Eco-King HWB-299, Installation And Service Manual

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E93.1801EN171 HWB installation manual 98
17 SYSTEM TEST.
For testing the system at fixed power rates, a system test can be activated via the Installer menu. Via the system
test the water heater can be started without CH or DHW being present. The system test has priority.
The following modes are available:
System test mode
Description
0 Not active System test mode not active
1 Fan only The fan is forced to run at maximum speed without starting the water heater
2 Low power The water heater starts and after the ignition period has finished the water heater stays at low
power
3 Ignition power The water heater starts and stays at ignition power
4 High power The water heater starts and after the ignition period has finished the water heater stays at high
power
5 High power limited The water heater starts and after the ignition period has finished the water heater stays at high
power limited by the parameter CH_ max_ power
6 High limit error test Simulates the Max_Temp_Error
7 Low water cut off 1 error test Simulates the LWCO_1_ Error
8 Low water cut off 2 error test Simulates the LWCO_2_ Error
Before running the system test modes first check if the heat can also be dissipated. Note that during this mode the
supply temperature can be raised above 203 ºF (95 ºC). When this temperature is reached the water heater will
switch OFF. When the supply temperature cools down to 194 ºF (90 ºC) the water heater will start again.
During the system test the water heater and system pump will be ON.
As the water heater will run at fixed power rates there is no setpoint control active.
Also the flame recovery is not active during system test demand. All other safety functions remain active.
The system test automatically stops after 10 minutes, after which the system continues with normal demand han-
dling. When the system test mode is changed during an active system test, the 10-minute timer is restarted.
Please note that for DHW Mode_7 and DHW Mode_8 the Actual_Flow_Rate must be higher than Flow_Rate_Start
+ Flow_Rate_Hyst in order that the board can go into system test.