CALEFFI Altecnic SATK20 Guide

SATK20 & SATK30
heat interface unit
Installation Operation & Maintenance Instructions

SATK20 & SATK30
1
These instructi ns must be read and underst d
bef re installing and maintaining the HIU.
CAUTION! FAILURE TO FOLLOW THESE
INSTRUCTIONS COULD RESULT IN A SAFETY
HAZARD!
1The device must be installed, commissioned and
maintained by qualified technical personnel in accordance
with national regulations and/or relevant local
requirements.
2If the device is not installed, commissioned and maintained
correctly in accordance with the instructions provided in
this manual, it may not work correctly and may endanger
the user.
3Flush the pipework thoroughly before installing the HIU to
remove any particles, rust, incrustations, limescale, welding
slag and any other contaminants.
The water circuits must be clean and free from debris.
4Make sure that all connection fittings are watertight.
5When connecting water pipes, make sure that threaded
connections are not mechanically overstressed. Over time
this may result in breakage, causing water damage and/or
personal in ury.
Content
Function and product range 1
Safety instructions 1
Dimensions and technical specification 3
Installation 4
First operation 5
Electronic controller 6
Safety and alarms 7
SATK20103 and SATK20203 components 8
SATK20303 components 10
SATK30103 components 12
SATK30105 components 12
Maintenance 14
Electric connections 16
Trouble shooting and solution 17
Product Range
SATK20103 Direct wall-mounted HIU for LOW temperature
heating, instantaneous domestic hot water
production.
SATK20203 Direct wall-mounted HIU for MEDIUM
temperature heating, instantaneous domestic
hot water production.
SATK20303 Direct wall-mounted HIU for HIGH temperature
heating, instantaneous domestic hot water
production.
SATK30103 Indirect wall-mounted HIU, instantaneous DHW
production - with 50 kW heat exchanger.
SATK30105 Indirect wall-mounted HIU, instantaneous DHW
production - with 75 kW heat exchanger.
Safety Instructions
SATK20
SATK30
Function
SATK20 and SATK30 Heat Interface Units (HIU) control the
heating and domestic hot water generation in an individual
apartment within a centralised boiler or district heating system.
NOTE: Due to the specification ordered, or the country of
destination, the actual unit may differ from those shown.
WARNING

SATK20 & SATK30
2
General Information
•Please leave the manual as a reference guide for the user.
•Dispose of any packaging in an appropriate manner, most
of which can be recycled.
•In this Installation, Operation and Maintenance guide we
have endeavoured to make the information as accurate as
possible.
We cannot accept any responsibility should it be found
that in any respect the information is inaccurate or
incomplete or becomes so as a result of further
developments or changes to the products.
Key to SymbolsSafety Instructions
6Water temperatures higher than 50˚C may cause severe
burns. When installing, commissioning and maintaining the
device, take the necessary precautions so that these
temperatures will not be hazardous for people.
7In the case of particularly hard or impure water, there must
be suitable provision for filtering and treating the water
before it enters the device, in accordance with current
legislation. Failure to do so may result the HIU becoming
damaged or working incorrectly.
8Any use of the HIU other than it’s intended use is prohibited.
9Any coupling of the device with other system components
must be made while taking the operational characteristics of
both units into consideration.
10An incorrect coupling could compromise the operation of
the device and/or system.
NOTE: Risk of electric shock. Live parts. Shut off the electric
supply before opening the HIU cover.
1During installation and maintenance operations, always
avoid direct contact with live or potentially hazardous parts.
2The device must not be exposed to water drops or humidity,
direct sunlight, the elements, heat sources or high intensity
electromagnetic fields.
This device cannot be used in areas at risk of explosion or
fire.
3The device must be connected to an independent bipolar
switch. If work has to be done on the device, switch off the
electric supply first. Do not use devices with automatic or
time reset, or which may be reset accidentally.
4Use suitable automatic protection devices in compliance
with current legislation.
5The device must always be earthed before it is connected to
the electric supply. If the device has to be removed, always
disconnect the earth connection after disconnecting the
electric supply. Check that the earth connection has been
made to the highest of standards under current legislation.
6Electrical installation must only be carried out by a qualified
technician, in accordance with current requirements.
Primary circuit flow
Primary circuit return
Domestic hotwateroutlet
Domestic cold water inlet
Lowtemperaturecircuit flow
Lowtemperaturecircuitreturn
Mediumtemperaturecircuit flow
Mediumtemperaturecircuitreturn
Hightemperaturecircuit flow
Hightemperaturecircuitreturn

