Uponor water underfloor heating systems

Uponor water underfloor heating systems
tep by step
April 2008
Installation Guide
a complete
a complete
underßoor system
2 2, using one simple pack.
, using one single code.
The simple route to a professional solution.
The simple route to a professional solution.
Chapter 1. Pack Contents and Components
Chapter 2. Planning Your Installation
Chapter 3. First Fix Plumbing and Wiring
Chapter 4. Compact Control Pack V4
Chapter 5. Manifold Connections
Chapter 6. Solid Floor Installation
Chapter 7. Timber Suspended Installation
Heat Outputs
Floor Coverings
The maximum output from an underfloor heating system is
often stated at 70 W/m2 for timber floors and 100 W/m2 for
screed floors.
Most floor coverings can be laid on UFH systems.
Chapter 8. System Wiring
For optimum performance, masonry coverings; ceramic
floor tiles, slate, stone, marble, etc. are chosen as this offers
minimum thermal resistance.
Chapter 9. Controls Setup
Chapter 1
0. Filling, Pressure Testing, Commissioning and Balancing
Chapter 1
1. Fault Finding
Chapter 1
2. User Instructions
In buildings that meet current Building Regulations, it is
unusual to require more than 70W/m2 heat output, based on a
20OC internal design temperature.
In older buildings it is important to consider greater heat
losses. Conservatories, rooms with high ceilings and areas that
are poorly insulated may require supplementary heating. As
with any home, the more effective insulation you have, the
more efficient heating system you will gain.
When designing conventional heating systems it is necessary
to know the required heat output to determine the size of the
heat emitter. When designing an underfloor heating system,
the heat emitter is the floor area and is fixed.
The heat output achieved is a direct relationship between
the difference in floor surface temperature and room air
temperature. The floor construction, floor covering material,
pipe size, pipe spacing (or pipe centres), and the temperature
of water circulating through the UFH pipes are major factors
that determine the floor surface temperature.
Considerations Wooden floors and carpets may also be used. Uponor
recommend a maximum combined thermal resistance of
0.15m2K/W is not exceeded for floor coverings. Carpet
underlays should be less than 1.0 TOG and should be suitable
for use with underfloor heating, while carpets should have a
maximum 1.5 TOG value.
Thick felts, thick underlay (TOG value greater than 1), and cork
should be avoided.
More detailed information regarding floor coverings can be
found in the User Instructions chapter.
In older buildings it is important to consider greater heat
losses. Conservatories, rooms with high ceilings and areas that
are poorly insulated may require supplementary heating. As
with any home, the more effective insulation you have, the
more efficient heating system you will gain.
NOTE: Consult your flooring supplier for additional
considerations such as maximum temperature
limits, wood drying conditions, special glues, etc.
NOTE: Refer to building regulations for further
information about tog values and insulation.
Pack Content & Components
75m coils of Multi Layer Composite Pipe (MLC Pipe) - 1013377
Uponor One Pack System
Single Zone, 1-loop Single Zone Multi-Zone
(max 14m2 pack) (2 loops or more)
Item code
Single Zone, 1-loop Single Zone (max 14m2 pack) (2 loops or more)
Solid Floor
16mm MLC pipe, 75m coil(s)
Single loop TM manifold
Compact Control Pack V4
TM manifold c/w CCP V4
The plastic pipe has an aluminium core
which ensures oxygen cannot permeate
and prevents the pipe from springing back
after bending and during installation.
Timber Suspended
T-37 Wired Dial Thermostat - 1000536
The T-37 Thermostat has a rotary hand
dial on the front of the thermostat for
adjusting the temperature. The thermostat
is wired back to the C-35 Controller which
in turn opens the actuators and operates
the boiler/UFH pump relay.
NB. The electrician will require 2-core
cable to install this component.
Edge Strip
Kombi Klips (long)
Double heat emission plates
T-37 wired dial thermostats
C-35 wired controller
I-35 setback timer
16mm x 3/4” pipe adaptors
Pipe cutter
Bevelling tool
2-port zone valve
Zone control pack
Manifold fixing brackets -pair
Single Loop Control Set
Uponor Compact Control Pack V4, Single
Loop TM Manifold and Wall Mounting
Brackets. Components boxed separately
and require on-site assembly.
C-35 Controller - 1000534
The C-35 Controller is used for connecting
the thermostats, the actuators and the
Timer I-35.
TM Manifold - 1002197
CCP V4 - 1002287
Manifold Fixing Brackets - 1002278
Underfloor Heating Pack - 1002288-94
I-35 Setback Timer - 1000540
The I35 setback Timer offers two timed
setback programs of the thermostats
connected to the C-35 Controller.
NB. A 2-core cable is supplied with
this component.
The Uponor Compact Control Pack is
for controlling the flow and temperature
of water around your UFH System. The
manifold, compact control pack there are
only a few connections to be made.
Pipe Cutter - 1001369
Uponor MLCP & PEX, Manifolds, Adaptors and Accessories
Plastic pipe cutter for 16mm
MLC Pipe.
Actuator - 1002053
24 volt thermal actuator, with open/
closed indicator, for use with Underfloor
Heating Pack for multi-zone systems.
Quantity supplied to match number of
manifold loops.
Bevelling Tool - 1006830
Installation tool for bevelling of 16mm
MLC Pipe.
Edge Strip - 1000080
The edge strip is used iaround the
perimeter of all walls to provide insulation
between the heated floor screed and walls,
and provision for screed expansion. 10mm
thick x 150mm high with self-adhesive
backing and strip on the outer face.
Zone Control Pack - 1002134
The Zone Control Pack comprises of 3
components: a 2 port motorised zone
valve, a 12 way wiring centre and a
programmable room thermostat. The pack
offers single zone time and temperature
control for systems that only require one
Kombi Klip - 1002297
The Kombi Klips are for use in screed
floor applications to secure the UFH pipe
work to the insulation boards. A minimum
insulation depth of 35mm is required.
Double Heat Emission Plate - 1034365
The heat emission plates are used in
timber suspended applications to support
the pipe in a meander pattern between
the joists at 200mm centres and transfer
heat to the flooring element. They are
made of 0.5mm thick aluminium sheet.
Zone Valve - 1002047
The zone valve is used to isolate the UFH
system from the rest of the system. It
is positioned on the boiler flow to the
UFH manifold. The zone valve comes
with 22mm connections and an auxiliary
Screw Connectors - 1013989
The screw connectors are used to connect
the UFH pipe work to the manifold.
Plate dimension 1150 x 380mm.
