SATK20 & SATK30
5
Room thermostat
Preparation
The whole system should be thoroughly flushed to remove any
debris that may be in the supply pipework to the HIU and to
the domestic hot water and heating pipework in the apartment
before connecting the HIU.
Fix the HIU to the wall
N.B.
: the wall anchors (not supplied) can only guarantee
effective support if inserted correctly (in accordance with good
technical practice) into walls built using solid or semi-solid
bricks. If working with walls built using perforated bricks or
blocks, mobile dividing panels or any masonry walls other than
those indicated, a preliminary static test must be carried out on
the support system.
Isolation Valves
Depending on the specification ordered, the HIU may be
supplied with a variety of isolation valves. We recommend that
all connections are fitted with isolation valves to allow any
maintenance work to be carried out.
We would also recommend that the primary system includes a
flushing bypass, with an isolation valve, immediately upstream
of the HIU, to allow the primary system to be flushed prior to
the first operation of the unit.
Electrical Connections
Make sure that the electrical system can withstand the
maximum power consumption of the appliance, with particular
emphasis on the cross-section of the cables.
If in doubt, contact a qualified technician to thoroughly check
the electrical system.
Electrical safety of the appliance is only achieved when it is
correctly connected to an effective earthing system,
constructed as specified in current safety regulations. This is a
compulsory safety requirement.
Connection to the main supply
The device is supplied with an electric supply cable - plug not
supplied.
The device should be electrically connected to a 230 V (ac)
single phase + earth mains supply using the three-wire cable
marked with the label as specified below, observing the LIVE (L)
- NEUTRAL (N) polarities and the earth connection.
This line must be connected to a circuit breaker device.
Connection to the timeclock/thermostat
The SATK series HIU includes a connection, suitable for a time
clock/thermostat, allowing the tenant to control individual
apartment heating requirements
The connection to this device (potential-free contact) must be
made with the two-wire cable marked with the label as
specified below.
Should it be necessary to extend this cable, use one with the
same cross-section (max 1 mm²) and maximum length 30 m.
First Operation
Filling the central heating system
Open the isolation valves on the connections to the
centralised boiler plant to fill and pressurise the system to the
design pressure.
Once completed, vent the system and check the system
pressure again, repeat the filling process if necessary.
Filling the secondary circuit (SATK30103 & SATK30105 only)
The SATK30103 and SATK30105 HIUs are fitted with a filling
loop complete with double check valve and isolation valves.
The first time the system is filled, or for re-pressurising
following a heating circuit pressure switch fault indication,
restore the system pressure (1.2 to 2 bar) by opening the cock
(A) and monitoring the value using the pressure gauge (B).
Once the correct pressure has been reached, close the cock
(A), vent the system and check its pressure again, repeat the
filling process if necessary.
NOTE:
For UK markets, a filling loop is supplied in lieu of the
back-flow preventer.
Electrical supply:
230 V(ac) ±10% - 50 Hz
A
B
