HARVIA PO11 Electric Sauna Heater Instruction Manual

HARVIA PO11 Electric Sauna Heater

Purpose of the electric heater:
The PO-heaters are designed for the heating of large 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.
• The guarantee period for heaters and control equipment used in saunas by institutions is three (3) months.

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!

CONTENTS

INSTRUCTIONS FOR USE …………………………………..3

• Piling of the Sauna Stones …………………………….3
• Maintenance ……………………………………..4
• Heating of the Sauna …………………………………..4
• Control Unit of Heater ………………………………….4
• Throwing Water on Heated Stones ………………….4
• Temperature and Humidity of the Sauna
• Room ……………………………………………………….5
• Instructions for Bathing ……………………………….5
• Warnings …………………………………………………6
• Troubleshooting …………………………………………6
• THE SAUNA ROOM ……………………………………………7
• Insulation and Wall Materials of the Sauna Room ..7
• Blackening of the Sauna Walls ………………..7
• Sauna Room Floor ………………………………………8
• Heater Output ……………………………………………8
• Ventilation of the Sauna Room ……………………….8
• Hygienic Conditions of the Sauna Room ……………9
• INSTRUCTIONS FOR INSTALLATION …………………….10
• Before Installation …………………………………….10
• Place and Safety Distances of the Heater ………..11
• Electrical Connections ………………………………..11
• Installation of Control Unit and Sensor …….12
• Electric Heater Insulation Resistance ……….12
• Installing the Heater ………………………………….12

SPARE PARTS ………………………………………………..13

INSTRUCTIONS FOR USE

Piling of the Sauna Stones
You will need ca 220 kgs of stones (diameter 10–15 cm). Wash off dust from the stones before pil-ing them into the heater. The piling of the stones is illustrated in figure 1.

• Cover the heater body with stones completely. Use stones that fit easily between the heater body and the steel frame.
• Place stones with suitable shape between and around the heating elements. Do not wedge stones between the heating elements. Pile the stones so that they support each other instead of lying their weight on the heating elements. Place large stones against the steel frame. Cover the heating elements with stones com-pletely. A bare heating element can endanger combustible materials even outside the safety distances.
• Fill the upper part of the steel frame with stones. Place the stones loosely so that air can flow between them. Do not form a high pile of stones on top of the steel frame.

Figure 1. Piling of the sauna stones

Note

• Use solely angular split-face sauna stones that are intended for use in a heater. Peridotite, oliv-ine-dolerite and olivine are suitable stone types.
• Neither light, porous ceramic stones nor soft potstones should be used in the heater. They do not absorb enough heat when warmed up. This can result in damage in heating elements.
• Rounded stones should not be used in the heat-er. They tend to pile too tightly and block the air flow in the heater.
• The guarantee does not cover any faults caused by the use of stones not recommended by the manufacturer.
• 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.

Maintenance

Due to large variation in temperature, the sauna stones disintegrate in 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, remove any pieces of stones from the bottom of the heater and replace any disintegrated stones with new ones.
The guarantee does not cover any faults caused by disintegrated or too small stones blocking the air flow in the heater.

Heating of the Sauna

• Before switching the heater on always check that there isn’t anything on top of the heater or inside the given safety distance. See item 1.6. “Warnings”.
• When the heater is switched on for the first time, both the heater and the stones emit smell. To re-move the smell, the sauna room needs to be effi-ciently ventilated.
• The purpose of the heater is to raise the tempera-ture 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 and wall ma-terials of the Sauna Room”. A suitable temperature for the sauna room is about +65 °C – +80 °C.

The sauna stones normally reach the required bath-ing 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 ca-pacity should be carefully chosen to suit the size of the sauna room. See item 2.3. ”Heater Output”.

Control Unit of Heater
The PO heaters require a separate control unit to operate the heater. The heaters can be controlled with the following control units:

• Harvia C150
• Harvia C150VKK
• Harvia C260
• Harvia Fenix
• Harvia Griffin

See the instructions for use of the selected control unit model.

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 con-

Water property Wassereigenschaft

Humus concentration Humusgehalt
Iron concentration Eisengehalt
Hardness: most important substances are manganese (Mn) and lime, i.e. calcium (Ca). Wasserhärte: Die wichtigsten Stoffe sind Mangan (Mn) und Kalk, d.h. Kalzium (Ca).
Chlorinated water Gechlortes Wasser
Seawater Salzwasser

Table 1: Water quality requirements Anforderungen an die Wasserqualität trolled 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 un-pleasant feeling. See item 1.6. “Warnings”.

You can adjust the nature of the heat from soft to sharp by throwing water either to the side of the heater or straight on top of the stone pillar.
The water to be thrown on the heated stones should meet the requirements of clean household water (table 1).
Only special aromas 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 per-centage 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 expe-rience 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 com-fortable.
• 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

• 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. 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.
• Keep away from the heater when it is hot. The stones and outer surface of the heater may burn your skin.
• 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 alco-hol, strong medicines or narcotics.
• 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 electri-cal equipment.

Troubleshooting

If the heater does not heat, check the following points:

• the current from the control unit to the heater has been switched on
• the thermostat shows a higher figure than the temperature of the sauna.
• the fuses to the heater are in good condition.