Planning Your Installation
This guide takes you through an underfloor heating installation using a ‘meander’ pattern, the easiest
and most flexible to plan.
Before laying any pipe, time should be spent planning a route
from the manifold location to the respective zones.
Worked example of zones & loops for suspended floor;
Linking Rooms
Once you have a clear idea of the installation, you can begin
to lay the pipe.
Manifold Location
During the pack selection process, a central and accesible
location is specified for the manifold, and this position must
not change during installation.
As a general rule, small rooms with similar occupancy use and
comfort level to that of a larger adjoining room, can be linked
together as one temperature controlled zone.
Examples of acceptable zoning, includes:
In the example shown to the right, the manifold is located in
the storage cupboard under the stairs. As the designer has
defined four zones, the manifold has four ports. In properties
with larger rooms, 2 or more loops may be required for a
heated zone.
Bedroom with en-suite
Bedroom with dressing room
Kitchen with small utility
Hall with adjoining WC/cloaks room.
Every room you have defined as a zone allows for
individual room control.
1 2 3 4
Loop Allocation
Also during the pack selection process a “Pack Selection Table”
will have been filled in, either on the computer or on paper. This
form is now required as a guide to your installation. The Pack
Selection Table identifies how many loops of pipe are required
for each heated zone. Below is an example drawing showing the
loop and zone allocation from the Pack Selection Table.
Plan to install one zone at a time, in a methodical order,
as pipework must not cross over. Utilise the ports of your
manifold sequencially, from the first to last or vice versa.
Allow room for your pipe to ‘run’ to zones and ‘return’ to
the manifold.
TIP: Lay pipe 100mm from walls, so not to damage
pipes when installing your
floor convering.
TIP: Lay feeds to heated zones at 50mm centres
between flow and return pipes. Leave space for
feeds routed through other areas.
IMPORTANT! Pipes must not cross over each other.
Floor Sensor
In wet areas, such as Bathrooms or en-suites, where regulations
do not permit installation of a room thermostat and individual
room control is required, fit the T-37 thermostat in the adjoining
room and connect an optional floor sensor (Item number:
First Fix Plumbing and Wiring
Compact Control Pack V4 - Single Loop Systems
Every underfloor heating installation will require a hot water feed from the boiler to the manifold. The
Heating Pack is designed to have the primary pipe work from your boiler enter the manifold assembly on
the bottom left. Various components in the one pack will need connecting to your existing electrics.
Zone Valve
Single Loop Systems
The Uponor Compact Control Pack is for controlling the flow and temperature of water around your UFH
System. For 14m2 single zone, only a single loop is required. The manifold, compact control pack and
brackets are supplied separately and require on-site assembly.
Programmable Thermostat
Radiator Circuit
Zone Valve
Room Thermostats or Single Programmable Thermostat
Boiler Return
Primary Pump
UFH Flow
UFH Circuit
Zone Valve
Pump Flow
Note, often the priamry pump is inbuilt within your boiler
Boiler Flow
Adding to an existing system.
First Fix Wiring
An ‘S plan’ plumbing arrangement is required to run an
underfloor heating system along side your existing heating
and hot water circuits. An S plan arrangement will allow UFH,
radiator and hot water circuits to be controlled independently,
each by two port motorised zone valves. If a mid position (Y
plan) arrangement is present on an existing system that you
wish to add to, Uponor advise altering the arrangement to S
plan, removing the mid position valve and inserting a two port
motorised zone valve to isolate the radiator circuit and a second
two port motorised zone to isolate the hot water cylinder. The
Uponor One Pack provides a third zone valve for the underfloor
heating system.
A 230V fused spur will be allocated to the UFH system at
or near the manifold location, to supply all of the electrical
components within.
First Fix Plumbing
The zone valve should be fitted on the pipe work between the
boiler (on the positive side of the primary pump) before the
We suggest the following sizes and pump settings:
Manifold MLCP Copper
1 circuit
2 circuit 16mm 15mm 2
3 circuit 16mm 15mm 2
4 circuit 20mm 15mm 3
5 circuit 20mm 22mm 3
6 circuit 20mm 22mm 3
7 circuit 25mm 22mm 3
8 circuit 25mm 22mm 3
CAUTION: All wiring must be completed by a
competant person and must comply with
current IEE regulations.
A 2 core plus earth cable with a minimum cable size of 0.5mm
and a maximum cable size of 1mm is required for use with the
T-37 thermostats. A cable size of 1mm is required for use with
the TP5000 programmable stat (single zone systems only).
Position the thermostats in each zone, out of direct sunlight
and away from other heat sources or draughts.
Each T-37 thermostat needs be wired back to the C-35
controller, which should be positioned above the manifold.
Optional floor sensor, for T-37 thermostat, is supplied c/w 4m
length of 2-core cable.
UFH Return
Assembling the Manifold
and Pump Connection Components
Assembling of the Manifold
and Pump Wall Brackets.
• Remove and Discard Manifold Securing Pipe Nipples
Place the wall brackets,1 behind the space between the
manifold and large swivel connecting nuts, the other to the
side of the fill and drain valves.
• Connect one end of the Manifold (with Flow Indicator)
to the Capped Lock shield Valve
• Connect the other end of the manifold to the 1”MI x
Swivel nut adaptor.
• Connect the High Limit Thermostat, Pump connection
and fill and drain assembly to the above.
The I-35 Setback Timer needs to be wired back to the the C-35
controller. Once set, the I-35 needs no further attention, so
this can be located close to the manifold, 2m length of cable is
INFO: Now place the bracket front securing straps into position then
secure the Manifold assembly with the fixing screws. (The
Brackets are designed to be a tight fit)
• Now connect the pump to the Flow assembly with the
pump flow direction towards the flow manifold section
on the top of the Pump.
The whole unit can now be positioned, marked then secured
to the wall, ready for the pipe connections.
• Connect one end of the Blue Capped manifold to the
Thermostatic Headed Mixing Valve.
• Connect the other end of the manifold to the 1”MI x
Swivel nut adaptor.
I-35 Setback Timer
NOTE: Photo excludes thermostatic control valve and
lockshield valve, which are supplied as component
parts of the Compact Control Pack V4.
• Connect the Pump isolating valve, Pump connection and
fill and drain assembly to the above.
The base of the manifold should be a minimum of 300mm
from the floor to allow room for the pipe to bend up to the
manifold outlets. Space must also be available to make the
primary pipe work connections on the left as shown.
• Now connect the pump to the Blue Capped Manifold
The I-35 Setback Timer is a time clock,
not an ON/OFF controller.
