KOSTER GEOS-CONTROL 12 User manual

OPERATING MANUAL
GEOS SAUNA HEATER CONTROL UNIT
Please read this instruction manual carefully before installing and using the control unit.
Keep it at hand throughout the entire life of the control unit.

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This Operating Manual (OM) applies to the electric sauna heater control unit (hereinafter control unit).
The OM contains information about the control units design, specifications, installation, safe operation,
storage, and disposal.
CAUTION! Before installing and operating your control unit, please read and understand this OM. Do
not let anyone install and operate the control unit before reading and understanding this OM!
CAUTION! Power connection shall be done by certified professionals in accordance with the Rules for
Electrical Installation(PUE).
The OM also comprises supporting documents to be filled in by the retailer and the installation and
maintenance contractors. This is a prerequisite to make the warranty valid.
CAUTION! See that the retailer and the installation and maintenance contractors have filled in
respective sections of the OM. Remember that if the retailer fails to execute the Certificate of Sale, the
warranty will start from the equipment's date of manufacture.
The manufacturer reserves the right to make changes to the design of the control unit provided these
changes do not adversely affect the item's consumer properties.
1
INTRODUCTION
CON TE NT S
SAUNA HEATERS, GARDEN FIRE PITS, SOLID FUEL BOILERS
INTRODUCTION
GENERAL
Design and operation
Components
Specifications
CONTROL UNIT INSTALLATION
CONTROL UNIT OPERATION
Control unit settings
Operating modes of the control unit
Troubleshooting
WARRANTY
TRANSPORT AND STORAGE
DISPOSAL
DATASHEET
Delivery package
Certificate of Acceptance
Certificate of Sale
Record of connection
Record of warranty repair
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2
3
6
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8
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The control unit is designed to operate electric sauna heaters produced by various manufacturers.
The control unit is designed to set and adjust the following electric heater operating parameters:
switch-on time, operating temperature, and time of operation. Depending on the pre-set parameters,
the control unit automatically switches on the electric heater, heats it up, maintains the required
temperature, and switches the heater off.
Design and operation
The control unit comprises a control box, a switching unit with a built-in power supply, and a
temperature sensor.
The control unit and switching unit are installed outside of the steam room and connected together
by a cable. The temperature sensor is installed inside the steam room and connected to the switching
unit with a heat-resistant wire.
Using the control unit, the user can set the temperature, time of operation, and the time when the
electric heater will switch off.
The control unit has the following modes:
- Stand-by mode
- Electric heater operating parameters adjustment mode
- Operation mode
In the operation mode, the control unit ensures the following electric heater operating conditions:
Heating of the steam room. In this mode, the electric heater's tubular heating elements are
continuously on until a pre-set steam room temperature is reached. The “Power” indicator on the
control box's faceplate is lit red.
Maintaining the temperature. When the pre-set temperature is reached, the tubular heating elements
switch off and the control unit goes into the temperature maintaining mode. In this mode, the control
box monitors the steam room temperature using the temperature sensor. When the actual
temperature is 3 °C lower than the pre-set temperature, the tubular heating elements switch on and
the temperature rises to the pre-set value.
The temperature maintaining mode lasts until the electric heater is switched off.
When the electric heater's pre-set time of operation elapses, the control unit switches the tubular
heating elements off, and the control box goes into the standby mode.
To switch off the control unit, press the encoder knob and hold it for 2 seconds.
GENERAL
OB VIO US ADVANTAG ES. INFORMED C H OI CE

Components of the control unit
A general view of the control unit is shown
in Figure 1a. The control unit comprises:
Control box (1)
Switching unit with a built-in 12 V
power supply (2)
Temperature sensor (3)
Cable (4)
Feeder cable (5) (not included in the
delivery package)
Power cable (6) (not included in the
delivery package)
Electric sauna heater (7) (not included
in the delivery package)
Control box (Fig. 1b):
Faceplate (10)
Cover (11)
Backplate (12)
Control board (13)
Knob (14)
End cover (15)
3
Fig. 1b. Control box
Fig. 1a. General view
10
11
13
14
15
12
1
5
6
7
~380 В
1
2
3
4
7
5000max
5000max
SAUNA HEATERS, GARDEN FIRE PITS, SOLID FUEL BOILERS
The body of the control box consists of an assembled backplate (12), a cover (11), an end cover (15), and
has a control board (13) inside. The faceplate (10) with control pictograms is glued to the body's cover.
The control box is operated by means of an encoder with a knob (14). The control unit is operated by
pressing and turning the encoder knob.
The control box is connected to the switching unit via a connector hole in the end cover (15).

