the supply pressure port on the gas valve. Low
gas pressure could be an indication of an undersized
gas meter, undersized gas supply lines and/or an
obstructed gas supply line. A bleed line from the
diaphragm-type automatic valve shall be vented per
local code requirements. Brute Magnum units are
equipped with low and high gas pressure switches that
are integrally vent limited. These types of devices do
not require venting to atmosphere.
Section 4A
WATER CONNECTIONS —
BRUTE MAGNUM BOILER
4A.1 Heating System Piping:
Hot Supply Connections — Boiler
NOTE: This appliance must be installed in a closed
pressure system with a minimum of 12 psi (82.7kPa)
static pressure at the boiler.
Hot water piping should be supported by suitable
hangers or floor stands. Do not support piping with
this appliance. Due to expansion and contraction of
copper pipe, consideration should be given to the type
of hangers used. Rigid hangers may transmit noise
through the system resulting from the piping sliding in
the hangers. It is recommended that padding be used
when rigid hangers are installed. Maintain 1" (2.5cm)
clearance to combustibles for hot water pipes.
Pipe the discharge of the relief valve (full size)
to a drain or in a manner to prevent injury in the event
of pressure relief. Install an air purger, an air vent,
a diaphragm-type expansion tank, and a hydronic
flow check in the system supply loop. Minimum fill
pressure must be 12psig (82.7kPa). Install shutoff
valves where required by code.
Suggested piping diagrams are shown in Figures
4, 5, and 6. These diagrams are meant only as a guide.
Components required by local codes must be properly
installed. The Brute Magnum boiler’s efficiency
is higher with lower return water temperatures.
Therefore, to get the most of low return temperature
with multiple boilers, pipe as shown in Figure 4.
The Brute Magnum boiler has an internal mixing
system that ensures that the condensation does not
occur on the finned copper heat exchanger, with
boiler return temperature down to 50°F (10°C). This
system, that consists of automatically actuated
and linked valves, is set up at the factory, and is
non-adjustable. The return water goes through the
stainless steel heat exchanger, then to the mixing
system (see Figure 7).
If the water at the inlet of the copper heat
exchanger is less than 140°F (60°C), water from the
outlet of the copper heat exchanger will be directed
back to the inlet of the copper heat exchanger, and will
mix to bring the inlet water up to 140°F (60°C). Once
through the copper heat exchanger, the water picks up
another 20-25°F (11-14°C) (when at high fire), and
it leaves the boiler at 160-165°F (71-74°C). This hot
water is then sent to the system.
If the water at the inlet of the copper heat exchanger
is 140°F (60°C), or higher, the water will be allowed to
flow through the copper heat exchanger and directly to the
outlet of the Brute Magnum, and there will be a 20-25°F
(11-14°C) temperature rise between the inlet and outlet of
the unit, when the unit is at high fire.
The pump in the boiler is sized for the boiler’s
heat exchangers, the internal mixing system, and 30
feet of full-sized piping, with a normal number of
fittings taken into consideration. The piping must be
primary/secondary, ensuring that the boiler’s pump is
only used for the boiler, and that the system pump(s)
do not interfere with the Brute Magnum pump or
mixing system.
The minimum inlet water temperature for the
Brute Magnum is 50°F (10°C) to avoid condensing
on the copper coils.
4A.2 Cold Water Make-Up — Boiler
1. Connect the cold water supply to the inlet
connection of an automatic fill valve.
2. Install a suitable back flow preventer between the
automatic fill valve and the cold water supply.
3. Install shut off valves where required.
NOTE: The boiler, when used in connection with a
refrigeration system, must be installed so the chilled