Compact Control Pack V4 - Multi Loop Systems
The Uponor Compact Control Pack is for controlling the flow and temperature of water around your UFH
System. There are only a few connections to be made.
Connections at the Manifold
1. Before pushing the pipe behind the manifold,
carefully bend the pipe to prevent it being damaged.
2. Line the pipe end up to the threaded port on the
3. Cut the pipe end square, level with the bottom of the
thread, using plastic pipe cutters, as shown.
Boiler Return
UFH Flow
Pump Flow
4. With the bevelling tool, centre and bevel the MLC
pipe to produce a chamfer of 2mm depth. Always
rotate clockwise.
5. Mark the insertion depth onto the pipe using the
tool provided.
6. Hand-tighten the compression adaptor fitting onto
the manifold outlet thread as shown.
Boiler Flow
UFH Return
7. Insert the pipe into the adaptor fitting and push until
the pipe comes to a halt as shown (the insertion
indicator should no longer be visible).
The Uponor Compact Control Pack is for controlling the flow
and temperature of water around your UFH System.
Single and Multiple Loop Systems
8. Now tighten the adaptor fitting onto the manifold,
using an appropriate spanner, until the insertion
depth mark can be seen again.
1. First, fit the pipe sensor within the 90 degree elbow as
2. Tighten the grub screw with the small Allen key included.
Next fit the thermostatic head onto the valve body.
Tighten by turning the metal ring clockwise until it is hand tight.
Using appropriate wall plugs and fixing screws, mount the
manifold on the wall. The base of the manifold should be a
minimum of 300mm from the floor to allow room for the pipe to
bend up to the manifold outlets. Space must also be available to
make the primary pipe work connections on the left as shown.
Solid Floor Installation
INFO: Once you reach the entry
point for this zone, pipe
direction is to the coldest
area of the room first, for
example, along external
walls and under windows.
Floor must be level, and swept clean of dust and debris before starting your installation.
Lay the pipe as you walk,
securing every half a metre
with a Klip, which is pushed
over the pipe and into the
NOTE: Edge Strip
Fix the edge insulation
continuously around all internal
and external wall edges, using
the adhesive backing. When
installed correctly the PE-skirt
will face out from the wall and
the embossed ‘Uponor’ will be
TIP: Insulation must conform to Building Regulations.
Lay the floor insulation over the entire floor area, butting up to
the edge strip, ensuring the PE skirt overlaps. Tape the PE skirt
onto the floor insulation. The Klips will grip to the insulation
to secure pipe in position. A protective membrane may be
required to protect the insulation from chemicals in the screed.
Please consult your screed supplier for guidance. If a protective
membrane is required, lay this immediately over the insulation.
You will lay pipe on top of the membrane and the Klips will
pierce through.
TIP: If you do not require a protective membrane,
you can prevent screed from slipping between
sections of insulations by taping at the seams.
The Uponor Kombi Gun;
A quick and simple method for fixing Uponor
MLC and PEX pipe to all common UK underfloor
heating insulation boards. Item number:
Travel to the furthest point of the room and make a 180O turn
as shown in the drawing below.
The pipe needs to ‘meander’ back and fourth across the floor
at 200mm centres on it’s return to the entry point, then follow
the same route back to the manifold.
living room
On returning back to the manifold temporarilly secure the
pipework; ready to make connections.
Once the first loop is complete work through the others one
after another. The example started with a loop for the living
room zone. The next zone in the example will be for the hall &
WC, followed by the utility and finaly the kitchen.
Planning Your Installation
Insulating Congested Pipe
When installing underfloor heating on a solid floor, it is
imperative the pipes do not cross over each other.
In order to prevent the floor from overheating directly below
the manifold or through doorways, or any areas where pipes
may be closer together, we would advise insulating the pipe,
especially if they are not used to heat the room through which
they pass.
Before laying any pipe, time should be spent planning a route
from the manifold location to the respective zones. Once you
have a clear idea of the installation, you can begin to lay the
Each loop must be installed without any joints in the floor.
To assist with installation, Uponor pipe is marked every metre.
Keep reference of how much pipe has been laid whilst installing
over the intended floor area. This will help ensure you return to
the manifold with sufficient pipe.
50m of protective conduit suitable for 16mm pipe, Item
number: 1012860
TIP: Feed pipes can be taken directly through
partition walls and into their respective zones to
reduce congestion.
NOTE: Ensure all pipe remains below the screed floor
finished level at all points. Where pipe passes
through walls, ensure the pipe is sleeved to allow
for expansion.
If required, lay more than one loop to a zone.
Laying Loops
IMPORTANT! A loop is one continuous run of pipe from
the flow port to a return port
of a manifold. Never join two coils in
attempt to create one longer loop of pipe.
Start with the first or last coil to be run from the manifold.
In the case of the example, the installer could begin with either
the living room or the kitchen/dining, We will start with the
living room. Take your first coil and temporarily secure the end
of the pipe at the manifold by lodging it behind.
Pipe should be laid 100mm from external and internal walls
until you reach the zone you have planned to install first.
living room
Your floor area is now ready to be filled and pressure tested.
Once filled and tested, lay screed as soon as possible to
protect the pipe. Avoid unnecessary foot traffic on the floor
area until screed is completely dry.
Consult you screed supplier for drying times.
Timber Suspended Floor
NOTE: Uponor Heat Emission Plate’s (HEP’s) are
dimensioned to fit on 50mm wide square edged
CAUTION: HEP’s are used for heat distribution only
and are non-load bearing. Always use safe
working practices when working with and
installing underfloor heating systems.
Planning the Layout of Heat Emission Plates
TIP: Ensure all insulation and battening work is
installed prior to laying the HEP’s.
NOTE: Your layout will be determined by joist direction.
HEP’s are only laid under straight pipe runs and should cover
approximately 80% of the floor area. When spacing out the
plates leave a gap between plates to allow for expansion, approx
10mm, but no more than 100mm.
Joist/ Batten Preparation
The joist layout should be examined before starting the
installation. This will enable you to address any variation in
joist widths (minimum 50mm wide) and joist centres (400mm)
before starting work.
Joists that are less than 50mm wide will require battening
along one side to provide adequate support of the plates.
For variation in joists you can either cross batten on top of
the joists or batten along the side of the joists. For additional
support provide intermediate battens between joists supported
on noggins.
TIP: When installing cross
battens or intermediate
battens, don’t fix the
batten ends until the
pipe has been laid.
This enables you to lift
the batten and install
the pipe without
notching or cutting
short the batten.
The pipe needs to ‘meander’ along the grooves, making 180O
turns, so at pipe bend locations the HEP’s should allow at least
300mm for the bend radius of the pipe.
