Wisy Sigma User manual

 Operating

instructions for

the SIGMA

rainwater unit

 Please read through

these instructions

carefully before

you attempt to

install and use the

rainwater unit!

 3- or 4-stage

self-priming

centrifugal pump

 Operates fully

automatically to

supply household

appliances on

demand

 Automatic mains

water top-up

with integral

9-litre top-up tank

 Energy efficient

technology, standby

usage less than 0.2 W

INSTALLATION INSTRUCTIONS

Rainwater Unit

SIGMA

WISY

Rainwater Harvesting

Original

ΣΣΣ

SIGMA

ΣΣΣ

30%

Harvesting rainwater

reduces mains water

consumption by:

50%!

WC:

30 %

Laundry:

13 %

Garden irrigation:

5 %

Cleaning:

2 %

13%

1Vortex ﬁne ﬁlter (WFF)

2Inﬂow calming

3Floating

suction ﬁlter

4Multisiphon

5Rainwater storage tank

6Sigma rainwater unit

7Filter collector (FS)

8Rainwater barrel 500 l

Stage 2

WISY inﬂow calming

prevents resuspension of

sediment and distributes

the fresh, oxygen-rich

water in the storage tank

Stage 3

Water is extracted with

the WISY ﬂoating suction

ﬁlter suspended

at the optimum height

Stage 4

Overﬂow with skim effect,

odour seal, small animal

guard and backﬂow pre-

vention with WISY multi-

siphon

The WISY 4-stage

rainwater cleansing

system

Stage 2

WISY inﬂow calming

prevents resuspension of

sediment and distributes

the fresh, oxygen-rich

water in the storage tank

The WISY 4-stage rainwater cleansing principle in the single-family home

Stage 1

Filtering with WISY

vortex ﬁne ﬁlter with

separation of dirt particles

and oxygen enrichment

SIGMA Rainwater Unit

Please read through these installation

instructions carefully before you attempt

to install and use the rainwater unit!

These installation instructions include the following information relating to:

 General description, applications and proper use

 Safety information and warning notices

 Delivery, scope of supply and design

 Recommended accessories

 Design and operating principle

 Installation

 Commissioning

 Maintenance, servicing

 Troubleshooting guide

 Technical data

 Guarantee conditions

 Company name and address

 Overview diagram (annex)

 Declaration of conformity (annex)

 Konformitätserklärung (Anlage)

Applications

The SIGMA rainwater unit developed by WISY is a complete rainwater harvesting

system with integral self-priming pump, control system and automatic mains wa-

ter top-up. It combines several devices to form a single package for installation.

SIGMA pumps the rainwater out of the storage tank and feeds it under pressure

into the rainwater supply circuit. At the same time, SIGMA monitors the ﬁll level

of the storage tank and automatically tops up the system with mains water when

required.

SIGMA is designed to supply toilet cisterns, washing machines and garden irriga-

tion systems in single-family homes with clear, ﬁltered rainwater.

Important preconditions for correct operation of the system:

 The suction line must be installed with a continuous rise from the rainwater

storage tank to the SIGMA unit. The wall unit must be installed above the

maximum water level in the rainwater storage tank.

 With a height difference of 3 m between the wall unit and the rainwater

storage tank base, the maximum length of the suction line is 15 meters.

 The suction line must have an inside diameter of at least 1“ (2.54 cm).

 A ﬂoating ﬁne suction ﬁlter SAFF (item SZ 9924) with non-return valve

is required in the rainwater storage tank

If the rainwater storage tank must be installed with a larger height differential

or at a greater distance from the rainwater unit due to the site topology, WISY‘s

OPTIMA/OPTIMAPlus rainwater units can be installed. OPTIMA rainwater units

operate without a suction line and are designed to pump water over longer line

distances/height differences.

SIGMA cannot be used to supply outlets at a rate of less than 1 litre per minute

(e.g. drip irrigation systems; outlets must close completely, the rainwater circuit

must be leak-tight).

SIGMA is not suitable for pumping dirty rainwater or well water (which contains

dirt or sand particles). SIGMA cannot be used to pump water out of a dirty rain-

water storage tank. Improper use of the equipment can result in destruction of the

pump.

