HARVIA D23EE Electric Sauna Heater Instruction Manual
- October 26, 2023
- HARVIA
Table of Contents
XY-MD02 Sensor Setting - Modbus RTU...
XY-MD02 Sensor Setting - Modbus RTU Network
HARVIA D23EE Electric Sauna Heater
Purpose of the electric heater:
The Delta EE heater is designed for the heating of small family saunas to bathing temperature. It is forbidden to use the heater for any other purposes. The guarantee period for heaters and control equipment used in saunas by families is two (2) years. The guarantee period for heaters and control equipment used in saunas by building residents is one (1) year. Please read the user’s instructions carefully before using the heater.
NOTE!
These instructions for installation and use are intended for the owner or the
person in charge of the sauna, as well as for the electrician in charge of the
electrical installation of the heater. After completing the installation, the
person in charge of the installation should give these instructions to the
owner of the sauna or to the person in charge of its operation.
Congratulations on your choice!
INSTRUCTIONS FOR USE
Piling of the Sauna Stones
The sauna stones for an electric heater should be 4–8 cm in diameter. The heater stones should be solid blocks of stone specially intended for use in the heater. Neither light, porous ceramic “stones“ of the same size nor soft potstones should be used in the heater, because they may cause the resistance temperature to rise too high as a result of which the resistance may be broken. Stone dust should be washed off before piling the stones. The stones should be piled into the stone compartment over the grating, between the heating elements (resistances) so that the stones support each other. The weight of the stones should not lie on the heating elements. The stones should not be piled too tightly, so that air can flow through the heater. The stones should be fitted loosely, and not wedged between the heating elements. Very small stones should not be put into the heater at all. The stones should completely cover the heating elements. However, they should not form a high pile on the elements. See fig. 1.
The stones disintegrate with use. Therefore, they should be rearranged at least once a year or even more often if the sauna is in frequent use. At the same time, any pieces of stones should be removed from the bottom of the heater, and disintegrated stones should be replaced with new ones. The guarantee does not cover any faults caused by the use of stones not recommended by the plant.
Neither does the guarantee cover any faults caused by disintegrated or too small stones blocking the heater ventilation. No such objects or devices should be placed inside the heater stone space or near the heater that could change the amount or direction of the air flowing through the heater, thus causing the resistance temperature to rise too high, which may set the wall surfaces on fire!
Heating of the Sauna
When the heater is switched on for the first time, both the heater and the stones emit smell. To remove the smell, the sauna room needs to be efficiently ventilated. The purpose of the heater is to raise the temperature of the sauna room and the sauna stones to the required bathing temperature. If the heater output is suitable for the sauna room, it will take about an hour for a properly insulated sauna to reach that temperature. See item 2.1., ”Insulation an Wall Materials of the Sauna Room”. A suitable temperature for the sauna room is about + 65 °C – +80 °C.
The sauna stones normally reach the required bathing temperature at the same time as the sauna room. If the heater capacity is too big, the air in the sauna will heat very quickly, whereas the temperature of the stones may remain insufficient; consequently, the water thrown on the stones will run through. On the other hand, if the heater capacity is too low for the sauna room, the room will heat slowly and, by throwing water on the stones, the bather may try to raise the temperature of the sauna. However, the water will only cool down the stones quickly, and after a while the sauna will not be warm enough and the heater will not be able to provide enough heat.
In order to make bathing enjoyable, the heater capacity should be carefully chosen to suit the size of the sauna room. See item 2.3. ”Heater Output”.
Resetting the overheating limiter
The components of the sensor box monitor the functioning of the control unit. The temperature sensor and the overheating limiter are located in the sensor box. The temperature is sensed by an NTC thermistor, and there is an overheating limiter that can be reset. In case of malfunction, this overheating limiter will cut off the heater power permanently (the overheating limiter can be reset by pressing the reset button, see Figure 11).