Plates can be shortened at the break points. Keep the pipe
groove uppermost and sharply break the plate over a straight
TIP: Loose lay the HEP’s until you are confident with
the layout.
When the room is evenly covered with plates fix them down
using a staple gun or tacks.
Insulation must be installed between joists and as close to the
underside of the plates as possible. Uponor recommend using
a minimum of 100mm thick mineral wool, but where necessary
the insulation thickness should also comply with Building
Regulations/ Standards.
Heat Emission Plates
Uponor HEP’s are dimensioned to fit on 50mm wide square
edged joists at 400mm centres. Each plate is 1.15m long and
supplied with two score lines approximately 1/3 from one end
of the plate and at 1/6 from the other end.
Do not pull the pipe tight against joists.
Continue to meander the pipe along the grooves of the HEP’s
until it’s return to the entry point, then follow the same route
back to the manifold.
One loop is complete. Work through your installation one loop
after another.
IMPORTANT! A loop is one continuous run of pipe from
the flow port of a manifold to a return port
of a manifold. Never join two coils in
attempt to create one longer loop of pipe.
If required, lay more than one loop to a zone. Larger zones will
require more than one loop.
IMPORTANT! Do not lay pipe beneath shower trays as you
will dry out the water trap.
Notching joists
The following is an accepted guide to avoid potential structural
problems in domestic floors. Any notching outside of the
permitted zones must be subject to structural calculations by a
structural engineer to verify suitability. Joists can be weakened
and become structurally unsound by: holes drilled off the centre
line or near to the end of a joist, holes or notches made too
close together and, notching too close to the centre of the joist
Prior to installing the UFH pipes attention should be given to
planning the pipe routes to ensure that any notches are within
the permitted zones shown below.
Planning Your installation
When installing underfloor heating on a suspended floor, the
straight runs of the pipe lie in the grooves of the HEP’s. Before
laying any pipe, time should be spent planning the layout of
the HEP’s as well as a route for the pipe from the manifold
location to the respective area/room/zones.
Carefully consider the pipe route between joists
and notch the joists / battens accordingly prior
to installing the HEP’s
Once you have a clear idea of the installation, you can begin to
lay the HEP’s and the pipe.
Run the pipe from the
manifold below joist height
(joists may require notches)
until you reach the entry point
of the zone you have planned
to install first. At this point,
pipe direction is to the coldest
area of the room, for example,
along external walls and under
windows. Lightly press the
pipe into the plate grooves by hand or gently by foot. Be
careful not to permanently bend the plates as the systems
performance will be reduced. Once you have reached the end
of a straight run, make a 180O bend with the pipe to align
with the next groove.
Holes should be drilled or notched in accordance with BS6700,
BS5449 and NHBC regulations.
TIP: Laying the pipe
With a joist span of 3.5 metres between load bearing walls and
joist depth of 225mm, the notching zone :
Between 0.7 x 3.5 and 0.25 x
3.5 = 0.245 to 0,875 metres
from each wall.
The permitted maximum depth
of notch is 0.125 x 225 = 28mm.
Linking Rooms
As a general rule, small rooms with similar occupancy use and
comfort level to that of a larger adjoining room, can be linked
together as one temperature controlled zone.
Examples of acceptable zoning, includes:
Bedroom with en-suite
Bedroom with dressing room
Kitchen with small utility
Hall with adjoining WC/cloaks room.
Every room you have defined as a zone allows for
individual room control.
System Wiring
Single Zone Systems
System Wiring - Optional Floor Sensor
System Wiring - Multizone Systems
Optional Floor Sensor for Multizone Systems
Wiring T-37 room thermostats, thermal actuators and I-35 timer to C-35 controller
An optional floor sensor is available for connection to the
T-37 room thermostat. The floor sensor is not included as a
component in your UFH OnePack and will need to be ordered
Controller (C-35)
Solid Floor
If your system includes a floor sensor, a potentiometer fitted
on the Thermostat T-37 allows you to adjust the minimum
or maximum temperature settings for the floor. The floor
sensor can be used for maximum or minimum limitation of the
floor temperature, regardless of the room temperature. For
example, the maximum limitation will protect a sensitive floor
covering from exposure to too high temperature when there is
a high heat demand. The minimum limitation can keep a tiled
bathroom floor warm even when there is a no general demand
for heat supply to the room.
Controller (C-35)
Time zone 1*
Time zone 2*
No Setback control*
This terminal must be connected
*One of these three terminals
must be connected. Z1 and Z2 are
controlled by the Z1 and Z2 time
schedules within the I-35 Setback
Timer. The
terminal gives no
setback time.
Suspended Floor
Wire your first thermostat into 01 set of terminals; the first wire
into the bottom terminal and the second wire into one of the
other three terminals depending on how you want to control the
area heated.
Controller (C-35)
Wire all the actuators that will be controlled by the first
thrermostat. Start at 1a and work along; 1b, 2a, 2b, 3a, etc.
Controller (C-35)
Wire your second thermostat into the next available set of
terminals. DO NOT SKIP A SET OF TERMINALS. Your system will
not work properly.
Wire in all the actuators that will be controlled by a second
thermostat. Start in the same numbered set of terminals as the
Controller (C-35)
Controller (C-35)
Continue wiring your thermostats and actuators remembering
not to skip a set.
Plug the jack cable into the back of the I-35 Setback Timer and
only wire the black wire into number 1 and the yellow wire into
number 2 of the C-35 Controller.
System Wiring - Multizone Systems
Wiring 230V supply to C-35 Controller and Compact Control Pack via 12-way wiring centre
System Wiring - C-35 Wiring Schematic
Controls Setup
Single Zone with TP5000
Before programming the thermostat press the + & – AND  and  buttons
simultaneously to reset the unit (Fig.1)
Fig. 1
Temporary User Overrides
Setting the Clock and Day
Press PROG (Fig.2) to begin programming
Use + or – buttons (Fig.3) to adjust the TIME (Fig.4)
Press PROG again (Fig.2)
Use + or – buttons (Fig.3) until correct DAY is shown (Fig.5)
(1 = Monday, 2 = Tuesday, etc)
Fig. 2
The TP5000 has several useful overrides which can be selectedPROG
affecting the thermostat programming
• Selection of time or actual room temperature in main LCD display –
press + and – together to change between settings (Fig.11)
of time
• Temporary
override of programmed temperature – press  or  until
or actual room
temperature is displayed (override will automatically cancel at
in main of
next programmed event) (Fig.12)
• Temporary use of weekend programmes – press  and  together
once (override cancels at 2:00am) (Fig.13)
• Frost
Protection – a constant low temperature can be selected whilst
of - press  and  together twice (Fig.14). To return to
from home
press  and  together again
Fig. 11
Selection of time
or actual room
in main LCD
Fig. 12
override of
Fig. 13
Temporary use
of weekend
Accepting the Factory Pre-settings
The TP5000 has pre-set times already programmed in, which often suit most
people (see Table below).