4
Fig. 1c. Faceplate
The control box faceplate (Fig.1c)
accommodates the encoder knob (14) and a
display (10.1) showing adjusted or current
values of operating parameters. The
faceplate also has four LEDs showing the
current state of the control unit (10.2), steam
room temperature (10.3), electric heater
operation time(10.4), and time to switch-on
(delayed start) (10.5.).
Switching unit (Fig. 1d):
Body (20)
Cover (21)
Terminal block (22)
Switching unit board (23)
10.1
14
10.2
10.4
10.5 10.3
Fig.1d. Switching unit
The switching unit comprises a body (20) with a power board (23) and a terminal block (22) inside.
The power board accommodates relay switches connected to the terminal block with busbars, and
terminals to connect the temperature sensor (3), power supply unit (4), and the control box's cable (5).
The switching unit's body is protected with a cover (21).
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To 3-phase mains
To the electric heater
To single-phase mains (N)
To single-phase mains (L1)
Using jumpers
To single-phase mains (РЕ)
To the electric heater
SAUNA HEATERS, GARDEN FIRE PITS, SOLID FUEL BOILERS

Specifications
Control unit model
Maximum power
of the electric heater, kW*
Supply voltage, V
Control voltage, V
Frequency, Hz
Temperature adjustment range, C
Hysteresis, C
Maximum time of operation, h
Maximum start delay, h
Control box dimensions, WхHхD, mm
Switching unit dimensions, WхHхD, mm
Weight, g
Operating temperatures of control box and
switching unit, C
Relative humidity of the air of control box and
switching unit, %
Operating temperature of temperature sensor, C
Storage temperature, С
Type of installation
GEOS-CONTROL 12
12
GEOS-CONTROL 18
18
220/380*
12
50 (60)
40 - 120
3
6
24
140х121х50
200х150х72
1100
0 to 35
45-80
0 to 130
Minus 10 to plus 60
indoor
Note: *no more than 30 A per relay switch.
6
Electrical equipment shall be installed and connected in accordance with PUE and GOST R IEC
60335-2-53 by certified electricians with an electrical safety access qualification level III or higher.
CAUTION! Before connecting and installing the control unit, make sure to check its completeness. It
should be in accordance with the delivery list that can be found in the item's datasheet.
CAUTION! When connecting and installing the control unit, follow the sequence of operations pro-
vided in this OM.
To uninstall and disconnect the control unit, reverse the installation/connection sequence.
Fire safety requirements
CAUTION! Control units and electric heaters (sauna heaters) shall be installed and operated in accor-
dance with Resolution of the Government of the Russian Federation No. 390 dated 25 April 2012 (as
amended on 6 April 2016) On the Fire Safety Regime and with the Fire Safety Regime Rules in the
Russian Federation.
CONTROL UNIT INSTALLATION
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The power of the electric heater must correspond to the size of the steam room.
The steam room should be at least 1.9 m high.
The sauna should have natural ventilation. Air intake and exhaust should be located diagonally at the
top and bottom of the heated room, but not in the corner where the electric heater is placed.
The temperature sensor must be connected to the switching unit using the wires supplied in the de-
livery package. The electric heater must be connected to the switching unit using appropriately sized
heat-resistant insulated wires (see Table 2).
Before installing the control unit, check its integrity and completeness, and make sure the model of
the control unit selected is appropriate for the electric heater model.
The length of connecting wires shall be as follows:
- Control cable (4) from switching unit to control unit - 5 m
- Temperature sensor wire (3) from switching unit to temperature sensor - 5 m
The control unit's wiring diagram is shown in Fig. 1d.
CAUTION! Before starting the wiring, make sure the power supply to which the electric heater and
the control unit are connected is de-energised.
The control box shall be installed outside of the steam room. To mount the control box, drive impact
anchors with a diameter of 4 mm (not included in the delivery package) into the wall in one horizon-
tal line at 79 mm intervals. Hang the control box onto the impact anchors using the dedicated holes
at the rear of the box's body.
CAUTION! The control box shall be mounted within no more than 5 m from the switching unit. If the
distance between the control box and the switching unit exceeds 5 m, avoid extending the standard
cable; instead, use a 4x0.2 KSPVG cable (PE-insulated PVC-sheathed flexible communication cable)
of appropriate length with TP 4p4c (RJ11) connectors, and follow the wiring sequence applicable to
the standard cable.
The switching unit shall be mounted outside of the steam room using two impact anchors with a di-
ameter of 6 mm. The switching unit can be installed inside a switchboard or covered with a panel
cover.
The temperature sensor shall be installed inside the steam room. For accurate readings, the sensor
should be placed directly above the electric heater 1.8 to 2.0 m above the floor and at least 1.2 to 1.5
m above the sauna heater.
An installation contractor's representative putting the control unit into operation shall brief the user
on safe operation and maintenance of the control unit, and specify which operations can be done by
the user and which ones require a qualified serviceman.
The installation contractor's representative shall make a record and sign and stamp the warranty cer-
tificate. Without such records the warranty certificate shall be considered invalid and the manufacturer
SAUNA HEATERS, GARDEN FIRE PITS, SOLID FUEL BOILERS