SATK20 & SATK30
3
Dimensions - SATK20
Dimensions - SATK30
A B C kg
G¾B G½B G¾B 16
A B C kg
G¾B G½B G¾B 19
550
AABB
65 65
450
CC
59 101 160
65190 195
430
15490
46
10 245
110
265
110
85
AA
B
B
629
65 65
550
CC
159 101 160
65
290 195
530
15
565
49
10 245
110
265
110
85

SATK20 & SATK30
4
Technical Specification - SATK20
Medium: Water
Max. percentage of glycol 30%
Max. temperature: 85˚C
Max. working pressure: Primary circuit: 10 bar
Domestic hot water: 10 bar
Nom. DHW heat exchanger net output: 50 kW
Max. recommended primary circuit flow rate: 1.2 m³/h
DHW circuit max. flow rate: 18 l/m (0.3 l/s)
Min.flow rate to activate domestic flow sensor: 2.7 l/m ±0.3
Max. differential pressure on domestic
water modulating valve: ∆p 0.9 bar
Max. differential pressure on mixing valve: ∆p 0.9 bar
Power supply: 230 V (ac)±10% 50 Hz
Power consumption: 105 W (SATK 20203)
Protection class: IP 40
Pump: UPS 15/60
Pump bypass setting: 0.45 bar
Actuator: stepper 24 V
Probes: NTC 10 kΩ
Safety thermostat: 55˚C ±3
Technical Specification - SATK30
Medium: Water
Max. percentage of glycol 30%
Max. temperature: 85˚C
Max. working pressure: Primary circuit: 16 bar
Secondary circuit: 3 bar
Domestic hot water: 10 bar
Nom. heating exchanger net output: 15 kW
Nom. DHW heat exchanger net output:
SATK30103: 50 kW
SATK30105: 75 kW
Max. recommended primary circuit flow rate: 1.2 m³/h
DHW circuit max. flow rate: 18 l/m (0.3 l/s)
Min.flow rate to activate domestic flow sensor: 2.7 l/m ±0.3
Max. differential pressure on domestic
water modulating valve: ∆p 0.9 bar
Power supply: 230 V (ac)±10% 50 Hz
Power consumption: 105 W
Protection class: IP 40
Pump: UPS 15/60
Pump bypass setting: 0.45 bar
Actuator: stepper 24 V
Probes: NTC 10 kΩ
Safety relief valve setting: 3 bar
Safety thermostat: 55˚C ±3
Expansion vessel: 7.5 litre
Pressure switch: opening 0.4 bar - closing 0.8 bar
Material
Components: brass BS EN 12165 CW617N
Pipes: stainless steel
Frame: RAL 9010 sprayed steel
Protective shell cover: PPE
Exchanger: brazed stainless steel
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
discharge from the safety valve, if it is not connected to a
discharge tundish (SATK30103 and SATK30105), 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.
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:
1connection to the pipework from the centralised boiler
plant
2heating circuit connection
3domestic water circuit connection
4discharge from safety relief valve
Electrical:
1electric supply line 230 V (ac) – 50 Hz
2time clock/thermostat line (potential-free)
3centralised bus line for heat meter data transmission (if
required)
4centralised electric supply line for heat meter (if required)

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

SATK20 & SATK30
6
System start-up
Before switching on the HIU, visually check all oints 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 230V(ac)
DHW Domestic hotwaterON
CH Heating ON
FAULT Fault detected
654 23 1

