SAWOTEC NRNF Series Nordex Floor Heater Instruction Manual

SAWOTEC NRNF Series Nordex Floor Heater

Specifications

• Model Numbers: NRNF-90NS, NRNF-105NS, NRNF-120NS, NRNF-90NS-BL, NRNF-105NS-BL, NRNF-120NS-BL, NRNF-150NS, NRNF-180NS, NRNF-150NS-BL, NRNF-180NS-BL, NRNF-180NS-V12, NRNF-210NS-V12, NRNF-240NS-V12, NRNF-180NS-BL-V12, NRNF-210NS-BL-V12, NRNF-240NS-BL-V12
• Power Output: 9.0 kW, 10.5 kW, 12.0 kW, 15.0 kW, 18.0 kW, 21.0 kW, 24.0 kW
• Type: Electric Sauna Heater
• Languages: Deutsch, English

Product Usage Instructions

Safety Instructions
Before using the sauna heater, carefully read the manual to ensure safe operation. Avoid covering the heater to prevent fire hazards.

Heater Installation
The heater can be placed anywhere in the sauna but follow these guidelines for safety:

• Ensure minimum safety distances as provided in the manual.
• Follow the cubic volumes specified in the Technical Data.
• Do not install the heater directly on the floor or in a wall niche.
• Only install one heater per sauna room unless following special instructions for twin-heater installations.
• Ensure the heater is securely fixed to the floor to prevent accidental movement.
• Consider using a heater guard to prevent accidental contact with the hot heater surface.

Congratulations on your purchase of the SAWOTEC sauna heater! Please read the manual carefully before using the heater.

ELECTRIC SAUNA HEATER: Not for use in the USA, Canada and Mexico.

NOTE!
Warranty is not covering damages that are caused by installing, using or maintaining contrary guidelines in this manual. Contact for your retailer in warranty questions.

SAFETY INSTRUCTIONS

Please take note of these safety precautions before using the sauna or when installing the heater.

For user:

• This product is not designed to be used by persons (including children) with limited physical or mental abilities and limited experience and knowledge except under close supervision by a responsible person with knowledge and experience or having been advised by such person.
• Cleaning and user maintenance shall not be made by children without supervision.
• Under no circumstances should children be allowed to play with the device.
• Do not use the heater as a grill.
• Do not put wood of any kind on the electric heater.
• Do not cover the heater. It may cause a fire.
• Do not use the heater as clothes dryer. It may cause fire.
• Never sit on the heater. It is really hot and can cause serious burns.
• Do not use chlorinated water (e.g) . From the swimming pool or jacuzzi) or seawater. It can destroy the heater.
• Do not use any flammable liquids or oils on the heater as it might cause fire and damage to the heating elements.
• When installing a new heater, switch the heater on for 30mins. Do not stay inside the sauna room while performing the operation. See page 17
• Make sure that no flammable objects have been placed on the heater before activating the preset time function or the stand-by mode for the remote operation.

For technicians:

• Wiring and repairs must be done by a certified electrician.
• Follow the Minimum Safety Distances when mounting the heater (See page 9).
• The electronic sensor and electronic heating system should be mounted in a way so that incoming air will not interfere with it. If using separate controls, the control unit and control panel must be mounted outside the sauna cabin.
• If this sauna heater is used for public saunas or saunas that may be switched on by a separate remote-control system, the door of the sauna room must be fitted with an interlock such that the stand-by mode setting for remote operation is disabled if the sauna door is opened when the stand-by mode setting for remote operation is set.
• Observe the specifications on volumes of the sauna cabin (See page 22).
• Observe the specifications on ventilation of the sauna cabin (See page 17).

OFEN INSTALLATION

NOTE!
Please refer to the control unit manual for maximum power rating. Check control’s maximum capacity if additional contactor unit is needed.

HEATER INSTALLATION

The heater can be placed wherever in the sauna, but for safety and convenience, follow the minimum safety distances as provided below (See page 9). Follow the cubic volumes given in the Technical Data (See page 22). Do not install the heater to the floor or wall niche. Do not install more than one heater in a sauna room unless you follow the special instructions for twin- heater installations. In most countries, there is a law that requires heaters to be screwed to the floor. The heater gets very hot. To avoid the risk of accidental contact with the heater, it is recommended that a heater guard be provided. The cable used for sauna wiring must be HO7RN-F type or its equivalent. A certified electrician must do the installation of the heater to ensure safety and reliability. Improper electrical connection can cause electric shock or fire. Refer to the electrical diagram (See page 10)

ELECTRICAL DIAGRAM

NORDEX FLOOR STANDING

NOTE!
By cables longer than 2m, you have to assign the cable cross section to VDE 0100 respective to EVU.

