Eco Heating Systems CB 105 HW, Installation, Service And User Manual

Page: 30 / 147

E93.1803.901 HW 31
Relevant variables:
Specific Parameters Level (Default) Value Range
(149) De_Air_Config 2: Installer 1 0: 24 hour pump
1: Dair enabled
2: Dair disabled
De_Air_State 1: User - -
Current state of the DAir function. 1: User
DAir_Repetition_OnOff
Number of repeating ON/OFF.
2: Installer 2 0…255
DAir_Number_Cycles
Number of DAir cycles.
2: Installer 3 0…255
De-Air sequence duration
The total duration of the De-Air sequence depends on the selected De-Air settings. With the default settings for
De-Air the sequence takes 800 seconds to complete.
De-air for cascade systems
The de-air function is not available for cascaded systems. It is not possible to generate a burn demand for cascade
as long as the de-air cycle is busy. When using a cascaded system it is recommended to configure the de-air
function to either 24hr pump or disabled.
Water pressure
The installation should be designed and built to conform to all applicable regulations and standards, including the
right safety relief valves. IMPORTANT: Always keep the pressure in the water heater lower than the value at
which its safety relief valve opens.
Sensor
A water pressure sensor has been built into the water heater. The minimum water pressure in the water heater is
1 bar and the maximum pressure is 8 bar. The pressure sensor will stop the water heater from firing when the
water pressure drops below 0,7 bar and starts the water heater firing again when the water pressure reaches
above 1 bar. These values should never be changed in the water heater control settings.
The water heater cannot
be properly purged of air if the water pressure is less than 1bar.