Harvia sentiotec home.com4 User manual

Version 12/17 ID no. XM1254A
EN
INSTRUCTIONS FOR INSTALLATION AND USE
English
Sauna control unit
home.com4
Sauna control unit home.com4 BLACK 1-040-275
Sauna control unit home.com4 WHITE 1-040-276
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 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-off 23
5.8. Additional 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. Finishing the installation 26
6. Performing tests 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 40
10.7. Fan 40
10.8. Preset time 41
10.9. Operating time 42

10.10. ECO mode 42
10.11. Weekly timer 44
10.12. Child safety control 46
10.13. All Off 46
10.14. User programs 46
10.15. Additional output 48
10.16. Activating standby for remote operation 50
10.17. Coloured light 51
10.18. Music 52
11. App 55
12. Cleaning and maintenance 56
12.1. Cleaning 56
12.2. Maintenance 56
13. Disposal 56
14. Troubleshooting 57
14.1. Error messages 57
14.2. Low-water display 57
14.3. Fuses 60
14.4. Battery 61
15. Technical data 62

EN
Instructions for installation and use p. 5/64
1. About this instruction manual
Read these installation and operating instructions carefully and keep them within
reach of the sauna control unit. This ensures that you can refer to information
about your safety and the 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. 6/64
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 occur during use. Therefore adhere

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

as satisfying the combustion test described in paragraph 19.101 of
EN 60335-2-53. Alternatively, a suitable safety shut-off device can
be installed in or above the heater.
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 va-
porizer capacity is 3.5 kW. The maximum additional output capacity
is 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. 7/64
2.2. Safety information for the installer
 

Work on the sauna control unit may only be performed when the
power has been disconnected.
A fully disconnecting all-pole isolating device compliant with

The sauna control unit must be installed outside the sauna room
at a height of approx. 1.70 m or in accordance with the recom-
mendation issued by the sauna manufacturer. The ambient
temperature must be within a range spanning -10 °C to +40 °C.
The heater sensor must be attached in a way that it is not affected

The heater supply cable must have a minimum cross-sectional
area of 2.5 mm2 and 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-

instructions.

Instructions for installation and use p. 8/64
2.3. Safety information for the user
The sauna control unit must not be used by children under 8 years
old.
The sauna control unit may be used by children above 8 years
old, by persons with limited psychological, sensory or mental
capabilities or by persons with lack of experience/knowledge
only when:
– 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 control unit.
Children under 14 years of age may only clean the sauna control
unit if they are supervised.
 -
ence of alcohol, medication or drugs.
-
na heater before the sauna control unit is switched on.
-
na heater before activating the preset time function or the standby
mode for remote start.

of the infrared lamp before the sauna control unit is switched on.

front of the infrared lamp 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


EN
Instructions for installation and use p. 9/64
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 shut-off (1-027-796/HT-SWL)
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)
Intensity regulation of a fan (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

according to user requirements.
Automatic heating period limiter
The maximum heating period can be set to 6 h, 12 h, 18 h or 24 h.

Instructions for installation and use p. 10/64
Overheat cut-out
The overheat cut-out is installed in the housing for the heater sensor. Should
the sauna heater continue heating after reaching the preferred temperature
due to a defect, the overheat cut-out switches the sauna heater off at a tem-
perature of approx. 139 °C.
Real-time clock with weekly timer
Post-drying program

to prevent mould or rot from forming in the sauna room. This involves heating
the sauna room to 80 °C with the fan running for 30 minutes.
Additional 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 infra-red heaters are connected to the additional output, they must
have an overheat cut-out.
– If infra-red heater panels are connected to an additional output, the foil
sensor 1-014-445/P-ISX-FF must be used and activated on the techni-
cian menu (see “9.1. Technician menu” on page 33):
Remote start function of two different 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®
– 
Operation via Bluetooth® app
– Available for iOS and Android

EN
Instructions for installation and use p. 11/64
3.4. Sauna operating modes
The sauna control unit home.com4 provides two operating modes: sauna mode
and combi-mode. If no vaporizer is connected, the menu item for operating the
vaporizer can be hidden (see “9.1. Technician menu” on page 33).
Sauna mode
Dry heat is provided in sauna mode. The temperature in the room is high
(80 to 100 °C) The maximum humidity level of 10% is low.
Combi-mode
The vaporizer operates along with the sauna heater in combi-mode. The temper-
ature in the sauna room is lower (approx. 40 to 65 °C) than in sauna mode, with
the relative humidity being considerably higher, spanning 35% to approximately
70%. The maximum humidity level which can be set depends on the tempera-
ture 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 set
value for the humidity level (in % of relative humidity) is displayed by the sauna
control unit. The actual humidity level in the sauna room when humidity is timed
depends on the size of the room and the vaporizer capacity and may deviate
from the set value.

