klover DIVA SLIM - Control of a Possible Three-Way Motorized Valve for DHW System Management; Connection to the Room Thermostat

DIVA SLIM PELLET BOILER STOVE
15
EN - Rev. 1.0
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 (see “System configuration”). In the left-hand technical
compartment of the appliance there are four wires with fastons protected by a red seal, which can be used for controlling
the valve (see also “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
On the left-hand technical compartment of 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 (see“System configuration”).
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 temperature in the boiler increases due to thermal inertia until it reaches the
temperature set with “SET H2O” and displays “T-H2O ECONOMY” on its monitor.
- The appliance now switches itself off automatically if at least one of the following
conditions occurs:
- If it remains in Economy mode Operation “T-H2O ECONOMY” for a time
set on Pr44 (20 minutes as default setting).
- If it exceeds the temperature differential set on Pr43 (set as default at
5°C), in other words if Temperature H2O > (“SET H2O” + Pr43).
- The appliance will switch on again automatically if both of the following conditions
occur:
- The contact of the room thermostat closes.
- If it goes below the temperature differential of the “SET H2O”.
If the above condition occurs during the switch-off cycle, please wait until the cycle is complete.
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.
CN16
BROWN
PUMP
BLUE
RELAY
T.A.
CONTACT
COUPLED
BOILER