Wunda M06 User manual

1
Before you start:
1. Flow temperature gauge
and pump holder
5. Return temp
gauge holder
9. Pump
Please check the manifold and pumpset box contents against the images and list below.
7. Connector Washer
2. Lower pump holder
4. Wunda temp control
valve/mixer
3. Lower flow elbow
8. Isolation valve
(red lever)
& connector washer
8. Isolation valve
(blue lever)
& connector washer
7. Connector
Washer
7. Connector
Washer
7. Connector
Washer
7. Connector
Washer
6. Pump Washer
6. Pump Washer
11. Pumpset bracket - High Tech manifolds only**
10. Manifold Connectors
supplied with Premium
Stainless Steel Manifold.
Not required with our High
Tech Composite Manifold*.
M06
Wunda Pumpset
✆ 0800 5420 816 www.wundatrade.co.uk
THE BRAND YOU CAN TRUST
1. Flow temperature gauge and pump holder
2. Lower pump holder
3. Lower flow elbow
4. Wunda temperature control valve/mixer
5. Return temperature gauge holder
6. Pump washers x 2
7. Connector washers x 5
8. Isolation valves – pair (optional extra)
with connector washers x 2
9. Pump
10. Manifold connectors x 2*
11. Additional support bracket**
Supplied with High Tech Manifold
sets only.
Check the contents
Revision date: 25/4/2018

2
Understanding how the
manifold & Pumpset work
Warm water is pumped from the heat source to the manifold
and pumpset assembly. If the system requires a top up of
heated water, the temperature control valve will allow more
heated water into the floor heating system via a one-way
valve or release cooled water back to the heat source for
re-heating.
Temperature input is easily increased or decreased by turning
the mixer valve control head. Clockwise closes the valve and
decreases the flow temperature, anti-clockwise opens the
valve and increases flow temperature (see page 6).
From the upper flow bar, warm water is distributed to each loop
of floor heating pipe via an adjustable flow gauge. The water
then returns via the return valves into the lower return bar.
When the room reaches the required temperature the room
thermostat sends a signal to the wiring centre to switch off
the circulating pump and close the actuators. This shuts
off the water supply to the loops of pipe in the floor and
therefore shuts off the heat supply to that zone.
Before assembly of the manifold, pumpset or pressure testing,
familiarise yourself with the various stages of assembly and
the relevant fact sheet. We also advise to watch the online
tutorials and technical support videos.
Free technical support call 0800 083 2677
Warm water from
heat source enters
Cool water returns to
the heat source for
reheating
M06
Wunda Pumpset
✆ 0800 5420 816 www.wundatrade.co.uk
THE BRAND YOU CAN TRUST
Flow Bar
Return Bar
Manual air vent with hose
attachment for filling and
draining the system
Pumpset support bracket
required/supplied with High
Tech manifold only.
Use the additional Pumpset
support bracket when fixing
to our High Tech Composite
Manifold. (supplied with High
Tech pumpsets only).
Manual air vent with hose
attachment for filling and
draining the system
Revision date: 25/4/2018

3
M06
Wunda Pumpset
✆ 0800 5420 816 www.wundatrade.co.uk
THE BRAND YOU CAN TRUST
Identify and familiarise yourself with each individual component. Assembly of the pump set and pump is recommended on the bench prior to fitting the complete unit to the manifold.
The use of PTFE tape is not required when the supplied washers are fitted correctly, however if you wish we recommend the use of a liquid PTFE.
First connect the lower pump
holder onto the temperature
control mixer ensuring the correct
washer is located between the two
components.
Select a pump washer (large black washer)
and locate into the lower pump holder/
Wunda temperature control mixer. Again
tighten by hand taking care not to cross the
pump thread.
Select a pump washer (large black washer) and
locate into the top flow elbow & pump holder.
Tighten the pump holder onto the pump by
hand, be careful not to cross the pump thread.
Fit a washer into the lower flow inlet elbow and
screw the elbow onto the left-hand inlet (red
dot) side of the temperature control mixer.
1 2 3 4
Revision date: 25/4/2018

4
M06
Wunda Pumpset
✆ 0800 5420 816 www.wundatrade.co.uk
THE BRAND YOU CAN TRUST
locate washer into the lower return temperature
gauge holder and screw onto the right-hand
return (blue dot) side of the temperature control
mixer.
Fit the two isolation valves onto the flow and return feeds
ensuring washers are fitted correctly, blue tap is fitted to the
return (right) and red tap is fitted to the flow (left)
This pumpset is supplied with flow and return temperature
gauges which must be fitted into the flow and return
temperature gauge housings.
5 6 7
Revision date: 25/4/2018

