Protherm 24(12) KTO Operation And Installation Manual - Boiler Control

9

Starting up the boiler 

Important:

 Putting the boiler into operati-

on and starting it up for the fi rst time must 

be performed by an authorised service 

only!

If you wish to start the boiler up after it has 

been put into operation, make sure that:

1 the boiler is connected to the electrical 

power supply;

2 all isolation valves (heating water, hot 

water, gas) underneath the boiler are 

opened;

3 the heating water pressure is within the 

recommended range of 1 – 2 bar

Turn the main switch (Fig. 1, position 1). 

After a short time the heating water tem-

perature appears on the display and the 

LED by the 

 symbol is lit (Fig. 1, position 

2). After ignition of the burner the LED by 

the symbol 

 is lit (Fig. 1, position 6).In 

the event of a safety boiler shutdown 

the red malfunction LED 

 is lit on the 

control panel (Fig. 1, position 5), and an 

error code appears on the boiler display. 

Unblock the boiler by pressing the RESET 

button (Fig 1, position 9). If safety shut-

down recurs after a short time again, or 

if the boiler cannot be unblocked by pres-

sing the RESET button, call an authorised 

service organisation.

Shutting the boiler down

Switch off the main switch (Fig. 1, position 

1).

If the boiler is to remain shut down for a 

longer period of time, close all cocks (hea-

ting water, hot water, gas) underneath the 

boiler. Shutting down the boiler must be 

performed taking into account the heating 

water temperature in the boiler and the 

surrounding environmental temperatu-

re in the given season of the year. In the 

case of danger that the boiler may freeze, 

discharge the water from the boiler, hea-

ting system and hot water distributors.

Starting up and shutting down boiler

Boiler control

Using the boiler without a room 

control unit

When running in this mode, the boiler 

maintains the selected heating water 

temperature. No room control unit is con-

nected, the terminals for its connection 

must be mutually interconnected (stan-

dard factory setting).

Setting procedure:

•  turn the main switch to the ON position;

•  set the required heating water tempera-

ture on the control panel.

Operation of boiler with room 

control unit

In the case that a room control unit is 

used, it is necessary to set the maximum 

Heating Water temperature for which your 

heating system has been designed, and 

which is capable of covering the thermal 

loss of the building even at low outside 

temperatures, on the control panel of 

the boiler (in order to prevent damage to 

the system). The process of heating the 

heating water can then be controlled by a 

control unit only up to the maximum value 

of the heating water you have set on the 

control panel of the boiler.

Note:

 Thermostatic valves should not be 

fi tted on the radiators in the room where 

the control unit is installed

Caution:

 The manufacturer does not 

accept responsibility for damage caused 

by faulty setting of the boiler or room con-

trol unit.