SATK20 & SATK30
7
User Interface
•Reset key
This allows restoration of normal function after the
safety thermostat has been triggered and
activation/deactivation of the under floor heating
function.
•Setting the temperatures
These allow the specified temperatures for the heating and
domestic water cycles to be set and view the relative
values on the display.
•LED display
Shows the heating and domestic hot water set point
temperatures and the error codes.
•Stand-by:
The following alternate every 5 seconds on the display:
Safety and alarms
Error codes associated with faults are signalled by the
illumination of the FAULT LED shown on the display.
Heating circuit pressure switch fault - Error code: 4
SATK30103 - at LOW/HIGH temperature setting
The SATK30 HIU continuously monitors the pressure in the
apartments secondary heating circuit. If the pressure falls in
this circuit, the pressure switch is activated, the circulation
pump shuts down and the and the regulating valve closes.
Heating cycle activation is indicated by a flashing fault LED on
the electronic controller. This fault does not affect the
generation of the domestic hot water.
CODE SWITCH SETTING SET
654 3 2 1HEATING DHW
SATK20103
LOWtemperature 25 to 45˚C 42 to 60˚C
SATK20203
MEDIUMtemperature 50 to 75˚C 42 to 60˚C
SATK20303
HIGH temperature Max 85˚C 42 to 60˚C
SATK30103 & SATK30105
HIGH temperature setting 50 to 75˚C 42 to 60˚C
Tab le 1 – factory default settings
Factory set (do notchange) Mayb
echangedtoactivateoptionalfunctions
Switch 1: modulatingtemperatureregulationwithcompensated set point
Switch 2-3: change SATK30103 & SATK30105 setting to Low Temperature
Switch 5: domestic water preheating function
OFF
ON
OFF
ON
Domestic water temperature
Heating temperature
• Heating cycle ON:
The setpointtemperature is shown while the
symbol flashes:
The setpointtemperature is shown while the
symbol flashes:
• Domestic water cycle ON:
Heating temperature setpoint
60
60
48
Domestic water temperature setpoint
48
RESET
4

SATK20 & SATK30
8
Compensation probe fault - Error code: 15
SATK20103 - LOW temperature
SATK30103 - at LOW temperature setting
Domestic water probe fault - Error code: 6
Safety thermostat cutout - Error code: 69
SATK20103 - LOW temperature
SATK30103 - at LOW temperature setting
Removing a fault
Once the correct pressure has been achieved on the heating
circuit, the fault can be reset. (see page 7).
Probe fault
If the domestic water temperature probe fails, domestic water
generation will cease immediately. Heating performance will
not be affected.
If the heating probe fails, the heating will cease immediately.
The domestic water generation will not be affected. The probe
fault is indicated by a flashing fault LED on the electronic
controller.
Heating probe fault - Error code: 5
After the user has reset the isolation imposed by the safety
thermostat, the shut-off valve can only be re-enabled when
the mixing/modulating valves are completely closed again.
This means that if a domestic water cycle is in progress, the
activation of the shut-off valve will be postponed until the
end of that domestic water cycle.
Removing a fault
Before resetting the controller, the manual
reset button will need to be pressed.
Safety valve fault - Error code: 76
SATK20103 - LOW temperature
Removing a fault
Normal operating conditions are restored automatically once
the faulty safety valve is working correctly again.
Safety setting incorrect - Error code: 76
Removing a fault
Normal operation will be restored once the probe is replaced.
(see page 15).
Removing a fault
Restore correct switch setting according to Table 1
Automatic controller function
Rese
t mixing/modulating valve to zero
Immediately after the power supply has been switched on,
the position of the mixing/modulating valves is reset to zero.
Pump anti-clog
When the pump is not in use, it is powered on for a period of
5 seconds every 24 hours.
Mixing valve/modulating valve anti-clog
The anti-clogging cycle for the mixing/modulating valve is run
every 24 hours.
The HIU is configured to support low temperature heating
(low temperature models only), constantly monitors the
heating flow temperature and includes a safety thermostat.
If the thermostat is activated during a general cycle, the
circulation pump will immediately stop, the mixing valve and
safety lock valve (SATK20103) will close. Safety thermostat
activation is indicated by a steady, red fault LED on the
electronic controller. This fault locks all functions.
In the event of a power failure, the thermal safety valve
prevents hot water for heating purposes from entering the
system.
15
5
6
76
79
69

