John Wood Takagi - 710 - Manual (Page 3)

3
INTRODUCTION
Specifi cations
Model 710
Natural Gas Input
(Operating Range) Min: 24,000 Btu/h
Max: 240,000 Btu/h
Propane Input
(Operating Range) Min: 24,000 Btu/h
Max: 240,000 Btu/h
Gas Connection 3/4” NPT
Water Connections 3/4” NPT
Water Pressure 15 - 150 psi *
Natural Gas
Inlet Pressure Min. 5.0” WC
Max. 10.5” WC
Propane
Inlet Pressure Min. 8.0” WC
Max. 14.0” WC
Manifold Pressure
Natural: 2.35” WC
Propane: 3.55” WC
Weight 25.4Kg (56 lbs.)
Dimensions
H 600mm (23.6 in.) ×
W 470mm (18.5 in.) ×
D 226mm (8.9 in.)
Ignition Electric Ignition
Electric
Supply 120 VAC / 60 Hz
Consumption
Operation 112 W (0.93 A)
Standby 8.9 W (0.07 A)
Freeze-
Protection
187 W (1.56 A)
*40 psi or above is recommended for maximum flow
NOTE
• All references to the 710 also refer to the 710
ASME model
• Check the rating plate to ensure this product
matches your specifications.
The manufacturer reserves the right to discontinue, or
change at any time, specifications or designs without
notice and without incurring obligations.
• This manual provides information necessary for the
installation, operation, and maintenance of the water
heater water heater.
• The model description is listed on the rating plate which
is attached to the front cover of the water heater.
• Please read all installation instructions completely before
installing this product.
• If you have any problems or questions regarding this
equipment, consult with the manufacturer or its local rep-
resentative.
• Please read all installation instructions completely before
installing this product.
• The 710 is an on-demand, tankless water heater designed
to efficiently supply endless hot water for your needs.
• The principle behind the 710 Water Heater is simple:
Exhaust
Computer
Board
Thermistor
Water Control
Valve
Thermistor
Heat
Exchanger
Burner
Fan
Thermistor
Gas
Valve
Gas
Line Hot Water
Outlet
Cold Water
Inlet
Flow Sensor
*This diagram illustrates tankless water heater design con-
cepts only and is not accurate to the 710’s physical descrip-
tion.
A hot water tap is turned on.
Water enters the heater.
The water flow sensor detects the water flow.
The computer automatically ignites the burner.
Water circulates through the heat exchanger and then
gets hot.
The computer will modulate the gas supply valve and
water flow to produce the right amount of hot water at the
correct temperature.
When the tap is turned off, the unit shuts down.
SAFETY GUIDELINES
PLEASE READ THIS MANUAL CAREFULLY AND FOLLOW
ALL DIRECTIONS.
WARNING
Installation and service must be per-
formed by a qualified installer (for exam-
ple, a licensed plumber or gas fitter),
otherwise the warranty by the manufac-
turer will be void.
The installer (licensed professional) is
responsible for the correct installation
of your water heater and for compliance
with all national, provincial, and local
codes. •
•
General
1. Follow all local codes, or in the absence of local codes,
follow the most recent edition of CSA B149.1 Natural
Gas and Propane Installation Code.
2. Properly ground the unit in accordance with all local
codes or in the absence of local codes, with CSA stan-
dard C22.1 Canada Electrical Code Part 1.
1.
2.
3.
4.
5.
6.
7.