2.13.1 External Sensor; 2.13.2 Chrono-Thermostat Or Air Thermostat; Example Of Use Of The Command/Control; Device On Some Types Of Heating Systems - Sime Brava One HE 25 ErP Manual De Instalación Y Mantenimiento

d
IT IS FORBIDDEN
To use water pipes for earthing the appliance.

2.13.1 External sensor

The boiler is prearranged for connection to an external air
temperature sensor and can operate with a sliding temperature.
This means that the delivery temperature sent to the boiler can
vary on the basis of the external temperature depending on the
climatic curve selected from those shown in the diagram (Fig.
22).
When fitting the sensor on the outside of the building, follow
the instructions provided on the packaging of the product itself.
Climatic curve
Delivery temperature
°C
90
K=9
80
70
60
50
40
30
20
20 15 10
m
CAUTION
If there is an external sensor, turn the heating knob
t until the required curve K has been selected within
the range K=0.0 - K=9.0 in order to select the optimal
climatic curve for the system and therefore the delivery
temperature based on the external temperature.

2.13.2 Chrono-thermostat or Air Thermostat

The electrical connection of the chrono-thermostat or air
thermostat has already been described. When fitting the
component in the room where the readings are to be taken,
follow the instructions provided on the packaging of the product
itself.
2.13.3 EXAMPLE of use of the command/control device
on some types of heating systems
KEY
M System delivery
R System return
CR Remote control
SE External sensor
TA Air thermostat for boiler activation
TZ1÷TZ3 Air thermostat for the zone
VZ1-VZ3 Zone valves
RL1-RL3 Zone relays
P1-P3 Zone pump
TSB Low temperature safety thermostat
80
K=8 K=7 K=6 K=5
5 0 -5 -10 -15
External temperature
ONE DIRECT ZONE system , external sensor and air thermostat.
SE
CR TA
K=4
MULTI ZONE system - with zone valve, air thermostat and
external sensor.
K=3
K=2
TA
K=1
SE M
R
°C
-20
Fig. 22
m
CAUTION
Set the parameter "tS 1.7 = DELAY SYSTEM PUMP
ACTIVATION to allow the opening of zone valve VZ.
MULTI ZONE system - with pump, air thermostat and external
sensor.
TA
SE M R
SP
M R
TZ1 TZ2
VZ1 VZ2 VZ3
TZ1
TZ2 TZ3
RL1
RL2 RL3
P1 P2
EN
Fig. 23
TZ3
Fig. 24
P3
Fig. 25