John Wood Takagi - 910 - Manual (Page 20)

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DO NOT set to 185ºF if you use your 910
water heater in a recirculation system. This
will cause damage to the heater and void
the warranty.
1. Turn off power to the remote controller by pressing the
“ON/OFF" button.
Lamp is OFF to indicate that power is off
2. Simultaneously press and hold both the “HOT” and
“COLD” buttons for
at least five sec-
onds. And then
make sure “1” (or
“0”) is displayed on
remote controller.
“1” is displayed for
single units,
“0” is displayed for
Easy-Link/Multi-unit
Systems.
3. Press the “TIME” button. Make sure OFF and F1 are
displayed on remote
controller.
4. Press the “INFO” button. After, make sure “OFF” blinks.
5. Press the “HOT” button or the “COLD” button to set dis-
play to “on”.
6. Simultaneously press both the “BUZZER” button and the
“INFO” button to fix the setting.
7. Make sure display is no longer blinking.
8. Press the “ON/OFF” button to finish the setting.
9. Turn on power to the remote controller by pressing the
“ON/OFF” button again.
Lamp is ON to indicate that power is on
Flow
The flow rate through the 910 is limited to a maximum of
54.9 l/min (14.5 GPM (US)).
The temperature setting, along with the supply tempera-
ture of the water will determine the flow rate output of
the unit.
Refer to the temperature vs. gallons per minute chart on
pg. 42 to determine the likely flow rates based on your
local ground water temperature and your desired outlet
water temperature combination.
Based on the CAN/CSA P.7 test method for measuring
energy loss of gas-fired instantaneous water heater, the
910 is rated for 1794 l/hr (474 GPH (US)) or 29.9 l/min
(7.9 GPM (US)) for Natural Gas, and 1908 l/hr (504 GPH
(US)) or 31.8 l/min (8.4 GPM (US)) for Liquid Propane,
when raising the water temperature by 43C° (77F°) (from
14°C to 57°C (58°F to 135°F)).
Refer to the chart below for typical household plumbing
fixture flow rates to determine what the 910 can do in a
household application.
Household Flow Rates
Appliance/Use
Flow Rate
l/min GPM (US)
Lavatory Faucet 3.8 1.0
Bath Tub 15 - 38 4.0 – 10.0
Shower 7.5 2.0
Kitchen Sink 5.5 1.5
Dishwasher 5.5 1.5
Washing machine 15 4.0
Taken from UPC 2006
Freeze Protection System
This unit comes equipped with heating blocks to protect
it against damages associated with freezing.
For this freeze protection system to operate there has
to be electrical power to the unit. Damage to the heat
exchanger caused by freezing temperatures due to
power loss is not covered under the warranty. In cases
where power losses can occur, consider the use of a
backup power supply.
The freeze protection system will activate when the sur-
rounding and/or outside temperatures drop below 2.5°C
(36.5°F).
Freezing issues can occur if cold air enters through the
venting into the heat exchanger, whether by negative
pressures within the installation location or by strong out-
side winds. It is the installer’s responsibility to be aware
of these issues and take all preventative measures. The
manufacturer will not be responsible for any damage to
the heat exchanger as a result of freezing.
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