Heater’s control units
Heater models D23EE, D29EE and D36EE are equipped with an internal electronic power regulating unit which is controlled by a computer and separate thermostat. Anyone using the heater can program the sauna’s temperature and the duration of the operating time from the external control panel (see diagram 2). Furthermore, by pressing a button on the panel the heater can be programmed to come on at the desired pre-setting time. The heater’s factory settings are as follows:
- temperature +80 ºC
- operating time 4 hours (programmable)
- pre-setting time 0 hours (programmable; max 18 hours)
Before you switch the heater on check always that there aren’t any things over the heater or in the near distance of the heater. See item 1.6. “Warnings”.
- Display screen
- Heater on/off switch
- Operation selection button
- Number setting button
- Number setting button
- Temperature indicator light
- Timing operation indicator light
Switching the heater on and off
When the heater is connected to the power supply and the electric switch on the side of the connection box at the front part (see diagram 8) is switched on (position 1), the heater is in standby mode (I/0 button’s background light glows). The heater switches on when the I/0 button is pressed (2). The heater makes a sound signifying that the safety switch has come on. The same button can also be used to switch the heater off. When the heater is switched on, the display screen shows the factory-set temperature of 80 degrees and the temperature indicator light on the screen (6) flashes for a while until the display eventually shows the temperature in the sauna room. If the heater is not switched off by means of the button I/0 (2), it will turn itself off automatically when the pre-programmed factory-set time for the heater to be on (4 hours) is reached.
Setting the temperature
Using the MENU switch (3) information on the sauna’s temperature, pre-set time and operating time can be programmed to appear in the display screen. Select temperature reading to appear in the screen (indicator light 6 flashes). The operating time temperature may be increased using the [+] button (5) or decreased using the [–] button (4). Pressing on the button for a longer time will speed the process up. When the desired temperature has been set and indicator light 6 has stopped flashing the screen will then show the temperature in the sauna room (indicator light 6 glows). When the heater is switched on the next time the temperature set on the previous occasion will appear in the screen.
Setting the operating time
The MENU button can be used to select the operating time to appear in the screen (indicator light 7 comes on). The [–]-button (4), can be used to decrease the factory-set operating time (4 hours) as required to a minimum time of 30 minutes. Pressing the button the first time reduces the time by 30 minutes, after which the time is reduced by intervals of ten minutes. [+] button (5) can be used to correct the setting. When the desired operating time has been set the screen will then show the temperature in the sauna room (indicator light 6 glows).
The shown operating time decreases at intervals of 10 minutes until zero appears and the heater automatically switches off. To show that the heater has switched itself off, just the I/O switch indicator light will glow. When the heater is switched on the next time any operating time for the heater to remain on that differs from the factory setting must be reprogrammed.
Setting the pre-setting times
If [+]-button (5) is used to overstep the operating time shown in the screen (indicator light 7 glows) the screen will then show the relevant pre-setting time (indicator light flashes). The time may be preset at intervals of 10 minutes up to 10 hours and one hour from 10 to 18 hours. The pre-set time remains on the screen and the display shows thedecrease in time corresponding to the manner just described until zero appears, after which the heater switches back to the default operating time. The operating time does not remain in the memory; the required time has to be set each time the heater is used.
Changing the default setting for the operating time
The factory-set, fixed operating time (4 hours), which comes into operation
when the heater is switched on can be altered within the range 2 – 8 hours. To
change the setting, do the following: while the heater is in the standby mode
(just the I/0 indicator lamp glows), turn the heater off at the switch for
just a moment (see 1.3.1), but before switching on again, hold the MENU button
(3) pressed down. First ”ECO” and after that ”0.80” will appear in the screen.
These are program version codes/symbols. When ”0.80” appears in the screen, by
pressing the [+]-button (5) the screen will change to a mode where a operating
time of 2 – 8 hours can be made the default setting (indicator lights 6 and 7
flash). For a while the screen will show the selected number of hours, e.g.