OPTIMA rainwater units for greater

distances and height differences

Proper use

Improper use

With ﬂoating ﬁne

suction ﬁlter

(accessory) and

ﬂoat switch

Failure to heed the

information indicated by

this symbol could result

in serious or fatal injury.

Failure to heed the

information indicated by

this symbol could result in

death by electric shock.

Failure to heed the information

indicated by this symbol could result

in damage to the equipment, or

damage caused by the equipment.



1Mains water connection (top-up)

2Suction line connection (from storage tank)

3Pressurized outlet (for supply of the house)

4SIGMA mains plug

5Electrical connection for ﬂoat switch

6Emergency overﬂow drain connection (DN 70)

7Operating pressure indicator

(pressure gauge)

8Self-priming centrifugal pump

9Automatic switch (with display

and operator panel)

10 Base frame

11 Connecting hose to pressurized outlet

12 Float switch

13 Screw plug for venting/ﬁlling

Accessories not included

in the scope of supply:

14 Floating ﬁne suction ﬁlter (SAFF)

with non-return valve (accessory)

15 Isolating valves

16 Multisiphon (odour seal and

backﬂow prevention)

17 Water meter for mains water top-up

18 Water meter for pumped rising main

19 Flexible connecting hoses

20 Suction hose (minimum Diameter 1“)

Guide to components

11138

Safety instructions

Read the operating instructions carefully before commencing assembly and in-

stallation work and store them in a safe place for later reference.

Do not lift or pull the ﬂoat switch by its electric cable.

Never climb inside the storage tank when the SIGMA rainwater unit is connec-

ted to the power supply. Always unplug the SIGMA rainwater unit to disconnect

it from the power supply before carrying out any inspection, maintenance or

repair work to the SIGMA rainwater unit or inside the storage tank.

Never leave the rainwater storage tank unsupervised when it is open! No one ex-

cept specially trained personnel is allowed to climb inside the rainwater storage

tank. When working inside the tank, personnel must be supervised at all times

and must take appropriate safety precautions (e.g. wear a recovery harness).

If the residual current device or the fuse trips, the trip cause must be identiﬁed

and rectiﬁed by the manufacturer / by a contractor appointed by the manufac-

turer.

If the power cable to the SIGMA unit or the ﬂoat switch is found to be damaged,

it must be replaced by a professional electrician.

Installation work which involves particular hazards (e.g. risk to mains water sup-

ply or the electrical installation) must always be carried out by a properly trai-

ned, approved plumber or electrician who is at least qualiﬁed in the following

technical areas:

 Selection of appropriate tools and suitable electrical and installation

materials

 IP degrees of protection

 Correct methods of installing electrical and other materials

 TN-C system, TN-S system and appropriate additional measures

where necessary.

 Drinking water protection in accordance with DIN EN 1717, DIN 1989

Failure to install the equipment properly can endanger your own life and the

lives of people who use the equipment.

The system must be connected to a 230 V, single-phase AC (50 Hz) supply.

The SIGMA unit must be operated with clean water (rainwater or mains water)

which does not contain aggressive, abrasive or solid substances.

Failure to adhere to these instructions and/or unauthorized interference with

the SIGMA shall exempt WISY AG from any liability for any personal injuries,

property damage and/or damage to individual components of the SIGMA sys-

tem.

Delivery / shipment of the unit

The SIGMA product is generally shipped in a cardboard box. The cardboard box

must not be dropped, crushed or handled with force, and must be inspected for

damage as soon as it is received.

The cardboard box or its unpacked contents must be stored in a safe, dry, and

frost-free location and protected against the ingress of dirt or contaminants.

Scope of supply and design

 Self-priming, multi-stage centrifugal pump with automatic switch Zeta 02,

pressure indication: Operating pressure max. 3.3 / 4.4 bar; delivery rate

max. 65 l/min.

 Mains water top-up function compliant with DIN EN 1717, automatically ﬁlls

the mains top-up tank (9-litre volume) integrated in the wall unit when in-

sufﬁcient rainwater is available, ﬂoat valve with dirt ﬁlter; mains top-up tank

with safety emergency overﬂow DN 70.

 Cover to protect the rainwater unit.

 Wall mounting kit.

 Float switch (yellow) with stainless steel clamp for attachment to tube dia-

meter 110 to 130 mm, with 15 m electric cable without plug, for connection

to the wall unit.