To accept these settings close the front cover and after 2 minutes the presettings
will automatically be accepted.
To adjust the factory pre-settings & set your own time and
temperature programmes
Fig. 3
Summer Time
use / Winter Time Clock
of weekend
change from Summer to Winter (clocks back) press and hold - button (Fig.15)
To change from Winter to Summer (clocks forward) press and hold + button (Fig.15)
Fig. 14
Fig. 15
Fig. 4
For Days 1-5 (weekdays)
Battery Replacement
a)Press PROG (Fig.2) 3 times to show the 1st pre-set time and temperature
(Event 1 Days 1,2,3,4,5) (Fig.6)
b) Use + or – buttons (Fig.3) to adjust the TIME (press and hold to change in
10 min increments)
c) Use  or  buttons (Fig.7) to adjust the TEMPERATURE
d) Press PROG (Fig.2) to move to next preset time & temp (Event 2) (Fig.8)
e) Repeat steps b, c & d for programming Events 3, 4 5 & 6
A low battery symbol will flash in the LCD display (Fig.16)
You have 15 days to replace the battery before the unit will switch off.
When changing batteries, remove old batteries and insert new ones within
ONE MINUTE and programming will not be lost.
NB. If the display
ever goes blankClocks
during normal operation, the batteries will
back the unit reset
need to be renewed,
and the time and programmes reset.
Fig. 5
Fig. 16
Fig. 6
For Days 6-7 (weekends)
Press PROG (Fig.2) to show 1st pre-set time and temperature (Event 1
Days 6-7) (Fig.9)
Repeat steps b, c and d above to programme time and temperature events
for the weekend
1.5v AA Battery
1.5v AA Battery
Fig. 7
1.5v AA Battery
1.5v AA Battery
Weekdays (Mon - Fri)
Temp OC
Weekend (Sat - Sun)
Temp OC
Returning to RUN mode
Press PROG (Fig.2) – the colon in the LCD display will start to flash (Fig.10)
Fig. 8
Fig. 9
Fig. 10
Multizone Systems Controls Setup
T-37 Thermostat, I-35 Timer and Eco Function
I-35 Settings
1. Set the Year
2. Set the Month
3. Setting day of the Month
4. Setting the Time
5. Programming On/Eco Periods
6. Holiday Setting
7. “Auto” Automatic Mode
8. Manual Override Function
When you set your thermostat using the jog wheel you will notice a longer line
compared to the others. This equates to a temperature of 21oC when aligned with
the marker on the thermostat. The increasing line lengths on the jog wheel indicate
higher temperature, so turning the wheel clockwise will increase the room temperature
When the I-35 is running in comfort mode then the thermostats will work to the set
When the I-35 is running in Eco mode then the thermostats will be working 4°C lower
than the set point. Example, if thermostats are set at 21°C then they will run at 17°C.
Advantage of Eco mode is improved efficiency, by not allowing the system too fully
switch off we prevent the floor from going completely cold. This prevents the need for
a long energy intensive warm up period.
I-35 Settings
1. Set the Year
6. Holiday Setting
When you have installed batteries you will be presented with a
flashing field, use the + & - buttons to set the year and confirm
with the ok button.
2. Set the Month
Press the suitcase symbol and use the + & - button to set the
amount of days holiday. Press ok to confirm, LCD will display
a snowflake indicating a reduced temperature setting (ECO
mode). Your heating will now run at a lower temperature during
the holiday period. To cancel holiday mode simply press mode.
01 is January, 02 is Febuary and so on. Again confirm with the
ok button when correct month is selected.
7. “Auto” Automatic Mode
3. Setting day of the Month
Press Mode button until pointer appears under Auto. In this
mode the timer displays time, day and temperature schedule for
each zone.
Use + & - , again press ok to confirm.
4. Setting the Time
2 time channels
Simply use + & - to select correct time. Again confirm with ok.
The I-35 has two inbuilt timers, Z1 and Z2. These can be set
to give timed ON/Eco periods for 2 independently timed UFH
The timer uses a 24 hour clock, so 3.05pm is displayed as 15:05
5. Programming On/Eco Periods
In automatic mode, use + or - button to make selection.
Press Mode
8. Manual Override Function
• Default is P2 schedule, allowing 2 On & 2 Eco periods per day.
Press and hold full temperature symbol for Comfort
Temperature Setting or press and hold half temperature
symbol for Eco Mode setting. Note when in override function
the system will continue in either Comfort or Eco until you
cancel by pressing either temperature symbol once.
The full temperature symbols above the time line indicate the
on periods, the half one’s indicate the Eco period ( reduced
temp setting or setback).
• If you are happy with this pre-set heating schedule press ok,
you will notice the day pointer has shifted to the next day. Day
1 Monday, day 2 Tuesday and so on.
• If you wish to change the pre-set press the Prog P1-P4
button, keep pressing to select the one that most suits your
needs. Again confirm with ok button once selected.
• You will notice P4 is empty, use the temperature symbols to
create your own heating schedule if the pre-sets don’t meet
your requirements. By pressing either one of the symbols you
will notice the time changes as well as the flashing cursor
moving along the time line. Once you are satisfied with the
program you have created confirm by pressing ok.
Z1 Z2
• When all 7 days are programmed the timer will simply return
to the time display.
Filling, Pressure Testing, Comissioning & Balancing
Prior to filling the system check each connection on the
manifold and Compact Control Pack is tight. There is an integral
fill/vent valve above and below the pump. Two hose unions are
required to connect onto the 3/4” thread.
• Ensure all electrical supplies are switched off.
• Remove the fill port caps and connect a hose union to each.
• Fit a hose to the lower manifold hose union and run the
other end of the hose to a suitable drain point.
• Connect a hose to the upper manifold hose union and
connect the other end of the hose to a mains water tap.
Pressure testing
• Uponor recommends that the system should remain under
A hydraulic pressure test must be carried out on all loops
prior to laying the screed or covering with the chosen floor
coverings. A hydraulic pressure test kit is available from Uponor
(Item Number 1004057).
• Individual loops need to be purged of air in turn. This is
• The integral valves in both end caps must be opened to fill
the system. Use the square key in the cap to open the fill
port valves.