SATK20 & SATK30
9
Components - SATK20103 LOW Temperature HIU
Item Component
1 Frame
2 Electronic controller
3 Thermal safety relief valve
4 Heating mixing valve
5 DHW production modulating valve
6 Heat flow temperature probe
7 Thermal safety thermostat
8 DHW temperature probe
9 DHW heat exchanger
10 Drain cock
11 UPS 15-60 pump
12 Protective pump by-pass
13 Flow temp. compensation return probe
14 DHW priority flow meter
15 Heat meter spool piece
16 Air vent cock
17 System strainer/heat meter flow probe pocket
18 Primary circuit isolating valve
Functional characteristics
Heating range: 25 to 45˚C
Set point regulation
DHW production range: 42 to 60˚C
Optional functions
Domestic water cycle: domestic water preheating function
Heating cycle: modulating temperature regulation
with compensated set point
floor slab heating function
Factory settings
Components - SATK20203 MEDIUM Temperature HIU
Item Component
1 Frame
2 Electronic controller
3 Heat mixing valve
4 DHW production modulating valve
5 Heating flow temperature probe
6 DHW temperature probe
7 DHW heat exchanger
8 Drain cock
9 UPS 15-60 pump
10 Protective pump by-pass
11 DHW priority flow meter
12 Heat meter spool piece
13 Air vent cock
14 System strainer/heat meter flow probe pocket
15 Primary circuit isolating valve
Functional characteristics
Heating range: 50 to 75˚C
Set point regulation
DHW production range: 42 to 60˚C
Optional functions
Domestic water cycle: domestic water preheating function
Factory settings
1 2 3 4 5 6 4
ON
10
11
12
13
14
15
1
2
3
4
6
7
5
9
8
1 2 3 4 5 6 4
ON
910
11
12
13
14
15
16
1
2
3
4
6
7
8
5
17
18

SATK20 & SATK30
10
Operating Cycles SATK20 Low and Medium Temperature
Domestic water generation: This cycle always takes priority
over the heating cycle.
When a tap or shower is turned on (detected by the domestic
water flow meter) the DHW cycle is activated, the controller
pilots the modulating valve opening so as to ad ust the
temperature detected by the domestic water probe to the
selected set point value.
When the tap or shower is turned off, the modulating valve is
fully closed.
The active domestic water cycle is signalled by the yellow DHW
LED which comes on.
The domestic water temperature set point can be set using
trimmer P1 and shown on the display.
Heating cycle: Set point regulation
When space heating is requested by the room thermostat, the
circulation pump is powered while the modulating valve is
opened gradually until the set point temperature is reached.
At the end of the heating cycle, the circulation pump comes to
a stop and the modulating valve is closed.
The active heating cycle is signalled by the yellow CH LED
which comes on.
The heating cycle temperature set point can be set using
trimmer P2 and shown on the display.
Under floor heating function: SATK20103 - LOW temperature
This cycle aids the drying of the underfloor heating screed at
low temperatures. This function can only be activated and
executed if there are no faults
It can be activated by pressing and holding the RESET button
for 8 seconds.
The yellow CH LED blinks while the under floor heating drying
function is in operation.
The function has a duration of 240 hours, and is carried out by
simulating a request to run in heating mode starting from a set
point of 25°˚C and rising in regular intervals to a temperature
of 45˚C.
Once the maximum set point has been reached, the function is
executed, following the same procedures, in reverse (from the
maximum set point to the minimum set point).
This function has priority over heating and hot water cycles,
and can be suspended at any time by pressing and holding the
RESET button for 8 seconds.
Optional functions - to activate/deactivate the optional
functions the electric power supply must always be turned off.
Domestic water generation: DHW preheating function
The function is enabled by setting dip switch 5 to the ON
position.
During periods when the domestic water cycle is not used, if
the DHW probe detects a temperature 10°C below the SET
value, the controller partially opens the domestic water
modulating valve for the time required (max. 5 mins) to bring
the temperature detected up to a value 5˚C below the set point
value.
Operating Cycles SATK20
5
ON
48
25
8 seconds
48
P2
P1
60
P2
P1

SATK20 & SATK30
11
Operating Cycles SATK20 Low and Medium Temperature
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 SATK20103 - LOW temperature
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 heating
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 8).
Operating Cycles SATK20
Components - SATK20303 HIGH Temperature HIU
Item Component
1 Frame
2 Electronic controller
3 Heat ON/OFF valve
4 DHW production modulating valve
5 Drain cock
6 DHW temperature probe
7 DHW heat exchanger
8 DHW priority flow meter
9 Heat meter spool piece
10 Air vent cock
11 System strainer/heat meter flow probe pocket
12 Primary circuit isolating valve
Functional characteristics
Max. heating temp.
ON/OFF regulation: 85˚C
Set point regulation
DHW production range: 42 to 60˚C
Optional functions
Domestic water cycle: domestic water preheating function Factory settings
1 2 3 4 5 6 4
ON
10
11
12
1
2
3
4
5
9
8
7
6
1
OFF
60
4