2H), after which the screen will grow dim and the control panel will remain in
the standby mode.
The newly programmed default duration of operating time will apply when the
heater is switched on on the next occasion.
Throwing Water on Heated Stones
The air in the sauna room becomes dry when warmed up. Therefore, it is necessary to throw water on the heated stones to reach a suitable level of humidity in the sauna. The humidity of the air in the sauna room is controlled by the amount of water thrown on the stones. A correct level of humidity makes the bather’s skin sweat and makes breathing easy. By throwing water on the stones with a small ladle, the bather should feel the effect of air humidity on his skin. Both too high a temperature and air humidity will give an unpleasant feeling. Staying in the hot sauna for long periods of time makes the body temperature rise, which may be dangerous.
The maximum volume of the ladle is 0.2 litres. The amount of water thrown on the stones at a time should not exceed 0.2 l, because if an excessive amount of water is poured on the stones, only part of it will evaporate and the rest may splash as boiling hot water on the bathers. Never throw water on the stones when there are people near the heater, because hot steam may burn their skin.
Sauna Water
The water to be thrown on the heated stones should meet the requirements of clean household water. The factors essentially affecting the quality of water include the following:
- humuos content (colour, taste, precipitates); recommended content less than 12 mg/litre.
- iron content (colour, smell, taste, precipitates); recommended content less than 0.2 mg/litre.
- hardness – the most important substances are manganese (Mn) and calcium (Ca); recommended content of manganese 0.05 mg/ litre, calcium less than 100 mg/litre. Calcareous water leaves a white, sticky layer on the stones and metal surfaces of the heater. Calcification of the stones deteriorates the heating properties. Ferrous water leaves a rusty layer on the surface of the heater and elements, and causes corrosion. The use of humous, chlorinated water and seawater is forbidden. Only special perfumes designed for sauna water may be used. Follow the instructions given on the package.
Temperature and Humidity of the Sauna Room
Both thermometers and hygrometers suitable for use in a sauna are available. As the effect of steam on people varies, it is impossible to give an exact, universally applicable bathing temperature or percentage of moisture. The bather’s own comfort is the best guide. The sauna room should be equipped with proper ventilation to guarantee that the air is rich in oxygen and easy to breathe. See item 2.4. ”Ventilation of the Sauna Room”. Bathing in a sauna is considered a refreshing experience and good for the health. Bathing cleans and warms your body, relaxes the muscles, soothes and alleviates oppression. As a quiet place, the sauna offers the opportunity to meditate.
Instructions for Bathing
- Begin by washing yourself; for example, by taking a shower.
- Stay in the sauna for as long as you feel comfortable.
- According to established sauna conventions, you must not disturb other bathers by speaking in a loud voice.
- Do not force other bathers from the sauna by throwing excessive amounts of water on the stones.
- Forget all your troubles and relax.
- Cool your skin down as necessary.
- If you are in good health, you can have a swim if a swimming place or pool is available.
- Wash yourself properly after bathing. Have a drink of fresh water or a soft drink to bring your fluid balance back to normal.
- Rest for a while and let your pulse go back to normal before dressing.
Warnings
- Sea air and a humid climate may corrode the metal surfaces of the heater.
- Do not hang clothes to dry in the sauna, as this may cause a risk of fire. Excessive moisture content may also cause damage to the electrical equipment.
- Keep away from the heater when it is hot. The stones and outer surface of the heater may burn your skin.
- Do not throw too much water on the stones. The evaporating water is boiling hot.
- Do not let young, handicapped or ill people bathe in the sauna on their own.
- Consult your doctor about any health-related limitations to bathing.
- Parents should keep children away from the hot heater.
- Consult your child welfare clinic about taking little babies to the sauna. age?
- temperature of the sauna?
- time spent in the warm sauna?
- Be very careful when moving in the sauna, as the platform and floors may be slippery.
- Never go to a hot sauna if you have taken alcohol, strong medicines or narcotics.
