Rehau BA Installation manual

REHAU INTELLIGENT FS/FC HEATING/COOLING CONTROLS
TECHNICAL & INSTALLATION MANUAL
www.rehau.co.uk
Building Solutions
Automotive
Industry
REHAU Intelligent Floor
Heating/Cooling Controls
Index
1.0 . . . . . . Principles of Underfloor Heating/Cooling. . . . . . . . . . . . . . . . . . . 8
1.1 . . . . . . Principle of UFH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2 . . . . . . Principle of UFC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.3 . . . . . . Flow Temperature Control. . . . . . . . . . . . . . . . . . . . . . . . . .10
1.3.1 . . . . . Variable Temperature (VT) System . . . . . . . . . . . . . . . . . . . . . .10
1.4 . . . . . . Zone Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
1.5 . . . . . . Set-Back Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.5.1 . . . . . Heating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.5.2 . . . . . Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.0 . . . . . . Flow Temperature Control. . . . . . . . . . . . . . . . . . . . . . . . .14
2.1 . . . . . . Safety Advice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.2 . . . . . . Required Components for Variable Temperature (VT) Mixing Options Heating/Cooling. . .15
2.3 . . . . . . Four Port Motorised Mixing Valve (MV) Heating/Cooling . . . . . . . . . . . . . .16
2.3.1 . . . . . Working Principle.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
2.4 . . . . . . Variable Temperature (VT) Mixing Option For Heating/Cooling . . . . . . . . . . . .19
2.5 .
2.5.1
2.5.2
2.5.3
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. Flow Temperature Safety Options.
. Dew Point Control. . . . . . .
. High Limit Sensor (HLS). . . . .
. High Limit Sensor Installation . .
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.20
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2.6 .
2.6.1
2.6.2
2.6.3
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. Zone Valves (ZV) . . . . . . . . .
. Working Principle (Heating) . . . . .
. Zone Valve Heating Installation. . . .
. Working Principle (Heating & Cooling) .
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.21
.21
.21
.23
3.0 . . . . . . REHAU Intelligent FH / C Zone Control System . . . . . . . . . . . . . . . .24
3.1 .
3.1.1
3.1.2
3.1.3
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. Components Overview. . . . . . . . . . . .
. Components Overview Heating. . . . . . . . .
. Additional Components Overview Heating/Cooling .
. Components Overview Wireless Sensors/Controllers
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.24
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.26
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3.2 . . . . . . Working Principle. . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
3.2.1 . . . . . Weather Compensation. . . . . . . . . . . . . . . . . . . . . . . . . . .30
3.2.2 . . . . . Required Components for Zone Control . . . . . . . . . . . . . . . . . . . .31
3
REHAU Intelligent Floor
Heating/Cooling Controls
Index
4.0 . . . . . . Control System First Fix. . . . . . . . . . . . . . . . . . . . . . . . . .32
4.1 . . . . . . Cables Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . .32
4.2 .
4.2.1
4.2.2
4.2.3
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. Positioning the FS and FC Controllers Room Sensors and Remote Air/Floor Sensors
. Location of Room Humidity Sensor and Air Sensor . . . . . . . . . . . . .
. Positioning the Remote Air Sensor. . . . . . . . . . . . . . . . . . . .
. Positioning the Floor Sensors. . . . . . . . . . . . . . . . . . . . . .
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.33
.33
.33
.33
4.3 . . . . . . Wireless Sensors/Controllers Set Up/Radio Frequency (RF) . . . . . . . . . . . . .34
4.3.1 . . . . . Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
4.3.2 . . . . . Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
5.0 . . . . . . Control System Second Fix . . . . . . . . . . . . . . . . . . . . . . . .36
4
5.1 .
5.1.1
5.1.2
5.1.3
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. REHAU FS/FC Control Units . . . . . . . . . . . . . . . . . . . . . .
. Location of the REHAU FS/FC Controller . . . . . . . . . . . . . . . . .
. Fixing the REHAU FS/FC Unit. . . . . . . . . . . . . . . . . . . . . .
