EUROSTER FH2 – INSTALLATION AND OPERATION MANUAL
4. CONNECTING THERMOSTATS
The EUROSTER FH2 module can cooperate with room thermostats with voltage-free, normally
open (NO) output e.g. any thermostat manufactured by Euroster. Both wired and wireless
thermostats may be connected.
Having obtained a signal from the room thermostat of a given zone, the FH2 module switches
on the CH pump of this zone and the boiler output.
5. BOILER CONNECTION OUTPUT
The voltage-free BOILER output is used to switch on the heating source, e.g. gas-fired boiler. It
has 3 contacts marked as NC, COM, and NO. It withstands mains voltage of 230 V and load of
2A.
Usually, the boiler is connected to COM NO contacts (heating on when shorted, heating off when
open).
6. CONNECTING THE CH PUMP
Connect the CH zone pumps to “Pump 1” and “Pump 2” connections as shown in the picture. Pay
particular attention to the correct connection of PE conductors.
7. THERMAL PROTECTION
In the case of a system with underfloor heating, additional thermal protection (bimetallic circuit
breaker) must be used. Its function is to protect the underfloor heating system against
overheating. Exceeding the protection temperature results in switching the CH pump and boiler
off.
When using the controller in a standard heating system, the use of thermal protection is not
necessary. A jumper is preinstalled at the connection point of thermal protection.
CAUTION! The thermal protection is not included in the basic kit. Please order it
separately.
Connecting thermal protection cable
•Connect thermal protection cables to “TH Safety Termik 1” and “TH Safety Termik 2”
terminals. It is not necessary to observe cable polarization.
•Install the bimetallic circuit breaker at its intended location or the uncovered underfloor
heating system pipe.
•Put the bimetallic circuit breaker against the pipe, the side without a 50°C label facing
the pipe, fix it tight to the pipe with a hose clip and cover it with thermal insulation.
Caution! Failure to meet the above requirements may result in the malfunction of the
thermal protection.
Caution! There are hazardous voltages (phase potential of the system) present in the
thermal protection cables! In case of any damage to the cable, the controller must be
de-energized and the cable replaced.