Wilo Star-Z NOVA T User manual

4 245 740-Ed.01 / 2021-05
Wilo-Star-Z NOVA T
Pioneering for You
en Installation and operating instructions
fr Notice de montage et de mise en service
nl Inbouw- en bedieningsvoorschriften
es Instrucciones de instalación y funcionamiento
it Istruzioni di montaggio, uso e manutenzione
pt Manual de Instalação e funcionamento
tr  Montajvekullanmakılavuzu
da Monterings- og driftsvejledning
pl  Instrukcjamontażuiobsługi
cs  Návodkmontážiaobsluze
ru  Инструкцияпомонтажуиэксплуатации
sl Navodila za vgradnjo in obratovanje
uk  Iнструкціязмонтажутаексплуатації
zh  安装及操作说明

Overview
Installation and operating instructions Wilo-Star-Z NOVA T 3
English
Einbau- und Betriebsanleitung
1Overview
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Connections Page 9
Valves Page 12
Turning the motor head or removing it
Page 15
Connecting
Page 16
Switching thermal disinfection
on/off. Page 21
Setting the temperature control
Page 21
Setting the time switching
function Page 20
Setting continuous duty
Page 22
Setting the current time
Page 19
Type key Page 9
The menu Page 12
Faults Page 23
Standard display (exit from the
menu) Page 13
Operating button Page 12
Settings Page 19
Electrical connection Page 16
Safety Page 4
Operating principle Page 10
Installation Page 14

Safety
4WILO SE 05/2021
English
2Safety
About these
instructions
• Read through these instruc-
tions completely before
installation. Non-obser-
vance of these instructions
can result in injury to per-
sons and damage to the
pump.
• Once installation work is
complete, pass the instruc-
tions on to the end user.
• Keep the instructions near
the pump. They can be used
as a reference if problems
occur later.
• We accept no liability for
damages resulting from
failure to follow these
instructions.

Safety
Installation and operating instructions Wilo-Star-Z NOVA T 5
English
Warnings Important safety information
is indicated as follows:
DANGER: Indicates a
danger to life due to electrical
current.
WARNING: Indicates a
possible danger to life or risk
of injury.
CAUTION: Indicates pos-
sible risks to the pump or
other items.
NOTICE: Highlights tips
and information.

Safety
6WILO SE 05/2021
English
Qualification The pump may only be
installed by qualified person-
nel.
This device can be used by
children from 8 years of age
and above as well as by people
with reduced physical, sen-
sory or mental capacities or
lack of experience and knowl-
edge if they are supervised or
instructed in the safe use of
the device and they under-
stand the dangers that can
occur as a result. Children are
not allowed to play with the
device. Cleaning and user
maintenance must not be car-
ried out by children without
supervision.
The electrical connection may
only be established by a qual-
ified electrician.

Safety
Installation and operating instructions Wilo-Star-Z NOVA T 7
English
Regulations The current versions of the
following regulations must be
observed when installing the
equipment:
• Accident prevention regula-
tions
• DVGW worksheet W551
(in Germany)
•VDE0700/Part1
•Other local regulations
(e.g. IEC, VDE, etc.)
Conversion,
spare parts
The pump may not be techni-
cally modified or converted.
Only use genuine spare parts.
Transport Unpack and check the pump
and all accessories upon
receipt. Report any damage
sustained in transit immedi-
ately.
Dispatch the pump in the
original packing only.

Safety
8WILO SE 05/2021
English
Electrical
current
There is a danger of an electric
shock when working with
electrical current. Therefore:
• Switch off the power before
beginning work on the
pump and make sure that it
cannot be switched on
again accidentally.
• Do not kink or pinch the
power cable or allow it to
come into contact with
sources of heat.
• The pump is protected
against drips in accordance
with protection class IP42.
Protect the pump against
water spray. Do not
immerse in water or other
fluids.

