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ECOTHERM
Heat transfer solutions
®
Operating Instructions High Capacity Water Heaters Models EHRE/EHPE & EDRE - ELC 11
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strong rinsing of the heat exchanger with cold water in order to remove the residual heat of it in shortest time.
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Complete integration and supervision of the flushing times and temperatures in the microprocessed
flushingprogramm of the ELC11-controll of the ECOTHERM High Capacity Water Heaters.
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An optional activation or deactivation of the external flushing. At deactivated external flushing, the usual internal
flushing comes into force if requested.
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Minimum flushing duration 0 seconds, maximum 99 seconds - free programmable in the standard exscaling
programm of the ELC11-control of the ECOTHERM High Capacity Water Heaters.
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Delayed and supervised closing and opening of the 4 external flushing valves in order to guarantee the optimal
effectiveness of the eCotHerM High Capacity Water Heaters certainly and reliably.
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Continuous detection of the engine valves and automised alarm release with errorlamp at the factory master
control system in order to avoid eventually hot water misallocations at an improbable failure of one of the
components.
10. External cold water exscaling (optional)
the external exscaling of the eCotHerM High Capacity Water Heaters has
got the following function features in order to guarantee the highest possible
protection against pollution of the heat exchanger:
external cold water exscaling
Functional routine:
As soon as „Flushing“ is shown on the Display of the ELC-control, both engine valves between boiler and heat
exchanger are closed. If both valves are closed then the engine valve of the cold water intake opens first and after-
wards time-delayed the engine valve of the cold water outtake. The duration of how long the cold water valves stay
open respectively the requested temperature in the heat exchanger, can be setted up in via the ELC11-control. After
expiration or the duration (standard 10 sec.) the cold water output closes first and afterwards the cold water input. After
a standstil of 3 minutes the process will be repeated until the requested temperature in the heat exchanger is reached.
At „SYSTEM OFF“: (Control unit input X13 is open, control unit inpout X14 is closed) No flushing of the system even if
the heat exchanger is still warm.
at „HeatinG“: open both engine valves between boiler and heat exchanger, at about 20 % opens the input X14 and
closes consequently the flushing valves, at about 80 % X13 will be closed. Herewith the pumps and the control unit are
released and the system turns into the operating condition „HeatinG“.
at „stanDBY“: after the end of charging the pumps stop and the control unit and the boiler valves get closed.
Function of the final circuit input at the control ELC11:
Input X13 (S4/6 of the actuators) releases closely the pump (Boiler valves open).
Input X14 (S1/3 of the actuators) releases closely the cold water pump (Boiler valves closed).
If both inputs are closed it causes the failure alert „Fault flushing function“.
Advantages of an external cold water flushing:
The residual heat is removed from the heat exchanger shortly, without influence of the temperature lamination in the
boiler. Because of the lower temperatures of the separate cold water connection is a faster cooling as by the internal
exscaling not possible.
Connecting dimensions:
For an external cold water exscaling you need 1 cold water supply 1/2“ (max. 6bar) and one cold water discharge.
figure 44