Symbols descriptions.
Troubleshooting
If the heater does not heat, check the following points:
- the electricity has been switched on.
- the control unit shows a higher figure than the temperature of the sauna.
- the fuses (1 or 2 pcs) to the heater are in good condition.
- the overheating limiter has not gone off (see figure 11).
- the timer has been switched to a section where the heater should be heated (0,5–8h).
THE SAUNA ROOM
Insulation and Wall Materials of the Sauna Room
In an electrically heated sauna, all the massive wall surfaces which store plenty of heat (such as bricks, glass blocks, plaster etc.), must be sufficiently insulated in order to keep the heater output at a reasonably low level. A wall and ceiling construction can be considered to have efficient thermal insulation if:
- the thickness of carefully fitted insulating wool inside the house is 100 mm (minimum 50 mm).
- the moisture protection consists of e.g. aluminium paper with tightly taped edges. The paper must be fitted so that the glossy side is towards the inside of the sauna.
- there is a 10 mm vent gap between the moisture protection and panel boards (recommendation).
- the inside is covered by 12–16 mm thick panelling.
- there is a vent gap of a few millimetres at the top of the wall covering at the edge of the ceiling panelling.
When aiming at a reasonable heater output, it may be advisable to lower the ceiling of the sauna (normally 2100–2300 mm, minimum height 1700 mm). As a result, the volume of the sauna is decreased, and a smaller heater output may be sufficient. The ceiling can be lowered so that the ceiling joists are fixed at a suitable height. The spaces between the joists are insulated (minimum insulation 100 mm) and surfaced as described above. Because heat goes upwards, a maximum distance of 1100–1200 mm is recommended between the bench and ceiling.
NOTE! Consult fire-extinguishing authorities to find out which part of
the fireproof wall may be insulated.
NOTE! The protection of the walls or ceiling with heat protection, such
as mineral board fitted directly on the wall or ceiling, may cause the
temperature of the wall and ceiling materials to rise dangerously high.
Blackening of the sauna walls
Wooden material in a sauna, such as panels, blackens with age. The blackening process is sped up by sunlight and the heat from the heater. If the wall surfaces have been processed with protective panel agents, the blackening of the surface of the wall above the heater can be seen quite quickly depending on the protective agent used. The blackening is due to the fact that the protective agents have less resistance to heat than unprocessed wood do. This has been proven in practical tests. The micronic mineral aggregate that crumbles from the stones on the stove may blacken the wall surface near the heater. When following the manufacturer’s approved guidelines in the installation of the sauna heater, the heater will not heat up enough to endanger the flammable material in the sauna room. The maximum temperature allowed in the wall and ceiling surfaces of the sauna room is +140 degrees Celsius. Sauna heaters equipped with CE signs meet all of the regulations for sauna installations. Proper authorities monitor that the regulations are being followed.
Sauna Room Floor
Due to a large variation in temperature, the sauna stones disintegrate in use. Small pieces of stone are washed down on the sauna room floor along with the water thrown on the stones. Hot pieces of stone may damage plastic floor coverings installed underneath and near the heater. A light-coloured joint grout, used for a tiled floor, may absorb impurities from the stones and water (e.g iron content). To prevent aesthetic damage (due to the reasons presented above) only dark joint grouts and floor coverings made of rock materials should be used underneath and near the heater.
Heater Output
When the walls and ceiling are covered with panels, and the insulation behind the panels is sufficient to prevent thermal flow into the wall materials, the heater output is defined according to the cubic volume of the sauna. See table
- If the sauna has visible uninsulated wall surfaces, such as walls covered with brick, glass block, concrete or tile, each square metre of said wall surface causes the cubic volume of the sauna to increase by 1,2 m3. The heater output is then selected according to the values given in the table. Because log walls are heated slowly, the cubic volume of a log sauna should be multiplied by 1,5, and the heater output should then be selected on the basis of this information.