Technical data
Installation and operating instructions Wilo-Star-Z NOVA T 9
English
3 Technical data
3.1 Type key
3.2 Connections
3.3 Data
See rating plate or Wilo catalogue for further
information.
Star-Z Series:
Domestic hot water circulator, glandless pump
NOVA Type designation
T T = with time switch, thermostatic valve and
thermal disinfection detection
Star-Z NOVA T
Installed with ball shut-off valve and
non-return valve with G1 thread
Wilo-Star-Z NOVA T
Mains voltage 1 ~ 230 V / 50 Hz
Protection class IP42
Nominal diameter of
connecting pipes R1
Port-to-port length 140 mm
Max. permissible
operating pressure 10 bar (1000 kPa)
Water temperature at
max. ambient tempera-
ture of +40 °C
+2 °C to +95 °C

Operating principle
10 WILO SE 05/2021
English
3.4 Scope of delivery
1Pump
2 Thermal insulation shell
32 flat gaskets
4Wilo-Connector
5 Installation and operating instructions
(not shown)
4 Operating principle
4.1 Application
This circulator is suitable only for drinking water.
4.2 Functions
Time switching function Up to 3 switch-on/off times can be programmed
using the time-switching function.
Factory setting: 24 hours continuous duty.
Temperature control The return water temperature is maintained at
the set value using the temperature control. To
do this, the pump is switched on and off auto-
matically.
This function
• lowers the danger of germ formation in the
circulation system from a set temperature
above 55 °C (DVGW requirement),
• lowers scale deposits,
• reduces power consumption.
Factory setting:
Temperature control switched off (no °C).

Operating principle
Installation and operating instructions Wilo-Star-Z NOVA T 11
English
Thermal disinfection The boiler is periodically heated up to approx. 70 °C
during thermal disinfection. If “thermal disinfec
-
tion” is switched on and the pump detects this due
to a temperature increase above 68 °C, it will run for
2 hours continuously, regardless of the time
switching function and will only switch off again
after this period.
Factory setting:
Thermal disinfection switched off (off).
Power failure protection In the event of a power failure, the current time is
maintained for up to 12 hours.
Upon initial commissioning, this is only guaran-
teed after 24 hours of operation.
The other settings are not affected by a power
failure.
NOTICE: The time switching function and
temperature control can be used simultane-
ously. Time switching has priority. If both func-
tions are active, there is no temperature control
during the switch-off period.
NOTICE: A learning phase starts after ther -
mal disinfection is activated.
During this phase, the pump is switched on
for 10 minutes, every 20 minutes. If there is an
increase in temperature, the time is logged and
the pump runs until the next temperature
increase. The time interval of both of these tem
-
perature increases is logged as the frequency for
the thermal disinfection.
Changes to the times are detected automatically.

Operating principle
12 WILO SE 05/2021
English
Valves The pump is equipped with a non-return valve (1)
on the pressure side and with a ball shut-off
valve (2) on the suction side.
When replacing the motor head (3), it is sufficient
to de-energise it by unplugging the connector (5)
and to close the ball shut-off valve at the rotating
slot (4). The motor head can then be simply
unscrewed.Page 15.
Blocking protection If the pump is switched off by the time-switching
function, the pump switches on automatically
for 10 seconds once every 60 minutes. This auto-
matic function cannot be switched on/off.
4.3 The menu
Operating button All of the settings in the menu are made using the
operating button:
Symbols The following symbols are shown in the menu:
•Press >5seconds
to call-up the menu.
• Press briefly
to select menu items and confirm
entered parameters.
• Turning
to select menu items and adjust
parameters.
5sec.
5sec.
•Clock menu
Setting the current time.
•Time switching function menu
Setting the parameters:

Operating principle
Installation and operating instructions Wilo-Star-Z NOVA T 13
English
- Time switching function is
switched off, 24 hours continuous
duty.
- Time switching function is
switched on.
- Setting the 3 possible switch-on
times.
- Setting the 3 possible switch-off
times.
•Temperature control menu
Setting the parameters:
- Setting the temperature.
- Switching the thermal
disinfection on/off.
•Standard display (exit from the menu)
The following is shown in the standard
display:
- Alternately, the time and set
temperature of the temperature
control.
- Thermal disinfection ON
(not shown when thermal
disinfection is switched off)
65 °C
11:30
65 °C
NOTICE: The temperature and thermal
disinfection is not shown in the standard display
until the time is set.

Installation
14 WILO SE 05/2021
English
5 Installation
5.1 Mechanical installation
Installation site Provide a weatherproof, frost-free, dust-free and
well-ventilated room for the installation. Choose
an installation site that is easily accessible.
1. Prepare the installation site so that the pump
can be installed without being exposed to
mechanical stresses.
2. Choose the right installation position – only
as shown in figure A.
The arrow on the rear of the housing indicates
the direction of flow.
DANGER: Before starting work, make sure
that the pump has been disconnected from the
power supply.
CAUTION: Dirt can cause the pump to fail.
Flush the pipe system before installation.
NOTICE: The ball shut-off valve and
non-return valve are pre-installed. Additional
stop valves are not necessary.

