SATK22
10
A
B
C
Installation in the room
Use the cable outlet provided for connecting the remote user
interface to the electronic circuit board.
The chrono-thermostat function has to be enabled through the
remote control.
Refer to the dedicated user manual for the procedure.
Use of an external room thermostat
An external room thermostat, if installed, must be with
potential-free contact.
The external thermostat has to be connected to the terminals
“RT” shown in the adjacent figure.
The terminals can be accessed by removing the door on the
HIU electronic regulator (see page 22).
In case the thermostat function of the remote user interface is
enabled, any external thermostat will work in parallel
(management of different temperature zones).
Alternatively, when the thermostat function of the remote user
interface is disabled, the interface can be used to define the
hourly programming of the space heating function for all
thermostats connected to the terminal “RT”.
Refer to the user interface dedicated manual.
Commissioning
Filling the central heating system
Open the shut-off valves on the connections to the primary
heating system and the central heating system, proceed with
charging the system to the design pressure.
Once these procedures are complete, vent the system and
check the pressure again (repeat the filling process if necessary)
N.B
. during the procedures for venting/draining the system use
suitable measures to avoid the risk of any liquid dripping onto
the electronic components.
Once these procedures are complete, vent the system and
check its pressure again (repeat the filling process if necessary)
N.B.
during the procedures for venting/draining the system use
suitable measures to avoid the risk of any liquid dripping onto
the electronic components.
System start-up
Before starting the HIU, visually check the hydraulic
connections for any signs of leakage and all the electric
connections.
After finishing the check, switch-on the electric supply to the
HIU and check for the presence of any error signal.
If there are any, eliminate the fault indicated (see page 26) and
proceed with setting the set point of the domestic water and
heating cycles, programming the remote user interface
according to the desired temperatures and times, and checking
the operating cycles.
Commissioning Continued
Fitting the cover
Fit the cover on the HIU by inserting the pins (A) in the
locations provided (B).
Secure the cover by tightening the 4 screws provided (C).
EXP PORT
OTS
RT
PREPAID
AUX
RS-485 BUS