MODEL

| TERMINAL 1

(kW)

| TERMINAL 2

(kW)

| TERMINALS 1 & 2

(JUMPER)

---|---|---|---
NRNF-90NS NRNF-90NS-BL| 9| |
NRNF-105NS NRNF-105NS-BL| 6| 4.5| 10.5
NRNF-120NS NRNF-120NS-BL| 6| 6| 12
NRNF-150NS NRNF-150NS-BL| 9| 6| 15
NRNF-180NS NRNF-180NS-BL| 6| 12|
NRNF-180NS-V12 NRNF-180NS-BL-V12| 9| 9|
NRNF-210NS-V12 NRNF-210NS-BL-V12| 9| 12|
NRNF-240NS-V12 NRNF-240NS-BL-V12| 12| 12|

Control and Contactor Specification

NOTE! For more details please see your control unit or contactor unit manual.

NORDEX V12

HEATER STONES

The main purpose of the stones in the heater unit is to store enough energy to efficiently vaporize the water thrown on top of the stones to maintain correct humidity in the sauna room. The stones must be removed at least once a year or every 500 hours which ever occurs first. All stone crumbles must be removed from the heater unit and replaced with new ones as described in the heater manual. When placing the stones, recommended to use cut resistant gloves. The required amount of stones is listed in the manual provided (See page 22 Technical Data).

NOTE! Never use the heater without stones as it may cause fire. Use only manufacturer recommended SaWo-stones. Using unsuitable stones may lead to heating element damage and will void the warranty. Never use eramic stones or other artificial stones of any type!

LOADING STONES INTO THE HEATER
It is recommended that all stones should be rinsed to remove any stains or dust that can cause unpleasant odor during the first few times of using the heater. It is important that the stones are loaded carefully in a way that they do not block air circulation through the heater. Load the stones to the heater so that the heating elements are not visible from any angle. Larger stones that won’t fit between the heating elements must not be forced in place instead they must be completely removed. Small crumble or stone pieces smaller than 35mm in diameter must not be loaded into the heater because they will block the air circulation and will cause overheating and possible heating element damage. Load the stones to the heater so that the heating elements are not visible from any angle. If heating elements touch each others, it will significantly reduce the life span of heating element.

NOTE! Heating element damage due to overheating caused by wrong kind of stones or stones which were wrongly loaded into the heater is not covered by the factory warranty.

Before the heater is filled with stones, electrician should test that the heater works. Testing can be done by turning on the heater for a short time without any stones and verifying that all heating elements are heating up.

HEATING OF THE SAUNA ROOM

CAUTION!
Smoke and odor form when heating up for the first time. Work materials from the manufacturing process will be present on the new heating elements.

These evaporate when the sauna heater is heated up for the first time. This produces smoke and an unpleasant odor. Breathing in the fumes or smoke can be harmful to your health. Perform the following steps when operating the sauna heater for the first time and if the heating elements for the sauna heater have been changed. In this way you will prevent damage to health due to the fumes and smoke produced when heating up for the first time.

1. Select the highest possible temperature in the sauna control.
2. Heat up the sauna heater for half an hour. Do NOT stay in the sauna cabin during this period.
3. Allow the sauna cabin to ventilate thoroughly after heating up for the first time.
4. If no smoke or odor is produced the next time the sauna heater is heated up, you can start to use the sauna. If smoke or odor is produced again, leave the sauna cabin immediately and repeat the initial heating up process followed by ventilation.

Always check the sauna room before switching sauna heater on (to be sure that there is no combustible things within the safety distances of the heater or on the heater). Make sure that sauna room has been efficiently ventilated. If the output of the heater is proper it will take about an hour to reach suitable temperature (See page 22). The temperature in sauna room should be between +60 – +90 °C. Temperature is individual in every sauna room depending on e.g. heater model, size of heater room, air ventilation and bathers preference. Too powerful heater will heat sauna room too quickly and the stones won’t have enough time to warm. The water poured on the stones will not evaporate, but flow into the stone holder. An underpowered heater, on the other hand, would lead to an undesirably long heating period.

