Sentiotec home.com4 User manual

Version 08/22 ID no. XM125A
INSTRUCTIONS FOR INSTALLATION AND USE
English
EN
DE
FR
IT
SV
FI
Sauna controller
home.com4
With RS485 interface
home.com4 BLACK RS485 1-052-984 / HC4-B-RS485
home.com4 WHITE RS485 1-052-985 / HC4-W-RS485
home.com4

Table of Contents
1. About this instruction manual 5
2. Important information for your safety 6
2.1. Intended use 6
2.2. Safety information for the installer 7
2.3. Safety information for the user 8
3. Product description 9
3.1. Scope of delivery 9
3.2. Optional accessories 9
3.3. Product features 9
3.4. Sauna operating modes 11
3.5. Sensor operating modes 11
4. Installation 13
4.1. Installing the control unit 13
4.2. Cable glands 16
4.3. Installing the heater sensor F1 with overheat cut-out 17
4.4. Installing the bench sensor F2 (optional) 18
4.5. Installing the humidity/temperature sensor FTS2 (optional) 18
4.6. Installing the foil sensor (optional) 18
5. Electrical connection 19
5.1. Power supply cable, heater and vaporizer 21
5.2. Cabin light 21
5.3. Fan 21
5.4. F1 heater sensor 22
5.5. Bench sensor F2 (optional) 22
5.6. Humidity/temperature sensor FTS2 (optional) 22
5.7. Safetyshut-o󰀨 23
5.8. Auxiliary output 23

EN
5.9. Foil sensor (optional) 23
5.10. Power booster (optional) 24
5.11. Remote start (optional) 24
5.12. Speaker output (optional) 24
5.13. DMX output (optional) 25
5.14. BUS connection (RS485 interface) 26
5.15. Finishing the installation 26
6. Testing 27
7. Connection diagram 28
7.1. Connection diagram basic module 230 V / 400 V 28
7.2. Connection diagram for basic module low voltage 29
7.3. Connection diagram for expansion module 230 V 30
7.4. Connection diagram for expansion module low voltage 31
8. Controls 32
9. Commissioning 33
9.1. Technician menu 33
10. Operation 36
10.1. Switching on the light (cleaning lights) 36
10.2. Switching on the control unit 36
10.3. Sauna mode 37
10.4. Combi-mode 38
10.5. Post-drying program 39
10.6. Cabin light 39
10.7. Fan 40
10.8. Preset time 40

10.9. Operating time 41
10.10. ECO mode 42
10.11. Weekly timer 43
10.12. Child safety control 44
10.13. AllO󰀨 45
10.14. User programs 45
10.15. Additional output 47
10.16. Activating standby for remote operation 48
10.17. Coloured light 49
10.18. Music 50
10.19. BUS connection (RS485 interface) 52
11. Bluetooth app 53
11.1. Secure pairing Bluetooth 53
12. Cleaning and maintenance 54
12.1. Cleaning 54
12.2. Maintenance 54
13. Disposal 54
14. Troubleshooting 55
14.1. Error messages 55
14.2. Low-water display 55
14.4. Battery 58
14.3. Fuses 58
15. Technical data 59

EN
Instructions for installation and use p. 5/60
1. About this instruction manual
Read these installation and operating instructions carefully and keep them within
reach of the sauna controller. This ensures that you can refer to information on
safety and operation at any time.
Symbols used for warning notices
In these instructions for installation and use, a warning notice located next to
an activity indicates that this activity poses a risk. Always observe the warning
notices. This prevents damage to property and injuries, which in the worst case
may be fatal.
The warning notices contain keywords, which have the following meanings:
DANGER!
Serious or fatal injury will occur if this warning notice is not observed.
WARNING!
Serious or fatal injury can occur if this warning notice is not observed.
CAUTION!
Minor injuries can occur if this warning notice is not observed.
ATTENTION!
This keyword is a warning that damage to property can occur.
Other symbols
This symbol indicates tips and useful information.
These installation and operating instructions can also be found in
the downloads section of our website: www.sentiotec.com/downloads.