Brute Magnum Page 15
medium is piped in parallel with the boiler with
appropriate valves to prevent the chilled medium from
entering the boiler.
The boiler piping system of a hot water heating
boiler connected to heating coils located in air
handling appliances where they may be exposed to
refrigerated air circulation must be equipped with flow
control valves or other automatic means to prevent
gravity circulation of the boiler water during the
cooling cycle.
A boiler installed above radiation level, or as
required by the authority having jurisdiction, must be
provided with a low water cutoff device either as a part
of the boiler or at the time of boiler installation.
4A.3 Freeze Protection – Boiler
Brute Magnum units are not designed to be
placed outdoors, due to the potential for condensate to
freeze in the unit.
Proper precautions for freeze protection are
recommended for boiler installations in areas where
the danger of freezing exists.
Power outage, interruption of gas supply, failure
of system components, activation of safety devices,
etc., may prevent a boiler from firing. Any time a
boiler is subjected to freezing conditions, and the
boiler is not able to fire, and/or the water is not able
to circulate, there is a risk of freezing in the boiler
or in the pipes in the system. When water freezes,
it expands. This can result in bursting of pipes in the
system, or damage to the boiler, which could result in
leaking or flooding conditions.
Do not use automotive anti-freeze. Maintaining
a mixture of minimum 50% water and maximum
50% properly inhibited HVAC glycol, which contains
an antifoamant, is the preferred method of freeze
protection for Brute Magnum boilers. The percentage
of glycol used in the Brute Magnum boiler must
not exceed 50%. Typically, this mixture will
serve as burst protection for temperatures down to
approximately –35°F (-30°C).
IMPORTANT NOTES: Different glycol products
may provide varying degrees of protection. Glycol
products must be maintained properly in a heating
system, or they may become ineffective. Consult
the glycol specifications, or the glycol manufacturer,
for information about specific products, maintenance
of solutions, and set up according to your particular
conditions.
For installations where temperatures are
expected to fall below 15°F inside the boiler cabinet,
the actuating gas valve must be equipped with a gas
valve heater, part number R2010100. Note that some
gas trains such as the IRI option may have double
actuators, and may require 2 gas valve heaters.
Section 4B
WATER CONNECTIONS —
BRUTE MAGNUM WATER HEATER
4B.1 Water System Piping —
Water Heater
Hot water piping should be supported by
suitable hangers or floor stands. Do not support piping
with this appliance. Due to expansion and contraction
of copper pipe, consideration should be given to the
type of hangers used. Rigid hangers may transmit
noise through the system resulting from the piping
sliding in the hangers. It is recommended that padding
be used when rigid hangers are installed.
The Brute Magnum can be used with several
different types of readily available storage tanks. A
pump draws water from the storage tank and pumps
the water through the heater and back into the tank.
Pump-mounted units have a circulating pump built
into the water heater.
Pipe the outlet from the heater’s relief valve
such that any discharge from the relief valve will be
conducted to a suitable place for disposal when relief
occurs. Do not reduce line size or install any valves in
this line. The line must be installed to allow complete
drainage of both the valve and the line.
Suggested piping diagrams are shown in Figures
8, 9, 10, and 11. These diagrams are meant only as a
guide. Components required by local codes must be
properly installed.
The minimum inlet water temperature for the
Brute Magnum is 50°F (10°C) to avoid condensing
on the copper coils.
4B.2 Hot Water Supply Piping —
Water Heater
Follow the tank manufacturer’s guidelines for
completion of the hot water system connections.
NOTE: A listed temperature and pressure relief
valve listed as complying with the Standard for
Relief Valves and Automatic Gas Shutoff Devices
for Hot Water Supply Systems, 1). ANSI Z21.22
latest edition, or 2). CSA 4.4, of suitable discharge
capacity must be installed in the separate storage
tank system.
If the Brute Magnum water heater is installed in
a closed water supply system, such as one having a
backflow preventer in the cold water supply line, the
relief valve may discharge periodically, due to thermal
expansion. Means (such as a properly-sized expansion
tank) shall be provided to control thermal expansion.
Contact the water supplier or local plumbing inspector
on how to control this situation.

