Gigahertz Solutions NA7 Comfort User guide

Product­information

Nominal voltage / capacity

230 VAC +/- 10 %, 16 Amp., 2300 watt filament lamp load

Mechanical durability of the relay

approx. 15.000.000 operating cycles

Residual ripple (nominal/typical/maximum)
< 2 mV / < 4 mV / < 8 mV

Monitoring voltage

Building biology compatible DC voltage (max. 8mA / 230 VDC

Single-poled disconnection for optimum operator protection. A mini­mum residual ripple is quaranteed by a low resistance PTC connection
to the terminal "neutral".

Innovation

Various granted and pending patents are an impressive proof of our
technical superiority in comparison with the state-of-the-art compared
with other devices on the market.

Safety

The Demand Switches NA1 comfort to NA8 comfort were the first
"decouplers" ever to be certified the VDE (the Association for Electri­cal, Electronic & Information Technologies) certificate for fulfilling the
severe safety regulations. VDE identification number: 40000677

Practical efficiency

The Gigahertz Solutions Demand Switches have been installed by
many experienced electrical engineering technicians for many years.
They are on the recommendation lists of renowned building biologists
and are in use in thousands of households every day.

Two years guarantee

Developed and produced by
GIGAHERTZ SOLUTIONS Ltd
Am Galgenberg 12, 90579 Langenzenn
Germany
Tel. [phone], Fax [phone]
www.gigahertz-solutions.de

Further information and answers to frequently asked questions on
mains disconnection and field strength measurement techniques to
be found in the internet under: www.gigahertz-solutions.de

Errors and alterations excepted. No liability assumed for inappropriate use.

DRU0171 KW442006

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Innovative Electronic
EMF and RF-Technology
Made in Germany

Further operative notes

The circuitry used here is the only one on the market with the ability to
"identify" all normal electronic consumers.

However, exceptions can never be completely excluded. In this case,
briefly make use of an auxiliary electrical load (e.g. a filament bulb) in
order to energise, or switch on a base load (available as accessory) some­where on the circuit.

Even impulse relays with a control voltage of 230 Volt will normally not
impede the trouble-free function of this Demand Switch. Impulse relays
are employed, for instance, for lights in corridors or staircases when these
are to be operated from various switches (push buttons).

In the case of external overvoltage being applied, an internal overheating
protection could be the reason for the Demand Switch not to be able to
decouple by itself. If this happens, it is necessary to switch off the main
overcurrent upstream circuit breaker for about one minute and then switch
it on again in order to re-initialise the device. Leave about 1 cm space to
the left and to the right of the Demand Switch for temperature compensa­tion.

Our ultima-series offers the possibility to automatically decouple a large
number of the problem consumers mentioned below point 6 (on the rever­se page). Further information available et al. in the internet under
www.gigahertz-solutions.de.

Demand Switch

NA7 comfort

Installation and
operating instructions

Product information

Please make absolutely sure to carefully read these
operating instructions prior to initial operation.
You will find important information on the safety, the
installation and the use of the device.

A Demand Switch ­what for?

Electricity has become indispensable for every day life. The use of electri­city inevitably causes alternating electrical and magnetic fields. The effect
of these electrical and magnetic fields on the human oraganism has been
the subject-matter of many international studies with some concerning
results.

At present, the "safe" levels of electric and magnetic fields are still to be
determined, but it is now agreed by many doctors and scientists that the
levels should be reduced on the principle of ALARA (As Low As Reasona­bly Achievable). Magnetic fields should be measured and any wiring faults
corrected. Electric fields can only be reduced by using electrically scree­ned cables or using a "Demand Switch" whichremove the high (230 volt)
supply when there is no load on the circuit that needs power. This is par­ticularly useful at night-time.

A reliable Demand Switch optimised according to building biology criteria
can substantially reduce your daily exposure without your being inconve­nienced..It is for this reason that many experts recommend the decoupling
from the mains (often also called "isolation") as a first and important tech­nical step to be implemented when reducing alternating electrical and
magnetic fields.

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Safety information and
implementation requirements

Application in private households only. The installation of this electrical devi­ce is to be carried out exclusively by a skilled electrician.

The device must always be overcurrent protected by a 16 Amp circuit
breaker, which is to be switched off before installation. An upstream
connection to an RCD or an RCBO fault safety circuit breaker increases the
security level, but is not essential for the operation of the device.

Use approved phase indicators for no-voltage tests on the circuits.
Manipulations of the house consumer unit (fuse box) may cause perilous

electric shocks. Please precisely follow the connection instructions. Under
no circumstances allow the device to come into contact with water.

The enclosed label "Safety Information" is to be attached at a noticeable
position in the fuse box.