. Systems Utilising Weather Compensation with Multiple Controllers (See section 10)
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.36
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5.2 .
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.2.6
5.2.7
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. Mains Voltage (230v) Electrical Connection to the FS/FC Controller.
. Mains Voltage (230v) Electrical Connection to the FS/FC Controller.
. Wiring High Limit Sensor . . . . . . . . . . . . . . . . .
. Boiler Connection. . . . . . . . . . . . . . . . . . . .
. X-Relay Output. . . . . . . . . . . . . . . . . . . . .
. Connecting the Cooling Output to the K MOD . . . . . . . . .
. Connecting the Heating/Cooling Zone Valves . . . . . . . . .
. Pump Outputs . . . . . . . . . . . . . . . . . . . . .
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.37
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5.3 .
5.3.1
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.3.7
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. Non Mains Voltage (24v, 5v, & Volt Free) Electrical Connection to the FS/FC Controller.
. Connecting the Add On, Extension Module . . . . . . . . . . . . . . . . .
. Connecting the Room Sensors to the Controller Bus. . . . . . . . . . . . . .
. Connecting the Thermal Actuators (TH 1 - TH 8) . . . . . . . . . . . . . . .
. External Switch/Timer . . . . . . . . . . . . . . . . . . . . . . . . .
. Connecting 4-Port Mixing Valve Actuator . . . . . . . . . . . . . . . . . .
. Connecting the Mixed Water Flow Temperature Sensor (Limit Sensor). . . . . . .
. Connecting REHAU OC Sensor (Outside Temperature Sensor). . . . . . . . . .
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.41
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5.4 .
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
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. Room Sensors Internal Connections. . . .
. Connect the Wiring . . . . . . . . . .
. Remote Air Sensor Option (TM Sensor Only).
. Connecting the Remote Air Sensor . . . .
. Floor Sensor Option (TD Sensor Only) . . .
. Connecting the Floor Sensor. . . . . . .
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6.0 . . . . . . System Start Up and Operating Instructions for Heating & Cooling. . . . . . . .46
6.1 . . . . . . Mixing Valve Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . .46
6.2 . . . . . . Setting the Heated/Cooled Zones (Channel Numbers) . . . . . . . . . . . . . . .47
6.3 . . . . . . Setting Up the REHAU FS/FC Controller (Heating). . . . . . . . . . . . . . . . .48
6.4 . . . . . . Weather Compensation (Heating). . . . . . . . . . . . . . . . . . . . . . .51
6.5 . . . . . . Setting Up the FC Controller (Cooling) . . . . . . . . . . . . . . . . . . . . .52
6.5.1 . . . . . Setting Up Dehumidifier on the Master Connection . . . . . . . . . . . . . . . .54
7.0 . . . . . . Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
7.1 . . . . . . Pre-commissioning Requirements . . . . . . . . . . . . . . . . . . . . . .55
7.2 . . . . . . Automatic Initial Heating System Warm Up . . . . . . . . . . . . . . . . . . .55
7.3 . . . . . . Initial System Start Up for Cooling Systems . . . . . . . . . . . . . . . . . . .56
7.4 . . . . . . The Commissioning Team. . . . . . . . . . . . . . . . . . . . . . . . . .56
8.0 . . . . . . CT Set Up Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
8.1 . . . . . . Programmable Room Sensor, Domestic Hot Water, Radiator and Two Stage Controller. . .57
9.0 . . . . . . Domestic Hot Water (DHW), Radiators and Two Stage Controller. . . . . . . . .66
9.1 . . . . . . Domestic Hot Water . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
9.2 . . . . . . Radiators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
9.3 . . . . . . Two Stage Room Temperature Controller. . . . . . . . . . . . . . . . . . . .68
10.0. . . . . . Special Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
10.1. . . . . . Network Multiple Controllers. . . . . . . . . . . . . . . . . . . . . . . . .69
10.2. . . . . . Dip Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
10.3. . . . . . Holiday Override Function. . . . . . . . . . . . . . . . . . . . . . . . . .71
10.4. . . . . . Checking Control System Operation. . . . . . . . . . . . . . . . . . . . . .72
5
REHAU Intelligent Floor
Heating/Cooling Controls
Index
11.0. . . . . . Troubleshooting and Error/Fault Messages. . . . . . . . . . . . . . . . . .73
11.1. . . . . . Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
11.2. .