SATK20 & SATK30
12
To modify the factory settings and enable the HIU to support
LOW temperature systems (25 to 45˚C), proceed as follows.
1Switch off the electricity power supply to the HIU
2Set the switches 2 and 3 with the ON-OFF setting
Operating Cycles SATK20 High Temperature
Heating cycle: ON/OFF regulation.
When the room thermostat requests the start of a heating
cycle, the valve is opened completely, allowing water to
circulate at the temperature supplied by the central heating
system (ON-OFF regulation).
The valve is closed on completion of the heating cycle.
The active heating cycle is signalled by the yellow CH LED
which comes on.
No value is shown on the display.
Optional functions - to activate/deactivate the optional
functions the electric power supply must always be turned off.
Domestic water generation
Domestic water pre-heating function
The function is enabled by setting dip switch 5 to the ON
position.
During periods when the domestic water cycle is not used, if
the DHW probe detects a temperature 10˚C below the SET
value, the controller partially opens the domestic water
modulating valve for the time required (max. 5 mins) to bring
the temperature detected up to a value 5˚C below the set point
value.
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.
Safety and alarms
Error codes associated with faults are signalled by the
illumination of the FAULT LED are also shown on the display
(see page 8).
Operating Cycles SATK20
Factory settings SATL30103 & SATK30105
SATK30103 & SATK30105 are factory set to support HIGH
temperature heating (50 to 75˚C), with the following switch
settings.
Factory settings
3 Remove the safety thermostat umper cable and
connect the cables to the thermostat.
4Switch on the electricity power supply to the HIU.
5
ON
48
4
––
1 2 3 4 5 6 4
ON
1 2 3 4 5 6 4
ON

SATK20 & SATK30
13
Components - SATK30103 & SATK30105
Item Component
1 Primary isolation valve
2 Drain cock
3 Heat meter spool piece -
replaced by heat meter when fitted
4 Primary filter and heat meter probe pocket
5 Heating circuit on/off valve
7 Modulating primary control valve (DHW)
8 Plate heat exchanger (DHW)
9 DHW temperature sensor
10 DHW flow switch
11 Electronic control unit
12 Room controller (not supplied)
13 Plate heat exchanger (space heating)
14 Heating flow temperature sensor
15 Temperature control stat
16 Strainer (heating circuit)
17 Pump safety bypass and DP switch
18 Pump
19 Expansion vessel
20 Safety relief valve - 3 bar
21 Heating return temperature sensor
22 Pressure gauge
23 Filling loop isolation valve*
24 Filling loop double check valve*
25 Filling loop*
*Not shown on Components illustration
Functional characteristics - SATK30103
Heating range:
- LOW temperature setting 25 to 45˚C
- MEDIUM/HIGH temperature setting 50 to 75˚C
Set point regulation
DHW production range: 42 to 60˚C
Heat exchanger capacity
SATK30103 up to 50 kW
SATK30105 up to 75 kW
Optional functions
Domestic water cycle: domestic water preheating function
Heating cycle at LOW temperature setting:
modulating temperature regulation
with compensated set point
under floor heating screed drying
cycle
Components - SATK30103
Components - SATK30103
ON DHW CH FAULT
RESET
1
19
11
5
13
7
15 21
20
18
10
17
16
3
4
2
14
822 2
ON DHW CH FAULT
RESET
1
2
1
19
11
5
13
7
15
9
21
20
18
10
17
16
3
4
2
14
8
2
1
0
3
4
bar
22
2 2