Switching the control unit on (Fig. 2)
Press and hold the encoder knob to switch the control unit on. The
display will light up and show the current steam room temperature,
and the indicator will turn red .
Temperature adjustment (Fig. 3)
To adjust the temperature, press the encoder knob lightly. The indi-
cator will turn orange. Set the temperature by turning the en-
coder knob; the displayed value will change accordingly. As the
knob is turned, the temperature changes by 1 C. The temperature
can be adjusted from 40 to 120 C.
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Control unit model
GEOS-CONTROL 12
GEOS-CONTROL 18
Mains/
connection
220/380 Y
380 Y
Automatic circuit
breaker
3-pole 25 A
3-pole 32 A
Feeder cable,
2
mm
4
6
Power cable,
2
mm
4
6
Control cable,
grade
4x0.2 KSPVG
Sensor wire,
grade
2х0.2 MGTFE
CONTROL UNIT OPERATION
Control unit settings
The control unit has a four-icon display and four indicators to
adjust and display the parameters. All adjustments are made by
pressing and turning the encoder knob. To switch the control unit
on or off, press and hold the knob for 2 s; to switch from one
adjustment mode to another, press the knob for less than 1 s; to
set a parameter to a needed value, turn the knob.
Fig. 2 — Switching on
shall not perform warranty repair.
The control unit shall be wired in accordance with the wiring diagram in Fig. 1d. Connection to the sin-
gle-phase (220 V) mains shall be performed as shown in Fig. 1e.
The control unit shall be wired as follows:
- Connect the temperature sensor's wire to the respective connector in the switching unit's board.
- Connect the power wires (U, W, V, N) from the electric heater to the terminal block.
- Connect the feeder wires (L1, L2, L3, N) from 380 V mains to the terminal block.
- Connect the grounding wire.
- Connect the control cable to the respective connector in the switching unit's board.
Cross-sections and grades of wires and current ratings of automatic circuit breakers are provided in
Table 2.
Fig. 3 — Temperature adjustment
OB VIO US ADVANTAG ES. INFORMED C H OI CE

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Fig. 4 — Adjustment of the electric
heater's time of operation
Adjustment of time of operation (Fig. 4)
To access the operation time adjustment mode, press the encoder
knob to see the indicator turn orange. Then turn the encoder
knob to change the electric heater's time of operation. The default
time of operation is 4 hours. As the knob is turned, the time of op-
eration changes by 5 minutes. The time of operation can be ad-
justed from 1 to 6 hours.
Adjustment of delayed start (Fig. 5)
With another pressing of the knob, the device switches to the electric
heater's delayed start adjustment mode, and the indicator lights
up. In this mode, you may delay the switching on of the sauna heater
from 5 minutes to 24 hours. Turning of the encoder knob will change
the remaining time to switching on of the electric heater. When you
turn the knob, the adjusted parameter changes by 5 minutes. With an-
other pressing of the knob, the control unit will switch to the stand-
by mode. Fig. 5 — Delayed start adjustment
The default delayed start time is zero. If you skip this setting (press the encoder knob but do not set
the delayed start time), the control unit will switch to the ON mode.
Operating modes of the control unit
The control unit's operation is indicated by the LED . If the indicator is green, the electric heater's
tubular heating elements are switched on; if the indicator is red, they are switched off.
Stand-by mode (Fig. 6a)
When delayed start time is set and the operation mode is on, the indicator turns red and the dis-
play starts counting down the time to the switching on of the electric heater. When this time elapses,
the control unit switches to the ON mode.
ON mode (Fig. 6b)
In the ON mode, the indicator turns green, the display shows the current steam room tempera-
ture, the electric heater's tubular heating elements switch on, and the steam room temperature
starts rising to the pre-set value. After that, the electric heater's tubular heating elements switch
off and remain off until the temperature drops 3 C below the pre-set value (hysteresis); as this hap-
pens, the control unit restarts the tubular heating elements.
Fig.6 — Modes of operation
a)b)
SAUNA HEATERS, GARDEN FIRE PITS, SOLID FUEL BOILERS

