SAT102
heat interface unit
4
Installation
The SATK series HIUs are 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 leakage from
any hydraulic component of connection.
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.
NOTE for all models:
If a non-return valve is fitted into the domestic hot water (DHW)
cold water inlet, provision MUST be made to accommodate the
expansion of the DHW contained within the HIU.
Preparation
After establishing the position where the HIU will be installed,
perform the following operations:
•
Mark the holes required for securing the HIU to the wall.
•
Mark the position of the water pipe connections.
Check the measurements again before installing pipework and
electrical cables.
Hydraulic connections:
1
connection to the pipework from the centralised boiler plant
2
domestic water circuit connection
Electrical:
1
electric supply line 230 V (ac) – 50 Hz
2
time clock/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)
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 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.
Filling the primary 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.
System start-up
Before using the HIU, visually check that the hydraulic
connections are water tight and the electrical wiring.
After completing the checks, switch on the electricity supply to
the HIU and check for the presence of any error signals.
If error signals are indicated, eliminate the fault using the
procedure described on page 6.
For HIUs with an integral pump the following applies;
Once the HIU is hydraulically filled (primary and
secondary), the HIU should be left permanently connected
to the mains supply and switched on. This allows the unit
to operate its pump anti-clog protocol.
