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Another hot water
®
solution from John Wood .
John Wood® water heaters by Noritz are brought to
the Canadian market through the exclusive partnership
between GSW and Noritz. They complement GSW's portfolio
of high performance residential and commercial gas water
heating solutions. John Wood® also offers a full-range of
accessories that makes installation quick and easy. The
unique snap-together design of our N-Vent system saves
time and money. N-Vent telescopic elements completely
eliminate the need to cut vent pipe.
As a green building product it's
environmentally friendly too!
John Wood® water heaters are extremely energy
efficient, maximizing output while maintaining
low emissions.
Features
• Abundant hot water
• Energy efficient
• Space savings
• Safe & reliable
• Easy to install
N-Vent – the most
advanced venting
system on the market.
Installation made simple
and efficient.
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Table of Contents
GSW Water Heating
RESIDENTIAL PRODUCTS
GSW Safety Systems
Residential Gas
1
3
4
Residential Propane
John Wood® Power Vent
John Wood® Power Direct Vent
John Wood® Direct Vent
Residential Electric
SpaceSaver®
6
8
12
14
16
18
20
22
24
26
28
30
32
34
36
Residential Oil
Oil Fired Burners
Polaris®
Storage Booster Tanks
FlowTHRU®
Indirect Water Heaters
Diaphragm Pump Tanks
Thermal Expansion Tanks
Range Boiler
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Table of Contents
COMMERCIAL PRODUCTS
Signature Series
37
38
40
42
43
44
46
48
50
52
54
Signature Series Gas
Signature Series Propane
Conversion and De-rate Kits
Power Vent Kits
Signature Series Electric
Commercial Oil
Signature Series Storage Tanks
Light Duty Commercial Gas
Light Duty Commercial Electric
Polaris®
TANKLESS PRODUCTS
John Wood® by Noritz
57
APPENDICES
Cross-Over Matrix
61
63
65
66
72
Sizing Guide
Ohm's Law
Reference Guide for Water Heating
Innovative Designs and Service and Support
GSW does not represent and/or warrant in any manner the information and
suggestions contained in this brochure. GSW maintains a policy of ongoing
product improvement. This may result in modification of features and/or
specifications without notice.
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GSW Water Heating
A leader in residential and commercial water heaters, GSW has evolved
from a wood-burning stove company to a world-class designer and
manufacturer of electric, natural gas, propane and oil fired water
heaters. Backed by the company’s manufacturing history of more than
150 years, GSW is recognized for design innovation and exceptional
reliability.
Professionals recognize GSW brand names, such as John Wood®, for
their unrivaled quality, efficiency and reliability. In fact, contractors have
been trusting John Wood® for more than 50 years.
The new John Wood® Signature Series has been specifically designed
for the needs of the professional installer. Our new gas models now
deliver lower profiles for easy installation and maintenance, as well as
smaller vent diameters and ultra-accurate dual electric thermostats
for precision and control. What’s more, our Signature Series electric
models are custom built-to-order to ensure your exact specifications
are met. All our heaters offer advanced features such as TankSaver®
stainless steel inserts and glass-lined tanks for longer life.
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GSW Water Heating
GSW is one of the largest North American water heater manufacturers
and a major supplier of residential and commercial water heaters
worldwide. We have built an organization that strives for excellence at
every stage. Our Research and Development Team constantly develops
prototypes for continuous improvement, while our CSA-certified lab
tests efficiency, performance and safety. Our inspectors maintain our
stringent quality control standards, and our Technical Service
department provides customers with product information and technical
support. Moreover, GSW offers customized solutions for order
management and logistics needs. From design to manufacturing, from
service to support, GSW is committed to delivering products renowned
for their technological innovation and unparalleled quality.
2
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Residential
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GSW Safety Systems
Flammable Vapour Ignition Resistant
(FVIR) technology you can trust.
GSW Water Heating has developed three unique Flammable Vapour
Ignition Resistant (FVIR) Safety Systems that reduce the risk of
accidental fires caused by the ignition of flammable vapours from
products such as gasoline, paint thinner and solvents: the Flame
Guard® and Flame SafeTM Safety Systems and the Superflue®
Safety System.
Flame Guard® Safety System
The Flame Guard® Safety System is a recognized and proven
technology, exclusive to GSW and John Wood residential gas
water heaters. The award-winning Flame Guard® Safety
System protects the consumer by trapping burning vapours within the
water heater combustion chamber through the patented “Flame-Trap.”