11.2.1.
11.2.2.
11.2.3.
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. Error/Fault Messages . . .
. Flashing Power LED (green) .
. Flashing Output LED (red). .
. Voltage Measurements. . .
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.75
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12.0. . . . . . Resets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
12.1. . . . . . Replacing Faulty Sensor/Controller . . . . . . . . . . . . . . . . . . . . . .77
13.0. . . . . . Sensor Failure/Valve and Pump Exercise. . . . . . . . . . . . . . . . . . .78
13.1. . . . . . Sensors/Controller Failure. . . . . . . . . . . . . . . . . . . . . . . . . .78
13.2. . . . . . Emergency Program for Supply Limit Sensor . . . . . . . . . . . . . . . . . .78
13.3. . . . . . Valve and Pump Exercise. . . . . . . . . . . . . . . . . . . . . . . . . .78
14.0. . . . . . Wiring Schematic - Next Generation . . . . . . . . . . . . . . . . . . . .79
6
If a floor heating system is added to an existing heating or hot water system, containing mild steel
pipes, a strainer must be fitted straight after the branch off.
All REHAU control systems must be installed:
- By a competent person
- In accordance with the latest issue of instructions supplied
with each component
- According to the current IEE wiring regulations laid out in BS 7671 and National Valid regulations and in
compliance with the ordinances stipulated by local power authorities.
Diagram/DWG Legend
AC
AV
BPV
BV
CP
CS
CT2
OS
CYL
DHWS
EV
FM
HLS
IV
LSV
Actuator
Air Vent
Bypass Valve
Balancing Valve
Circulating Pump
Cylinder Sensor
Programmable Room Sensor
Outside Sensor
Cylinder
Domestic Hot Water System
Expansion Vessel
Flow Meter
High Temperature Limit Stat
Isolating Valve
Radiator Lock Shield Valve
VT
Variable Temperature
MV
Motor Operated Mixing Valve
RS
Room Sensor
BC
Boiler Controls
SP
System Pump
TA
Standard Sensor
TDRoom Sensor with identical features of
TM, along with floor sensor
TIV
Thermostatic Inlet Valve
TMRoom Sensor with four modes Auto, Day,
Night and Frost protection
TMV Thermostatic Mixing Valve
TP
Tamper Resistant Sensor
TRV Thermostatic Radiator Valve
ZV
2-port Zone Valve
Technical Data
Power Supply
230V AC +10/-15%, 50 HZ
Max load pumps and Thermal actuators
4A + 35VA
Boiler relay
Volt free signal. Max 4A
Main pump (Volt free relay)
Volt free signal. Max 4A
Secondary pump
230V AC, 50Hz Max. 4A
Thermal actuators
Max. 10VA on each output. Max. 35VA in total
Max. 10VA per output. Max. 35VA in total
Optional External Switch (Timer) for night setback
Open terminals for night set back and closed terminals for
day operation
Room sensor Bus 2 wire low voltage
5v
Application sensor and Limit sensor
NTC type ETF-1899A for water temperature
Control signal for mixing valve actuator
0-10V DC
Power supply for mixing valve actuator
24V AC. Max 6VA
7
1.0
Principles of Underfloor Heating/Cooling
1.1
Principle of UFH
Thermal Comfort
REHAU underfloor heating system operates on
the basis of low surface temperatures and even
temperature distribution across the whole floor
with comfortable radiant energy. In contrast to
other heating systems the radiative equilibrium
between occupants and the surfaces in a room
is established and an optimum level of comfort
is achieved.
Due to the high heat output, even at low flow
temperatures, the REHAU sub-surface heating
systems are ideal for use in combination with gas
condensing boilers, ground source heat pumps
or thermal solar power systems.