• Ensure the thermostatic control valve and lockshield valve
are CLOSED and all connections are tight. To close the
control valve on the V4 Compact Control Pack, first remove
the white thermostatic head and use cap to close the valve.
achieved by opening the manual head (blue cap) on the
lower manifold, then fully opening the corresponding
topmeter on the upper manifold. To fully open the
topmeter, remove the red locking ring and turn the
topmeter 3 full turns from the closed position. Before
attempting, read ‘TM manifold loop balancing procedure’
later in this chapter..
• Slowly turn on the water tap. As the first loop fills with
water, air will discharge through the hose to the drain. Once
the air stops and there is a steady flow of water, close both
ports on the manifold. Repeat this procedure for all UFH
loops on the manifold ensuring that the valves are closed
on each loop after filling.
• Isolate the primary flow and return to the manifold.
• Ensure that all flow and return valves to the UFH loops are
• Use the pressure gauge on the pressure test kit to monitor
• Connect a pressure pump to the hose union and open the
pressure whilst the floor is laid so that if any damage occurs
to the pipe, the laying of the floor can be stopped and
the damage repaired immediately. The floor should be laid
immediately after the pressure test.
• Where there is a danger of freezing, suitable measures
such as the use of glycol-based antifreeze should be
taken, using the correct mixture of water and antifreeze
solution. However, before start up, the glycol mixture must
be thoroughly flushed out of the system and disposed of
valve on this end cap. Ensure the other hose union valve is
• Pump up the pressure in the manifold to 2 x the operating
pressure (minimum 4 bar, maximum 6 bar) for at least 1
hour. After an initial slight drop in pressure as the pipes
expand, there should be no further drop in pressure. Check
the pressure gauge during this period to ensure that the
pressure remains constant under this period.
Use of Corrosion Inhibitors
Uponor UFH pipes will not be:
• Adversely affected by corrosion inhibitors normally used in
• Remove the white cap from the lockshield valve and close
central heating systems.
off with an Allen key.
• Adversely affected by accidental contact with linseed oil
based sealing compounds, or soldering flux. However, the
latter should not be used for making joints to the pipe.
• Fully close the valve on the elbow of the Compact Control
Pack at the circulating pump inlet to ensure that water is
forced around the UFH loops when filling and not short
circuiting between the upper and lower manifold headers.
water before disconnecting the hoses.
circulating pump inlet.
IMPORTANT! Remember to open the valve at the
circulating pump inlet.
IMPORTANT! Fill loops independantly of each other.
• The thermostatic head is set to the required water flow
temperature for the underfloor heating system, typical
settings as follows:
Screed floors: 40 – 45 C
Wooden floors: 50 – 55OC
• The high limit thermostat does not need any adjustment. It
is preset to 60OC.
• The lockshield valve needs to be opened so that it forces
Close all underfloor heating loop flow and return valves on
the manifold.
pipe will not be attacked by any constituents of concrete,
screeds, mortars, and is fully resistant to attack from micro
• Close the valves on the end caps and switch-off the mains
• Important: Please remember to open the valve at the
• Affected by soft, hard or aggressive potable water. The
the majority of the water around the UFH system. The
primary and secondary pump speeds, existing primary
pressure and manifold size will affect how far open the
lockshield valve needs to be opened, usually around 3
full turns from the closed position. The lockshied valve
may need to be opened less/more depending on system
• To make an adjustment first unscrew and remove the white
cap. Use the included Allen Key to adjust the valve.
• To calibrate it is recommended that the lockshield valve
is first fully closed and then opened until you see the
thermometer continuously reading the same temperature as
the setting on the injection valve head.
• Adjust the circuit flow rates by adjusting the flow regulators
(topmeters) -see following pages.
• Pump setting: normally speed 3
• Typical loop flow rates, for varying loop lengths and Floor
output [W/m2] are shown on the table at end of this
Starting-up the UFH System
System Start-Up
TM manifold loop balancing procedure:
Loop balancing
General Commissioning
When the system has been connected to the heat source and all
pumps, controls, valves and bypasses fitted, the system
• Remove the red cover from the topmeter as shown in
• Repeat the process for each loop, then go back and carry
• Ensure that all manifold return valves are fully closed
• If removed, refit all thermal actuators.
• With the electric power off, initially set all room thermostats
Commissioning is required to enable the system to meet its
design specification and comply with the energy efficiency
requirements of the Building Regulations. Commissioning
should only be carried out after the system has been run gently
for adequate time to allow floors to dry out (do not use the UFH
to cure the screed). The building work should be complete with
all external doors and windows closed.
should be checked and started as follows.
• Where applicable, ensure that the screed has had sufficient
time to cure in accordance with manufacturers instructions
and relevant British Standards, typically between 21 – 28
• Check and ensure all electrical controls are wired correctly
and in accordance with the latest edition of IEE Wiring
Regulations, or ETCI National Rules for Republic of Ireland.
• The system set-up and control arrangement should be
checked to ensure correct operation.
• Check that the system is filled with water and fully vented
of air and all isolating valves are fully open. Once this is
complete, the pumps should be run for 5 minutes and a final
check made to ensure that all air has been vented from the
• Check that the boiler is operating in accordance with the
manufacturers instructions and set to run with a flow
temperature at least 15oC higher than the UFH design flow
Fig 1. If the topmeter has been opened it needs to be closed
by turning it clockwise. All topmeters should be fully closed
at the start of the commissioning process.
(remove thermal actuators if fitted and replace with blue
manual caps).
5oC above current room temperature so that they call for
• Open the return valve on one loop and adjust the setting
of the corresponding topmeter, until the design flow rate is
reached, by turning the topmeter anticlockwise from its fully
closed position as shown in Fig 2. It is important that the
system and UFH pumps are running. Note, three full turns
from shut will fully open the topmeter. It is not possible to
adjust the topmeter further than this setting.
• The topmeter will not turn at all if the red locking ring is
fitted correctly. Fig 4 shows a correctly fitted locking ring.
All safety checks relating to the boiler operation, controls
wiring and water connections should have been performed in
accordance with manufacturers instructions and with statutory
requirements before system commissioning is commenced.
setting (between 25 - 30oC).
• Switch on the UFH system and ensure UFH pumps are
running and all relevant valves are open. Remember that the
thermal actuators take some time to operate and there will
be a 2 – 4 minute wait before they are fully open.
satisfactory, turn all room thermostats down and wait for the
system to stop.
should be refitted over the topmeter as shown in Fig 3.
