SATK20 & SATK30
15
Operating Cycles SATK30
Domestic water generation: DHW preheating function
The domestic water preheating function is signalled by the
flashing yellow DHW LED.
This function is less of a priority than any domestic water or
heating cycles.
Heating cycle
Modulating temperature regulation with compensated set
point - LOW temperature setting
The function is enabled by setting dip switch 1 to the OFF
position.
When the function is enabled, the flow temperature is modified
according to the temperature detected by the compensation
probe.
This keeps the actual thermal output of the under floor - and
therefore the ambient thermal load - under control. The
thermal response time of the system is thus minimised.
Safety and alarms
Error codes associated with faults signalled by the lighting up of
the FAULT LED are also shown on the display (see page 7).
Operating Cycles SATK30
Maintenance
All maintenance procedures should be carried out by an
authorised technician.
Regular maintenance guarantees better efficiency and helps to
save energy.
Before carrying out any maintenance, repair or part
replacement work, proceed as follows:
•
Switch off the electric supply
•
Remove the cover
•
Close the shut-off valves
•
Empty the HIU using the drain cocks provided.
Heat exchanger replacement
•
Remove the heat exchanger, loosening the 2 hex head
screws fixing it in place (A)
•
Replace the heat exchanger and the O-rings.
•
Tighten the two fixing screws (A).
NOTE:
The pins fixing the heat exchanger are positioned in such
a way as to allow it to be placed only in the correct direction.
Strainer cleaning
All HIU’s have a strainer on the inlet water from the
centralised heating system and for the SATK30103 and
SATK30105, a second strainer is located on the secondary
circuit.
To clean these strainers, carry out the following maintenance
procedure:
•
Unscrew the cap (B).
•
Remove the strainer mesh, flush thoroughly with clean
water to remove debris.
•
Replace the strainer mesh.
•
Screw the cap back into position.
1
OFF
60
4
A
A
B