Instructions for installation and use p. 6/60
2. Important information for your safety
The sauna control units of the home.com4 series have been pro-
duced in accordance with the applicable safety rules and regula-
tions. However, hazards may arise during use. Therefore adhere
tothefollowingsafetyinformationandthespecicwarningnotices
in the individual chapters. Also observe the safety information for
the devices connected.
2.1. Intended use
The sauna control units of the home.com4 series are used exclusive-
ly for operating and controlling the sauna functions in accordance
with the technical data.
The sauna control units of the home.com4 series may only be used
foroperatingandcontrollingasaunaheaterwhichhasbeencertied
as satisfying the combustion test described in paragraph 19.101 of
EN 60335-2-53. If the heater does not meet this requirement, an
appropriate safety precaution must be taken (for example: Safety
shut-o󰀨,see5.7 on page 23).
The sauna control units of the home.com4 series may only be used
for operating and controlling three heating circuits with a maximum
heating capacity of 3.5 kW per heating circuit. The maximum evaporator
output totals 3.5 kW. The maximum additional output totals 3.5 kW.
Any use exceeding this scope is considered improper use. Improper
use can result in damage to the product, severe injuries or death.

EN
Instructions for installation and use p. 7/60
2.2. Safety information for the installer
●Installationmayonlybeperformedbyaqualiedelectricianor
similarlyqualiedperson.
●Work on the sauna controller may only be performed when the
power has been disconnected.
●A fully disconnecting all-pole isolating device compliant with
overvoltagecategoryIIImustbettedonsite.
●The sauna control unit must be installed outside the sauna room
at a height of approx. 1.70 m or in accordance with the rec-
ommendation issued by the sauna manufacturer. The ambient
temperature must be within a range spanning -10 °C to +40 °C.
●The heater sensor must be installed in such a way that it is not
a󰀨ectedbyinowingair.
●The heater supply cable must have a minimum cross-sectional
area of 2.5 mm2and be temperature-resistant up to 150 °C.
●Also comply with the regulations applicable at the installation
location.
●For your own safety, consult your supplier in the event of prob-
lemsthatarenotexplainedinsu󰀩cientdetailintheinstallation
instructions.

Instructions for installation and use p. 8/60
2.3. Safety information for the user
●The sauna controller must not be used by children under 8 years
of age.
●The sauna controller may be used by children over 8 years of
age, by persons with limited psychological, sensory or mental
capabilities or by persons with lack of experience/knowledge,
but only if:
– They are supervised.
– They have been shown how to use the device safely and
are aware of the hazards that could occur.
●Children must not play with the sauna controller.
●Children under 14 years of age may only clean the sauna con-
troller if they are supervised.
● Forhealthreasons,donotusethesaunawhenundertheinu-
ence of alcohol, medication or drugs.
● Makesurethatnoammableobjectshavebeenplacedonthe
sauna heater before the sauna controller is switched on.
● Makesurethatnoammableobjectshavebeenplacedonthe
sauna heater before activating the preset time function or the
standby mode for remote start.
●Makesurethatnoammableobjectshavebeenplacedonor
in front of the infrared heater before the sauna control unit is
switched on.
●Makesurethatnoammableobjectshavebeenplacedonor
in front of the infrared heater before activating the preset time
function or the stand-by mode for the remote start.
●For your own safety, consult your supplier in the event of problems
thatarenotdescribedinsu󰀩cientdetailintheuserinstructions.

