TESY HPWH 2.1 200/260 U02 Instructions D'installation Et De Maintenance page 25

9.2. Solar photovoltaic integration
One 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:
If the terminal "PV switch" is closed and TS1 manually adjusted (by display button) < "TS1 calc", the controller will
o
automatically switch to "TS1 calc".
If the terminal "PV switch" is closed and TS1 manually adjusted (by display button) > "TS1 calc", the controller will
o
automatically switch to TS1 manually adjusted
When the terminal "PV switch" is opened (there is no solar voltaic energy), the appliance will work in normal "heating
o
mode" described in 7.3.1.
Parameters for PV function:
Parameter
No.
35
0 Setting temp of water tank TS1
Temp difference to start heating
1
Only qualified persons should design and install photovoltaic system!
9.3. Installation of an external re-circulation pump and flow switch
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;
T3 (upper tank water temperature) ≥ parameter 15 + parameter 16
o
T6 (temperature of circulation water - thermosensor 18 – Fig. 8) ≤ parameter 15-5℃;
o
•
The pump will stop when one of the below conditions is satisfied:
o
The unit is on;
T3 (upper tank water temperature) ≤ parameter 15-2℃;
o
T6 (temperature of circulation water - thermosensor 18 – Fig. 8) ≥ parameter 15;
o
Parameters for recirculation pump function:
Code Description
14 Type of water pump
15 Setting circulation water temperature
16 The temperature difference to start the
circulation water pump
9.4. ON/OFF contact.
Parameter 35, must be set to "0"
When ON/OFF contact is closed, and the controller is ON, the unit can work and the running mode is decided by the
setting of the controller.
When ON/OFF contact is closed, but the controller is OFF, the unit can't work.
When ON/OFF contact is opened, but the controller is ON, the unit can't work (with the exception of external pump).
If the controller is ON, and the ON/OFF status is changed from opened to closed, the unit will work by the previous
settings of the controller (auto-restart).
Description
ON/OFF
TS6
Range
0: (remote on/off signal)
1: (PV function)
10～65℃
2～15℃
Range Default
0/1/2 0
35℃
15～50℃
1-15℃ 2℃
24
Default Remarks
0
50℃ Adjustable
5℃ Adjustable
Remark
0: no water pump
1: (circulation pump)
2: (solar water pump)
Adjustable
Adjustable