AIR VENTILATION

• To have a soothing sauna, there should be a proper mixing of hot and cold air inside the sauna room. Another reason for ventilation is to draw air around the heater and move the heat to the farthest part of the sauna. The positioning of the inlet and outlet vents may vary depending on the design of the sauna room or preference of the owner.
• The inlet vent may be installed on the wall directly below the heater (Fig. A). When using the mechanical ventilation, the inlet vent may be placed at least 60cm above the heater (Fig B) or on the ceiling above the heater (Fig. C). Through these positions, the heavy cold air that is blown into the sauna is mixed with the light hot air from the heater, bringing fresh air for the bathers to breathe. The inlet and the outlet vent must have a diameter of 10cm.
• The outlet vent should be placed diagonally opposite to the inlet. It is recommended that the outlet vent be placed under the platform in a sauna as far as possible from the fresh air vent. It may be installed near the floor, or led outside through a pipe from the floor going to a vent to the sauna ceiling, or under the door (to the washroom). In this case, the sill slot must be at least 5cm and it is recommended that there is mechanical ventilation in the washroom. The size of the exhaust should be twice that of the inlet.

INSULATION

The sauna must have proper insulation on the walls, ceiling and door. One square meter (m²) of uninsulated surface increases the cubic volume by approximately 1,2m³ when determining the power requirement of the heater. See page 22 (Technical Data). Ensure that moisture proofing is appropriate in the sauna room. The purpose of this is to prevent spreading of moisture to the other rooms or wall structure. Moisture proofing must be placed between heating insulation and panel.

Thermal and moisture proofing need to be installed according to the following order from outside to inside:

• The recommended minimum thickness of the thermal insulation in the walls is 50 mm and in the ceiling 100 mm.
• It is possible to use carton or aluminum foil laminate as a vapor barrier, which is affixed over the insulation aluminum foil inwards.
• Leave at least 20 mm air slot between vapor barrier and inside.
• To prevent gathering of the moisture behind the panel, leave the slot between wall panel and ceiling.

SAUNA MAINTENANCE

AFTER EVERY SAUNA SESSION:

• It is recommended to use bench towels during sauna session to prevent sauna benches getting dirty.
• After sauna session, leave heater on for 30 minutes so sauna will dry faster. After that, open air vents or sauna door.
• Empty pail from water.

AT LEAST 1 -4 TIMES PER YEAR:

• Remove heater stones. Clean stone dust and crumbs from bottom of the heater. Repile stones and replace disintegrated ones.
• Check heating elements. If there is any cracks or elements are bent, replace all elements. Do not replace only one.
• Wash sauna surfaces with warm water and multi-purpose detergent. Use soft brush. Wash sauna benches, ceiling, floor and walls. Do not use detergent which includes ammonia or chlorine. Rinse surfaces with cold water and ventilate sauna room well. If needed, protect wood surfaces with wood treatment oil. Read carefully the instructions of wood treatment oil from product packaging.
• If sauna benches are not getting clean after washing, sand the benches with sandpaper. Protect benches with wood oil. Do not heat the sauna room straight after treatment.
• If there is calcium stains or other dirt on the heater cover, clean it with mild soap water. You can also use SAWO Decalcifying solution for washing the stains. Dry after wash.
• Clean glass surfaces with window cleaning agent or dish soap. Rinse well and dry with a squeegee or a dry cloth.
• Check screws (door, sauna benches, railings). Tighten up if necessary.
• Clean the floor drain.

DIAGNOSTIC TABLE

If heater is not heating up or sauna room is heating up slowly:

• NS- AND NI-MODELS:
  • Is the control unit ON?
  • Is the set temperature higher than the temperature inside the sauna room?
  • Is the main switch ON? In Ni-models, main switch is located at the bottom of the heater, and in NS-models it is on the power control.
  • Are the switchboard fuses ON and unbroken? If broken, find out the reason before turning ON your heater.
  • Are all heating elements glowing red when the heater is ON?
  • Is the heater’s heating power enough for the sauna room? (See page 22)
  • Are the sauna stones laid properly? Is there enough space for air circulation and stones are in good condition? ? If stones are laid loosely, sauna will warm up faster.
  • Is the air circulation enough in the sauna room? (See page 17)
• IF THE SURFACES DARKEN AROUND THE HEATER:
  • Is the heater installed following the safety distances? (See page 9)
  • Have you laid the sauna stones correctly and there is enough space between the stones for air circulation? If air circulation is blocked constructions around the heater might over heat.
  • Are the heating elements visible behind the stones? Rearrange stones if necessary.
  • If you cannot find the reason, contact your retailer.