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 insu-lated in order to keep the heater output at a reason-ably 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. alu-minium 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 (recommenda-tion).
  the inside is covered by 12“16 mm thick panel-ling.

• • there is a vent gap of a few millimetres at the top of the wall covering at the edge of the ceil-ing panelling.
  When aiming at a reasonable heater output, it may be advisable to lower the ceiling of the sauna. 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. Protecting 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, black-ens 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 depend-ing 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 heater 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 flam- mable 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
Hot pieces of stone can damage floor coverings and cause a risk of fire. The floor coverings of the instal-lation place should be heat-resistant.
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 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 vol-ume of the sauna. See table 2.
If the sauna has visible uninsulated wall surfaces, such as walls covered with brick, glass block, con-crete 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 locat-ed 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 ven-tilation is necessary.

If the heater is mounted in a ready-made sauna, the instructions of the sauna manufacturer should be followed when arranging ventilation.

The series of pictures shows examples of ventila-tion systems for a sauna room. See fig. 2.
Hygienic Conditions of the Sauna Room 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.

Mechanical ventilation
Maschinelle Ventilatio

1. Air supply vent placing area.
2. Exhaust air vent.
3. Possible drying valve, which is closed during heating and bathing. The sauna can also be dried by leaving the door open after bathing.
4. 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.n

Figure 2. Ventilation of the sauna room

INSTRUCTIONS FOR INSTALLATION

Before Installation
Before installing the heater, study the instructions for installation. Check the following points:

• Is the output and type of the heater suitable for the sauna room? The cubic volumes given in table 2 should be followed.
• The location is suitable for the heater (see item 3.2. “Place and Safety Distances of the Heater”).
• Is the supply voltage suitable for the heater?
• Are there a sufficient number of high quality sauna stones?

Note! Only one electrical heater may be installed in the sauna room.

Heater Ofen| Output Leistung| Sauna room Saunakabine| Cables (400 V 3N~) Kabel (400 V 3N~)| Fuse Sicherung
---|---|---|---|---
Cubic vol. Rauminhalt| Height Höhe| To control Zum Steuergerät| To junction box Zur Klemmdose| To heater Zum Ofen| To sensor Zum Fühler
Diameter/ Durchmesser 600 mm Height/Höhe 830 mm Weight/Gewicht 28 kg Stones/Steine 220 kg| ****

kW

| See item 2.3.

Siehe Kap. 2.3.

| ****

min. mm

| ML/MK/MMJ

Figure 3: A

Abb. 3: A

mm2

| ML/MK/MMJ

Figure 3: B

Abb. 3: B

mm2

| HO7RN-F

Figure 3: C

Abb. 3: C

mm2

| SSJ

Figure 3: D

Abb. 3: D

mm2

| ****

A

min. m3

| ****

max. m3

PO11| 11,0| 9| 24| 2000| 5 x 2,5| 5 x 2,5| 5 x 2,5| 4 x 0,25| 3 x 16
PO165| 16,5| 16| 35| 2100| 5 x 6,0| 5 x 6,0| 5 x 2,5| 4 x 0,25| 3 x 25

Place and Safety Distances of the Heater
The minimum safety distances are described in fig-ure 4. It is absolutely necessary to install the heater according to these values. Neglecting them causes a risk of fire.

Components shown in figure 4:

• Sensor (installed on ceiling)
• Sensor (installed on wall)
• Bench or safety railing.
• Floor. Hot pieces of stone can damage floor coverings and cause a risk of fire. The floor coverings of the installation place should be heat-resistant.
• The heater should be installed so that the warning texts on the cover of the junction box can be read without difficulty after the installation.

Electrical Connections
The heater may only be connected to the electrical network in accordance with the current regulations by an authorised, professional electrician.

• The heater is semi-stationarily connected to the junction box (figure 3: E) on the sauna wall. The junction box must be splash-proof, and its maximum height from the floor must not exceed 500 mm.
• The connection cable (figure 3: C) must be of rubber cable type H07RN-F or its equivalent.

Figure 4. The heater’s safety distances

NOTE Due to thermal embrittlement, the use of PVC-insulated wire as the connection cable of the heater is forbidden.

• If the connection and installation cables are higher than 1000 mm from the floor in the sau-na or inside the sauna room walls, they must be able to endure a minimum temperature of 170 °C when loaded (for example, SSJ).
• Elec-trical equipment installed higher than 1000 mm from the sauna floor must be approved for use in a temperature of 125 °C (marking T125).
• The wiring diagrams are included in the control unit installation instruction.
• Further instructions concerning exceptional installations can be obtained from local electri-cal authorities.

Installation of Control Unit and Sensor: Detailed instructions for the installation of both the unit and the sensor are delivered with the control unit.

Electric Heater Insulation Resistance

• When performing the final inspection of the electrical installations, may be detected when meas-uring 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)!

Installing the Heater
See figure 7.

1. Connect the connection cable to the heater (see item 3.3. “Electrical Connections”).
2. Place the heater body. Adjust the body verti-cally straight with the adjustable legs.
3. Place the steel frame. Adjust the frame verti-cally straight with the adjustable legs.

Figure 7. Installing the heater
Abbildung 7. Installieren des Saunaofens

SPARE PARTS

Harvia Oy PL12
40951 Muurame Finland
www.harvia.fi

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