Radijator Inženjering d.o.o, 36000 Kraljevo, Živojina Lazića - Solunca br.6, Srbija
tel. +381 36 399 140, fax. +381 36 399 150, http://www.radijator.rs
e-mail: radijator@radijator.rs
91
Work principle:
Heating plant
Pump P1 is on if the temperature of water in the boiler exceeds the value Th20 of the thermostat, and the
buffer water temperature does not exceed the previously defined value Th79 and the difference between
the read temperature by probe S1 and S3 probes is greater than the
Th57
thermostat. The pump is on if
the water temperature in the boiler is higher than Th19 thermostat. In order to avoid freezing, the pump is
on if the water temperature in the boiler is below Th18 thermostat. If the temperature of water in the
boiler exceeds the value Th21 thermostat for safety reasons the pump is always on.
Sanitary plant
If the temperature in the sanitary water heater is lower than Th79 and if the temperature in the boiler is
higher than Th20 and the difference of temperature of water in the boiler and the sanitary water is Th57,
P2 valve is open. If the temperature of water in the boiler has reached the value Th21, P2 valve turns off.
Recommended values of parameters: Th18=5°C, Th19=65°C, Th20=50°C, Th21=70°C; Th57=5°C;
Th79=55°C.
Probe S1
Probe S3
Modality
Diff.
P2 Valve
Pump
P1
T<5°C
Heat. (OFF)
ON
5°C≤T<50°C
Heat. (OFF)
OFF
50°C≤T<65°C
T<55°C
<5°C
Heat. (OFF)
OFF
≥5°C
DHW (ON)
ON
T>55°C
<5°C
Heat. (OFF)
OFF
Winter
≥5°C
Heat. (OFF)
OFF
Summer
≥5°C
DHW (ON)
ON
65°C≤T<70°C
T<55°C
<5°C
Heat. (OFF)
OFF
≥5°C
DHW (ON)
ON
T>55°C
Winter
Heat. (OFF)
ON
Summer
<5°C
DHW (ON)
OFF
Summer
≥5°C
DHW (ON)
ON
T≥70°C
Heat. (OFF)
ON
Wiring:
Connect the output for DHW Temperature sensor to the connector as shown in the diagram.
Connect the output for Buffer temperature sensor to the connector.
Connect Pump P3 to the connector as shown in the diagram.
Connect the Electro valve to the connector as shown in the diagram.
Parameters:
They are factory-set.
The following parameters are found in the System menu, submenu Enables:
P26 [selection of configuration] =10;
P75 [
DHW Temperature sensor
] =8;
P76 [
Buffer temperature sensor
] =9;
P36 [pump configuration] =14