5
M06
Wunda Pumpset
✆ 0800 5420 816 www.wundatrade.co.uk
THE BRAND YOU CAN TRUST
When connecting a Wunda pumpset to our High Tech
Composite manifold the pumpset support bracket
must be used to offer extra support for the heavy
pumpset. The bracket is adjustable and supplied with
2 x rubber mounts, 2 x brackets, 4 bracket bolts & 2 x
adjustable bracket nut and bolts. (Pic A)
The pumpset bracket is now ready to accept the pumpset
assembly, the flow bar is mounted to the lower section of
bracket and the return bar is mounted to the higher section
of bracket. Locate the 2 mounting rubbers, brackets & 4
securing bolts (Pic D).
Using the 4 bolts tighten and secure the brackets, securing the
pumpset to the adjustable support bracket. The pumpset will
have a small amount of movement within the brackets which
will allow for easier connection. The pumpset is now ready for
assembly onto the High Tech Composite manifold. Ensure the
supplied washers are used between the pumpset and manifold
connections (Pic F).
A
Insert the 2 adjuster
nuts into the long
slot from below
into the lower
bracket. Place the
upper section
of bracket over
the adjuster nuts
ensuring the nuts line up with the 2 holes in the
upper bracket. The long slot will secure and keep the
nuts captive (Pic B).
Pumpset connection to High Tech Composite Manifold
B
C
Screw the adjuster
bolts into the
captive nuts,
ensuring the nuts
are retained in the
slot. Do not tighten
at this stage (Pic C).
D
Return bar
mount position
Flow bar
mount position
Wrap the rubber mount around the flow bar and return bar
and place a bracket over each of the rubber mounts (Pic E)
EMounting Bracket
Rubber Mount
Once the pumpset has been connected and tightened to the
manifold, the bolts on the adjustable bracket can be tightened
(Pic G) Manifold not included in Pumpset contents
F
G
Revision date: 25/4/2018

6
M06
Wunda Pumpset
✆ 0800 5420 816 www.wundatrade.co.uk
THE BRAND YOU CAN TRUST
Two pumpset to manifold connectors are supplied and will need fitting to the left hand side
of both the flow and return bars (we recommend fitting these connectors to the manifold
bars before connecting the pumpset), these must be fully tightened at this stage. PTFE tape
or liquid may be used on connectors to the manifold if desired.
When connecting the pumpset
to the manifold ensure the
supplied washers are fitted to
both the flow and return of the
pumpset.
Loosely attach to the return
connector and then the flow
connector by hand, once both
have been connected then
fully tighten using a suitable
spanner.
(Manifold not included in
pumpset contents)
8
*For pumpset connection to High Tech Composite manifold please refer to relevant section
Pumpset connection to Premium Stainless Steel Manifold*
Revision date: 25/4/2018

7
M06
Wunda Pumpset
✆ 0800 5420 816 www.wundatrade.co.uk
THE BRAND YOU CAN TRUST
To protect final floor finish and have the correct settings for floor constructions,
the mixer valve must be set correctly. Flow temperature input is adjusted
by turning the black temperature control knob. Clockwise reduces flow
temperature and anti clockwise increase flow temperature.
Temperature range 30 - 70º C
• Pipe in Overfloor panel systems 35°C*.
• Pipe in Solid screed construction (staples, cliptrack, multipanel) 45°C*.
• Pipe in Joisted floor construction (spreader plate, foiltec) 65°C*.
Check with floor finish suppliers before introducing warm water into the floor
heating system as some flooring materials, in particular wood, require limiting
of floor surface temperatures. Floor surface temperatures can be automatically
controlled with the installation of our floor probe and correct thermostat
programming.
A flow and return temperature differential of approximately 7°C is preferred.
However flow input temperatures may be need to be increased or decreased
seasonally in extreme weather fluctuations to adjust system performance.
Adjust the flow temperature
to suit the floor construction
and floor finish.
Flow temperature is indicated
by the temperature gauge on
the top flow elbow.
Flow temperature setting. Guidlines for dierent types of oor heating
Clockwise decreases flow temperature
Anti clockwise increases flow temperature
Revision date: 25/4/2018

