4
Installation
The SATK series HIU is designed for installation in a sheltered
domestic environment (or similar), therefore cannot be installed or
used outdoors, i.e. in areas directly exposed to atmospheric
agents. Outdoor installation may cause malfunctioning and
hazards.
If the device is enclosed inside or between cabinets, sufficient
space must be provided for routine maintenance procedures. It is
recommended that electrical devices are NOT placed underneath
the HIU, as they may be damaged in the event of safety relief valve
activation if not connected to a discharge tundish, or in the event of
leaks occurring at the hydraulic fittings. If this advice is not heeded,
the manufacturer cannot be held responsible for any resulting
damage.
In the event of a malfunction, fault or incorrect operation, the device
should be deactivated; contact a qualified technician for
assistance.
Preparation
After having established the point where the device has to be
installed, perform the following operations:
· Mark the holes required for securing the HIU to the wall
· Mark the position of the hydraulic connections
Check the measurements again and begin laying the following
lines:
• Hydraulic:
1. connection to the central system line
2. heating circuit connection
3. domestic water circuit connection
4. conveyance of safety relief valve and charging unit backflow
preventer discharge
• Electric:
1. 230 V (ac) – 50 Hz electric supply line
2. chrono-thermostat/thermostat line (potential-free)
3. centralised bus line for heat meter data transmission (if required)
4. centralised electric supply line for heat meter (if required)
Before installation, it is recommended to carry out accurate flushing
of all the pipes of the system in order to remove any residue or
impurities that could endanger correct operation of 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.
Electric 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 you have any doubts, contact a qualified technician to request a
thorough check of 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.
Heat meter installation
The HIU is designed to fit a compact heat meter (with incorporated
return probe) with 1” threaded connections and 130 mm gauge.
Before carrying out any maintenance, repair or part replacement
work, proceed as follows:
- cut off the electric supply
- remove the cover
- close the shut-off valves
- empty the HIU using the drain cocks provided
- remove the template (A)
- remove the cap (B)
- install the flow meter on the return pipe
- install the flow probe in the M10 pocket (B).
Please refer to the heat meter technical data sheets for further
information.
Connection to the main supply
The device is supplied with an electric supply cable which is not
fitted with a plug.
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.
A
B
