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28 | Operating Instructions
To access appliance HMI, procedure as follows:
▶ Remove front cover, see fig. 3.
▶ Press the button
The display shows the desired water temperature.
Fig. 24
Turn OFF
▶ Press the button
8.4
Temperature control
The temperature value indicated on the
display matches the pre-selected
temperature.
▶ Press the buttons
desired.
Fig. 25
Setting the temperature to the minimum value in accordance
with the requirements, reduces the energy, water consumption
and reduces the probability of mineral deposits (scale) in the
heat exchanger.
6 720 817 281 (2017/05)
.
6720806146-03.1V
.
and
until you reach the value
6720806146-04.1V
CAUTION: Severe burns!
The temperature indication on the display is
approximate.
▶ Always confirm with your hand before
bathing children or the elderly.
Setting the water temperature
The desired temperature of the hot water can be adjusted on
the front control panel of the heater.
The water heater has an electronically controlled gas valve that
modulates the burner input in response to both varying hot
water flow rates and/or changes in any incoming and outgoing
water temperatures.
Note: The water heater, running at minimum BTU, may still
achieve temperatures above the desired set temperature. Low
flowing fixtures are the leading cause of this type of
temperature overshoot. To combat this symptom, clean
fixtures or replace with higher flowing ones if necessary.
The water heater will not ignite if inlet water temperature
exceeds the set point temperature minus 1 °F (0.5 °C). In this
condition, the solar mode indicator will show on the display.
If the appliance does not ignite, this means that the desired set
temperature would be exceeded even running at minimum
BTU.
Solar mode/warm inlet temperature activation formula
Temp. inlet > [Temp. set - 1 °F (0.5 °C)]
Ex.: 111 °F (43.9 °C) > [112 °F (44.4 °C) - 1 °F (0.5 °C)]
Table 13
NOTICE: Appliance damage!
▶ This heater is not approved for
preheated water applications exceeding
140 °F (60 °C) for Residential
appliances or 180 °F (82 °C) for
Commercial appliances, in these cases
use a 3-way valve or mixing valve must
be installed before the appliance to
prevent water exceeding 140 °F (60 °C)
for Residential appliances or 180 °F
(82 °C) for Commercial appliances,
from entering the appliance.
Greentherm 9800 SEO 160/199 | SECO 199
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