Underfloor heating - Nu-Heat

Underfloor heating - Nu-Heat
Underfloor
heating
user guide
DS thermostats with timeclock
v17
© Nu-Heat 2016
UNDERFLOOR
HEATING
HEAT
PUMPS
SOLAR
THERMAL
working with you
before,
during
& after
your project
Nu-Heat
Know-How
2
For expert advice call us on 01404 549770 or Freephone 0800 731 1976
Contents
Welcome 04
About the Nu-Heat system
05
System startup
05
Operation06
Systems with dial thermostats & timeclock
07
Operating instructions for the dial thermosat
08
3-position slide switch
08
Leaving the building unoccupied
08
Sensor09
Heating options
09
Operating instructions for the timeclock
10
Zones10
Normal run mode
10
Setting the clock
10
Selecting 5/2 or 7-day programming
10
Programming a holiday
10
Adjusting switching times
11
Mode select
11
Copy function
11
Boost facility
11
Cleaning11
General system checks
12
General sequence of operation
13
Manifold components 13
Seasonal adjustments
14
System adjustments
15
Servicing requirements
16
Energy efficiency (ErP)
16
Product support
16
For more information visit www.nu-heat.co.uk
3
System Ref:
Every Nu-Heat system is a custom
design. Please record your unique system
reference number above for future use.
Welcome
Congratulations, you are the owner of a Nu-Heat warm water underfloor heating
system, designed and supplied by Nu-Heat UK Ltd., the largest supplier of domestic
underfloor systems in the UK.
This manual is provided to help you understand how the system operates and the
correct settings required to get the most from your heating.
Nu-Heat did not install your system, therefore any installation matters should be
referred to the contractor concerned. Please record the installer’s details below.
For more information on the operation of your system and also troubleshooting
help, please visit the Nu-Heat website at nu-heat.co.uk.
Installer details
Company:
Contact name:
Contact telephone no.:
Address:
4
For expert advice call us on 01404 549770 or Freephone 0800 731 1976
About the Nu-Heat System
Description
Underfloor heating works by pumping warm water through special plastic tubing
embedded in the floor. This warms the floor and maintains the room at a
comfortable temperature.
Benefits
In particular, underfloor heating systems:
•Provide a more comfortable heated environment,
• Permit unlimited interior design options,
• Increase the useable space within a property.
Moreover, all these benefits are available from a system which can be significantly
less expensive to run than a conventional, radiator-based system.
System startup
Once your system has been commissioned it should be fully operational. To initially
check that your system is turned on and working please follow these simple steps:
Underfloor heating
Locate the main components of your
installation: the boiler, hot water cylinder,
underfloor heating pump/Optiflo
manifold assembly(s), thermostats,
timeclocks, underfloor heating
wiring box.
Electricity supply
Ensure that the electrical installation is
complete and that the heating system
is turned on. The location of the main
supply ON/OFF switch may vary but is
often positioned next to the boiler.
There may be additional switches located
at each underfloor heating wiring box,
which also need to be on.
Water supply
Ensure that the water is turned
on ready for domestic hot water
operation, check that a high flow of
water is available from the cold taps.
If there is poor flow or none at all,
check that the stop-cock for the
property is fully open.
For more information visit www.nu-heat.co.uk
5
Operation
Your underfloor system is designed for
performance and economy. Each heating
zone is controlled by its own wall-mounted
thermostat. If a room has no thermostat
it will be connected to, and controlled
by, an adjacent zone.
UNDERFLOOR HEATING
Dial thermostats are timed using the
four-channel timeclock. As supplied
they will be set up such that when the
timeclock is in an ON period the room
will heat to the setting on the dial, but
when the timeclock is in an OFF period
a FROST PROTECTION temperature of
5°C will be maintained.