EN
Instructions for installation and use p. 9/60
3. Product description
3.1. Scope of delivery
●Sauna control unit home.com4
●Heater sensor with integrated overheat cut-out
●Sensor cables
●Installation material
– 4 x chipboard screw 3 x 25 mm raised countersunk head
3.2. Optional accessories
●Bench sensor (1-009-231/O-F2), sensor cables 1.5 m
●Humidity/temperature sensor (1-010-081/O-FTS2), sensor cables 6 m
●Foil sensor (1-014-445/P-ISX-FF), sensor cables 3 m
●Power booster (1-008-779 / O-S2-18, 1-009-280 / O-S2-30)
●Safety shutdown (SFE-xxxxx)
3.3. Product features
The sauna control unit home.com4 features the following functions:
●Regulation of combi-model sauna heaters with a heating output of up to 10.5 kW
and vaporizer output of up to 3.5 kW in the temperature range spanning 30 °C
to 110 °C and a humidity range spanning 0% to 100%.
●A power booster allows the maximum switching capacity to be increased from
10.5 kW to 18 kW or 30 kW.
●Switching a cabin light (up to 100 W)
●Fan regulation (up to 100 W)
●Preset time function (up to 6 hours)
●User programs
The user programs enable favourite sauna settings to be saved and accessed
again.Thereare5presetuserprogramsavailablewhichcanbemodied
according to user requirements.
●Automatic heating time limit
The maximum heating period can be set to 6 h, 12 h, 18 h or 24 h.

Instructions for installation and use p. 10/60
●Overheat cut-out
The overheat cut-out is installed in the housing for the heater sensor. If a de-
fect causes the sauna heater to continue heating after reaching the preferred
temperature,theoverheatcut-outswitchesthesaunaheatero󰀨atatemper-
ature of around 139 °C.
●Real-time clock with weekly timer
●Post-drying program
After operation in combined mode, the post-drying program starts automatically
to prevent mould or rot from forming in the sauna cabin. This involves heating
the sauna room to 80 °C with the fan running for 30 minutes.
●Auxiliary output
Optional dimming (up to 500 W) or activation (up to 3.5 kW) for the additional
output.
The additional output has no overheat cut-out. For this reason, only intrinsically
safe devices should be operated using the additional output.
– If infrared heaters are connected to the additional output, they must
have an overheat cut-out.
– If infrared heat plates are connected to an additional output, the foil
sensor 1-014-445/P-ISX-FF must be used and activated on the tech-
nician menu (see “9.1. Technician menu” on page 33):
● Remotestartfunctionoftwodi󰀨erentoperatingmodesoruserprograms.
●Colour light control via DMX
– Adjustment of colour, brightness, transition times and duration.
– Four colour light groups independently operable.
●Music playback via Bluetooth®
– Integratedamplier
●Operation via Bluetooth®app
– Available for iOS and Android
●BUS connection
– Connection to house bus system via RS485 interface
– Connection to MySentio WIFI

EN
Instructions for installation and use p. 11/60
3.4. Sauna operating modes
The sauna control unit home.com4 provides two operating modes: sauna mode
and combi-mode. If no evaporator is connected, the menu item for operating the
evaporator can be hidden (see “9.1. Technician menu” on page 33).
Sauna mode
Dry heat is provided in sauna mode. The temperature in the cabin is high
(80 to 100 °C). The humidity is low (no more than 10%).
Combi mode
The vaporizer operates along with the sauna heater in combi-mode. The temper-
ature in the sauna cabin is lower (around 40 to 65 °C) than in sauna mode, but
the relative humidity is much higher, ranging from 35% to 70%. The maximum
humidity that can be set depends on the temperature of the sauna. The higher
the sauna temperature, the lower the maximum humidity level which can be set.
3.5. Sensor operating modes
The sauna control units of the home.com4 series can be operated with one or two
sensors. A temperature sensor (bench sensor, F2) or a humidity sensor (FTS2)
can be used as the second sensor.
Single sensor mode (F1)
The maximum humidity level which can be set in single-sensor mode is based
on the temperature above the heater and the humidity is timed. Only the setpoint
for the humidity (in % relative humidity) is shown on the sauna controller display.
The actual humidity in the sauna cabin when the humidity is timed depends on
thesizeofthecabinandtheevaporatoroutput,andmaydi󰀨erfromthesetpoint.