As long as the vapours are present and within the flammability range,
they will continue to burn safely until they “burn themselves out.”
Flame SafeTM Safety System Used
on John Wood® DV Water Heaters
Flame SafeTM technology - designed to protect the consumer
against the ignition of flammable vapours.
Superflue® Safety System Used
on John Wood® PV Water Heaters
The Flammable Vapour Ignition Resistant (FVIR) Superflue® Safety
System is a cutting-edge design unique to GSW power vented
residential gas water heaters. The Superflue® Safety System features a
flammable vapour sensor that protects the consumer by detecting the
presence of flammable vapours in the atmosphere around the water
heater and disabling the unit to minimize the risk of ignition. It also
features a robust air intake snorkel that inhibits flammable vapours
from entering the combustion chamber and igniting.
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Residential Gas
Proven Technology. Exceptional Reliability.
Peace-of-mind.
• Glass-lined inner flue prevents scaling.
• Robust 1/4" pilot tubing for durability.
• Exceeds new NRCan energy
requirements.
• Large viewport for easy access
to pilot.
• CFC-free foam insulation.
D
A
B
C
4
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Residential Gas
Proven Technology. Exceptional Reliability.
Peace-of-mind.
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Residential Propane
Proven Technology. Exceptional Reliability.
Peace-of-mind.
• Glass-lined inner flue prevents scaling.
• Robust 1/4" pilot tubing for durability.
• Exceeds new NRCan energy
requirements.
• Large viewport for easy access to
pilot.
• CFC-free foam insulation.
D
A
B
C
6
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Residential Propane
Proven Technology. Exceptional Reliability.
Peace-of-mind.
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®
John Wood Power Vent
An advanced line of power vented
water heaters for the professional.
• Flammable vapour sensor detects
the presence of flammable vapours
and automatically disables the unit
preventing their ignition.
• Robust air intake snorkel inhibits
flammable vapours from entering
the sealed combustion chamber.
• State-of-the-art modular gas control
features advanced self-diagnostic
capability that makes troubleshooting
quick and easy.
• All units can be vented horizontally
through the wall or vertically through
the roof with plastic venting pipe
certified for gas fired appliances.
• Quietest power vent water heater
on the market.
8
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®
John Wood Power Vent
An advanced line of power vented
water heaters for the professional.
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®
John Wood Power Vent
Large capacity power vent water heaters.
•
•
•
•
•
Flexible vent connector coupling
reduces vibration noise.
Electronic gas control with
self-diagnostics.
Wide burner door for easy
accessibility.
Convenient 3/4" side toppings for
combo applications on 75 USG models.
CFC-free foam insulation.
10
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®
John Wood Power Vent
Large capacity power vent water heaters.
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®
John Wood Power Direct Vent
An advanced line of high efficiency power
direct vented water heaters.
• Sealed combustion chamber design
enhances air quality as no indoor air
is required for combustion.
• Industry leading, ultra quiet blower
continues the GSW tradition of quiet
power vent water heaters.
• Convenient 3/4" side taps for
combination applications.
• Energy savings - exceeds energy
efficiency standards.
• Vented with 3" plastic pipe certified
for gas fired appliances, up to 60
equivalent feet, horizontally through
the wall or vertically through the roof.
C
A
D
B
12
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®
John Wood Power Direct Vent
An advanced line of high efficiency power
direct vented water heaters.
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®
John Wood Direct Vent
A unique balanced flue design.
• No chimney needed.
• Easy to install flexible co-axial vent
supplied with the water heater.
• Meets latest NRCan energy efficiency
standards.
• No external power supply required.
• CFC-free foam insulation.
Y
A
SIDE TAPS
B
C
F
H
G
E
D
FRONT
RIGHT
25.16
TEMPERATURE
CONTROL KNOB
42°
47°
55°
69°
TOP
14
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®
John Wood Direct Ven
t
A unique balanced flue design.
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Residential Electric
The optimum in reliability, performance
and energy efficiency.
• Patented Styropour®
base for added
energy efficiency.
• Thermostatically
controlled long life
elements.
• Meets latest NRCan
energy efficiency
regulations.
• NEW Series PRO bottom
entry models.
• CFC-free foam
insulation.
16
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Residential Electric
The optimum in reliability, performance
and energy efficiency.
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®
SpaceSaver
Put hot water right where you need it!
• Designed for installation in cottages, offices, mobile homes and
other applications where space is limited.
• Meets latest energy efficiency standards.
