Biopel MINI - Installation and Operation Instructions
45
Boiler regulation according to CH set temperature (60°C and above) and DHW set temperature and floor heating
(according to customer requirement).
All control elements and accessories are connected to the external socket, located in the front of the boiler.
Connecting pumps:
o
Connect the CH pump to the control unit at the CH pump output.
o
Connect the DHW pump to the control unit at the DHW pump output.
o
Connect the Valve1 pump (OT) to the control unit at the output of the Valve1 pump (OT pump, radiators).
Connecting temperature sensors:
o
Connect the DHW sensor to the DHW sensor output of the control unit.
o
Connect Valve1 sensor (OT) to the control unit at the Valve1 sensor output. (Valve1 sensor).
o
Connect the Return Water Sensor to the return (inlet) water pipe to the boiler and control unit at the Return
Sensor output. (Return water sensor).
o
Connect the Outdoor Temperature sensor to the control unit to the Weather sensor output. (Outdoor sensor).
o
Check the correct wiring of the CH temperature sensor, which is in the sink on the boiler outlet water funnel.
Connecting mixing valves:
o
Connect Valve1 (OT) to the control unit at the Valve1 output.
Basic parameter settings:
o
Set the CH temperature in the Main Settings, Set CH temperature.
o
Set the DHW temperature in the Main Settings, Set DHW temperature.
DHW heating activation:
o
Activate DHW Priority in Basic Settings, Operating Mode. The DHW pump will be activated independently of
the heating of the OT and PDL circuits, according to the set DHW temperature. The DHW hysteresis is set in the
service menu to 10°C and can be changed at any time.
o
On the Main Panel, top left, the DHW priority message is now displayed.
o
Note that the DHW pump will only be switched on if the current measured CH temperature is higher than the
current measured DHW temperature. This is to ensure that no colder water than the actual DHW boiler
temperature enters the DHW boiler.
o
When the set DHW temperature is reached, the DHW pump is switched off and the CH pump is activated at
the same time to ensure water circulation in the heating system.
o
The CH and DHW pumps will be switched on if the CH temperature exceeds 40°C. Set in Service menu, Pump
switch-on temperature.
o
The DHW pump will be switched on again after heating the DHW when the DHW temperature drops by the
value set in DHW Hysteresis in the Service Menu. The moment the DHW pump switches on, the CH pump
switches off.
Next, the mixing valve is activated. Continue as described below.
Activation and setting mixing valve 1 (OT):
o
Activate Valve1 (OT) in the Installation Menu, Built-in Valve 1.
o
Set the desired temperature on the valve in the Installation Menu, Built-in Valve 1, Valve Temperature.
o
The valve will now maintain this temperature. If the temperature is reached, the valve will close. There opening
is set from the factory to the minimum of 5%. Therefore, the valve will still be 5% open to ensure water flow in
the system. This setting can be changed.
o
Set the minimum return water temperature in the installation menu, built-in valve 1, Return water protection.
The minimum return water temperature is recommended by the boiler manufacturer at 55°C.
12.
Storage tank size determination
The use of a storage tank is not required for Biopel MINI boilers. If you wish to use one in your heating system, use
the formula below to calculate the correct size of storage tank for your boiler size.
Calculation of the smallest storage tank volume:
Vsp = 15 Tb x Qn (1-0.3 x (QH/Qmin)