Less thermally responsive floors, in
particular screed floors greater than
65mm thick, will warm up more quickly
when the thermostats are changed to
operate in a setback mode. This means
that when the timeclock is in an ON
6
period the room will heat to the setting
on the dial, but when the timeclock is
in an OFF period a setback temperature,
4°C less than the dial setting, will be
maintained. The mode can be selected
on each thermostat individually, and is
set by altering the ‘DIL’ switches within
the thermostat. See page 6, noting the
safety warning.
The best way to find the optimum
temperature setting is to set a low
comfort temperature on the dial
(e.g.18°C) and then turn it up by 1°C
each day until the temperature is right.
For expert advice call us on 01404 549770 or Freephone 0800 731 1976
Consideration should be given to the
different floor constructions and
finishes used in your property, as these
factors will affect the time the system
will take to achieve comfort conditions.
Allowance should be made for
switching the system on in time for the
floor to reach comfort conditions by
the desired time. Different areas of the
property may be linked to different
channels on the timeclock (see page 7
for details), but for each of these the
timings should be set to account for
the slowest-responding room.
Systems with dial thermostats
& timeclock
Dial-type room thermostats offer a
straightforward method of controlling
room temperature.
The system will be timed by a multi-channel timeclock, and different channels may
have been used for different areas of the property. The dial thermostats have two
possible operating modes that affect how they respond to the timeclock:
TIMECLOCK ON
TIMECLOCK OFF
Thermostat will maintain the temperature
set on the dial.
Thermostat is in ‘Frost Protection’ mode.
Thermostat mode: ON/SETBACK Thermostat will maintain the temperature
(see page 9)
set on the dial.
Thermostat will maintain a setback
temperature 4˚C below the temperature
set on the dial.
Thermostat mode: ON/FROST
(default)
The default thermostat mode is ON/FROST.
Setback is required only for rooms with floors that prove slow to heat up.
THE EFFECT OF SETBACK (for illustration only)
20˚C
20˚C
early
morning
15˚C
20˚C
evening
16˚C
set-back
16˚C
daytime
16˚C
set-back
10˚C
1
Midnight
2
3
4
5
6
7
8
9
10
11
1
Midday
2
3
4
5
6
7
8
9
10
11
Midnight
For more information visit www.nu-heat.co.uk
7
Operating instructions for the
standard dial thermostat
Call for heat = red
= yellow
Setback
Normal = green
3-position slide switch
Up: (1) ON
Mid: (timed) º
Down: (0) OFF
Turn dial to set temperature
3-POSITION SLIDE SWITCH
ON: With the switch in the up-position (1) the thermostat will override the
timeclock and the temperature set on the dial will continue to be maintained.
This can be used to extend the heating period without the need to adjust the
timeclock program.
TIMED: With the switch in the mid-position (º) the thermostat will respond to the timeclock. Depending on how the thermostat has been set up at commissioning
it will operate in either ON/FROST or ON/SETBACK mode (see p.7 for details).
OFF: With the switch in the down-position (0) the thermostat will be essentially off and will not maintain comfort conditions but will, however, provide frost
protection.
LEAVING THE BUILDING UNOCCUPIED
• If the building is to be left unoccupied for a short period, this is managed by the
HOLIDAY mode on the timeclock. Individual thermostats will enter SETBACK or
FROST mode according to their settings.
• If the building is to be left unoccupied for a long period, slide the switch on all
thermostats to position 0 (OFF with frost protection). All thermostats will enter
FROST PROTECTION mode
8
For expert advice call us on 01404 549770 or Freephone 0800 731 1976
SENSORS
The heating system must be turned off and electrically isolated before changing
sensor switch settings.
Each thermostat has six sensor operation modes. These can be selected using
switches 1-3 accessible from the back of the thermostat, after removing the front
panel from the wall.
Internal air sensor: Uses the built in air
sensor only.
Remote air sensor (if installed): Uses the
remote air sensor only.
Set switches 1 to 3 OFF
Set switch 2 ON, switches 1/3 OFF
Internal air sensor & floor limiting sensor (if installed): Uses the built in air sensor
but also uses the remote floor sensor to ensure the floor temperature doesn’t
exceed a chosen limit. Should the floor temperature be exceeded (even if the
desired room temperature has not) the heating will turn off.