• When the system has stopped, turn up one room thermostat
at a time and wait for the system to start. Then confirm that
the correct circuit (loop) actuator(s) has opened for that
particular room and immediately turn the room thermostat
down again in that room.
Table showing typical flow rates for 16mm MLCP
Loop Length (m)
Floor Heat Output (W/m2)
50 1.0 l/m 1.4 l/m 2.0 l/m
75 1.5 l/m 2.1 l/m 3.0 l/m
Note: Values based upon 16mm Uponor MLC pipes
spaced at 200mm centres with a 7.5oC flow/return water
temperature drop.
• Wait until the system has stopped and then repeat the
process on a room by room basis, ensuring that every
actuator is controlled by the correct thermostat and that
each one switched the system on and off. This should also
include the boiler being switched on and off, providing there
are no other user circuits, e.g. radiators and/or hot water
primary circuits, calling for heat.
• The flow rate for each UFH loop (in litres/min) is regulated
by topmeters fitted to the flow header on TM manifolds. Set
each loop by using the typical flow rate tables (overleaf) as
a guide, and then carry out the balancing procedure that
follows. Single loop manifold should have topmeter turned
to fully open position.
• Set the water temperature control at the lowest possible
• If the foregoing procedures have been completed
• Once the design flow rate is achieved the red locking ring
out fine adjustments, because each loop will have a mutual
effect on the others. If the valve topmeter or lockshield is
fully open and design flow rate is not achieved adjustment
on the pump speed may be necessary.
• Run the system at the lowest possible setting for at least 3
days, before raising the water temperature to the maximum
design temperature, which should be maintained for at least
a further 4 days.
• Set the room thermostats to the required levels and
programme the system controls to run as required.
• When running normally, the temperature difference between
the manifold flow and return connections may be between
5-10oC. To help assess the situation strap on thermometers
are available. Item number: 1002324
Final Loop Balancing
When the furnishings have been installed into the building
and normal working conditions achieved, the loops may
require a final balancing. The system should be run at design
temperatures for at least one week before this is done.
Fault Finding
The following flow chart shows general fault finding for Uponor One Pack UFH systems. The text that follows goes into more detail
on problems that may be encountered.
Note: Some adjustment to the lockshield valve, to less or more than 3 turns from closed, may be required due to variations in
installation conditions.
Fault Finding
Initial checks of the of the primary system
If a room fails to warm. General things to look for:
To make a repair to the pipe, follow the processes below:
If the water arriving at the manifold is either cold or below the
design temperature, check:
• That the room thermostat fitted is calling for heat and
For 16mm MLC pipe Items required:
• the boiler is firing
• the primary pump is fitted
• the primary pump is working
• the boiler is of adequate size
• the primary pipework is sufficiently sized
Fault finding - Electrical Problems
In all cases where an electrical fault is reported it is always
prudent to check the obvious before replacing components.
• Is there an electrical supply?
• Is it switched on?
• Are there any fuses that may have blown and need
• Are any components overloaded?
• Is everything wired correctly?
Under no circumstances replace a fuse with a higher rating than
stated for that piece of equipment.
The following flow chart is designed to aid the installer in
electrical fault finding when using a C-35 Controller in a multi
zone system.
If a loop or loops fail to warm, when other zones are working
General things to look for:
• Check that the corresponding manifold valves are open
• Check that there is a demand from the corresponding room
thermostat and/or the thermal actuator is open on demand.
• There may be an air lock in the loop, which will require
purging. Either shut down all other loops by closing
the valves at the manifold or turn down all other room
thermostats. This will concentrate all pump pressure to the
problem loop and may shift the air blockage. If all else fails
the loop can be flushed through with high-pressure water
following the instructions detailed in Filling, Venting and
Pressure Testing.
If circulation is apparent but poor, it may be that the lockshield
valve on the manifold requires adjustment.
Check the pump isolating valve on the V4 Compact Control Pack
is open.
that the valve has opened using the visual window on the
• That the room thermostat is connected to and
communicating to the correct actuator(s).
• That the room thermostats are not operating in temperature
set-back mode.
• That the primary flow and return connections are installed
• 2 x compression adaptors, item no 1013805
• 1 x 15mm copper compression coupler, item no. 1002115
• Plastic pipe cutter
• Bevelling tool
• Denso tape
Repairing the pipe:
• That the primary water temperature is not too low. This
needs to be at least 15OC higher than the UFH system water
• Isolate the damaged pipe loop at the manifold.
• Cut out the damaged section of pipe.
• Prepare both ends of pipe using the bevelling tool and pipe
• That the lockshield valve on the V4 Compact Control Pack is
• Slide the compression adaptor nut over each end of pipe,
correctly and not crossed over at the UFH manifold.
set correctly
• Thermal resistance of floor covering is not too high, as this
could reduce the floor heat output.
If the system is too noisy. General things to look for:
• There is no air in the system
• That all pipes are firmly clipped in place and that the
manifold brackets are tight.
• That excessive pressure from another circulator in the
system is not interfering (hence the importance of having a
primary bypass).
If the running costs are high. General things to look for:
prior to inserting the insert/sleeve into each end.
• Offer both ends of pipe/inserts to the compression coupler
and tighten both nuts.
• Ideally, the joint will require an inspection chamber in case
further maintenance is required. However, in practice this
is often not practical, and the fitting is wrapped in suitable
tape before burying in the screed (ensure approval with the
building inspector is sought prior to doing this).
• Pressure test
• Location of any repair joint should be recorded for future
• That the UFH system is correctly electrically connected to
the boiler to prevent short cycling and to ensure that the
boiler is not running when it is not required.
• That the room temperatures and thermostat settings are not
too high (typical comfort temperatures are 20OC in living
quarters and 18OC in bedrooms).
• For any open windows or draughts. It is not unknown for
windows to be opened in cold weather, as the internal
comfort remains constant with thermostatic controls.
• That the boiler is running correctly. Has it been serviced
and/or commissioned by an approved engineer.
• That the floor downward losses are high due to inadequate
level of floor insulation.
The system is losing pressure. General things to look for:
• If the system is losing pressure either during testing and/or
after the system has been filled, but the flooring has not
been laid, simple visual/manual checks around the manifold
and along each loop of pipe should identify the problem
• If there are no clear visual signs, each loop/circuit may
require a separate pressure test to identify the exact
• If the floor has been laid, identification of the fault can be
traced through signs of a wet patch around the leak.
Obviously to make the repair, the floor will have to be raised. In
screed floors, excavate carefully in the centre of
the wet patch.