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Cause of malfunction
The control cable is damaged or not in
place
The power cable is damaged
The switching unit is broken
The control box is broken
The temperature sensor is not
connected
The temperature sensor is damaged
The temperature sensor is faulty
The control cable is damaged or not in
place
The temperature sensor is faulty
Potential malfunctions
The control unit is on, but
there is no heating
The control unit is on, the
display shows E1
The current temperature
displayed is not the
actual temperature
Troubleshooting method
Check the control cable
Replace the power or feeder
cable
Replace the switching unit
Replace the control box
Make sure the temperature
sensor is connected
Replace the temperature sensor
Replace the temperature sensor
Check the control cable
Replace the temperature sensor
Switching the control unit off
To switch the control unit off, press and hold the encoder knob. The tubular heating elements will
switch off and the display and indicators will turn off. When the control unit is switched off, its
most recent temperature setting is saved, while the control unit's time of operation and delayed
start time are reset to default values.
Troubleshooting
The switching unit is not connected
The control cable is damaged or not
in place
The feeder cables are damaged
Fatal software failure
The control unit does not
switch on
Other
Connect the switching unit
Check the control cable
Change the cables
Disconnect the control cable
from the control unit board.
Connect the control unit.
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WARRANTY
The item meets the safety requirements as set forth by applicable regulatory references.
Control unit warranty service life: 12 months from the date of sale through a retail network.
Control unit service life — 5 years minimum.
CAUTION! If the Operating Manual has no date of sale and retailer stamp, the warranty period will
be calculated from the date of manufacture.
The control unit shall be shipped in the original package. Violation of this condition releases the
manufacturer from any claims as to mechanical damages incurred during shipment.
Any defects ascribed to the manufacturer will be remedied free of charge.
CAUTION! No claims as to the item's performance will be accepted, and no warranty repairs or
replacements will be done in the following cases:
- The defect is caused by negligent handling
- The user did not follow the installation, operation, and maintenance instructions
- The user or a third party stored or transported the item in an improper manner
- The item was not used for its intended purpose
- The item was repaired by the user or a third party without proper qualification
- The warranty period has expired
CAUTION! The manufacturer reserves the right to make changes to the design of the control unit
provided these changes do not adversely affect the item's consumer properties.
TRANSPORT AND STORAGE
The control unit's dimensions and weight allow shipment by any transport. If needed, the control unit
can be uninstalled and transported to another place of operation or storage.
If the item was transported at negative temperatures, keep it in the original packaging at a normal
temperature for at least three hours.
DISPOSAL
Control units that became inoperable through improper operation, failures, or expired service life shall
be disposed of.
The control unit contains no environmentally hazardous materials or accessories, and therefore can be
disposed of in a regular way.
SAUNA HEATERS, GARDEN FIRE PITS, SOLID FUEL BOILERS

12
Q-ty, pc
1
1
1
1
1
Delivery package
Control box
Switching unit
Temperature sensor with a 5 m heat-resistant wire
Control cable, 5 m
Operating Manual
DATASHEET
Certificate of Acceptance
Control Unit GEOS CONTROL 12 GEOS CONTROL 18
Serial number:
Date of manufacture:
Quality inspector:
Packer:
Stamp here
Certificate of Sale
Name of retailer:
Date of sale: : «____» ___________ 20____г.
Stamp of retailer:
I have no claims to the quality of the product:
(Buyer's signature)
The control unit has been manufactured to meet the design documentation package.
Designer and Manufacturer: Teslatec Limited Liability Company
12 Permskaya St., Novosibirsk, Russia, phone[phone]
www.teslatec.ru
OB VIO US ADVANTAG ES. INFORMED C H OI CE

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Record of connection
Date Installation contractor Installation contractor's
stamp
Name and signature
of electrician
Connection
Disconnection
Connection
Disconnection
Record of warranty repair
Description of defect:
Cause of malfunction:
Description of repair:
Date of repair: : «____» __________ 20____г.
Name of service contractor:
Serviceman /
Quality inspector /
(signature) (name)
(signature) (name)
SAUNA HEATERS, GARDEN FIRE PITS, SOLID FUEL BOILERS

Manufacturer: Teslatec LLC, 12 Permskaya St., Novosibirsk, [phone]
www.teslatec.ru
Manufacture for: Koster LLC, 60/9 Stantsionnaya St., Novosibirsk, tel.: [phone]
www.koster.pro