Controller for a coal dust boiler, top-loading YETI 2

THE YETI 2 CONTROLLER IS THE DIRECT SUCCESSOR OF THE YETI CONTROLLER, HAVING THE SAME FUNCTIONS.

One of the most reliable controllers on the market. The microprocessor YETI controller is designed to control the operation of the blower and circulation pump in central heating installations, and has an output for connecting remote control.

The most important functions of the YETI controller:

Smooth blower speed regulation
The YETI controller allows setting the maximum and minimum blower speeds, which enables precise adjustment of the power with which the blower will operate.
Gradual activation of the blower from minimum to maximum speeds extends the motor's lifespan and prevents sudden ignition of gases accumulated in the boiler (so-called popping). Competitor controllers have only one parameter responsible for blower power – with YETI we can set minimum and maximum speeds.

Fuel control
This function works by reducing the blower speed to a minimum when the controller detects a temperature drop despite the blower being on. Reducing the blower speed does not cause excessive cooling of the central heating boiler. This function activates after 30 minutes if the set temperature has been reached, or after 2 hours if the set temperature has not been reached (ignition mode – 2 hours).

Anti-freeze function
Below 5°C, the controller turns on the circulation pump, which delays freezing of some parts of the central heating installation (the most vulnerable).

Anti-stop function
After the heating season, every 14 days the circulation pump is turned on for 1 minute – this prevents the pump from seizing during the summer period – the function works when the controller is turned on.

Automatic setting retention
The controller has automatic retention of settings in case of power failure, and resumes the previously performed operation after power is restored.

Return to factory settings
The controller can be reset to factory settings. This function is useful when the controller is misadjusted by inexperienced operators.

Automatic emergency thermostat
An external thermostat (emergency thermostat) serves as protection against overheating of the installation, which may result from controller failure or improper operation. It is a special element that cuts off power to the blower at a boiler temperature of 90°C.

User-programmable parameters
Purge time, pause time between purges, maximum and minimum blower speeds, circulation pump activation temperature, controller shutdown temperature.

Installer-programmable parameters
Besides the configuration mode available to every user, the YETI controller has a special mode that allows setting service parameters (additional service manual).
The service mode allows programming:
blower characteristics – thanks to this parameter, our controller can work with any blower available on the market (up to a specified max. power)
blower power during purge – we decide at what power the blower should operate during the purge
blower speed reduction range – how many degrees before the set temperature the blower speed should be reduced
minimum boiler temperature


REMOTE CONTROL OPTION

A remote control panel or room thermostat can be connected to the YETI controller. Connecting a remote panel allows the controller to operate in two modes: room and boiler. Connecting a standard room thermostat allows maintaining the set temperature in the room. Thanks to remote control, we can maintain a constant room temperature, which saves up to 30% of fuel.

TECHNICAL DATA

Hysteresis - 1°C
Blower speed reduction range - 6 °C
Response time - 30 min.
Circulation pump activation temperature - 25-70 °C
Temperature setting range - 35-90 °C
Purge time - 5-59 s (can be disabled)
Time between purges - 1-30 min
Maximum blower speed - 12 steps
Minimum blower speed - 1 step
Controller shutdown temperature - 25-50 °C
Emergency thermostat activation temperature
external hardware - approx. 90 °C
internal hardware emergency thermostat activation temperature - approx. 93 °C
software emergency thermostat activation temperature - 92 °C
Ambient temperature during controller operation - 5-45 °C
Power supply voltage - ~230 V
Temperature sensor operating range - 1-100 °C
Pump output load (~230 V) - 100 W
Blower output load (~230 V) - 100 W
Controller power consumption - 2 W
Pump activation at low temperatures - below 5 °C
Pump activation every 14 days for 1 minute - prevents pump seizure after the heating season (this function works only if the controller is on)
Controller dimensions (length, width, thickness) - 145 x 75 x 40 mm
Wall mounting hole spacing - 161 mm

Product safety information Manufacturer information