• Any leaks on the manifold are generally due to the
connection and any loose nuts and unions will require
User Instructions
Single Zone Systems
TP 5000 Programmable Thermostat (USER adjustable)
If you turn down your thermostats by just 1oC you could
make savings of around 8% on your energy bill.
The TP5000 combines the functions of a room thermostat and
timer, allowing the user to program different temperatures for
different times throughout the day.
• Battery powered (2 x AA/MN1500/LR6 Alkaline batteries)
When away from home and overnight, we recommend you
program for a reduced temperature of around 4oC; commonly
called temperature setback or Eco setting. A small temperature
setback prevents the building from cooling down too much
and allows the system to respond more quickly when higher
temperatures are required.
For fuel efficiency, set the thermostat at the lowest temperature
you find comfortable during the periods when the home is
occupied. A useful fact to remember is:
Detailed instructions for programming and using your controls
can be found in this document under Controls Setup and in the
TP5000 instructions supplied with the unit.
• Weekday/Weekend (5/2 day) Programming
• Up to 6 time & temperature events each day
The system is virtually maintenance free with the UFH pipes
having a design life expectancy in excess of 50 years. However,
propriety equipment such as pumps, valves and other electrical
or mechanical components are all subject to wear and failure
after prolonged use. Uponor strongly recommend you take out
an annual maintenance agreement with a competent Heating
Engineer/Plumber to cover your entire heating system.
Installer Details
Installer Name:
Company (if applicable):
Product Guarantee
25 years for pipe or fitting defects due to materials or
manufacture when installed under normal conditions.
1 year from date of installation for electrical and mechanical
Full copy of Product Guarantee terms is available on request.
Programme number
Time clock
Low battery indicator
16:45 16
Heating on
Temperature override
If you experience a problem with your system, you should
initially make contact with the company, or person, responsible
for the installation. And we suggest that you record the contact
details below for future reference.
Floor Coverings
It is important to choose floor coverings that are suitable for use
with UFH and ideally, to maximize the system energy efficiency,
select materials with relatively low thermal resistances; heat
needs to pass from the water in the embedded pipes upwards
to the floor surface and then emit into the room itself, however
if high resistance floor coverings are used a greater amount of
heat will be contained in the floor structure and lost to ground
or the room below.
Multi Zone Systems
The Uponor Control System Wired is a complete room-by-room
control system for underfloor heating applications.
T-37 Thermostat (USER Adjustable)
The thermostat is the User’s device for controlling the
temperature within the room. It is important to set the
temperatures as low as comfortable possible – for every 1oC
reduction in the room temperature you could save around
8% on your fuel costs – typical set point temperatures are
20oC for living areas and 18oC for bedrooms.
UFH systems are designed to warm the upper surface of the
floor to between 25 to 29oC when in operation.
Always check suitability of floor coverings with the flooring
supplier before purchasing, with particular attention given to
maximum temperature limits of flooring material and adhesives,
together with any special installation requirements.
I-35 Timer (USER Adjustable)
The floor covering thermal resistance should not exceed
1.5 m2K/W; as per harmonized British and European Standard
BS EN 1264.
It is best to set the thermostats to your normal comfort setting
and use the I-35 Timer to program for ON and Setback periods
(referred to as ECO mode). During ON periods the thermostats
will control to their temperature setting and during OFF periods
the thermostats are usually wired for a setback temperature,
which is 4oC below its set point; for example, a thermostat set
to 20oC will be controlling to 16oC during the Timer OFF periods
(ECO mode).
Vinyl & Amtico, typically have a low thermal resistance, but
tend to be limited to around 27oC maximum floor surface
temperature. The vinyl tiles/sheets should be glued down with
a higher temperature adhesive that is suitable for use with UFH.
Use manufacturers’ 2 part HT adhesive with Amtico floors. The
heating should be switched off for 48 hours prior to installation
and left off for another 48 hours after installation of the Vinyl
Carpets (> 0.5 m2K/W thermal resistance):
An underlay and carpet combined value of up to 2.5 TOG is
acceptable when fitted onto a heated screed floor, although the
underlay used should not exceed 1.0 TOG and must be suitable
for use with UFH. Most underlay is of moulded waffle sponge
rubber construction and is suitable, but avoid felts, heavy
rubber crumbs and polyurethane underlay.
Recommended underlay includes:
• Duralay Heatflow by Interfloor (Tog = 0.75)
• Tredaire Technics 5 by Interfloor (Tog = 0.56)
• Tredaire Technics 6 by Interfloor (Tog = 0.66)
Low resistance floor coverings (<= 0.5 m2K/W thermal
Optional Floor Sensor
The thermostat has the option of connecting a floor sensor. A
floor sensor is used when control of a minimum or maximum
floor temperature is desired and setting adjustment is via the
potentiometer beneath the front cover. Any thermostat fitted
with a floor sensor should be correctly configured and mode of
operation explained by the installer.
Installation Completion Date:
Careful consideration should be given to the choice of floor
finishes and coverings for floor heated rooms.
Tel Number:
Detailed instructions for programming and using your controls
can be found in this document under Controls Setup and in the
Uponor Control System Wired Operating Manual supplied with
the unit.
Ceramic tiles, marble, slate, limestone, flagstones are all
excellent materials for covering heated screed floors, especially
in areas where heat losses may be excessive. Use a quality two
part flexible adhesive, rated to at least 50oC, to continuously
bond tiles/slabs to the floor substructure and flexible edge
joints to avoid cracking.
Polished Screed, which is highly conductive and well suited for
use with UFH.
• Roma by Ball & Young (Tog = 0.8)
For timber suspended floors the additional resistance imposed
by the floor boards need to be taken into account, therefore low
TOG value carpets should be used.
Solid wood boards up to 25mm thick, engineered hardwood
flooring up to 20mm thick and laminate boards are all
compatible with UFH. For Solid wood it’s important to maintain
moisture content of about 10% when laying. When installing
floating floors onto screed a thin low thermal resistance
underlay is required, such as: 2.75mm thick Duralay Heatflow
for laminate & solid wood floors (Tog = 0.35).
Copyright © Uponor (Uponor Housing
Solutions Ltd.)
Reproduction of any part of this publication
for any purpose is not permitted without the
prior written permission of Uponor Housing
Solutions Ltd.
1046443-V1-April 2009
The information in this publication is correct
at the time of going to press. Uponor reserves
the right to alter specifications and operating
parameters for all its Underfloor Heating &
Plumbing Systems at any time as part of its
policy of continuous product development.
Uponor Housing Solutions Ltd
Snapethorpe House
Rugby Road
LE17 4HN
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