• Galvanized bottom pan protects water heater.
• Personnel protector covers elements and controls
for added safety.
18
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®
SpaceSaver
Put hot water right where you need it!
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Residential Oil
Exclusive, patented innovation.
•
•
•
Immersion-type aquastat for precise
water temperature control.
Universal mounting design fits most
burners.
Ceramic fibre combustion chamber
maximizes heat retention.
•
•
Includes blocked flue safety switch.
Suitable for combination applications,
potable water and space heating.
20
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Residential Oil
Exclusive, patented innovation.
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Oil Fired Burners
GSW offers oil burners designed and
engineered by one of the industry’s
leading oil burner manufacturers.
Beckett
Beckett’s residential flame-retention model AFG burner is easy to
install and to service, engineered to provide years of reliable service,
and backed by solid technical support. The AFG burner comes with a
Beckett CleanCut Fuel Unit, Beckett R7184 Series 5 Primary Control,
self-centering Nozzle Line Electrode Assembly and one-piece Flame
Retention Head.
22
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Oil Fired Burners
Specifications
Beckett Oil Burners
SKU#
GPH Input
0.65
BTU Input
91,000
J3006
J5006
0.75
105,000
138,000
J7006
1.00
Burner for Direct Vent Model (JWF307V)
SKU#
GPH Input
BTU Input
J3007
0.65
91,000
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Polaris®
The quiet and efficient way to heat water.
•
•
•
High grade stainless steel tank with
brass connections for years of
dependable service – no anode
required.
Submerged combustion chamber
with spiral flue for 95-96% thermal
efficiency and ultra-low standby heat
loss.
Woven metal fibre burner made of
refractory steel resists corrosion,
produces low NOx emissions and is
resistant to thermal and mechanical
shocks.
•
•
Plug-and-play technology with no
special adjustments at initial startup
including no adjustments or de-rating
for high altitude installations.
Specifically designed for space
heating.
G
G
A
B
A
B
F
C
C
E
D
34-50 US GALLON
100 US GALLON
24
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Polaris®
The quiet and efficient way to heat water.
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Storage Booster Tanks
Exclusive, patented innovation.
• Equipped with an adjustable
thermostat, pre-wired and ready for
connection to a circulator pump for
accurate and automatic temperature
control.
• Factory-installed nipples for
easy installation.
• 2" of CFC-free foam insulation.
SUPPLY (TO BOILER
TANKLESS COIL)
HOT OUTLET
JUNCTION
BOX
ANODE
T&P VALVE
ACCESS
DOORS
THERMOSTAT
CONTROL
THERMOSTAT
RETAINER
COMBINATION
RETURN & DRAIN
VALVE
CHECK VALVE
EXPANSION TANK
(OPTIONAL)
CIRCULATOR
PUMP
PRESSURE
REGULATOR
(OPTIONAL)
HOT
COLD
T&P
VALVE
TANKLESS COIL BOILER
HOT
STORAGE
BOOSTER
TANK
COMBINATION
RETURN & DRAIN VALVE
26
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Storage Booster Tanks
Exclusive, patented innovation.
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®
FlowTHRU
Storage tanks specifically designed by GSW to
complement our tankless series of water heaters.
• Exclusive, patented TankSaver®
design works to prolong tank life.
• Factory installed dielectric nipples
for ease of installation.
• T&P valve conveniently located
on the side.
• Top access junction box for
convenient electrical hook-up.
• Equipped with an adjustable
thermostat, pre-wired and ready for
connection to a circulator pump.
28
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®
FlowTHRU
Storage tanks specifically designed by GSW to
complement our tankless series of water heaters.
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Indirect Water Heaters
Exclusive, patented innovation.
•
•
•
Accurate automatic surface
mount thermostat.
Glass-lined coil for efficient heat
transfer.
Clean-out port for lime removal on
75 gallon models.
•
•
3/4" NPT boiler connections.
2" of CFC-free foam insulation.
30
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Indirect Water Heaters
Exclusive, patented innovation.
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Diaphragm Pump Tanks
Capacities from 2 to 119 US Gallons.
• Positive lock retention system ensures controlled compression
in the diaphragm connection, eliminating the loss of air or water
from the tank.
• Interior epoxy coating permanently bonded
to the tank shell provides the ultimate
protection on the water side of the tank.
• Durable butyl diaphragm ensures long life.
• Undercoated with zinc phosphate for the
highest corrosion resistance.
• Welded steel base.