Additional instructions

Wall unit for indoor installation

Storage tank equipment

Manual switchover to mains

water operation

Mains water operation when

rainwater level is low

Dry run protection

Accessories

Components which are not supplied as standard

 Hoses for connecting the SIGMA rainwater unit to the rainwater circuit and

the mains water top-up, two ¾“ pressure hoses with stainless steel sheath,

0.5 m in length, with 1“ union nut and ¾“ brass ball valve, with dirt trap for

mains water top-up (Item No. RW 78 00).

 SIGMA Cistern Connection Set (1“)

Consists of ﬂoating ﬁne suction ﬁlter SAFF with non-return valve, 10 m ﬂexible

suction hose, 2 stainless steel hose clamps and 1 hose connector.

 Wall or tube penetration WD 100, with 4 holes (1 x dia. 36 mm for suction line

1“, 2 x dia. 10 mm for electric cable, 1 x dia. 6 mm; Item No. WD 11 00).

Design and operating principle

The SIGMA rainwater unit draws rainwater from a storage tank and feeds it

under pressure into the rainwater supply circuit. If the water level in the storage

tank is low, the system automatically switches over to mains water operation.

The self-priming pump draws harvested rainwater out of the storage tank and

pumps it to the appliances. If a valve at one appliance (e.g. toilet ﬂushing sys-

tem) is opened, the pressure in the rainwater supply circuit drops. The pump

starts up when the pressure falls below 1,5 bar. When all valves at the appli-

ances are closed again and there is no ﬂow through the circuit, the automatic

switch shuts down the pump when operating pressure is reached.

Switchover to mains water top-up is fully automatic provided that the ﬂoat

switch in the rainwater storage tank is securely attached to the inﬂow tube (in-

ﬂow calming) at a vertical height of 30 cm above the base of the tank. If this

„minimum water level“ is reached, the ﬂoat switch in the storage tank closes.

(Mains) water is now sucked out of the top-up tank integrated in the SIGMA unit.

The drop in water level in the top-up tank causes the ﬂoat valve to open to allow

inﬂow of mains water into the top-up tank. In the rare occasion that the mains

water that is supplied to the top up tank is coming in with a very low pressure, it

can happen that the pump is drawing more water from the top up tank than can

be simultaneously replaced with mains water. In this case the automatic switch

stops the pump. After a few seconds waiting time the pump is automatically

switched on again. When the valves at all appliances are closed again, the pump

control system shuts down the pump as soon as operating pressure is reached

(= max. delivery head).

The automatic switch provides dry run protection when there is insufﬁcient

water in the circuit.

It is possible to manually switch the rainwater unit over to mains water opera-

tion. Manual switchover is possible irrespective of the ﬁll level in the rainwater

storage tank. Mains water operation can be selected by means of an electric

switch on the side of the automatic switch. If the switch is turned on, the self-

priming pump automatically extracts water from the mains water top-up tank

when an appliance valve is opened.

position of switch 0 = fully automatic function

position of switch 1 = unit draws mains water

Supply with rainwater

Connect the emergency overﬂow DN 70

Rinse piping and hoses

Note the length, height difference and

continuous rise of the suction line from the

storage tank base up to the Sigma unit!

Installation requirements

The SIGMA system must be installed by specially trained installation personnel,

i.e. by properly qualiﬁed, approved installation specialists and electricians. This

is a basic requirement for maintaining the validity of the manufacturer‘s guaran-

tee.

The SIGMA unit must be installed above the backﬂow level in a frost-free room

which has a ﬂoor drain. Special measures must be implemented if the unit is in-

stalled and operated below the backﬂow level. Please contact WISY‘s technical

support team for advice about installation below backﬂow level.

The suction tube must be installed with a continuous rise up to the SIGMA wall

unit. The tube must have an inside diameter of at least 1“ (2.54 cm).

With a height difference of 3 m between the tank base and the SIGMA unit, the

maximum length of the suction line is 15 meters.

The emergency overﬂow (DN 70) of the mains top-up tank must be permanently

and securely connected to a drain (minimum DN 70). The room in which the

SIGMA unit is installed must have a ﬂoor drain.

The water column between the bottom edge of the wall unit and the highest

operating point (valve at appliance) must not exceed 15.0 m.