SATK20 & SATK30
14
Operating Cycles SATK30
Domestic water generation: This cycle always takes priority
over the heating cycle.
When a tap or shower is turned on (detected by the domestic
water flow meter) the DHW cycle is activated, the controller
pilots the modulating valve opening so as to ad ust the
temperature detected by the domestic water probe to the
selected set point value.
When the tap or shower is turned off, the modulating valve is
fully closed.
The active domestic water cycle is signalled by the yellow DHW
LED which comes on.
The general domestic water cycle temperature set point can be
set using trimmer P1 and shown on the display.
Heating cycle: Set point regulation
When space heating is requested by the room thermostat, the
circulation pump is powered while the modulating valve is
opened gradually until the set point temperature is reached.
At the end of the heating cycle, the circulation pump comes to
a stop and the modulating valve is closed.
The active heating cycle is signalled by the yellow CH LED
which comes on.
The heating cycle temperature set point can be set using
trimmer P2 and shown on the display.
Under floor heating function: LOW temperature setting
This cycle aids the drying of the underfloor heating screed at
low temperatures. This function can only be activated and
executed if there are no faults.
It can be activated by pressing and holding the RESET button
for 8 seconds.
The yellow CH LED blinks while the funder floor heating drying
function is in operation.
The function has a duration of 240 hours, and is carried out by
simulating a request to run in heating mode starting from a set
point of 25°˚C and rising in regular intervals to a temperature
of 45˚C.
Once the maximum set point has been reached, the function is
executed, following the same procedures, in reverse (from the
maximum set point to the minimum set point).
This function has priority over heating and hot water cycles,
and can be suspended at any time by pressing and holding the
RESET button for 8 seconds.
Optional functions - to activate/deactivate the optional
functions the electric power supply must always be turned off.
Domestic water generation: DHW preheating function
The function is enabled by setting dip switch 5 to the ON
position.
During periods when the domestic water cycle is not used, if
the DHW probe detects a temperature 10°C below the SET
value, the controller partially opens the domestic water
modulating valve for the time required (max. 5 mins) to bring
the temperature detected up to a value 5˚C below the set point
value.
Operating Cycles SATK30
48
P2
P1
60
P2
P1
25
8 seconds
5
ON
48

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

SATK20 & SATK30
16
Replacing the valve obturator
•Disconnect the valve actuator (see previous paragraph).
•Extract the obturator, unscrewing the locking nut (F).
•Replace the obturator and screw on the locking nut (F),
then insert the actuator.
•Insert the fixing clip, respecting the correct direction
•Reconnect the connector.
Replacing the valve actuator
•Disconnect the actuator cable, lightly pressing the tab on
the connector and extracting it (see page 17).
•Extract the fixing clip (D) and then the actuator.
•Position the new actuator (E).
•Insert the fixing clip, respecting the correct direction.
•Reconnect the connector.
Maintenance
Temperature probe replacement
•Disconnect the probe cable, lightly folding the tab (C) and
extracting the connector (see page 17)
•Unscrew the probe
•Fit the new probe
•Reconnect the connector respecting the only possible way
it can be inserted.
When carrying out maintenance on the electrical system, for
the connections follow the diagram on page 16.
After concluding maintenance, refill the system and check the
operations described in the chapter “Commissioning” and
re-fit the cover.
For information regarding spare parts or other technical
information, please contact Altecnic.
Only genuine Altecnic re-placement components should be
used.
Replacing or cleaning the DHW priority flow meter turbine
Extract the flow sensor
•Unscrew and remove the cartridge (H)
•Remove any impurities present or change the cartridge if
necessary
•Screw in the cartridge
•Reposition the flow sensor.
Replacing the DHW priority flow meter
•Disconnect the flow meter cable by means of the
connector (see page 17).
•Extract the flow sensor (G).
•Position the new sensor.
•Reconnect the connector respecting the only possible way
it can be inserted.
C
G
F
D
E
H

SATK20 & SATK30
17
Electrical Wiring
FUSE 5x20
12 3 4
5a
6
7 8
5
9
10
13
11
12
Room thermostat
Electric supply:
6 5 4 3 2 1
SATK20103 SATK20203 SATK20303 SATK30103
DHW temperature probe
DHW priority flowmeter xxxx
Flow temp. compensationreturn probe xx x
DHWproduction valve actuator xxxx
Thermal safetyrelief valve x
x
Thermal safety thermostat xx
Heating flow temperature probe xxxx
xxxx
xxxx
xx x
Electric supply 230 V (ac)* xxxx
xxxx
xxxx
* Wiringtobemade during installation
Pressure switch
Heating valve actuator
Earth
Pump
Room thermostat*
Fuse
3
4
5
5a
1
2
6
7
8
9
10
11
12
13
SATK30105
xxxxx
x
x
x
x
x
x
x
x
x
x
x
x
Voltage free, prepayment lead for connection
to prepayment system

