Temperature settings – John Wood Takagi - 910 User Manual
Page 21
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The manufacturer also highly recommends the use of a
back flow vent damper and/or converting the 910 to a
direct-vent unit to minimize the amount of cold air enter-
ing through the exhaust venting when the water heater
is off.
If you will not be using your heater for a long period of
time:
1. Completely drain the unit of water (refer to pg. 22).
2. Disconnect power to your heater.
This will keep your unit from freezing and being dam-
aged.
CAUTION
Only pipes within the water heater are pro-
tected by the freeze protection system. Any
water pipes (hot or cold) located outside the
unit will not be protected. Properly protect
and insulate these pipes from freezing.
Temperature Settings
There are 8 preset temperatures that you can select
from by changing the DIPswitch settings on the computer
board.
The temperature has been preset at the factory to 120ºF
(49ºC).
If you desire to change the set temperature with
DIPswitches, refer to the diagram on below. These tem-
peratures are available: 38°C, 46°C, 49°C, 57°C, 63°C,
68°C, 74°C, 85°C, (100ºF, 115ºF, 120ºF, 135ºF, 145ºF,
155ºF, 165ºF, and 185°F).
If you desire a hot water temperature other than the
8 preset settings, purchase the optional temperature
remote controller (Part No. TM-RE30).
With this optional remote controller you can set the tem-
perature from 38°C to 85°C (100ºF to 185ºF) with various
increments.
Please read the instructions carefully prior to installing
the remote controller, as failure to do so could damage
the temperature controller and/or the water heater, which
will void the warranty.
Turn off the power supply to the heater
before changing the DIPswitch settings.
Only change the switches with the dark
squares. The dark squares indicate
which direction the DIPswitch should be
set to.
DO NOT set to 85°C (185°)F if you
use your water heater in a recirculation
system. This will cause damage to the
heater and void the warranty.
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Upper bank of
DIPswitches
Lower bank of
DIPswitches
7-Seg LED
To change DIPswitch settings for temperatures, locate the
lower bank of DIPswitches to the right of 7-Seg LED.
DO NOT adjust the upper bank of DIPswitches.
The dark squares indicate the direction the DIPswitches
should be set to.
Temperature Settings (Lower bank)
38°C
(100°F)
46°C
(115°F)
49°C
(120°F)
DEFAULT
57°C
(135°F)
Switch
No. 1
ON
OFF
OFF
OFF
Switch
No. 2
OFF
ON
OFF
OFF
Switch
No. 3
OFF
OFF
OFF
ON
ON
6
5
4
3
2
1
ON
6
5
4
3
2
1
ON
6
5
4
3
2
1
ON
6
5
4
3
2
1
63°C
(145°F)
68°C
(155°F)
74°C
(165°F)
85°C
(185°F)
Switch
No. 1
ON
ON
OFF
ON
Switch
No. 2
ON
OFF
ON
ON
Switch
No. 3
OFF
ON
ON
ON
ON
6
5
4
3
2
1
ON
6
5
4
3
2
1
ON
6
5
4
3
2
1
ON
6
5
4
3
2
1