The wall unit and the supply lines must not be installed in locations which are

exposed to substantial heat sources, as temperature rises in these components

can cause the system pressure to increase and result in component damage.

Piping or hoses must be cleaned or ﬂushed through before use to remove any

deposits of dirt/dust caused by building work. Protective plugs must be remo-

ved before pipes or hoses are connected.

Attention to backﬂow level and ﬂoor

drain in the installation area

Note height of

top edge of unit

Connection to the indoor pipework

Installation of components in the

rainwater storage tank

Installation

Line up the wall mounting kit horizontally and attach it to the wall. The wall-

mounting bracket can be used as a drilling template. The distance between the

holes is 28 cm. The wall unit can then be inserted in the groove of the bracket.

The connection between the wall unit and the rainwater supply circuit / mains

water pipe must be high pressure resistant, ﬂat-sealing and acoustically isola-

ted. The ball valve with dirt trap (accessory hose connection set RW 78 00) must

be used to connect the rainwater unit to the mains water pipe.

Clamp the ﬂoat switch to the inﬂow calming tube in the rainwater storage tank at

a vertical distance of between 30 and 35 cm from the tank base.

Attach the ﬂoating ﬁne suction ﬁlter with the stainless steel hose clamp to the

suction hose in the storage tank.

Route the electric cable for the ﬂoat switch and the suction hose (and possibly

the measuring lead for the level indicator) through a service duct into the utility

room of the building.

Fill the suction hose with water, then attach it with hose nozzle and isolating

valve to the suction end of the SIGMA wall unit with a hose clamp.

Do not install any ﬂow restrictions (water meters, ﬁlters, drain cocks, etc.) in the

SIGMA suction line.

Mains connection protected by RCD

The mains power connection (AC, single-phase, 230 V, 50 Hz) of the

SIGMA rainwater unit must be equipped with a residual current device (0.03 A)

and protected by a 16 A fuse.

Wire up the connecting cable of the ﬂoat switch to the plug supplied. See pho-

tograph on left for correct termination of wires. Insert the plug into the loosely

hanging, downward pointing socket outlet located between pressure control

and top up water tank underside of the wall unit.

All electrical work must be carried out in accordance with the safety instructions

given on page 5.

Install the wall unit inside the building

top

rear panel

of casing

Electrical connection of indoor wall unit

Insert

Commissioning the SIGMA

for comissioning a minimum water level of 0,5 meter in the

Rainwater tank is necessary

1. After ﬂushing out all dirt from the connecting pipe, completely ﬁll the pump

unit and the suction hose with water. The suction hose can be ﬁlled directly,

but the pump must be ﬁlled with water by opening the screw plug.

2. After ﬂushing the top mains water line, connect it to the unit. Open the

isolating valve in the mains top-up pipe. The top-up tank ﬁlls up with mains

water.

3. Connect the plug for the ﬂoat switch to the loose hanging socket at the

wall unit

4. Open the valves at the applications, e.g. toilet ﬂush.

5. Connect the SIGMA to the electricity supply.

6. As soon as all air has been removed from the system, close the valves at

the applications! When the maximum operating pressure is reached (maxi-

mum delivery head, see technical data), the SIGMA is ready to operate.

7. Check the propper function of the mains water supply, by switch over to

position 1. After the test return the switch to 0.

8. Replace the Cover of the top up water tank and replace the Cover of the

whole unit

blue

yellow/green

black, grey

or brown

black, grey

blue

yellow/green

Power plug for ﬂ oat switch



ZETA 02 Programming

Note:

The “Reset” button on the Zeta 02 serves two functions, if pressed for less than 1 sec. it will go

into reset mode, pump starts running. If pressed for longer it will go into one of the programming

modes below

Programming Run-on-time.

Mode 1 – Fast Flash

To Enter – Press and hold reset button (10 secs until LED ﬂashes green, then let go of the

button). Then brieﬂy press reset button to toggle between settings.

To save the setting press and hold the reset button until the power

light stops ﬂashing (approx. 10 secs.)



FAST FLASHING



OFF



FAST FLASHING



OFF





FAST FLASHING



5 sec Run-on-time (Default and

recommended setting for normal use)

3 sec Run-on-time

1 sec Run-on-time

Programming excess pump run and starts functions

Mode 2 – Slow Flash

To Enter – Press and hold reset button (20 secs until LED ﬂashes green, then let go of the

button). Then brieﬂy press reset button to toggle between settings.

