Gas Tankless Water Heaters
RESIDENTIAL MODELS
Non-Condensing Concentric Vent
Fully modulating, gas fired, tankless water heater with sealed
combustion and power vented flue. Supplies hot water to
domestic hot water systems (directly or indirectly) and can be
used with water storage tanks, recirculation systems, and/or
combined domestic hot water & space heating applications.
Features
Designed for Performance
• Concentric vent design
• Field convertible from natural gas to propane
• Maximum flow rates up to 10.0 GPM
• Copper heat exchanger: 25x better heat transfer than
stainless steel thus stabilizing outgoing water temperature
quicker and reducing pressure drop across the heat
exchanger
• Easy-Link up to 4 units (no additional parts or accessories
needed)
• Multi-link up to 20 units (with a Multi-Unit Controller)
• Complies with lead free standards
Safety Features
• Built-in freeze protection
• Manual reset hi limit (up to 194°F)
• Overheat cutoff fuse
• Inlet and outlet thermistors for constant temperature
monitoring
• Air fuel ratio rod
• Flame sensor
Venting and Combustion
• 3”/5” direct vent APNC35 concentric vent system
• Vertical or horizontal vent termination installation
• 43’ max length, 4 elbows max (90° elbows = 5’ equivalent
length)
• Power direct vent
• Electronic ignition - no pilot light
JWT-110C-NI, JWT-310C-NI, JWT-510C-NI
(510C-NI models only)
ANSI Z21.10.3
WARRANTY
15-year limited warranty on heat exchanger in
residential applications
5-year limited warranty on heat exchanger in
commercial applications
5-year limited warranty on all parts
Consult installation manual for terms and conditions or visit
www.johnwoodwaterheaters.com for more information.
Gas Tankless Water Heaters
RESIDENTIAL MODELS
FLOW RATE vs TEMPERATURE RISE
*Maximum flow rate with set temperature above 131°F (55°C) is 8.0 GPM.
PRESSURE LOSS vs FLOW RATE
Gas Tankless Water Heaters
RESIDENTIAL MODELS
OPTIONAL ACCESSORIES
PART NUMBER
DESCRIPTION
100112156
Isolation Valve Kit
100209924
Remote Control
100113154
Product Preserver
100112691
Multi-Unit Controller
SUGGESTED SPECIFICATION
Water heater(s) shall be the fully modulating, non-condensing gas fired John Wood tankless water heater model ___________, having a maximum input rating of
____________ BTU/h. The heater shall have ¾” male NPT water and gas connections. The inlet gas supply pressures shall be _____ in. WC (minimum) up to _____ in.
WC (maximum) for _____ fuel. The heater shall incorporate an integrated temperature
controller that will provide diagnostic information, fault history, and heater set
temperature. The heater shall operate using 120V/60Hz power and will incorporate a factory-installed power cord.
The water heater(s) shall be direct vented with 3”/5” APNC35 concentric vent with a length not to exceed 43 equivalent feet, terminating horizontally or vertically with no
more than four (4) 90° elbows.
The water heater(s) shall use a commercial grade copper alloy, fin tube primary heat exchanger with quick release brass or bronze waterways. The heater(s) shall be controlled by
an onboard solid-state printed circuit board which uses thermistors to monitor inlet and outlet water temperature and exhaust temperature, a flow sensor to measure flow rate,
a flame sensor to monitor combustion, and an air-fuel ratio rod to measure and adjust operation in order to maintain optimal combustion efficiency. The heater(s) shall also
consist of inline fusing and surge absorbers for electrical surge protection, an electronic spark igniter, aluminized stainless steel burners, hi-limit temperature switch to monitor
water temperature, modulating gas valve, an overheat cutoff fuse, and incorporate ceramic heating blocks and an auto-fire system for freeze protection of the heat exchanger
and water piping.
The water heater(s) shall be design certified by CSA according to ANSI Z21.10.3 *CSA 4.3 and meet the energy efficiency requirements of NRCan and the current edition of
ASHRAE 90.1.
