SATK20 & SATK30
heat interface unit
Installation Operation & Maintenance Instructions
SATK20 & SATK30
Content
SATK20
Function and product range
Safety instructions
Dimensions and technical specification
Installation
First operation
Electronic controller
Safety and alarms
SATK20103 and SATK20203 components
SATK20303 components
SATK30103 components
SATK30105 components
Maintenance
Electric connections
Trouble shooting and solution
1
1
3
4
5
6
7
8
10
12
12
14
16
27
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.
SATK30
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
WARNING These instructions must be read and understood
before installing and maintaining the HIU.
CAUTION! FAILURE TO FOLLOW THESE
INSTRUCTIONS COULD RESULT IN A SAFETY
HAZARD!
1 The device must be installed, commissioned and
maintained by qualified technical personnel in accordance
with national regulations and/or relevant local
requirements.
2 If 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.
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.
3 Flush 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.
NOTE: Due to the specification ordered, or the country of
destination, the actual unit may differ from those shown.
4 Make sure that all connection fittings are watertight.
5 When 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 injury.
1
SATK20 & SATK30
Safety Instructions
Key to Symbols
6 Water 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.
Primary circuit flow
7 In 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.
Primary circuit return
Domestic hot water outlet
8 Any use of the HIU other than it’s intended use is prohibited.
9 Any coupling of the device with other system components
must be made while taking the operational characteristics of
both units into consideration.
Domestic cold water inlet
10An incorrect coupling could compromise the operation of
the device and/or system.
Low temperature circuit flow
NOTE: Risk of electric shock. Live parts. Shut off the electric
supply before opening the HIU cover.
Low temperature circuit return
1 During installation and maintenance operations, always
avoid direct contact with live or potentially hazardous parts.
2 The device must not be exposed to water drops or humidity,
direct sunlight, the elements, heat sources or high intensity
electromagnetic fields.
Medium temperature circuit flow
This device cannot be used in areas at risk of explosion or
fire.
Medium temperature circuit return
3 The 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.
High temperature circuit flow
4 Use suitable automatic protection devices in compliance
with current legislation.
High temperature circuit return
5 The 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.
General Information
• Please leave the manual as a reference guide for the user.
6 Electrical installation must only be carried out by a qualified
technician, in accordance with current requirements.
• 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.
2
SATK20 & SATK30
Dimensions - SATK20
Dimensions - SATK30
C
C
C
Depth inc.
cover 265
Depth inc.
cover 265
D
F
F
D
C
A
B
B
D
A
A
D
B
B
D
E
A
D
E
A
B
C
D
E
F
kg
A
B
C
D
E
F
kg
G¾B
G½B
G¾B
65
450
550
16
G¾B
G½B
G¾B
65
550
630
19
Technical Specification
Technical Specification
Medium:
Max. percentage of glycol
Max. temperature:
Max. working pressure: Primary circuit:
Domestic hot water:
Nom. DHW heat exchanger net output:
Max. recommended primary circuit flow rate:
DHW circuit max. flow rate:
Min.flow rate to activate domestic flow sensor:
Max. differential pressure on domestic
water modulating valve:
Max. differential pressure on mixing valve:
Power supply:
Power consumption:
Protection class:
Pump:
Pump bypass setting:
Actuator:
Probes:
Safety thermostat:
Medium:
Max. percentage of glycol
Max. temperature:
Max. working pressure: Primary circuit:
Secondary circuit:
Domestic hot water:
Nom. heating exchanger net output:
Nom. DHW heat exchanger net output:
Max. recommended primary circuit flow rate:
DHW circuit max. flow rate:
Min.flow rate to activate domestic flow sensor:
Max. differential pressure on domestic
water modulating valve:
Water
30%
85˚C
10 bar
10 bar
50 kW
1.2 m³/h
18 l/m (0.3 l/s)
2.7 l/m ±0.3
∆p 1.65 bar
∆p 1.65 bar
230 V (ac)±10% 50 Hz
105 W (SATK 20203)
IP 40
UPS 15/60
0.45 bar
stepper 24 V
NTC 10 kΩ
55˚C ±3
Power supply:
Power consumption:
Protection class:
Pump:
Pump bypass setting:
Actuator:
Probes:
Safety relief valve setting:
Safety thermostat:
Expansion vessel:
Pressure switch:
Material
Components:
Pipes:
Frame:
Protective shell cover:
Exchanger:
brass BS EN 12165 CW617N
stainless steel
RAL 9010 sprayed steel
PPE
brazed stainless steel
3
Water
30%
85˚C
16 bar
3 bar
10 bar
15 kW
50 kW
1.2 m³/h
18 l/m (0.3 l/s)
2.7 l/m ±0.3
∆p 1.65 bar
230 V (ac)±10% 50 Hz
105 W
IP 40
UPS 15/60
0.45 bar
stepper 24 V
NTC 10 kΩ
3 bar
55˚C ±3
7.5 litre
opening 0.4 bar - closing 0.8 bar
SATK20 & SATK30
Installation
Isolation Valves
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.
