Cointra CETI Serie Instructions Techniques page 62

1.5.1 ON and OFF
From the STANDBY mode, by touching the Standby key the unit
becomes OPERATIONAL, turning the display on. From OPER-
ATIONAL state, by touching the Standby key the unit goes to
STANDBY mode, turning the display off. In both cases an acous-
tic signal confirms each action.
In STANDBY mode the burner does not start when a tap is
opened.
1.5.2 NORMAL Operation
The water heater's NORMAL operation instantly provides do-
mestic hot water at the required temperature and set by the
user. When the water heater's normal operation is activated, the
real water outlet temperature is shown, and the
turned off.
1.5.2.1 Temperature Setting
The outlet water temperature can be set with the + or – keys.
The NORMAL temperature setting is between 35 °C and 50 °C
(the maximum value, initially 50 °C, can be changed via the nS
parameter, see Section 3.5). The normal temperature setting is
50 °C by default.
1.5.2.2 Domestic Hot Water
When the tap is opened and a water flow is detected by the flow-
meter, the unit begins to operate, and the
the display.
The fan symbol and the flame symbol
cording to the state they are in.
When the tap opens the bottom digits display shows the current
water flow rate ( ).
The water heater will heat water continually for a maximum of 60
minutes (value which can be changed via the nE parameter, see
Section 3.5), after which it will stop for safety reasons.
1.5.3 ECO mode
This mode is generally used to reduce energy consumption.
When this function is enabled the
top digits display.
In ECO mode the outlet capacity is limited to 80 % of the maxi-
mum value, and a separate temperature setting is used.
62
EN
1.5.3.1 Enabling ECO mode
If this mode is disabled, you must touch the ECO key. The
symbol will then light immediately on the display.
During this mode, when opening the tap the burner begins the
ignition sequence and when the electrode detects the flame, the
unit keeps the burner on and modulating the fan and the gas.
1.5.3.2 Temperature Setting in ECO mode
In this mode the water temperature setpoint can be different to
that in the NORMAL mode, but it will never be higher than it.
This ECO temperature setting, just like the NORMAL one, can be
changed with the + or – keys.
The ECO temperature setting is therefore between 35 °C and
the NORMAL temperature setting. The normal ECO temperature
symbol is
setting is 42 °C by default.
1.5.3.3 Disabling ECO mode
To deactivate this mode, touch the ECO key on the control panel.
The
1.5.4 Solar Energy Function
To operate the water heater together with solar panels and use
the solar energy they supply, there are some parameters that
define the water heater's behaviour. The water heater will only
activate when the inlet water temperature, produced by solar en-
ergy, is lower than the set temperature.
symbol lights on
In the description of parameters (see Section 3.5), FC must be on
"ON", as there are 3 other key parameters:
come on ac-
S1: Hysteresis to turn the burner on (°C)
S2: Hysteresis to turn the burner off (°C)
t1: Delay time to turn the burner on (seconds)
• When the inlet water T is < (setting T - S1), the burner starts the
• When the inlet water T is > (setting T + S2), the burner turns
Once the burner has ignited, for the first 30 seconds, to prevent it
from continuously going on and off when starting, the control unit
automatically increases the turned off T to the setting T + 30 °C.
symbol is shown on the
To change these parameters, S1, S2 and t1, see Section 3.5
Parameter list.
A73023712 - Rev. 00 - 2024-07
symbol goes off.
t1 timing, or the time after which the burner ignites.
off.
CETI