Eco-King HWB-299, Installation And Service Manual

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E93.1801EN171 HWB installation manual 30
Relevant variables:
Specific Parameters Level (Default) Value Range
De_Air_Config
0 = DAir disabled; 1 = DAir enabled.
2: Installer 0 0…1
De_Air_State 1: User - -
Current state of the DAir function.
DAir_Repetition_OnOff
Number of repeating ON/OFF.
2: Installer 2 0…255
DAir_Number_Cycles
Number of DAir cycles.
2: Installer 10 0…255
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
15 psi and the maximum pressure is 87 psi. The normal water pressure should be between 22 and 50 psi. Or 22
and 75 psi when the optional pressure relief valve is used. The pressure sensor will stop the water heater from
firing when the water pressure drops below 10 psi and starts the water heater firing again when the water pressure
reaches above 15 psi. 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 15 psi.
Higher pressure systems (e.g. using a water Booster Pump)
If a pressure higher than 87 psi
is
required for the heating system, the best solution is to separate the system from
the water heater by means of a plate heat exchanger. In this way, the water heater pressure can remain under 87
psi. (60 psi recommended)
ON
Boiler Pump
OFF
t