32
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Diaphragm Pump Tanks
Specifications
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Thermal Expansion Tanks
The perfect solution for
controlling thermal expansion.
• Available for hydronic or potable
water applications.
• Durable drawn steel construction
with 2-coat bonded polymer inner
lining.
• Heavy duty butyl diaphragm, for
permanent separation of air and
water.
• IAPMO approved.
• Suitable for residential and
commercial water heaters.
• In-line design, with 3/4" NPT
connection: installs in cold water line
of water heater.
• Field-adjustable 40 psi air charge
on potable models, 12 psi on
hydronic models.
• Maximum working pressure 150 psi on potable models, 100 psi
on hydronic models.
• Maximum temperature: 180°F on potable models, 240°F on
hydronic models.
• NSF 61 approved on potable water tanks.
34
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Thermal Expansion Tanks
Specifications
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Range Boiler
Glass-lined, painted tank.
JWT5140
• 40 US Gallon Capacity/151 L.
• 14" Diameter.
• 1" Pipe Connections.
• 150 PSI working pressure.
JWT5140
36
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Commercial
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Signature Series
A proud tradition of leadership.
The new John Wood® Signature Series has been specifically designed
for the needs of the professional installer. Our new gas models now
deliver lower profiles for easy installation and maintenance, as well as
smaller vent diameters and ultra-accurate dual electric thermostats for
precision and control. What’s more, our Signature Series electric
models are custom built-to-order to ensure your exact specifications
are met. All of our heaters offer advanced features such as TankSaver®
stainless steel inserts and glass-lined tanks for longer life.
Download from Www.Somanuals.com. All Manuals Search And Download.37
Signature Series Gas
A proud tradition of leadership.
•
Dependable three-leg design for
better leveling.
•
•
•
Galvanized steel bottom for long life.
CFC-free foam insulation.
Meets or exceeds ASHRAE 90.1
1999 energy efficiency standards.
•
•
Removable anodes protect the inner
glass-lined tank.
Robust 1/4" pilot tubing.
G
H
I
A
B
C
F
D
E
38
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Signature Series Gas
A proud tradition of leadership.
A S M E
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Signature Series Propane
A proud tradition of leadership.
•
Dependable three-leg design for
better leveling.
•
•
•
Galvanized steel bottom for long life.
CFC-free foam insulation.
Meets or exceeds ASHRAE 90.1
1999 energy efficiency standards.
•
•
Removable anodes protect the inner
glass-lined tank.
Robust 1/4" pilot tubing.
G
H
I
A
B
C
F
D
E
40
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Signature Series Propane
A proud tradition of leadership.
A S M E
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Conversion and De-rate Kits
New pre-certified kits for all Signature Series models.
42
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Power Vent Kits
Advanced technology with Tjernlund venting
products for all Signature Series models.
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Signature Series Electric
Custom built-to-order.
•
•
Meets or exceeds ASHRAE Efficiency
Standards.
Factory installed 1 1/2" dielectric
cold water inlet and hot water outlet
nipples for ease of installation.
•
•
2" CFC-free foam insulation.
Conveniently located handhole
cleanout.
•
Factory installed T&P and brass drain
valve.
44
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Signature Series Electric
Custom built-to-order.
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Commercial Oil
High output, high efficiency.
• Multi-flue design for fast recovery.
• Equipped with multiple anode rods
for long life.
• Factory installed T&P and drain valve.
• Universal mounting design suits most
burners.
• Includes blocked flue safety switch
in accordance with CSA B140.0-03.
• TankSaver® technology.
D
See pages 22 & 23
for Oil Fired Burners
A
B
C
46
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Commercial Oil
High output, high efficiency.
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Signature Series Storage Tanks
Available in 80 and 119 US Gallon models.
•
•
•
Equipped with multiple anode rods
for long life.
Conveniently located handhole
cleanout.
Factory installed 2" dielectric nipples
and brass drain valve on insulated
models.
•
•
2" CFC-free foam insulation on
CST-119 and CST-80.
Front inlet and outlet for recirculation.
H
A
B
G
C
D
E
F
48
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Signature Series Storage Tanks
Available in 80 and 119 US Gallon models.
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Light Duty Commercial Gas
The right fit for lower demand
commercial applications.
•
Dependable three-leg design for
better leveling.
•
•
•
Galvanized steel bottom for long life.
CFC-free foam insulation.
Meets new NRCan energy efficiency
standards.
•
180˚F thermostat to meet
commercial water requirements.
