Control Of A Possible Three-Way Motorized Valve For Dhw System Management; Connection To The Room Thermostat - NORDIC FIRE HRV VIKTOR Installation - Use - Maintenance

Control of a possible three-way motorized valve for DHW system management

The pellet appliance is equipped as standard with a control for a possible 3-way motorised valve to be installed on the
domestic water circuit based on the selected system type
appliance there are four wires with fastons protected by a red seal, which can be used for controlling the valve
"Wiring diagram"). The four wires have different colours, and precisely:
- Blue wire = 3-WAY VALVE COMMON (Neutral 230 V)
- Black wire = SANITARY SIDE (Phase 230 V with DHW demand)
- Black wire = HEATING SIDE (Phase 230 V with no DHW demand)
- Yellow/green wire = GND

Connection to the room thermostat

Behind the appliance there is a bridged terminal which is used to connect the room thermostat that will command the
operation. The operation of the room thermostat is enabled with system types 1, 2 and 3
N.B.: If the water temperature exceeds the set threshold of 80°C (safety temperature), the circulating pump of the
system is forcedly switched-on to ensure the disposal of excessive heat, thus avoiding high water temperatures in the
boiler. For this reason it is recommended that the heating system is not entirely closed.
In the configuration "System type 3", the appliance switches to economy mode and then switches off only if the "SET
BOILER" temperature setting has been reached.
ATTENTION: In the event that the room sensor in the "Remote control" for the appliance is enabled, the appliance
switches to economy mode if the "SET ROOM" temperature setting has also been reached.
PELLET BOILER STOVE HRV VIKTOR / HRV TORSBY
BROWN
PUMP
BLUE
OPERATING PRINCIPLE
Open contact:
- The appliance switches directly to economy mode operation "T-AMB
ECONOMY" thus minimising its operating power.
- The heating circulating pump of the appliance switches off.
- The appliance is switched off with a delay of 60 seconds.
The appliance will switch on again automatically if all of the following
conditions occur:
- The contact of the room thermostat closes.
- If it goes below the temperature differential (SET H2O – Pr43).
Once any cooling cycles are complete.
COUPLED
CONTACT
(see "System configuration"). In the right-hand inner part of the
17
EN - Rev. 1.0
BOILER
R.T.
(see"System configuration").
(see also