Ventilation of the Sauna Room
Sufficient ventilation is extremely important for the sauna. The air in the sauna room should be changed six times per hour. The air supply pipe should be located at a minimum height of 500 mm above the heater. The pipe diameter should be about 50–100 mm. The exhaust air of the sauna room should be taken from as far from the heater as possible, but near the floor level. The crosscut area of the exhaust air vent should be twice that of the supply air pipe. Exhaust air should be led directly into the air chimney, or, by using an exhaust pipe starting near the floor level, into a vent in the upper part of the sauna. Exhaust air can also be led out through an exhaust air vent in the washing room through a 100–150 mm opening under the sauna door. For the above- mentioned system, mechanical ventilation is necessary.
- Air supply vent placing area.
- Exhaust air vent.
- Possible drying valve, which is closed during heating and bathing. The sauna can also be dried by leaving the door open after bathing.
- If there is an exhaust vent in the washing room only, there should be a minimum 100 mm opening under the sauna room door. Mechanical ventilation is recommended.
Hygienic Conditions of the Sauna Room
Good hygienic standards of the sauna room will make bathing a pleasant experience. The use of sauna seat towels is recommended to prevent sweat from flowing onto the platforms. The towels should be washed after each use. Separate towels should be provided for guests. It is advisable to vacuum or sweep the floor of the sauna room in connection with cleaning. In addition, the floor may be wiped with a damp cloth. The sauna room should be thoroughly washed at least every six months. Brush the walls, platforms and floor by using a scrubbing-brush and sauna cleanser. Wipe dust and dirt from the heater with a damp cloth.
INSTRUCTIONS FOR INSTALLATION
Prior to Installation
Prior to installing the heater, study the instructions for installation, as
well as checking the following points:
-
Is the output and type of the heater suitable for the sauna room?
The cubic volumes given in table 1 should be followed. -
Are there a sufficient number of high quality sauna stones?
-
Is the supply voltage suitable for the heater?
-
The location of the heater fulfils the minimum requirements concerning safety distances given in fig. 5 and table 1. It is absolutely necessary to ensure that the installation is carried out according to these values. Neglecting them can cause a risk of fire. Only one electrical heater may be installed in the sauna room.
Fastening the heater to the wall
Note! Connect the connecting cable to the heater before fastening the
heater to its wall rack. See the figures 8 and 10. 
The installation rack is fastened to the heater. Remove the locking screw and detach the rack from the heater.
-
Fasten the installation rack to the wall using the screws which come with the rack. Observe the minimum safety distances specified in figure 5. The installation dimensions of the rack are shown in fig. 6.
NOTE! There should be a support, e.g. plywood or a board, behind the panel, so that the fastening screws can be screwed into thicker wooden material than the panel. If there is no plywood or board behind the panel, the boards can also be fastened on the panel. Note! The heater must not be supported by just the panels! -
Lift the heater onto the rack installed on the wall so that the fastening hooks at the bottom of the rack go behind the edge of the heater body and the groove at the top of the heater is pressed on top of the rack.
-
Lock the heater to the rack using a screw at the top edge.
Safety railing
If a safety railing is built around the heater, the minimum distances given in figures 5 and 7 must be observed. The minimum distance specified in figure 7 applies below the top edge of the outer casing.
- Connection box
- Junction box
- Connection cable
Installing the thermostat sensor on the wall
The thermostat sensor is in the heater connection box. See figure 8 (A, B, C
and D). Installation of the sensor on the wall is shown in figure 14.
Installation of the Delta EE heater control panel
As the control panel has a small voltage and is splash proof, it can quite freely be installed anywhere. If the panel is installed in the sauna room, it must be at the minimum safety distance from the heater and at a maximum height of one metre. It can be mounted onto the safety railing around the heater, on the wall or even onto the fixed platform part. See figure 12. The panel can be installed in the washing or dressing room, or in the living quarters.