JW3-75-3NC Model
A
B
50
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Light Duty Commercial Gas
The right fit for lower demand
commercial applications.
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Light Duty Commercial Electric
The right fit for lower demand
commercial applications.
•
•
•
Automatic temperature control.
CFC-free foam insulation.
Heavy duty contactors designed
to handle all anticipated loads.
•
•
Over temperature protection.
Wide range of electrical knockouts.
14 1/2"
(370mm)
45°
TWO
COMBINED
1 1/2" & 2"
KNOCKOUTS
ON TOP OF
JUNCTION
BOX
90°
ALL WATER CONNECTIONS - 1" N.P.T.
6 1/2"
(165mm)
28 1/4" O.D. (715mm)
4"
(100mm)
24 1/4"
(615mm)
TWO
COMBINED
1 1/2" & 2"
KNOCKOUTS
ON OPPOSITE
SIDE OF
71 3/8"
(1813mm)
JUNCTION
BOX
OUTLET & DRAIN ARE
INTERCHANGEABLE
DRAIN
OUTLET
8 1/4"
(210mm)
52
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Light Duty Commercial Electric
The right fit for lower demand
commercial applications.
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®
Polaris
The quiet and efficient way to heat water.
•
•
•
High grade stainless steel tank with
brass connections for years of
dependable service – no anode
required.
Submerged combustion chamber
with spiral flue for 95-96% thermal
efficiency and ultra-low standby heat
loss.
Woven metal fibre burner of
refractory steel resists corrosion,
produces low NOx emissions and is
resistant to thermal and mechanical
shocks.
•
•
Uniform combustion provides
excellent heat transfer.
Plug-and-play technology with no
special adjustments at initial startup
including no adjustments or de-rating
for high altitude installations.
G
G
A
B
A
B
F
C
C
E
D
100 US GALLON
34-50 US GALLON
54
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®
Polaris
The quiet and efficient way to heat water.
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®
John Wood Signature Series Gas
Commercial Water Heaters
are
designed specifically for
professional installers.
Intelligent electronic
integrated control, featuring:
• Self diagnostic
• Displays error codes
• Ease of accurate
temperature settings
• Displays temperature
at each sensor
• Temperature can be
adjusted from 90˚F to
180˚F
• All connections inside the
integrated control are not
interchangeable
• Ease of serviceability
and installation
For more information see pages 37 to 49 in this book.
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Tankless
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®
John Wood by Noritz
Tankless for professionals.
Residential Models
John Wood® residential water heaters by Noritz are designed to provide
abundant hot water for the entire home. All residential tankless water
heaters are backed by a 10-year warranty.
Commercial Models
Commercial tankless water heaters use commercial grade materials,
such as a coated copper heat exchanger and 25% thicker piping than
the residential models, making John Wood® commercial water heaters
unique. Up to 24 can be linked with a system controller to provide
abundant hot water for heavy industrial applications.
Direct Vent, Sealed Combustion Models
John Wood® offers Direct Vent models for use in areas where
combustion air from indoors is not available, such as spas, hair
salons, or air tight spaces. John Wood® Direct Vent models take air
from outside for combustion. The John Wood® line includes the only
commercial Direct Vent unit on the market. This unit has a coated
copper heat exchanger and 25% thicker piping than residential
models to ensure years of service.
Quick-Connect
All John Wood® commercial, direct vent and most residential models
are Quick-Connect compatible, allowing two units to be installed in
series, doubling water capacity when needed.
Accessories
GSW offers a full line of accessories making installation quicker and
easier, not to mention cleaner and more aesthetically pleasing. GSW is
the “one-stop shop,” supplying everything from tankless water heaters
to valves to stainless steel venting.
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®
John Wood by Noritz
Tankless for professionals.
•
•
•
Product line includes the highest
input commercial tankless water
heater and the only direct vent
model on the market.
State-of-the-art gas combustion
technology maximizes output and
provides temperature stability,
while maintaining low emissions.
High-tech electronics provide
precise control and safety, while
minimizing temperature
fluctuations.
DIRECT VENT
OTHER MODELS
58
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®
John Wood by Noritz
Tankless for professionals.
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High Quality
Features:
• Sealed
Combustion
Chamber Design
• Industry Leading
Ultra Quiet Blower
• Exceed Energy
Efficiency
Standards
• Flexible Venting
Configurations
For more information about this product from John Wood®, flip
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Appendices
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Appendices
Cross-Over Matrix
M B T U
G a l . C a p .