Energy-saving
Due to the REHAU underfloor heating systems’ high
proportion of radiant energy, comfort conditions can
be achieved with lower room temperatures typically
1ºC to 2ºC. This facilitates a typical annual energy
savings of 6% to 12%.
Environmentally friendly
Good for allergy sufferers
Through the REHAU underfloor heating
systems’ low proportion of convective energy
only a minimal thermal vortex is formed. Dust
circulation and the carbonising of dust are thus a
thing of the past. This protects the airways - not
just those of allergy sufferers.
Visually attractive rooms without radiators
The REHAU underfloor heating / cooling systems
- Allow the user to be free with their
interior design
-G
ives the architect the planning freedom
- Totally eliminates the risk of injury and burning
from surface mounted heat emitters hence totally
suitable for nurses schools, hospitals, clinics etc
Ž
42,
Ž
- L ower maintenance costs.
Ž
Operative Temperature according to CIBSE*
Ž
Winter
Summer
In living spaces and lounges
22-23ºC
23-25ºC
In bathrooms
20-22ºC
23-25ºC
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Ž
* CIBSE Guide A, Environmental Design
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Ž
Room air temperatures according to
BS EN 12831
- In living spaces and lounges: 20ºC
Ž
Ž
Ž
Ž Ž
Ž
Red - warm uncomfortable
Yellow - still comfortable
Ž
Ž Ž
ŽŽ
Orange - comfortable
Blue - cold uncomfortable
4&
Ž
- In
bathrooms: 24ºC.
1. Thermal comfort, dependent on the room air temperature TRL and the temperature of the surfaces
enclosing the room TF
Surface temperatures
Maximum permissible surface floor temperatures
are to be observed for the surface as a surface
in direct contact with people for medical and
physiological reasons.
- Occupied zone 29ºC
Exemplary temperature profiles in heated rooms
- P eripheral zone 35ºC (generally situated in the
floor near large glazed areas).
Ž#
2. Radiator heating
8
Ž#
4. Sub-surface heating
Ž#
3. Ideal heat distribution
1.0
Principles of Underfloor Heating/Cooling
1.2
Principle of UFC
Advantages of a Underfloor
Cooling System
- High level of comfort
- Preserves resources
Classic air conditioning
systems
Traditional air conditioning
systems overcome the cooling
loads that occur by changing
the air, with the following
negative effects:
-D
raughts
- Unrestricted interior design.
-H
igh room air speeds
- Draughts do not occur
- Low investment costs
- Low annual costs
Thermal comfort
The thermal comfort for
one person in a room is
determined by:
- The person’s activity
Radiation
Min 50%
Evaporation
<30%
32ºC
20ºC
- Cold
supply air temperatures
- High
sound level.
Convection
<10%
20ºC
Heat distribution
<2-5%
3. The human being’s heat balance
- Air humidity
This can often result in
uncomfortable air conditions for
the user, also referred to as sick
building syndrome.
Economic disadvantages of
traditional air conditioning units:
-H
igh investment costs
- Surface temperatures.
-H
igh annual running costs.
The heat output of the human
body occurs via main three
mechanisms:
- Radiation
Cooling capacity
The standard cooling capacity
of the REHAU underfloor cooling
system is 50W/m2 in accordance
with DIN 4715-1.
The performance estimation was
carried out with:
- RAUFIX system
Influencing factors on the cooling capacity
The sub-surface cooling system’s maximum achievable output is
dependent upon:
- floor covering
- Distance between pipes 10cm
- pipe spacing
- RAUTHERM S 16 x 1.5mm
- pipe dimensions
- Coolant temperature 10K
- floor construction
- Temperature spread 2K.
- system
- The person’s clothes
- Air temperature
- Air speed
- Evaporation
- Convection.
The human body experiences
the greatest level of well
being if it can regulate at
least 50% of its heat output
through radiation.
With the REHAU underfloor
cooling system the energy
exchange between people
and cooling surface occurs
across large areas and
predominantly through
radiation and thus provides
the optimum conditions
for a comfortable room
atmosphere.