In the case of multi-installation of Demand Switches in one fuse box, they
must be mounted either on different bars or having a space and blanking
plate of at least half a unit (about 9mm) between neighbouring Demand

Switches.

Note: Please maintain these instructions in the fuse box in order to
have them at hand in the case of any potential questions arising in the
future!

Operational elements

Terminal Phase (L)
Terminal "Neutral" (N)

LEDs:
stand-by (green) ("betriebsbe-

reit")
circuit connected (yellow)

("-/+")
circuit disconnected (green)

("abgekoppelt")

Automatic on/off ("ein/aus")

Power output at user's side

Connection instructions
and functional test

Switch off the Main Switch for the electricity supply before installation.
Connect input "N" with the neutral conductor bar and input "L" with the out­put of the desired circuit breaker. Switch on the main switch.
Conduct a functional test ( p r i o r to connecting the output phase to the elec-

trical circuit)

- Green LED "stand-by" ("betriebsbereit") must glow permanently.

- If "Autom." is switched on, the device must uncouple and switch the out­put off.

Once again switch off the Main Switch. Connect the phase conductor of the
electrical supply circuit which is to be protected to the output "L". Switch on
the Main Switch. In the case of an inadvertent input polarity reversal, the relay
can clearly be heard toggling. If so, please check the connections and correct
them.

Brief instructions conside­ring the initial operation

Install the Demand Switch according to paragraph 3 and conduct the functio-

nal test.
Switch off all lights and devices connected to the relevant circuit, also units in

stand-by mode (unplug them if need be).
Push "Autom." button until it engages:

After approx. two to three seconds the Demand Switch should uncouple ("dis­connect") the respective mains section from the 230 V mains power supply.
This is indicated by the illuminated lower green LED ("230 V~: abgekoppelt").

Then plug the system control lamp included in the package into a clearly visi­ble socket in the bedroom. This serves as a function monitor, as it only glows
in the case of voltage supply.

EA neon "night light" or a light or socket switch with a neon glow lamp will, in
contrast, also glow when a.c. voltage supply is disconnected, as the monito­ring voltage of the Demand Switch allows both to be provided with DC volta­ge (230 VDC, max. 8 mA or 1.8 watt load) uncritical with regard to the building
biology.

If the Demand Switch
doesn't disconnect...

First of all check whether the "Autom." button has been pushed and
has fully engaged. If the button shows "Autom.: aus", the electronic

system is bridged and the relevant circuit is supplied with voltage.
If the "Autom." button is pushed, but either one or both yellow LEDs are

illuminated, the relevant mains section has not been uncoupled and is still
supplied with mains voltage.

- If both yellow LEDs are illuminated, major consumer loads must be on
the line.

- If only minor consumer loads are on-line, the LED on the right (+) will
go out first, eventually followed by the LED on the left (-).

The Demand Switch will not uncouple until the left LED (-) has complete­ly ceased to glow, also if it only glows very lightly. If in doubt, temporarily
disconnect the phase output "L" in order to repeat the functional test of
the Demand Switch (see par. 3). Should this test run successfully, one or
more permanent electricity consumers (such as electric clock or radio on
standby) must either still be connected to the ciricuit that you wish to pro­tect, or the wiring is faulty and the leakage current rate is too high.

For further steps please see par. 6.

Permanent consumers
prevent decoupling

If the Demand Switch does not uncouple, there must be hidden electricity
consumers on the line which need to be disconnected, such as:

Permanent minor consumers (clock radio, sensor dimmer, antenna
amplifier, motion detector, clock timer, roller blind controls, refrigerator,
dishwasher, waterbed, thermostat for electrical heating, comfort telepho­ne, fax machine, printer, scanner, etc.)

LBattery chargers (rechargeable shaver, toothbrush, telephone, game­boy, etc.)

Stand-by units (hi-fi system, television, video-tape recorder, etc.).
All these devices consume power even when "switched off" so that it

would make sense in any case to disconnect them from the mains, for
example by using a switchable multiple socket outlet. When using single­poled switchable multiple socket outlets it is important to pay attention to
the correct polarity (the phase must be disconnected!) - this will always be
the case if the wiring complies with the UK wiring regulations.

Further factors which can prevent decoupling may be too much leakage
current in the walls, too many light switches with glow lamps, or "baby
lights". The Comfort-series can "cope with" up to approx. 47 kOhm reduced
insulation resistance in the distribution network, which is considerably
lower than the test requirement to meet the IEE wiring regulations,

BS7671.

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L1
L2
L3

FI - Personen­schutzschalter
max. 30 mA

Sicherungs­automaten
max. 16 Amp.

abkoppler

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