HARVIA MD135GR Electric Sauna Heater Instruction Manual

HARVIA MD135GR Electric Sauna Heater

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. Please read the instructions for use carefully before using the heater. The heater is designed for the heating of a sauna room to bathing temperature. It is not to be used for any other purpose.
Congratulations on your choice!

Guarantee:

• 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.
• The guarantee does not cover any faults resulting from failure to comply with installation, use or maintenance instructions.
• The guarantee does not cover any faults resulting from the use of stones not recommended by the heater manufacturer.

PROCEDURE

1. Electrical connections
2. Testing
3. Installing the heater
4. Piling of the sauna stones

INSTRUCTIONS FOR USE

Piling of the Sauna Stones
The piling of the sauna stones has a great effect on the functioning of the heater (figure 1).

Important information on sauna stones:

• You will need:
  • ca 20 kgs of small stones (diameter 5–10 cm)
  • ca 140 kgs of large stones (diameter 10–15 cm)
• Use solely angular split-face sauna stones that are intended for use in a heater. Peridotite, olivine-dolerite and olivine are suitable stone types.
• Neither light, porous ceramic “stones“ nor soft soapstones should be used in the heater. They do not absorb enough heat when warmed up. This can result in damage in heating elements.
• Wash off dust from the stones before piling them into the heater.

Please note when placing the stones:

• Do not drop stones into the heater.
• Pile stones so that the edges of stones do not come through the gaps of the heating element cage.
• Place the stones as dense as possible.
• Do not block the heater’s air intakes with stones.
• Do not form a high pile of stones on top of the heater.
• 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.

A bare heating element can endanger com-bustible materials even outside the safety dis-tances. Check that no heating elements can be seen behind the stones. Do not move the heater after stones have been piled.

Maintenance
Due to large variation in temperature, the sauna stones disintegrate in use. Rearrange the stones 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. By doing this, the heating capability of the heater stays optimal and the risk of overheating is avoided.

Heating of the Sauna
When operating the heater for the first time, both the heater and the stones emit smell. To remove the smell, the sauna room needs to be efficiently ventilated.
If the heater output is suitable for the sauna room, it will take about an hour for a properly insulated sauna to reach the required bathing temperature ( 2.3.). The sauna stones normally reach the bathing temperature at the same time as the sauna room. A suitable temperature for the sauna room is about 65–80 °C.
Before switching the heater on always check that there isn’t anything on top of the heater or inside the given safety distance. 1.4.

Using the Heater
Heater is controlled from a separate control unit. 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 effect of heat and steam on people varies – by experimenting, you can find the levels of temperature and humidity that suit you best.

Water property

Humus concentration
Iron concentration
Hardness: most important substances are manganese (Mn) and lime, i.e. calcium (Ca)
Chlorinated water
Seawater

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.
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.

Instructions for Bathing

• Begin by washing yourself.
• Stay in the sauna for as long as you feel comfortable.
• Forget all your troubles and relax.
• 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.
• 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 after bathing.
• Rest for a while and let your pulse go back to normal. Have a drink of fresh water or a soft drink to bring your fluid balance back to normal.

Warnings

• Staying in the hot sauna for long periods of time makes the body temperature rise, which may be dangerous.
• Keep away from the heater when it is hot. The stones and outer surface of the heater may burn your skin.
• Keep children away from the heater.
• 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.
• Consult your child welfare clinic about taking little babies to the 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.
• Never sleep in a hot sauna.
• 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.

Troubleshooting

All service operations must be done by professional maintenance personnel.

The heater does not heat.

• Check that the fuses to the heater are in good condition.
• Check that the connection cable is connected.
• Check that the control panel shows a higher figure than the temperature of the sauna.
• Check that the overheat protector has not gone off.

The sauna room heats slowly. The water thrown on the sauna stones cools down the stones quickly.

• Check that the fuses to the heater are in good condition.
• Check that all heating elements glow when the heater is on.
• Turn the temperature to a higher setting.
• Check that the heater output is sufficient ( 2.3.).
• Check that the sauna room ventilation has been arranged correctly ( 2.2.).

The sauna room heats quickly, but the temperature of the stones remain insufficient. Water thrown on the stones runs through.