5-7/
Top view
Gas13-3/4”
Tankless
Water Heaters
(350 mm)
10-1/2”(266.5 mm)
RESIDENTIAL MODELS
SPECIFICATIONS
FUEL
TYPE
JWT-110C-NI
JWT-310C-NI
JWT-510C-NI
Natural
Natural
Natural
GAS CONSUMPTION INPUT
INLET GAS PRESSURE*
MINIMUM
BTU/h
MAXIMUM
BTU/h
MINIMUM
IN. W.C.
MAXIMUM
IN. W.C.
15,000
15,000
15,000
140,000
190,000
199,000
5.0
5.0
5.0
10.5
10.5
10.5
ENERGY
FACTOR
(EF)
0.82
0.82
0.82
FLOW RATE**
HOT/COLD
GAS
CONNECTIONS CONNECTION
@30°F RISE @70°F RISE
6.6
8
10
3.3
4.5
4.7
¾” NPT
¾” NPT
¾” NPT
¾” NPT
¾” NPT
¾” NPT
DIMENSIONS
IN (CM)
20-1/2” (520 mm)
MODEL
NUMBER
HEIGHT
WIDTH
DEPTH
20 ½ (52)
20 ½ (52)
20 ½ (52)
13 ¾ (35)
13 ¾ (35)
13 ¾ (35)
10 ½ (27)
10 ½ (27)
10 ½ (27)
UNIT
WEIGHT
LB (KG)
51 (23)
51 (23)
51 (23)
15-150 psi water pressure. 40 psi or above recommended for maximum flow.
*For Propane, minimum inlet gas pressure is 8.0 in. W.C. and maximum inlet gas pressure is 14.0 in. W.C.
**Current numbers based on factory testing; 0.5 GPM required for activation; 0.4 GPM required for continuous fire after initial ignition.
Models are certified from sea level to 10,100 ft. (3,078 m) elevations.
Front view
MODEL DIMENSIONS
Side view
CLEARANCES: TOP 12”, BOTTOM 12”, FRONT* 4” , BACK 0.5”, SIDES 3”
Top view
View
Top
120VAC
VAC
2-1/4”
(57 mm)
120
2-1/4”
(57 mm)
Hot 4-1/8”
(105.4
Hot 4-1/8”
(105.4mm)
mm)
Gas4-13/16”
4-13/16”
(122.1)
Gas
(122.1
mm)
Bottom View
Bottom
view
10-1/2”(266.5 mm)
13-3/4” (350 mm)
10-1/2”(266.5 mm)
1.0”(137.7
(25.5 mm)
5-7/16”
mm)
5-7/16” (137.7 mm)
1.0” (25.5 mm)
1.0” (25.5 mm)
20-1/2” (520 mm)
20-1/2”
(520 mm)
20-1/2”
(520 mm)
Front view
5-7/16” (137.7 mm)
10-1/2”(266.5 mm)
19-1/2”
19-1/2”
(495.7(495.7
mm) mm)
Top view
Top
13-3/4” view
(350 mm)
13-3/4” (350 mm)
7-9/16”
(192.3 mm)
Cold 1-5/8”
(42.0
Cold 1-5/8”
(42.0mm)
mm)
19-1/2” (495.7 mm)
5-7/16”5-7/16”
(137.7 (137.7
mm) mm)
5-7/16” (137.7 mm)
6-3/8”
(162.3 mm)
4-1/4”
(107.8mm)
5-11/16”
(145mm)
*Recommended 24” clearance from the front of the unit for maintenance.
Side view
5-11/16”
(145mm)
For Technical Information/Warranty:
Call 1-888-479-8324 or email techsupport@johnwoodwaterheaters.com
www.johnwoodwaterheaters.com
6”
m)
7-9/16”
6”
92.3
m) mm)
5-11/16”5-11/16”
(145mm)
(145mm)
4-1/4”
JWT47103 (10-17)
(107.8mm)
© 2017 Printed in Canada
”
m)
4-1/4” 4-1/4”
(107.8mm)
(107.8mm)
”6-3/8”
62.3
m) mm)
Front View
Sideview
View
Front
view Front view Side view Side
Download PDF
Similar pages