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.
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), 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.
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.
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.
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.
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.
Connection to the main supply
The device is supplied with an electric supply cable - plug not
supplied.
Check the measurements again before installing pipework and
electrical cables.
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.
Hydraulic connections:
1 connection to the pipework from the centralised boiler plant
2 heating circuit connection
3 domestic water circuit connection
4 discharge from safety relief valve
This line must be connected to a circuit breaker device.
Electrical supply:
230 V(ac) ±10% - 50 Hz
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)
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 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.
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.
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.
Room thermostat
4
SATK20 & SATK30
Fitting the cover
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.
2
1
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.
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.
A
B
NOTE: For UK markets, a filling loop is supplied in lieu of the
back-flow preventer.
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).
B
A
Place the lower part of the casing over the frame.
Tighten the screws (3).
Automatic controller function
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.
5
SATK20 & SATK30
• Reset key
Electronic Controller
This allows restoration of normal function after
the safety thermostat has been triggered and
activation/deactivation of the under floor
heating function.
RESET
• 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.
6 5 4 3 2 1
Heating temperature
Domestic water temperature
Operating Principle
• LED display
All heating and domestic hot water functions offered by
SATK20 and SATK30 HIUs are controlled by a digital controller.
Shows the heating and domestic hot water set point
temperatures and the error codes.
The controller is factory set with different parameters and
settings depending on the model (Table 1).
• Stand-by:
The following alternate every 5 seconds on the display:
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.
Heating temperature set point
60
User Interface
The user interface, built into the PCB, consists of the following
devices.
48
Domestic water temperature set point
• Indicator LED
The various functions and faults are signalled by either
flashing or permanent illumination of the LEDs.
ON
DHW
CH
FAULT
• Heating cycle ON:
60
Electric supply 230 V (ac)
Domestic hot water ON
Heating ON
Fault detected
The set point temperature is shown while the
symbol flashes:
• Domestic water cycle ON:
48
The set point temperature is shown while the
symbol flashes:
Table 1 – factory default settings
SWITCH SETTING
CODE
6
5
4
3
ON
1
HEATING
DHW
SATK20103
LOW temperature
25 to 45˚C
42 to 60˚C
SATK20203
MEDIUM temperature
50 to 75˚C
42 to 60˚C
SATK20303
HIGH temperature
Max 85˚C
42 to 60˚C
50 to 75˚C
42 to 60˚C
SATK30103 & SATK30105
HIGH temperature setting
OFF
SET
2
Factory set (do not change)
OFF
ON
May be changed to activate optional functions
Switch 1: modulating temperature regulation with compensated set point
Switch 2-3: change SATK30103 & SATK30105 setting to Low Temperature
Switch 5: domestic water preheating function
6
SATK20 & SATK30
Safety thermostat cutout - Error code: 69
SATK20103 - LOW temperature
SATK30103 - at LOW temperature setting
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
69
SATK30103 - at LOW/HIGH temperature setting
4
The HIU is configured to support low temperature heating
(low temperature models only), constantly monitors the
heating flow temperature and includes a safety thermostat.
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.
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.
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.
In the event of a power failure, the thermal safety valve
prevents hot water for heating purposes from entering the
system.
Removing a fault
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.
Once the correct pressure has been achieved on the heating
circuit, the fault can be reset. (see page 5).
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.
Probe fault
If the domestic water temperature probe fails, domestic water
generation will cease immediately. Heating performance will
not be affected.
Removing a fault
Before resetting the controller, the manual
reset button will need to be pressed.
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.
Safety valve fault - Error code: 76
SATK20103 - LOW temperature
Heating probe fault - Error code: 5
76
5
Removing a fault
Normal operating conditions are restored automatically once
the faulty safety valve is working correctly again.
Domestic water probe fault - Error code: 6
Safety setting incorrect - Error code: 76
6
79
Compensation probe fault - Error code: 15
SATK20103 - LOW temperature
SATK30103 - at LOW temperature setting
Prepayment meter setting incorrect - Error code: 80
80
15
Removing a fault
Removing fault 79 and 80
Normal operation will be restored once the probe is replaced.
(see page 15).
Restore correct switch setting according to Table 1
Automatic controller function
Reset 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.