• Turn the temperature to a lower setting.
• Check that the heater output is not too high ( 2.3.).
• Check that the sauna room ventilation has been arranged correctly ( 2.2.).

Panel or other material near the heater blackens quickly.

• Check that the requirements for safety distances are fulfilled ( 3.1.).
• Check that no heating elements can be seen behind the stones. If heating elements can be seen, rearrange the stones so that the heating elements are covered completely ( 1.1.).
• Also see section 2.1.1.

The heater emits smell.

• See section 1.2.
• The hot heater may emphasize odours mixed in the air that are not, however, caused by the sauna or the heater. Examples: paint, glue, oil, seasoning.

The heater makes noise.

• Occasional bangs are most likely caused by stones cracking due to heat.
• The thermal expansion of heater parts can cause noises when the heater warms up.

SAUNA ROOM

Sauna Room Structure

A. Insulation wool, thickness 50–100 mm. The sauna room must be insulated carefully so that the heater output can be kept moderately low.
B. Moisture protection, e. g. aluminium paper Place the glossy side of the paper towards the sauna. Tape the seams with aluminium tape.
C. Vent gap of about 10 mm between the moisture protection and panel (recommendation).
D. Low mass 12– 16 mm thick panel board. Before starting the panelling, check the electric wiring and the reinforcements in the walls required by the heater and benches.
E. Vent gap of about 3 mm between the wall and ceiling panel.
F. The height of the sauna is usually 2100–2300 mm. The minimum height depends on the heater (see table 2). The space between the upper bench and ceiling should not exceed 1200 mm.
G. Use floor coverings made of ceramic materials and dark joint grouts. Particles disintegrating from the sauna stones and impurities in the sauna water may stain and/or damage sensitive floor coverings.
NOTE! Check from the fire authorities which parts of the firewall can be insulated. Flues which are in use must not be insulated.
NOTE! Light protective covers which are installed directly to the wall or ceiling may be a fire risk.
NOTE! Make sure that the water dripping onto the sauna floor enters the floor drain.

Blackening of the Sauna Walls
It is perfectly normal for the wooden surfaces of the sauna room to blacken in time. The blackening may be accelerated by

• sunlight
• heat from the heater
• protective agents on the walls (protective agents have a poor heat resistance level)
• fine particles disintegrating from the sauna stones which rise with the air flow.

Sauna Room Ventilation
The air in the sauna room should change six times per hour. Figure 3 illustrates different sauna room ventilation options.

A. Supply air vent location. If mechanical exhaust ventilation is used, place the supply air vent above the heater. If gravity exhaust ventilation is used, place the supply air vent below or next to the heater. The diameter of the supply air pipe must be 50–100 mm. Do not place the supply air vent so that the air flow cools the temperature sensor (see the temperature sensor installation instructions in the control unit installation instructions)!
B. Exhaust air vent. Place the exhaust air vent near the floor, as far away from the heater as possible. The diameter of the exhaust air pipe should be twice the diameter of the supply air pipe.
C. Optional vent for drying (closed during heating and bathing). The sauna can also be dried by leaving the door open after bathing.
D. If the exhaust air vent is in the washroom, the gap underneath the sauna door must be at least 100 mm. Mechanical exhaust ventilation is mandatory.

Heater Output
When the walls and ceiling are covered with panels and insulation behind the panels is adequate, the heater output is defined according to the volume of the sauna. Non insulated walls (brick, glass block, glass, concrete, tile, etc.) increase the need for heater output. Add 1,2 m³ to the volume of the sauna for each non-insulated wall square meter. For example, a 10 m³ sauna room with a glass door equals the output requirement of about a 12 m³ sauna room. If the sauna room has log walls, multiply the sauna’s volume by 1,5. Choose the correct heater output from Table 2.

Sauna Room Hygiene
Bench towels should be used during bathing to prevent sweat from getting onto the benches. The benches, walls and floor of the sauna should be washed thoroughly at least every six months. Use a scrubbing brush and sauna detergent. Wipe dust and dirt from the heater with a damp cloth. Remove lime stains from the heater using a 10% citric acid solution and rinse.