Floor temp. Applies to:
limit
Set switch 1 on, switches 2 and 3 OFF
25˚C
Most bamboo floor coverings*
Set switch 1 and 3 ON, switch 2 OFF
27˚C
Most wood or vinyl floor coverings*
Set switch 1 and 2 OFF, switch 3 ON
29˚C
General limit for bedrooms and living areas
Set switch 1, 2 and 3 ON
32˚C
Limit for bathrooms and en-suites
* Subject to the approval of the flooring supplier.
HEATING OPTIONS
Each thermostat also has two control modes, selected using internal switch 4; this
can be accessed inside the thermostat after removing the front panel.
Thermostat to be SET-BACK by 4˚C
when the timeclock dictates an off
period. Set switch 4 to ON.
Thermostat to be in FROST PROTECTION
mode when the timeclock dictates an
off period. Set switch 4 to OFF.
For more information visit www.nu-heat.co.uk
9
Operating instructions for the
timeclock
ZONES
SETTING THE CLOCK
PROGRAMMING A HOLIDAY
The timeclock can independently
control 4 ‘time zones‘, normally
allocated as follows:
The timeclock is 24 hour. To set it,
follow these steps:
The timeclock can be programmed to
switch all time zones to setback or frost
protection mode for a set number of
days – ideal for when you are going
away. To use the HOLIDAY function,
follow these steps:
1 Time zone 1: e.g. Ground Floor
2 Time zone 2: e.g. Bedrooms
3 Time zone 3: e.g. Guest rooms, etc.
1 From the main menu, press CLOCK.
2 Use the 6/5keys to set the hour.
3 Use the 6/5keys to set the minute.
4 Hot water time control
4Press DAY repeatedly to set the day
of the week.
Note:
5Press DONE to store.
Rooms are allocated to time zones
during installation.
1From the main menu, press
HOLIDAY.
2Select the number of days you are
going away for. The holiday will start
immediately, but will count tomorrow
as the first day.
3 To cancel the holiday early, reduce
the holiday days to 00 and press DONE.
Note: If a domestic water cylinder is out
of use for a number of days, a hygiene
purge should be performed before use.
NORMAL RUN MODE
SELECTING 5/2 OR 7 DAY
PROGRAMMING
In normal RUN mode, the timeclock
will display the current time. It can also
be set to show the status for a particular
time zone. To display the status of a
time zone, press ZONE 1 – ZONE 4.
This screen will be displayed until you
press DONE and return to the main
menu.
Each Time zone can be programmed
to work in 5/2 (Weekday/ Weekend)
or 7 DAY mode. To setup the required
mode, follow these steps:
1Press ZONE 1.
2Press DAY.
3Set 00 to work in 5/2 day mode.
4Set 01 to work in 7 day mode.
5Press DONE.
10
For expert advice call us on 01404 549770 or Freephone 0800 731 1976
ADJUSTING THE SWITCHING TIMES
MODE SELECT
BOOST FACILITY
Each time zone has 4 ON/OFF times.
Follow these steps to program the
switching times:
Each time zone can operate in 3 modes:
Each time zone has a boost facility
allowing you to turn it on for a number
of hours. This is ideal for when you
need to extend the time period but do
not wish to reprogram the time clock
settings.
1Select the time zone you wish to
program, for example ZONE 1.
2Press EDIT.
3If the time zone is operating in 5/2
day mode, you will see Mon,Tue,
Wed, Thu, Fri on the display.
If it is operating in 7 day mode, you
will see Mon.
4Press DAY to select the day to
program.
5You can now set the ON time by
using the 6/5keys.
AUTO: The time zone will work to the
programmed switching times.
OFF: The time zone will switch off
putting the thermostat into setback or
frost mode.
CONSTANT: The time zone will stay on.
To use the BOOST facility, follow these
steps:
To set the mode for the time zone,
follow these steps:
1Select the time zone you wish to
program, for example ZONE 1.