Instructions for installation and use p. 12/60
Two-sensor mode with bench sensor (F2)
In two-sensor mode with bench sensor, a second temperature sensor (bench
sensor) is installed above the rear sauna bench. The sauna controller displays
the temperature measured by the bench sensor as the actual temperature.
In two-sensor mode with bench sensor, the humidity is timed. Only the setpoint
for the humidity (in % relative humidity) is shown on the sauna controller display.
The actual humidity in the sauna cabin when the humidity is timed depends on
thesizeofthecabinandtheevaporatoroutput,andmaydi󰀨erfromthesetpoint.
Two-sensor mode with humidity/temperature sensor (FTS2)
When a humidity/temperature sensor is used in two-sensor mode, the sauna
control unit displays the temperature which is measured by the humidity/tem-
perature sensor as the actual temperature.
In two-sensor mode with humidity/temperature sensor, the evaporator is regulated
in accordance with the humidity level measured in the sauna room. The sauna
controller displays the actual humidity (in % relative humidity) in the sauna cabin.
If a humidity/temperature sensor is connected, the “evaporator” menu item
cannot be hidden.

EN
Installation instructions, only for experts p. 13/60
Installing the sauna control unit
To install the sauna control unit, perform the following steps:
1. Screw two chipboard screws (3 x 25 mm) into the wall of the sauna at a height
of approx. 1.70 m and leaving a protruding length of 7 mm. The two screws
must be placed at a distance of 156 mm from each other (see Fig. 1).
4. Installation
4.1. Installing the control unit
Observe the following points when installing the sauna control unit:
●The sauna control unit must be installed outside the sauna room or in accord-
ance with the recommendation issued by the sauna manufacturer.
●The ambient temperature must be within a range spanning -10 °C to +40 °C.
●The sensors may only be connected using the sensor leads supplied with the
unit, which are heat-resistant up to 150 °C.
ATTENTION!
Damage to the unit
The sauna controller is resistant to splashing water, but direct contact with water
could still damage it.
●Install the sauna control unit in a dry place at which a maximum humidity of
95% is not exceeded.
The sensor leads may be extended under the following conditions:
●A silicon cable resistant to temperatures up to 150 °C is used.
●The minimum cross-sectional of the cable is 0.5 mm2.
●The heater sensor cables may NOT be longer than 10 m.
ATTENTION!
Interference can impair signal transmission
●Route all sensor cables separately from other mains cables and control cables.
●Protect cables with only one layer of insulation by using a conduit (double
insulation).

Installation instructions, only for experts p. 14/60
Fig. 1 Position of the attachment device and the installation holes
(dimensions in mm)
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A A
B B
B B
A A

EN
Installation instructions, only for experts p. 15/60
ATTENTION!
Whenthehousingcoverisraised,theon/o󰀨switchDand the light switch Dare
released from the mounting. Retain these for the duration of the connection work.
2. Use a screwdriver to remove housing screw Candlifto󰀨thehousingcover
from the underside (see Fig. 2).
Fig. 2 Remove housing cover
C
E
Fig. 3 Unplug ribbon cable
3. Pull gently on ribbon cable Eto release it from the connection socket (Fig. 3).
D

Installation instructions, only for experts p. 16/60
4. Fasten the sauna control unit onto the cross-head screws using attachment
device Aas an aid (see Fig. 1).
5. Screw two chipboard screws (3 x 25 mm) into the lower fastening holes B
(see Fig. 1).
4.2. Cable glands
Power, supply and sensor cables should be laid in advance in the cabin wall and
pulled through the respective cable glands of the sauna control unit.
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1Low-voltage connection area for basic module: Heater sensor (F1), bench sensor (F2),
humiditysensor(FTS2),safetyshut-o󰀨(OSG)andBUSconnection
2Connection area for basic module for 230 V / 400 V: Supply line, heater cable, light and fan.
Expansion module:
3Connection area for 230 V: Additional output and booster cable.
4 Connection area for low voltage: Speaker cables, remote start, foil sensor and DMX.
1
2
4 3
230 V / 400 V
230 V / 400 V
Fig. 4 Connection areas