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.
• Is the supply voltage suitable for the heater?
• The location of the heater fulfils the minimum requirements concerning safety distances given in fig. 4 and table 2.
  Note! Only one electrical heater may be installed in the sauna room. The heater should be installed so that the warning texts can also be read without dif-ficulty after the installation.

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

Safety Railing
If a safety railing is built around the heater, the minimum distances given in fig. 4 or in the railing’s instructions for installation must be observed.

Heater Ofen| Output Leistung| Dimensions Abmessungen| Stones Steine| Sauna room Saunakabine
---|---|---|---|---
Width/Depth/Height Breite/Tiefe/Höhe| Weight/ Gewicht| Cubic vol. Rauminhalt| Height Höhe
 |

kW

|

mm

|

kg

|

max. kg

| 2.3.!|

min. mm

min. m³| max. m³
MD135/MD135G/MD135GR/ MD135GL/MD135H| 13,6| 550/550/806| 47| 160| 11| 20| 2100
MD160/MD160G/MD160GR/ MD160GL/MD160H| 15,8| 550/550/806| 47| 160| 15| 25| 2100
MD180/MD180G/MD180GR/ MD180GL/MD180H| 18,0| 550/550/806| 47| 160| 20| 28| 2100

Installation of the Control Unit and Sensor

• The control unit includes detailed instructions for fastening the unit on the wall.
• MDG: Use the sensor which comes with the heater (135 °C).
• Install the sensor as shown in figure 5. If the heater is installed further than 150 mm from wall, the sensor must be installed on the ceiling.
• If you install heater model MDGR/MDGL/MDH grid side facing the wall, please contact manufacturer.
• Do not place the supply air vent so that the air flow cools the temperature sensor. Figure 3.

Suitable control units MD135–MD160/G/GR/GL/H:

• Harvia Griffin CG170
• Harvia Xenio CX170
• Harvia C90+LTY17
• Harvia C150VKK
• Harvia 260

MD180/G/GR/GL/H:

• Harvia Griffin CG170+LTY17
• Harvia Xenio CX170+LTY17
• Harvia 260

See the latest control unit models in our website www.harviasauna.com.

Electrical Connections
The heater may only be connected to the electrical network in accordance with the cur-rent regulations by an authorized, professional electrician.

• The heater is semi-stationarity connected to the junction box (figure 6:C) on the sauna wall. The junction box must be splash-proof, and its maximum height from the floor must not exceed 500 mm.
• The connecting cable (figure 6:B) must be of rubber cable type H07RN-F or its equivalent. NOTE! Due to thermal embrittlement, the use of PVC-insulated wire as the connecting cable of the heater is forbidden. The connecting cable has to be at least 3 m long to be able to lift the heating element module out of the heater from above.
• If the connecting and installation cables are higher than 1000 mm 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 1000 mm from the sauna floor must be approved for use in a temperature of 125 °C (marking T125).

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 elements has absorbed moisture from the air (storage, transport). After operating the heater for a few times, the moisture will be removed from the heating elements. Do not connect the power feed for the heater through the RCD (residual current device)!

Installing the Heater See figure 6.

1. Lead the cable from bottom of the heater through the heating element cage to the heating element module. Connect cables to the heating element module ( 3.5.).
2. Put the heating element module into its place. Check that the cable won’t get stuck between the heating element module and the heater body. Place the cover of the heating element cage in its place.
3. Place the heater and adjust the heater vertically straight using the adjustable legs.

Replacing the Heating Element Module/Heating Elements
See figure 7.
When placing the heating element module back into the heater, check that the cable won’t get stuck between the heating element module and the heater body. Please notice also to put the cover of the heating element cage in its place supporting the heating elements and pile stones back on the heater.

SPARE PARTS

1| Heating element| 2260 W /230 V

2260 Вт/230 В

| ZCU-823| 13,5 kW

16 kW

| 6

3 (B, D, F)

---|---|---|---|---|---
2| Heating element| 3000 W /230 V

3000 Вт/230 В

| ZCU-830| 16 kW

18 kW

| 3 (A, C, E)

6

3| Heating element module|  | ZLE-005| 13,5 kW| 1
4| Heating element module|  | ZLE-006| 16 kW| 1
5| Heating element module|  | ZLE-007| 18 kW| 1

We recommend to use only the manufacturer’s spare parts.

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