PLEASE READ: Important set-up info
MANIFOLD SIZE:
2-4 ports - total floor heating pipe length of up to 400 metres, the pump should
be set at no higher than speed 1
4-8 ports - total floor heating pipe length of up to 800 metres, the pump should
be set no higher than speed 2
8-12 ports - total floor heating pipe length of up to 1200 metres, the pump
should be set no higher than speed 3
FLOW RATES:
Each flow meter should be set up to harmonise the flow rate of each loop with
the system - please follow the instruction laid out in Fact Sheet M07 page 6
(downloadable from www.wundatrade.co.uk/factsheets/) or see the online video.
OTHER THINGS TO CHECK:
• Check that the red dot of the mixer valve is connected to the ow
• Check that your feed and return pipe sizes meet the requirements of the
manifold.
• Make sure your isolation valves are fully open
Please call tech support should you need any further guidance
Red Dot
In some cases, if the pump circulation speed and ow
meters are not set up properly, the premium mixing valve
may whistle. to avoid this, check you have covered the
following points during installation.
Wilo Grundfos
Pump speed selector
8
Revision date: 25/4/2018

9
M06
Wunda Pumpset
✆ 0800 5420 816 www.wundatrade.co.uk
THE BRAND YOU CAN TRUST
Supplementary information.
Floor surface temperatures
Before introducing heat into the floor heating system check with the
final floor finish supplier about maximum floor surface temperatures.
Generally a maximum floor surface temperature of 29ºC should not
be exceeded however many wooden floor finishes have a maximum
floor surface temperature of 27 ºC and must be layed in conjunction
with relevant underlay and moisture barriers.
We advise the use of floor probes in conjunction with room
thermostats be used in order to limit floor surface temperatures and
avoid damage to chosen floor finish.
In particularly large areas several probes and thermostats may be
required.
Wooden oor coverings
When installing wooden floor coverings over floor heating the floor
surface temperature must not exceed 27 ºC. Floor probes in
conjunction with room thermostats must be used in order to limit
floor surface temperatures and avoid damage to wooden floors.
Expansion gaps must be used to allow for expansion and contraction
movement of the wooden flooring as specified by flooring suppliers.
Birch and Maple are not suitable for use with floor heating due to
excessive amounts of expansion. Laminates and engineered woods
less than 25mm thick work well with floor heating. All wood flooring
products must be acclimatised to the heating system and its
operational temperatures by following suppliers guide lines.
Water Treatment (required to comply with product guarantee)
Specialist water treatment suppliers such as Sentinal or Fernox will be
able to advise on all water treatment issues and dosage
requirements. Flushing should be in accordance with BS:7593 to
ensure awareness of the preparation of the water circuit for the wet
heating systems prior to initial commissioning following major
remedial work such as boiler replacement and the ongoing water
treatment to ensure continued efficiency. The water volume in a
16mm pipe Floor Heating system can be calculated by multiplying
the total linear length of Floor Heating pipe by a factor of 0.113 this
will give the volume of water in litres.
In order to minimise corrosion, treatment of the water with an
inhibitor is essential, however, for a corrosion inhibitor to function
effectively, the metal surfaces must be clean. The British Standard
Code of Practice BS 7593: 1992 details the steps necessary to clean a
domestic central heating system. The Code recognises that it is not
possible to clean a system without the application of a cleanser.
Different products may be used depending on the nature of the
system involved.
The most effective corrosion inhibitors act by reacting with the
surface of the metal to produce a protective film in the form of a
stable complex. The effectiveness of a given corrosion inhibitor will
depend on its concentration.
In a multi-metal system, the product selected should contain a blend
of inhibitors such that each metal is afforded good protection. In
addition to the usual metals and alloys, e.g., iron, copper, steel and
brass, special consideration must be afforded to aluminium.
Normally this metal is protected by a film of aluminium oxide which
prevents corrosion in water (or in air), but under acid or strongly
alkaline conditions the oxide film dissolves exposing the metal. Some
waters found in the UK will give rise to sufficiently alkaline conditions
in a central heating system to promote corrosion of aluminium and
the gassing associated.
An increasing number of central heating systems contain aluminium
so it is advisable that a neutral (neither acid nor alkaline) corrosion
inhibitor product is selected in every case.
Consideration should be given to adding antifreeze to the floor
heating system especially during the winter months.
All information in this publication is given in good faith, and believed to
be correct at time of going to press . No responsibility can be accepted
for any errors, omissions or incorrect assumptions. Users should satisfy
themselves that products are suitable for the intended purpose and
application.
Wunda Group Plc operates a continuous product
development programme to maintain our reputation for
quality products and as such we do occasionally modify or
amend the specification of our products in line with our
strict quality control policy. Maintenance of the floor heating
system is straightforward and the pump, manifold, gauges,
valves and actuators are designed for continuous operation
over many years. Wunda Group Plc recommends regular use
of floor heating systems, this will ensure flow gauges, pumps
and valves are kept in good working order.
Important
“When mixed floor solutions are being served from the same manifold, a
floor probe must be used in the floor solution with the lower maximum
supply temperature. This is to limit the temperature in these floor areas
and prevent damage to the floor solution and/or floor finish.”
Revision date: 25/4/2018