D off = No time limited pump stop. Pump runs as long as water ﬂows

D on – Pump stops after 10 minutes continuous run.

(May need to leave this off for some irrigation applications).

T off = No pump stop in case of frequent on/off functions.

T on – Pump stops after 25 starts per hour. (Where multiple starts are occurring,

we would recommend installing a pressure vessel).

Save the setting by pressing and holding the reset button until the power light

stops ﬂashing (approx. 10 secs.)

IF either of these functions has switched the pump off, THEN the fault light (only) will show.

IF the fault light AND the power light show then this indicates that a “Dry Run” type fault has

occurred. (i.e. No ﬂow arrived at the zeta 02 when the pump power was on)



SLOW FLASHING



OFF



OFF



SLOW FLASHING



OFF



SLOW FLASHING



OFF





SLOW FLASHING



D off

D off (Default)

D on

T off

T on (Default)

T off

T on

Troubleshooting guide for Zeta 02

Type of fault Cause Remedy

The pump is running

continuously. a) Water loss of more than 0.7 litre/

minute from the circuit.

b) The switch

(RESET) is blocked.

c) The printed circuit board

is defective.

a) Check the entire installation,

water taps, toilets, etc.

b) Press the switch a number of

times. If it remains blocked,

contact customer service for

advice.

c) Replace the printed circuit board

(contact customer service).

The pump does not start. a) Insufﬁcient water, dry run

protection is active, LED

(FAILURE) is illuminated.

b) The pump is blocked.

The LED (FAILURE) is illuminated,

the safety system has been acti-

vated. After the switch (RESET) is

pressed, the LED (ON) lights up

but the pump does not start.

c) The printed circuit board

is defective.

d) Power supply fault.

e) Insufﬁcient pump pressure. The

safety system has been activated

and LED (FAILURE) is illuminated.

f) Air is entering the pump suction

line. The pressure gauge is indi-

cating much lower than normal

or strongly ﬂuctuating pressure

values. The safety system has

been activated, the pump is sta-

tionary. The LED (FAILURE)

is illuminated.

a) Find and remedy the cause for

the low water level; vent the

pump (and pumped rising main to

ZETA 02 if submersible pump is

connected) before recommission-

ing the system (contact customer

service if required).

b) Contact customer service.

c) Replace the printed circuit board

(contact customer service).

d) Check whether the electrical

power supply is functioning

properly. LED (POWER) must be

illuminated.

e) Check whether the pump is deliv-

ering the required pressure of 0.8

bar above the cut-in pressure of

the ZETA 02 controller.

f) Check and repair the hose and

pipe connections at the suction

end of the pump (contact cus-

tomer service if required).

The pump is starting

and stopping

continuously.

a) Leakage from water circuit. a) Check the water supply circuit

downstream of the ZETA 02

controller for water loss as a result

of open or dripping outlets, open

ﬂoat valves in toilet cisterns or

leaking garden hoses, close or re-

pair the outlets (contact customer

service if required).

Expansion vessel

If less than 2 litres of water is extracted per minute from the system, the pump starts rapid on/

off cycling, i.e. it switches on and off rapidly. This cycling behaviour can cause serious damage

to the pump. If it is anticipated that the pump will behave in this way, e.g. because it is used to

supply a drip irrigation system, we recommend the installation of a suitable diaphragm expan-

sion vessel.

Maintenance and servicing

Inspections/tests at 6-monthly intervals:

 Inspect the SIGMA system and the water circuit connections for leaks

 Check the system pressure indication

 Test the pump start and stop points at the automatic switch

 Test mains water operation, e.g. by setting the switch on the side of the au-

tomatic switch to „mains water mode“ and closing the isolating valve at the

suction end

Inspections/tests at 12-monthly intervals:

 Inspect the dirt trap at the isolating valve of the mains water connection,

clean the trap if required (call in a specialist if necessary)

 Inspect the ﬂoating ﬁne suction ﬁlter in the rainwater storage tank and clean

if necessary from ground surface level using a water jet or a long-handled

brush (call in a specialist if necessary)

Replacement:

 The solenoid valve at the mains water outlet must be replaced by a

specialist after the system has been in operation for 10 to 15 years.

