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
ΣΣΣ
ΣΣΣ
ΣΣΣ
ΣΣΣ
SIGMA
ΣΣΣ
ΣΣΣ
ΣΣΣ
ΣΣΣ
EN

2
30%
5%
Harvesting rainwater
reduces mains water
consumption by:
50%!
WC: 30 %
Laundry: 13 %
Garden irrigation: 5 %
Cleaning: 2 %
13%
2%
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
6
7
8
1
4
2
3
5
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

3
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.
!
!


4
15
18
19
4
5
20
6
17
16
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
1
7
9
2
3
11138
10
16
12
20
14

5
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

6
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

7
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
!

8
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
blue
blue
yellow/green
Power plug for fl oat switch


9
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
 ON
 OFF
 FAST FLASHING
 OFF
 ON
 FAST FLASHING
 ON
 ON
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
 ON
 OFF
 SLOW FLASHING
 OFF
 ON
 SLOW FLASHING
 ON
 ON
D off
D off (Default)
D on
D on
T off
T on (Default)
T off
T on

10
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.