0.5m/s
4%-0
4. Air temperatures and air speeds with pipe underfloor cooling
- heat gains
Under practical conditions, with
- surface temperature of 19-20ºC
- room temperature of 26ºC
values of 35-40 W/m2 can be
obtained.
However, each of the factors affects the cooling capacity to a different
degree.
The floor covering and pipe spacing have a substantial impact on the
output of the cooling system.
It is recommended that only stone, tile or slate type floor or other low
resistivity floor coverings are used to maximise the cooling output
9
1.0
Principles of Underfloor Heating/Cooling
1.3
Flow Temperature Control
CT2/HW
Junction Box
FS/FC Controller
CT2/R
HWS
Hot Water Sensor
HWS
CT2/R
CT2/HW
SV
ZV
HLS
AV
TS
CP
BPV
SV
PV
CS
RS
OC
LSV
TRV
Hot Water Supply
Radiator Controller
Domestic Hot Water Controller
Safety Valve
Zone Valve
High temperature Limit Thermostat
Air Vent
Temperature semsor (Flow)
Circulating Pump
By pass Valve
Safety Valve
Pressure Vessel
Cylinder Sensor
Room Sensor
Outside Sensor
Lockshield Valve
Thermostatic Radiator Valve
RS
Hot Water
Cylinder
TRV
AV
Radiator
OC
LSV
CP
HLS
TS
Manifold Flow Header
4 Port Mxing Valve
Manifold Flow Header
ZV
PV
SV
Boiler
CP
ZV
BPV
5. ‘S’ plan integration of variable temperature weather compensated heating system
Heating
A boiler for a conventional combined radiator and domestic hot water
system (DHWS) provides water with a flow temperature of around 80ºC.
Water is pumped by a Main (system) pump to the hot water cylinder and
to the radiators, where it loses temperature. On the return, the water
temperature stays at around 69ºC. Current standards and regulations
for floor heating state that the surface temperature of a floor must not
exceed 29ºC (in perimeter zones and bathrooms 35ºC). Before water
can circulate through the REHAU floor heating circuit, it must be mixed
with cooler return water to a temperature of between 32ºC - 55ºC. To
achieve this a mixing valve is used.
It mixes the 80ºC water from the boiler with cooler water from the return
of the floor heating circuits.
1.3.1 Variable Temperature (VT) System
Heating mode
When used with a building management system (BMS) or a
computerised controller linked to an external temperature sensor, the
system will always choose the optimal flow temperature in relation
to the actual heat demand, based on the current weather. A variable
temperature system requires external and flow temperature sensors,
FS or FC controller to regulate a motorised mixing valve.
Cooling
The cooling system will also require mixing if comfort conditions
are to be achieved. Mixing is also required to prevent the formation
of condensation to the building fabric. For the purposes of cooling,
installation of a 4-port mixer is required.
Cooling mode
In cooling mode the water temperature supplied by the chiller
unit will be mixed to achieve the optimum water temperature for
the cooling system. This mixing will also prevent the formation of
surface moisture to cool surfaces should high humidity be detected.
If the humidity of the area being monitored achieves critical
conditions, the mixing valve will close the cooling circuits.
