KEY RK-2001W2 Operation Manual

OPERATION MANUAL

RK-2001W2

SOLID FUEL FIRED

BOILER TEMPERATURE CONTROLLER

Version C112

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1. Application.

RK-2001W2 controller is a controller designed for temperature control of solid fuel fired
boilers. The temperature of the boiler is kept on level set by the user by controlling the
speed of the blow-in fan. The controller constantly monitors the temperature of water
in the boiler, displays it on the display and controlls the central heating pump. To
enable more precise temperature control of heated rooms the controller has been
equipped with an input for room thermostat connection. The controller is able to
control the pump loading tap water tank. The controller is equipped with extra
programmable multi-functional output, which allows connecting mixing valve, alarm
signal, extra boiler (gas or oil-fueled), emergency cooling system or other devices
turned on simultaneously with blow-in fan.

2. Connection.

Before turning on the controller by master switch, connect controller, fan and the
central heating pump power leads to appropriate sockets in the rear of the controller.
The temperature sensor should be placed in a measurement hole in the boiler.
Pictures 2 and 3. shows diagram of electrical connection of the controller.

CAUTION! Before plugging in the controller check if the wiring system is properly
grounded and if the terminal screws of the output connector are properly screwed.

CAUTION! Total power of the fan, central heating pump and hot water pump, which
are connected to the controller, musn't exceed 690W.

CAUTION! In case of connecting additional devices to the controller via UM-1 module,
these devices must be protected by appropriate fuses.

Outputs of the controller that are not used may remain unconnected.

3. Operation.

After turning the controller on all the elements of the display are lit for a while to check
if they are working properly. The controller, when power appears, returns to its last
state before turning off or power loss.

Front plate of the controller (picture 1) consists of:

1 - Master switch
2 - Display, indicating boiler temperature and parameters
3 - Room thermostat indicator
4 - Boiler thermostat knob
5 - Central heating pump indicator
6 - STOP/choose parameters/erase alarms button
7 - START/choose parameters button
8 - Start programming /confirm parameters settings button
9 - Hot water pump work indicator

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Picture 1. Front plate of the RK-2001W2 controller

Basic operation of the controller is carried out by setting the desired temperature with
boiler thermostat knob, other functions are carried out according to parameters
programmed in service mode. The change in the boiler temperature setting is
displayed on the display for a few seconds, e.g. [C 80] and this value means the
temperature of the water in the boiler which the controller will be trying to achieve. You
can also check this value by pressing OK button for a short time. After pressing
START button the fan starts to work and the control process begins. STOP button
stops the fan for example to add fuel.

If the controller is not in user or service mode the display shows water temperature in
the boiler and the last character on the display defines the mode which the controller is
currently in:
for example: [50º-] - STOP mode

[50ºC] - WORK mode
[50ºc] - hold up of burning in WORK mode
[50ºU] – heating of hot water in SUMMER mode
[70ºd] – total bacteria control – heating up of hot water

up to 75ºC.

4. Setting up the user parameters.

Holding OK button enters the user mode and allows to review and is indicated by fast
flashing of the room thermostat indicator. You can look through the parameters with <
and > arrow buttons. After choosing the desired parameter you can switch to the
change mode of the parameter by pressing OK button - it is indicated by the value of
the parameter flashing. Change of the parameter is done by pressing - or + buttons.
You can confirm new settings by pressing OK button and after that the controller
allows to choose another parameter (with < > buttons). If you do not want to change
the parameter value with the < or > button choose [End] and press OK or wait for 1
minute – the controller will exit the service mode and will indicate the temperature of
the water in the boiler.

CAUTION: If in the controller the hot water pump is turned off in the user menu. After
pressing OK, you can only read the set temperature value of the boiler thermostat.

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Table 1. User parameters list.

Disp. Parameter Min Max Step Factory

default

C 45 Boiler desired temperature. L 45 H 85 1°C L 45
co C Central heating pump work when „C” (pump off when „-”). - C C

cu u Heating up „d” - total bacteria control in hot water tank. u d u

50°C Water temperature in hot water tank.

End Exit from user mode.

4.1. Boiler water temperature.

The desired boiler temperature [C 45] – is the temperature which the controller will

try to achieve in WORK mode. It is set by direct turning of the knob and is indicated by
a short display.

4.2. Central heating pump work [co C] – WINTER/SUMMER mode – character „C”
indicates that the central heating pump is working. In summer time the heating can be
turned off by choosing the value “-“ with the (-) button which means turning off the
central heating pump.

4.3. Total bacteria control in the hot water tank [cu u] – heating up - the controller
allows to manually launch the total bacteria control process in which the boiler reaches
the temperature of 75°C in the hot water tank. In order to start the total bacteria control
process the boiler should be in WORK mode (this mode can be turned on by START
button). E.g. [70°d] will appear on the display. After reaching 75°C in the hot water
tank the controller will return to its state before choosing this option.

CAUTION: the total bacteria control function can switched on at night when the water
from the hot water tank is not used to prevent the users from burn injury.

4.4. Water temperature readout in hot water tank [ 50°] – this parameter shows the
measured temperature value in the hot water tank.

4.5. Exit from user mode – choosing the [End] on the display and pressing OK
button causes exit from the parameter setting. Exit from this mode will also occur if no
button is pressed for 1 minute.

5. Parameter setting – the service mode.

Holding OK button for more than 3 seconds enters the service mode where you can
review and change the parameters. It is indicated by flashing of the room thermostat
indicator. You can look through parameters with < and > arrow buttons. After choosing
the desired parameter (indicated by value of the parameter flashing slowly) you can
change the parameter value directly by turning the knob. The change of the value is
indicated by this value flashing. The change of the value will occur after pressing
– or + button. Pressing OK button will confirm the changes. After that the controller
allows to choose another parameter with < > buttons. If you do not want to change the