16
Parameter No.
Description
Range
Default
Remarks
35
ON/OFF
0: (remote on/off signal)
1: (PV function)
0
0
Setting temp of water
tank TS1
10~65°C
50°C
Adjustable
1
Temp difference to start
heating TS6
2~15°C
5°C
Adjustable
Code
Description
Range
Default
Remark
14
Type of water pump
0/1/2
0
0: no water pump
2: (solar water pump)
1: (circulation pump)
15
Setting circulation water temperature
15~50°C
35°C
Adjustable
16
The temperature difference to start the circulation water
pump
1-15°C
2°C
Adjustable
Parameters for PV function:
Parameters for recirculation pump function:
O
nly qualified persons should design and install solar loop with all elements according to the Fig. 8!
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 cannot 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.
O
ne the heat pump detects the voltage of solar PV is higher enough to support heat pump running, the heat pump or e-heater will
be driven by solar PV, and the heat pump will also make the water setting temperature higher to have more hot water. PV switch
No19 (Fig.13) should be connected to the PV system. The logic of PV function is as follow:
•
When parameter 35 = 1, PV function is available as follow:
o
If the terminal “PV switch” is closed and TS1 manually adjusted (by display button) < “TS1 calc”, the controller will auto
-
matically switch to “TS1 calc”.
o
If the terminal “PV switch” is closed and TS1 manually adjusted (by display button) > “TS1 calc”, the controller will auto
-
matically switch to TS1 manually adjusted
o
When the terminal “PV switch” is opened (there is no solar voltaic energy), the appliance will work in normal “heating
mode” described in 7.3.1.
Only qualified persons should design and install photovoltaic system!
In case there is the possibility to re-circulate solar water or hot sanitary water, an external pump and flow switch must be connected
and installed hydraulically and electrically according to Fig. 8. If the flow switch is not present, short connect contact FS 17 (Fig.
13). The max available output for the pump is 5 A resistive. Also, the optional thermosensor 18 must be connected to the controller
and correctly positioned on the hydraulic plant (see the Fig. 8). The Parameter no. 14 must be configured by the installer (1= hot
sanitary water circulation).
The circulation of hot sanitary water is useful to avoid water becomes cold in the sanitary circuit if not used for several time. In this
way the hot water will be always ready when requested.
The logic of recirculation pump function is as follow:
•
The pump will start when the below conditions are satisfied at the same time:
o
The unit is on;
o
T3 (upper tank water temperature) ≥ parameter 15 + parameter 16
o
T6 (temperature of circulation water - thermosensor 18 – Fig. 8) ≤ parameter 15-5°C;
•
The pump will stop when one of the below conditions is satisfied:
o
The unit is on;
o
T3 (upper tank water temperature) ≤ parameter 15-2°C;
o
T6 (temperature of circulation water - thermosensor 18 – Fig. 8) ≥ parameter 15;
8.2.
Solar photovoltaic integration
8.3.
Installation of an external re-circulation pump and flow switch
Summary of Contents for HPWH 3.1 200 U02
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