SATK20 & SATK30
18
Fault Finding
Fault Indications Possible Cause of Fault Operations to be Performed
The water is n t
heating
DHW LED on
primary circuit isolating valve closed open the isolating valve
modulating valve actuator connector disconnected re-connect actuator connector
modulating valve actuator disconnected from valve body re-connect actuator
modulating valve actuator faulty call qualified personnel to have it replaced
DHW temperature probe cable inverted with heating probe restore correct connection
presence of air in the system restore correct connection
electronic controller not working call qualified personnel to have it replaced
valve obturator blocked in closed position call qualified personnel to have it replaced
centralised system not working contact person in charge of system
FAULT led lit + error
code 6 active
DHW temperature probe disconnected re-connect probe
DHW temperature probe faulty call qualified personnel to have it replaced
FAULT led lit + error
code 79 active DHW temperature probe faulty restore correct switch setting
DHW Led off DHW priority flow meter disconnected re-connect flow meter
DHW priority flow meter faulty call qualified personnel to have it replaced
all LEDs are off electricity power supply switched off switch on electricity supply
protection fuse burnt out call qualified personnel to have it replaced
The water is h t but
d es n t reach the
desired temperature
DHW led on
domestic water cycle temperature set point too low increase set point
HIU strainer clogged call qualified personnel to have it serviced
exchanger partly clogged call qualified personnel to have it serviced
modulating valve actuator faulty call qualified personnel to have it replaced
valve obturator blocked in intermediate position call qualified personnel to have it replaced
modulating valve actuator connector disconnected re-connect actuator connector
DHW temperature probe cable inverted with heating probe restore correct connection
excessive demand for DHW decrease demand
electronic controller not working call qualified personnel to have it replaced
centralised system temperature insufficient contact person in charge of system
primary circuit flow rate insufficient contact person in charge of system
The h t water
temperature reached
is t high
DHW led on
domestic water cycle temperature set point too high decrease set point
DHW temperature probe cable inverted with heating probe restore correct connection
modulating valve actuator faulty call qualified personnel to have it replaced
valve obturator blocked in intermediate or open position call qualified personnel to have it replaced
electronic controller not working call qualified personnel to have it replaced
H t water fl w rate
is insufficient DHW led on
HIU strainer clogged call qualified personnel to have it replaced
possible domestic water system shut-off valves
partly open open the valves
centralised domestic circuit cold water flow rate insufficient call qualified personnel to have it serviced
The is n h t water
fl w DHW led off
possible domestic water system shut-off valves closed open the valves
no cold water in centralised domestic circuit call qualified personnel to have it serviced
HIU strainer completely clogged call qualified personnel to have it serviced
heat exchanger completely blocked call qualified personnel to have it serviced

SATK20 & SATK30
Altecnic Ltd Mustang Drive, Stafford, Staffordshire ST16 1GW
T: [phone] E: [email protected]
Registered in England No: 2095101
altecnic.c .uk
IOM 028 18-11-14
E & O.E
Fault Indications Possible Cause of Fault Operations to be Performed
The r m is n t
reaching the desired
temperature
CH led on
heating cycle temperature set point too low increase set point
chrono-thermostat temperature setting incorrect check programming of chrono-thermostat
HIU strainer clogged call qualified personnel to have it serviced
heating valve actuator faulty call qualified personnel to have it replaced
heating valve obturator blocked call qualified personnel to have it replaced
modulating valve actuator connector disconnected restore correct connection
DHW temperature probe cable inverted with heating probe restore correct connection
presence of air in the system vent the system
pump (if present) not working call qualified personnel to have it replaced
pump cable (if present) not connected restore connection
possible system shut-off valves/terminals closed open the valves
centralised system temperature insufficient contact person in charge of system
electronic controller not working call qualified personnel to have it replaced
primary circuit flow rate insufficient contact person in charge of system
centralised system not working contact person in charge of system
CH led off timer/thermostat time setting incorrect check programming of timer/thermostat
timer/thermostat not working check timer/thermostat
all leds are off electric supply switched off restore HIU electric supply
protection fuse burnt out restore HIU electric supply
FAULT led lit + error
code 4 active heating circuit pressure too low restore system pressure
FAULT led lit + error
code 5 active heating temperature probe faulty call qualified personnel to have it replaced
FAULT led lit + error
code 15 active compensation temperature probe faulty call qualified personnel to have it replaced
FAULT led lit + error
code 69 active safety thermostat cut in call qualified personnel to have it serviced
FAULT led lit + error
code 76 active safety relief valve faulty call qualified personnel to have it serviced
FAULT led lit + error
code 79 active incorrect switch setting restore correct switch settings
Fault Finding