TECHNICAL DATA

OFEN-                   HEIZELEMENT                  VERSORGUNGS- GRÖSSE DES OFENS                GRÖSSE

MODELL                           TYP     SAUNAKABINE SPANNUNG  BREITE TIEFE HÖHE          DES KABELS            STEINE  STEUERUNG              SICHERUNG

HEATER                         HEATING ELEMENTS  SAUNA           SUPPLY SIZE OF HEATER               SIZE OF WIRE         STONES CONTROL FUSE

ROOM                            LENGTH WIDTH HEIGHT

MODEL                kW          kW  TYPE NUMBER              mm³ VOLTAGE                mm                                     mm² kg                                           (amp.)

NRNF-90NS NRNF-90NS-BL| 9,0 kW| 6|  | 1.5 kW| SAV150| 8| 400V 3N~| 450| 400| 670| 6

5×2.5

| 45kg| separat

separate

| ****

3 x16

NRNF-105NS NRNF-105NS-BL

NRNF-120NS NRNF-120NS-BL

| 10,5 kW

12,0 kW

| 3

3

3

3

|  | 2.0 kW

1.5 kW

2.0 kW

2.0 kW

| SAV200 SAV150

SAV200

SAV200

| 9

10

| 400V 3N~

400V 3N~

| 450

450

| 400

400

| 670

670

| 3

5×1.5

5×1.5

| 3

5×1.5

5×1.5

| 6

5×2.5

5×4.0

| 45kg

45kg

| separat separate separat

separate

| 3 x10 3 x10 3 x 16

3 x 10 3 x 10 3 x 20

NRNF-150NS NRNF-150NS-BL

NRNF-180NS NRNF-180NS-BL

| ****

15,0 kW

18,0 kW

| ****

6

3

3

6

|  | ****

1.5 kW

2.0 kW

2.0 kW

2.0 kW

| ****

SAV150 SAV200

SAV200 SAV200

| ****

13

17

| ****

400V 3N~

400V 3N~

| ****

595

595

| ****

400

400

| ****

670

670

| 6

5×2.5

3

| 3

5×1.5

6

| 9

5×4.0

| 55kg 55kg| separat separate separat separate| ****

3 x 16 3 x 10 3 x 25

3 x 10 3 x 20

5×1.5| 5×4.0|
NRNF-180NS-V12 NRNF-180NS-BL-V12

NRNF-210NS-V12 NRNF-210NS-BL-V12

NRNF-240NS-V12 NRNF-240NS-BL-V12

| 18,0 kW

21,0 kW

24,0 kW

| 6

6

6

6

6

6

|  | 1.5 kW

1.5 kW

1.5kW

2.0kW

2.0 kW

2.0 kW

| ****

SAV150 SAV150

SAV150 SAV200

SAV200

| 18

22

26

| 400V 3N~

400V 3N~

400V 3N~

| ****

740

740

740

| ****

400

400

400

| ****

670

670

670

| 6

5×2.5

5×2.5

3

| 6

5×2.5

5×4.0

|  | 75kg 75kg

75kg

| separat separate separat separate separat

separate

| 3 x 16 3 x 16

3 x 16 3 x 20

3 x 20 3 x 20

5×4.0| 5×4.0|

Heater Spare Parts

1. Heating Element
2. Terminal Block
3. Heating Element Holder with o-rings
4. Cable Holder
5. Name Plate (Large)
6. Floor Mounting Bracket
7. SAV 90 Wire set
8. SAV 105-120 Wire set
9. SSAV 150 Wire set
10. SSAV 180 Wire set
11. SSAV 180-240 V-12 Wire set

FAQ

Q: Can I install more than one heater in a sauna room?
A: Generally, it is recommended to install only one heater per sauna room unless following specific guidelines for twin-heater installations.

Q: What should I do if I encounter technical issues with the sauna heater?
A: If you experience technical problems, refer to the troubleshooting section of the manual or contact your retailer for assistance.

Q: Is it necessary to screw the heater to the floor?
A: In most countries, laws require heaters to be securely fixed to the floor to prevent accidents and ensure safety.

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