Flow Switch - aquatermic MCO18124D5812-05 Manual Del Usuario

1.4.2 External pump
T2: lower tank temperature
T3: upper tank temperature
Checks to be done to use the external pump:

parameter 14 has been configured;

the optional probe T6 has been electrically and hydraulically connected;

the external flow switch (optional) has been electrically and hydraulically connected;

an external pump (not provided) has been electrically and hydraulically connected.
When used for sanitary hot water circulation, the pump will start when the below conditions are satisfied at the same time:
1. Wired controller is ON;
2. T3 ≥ parameter 15+parameter 16;
3. T6 ≤ parameter 15‐5°C
The pump will stop when one of the below conditions is satisfied:
4. Wired controller is OFF;
5. T3 ≤ parameter 15‐2°C;
6. T6 ≥ parameter 15
When used for solar water circulation, the pump will start when the below conditions are satisfied at the same time:
1. Wired controller is ON;
2. T6 ≥ T2+parameter 17
3. T2 ≤ 78°C
The pump will stop when one of the below conditions is satisfied:
1. Wired controller is OFF;
2. T6 ≤ T2+parameter 18
3. T2 ≥ 83°C
Pump anti‐block function: when the pump stops for 12 hours, it will be forced to run for 2 min.
1.4.3 Flow switch
After the pump is running for 30 sec, if the water flow switch signal is checked to OFF for 5 sec, the pump stops. The pump will
restart after 3 min. If this malfunction occurs 3 times in 30 min, the pump can not start until the unit is re‐powered. The relating
error code will be shown on the controller. Only the pump will be stopped but not the unit itself.
1.4.4 Thermal protections
First step protection: when the tank water goes up to 85°C, the unit will stop and the relating error code will be shown on the
controller. This is an auto‐reset protection. When tank water temperature goes down, the unit can start again.
Second step protection: when the tank water keeps going up and reaches 90°C, the manual reset cut‐off will be active, the
electrical heater stops, unless you manual reset the protector.
To manual reset the protector, remove the front plastic cover and press the reset red button on the thermostat.
1.4.5 Disinfection weekly cycle
The heater will start each week at the setting time (parameter 13) automatically, regardless if the machine is on or off (in standby).
When upper tank temperature T3 ≥ TS3 (parameter 4), the heater stops. When T3≤TS3‐2°C, the heater starts.
The water temperature T3 is kept in range TS3‐2°C to TS3 for the set disinfection time t2 (parameter 5), then the unit quits the
disinfection.
The logic starts to calculate t2 only when T3 has reached TS3.
It's possible to set the interval between the disinfection cycles (parameter 21).
If the unit is "OFF"(and also if ON/OFF contact is opened), the disinfection starts with the same logic of "ON" unit.
1.4.6 Electrical heater
E‐heater turned ON or OFF condition 1:
(when the unit is turned on, and the E‐heater button on the control panel hasn't been turned on manually)
1. ON: when the tank water setting temperature TS1 (parameter 0) > 60°C and the lower tank water temperature T2 > 60°C;
OFF: when the lower tank water temperature T2 reaches the setting temperature TS1+1°C.
2. ON: when the ambient temperature ≤ ‐10°C or > 44°C;
OFF: when the ambient temperature ≥ ‐8°C or < 42°C.
3. ON: when there is high pressure or low pressure protection for 3 times in 30 min;
OFF: when the third time pressure protection occurs, the error code will be displayed, and this protection can not be
recovered unless powering off the supply. So the E‐heater keeps running to reach the setting temperature, then it is
switched off.
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