M o d e l #
G i a n t
M T B U
G a l . C a p .
M o d e l #
B r a d f o r d W h i t e
M T B U
G a l . C a p .
M o d e l #
S t a t e
M T B U
G a l . C a p .
M o d e l #
O l d A O S m i t h
M T B U
G a l . C a p .
M o d e l #
N e w A O S m i t h
M T B U
G a l . C a p .
M o d e l #
R h e e m
M T B U
G a l . C a p .
M o d e l #
o o d
O l d J o h n W
M T B U
G a l . C a p .
M o d e l #
S i g n a t u r e
o o d J o h n W
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Appendices
Cross-Over Matrix
M B T U
G a l . C a p .
M o d e l #
G i a n t
M T B U
G a l . C a p .
M o d e l #
B r a d f o r d W h i t e
M T B U
G a l . C a p .
M o d e l #
S t a t e
M T B U
G a l . C a p .
M o d e l #
O l d A O S m i t h
M T B U
G a l . C a p .
M o d e l #
N e w A O S m i t h
M T B U
G a l . C a p .
M o d e l #
R h e e m
M T B U
G a l . C a p .
M o d e l #
S i g n a t u r e
o o d
O l d J o h n W
M T B U
G a l . C a p .
M o d e l #
S i g n a t u r e
o o d J o h n W
A S M E
62
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Appendices
Sizing Guide
Commercial Electric Water Heater Quick Sizing Guide
MOTELS AND HOTELS
COIN OPERATED LAUNDRIES
# of Units
1-3
KW
27
# of Units
1-3
KW
27
4-7
54
4-7
54
8-10
2-36
2-54
3-54
4-54
5-54
6-54
8-54
10-54
8-10
2-36
2-54
3-54
4-54
5-54
6-54
8-54
10-54
11-17
18-25
26-32
33-40
41-48
49-64
65-80
11-17
18-25
26-32
33-40
41-48
49-64
65-80
BEAUTY/BARBER SHOPS
APARTMENT BUILDINGS
# of Stations
1-3
KW
9
# of Units
1-7
KW
18
4-9
30
8-15
36
10-15
16-21
22-35
54
16-20
21-32
33-55
56-70
45
2-36
3-54
2-36
3-45
3-54
Sizing based on 2-3 US gallon/minute shower heads.
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Appendices
Sizing Guide
Commercial Gas Water Heater Quick Sizing Guide
MOTELS AND HOTELS*
COIN OPERATED LAUNDRIES
# of Units
1-3
Model
# of Units
1-4
Model
1-JW3-75-3
1-JWSC75-125
1-JWSC100-199
2-JWSC80-250
2-JWSC75-360
3-JWSC75-300
3-JWSC75-360
4-JWSC75-300
5-JWSC75-399
6-JWSC75-399
1-JWSC80-199
1-JWSC75-250
1-JWSC75-300
1-JWSC75-399
2-JWSC75-250
2-JWSC75-399
4-10
5-7
11-17
18-25
26-32
33-40
41-46
47-64
65-80
8-9
10-12
13-16
17-20
21-25
* Sizing based on 2-3 gallon/minute shower heads
and systems with circulation returns.
BEAUTY/BARBER SHOPS
APARTMENT BUILDINGS**
# of Stations
1-3
Model
# of Units
1-7
Model
1-JWSC75-125
1-JWSC100-199
1-JWSC75-360
1-JWSC75-399
2-JWSC75-360
2-JWSC75-399
1-JW6058
4-9
1-JWSC75-125
1-JWSC80-250
1-JWSC75-300
2-JWSC75-300
8-15
10-15
16-21
22-35
16-20
21-32
33-55
56-70
** For larger buildings consult the factory.
64
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Appendices
Reference Calculations and Conversions for Electricity
Ohm's Law
Ohm's Law defines the relationships between (P) power, (E) voltage, (I)
current, and (R) resistance. One ohm is the resistance value through which
one volt will maintain a current of one ampere.
(I) Current is what flows on a wire or conductor like water flowing down a
river. Current flows from points of high voltage to points of low voltage on
the surface of a conductor. Current is measured in (A) amperes or amps.
(E) Voltage is the difference in electrical potential between two points in a
circuit. It's the push or pressure behind current flow through a circuit, and
is measured in (V) volts.
(R) Resistance determines how much current will flow through a
component. Resistors are used to control voltage and current levels. A very
high resistance allows a small amount of current to flow. A very low
resistance allows a large amount of current to flow. Resistance is
measured in ohms.
