7
Figure 9
White – Boiler power (220 V)
Black – Circulation pump
If the power cable is damaged, replace it. Replacement must be done only by an authorized person.
The power connection should remain available after the final installation of the pellet boiler.
CAUTION
You must measure the flue gas emission after installing the boiler.
4.
NON-RETURN VALVE
The installation of the non-return valve in the hydraulic heating installation is mandatory.
The function of the non - return valve is to prevent cooling of the water in the boiler and condensation in the boiler
and flue pipes. The condensation can occur until you have spent 2 – 3 fuel tanks.
The condensation in the boiler is normal for the first ignition.
The non – return valve is installed at the outlet of the pump, behind the pump, not in front of the pump. Take care of
the valve installation direction. Also, when purchasing the valve, check if it is placed on horizontal line, on vertical line or as
inclined, because there are valves that are installed only horizontally or only vertically, or they are universal ones.
Check if the valve is easily opened (check with a finger) so that it could be opened with the pump’s power.
The non-return valve is placed behind each pump. If there are multiple pumps, you
will need multiple non-return valves.
The boiler connections are 1". So the non-return valve should be 1", or larger.
The warranty shall be void if the non-return valve is not installed!
The non-return valve installation diagram is as follows:
1. Grande 37 Lux boiler,
2. Circulation pump,
3. Non-return valve
4.1.
MIXING VALVE
Firstly, the reduced thermal power of the boiler will be used due to the high thermal power of the boiler, it is necessary to
fit the hydro installation with a built-in three-way mixing valve to avoid condensation of the boiler. This will extend the life of
the boiler.
A mixing valve is required for floor heating installations. We recommend special thermostatic valves for floor heating that
regulate the temperature of the water entering the floor up to 50ºC. If there is no such thermostatic mixing valve, the
temperature of the water entering the floor system must be regulated in some other way. It is the job of the designer and
installer.
The mixing valve should be 1".
white cable
boiler power
black cable
circulation pump