7
SATK20 & SATK30
Components - SATK20103 LOW Temperature HIU
Item Component
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Frame
Electronic controller
Thermal safety relief valve
Heating mixing valve
DHW production modulating valve
Heat flow temperature probe
Thermal safety thermostat
DHW temperature probe
DHW heat exchanger
Drain cock
UPS 15-60 pump
Protective pump by-pass
Flow temp. compensation return probe
DHW priority flow meter
Heat meter spool piece
Air vent cock
System strainer/heat meter flow probe pocket
Primary circuit isolating valve
18
2
17
3
16
4
15
5
14
6
13
12
7
11
8
10
9
Functional characteristics
Heating range:
1
25 to 45˚C
Factory settings
Set point regulation
6
DHW production range: 42 to 60˚C
5
4
3
2
1
Optional functions
Domestic water cycle:
Heating cycle:
ON
domestic water preheating function
modulating temperature regulation
with compensated set point
floor slab heating function
15
Components - SATK20203 MEDIUM Temperature HIU
Item Component
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Frame
Electronic controller
Heat mixing valve
DHW production modulating valve
Heating flow temperature probe
DHW temperature probe
DHW heat exchanger
Drain cock
UPS 15-60 pump
Protective pump by-pass
DHW priority flow meter
Heat meter spool piece
Air vent cock
System strainer/heat meter flow probe pocket
Primary circuit isolating valve
1
14
2
13
3
12
11
4
5
10
6
9
7
8
Functional characteristics
Heating range:
50 to 75˚C
Factory settings
Set point regulation
6
DHW production range: 42 to 60˚C
Optional functions
Domestic water cycle:
5
4
3
2
1
ON
domestic water preheating function
8
SATK20 & SATK30
Operating Cycles SATK20
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 adjust 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.
P2
48
P1
60
P2
P1
25
8 seconds
5
ON
9
48
SATK20 & SATK30
Operating Cycles SATK20
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 7).
1
OFF
60
4
Components - SATK20303 HIGH Temperature HIU
Item Component
1
2
3
4
5
6
7
8
9
10
11
12
Frame
Electronic controller
Heat ON/OFF valve
DHW production modulating valve
Drain cock
DHW temperature probe
DHW heat exchanger
DHW priority flow meter
Heat meter spool piece
Air vent cock
System strainer/heat meter flow probe pocket
Primary circuit isolating valve
12
1
11
2
10
3
9
4
8
Functional characteristics
Max. heating temp.
ON/OFF regulation:
7
85˚C
Set point regulation
5
6
DHW production range: 42 to 60˚C
Optional functions
Domestic water cycle:
domestic water preheating function
Factory settings
6
5
4
3
2
1
ON
10
SATK20 & SATK30
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 7).
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 jumper cable and
connect the cables to the thermostat.
4 Switch on the electricity power supply to the HIU.
6
5
4
3
2
––
5
ON
4
1
ON
To modify the factory settings and enable the HIU to support
LOW temperature systems (25 to 45˚C), proceed as follows.
1 Switch off the electricity power supply to the HIU
2 Set the switches 2 and 3 with the ON-OFF setting
6
5
4
3
2
48
1
ON
11
SATK20 & SATK30
Components - SATK30103
Components - SATK30
Item Component
1Primary 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
1
2
4
3
19
2
11
1
5
ON DHW CH FAULT
RESET
13
14
16
17
7
10
15
22
18
2
bar
1
0
3
4
20
21
2
Functional characteristics - SATK30103
98
2
Components - SATK30103
Heating range:
- LOW temperature setting 25 to 45˚C
- MEDIUM/HIGH temperature setting 50 to 75˚C
1
Set point regulation
DHW production range: 42 to 60˚C
2
4
Heat exchanger capacity
3
SATK30103
up to 50 kW
SATK30105
up to 75 kW
19
11
Optional functions
5
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
13
ON DHW CH FAULT
RESET
16
14
17
10
21
18
7
15
20
22
12
8
2
SATK20 & SATK30
Operating Cycles SATK30
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 adjust 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.
P2
48
P1
60
P2
P1
25
8 seconds
5
ON
13
48
SATK20 & SATK30
Operating Cycles SATK30
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).
1
OFF
4
Maintenance
Maintenance
All maintenance procedures should be carried out by an
authorised technician.
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.
Regular maintenance guarantees better efficiency and helps to
save energy.
Before carrying out any maintenance, repair or part
replacement work, proceed as follows:
•
•
•
•
To clean these strainers, carry out the following maintenance
procedure:
Switch off the electric supply
Remove the cover
Close the shut-off valves
Empty the HIU using the drain cocks provided.