EN
Installation instructions, only for experts p. 17/60
4.3. Installing the heater sensor F1 with overheat cut-out
Note the following points when installing the heater sensor:
●The heater sensor must be installed on the rear of the heater, above the middle
of the sauna heater. A distance of about 15 cm from the ceiling of the cabin
must be maintained.
●Theheatersensormustbeinstalledinsuchawaythatitisnota󰀨ectedby
inowingair.
To install the heater sensor, carry out the following steps (see Fig. 5):
1. Route the two 2-pole heater sensor leads in the wall of the sauna room to
themountinglocationoftheheatersensoranda󰀩xtheheatersensorleads
using cable clips.
2. Pull the two half-shells 1of the heater sensor apart.
3. Connect the four connections for the heater sensor lead 5in accordance
with Fig. 5.
4. Place the connection panel 2crossways (as shown in Fig. 5) in the heater
sensor half-shells.
5. Place the two half-shells together, screw them together using two cross-head
screws 3(9 mm) and check whether the heater sensor has been securely
closed.
6. Install the heater sensor on the rear of the heater using the two supplied
wood screws 6(16 mm).
1Heater sensor half-shells
2Connection panel
3Cross-head screws (9 mm)
4Heater sensor
5Heater sensor leads
6Wood screws (16 mm)
Fig. 5 Installing
the heater sensor
Red White White Red

Installation instructions, only for experts p. 18/60
4.4. Installing the bench sensor F2 (optional)
The bench sensor must be installed on the wall of the cabin above the rear bench
seat. A distance of about 15 cm from the ceiling of the cabin must be maintained.
To install the bench sensor, carry out the following steps:
1. Route the 2-pole bench sensor lead in the wall of the sauna room to the
mountinglocationofthebenchsensoranda󰀩xthebenchsensorleads
using cable clips.
2. Pull the two half-shells of the bench sensor apart.
3. Connect the two connectors for the bench sensor lead to the two middle
terminals on the connection panel.
4. Place the connection panel crossways in the bench sensor half-shells.
5. Place the two half-shells together and screw them together using the two
cross-head screws (9 mm).
6. Check whether the bench sensor has been securely closed.
7. Install the bench sensor on the wall of the sauna room using the two supplied
wood screws (16 mm).
4.5. Installing the humidity/temperature sensor FTS2
(optional)
The humidity/temperature sensor must be installed on the wall of the sauna
room above the rear bench seat. A distance of about 15 cm from the ceiling of
the cabin must be maintained.
To install the humidity and temperature sensor, perform the following steps:
1. Route the 5-pole sensor cable in the wall of the sauna room to the mounting
positionofthehumidity/temperaturesensoranda󰀩xthesensorleadsusing
cable clips.
2. Install the humidity/temperature sensor to the wall of the sauna room using
the two supplied wood screws (16 mm).
4.6. Installing the foil sensor (optional)
If a sentiotec infrared heat plate is connected to the additional output, foil sensor
1-014-445 / P-ISX-FF must be used.
●Wheninstallingthefoilsensor,observetheoperatinginstructionsfor
the infrared heating plates.
●Useofafoilsensormustbeactivatedonthetechnicianmenu.

EN
Installation instructions, only for experts p. 19/60
5. Electrical connection
ATTENTION!
Damage to the unit
●The sauna control unit may only be used for operating and controlling 3
heating circuits with a maximum heating capacity of 3.5 kW per heating
circuit. The maximum evaporator output totals 3.5 kW. The maximum addi-
tional output totals 3.5 kW.
1Cable gland for FTS2 sensor, RS485 BUS line
2CableglandforF1sensor,F2sensorandsafetycut-o󰀨
3Cable gland for vaporizer cable
4Bushing for heater cable
5Bushing for power supply cable
6Cable gland for light and fan
7Cable gland for loudspeaker cables and DMX cable
8Cable gland for remote start and foil sensor
9Cable gland for additional output
aCable gland for power booster
b Groundbusbar
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1 2 3 4 5 6
7 8 9 a
b

Installation instructions, only for experts p. 20/60
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f
c
d
e
g
h
bGroundbusbar
cTerminalstripforsafetyshut-o󰀨andsensorcables
dTerminal strip for cables for heater, vaporizer and power supply
eTerminal strip for lights and fan
fTerminal strip for DMX, loudspeakers, remote start and foil sensor
gTerminal strip for additional output
hTerminal strip for power booster
iBUS interface for RS485 (RJ45)
b
i