1Select the time zone you wish to
program, for example ZONE 1.
2Press BOOST.
2Repeatedly press MODE until the
desired mode is displayed.
3Press DONE to store.
3Enter the desired boost period (in
hours).
4Press DONE.
5The remaining boost time will be
displayed on-screen.
If fewer switching times are required
they can be ignored by setting to
--/-- using the 6/5keys.
6 To cancel the boost early, repeat the
steps above reducing the boost time
to 00.
6Press OFF, and set the OFF time.
7Press button for Time 2, Time 3 and
Time 4.
8Press DAY to programme the other
days, repeating from stage 5.
9Press DONE to store.
COPY FUNCTION
CLEANING
The timeclock has a copy function,
enabling you to copy switching times
from one time zone to another. To use
the COPY function, follow these steps:
Before cleaning the screen of the
timeclock, press SCREEN to disable
all functions for 15 seconds. While the
countdown timer is showing the screen
can be cleaned without activating any
functions.
1 Select the zone and press EDIT.
2Press COPY.
3Select each time zone you want to
copy to and press DONE.
For more information visit www.nu-heat.co.uk
11
General system checks
The expansion vessel and filling loop is
usually positioned near the boiler.
Adjust the temperature of the boiler water
by turning the boiler control thermostat.
SYSTEM PRESSURE
The majority of heating systems are
sealed and include an expansion vessel
which maintains the system pressure.
This red vessel would normally be
found positioned near to the boiler.
If you have a combination boiler or
system boiler the main pump and
expansion vessel will be inside the
boiler. The best way to identify this is
that the boiler will have a pressure
gauge on its panel.
You will need to check the system
pressure regularly as it is normal for
a system to lose a small amount of
pressure. The gauge should read
12
Never set the boiler water temperature
lower than the cylinder thermostat.
BOILER THERMOSTAT
approximately between 1 and 2 bar
depending on whether the system is
cold or hot.
The temperature of water generated by
your boiler is altered by adjusting the
boiler control thermostat dial.
If the pressure is below 1 bar, top the
pressure up to 1 bar by opening the
valve on the filling loop connected to
the red vessel (or boiler if no red vessel
is visible). Only top up when the system
is cold. If your system rapidly looses
pressure you need to consult a heating
engineer.
If you have a hot water cylinder it
is important that the boiler water
temperature is always at least 5˚C
above the temperature of your
cylinder thermostat.
If there is no red expansion vessel or
gauge on the boiler then your system is
not sealed but open vented and will be
topped up automatically by a feed tank
and ballcock in the loft.
For expert advice call us on 01404 549770 or Freephone 0800 731 1976
General sequence of operation
Every time heat is required in a room the following sequence is initiated:
If the heating is in an ON period and the room requires heating, the room
thermostat will call for heat:
1
A red LED light will appear on the
thermostat.
zone will open, indicated by the button
on top of the actuator head rising.
The floor pump, either on the
Optiflo manifold serving that zone,
or on the remote-mounted pump
module will be switched on.
The flow gauge on this circuit will
indicate flow and the flow pipe will
get warm.
The actuator on the Optiflo
manifold circuit connected to the
For standard systems with conventional
boilers/cylinders or combination boilers
the boiler and boiler pump are turned
on to supply and circulate heat.
Over a period of time as the room
comes up to temperature, the return
pipe will warm up as well.
1
MANIFOLD COMPONENTS
1
Flow gauges
2
Flow temperature gauge
3
Flow adjustment
4
Pressure gauge
5
Filling/drain off valve
6
Actuators
7
Manual air vent
8
Return temperature guage
9
Floor heating pump
(direct mounted)
10
Main isolating valve (return)
11
Main isolating valve (flow)
12
Temperature blending valve
2
4
3
9
5
1
1
3
3
6
6
6
7
10
8
12
5
Note: Pump may be mounted directly
or installed remotely.
11
For more information visit www.nu-heat.co.uk
13
Seasonal adjustments
Underfloor heating can be left active
all year round as it is thermostatically
controlled by the room temperature.