BRADFORD WHITE CORP.
Page 16
4B.3 Water Flow Requirements —
Water Heater
In a water heating application (an open system),
new water is constantly being introduced. With the
new water comes a fresh supply of minerals that can
be deposited on the unit’s heat exchanger. This is
commonly known as scaling. The amount of minerals
will depend upon the hardness of the water. Water can
also be aggressive, and can erode metals, including
copper, if the water is moved too quickly. Pump sizing
for the Brute Magnum water heater is based upon the
hardness of the water. The water flow is kept high
enough to prevent scaling, but low enough to prevent
tube erosion. For extremely soft or hard water, cupro-
nickel tubes are available. Contact a Bradford White
Representative if you have questions or concerns about
water quality.
The Brute Magnum water heater has an internal
mixing system that ensures that the condensation does
not occur on the finned copper heat exchanger, with
heater return temperature down to 50°F (10°C). This
system, that consists of automatically actuated
and linked valves, is set up at the factory, and is
non-adjustable. The return water goes through the
stainless steel heat exchanger, then to the mixing
system. (see Figure 7).
Figure 4. Hydronic Piping - Multiple Boilers.

Brute Magnum Page 17
If the water at the inlet of the copper heat
exchanger is less than 140°F (60°C), water from the
outlet of the copper heat exchanger will be directed
back to the inlet of the copper heat exchanger, and will
mix to bring the inlet water up to 140°F (60°C). Once
through the copper heat exchanger, the water picks up
another 20-25°F (11-14°C) (when at high fire), and
it leaves the boiler at 160-165°F (71-74°C). This hot
water is then sent to the system.
If the water at the inlet of the copper heat
exchanger is 140°F (60°C), or higher, the water will be
allowed to flow through the copper heat exchanger and
directly to the outlet of the Brute Magnum, and there
will be a 20-25°F (11-14°C) temperature rise between
the inlet and outlet of the unit, when the unit is at high
fire.
The pump in the heater is sized for the heater’s
heat exchangers, the internal mixing system, and 30
feet of full-sized piping, with a normal number of
fittings taken into consideration.
The minimum inlet water temperature for the
Brute Magnum is 50°F (10°C) to avoid condensing
on the copper coils.
Figure 5. Hydronic Piping — Multiple Boilers (Alternate).

BRADFORD WHITE CORP.
Page 18
4B.4 Combined Water (potable) Heating
and Space Heating
NOTE: These systems are not allowed in the
Commonwealth of Massachusetts.
Piping and components connected to this water
heater for the space heating application shall be
suitable for use with potable water.
Toxic chemicals, such as used for boiler
treatment, shall not be introduced into the potable
Figure 6. Hydronic Piping — One Boiler, Multi-Temperature System.
water used for space heating.
This water heater when used to supply potable
water shall not be connected to any heating system
or component(s) previously used with a non-potable
water heating appliance.
When the system requires water for heating at
temperatures higher than required for other uses,
an anti-scald mixing or tempering valve shall be
installed to temper the water for those uses in order
to reduce scald hazard potential.

Brute Magnum Page 19
Figure 7. Internal Piping Schematic.
4B.5 Freeze Protection – Water Heater
Brute Magnum heaters are not designed to be
placed outdoors, due to the potential for condensate to
freeze in the unit.
Power outage, interruption of gas supply, failure
of system components, activation of safety devices,
etc., may prevent a heater from firing. Any time a
heater is subjected to freezing conditions, and the
heater is not able to fire, and/or the water is not
able to circulate, there is a risk of freezing in the
heater or in the pipes in the system. When water
freezes, it expands. This can result in bursting of pipes
in the system, or damage to the heater, which could
result in leaking or flooding conditions.
For installations where temperatures are
expected to fall below 15°F inside the boiler cabinet,
the actuating gas valve must be equipped with a gas
valve heater, part number R2010100. Note that some
gas trains such as the IRI option may have double
actuators, and may require two gas valve heaters.

BRADFORD WHITE CORP.
Page 20
Figure 8. Water Heater Piping — One Heater, One Tank.