• 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.
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.
A
60
B
A
14
SATK20 & SATK30
Maintenance
Replacing the DHW priority flow meter
Temperature probe replacement
• Disconnect the flow meter cable by means of the
connector (see page 16).
• Extract the flow sensor (G).
• Position the new sensor.
• Reconnect the connector respecting the only possible way
it can be inserted.
• Disconnect the probe cable, lightly folding the tab (C) and
extracting the connector (see page 16)
• Unscrew the probe
• Fit the new probe
• Reconnect the connector respecting the only possible way
it can be inserted.
G
C
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 valve actuator
• Disconnect the actuator cable, lightly pressing the tab on
the connector and extracting it (see page 16).
• 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.
H
D
E
When carrying out maintenance on the electrical system, for
the connections follow the diagram on page 15.
Replacing the valve obturator
After concluding maintenance, refill the system and check the
operations described in the chapter “Commissioning” and
re-fit the cover.
• 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.
For information regarding spare parts or other technical
information, please contact Altecnic.
Only genuine Altecnic re-placement components should be
used.
F
15
SATK20 & SATK30
Electrical Wiring
5a
2
3
6
4
7
8
DHW priority flow meter
3
Flow temp. compensation return probe
4
DHW production valve actuator
5
Thermal safety relief valve
5a
Pressure switch
6
Thermal safety thermostat
7
Heating flow temperature probe
8
Heating valve actuator
Earth
9
13
Pump
10
FUSE 5x20
11
Electric supply 230 V (ac)*
12
Room thermostat*
13
Fuse
SATK30105
2
SATK30103
DHW temperature probe
SATK20203
6 5 4 3 2 1
1
SATK20303
5
SATK20103
1
x
x
x
x
x
x x x
x x x
x
x
x x x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
* Wiring to be made during installation
12
Room thermostat
11
Electric supply:
9
10
Voltage free, prepayment lead for connection
to prepayment system
16
SATK20 & SATK30
Electrical Wiring with Prepayment Meter
Typical Electrical Connections
230V ac feed
from 6A breaker
E
N
L
Mains
isolation
switch
F
l
o
w
Heat Meter
0000555 kW
Flow
temperature
sensor
S
e
n
s
o
r
Red
Black
MBUS+
MBUS-
Return
temperature
sensor
L
N
230V
E
NC
C
No credit/credit
output
M-Bus output
Residents Interface - Prepayment
230V or voltage free, depending
upon prepayment unit
80
6 5 4 3 2 1
789835 kit required if the
prepayment unit has a 230V
credit/no credit switched supply
Not intended as a site specific drawing
Altecnic HIU SATK
17
SATK20 & SATK30
Fault Finding
Fault
Indications
DHW LED on
The water is not
heating
FAULT led lit + error
code 6 active
FAULT led lit + error
code 79 active
DHW Led off
all LEDs are off
The water is hot but
does not reach the
desired temperature
The hot water
temperature reached
is too high
Hot water flow rate
is insufficient
The is no hot water
flow
DHW led on
DHW led on
DHW led on
DHW led off
Possible Cause of Fault
Operations to be Performed
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
DHW temperature probe disconnected
re-connect probe
DHW temperature probe faulty
call qualified personnel to have it replaced
DHW temperature probe faulty
restore correct switch setting
DHW priority flow meter disconnected
re-connect flow meter
DHW priority flow meter faulty
call qualified personnel to have it replaced
electricity power supply switched off
switch on electricity supply
protection fuse burnt out
call qualified personnel to have it replaced
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
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
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
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
18
SATK20 & SATK30
Fault Finding
Fault
Indications
CH led on
Possible Cause of Fault
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
timer/thermostat time setting incorrect
check programming of timer/thermostat
timer/thermostat not working
check timer/thermostat
electric supply switched off
restore HIU electric supply
protection fuse burnt out
restore HIU electric supply
heating circuit pressure too low
restore system pressure
heating temperature probe faulty
call qualified personnel to have it replaced
compensation temperature probe faulty
call qualified personnel to have it replaced
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
The room is not
reaching the desired
temperature
CH led off
all leds are off
FAULT led lit + error
code 4 active
FAULT led lit + error
code 5 active
FAULT led lit + error
code 15 active
FAULT led lit + error
code 69 active
E & O.E
Altecnic Ltd Mustang Drive, Stafford, Staffordshire ST16 1GW
T: +44 (0)1785 218200 E: sales@altecnic.co.uk
Registered in England No: 2095101
altecnic.co.uk
IOM 028 21-11-14
Operations to be Performed