John Wood Takagi - 110-310-510 - Manual (Page 4)

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INTRODUCTION
This manual provides information necessary for the
installation, operation, and maintenance of the water
heater.
The model description is listed on the rating plate which
is attached to the front panel 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
representative.
This equipment is an on-demand, tankless water heater
designed to efficiently supply endless hot water for your
needs.
The 110, 310, & 510 models are to be installed indoors
only (direct-vent convertible).
The principle behind tankless water heaters is simple:
Exhaust vent
collar
Burners
Cold Water
Inlet
Fan motor
Thermistor
Hot Water
Outlet
Heat
exchanger
Thermistor
Flow sensor
Computer
board
Gas Valves
Gas
Inlet
Flow adjustment
valve
* This diagram illustrates tankless water heater design
concepts only and does not accurately represent to the
water heater’s physical description.
A hot water tap is turned on.
Water enters the heater.
The water flow sensor detects the water flow.
The computer initiates the fan motor and sends a signal
to the igniter to create an ignition spark.
The gas ignites and flames appear within the burner
chamber.
Water circulates through the heat exchanger and then
gets hot.
Using thermistors to measure temperatures throughout
the water heater, the computer modulates the gas and
water valves to ensure proper output water tempera-
ture.
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7.
SAFETY GUIDELINES
Safety Defi nitions
DANGER
Indicates an imminently hazardous situa-
tion which, if not avoided, will result in death
or serious injury.
WARNING
Indicates an imminently hazardous situa-
tion which, if not avoided, could result in
death or serious injury.
CAUTION
Indicates an imminently hazardous situa-
tion which, if not avoided, could result in
minor or moderate injury.
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 C22.1
Canada Electrical Code Part 1.
3. Carefully plan where you intend to install the water
heater. Please ensure:
Your water heater will have enough combustible air
and proper ventilation.
Locate your heater where water leakage will not
damage surrounding areas (please refer to pg. 6).
4. Check the rating plate for the correct GAS TYPE,
GAS PRESSURE, WATER PRESSURE and ELECTRIC
RATING.
* If this unit does not match your requirements, do not
install. Consult with the manufacturer.
5. If any problem should occur, turn off all hot water taps
and turn off the gas. Then call a trained technician or the
Gas Company or the manufacturer.
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