(P) Power is the amount of current times the voltage level at a given point
measured in wattage or watts.
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Appendices
Reference Guide for Water Heating
One US gallon of fresh water weighs 8.333 lb.
Water expands 4.34% heated from 40o to 212o F.
1 BTU = Amount of heat required to raise the temperature of 1 lb. of
water 1o F.
Recovery GPH = KW x 3412
(Electric)
8.33 x ΔT
Recovery GPH = Input x Efficiency
(Gas)
8.33 x ΔT
Req. BTU Input = Water Heater Capacity x 8.33 x ΔT
% Efficiency
First Hour Draw (FHD)
FHD = (Storage x % Efficiency) + Recovery
% of hot and cold water needed to be mixed to obtain a desired
temperature
Hot water percentage = M-C
H-C
Cold water percentage = H-M
H-C
Water C = Cold Water Temperature
H = Hot Water Temperature
M = Mixed Water Temperature
% Efficiency = GPH x 8.33 x Temp. Rise
BTU/Hr. Input
66
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Appendices
Reference Guide for Water Heating
BTU/Output = GPH x 8.33 lbs./Gal. x Temp. Rise
BTU/Input = GPH x 8.33 x Temp. Rise
% Efficiency
KW = GPH x 8.33 x Temp. Rise
3413
Temperatures
To convert from degrees Centigrade (C) to degrees Fahrenheit (F)
multiply the number of degrees C by 9/5 (or 1.8) and add 32.
To convert from degrees Fahrenheit (F) to degrees Centigrade (C) first
subtract 32 from the number of degrees F then multiply the remainder
by 5/9 (or 0.556).
Gas/Oil
Gas
1 lb. of Butane
BTUs
21,300
102,600
3,260
530
=
=
=
=
=
=
=
=
=
1 Gal. of Butane
1 Cu. Ft. of Butane
1 Cu. Ft. of Manufactured
1 Cu. Ft. of Mixed
1 Cu. Ft. of Natural
1 lb. of Propane
1 Gal. of Propane
1 Cu. Ft. of Propane
850
1,075
21,600
91,700
2,570
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Appendices
Reference Guide for Water Heating
Oil vs. Electric vs. Propane vs. Natural Gas
Oil
1 litre = 36,515 BTUs*
Example Price = 60.0¢/litre
Electric
Propane
1 Kilowatt Hour = 3,413 BTUs*
Example Price = 10.1¢/KW (kilowatt)
1 litre = 24,197 BTUs*
Example Price = 63.0¢/litre
Natural Gas 1 M3 35,310 BTUs*
Example Price = 44.0¢/M3 (cubic metre)**
Formula
BTUs per Unit x Efficiency
Cost per Unit
Example:
Propane = 24,197 x 92% = 35335 BTUs per $1.00
0.63
GST is extra on all prices.
* Information supplied by The Ontario Ministry of Energy.
** This price reflects delivery charge and monthly administration
charge to service your account.
Formulas and Facts
• 1 gallon of water weighs 8.33 lbs.
• 1 gallon of water has a volume of 231 cubic inches
• 1 cubic foot of water weighs 62.38 lbs. and contains 7.48 gallons
of water
• 100 feet of 3/4" copper pipe contains 2.5 gallons of water; 1" pipe
contains 4.3 gallons
• 8.33 BTU will raise 1 gallon of water 1o F at 100% efficiency
(electricity)
68
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Appendices
Reference Guide for Water Heating
• 11 BTUs are required to raise 1 gallon of water 1o F at 70% efficiency
(gas)
• 3,412 BTUs equal 1 kilowatt hour (KW)
• 1 KW will raise 410 gallons of water 1o F at 100% efficiency
• 1 BTU x 0.293 = watts
• 1 KW = 1000 watts
• 2.42 watts are required to raise 1 gallon of water 1o F
1 KW will raise 10.25 gallons of water 40o F at 100% efficiency
1 KW will raise 6.8 gallons of water 60o F at 100% efficiency
1 KW will raise 5.1 gallons of water 80o F at 100% efficiency
1 KW will raise 4.1 gallons of water 100o F at 100% efficiency
Formula for mixing hot water
M-C
H-C
= Percent of hot water required to produce desired mixed
temperature
Where M = mixed water temperature; C = cold water temperature;
H = hot water temperature
For example: How much of a shower is hot water and how
much is cold water?
