Technical data

Installation and Operation manual ETHOS 36C and ETHOS 54C –1511/05-issue1
Page 18
Programme
number
Programme description Setting range Default setting
Installer code 0 – 99 Installer code is 8
*J1 Max. CH supply temperature 10°C – 90°C 85°C
*J2 Max. CH heat output 30% en 99% 80%
*J3 Pump operation 0 = pump overrun time active
1 = pomp continuous
0
*J4 Pump overrun time for CH mode 0…30 min. 3 min.
*J5 Pump overrun time for DHW mode 0…30 min.. 1 min.
*J6 Step modulation 0= Step modulation, CH off
1= Step modulation, CH active; 5
minute steps
2= ditto, 10 minute steps
3= ditto, 20 minute steps
1
*J7 DHW temperature 55°C - 65°C 60°C
*J8 Max. DHW heat output 30% en 99% 99%
5.5.6 Programme number J6: Step modulation Control
This parameter can be used to increase the heat output in steps while heating the installation, so the appliance is
condensing continuously, generating a high efficiency. This step programme consists of 6 steps, each with an
adjustable interval:
J6- 0 = no steps, so on/off, based on the room thermostat
J6- 1= 6 steps, each with a 5 minute interval (factory setting)
J6- 2= 6 steps, each with a 10 minute interval
J6- 3= 6 steps, each with a 20 minute interval
With each step the heat output is increased with 20%, starting with the min. heat output.
The boiler will start with the lowest heat output and increase this with 20% every ’5, 10 or 20’ minutes until the
max. heat output is reached or the boiler ends this programme because the installation has reached the set
temperature.
a. When using an on/off room thermostat:
If there is no heat demand, this programme will count backwards with the same intervals until a renewed heat
demand is present; the appliance will then start with a heat output corresponding to the deducted interval.
Consequently, the boiler efficiency during heating will always be higher than 100% and the boiler will always have
an optimal heat output during the daytime period. This prevents undesirable fluctuations of the room temperature.
b. When using an ’OpenTherm®’ thermostat:
If the calculated water temperature of the thermostat is reached, the step programme will be stopped and the
’OpenTherm®’ thermostat will take over the boiler control. The boiler heat output is adjusted to the heat
requirement: the boiler will modulate optimally and a steady room temperature will be maintained
5.5.7 Programme number J7: Hot water temperature
Use this parameter to adjust the hot water temperature of the tap water between 55 – 65°C.
Table 7 parameter settings