Installation
Installation and operating instructions Wilo-Star-Z NOVA T 15
English
Turning the motor head
or removing it
3. Release the union nut - unscrew it completely
if necessary.
4. Turn the motor head so that the
Wilo-Connector points downwards.
Tightening the union nut 5. Retighten the union nut using a suitable tool.
Opening the stop valve 6. Turn the slot (1) with a screwdriver so that it is
parallel to the direction of flow.
7. Fit the thermal insulation shell.
CAUTION: Do not damage the housing
seal. Replace damaged gaskets.
CAUTION: If the position is wrong, water
can enter the pump and destroy the motor or
electronics.
1
NOTICE: To close, turn the slot so that it is
perpendicular to the direction of flow.
CAUTION: The plastic parts of the motor
may not be heat-insulated in order to protect
the pump from overheating.

Installation
16 WILO SE 05/2021
English
Connecting 8. Connect the pipework.
5.2 Electrical connection
• Install a fixed connecting cable with an outer
diameter of 5 – 8 mm which is equipped with a
connector device or an all-pole switch (the con
-
tact opening width should be at least 3 mm).
• It is recommended to safeguard the pump with
a residual-current-operated protection switch.
• Maximum back-up fuse: 10 A, slow-blow.
CAUTION: Stop and non-return valves are
already pre-installed at a tightening torque
of 15 Nm (hand-tight). Tightening up to an
excessive tightening torque destroys the valve
screw connection and the O-ring.
When installing the valve, use an open-end
wrench to prevent twisting.
DANGER: Only a qualified electrician is per -
mitted to work on the electrical connection.
Before making the connection, ensure that the
connecting cable is not live.
NOTICE: The pump requires a permanent
power supply so that the pump functions can be
fully utilised. Do not connect the pump to a
boiler control system.

Installation
Installation and operating instructions Wilo-Star-Z NOVA T 17
English
Establish the electrical
connection as follows:
Image 1 Image 2
Image 3 Image 4
PE NL

Installation
18 WILO SE 05/2021
English
5.3 Filling and venting
1. Fill the system.
2. The pump rotor space vents automatically
after a short time in operation. This may cause
noise. If necessary, switch off and on repeat-
edly to speed-up the venting process. Dry
running for short periods will not harm the
pump.
Image 5
Open the Wilo-Connector as follows:

Settings
Installation and operating instructions Wilo-Star-Z NOVA T 19
English
6Settings
6.1 Setting the current time
NOTICE: The pump runs in continuous
duty until the time has been set.
The pump does not automatically switch over
from summer time to winter time.
1.
2. Select the clock (flashes). +
3. Set the hour. +
4. Set the minute. +
5. Select the standard display. +
5sec.
5sec.
12:
:45

Settings
20 WILO SE 05/2021
English
6.2 Setting the time switching function
To guarantee a DVGW compliant setting,
3 switching times are set at the factory:
1st switching time (on – off): 04:00 – 09:00
2nd switching time (on – off): 11:00 – 13:30
3rd switching time (on – off): 15:00 – 23:30
1.
2. Select the time switching
function (flashes). +
3. Selection (flashes). +
4. Set the hour for the first start-up
time.
Means: switching time, off. +
5. Set minutes for the first switch-
on time.
6. Set hours for the first switch-off
time.
7. Set minutes for the first switch-
off time.
8. Repeat steps 4 to 7 for the switch-on or
switch-off times 2 and 3.
Warns about a non DVGW-compliant setting
and appears when the daily switch-off time is
over 8 hours.
9. Select the standard display. +
5sec.
5sec.
-- : --
AA2

Settings
Installation and operating instructions Wilo-Star-Z NOVA T 21
English
6.3 Setting the temperature control
NOTICE: If the pump is running during a
switch-on time, “1/on”, “2/on” or “3/on” is
shown in the display.
During the switch-off time, “off” is shown in the
display.
1.
2. Select temperature control
(flashes). +
3. Set the temperature.
Setting range = 40 – 70 °C.
Means that the temperature
control is switched off.
The pump runs on, independent
of the return temperature.
+
Warns about a non DVGW-compliant setting and
appears when the temperature is below 55 °C.
4. Switching thermal disinfection
on/off. +
5. Select the standard display. +
5sec.
5sec.
65 °C
no °C
AA1