SATK20 & SATK30
6
System start-up
Before switching on the HIU, visually check all joints are water
tight and the electric wiring is complete and correct. After
finishing the check, activate the electric supply to the HIU and
check for the presence of any error signals.
If any error signals are indicated, eliminate the faults indicated
and proceed as described below, setting the domestic water
temperature and the heating controller to the desired
temperatures and times. Check that the operating cycles are
correct.
Fitting the cover
Place the casing over the frame, inserting the upper tabs (1) into
the corresponding slots (2).
Place the lower part of the casing over the frame.
Tighten the screws (3).
Heat meter installation
The HIU is designed to include a compact heat meter.
Before carrying out any maintenance, repair or part
replacement work, proceed as follows:
•
cut off the electric supply
•
remove the cover
•
close the isolating valves
•
empty the HIU using the drain cocks provided
•
remove the spacer piece (A)
•
remove the blanking plug (B)
•
install the flow probe in the 1/4” pocket (B) provided
•
install the flow meter on the return pipe.
Please refer to the heat meter technical data sheets for further
information.
Heat meter installation
Electronic Controller
Operating Principle
All heating and domestic hot water functions offered by
SATK20 and SATK30 HIUs are controlled by a digital
controller.
The controller is factory set with different parameters and
settings depending on the model (Table 1).
There are a number of specific DIP SWITCHES on the
controller circuit board; the way these are configured will
determine the settings of the various models and the optional
functions enabled.
User Interface
The user interface, built into the PCB, consists of the following
devices.
•
Indicator LED
The various functions and faults are signalled by either
flashing or permanent illumination of the LEDs.
A
B
3
2
1
ON
Electric supply 230 V (ac)
DHW
Domestic hot water ON
CH
Heating ON
FAULT
Fault detected
6 5 4
2
3
1