Repairs

All repair work must be carried out by the manufacturer or by contractors who

have been explicitly approved by the manufacturer. Repairs, modiﬁcations to

components or modiﬁcations to factory-assembled SIGMA components carried

out by unauthorized persons shall invalidate the guarantee!

The SIGMA rainwater unit must be

disconnected from the mains power

supply before any maintenance work is

carried out on the open storage tank.

Compliance with the safety instructions

(see heading „Safety instructions“ in this

document) is absolutely essential!

Environmental guidance

The SIGMA rainwater unit is shipped in recyclable cardboard packaging.

Please recycle it as waste paper! Please take the Styropor packaging to your

local recycling centre.

Waste electrical and electronic equipment often contains valuable materials

which can be reused / recycled. However, they also contain harmful substances

which are essential to the proper, safe operation of the equipment.

These substances pose a risk to human health and to the environment if the

products are disposed of as general (non-recyclable) household waste or are

incorrectly handled. For this reason, you must never dispose of an old unit as

general (non-recyclable) household waste.

Use the recycling centres / facilities provided in your area to return defective

electrical or electronic equipment so that it can be recycled!

Disposal / recycling of

transport packaging

Disposal / recycling of old units

Troubleshooting guide

Type of fault Cause Remedy

SIGMA is not supplying water

to the appliance(s) a) Rainwater storage tank is empty, isolating

valve to mains water pipe is closed The dry

run protection function of Zeta 02 is active

b) The pump is sucking in air through the

suction line

c) Automatic switch Zeta 02 is not starting

the pump

d) The pump is blocked

e) The power supply is interrupted

a) Open the isolating valve, bleed the SIGMA

unit and the entire rainwater circuit, start

the pump by pressing the RESET button on

the automatic switch (Zeta 02)

b) Check that the suction line and the ﬂoating

ﬁne suction ﬁlter (SAFF) are correctly posi-

tioned and leak-tight; correct if necessary;

bleed the system

c) Press the RESET button! Call customer

service

d) Call customer service

e) Check the electrical connection, contact

customer service if necessary

The automatic switch Zeta 02 is switching the

pump on and off continuously a) Leak in the system, valves at appliances

are not fully closed

b) Automatic switch is soiled internally/ is

defective

a) Check the valves at appliances and the

rainwater supply circuit for leaks

b) Call customer service

Frequent switching of the pump causes

pump damage – disconnect SIGMA from

the power supply

Pump is running continuously a) Water loss of more than 0.7 l/min from

the system

b) Electronic circuitry (PCB) of the Zeta 02

is defective / Zeta 02 switch is defective

a) Check the valves at appliances and the

rainwater supply circuit for leaks

b) Replace the PCB or the Zeta 02 switch

(customer service)

Pump is not producing enough pressure a) The ﬂoating ﬁne suction ﬁlter / ﬁlter casing

of the SAFF is dirty

b) The pump is sucking in air

through the ﬂoating ﬁne suction

ﬁlter (SAFF)

c) The pump is defective

a) Clean the ﬂoating ﬁne suction ﬁlter (SAFF)

with a water jet or a ﬁne brush

b) Check the position of the ﬂoating ﬁne

suction ﬁlter in the storage tank and

correct if necessary

c) Call customer service

The residual current device has tripped a) Water or moisture on electrical

components

b) SA 06 is not operating

c) The pump or pump cable is defective

d) The ﬂoat switch or ﬂoat switch cable is

defective

a) Check the electric cable at the Zeta 02, the

cable between the pump and the Zeta 02

and the cable with plug to the ﬂoat switch,

call customer service if necessary

b) Check the power supply and, if necessary,

the PCB / Zeta 02, customer service!

c) Call customer service

d) Call customer service

Continual top-up with mains water even when

the water level in the rainwater storage tank

is sufﬁcient

a) Movement of the ﬂoat switch in the storage

tank is hindered, i.e. it cannot ﬂoat

b) The solenoid valve at the mains water

outlet is not closing

a) Inspect the ﬂoat switch, remove the

blockage (customer service)

b) Perform a function test on the solenoid

valve, replace if necessary, call customer

service

Switchover from rainwater operation to

mains water operation is not working and

the automatic switch is indicating a fault

a) The ﬂoat valve in the mains water top-up

tank is blocked or is not opening

b) The ﬂoat switch in the storage tank is

blocked

c) The ﬂoat switch is not transmitting any

signals to the solenoid valve

a) Perform a function test on the ﬂoat valve,

clean it if necessary, call customer service

b) Perform a function test on the ﬂoat switch

(customer service)

c) Check the ﬂoat switch, replace if

necessary (customer service)

Mains water is continuously running out

through the emergency overﬂow of the mains

top-up tank (audible!)

