Sime VERA HE 25, User, Installation And Servicing Instructions

Page: 67 / 84

67
EN
6.13.2 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.
6.13.3 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
ONE DIRECT ZONE system , external sensor and air
thermostat.
R
M
SE
TA CR
Fig. 32
MULTI ZONE system - with zone valve, air thermostat and
external sensor.
TA
TZ1
VZ1 VZ2 VZ3
TZ2 TZ3
SE R M
Fig. 33
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
TZ2
TZ3 TZ1
P3
RL1
SP
RL2 RL3
P2 P1
R
M
Fig. 34