My shower temperature is 105o F, my water heater thermostat is
set on 120o F and the cold water inlet temperature is 50o F.
105 – 50 = 55
120 – 50 = 70
= 79% of the shower is 120o hot water
This formula for mixing hot water is important when explaining a NOT
ENOUGH HOT WATER trouble call and the water heater is functioning
properly.
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Appendices
Reference Guide for Water Heating
ELECTRIC
GAS
Energy Costs:
Energy Costs:
KW x fuel costs = energy costs
Cubic feet x fuel costs = energy costs
100 x 0.75 = $7.50
100 x 0.05 = $5.00
To obtain gallons per hour
(GPH) recovery
To obtain gallons per hour
(GPH) recovery
WATTS
2.42 x (temp rise o F)
HOURLY INPUT (BTUs)
11.0 x (temp rise o F)
I have a 30-gallon electric
heater, non-simultaneous
I have a 30-gallon gas heater,
rated at 40,000 BTUs. What is the
recovery GPH if my cold water is
40o F and my thermostat is set to
120o F?
operation, 4,500 watt elements.
What is the recovery GPH if my
cold water is 40o F and my
thermostat is set to 120o F?
40,000
= 45 gallons per hour
11.0 x 80
4,500
= 23 gallons per hour
2.42 x 80
Temperature Rise (o F)
WATTS
Temperature Rise (o F)
HOURLY INPUT (BTUs)
11.0 x GPH
2.42 x GPH
I have a 30-gallon electric
heater, non-simultaneous
I have a 30-gallon gas heater,
rated at 40,000 BTUs. What is the
maximum temperature rise if the
heater can recover 45 gallons per
hour?
operation, 4,500 watt elements.
What is the maximum
temperature rise if the heater
can recover 23 gallons per hour?
40,000
= 80o temp
4,500
11.0 x 45 rise
= 80o temp
2.42 x 23 rise
70
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Appendices
Reference Guide for Water Heating
Oil
BTUs
1 Gal. #1 Fuel
1 Gal. #2 Fuel
1 Gal. #3 Fuel
1 Gal. #5 Fuel
1 Gal. #6 Fuel
=
=
=
=
=
136,000
138,500
141,000
148,500
152,000
1 lb. of Gas = 28" Water Column
1 lb. of Gas = 16 oz.
100 Cu. Ft. = 1 therm.
Conversions
Multiply
By
To Obtain
BTU/HR
Ft.
0.293
0.3048
0.00508
0.0929
0.0283
3.79
0.00379
9.81
25.4
W
m
m/s
m2
m3
L
m3
KW
mm
km
kg
Ft./min., fpm
Ft.2
Ft.3
Gallon (U.S. 231 in3)
Gallon
Horsepower (boiler)
Inch
Mile
Pound lb. (mass)
Psi
1.61
0.454
6.89
kPa
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Appendices
Innovative Designs, Built-to-Last
John Wood® Water Heaters are designed and built with innovative
features to ensure maximum quality, safety and reliability. Our heaters
are thoroughly factory tested, field-proven and meet or exceed industry
standards.
TankSaver®
The exclusive and patented TankSaver® design prolongs tank life.
TankSaver® impedes corrosion by guarding metal tank openings from
exposure and keeping them watertight. The durable construction
virtually eliminates rust.
American Society of Mechanical Engineers (ASME)
In June 2004, GSW Water Heating, Fergus plant became authorized by
ASME to build tanks in accordance with the ASME Boiler and Pressure
Vessel Code.
ASHRAE Efficiency Standard 90.1 1999
GSW Signature series commercial water heaters meet the ASHRAE
Efficiency Standard 90.1 1999. The burner efficiency of these units
is over 80%.
Certified Hydrostatic Tests
Design test pressure - 300 psi. Maximum working pressure - 150 psi.
NRCan Standard
All GSW/John Wood® residential water heaters meet or exceed NRCan
energy efficiency standards.
Coast-to-Coast Service & Support
I
n order to bring you unsurpassed quality and reliability after you’ve
purchased a GSW John Wood® product, we’ve created a number of
service and support resources to help take you through installation
and beyond. Operating hours are 8:00 a.m. to 6:00 p.m. EST for our
Technical Support call centre (1-888-479-8324), which is staffed by
technical experts who provide in-depth product support and
troubleshooting advice. We offer a wide range of hands-on training
programs from basic refresher courses to product-specific programs.
Our spare parts inventory carries a comprehensive supply of GSW
parts to help make repairs fast and easy.
72
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