Eco Heating Systems CB 105 HW, Инструкция по установке, обслуживанию и эксплуатации

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E93.1803.901 HW 30
Water quality
In direct water heating appliances, the water flows directly through the heat exchanger of the water heater.
Because all the time fresh water, containing dissolved minerals, is heated, scaling may occur. To prevent
this, water quality must meet a number of standards. The water must meet the specifications below:
Water temperature max. = 85°C
Maximum allowed water hardness should not exceed 196 PPM CaCO
3
(11 °dH). If the waterflow is en-
larged, a water hardness up to 250 PPM (14 °dH) is acceptable.
TDS (total dissolved solids) may not exceed 450 PPM
Water hardness and TDS together should not exceed 450 PPM
The pH value of the water may not be under 6,5 and not above 7,5 (measured cold)
If water hardness is too high a water softening system is necessary.
If TDS alone or the combined value is higher than the abovementioned, the water should be heated by
means of an indirect water heating appliance.
Minimum water hardness = 80 PPM or 80 mg/L CaCO
3
(= 4.5°dH)
Minimum TDS = 100 PPM
Water that’s under these minimum values normally has a pH value which is aggressive and corrosive.
If water quality doesn’t meet the above mentioned requirements, a water treatment installation should
be installed to improve water quality to the required levels, if possible
.
Flush the system with fresh water
When a water heater is installed in a new system or an existing installation the system must be cleaned before
the water heater will be used. The system should then be drained and thoroughly flushed with clean water to
remove any debris. The water of the water heater and heating circuit should be free of any particles, debris and
pollution.
De-Air sequence.
The De-Air sequence is a safety function starting at every power ON and is used to remove the air from the heat-
exchanger. The De-Air sequence does not start after a general reset (as the locking error reset or 24 hours reset)
The display will show ‘dAir’ indicating that the controller is performing the De-Air sequence to purge the heat
exchanger of air, by sequencing the water heater pump OFF and ON. The
installer/technician
can cancel the De-
Air sequence by pressing a specific key-button combination from the display.
The De-Air sequence consists of cycles.
▪
The general pump cycles in an ON/OFF pattern of 10 second periods. This is repeated for De-Air_Rep-
etition_Cnt times.
When the water pressure is too low, or the pressure sensor is in error, the De-Air sequence will be suspended
until the water pressure / sensor pressure is stable again.
The following scheme below shows the behavior of the general pump during one whole cycle of De-Air sequence
with a De-Air_Repetition_Cnt set to 2:
ON
Pump
OFF