Biopel MINI - Installation and Operation Instructions
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11.
HEATING SYSTEM CONTROL
Below you will can the most common examples of heating system connections with the Biopel MINI boiler. In addition, a
detailed procedure for the electrical connection and activation of the heating system control elements to the boiler control
unit is always given on the following page.
11.1.
One CH c DHW
Basic connection with one central heating circuit (controlled by CH pump) and one domestic hot water circuit
(controlled by DHW pump):
Protecting the boiler against low temperature corrosion by a thermostatic valve (50°C and above).
Boiler regulation according to CH set temperature (60°C and above) and DHW set temperature (according to customer
requirement).
All control elements and accessories are connected to the control unit located at the front of the boiler.
Connect the CH pump to the control unit at the CH pump output.
Connect the DHW pump to the control unit at the DHW pump output.
Connect the DHW sensor to the DHW sensor output of the control unit.
Set the CH temperature in the Main Setting, CH Set temperature.
Set the DHW temperature in Main Setting, DHW Set temperature.
Activate DHW Priority in Basic Settings, Operating mode.
The boiler will heat the DHW tank as the priority according to the set temperature (the DHW pump will be switched
on first until the DHW tank is heated to the set temperature).
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.
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.
The CH and DHW pumps will be switched on if the CH temperature exceeds 40°C. Set in Service menu, Pump switch-
on temperature.
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.
Connect the room thermostat to the control unit, to the outputs of Room controller 1 or 2 (room thermostat), or to
the RS output - depending on the type of thermostat selected. RT10 room thermostat is connected to the RS output.
Standard thermostat operating on an open/closed circuit basis is connected to one of the Room Controller 1 or 2
outputs.
Activate the Room Thermostat in the Installation Menu, Room Thermostat - Standard Thermostat 1 or 2, or OPOP
Controller (RT10 type) depending on the type of thermostat you are using.
PIPES LEGEND
75/55°C HEATING WATER SUPPLY PIPE
75/55°C HEATING WATER RETURN PIPE
EXPANSION PIPE
DEVICE LEGEND
K Automatic pellet boiler
ZP Pellet container
Č Heating water circulation pump
EN Expansion vessel
HVDT HYDRAULIC DYNAMIC PRESSURE
REGULATOR
OT HYDRAULIC CIRCUIT FOR
HEATING
ELEMENTS
PDL HYDRAULIC CIRCUIT
FOR FLOOR
HEATING
FITTING LEGEND
KK CAP - BALL VALVE
F
FILTER
TRS THERMOSTATIC TEMPERATURE TV REGULATOR
ZV CHECK VALVE
PV
SAFETY VALVE
BV
BALANCE VALVE
T
THERMOMETER
P
PRESSURE GAUGE
VKK DRAIN BALL VALVE
SUR BALL VALVE WITH LOCK FOR EN
TRV THREE-WAY CONTROL VALVE
KR
BOILER REGULATOR
PT
SPACE THERMOSTAT - REGULATOR
TRV THREE-WAY CONTROL VALVE