The panel is supplied with an installation cable of approximately 3 metres,
which can be shortened if necessary; 5-metre and 10-metre cables are available
as optional extras. Shielded cable may be used to take the panel to a distance
of more than 10 metres. The Delta EE heater control panel is delivered with
three wooden connection cable covering ledges, an installation flange, and two
screws to fix the panel at a suitable height. The conductor tubing inside the
wall structure allows you to thread the cable to the control panel hidden
within the wall – otherwise the installation would have to be on the wall
surface. See figure 12. The signals from the control panel cable are low-
current signals. The panel can, therefore, be safely installed on any base
material.
Installation instructions for the Delta EE heater control panel:
- Connect the installation cable connector to the control panel.
- The free end of the installation cable is passed from the top through the flange and set to pass through a hole made in the flange – the cable then stays between the mounting base and flange.
- The installation flange is installed in a suitable place using the two screws in the package.
- The control panel is pushed into the flange by drawing the additional cable link through the flange. The panel is locked in the installation flange by means of spring clamps on the side of the panel.
- If necessary, the installation cable can be shielded by wooden strips (3 pcs). See figure 12.
- The free end of the installation cable is connected to connector strip 1 on the heater on a colour-tocolour principle. See figures 10 B and D.
Electrical connections
The heater may only be connected to the mains in accordance with the current
regulations by an authorised, professional electrician. The heater is semi-
stationarily connected to the junction box on the sauna wall. See figure 13.
The connection cable must be of rubber cable type H07RN-F or its equivalent.
NOTE! Due to thermal embrittlement, the use of PVC-insulated wire as the connection cable of the heater is forbidden. The junction box must be splash proof, and its maximum height from the floor must not exceed 50 centimetres.
If the connection and installation cables are higher than 100 centimetres from the floor in the sauna or inside the sauna room walls, they must be able to endure a minimum temperature of 170 °C when loaded (for example, SSJ). Electrical equipment installed higher than 100 centimetres from the sauna floor must be approved for use in an ambient temperature of 125 °C (marking T125). Detailed instructions for exceptional installations are available from the local electrical authorities. The electric connections of the heater (1- and 2- phase) are shown in the figures 9 (A and B) and 10 (B and D).
Resetting the overheating limiter
The components of the sensor box monitor the functioning of the control
centre. The temperature sensor and the overheating limiter are located in the
sensor box. The temperature is sensed by an NTC thermistor, and the
overheating limiter is a fuse, which in the case of a malfunction will cut off
the heater power permanently. The fuse can be reset by pressing the reset
button, see figure 11.
Electric heater insulation resistance
When performing the final inspection of the electrical installations, a
“leakage” may be detected when measuring the heater’s insulation resistance.
The reason for this is that the insulating material of the heating resistors
has absorbed moisture from the air (storage transport). After operating the
heater for a few times, the moisture will be removed from the resistors. Do
not connect the power feed for the heater through the RCD (residual current
device)!
SPARE PARTS
1.| Heating element| | 1800W/230V| ZSN-160| D29EE (1 pc/stk), D36EE (2
pcs/stk)
---|---|---|---|---|---
2.| Heating element| | 1150W/230V| ZSN-150| D23EE (2 pcs/stk), D29EE (1
pc/stk)
3.| Thermostat/
Overheat protector
| | | ****
WX-232
| ****
D23EE, D29EE, D36EE
4.| Control panel/
Electronics unit
| | | ****
ZSME-200-1
| ****
D23EE, D29EE, D36EE
5.| Flange for wall mounting| | | ZSME-100| D23EE, D29EE, D36EE
6.| Installation cable for
the control panel
|
| | WX238| D23EE, D29EE, D36EE
7.| Power unit| | | ZSN-580| D23EE, D29EE, D36EE
8.| End of connection box| | | ZST-350| D23EE, D29EE, D36EE
We recommend to use only the manufacturer’s spare parts.