Instructions for installation and use p. 12/64
Two-sensor mode with bench sensor (F2)
In two-sensor operation with bench sensor, a second temperature sensor (bench
sensor) is installed above the rear sauna bench. The sauna control unit 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 set val-
ue for the humidity level (in % of relative humidity) is displayed by the sauna
control unit. The actual humidity level in the sauna room when humidity is timed
depends on the size of the room and the vaporizer capacity and may deviate
from the set value.
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 vaporizer is regulated
in accordance with the humidity level measured in the sauna room. The actual
value for the humidity level (in % of relative humidity) is displayed by the sauna
control unit.
If a humidity temperature sensor is connected, the “vaporizer” menu item cannot
be hidden.

EN
Installation instructions, only for experts p. 13/64
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 control unit is protected against splashing water, however direct
contact with water could still damage the unit.
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 lead resistant to temperatures up to 150 °C is used.
The minimum cross-sectional area of the wire is 0.5 mm2.
The length of the heater sensor leads must NOT exceed 10 m.
ATTENTION!
Sources of interference can have a negative effect on signal transmission
Route all sensor leads separately from other mains cables and control leads.
Use conduit to protect wires with only one layer of insulation (double insulation).

Installation instructions, only for experts p. 14/64
Fig. 1 Position of the attachment device and the installation holes
(dimensions in mm)
156
193
238
156
238
193
193
85 200
53
A A
B B
B B
A A

EN
Installation instructions, only for experts p. 15/64
ATTENTION!
When the housing cover is raised, the on/off switch D and the light switch D are
released from the mounting. Retain these for the duration of the connection work.
2. Use a screwdriver to remove housing screw C and lift off 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 E to release it from the connection socket (Fig. 3).
D

Installation instructions, only for experts p. 16/64
4. Fasten the sauna control unit onto the cross-head screws using attachment
device A as 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.
156
193
238
156
238
193
193
85 200
53
1 Low-voltage connection area for basic module: Heater sensor (F1), bench sensor (F2),
humidity sensor (FTS2) and safety shut-off (OSG).
2 Connection area for basic module for 230 V / 400 V: Supply line, heater cable, light and fan.
Expansion module:
3 Connection 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. 17/64
4.3. Installing the heater sensor F1 with overheat cut-out
Observe the following points when installing the heater sensor:
The heater sensor must be installed on the rear of the heater, above the mid-
dle of the sauna heater. A clearance of approx. 15 cm from the ceiling of the
sauna room must be maintained.
 
of air.
To install the heater sensor, perform the following steps (see Fig. 5):
1. Route the two 2-pole heater sensor leads in the wall of the sauna room to

using cable clips.
2. Pull the two half-shells 1 of the heater sensor apart.
3. Connect the four connections for the heater sensor lead 5 in accordance
with Fig. 5.
4. Place the connection panel 2 crossways (as shown in Fig. 5) in the heater
sensor half-shells.
5. Place the two half-shells together, screw them together using the 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).
1 Heater sensor half-shells
2 Connection panel
3 Cross-head screws (9 mm)
4 Heater sensor
5 Heater sensor leads
6 Wood screws (16 mm)
Fig. 5 Installing the
heater sensor
Red White White Red

Installation instructions, only for experts p. 18/64
4.4. Installing bench sensor F2 (optional)
The bench sensor must be installed on the wall of the sauna room, above the
rear bench seat. A clearance of approx. 15 cm from the ceiling of the sauna
room must be maintained.
To install the bench sensor, perform the following steps:
1. Route the two 2-pole bench sensor leads in the wall of the sauna room to

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 clearance of approx. 15 cm from the ceiling of the
sauna room must be maintained.
To install the humidity temperature sensor, perform the following steps:
1. Route the two 5-pole bench sensor leads in the wall of the sauna room to the

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.
-
frared heating plates.


EN
Installation instructions, only for experts p. 19/64
5. Electrical connection
ATTENTION!
Damage to the unit
The sauna control unit may only be used for operating and controlling 3 heat-
ing circuits with a maximum heating capacity of 3.5 kW per heating circuit.
The maximum vaporizer capacity totals 3.5 kW. The maximum additional
output capacity totals 3.5 kW.
1 Cable gland for FTS2 sensor
2 Cable gland for F1 sensor, F2 sensor and safety cut-off
3 Cable gland for vaporizer cable
4 Cable gland for heater cable
5 Cable gland for power supply cable
6 Cable gland for light and fan
7 Cable gland for loudspeaker cables and DMX cable
8 Cable gland for remote start and foil sensor
9 Cable gland for additional output
a Cable 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. 20/64
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f
c
d
e
g
h
b Ground busbar
c Terminal strip for safety shut-off and sensor cables
d Terminal strip for cables for heater, vaporizer and power supply
e Terminal strip for lights and fan
f Terminal strip for DMX, loudspeakers, remote start and foil sensor
g Terminal strip for additional output
h Terminal strip for power booster
b