The ﬂoat valve in the mains top-up tank

is not closing

Check the valve; call customer service

Inadequate top-up with mains water,

the dry run protection function is active

The ﬂoat valve for mains water top-up is

blocked or the dirt ﬁlter at the valve inlet is

clogged

Clean the ﬂoat valve or the dirt ﬁlter, replace if

necessary, customer service

The pressure gauge (pressure indicator) is

showing a raised pressure

An external heat source (e.g. radiator) is cau-

sing a pressure rise in the SIGMA rainwater

supply circuit

a) Remove the heat source (if possible)

b) Contact customer service of your

installation company (it might be necessary

to install a pressure relief valve)

SIGMA units with level indicator:

The indicated ﬁll level does not match the

actual ﬁll level in the storage tank

See also section headed „SIGMA with level

indicator“

a) Basic setting error

b) Measuring lead is defective / not leak-tight

c) Level indicator is defective

a) Refer to operating instructions under

heading „SIGMA with level indicator“,

„Device setting instructions“

b) Contact customer service of your installati-

on company if necessary

c) Contact customer service of your installati-

on company

TW = Trinkwasser

Technical data

SIGMA 3 SIGMA 4

Power consumption

Motor power P1 (W)

Solenoid valve (W)

Standby consumption

600

< 0,2 W

800

< 0,2 W

Mains connection

1-phase AC

230 V, 50 Hz 230 V, 50 Hz

Rated current (A) 2,7 3,5

Degree of protection

Aspri suction pump

ZETA 02

Solenoid valve

Float switch

IP 55

IP 44

IP 65

IP 68

IP 55

IP 44

IP 65

IP 68

SIGMA water connections:

Inlet connection from

rainwater storage tank

Mains water connection

Outlet connection to appliances

(OT=outside thread, IT= inside thread)

1“ AG

¾“ AG

1“ AG

¾“ AG

1“ AG

Sound pressure level dB (A)

in decibels in

rainwater operation

mains water operation

Delivery head Hmax (m)

Flow rate Qmax (l/min)

Operating data

Max. operating temperature (°C)

Max. water temperature (°C)

Max. startup frequency per hour

Pumped ﬂuids

0.28 mm / 0.44 mm

ﬁnely ﬁltered rainwa-

ter, mains water (clear

water containing no

aggressive or abrasive

substances)

0.28 mm / 0.44 mm

ﬁnely ﬁltered rainwa-

ter, mains water (clear

water containing no

aggressive or abrasive

substances)

Max. operating pressure (bar) 10 10

Electric connecting cables

Float switch

ZETA 02 (SIGMA mains cable)

15 m, bare cable end

(3 x 1 mm2)

1.4 m, with plug

(3 x 1 mm2)

15 m, bare cable end

(3 x 1 mm2)

1.4 m, with plug

(3 x 1 mm2)

Materials

Suction pump of SIGMA 3 and 4 systems

Suction and discharge casings made of dezinciﬁcation resistant brass or alternatively

from cataphoretic coated cast iron

Pump casing and impellers made of stainless steel AISI 304

Shaft made of stainless steel AISI 420

Carbon / ceramic mechanical seal

Diaphragms made of glass-ﬁbre reinforced Noryl®

Motor enclosure made of light metal L-2521

Automatic switch

Polyamide, polypropylene (casing)

Mains water top-up tank

Polystyrene (tank)

Float valve made of KTW-approved plastic

Screw connections, pump connections

Brass, stainless steel

Connecting hoses

Natural rubber with stainless steel braiding

SIGMA rainwater unit casing

Stainless steel (base frame)

Polystyrene (cover)

Float switch

Polypropylene (casing)

Polyamide, PG 11 (cap nut)

Neoprene cable