In warm weather it will simply not come on.
If you require to turn the heating off (for example when servicing) always use the
main heating isolation switch.
LEAVING THE PROPERTY
UNOCCUPIED IN WINTER
INSTANT HOT WATER AND HEATED
TOWEL RAIL
Rather than turning the heating system
off, it is possible to leave background
heating on as frost protection.
Hot water and heated towel rails will
be available all year round regardless
of your requirement for underfloor
heating (systems with EnergyPro hot
water loop).
Each room/zone can be set to frost
protection individually. Please refer
to the instructions (Leaving the Building
Unoccupied on page 8), which detail
how the thermostat can be put into
FROST PROTECTION mode.
14
For expert advice call us on 01404 549770 or Freephone 0800 731 1976
System adjustments
If additional heat is required in a selected
room or rooms the water flow rate(s)
serving these areas can be increased.
a
To do this:
When the system is operating, turn the
thermostat up in that room.
Identify from the pipe markings at the
manifold which actuator head serves
the zone you want to change.
Note: If the zones are not clearly
marked turn off all the other room
stats. The zone that is operating will be
shown by a raised button on the top of
the actuator (a) and the flow gauge will
indicate a flow reading (b).
b
Turn the flow gauge – anti-clockwise
for more flow, clockwise for less.
The red flow indicator will drop further
the greater the flow rate.
­­Note: Adjust a little at a time to suit
your requirements. Increasing the flow
to one zone may decrease the flow to
others. There is a limit to how much
extra flow can be achieved and if, after
adjusting one or several zones, further
action is required the flow temperature
can be increased.
Please note that the button can take up
Clockwiseto =3 minutes
defaultto seng
respond.
d1
c
To do this:With the system running note the
water flow temperature on the gauge
(c) on the top rail of the manifold. This
temperature can be increased (see d1
and d2 below).
Note: Adjust a little at a time to suit
your requirements.
Clockwise = default seng
d2
+/-
Press to accept
+/-
Remote pump module (d2)
To increase the temperature:
ush the button above the illuminated
1 P
display in and across to the right to
scroll to the temperature menu.
djust the temperature by pushing
2 A
the button to the left or right.
ress the button again to confirm
3 P
the change.
Direct-mounted pump module (d1)
To increase the temperature:
1 Turn the control head anticlockwise
For more information visit www.nu-heat.co.uk
15
ERP
ERP
Servicing requirements
ERP
|||
ERP
ENER
G
FICIENCY
EF
G
TIN
RA
Y
Y
FICIENCY
EF
The DS thermostat is rated as Class I under Section 5.2.1.2 Temperature control, of
EU Commission Delegated Regulation No. 811/2013.
ERP
Product support
For further information on the operation of your underfloor heating system and
troubleshooting help, please visit the Nu-Heat website at nu-heat.co.uk.
Online
www.nu-heat.co.uk
Follow us
@nuheatuk
See our videos
/nuheatuk
Freephone
0800 731 1976 or 01404 549770
Nu-Heat UK Ltd I Heathpark House I Devonshire Road I Heathpark Industrial Estate I Honiton I Devon EX14 1SD
ERP
Y
FICIENCY
EF
E
ERP
G
TIN
RA
Energy efficiency (ErP)
CLASS
|
ERP
ERP
FICIENCY
EF
ENER
G
ENER
G
CLASS
Y
G
TIN
RA
G
TIN
RA
D
G
TIN
RA
Please refer to General System Checks
(page 12) for further information.
Underfloor heating
Whilst there is no requirement for
annual servicing it is important that the
level of central heating inhibitor is
FICIENCY
sufficient
FICIENCYto protect the system.
EF
EF
Y
Y
ENER
G
Check the expansion vessel water
pressure as displayed on the gauge,
the pressure should normally be
between 1 bar and 2 bar depending
on whether the system is cold or hot.
ENER
G
ANNUALLY
ENER
G
MONTHLY
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising