50
8.4 Clock function
Clock shown (P-on active)
T-on active
► In CH operation 6 periods can be programmed to switch from CH
o or CH on.
► In DHW operation 4 periods can be programmed to switch the
pre-heat function of the heat exchanger from on to o.
Additionally the following special modes can be chosen:
In CH operation
► P-on (Program on):
The boiler will respond only on CH demands within the
chosen time slots. If the clock program does not contain
any valid switching points, the boiler will remain in standby.
The actual time is shown on the le display indicating that
the clock program is active.
► T-on (Temporary on):
The clock program will be temporary overruled. The boiler will
respond to every CH demand until the next "o" switching point
(t-ON will be displayed on the le side).
► On (Continuous on):
The boiler will respond to every CH demand without any time
limit.
► O:
The boiler will not respond to any CH demand.
(Heating operation is subject to the room thermostat set
point and boiler flow target temperature, outside weather
compensation, if fitted, can restrict the flow temperature for
energy saving purposes, depending upon curve set-point and
outside temperature at that time ).
In DHW operation
► P-on (Program on):
The appliance's DHW comfort function is switched on
continuously within the chosen time slots. In this mode the
heat exchanger will be kept up to temperature to assure rapid
delivery of DHW. If the clock program does not contain any valid
switching points, the heat exchanger will continuously be kept up
to temperature.
► On (Continuous on):
The appliance's DHW comfort function is switched on
continuously. The heat exchanger will be kept up to temperature.
► Eco:
The appliance's DHW comfort function is self learning within the
chosen time slots. The appliance will adapt to the pattern of DHW
usage. As a result, the temperature of the heat exchanger will
not be maintained during the night or during long absence. If the
clock program does not contain any valid switching points, the
self learning feature is maintained.
► O:
The temperature of the heat exchanger is not maintained, as a
result of the delivery of domestic hot water takes slightly longer.
If you don't require rapid delivery of DHW then the comfort
function can be switched o.
Note
For setting and adjusting the clock and timer function see §9.2.
The boiler is equipped with a digital clock and oers the
possibility to program both CH and DHW operations separately.
To activate the clock program the following parameters have to be set:
For CH operation parameter P040 = 1 (This is factory set to 1 "active")
For DHW operation parameter P087 = 1 (This is factory set to 0 "Inactive")
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