10
CT2/HW
Junction Box
HWS
CT2/R
CT2/HW
SV
ZV
HLS
AV
TS
CP
BPV
SV
PV
CS
RS
HS
OC
LSV
TRV
Hot Water Supply
Radiator Controller
Domestic Hot Water Controller
Safety Valve
Zone Valve
High temperature Limit Thermostat
Air Vent
Temperature semsor (Flow)
Circulating Pump
By pass Valve
Safety Valve
Pressure Vessel
Cylinder Sensor
Room Sensor
Humidity Sensor
Outside Sensor
Lockshield Valve
Thermostatic Radiator Valve
Cooling Module
(K MOD)
FC Controller
CT2/ R
HWS
Hot Water Sensor
RS
Hot Water
Cylinder
AV
Radiator
TRV
HS
LSV
OC
CP
HLS
TS
Manifold Flow Header
Manifold Return Header
4 Port Mxing Valve
ZV
PV
CP
Boiler
ZV
ZV
CP
ZV
Chiller
BPV
ZV
ZV
2 Port power open / close zone valves
2 valves shown to allow total system seperation
5a. ‘S’ Plan intergration of variable temperature weather compensated heating cooling system
FC Controller
HLS
AV
TS
CP
RS
HS
OC
High Temperature Limit Thermostat
Air Vent
Temperature sensor (Flow)
Circulating Pump
Room Sensor
Humidity Sensor
Outside Sensor
RS
AV
CP
HLS
HS
OC
TS
Manifold Flow Header
Manifold Return Reader
Buffer
Tank
4 Port Mxing
Valve
Reversible
Heat Pump
5b. UFH with a reversible Heat Pump
Please note fixed flow temperature regulation is not suitable
for use with FS and FC controllers
11
1.0
Principles of Underfloor Heating/Cooling
1.4
Zone Control
UFH/C Control centre
IV
IV
UFH - Flow
HLS
CP
IV
AC
AC
AC
AC
HS
UFH - Manifold
UFH - Return
MOV
RS
RS
RS
RS
RS - Room Sensor
HS - Humidity Sensor (only in cooling mode)
6. Individual zone control with FH
The REHAU INTELLIGENT zone control system is a simple electronic
control system that has been specifically designed to
give optimum and accurate control of Floor Heating systems.
Heating/Cooling circuits are connected to a central manifold. Each
circuit will have a thermoelectric actuator (AC) on the manifold
operating the return valve for the circuit.
In heating mode
The heat output in each room is controlled by a room sensor (RS),
which continuously compares the required room temperature with
the actual room temperature. If the room temperature is too low, it
will signal the actuator (AC) to open the return valve of the circuit and
allow warm water to flow through it. (As shown in Fig. 6).
12
In cooling mode
The cooling output in each room is controlled by a room sensor (RS),
which continuously compares the required room temperature with
the actual room temperature. If the room temperature is too high,
it will signal the actuator (AC) to open the return valve of the circuit
and allow cold water to flow through it. (As shown in Fig. 6).
Zone controls give control over local/room temperature by
adjusting the amount of water circulating within individual
circuits/ zones.
Adjustments are made dependent upon:
- Continuous temperature readings from each room sensor (RS)
- The end user settings such as room temperature set point and
programmed night set-back periods on the timer
1.0
PRInCIPlEs oF UndERFlooR HEAtIng/CoolIng
1.5
sEt-bACk modE
1.5.1 Heating
A floor heating system switches into set-back
mode instead of switching off completely. This
means when you leave the house or at night, the
system allows the internal temperature to drop to
a lower level. Depending on the installed system
components, this reduced temperature level can
be set for each room individually or for a group
of rooms.
1.5.2 Cooling
Like the heating system the cooling system will also
function in set-back mode. Only in cooling mode the
set-back temperatures are allowed to increase. The
amount of cooling set-back must be carefully chosen
to enable the cooling system to respond efficiently
when cooling demand is required.
The pre-set temperature for this mode should be
carefully selected, because if the temperature is
set too low the system will require a large initial
input of energy coupled with a long response
time to raise the temperature again.
The set back mode enables the system to
respond quickly and efficiently when heat is
required. It can also make it possible to use
a smaller boiler compared to a conventional
heating system.
13
2.0
Flow Temperature Control
2.1
Safety Advice
Authorised specialists
Installation, commissioning, maintenance and repairs of all electrical
control components shall only be carried out by trained, competent and
qualified specialists in accordance with the national, valid regulations
(Health & Safety, Wiring Regulations, etc) and in compliance with the
ordinances stipulated by the local power authorities.
Sources of danger
Before opening any component always ensure the system is switched
OFF at the main heating system isolation switch.
To clean the components use a dry towel only.
Never clean any units with water or other solvents
(e.g. spirit, acetone).
Never touch any live component with wet hands.
14
Designated application
All equipment explained in the following sections is intended for
mixing flow and return water to a suitable mixed water temperature
for use with wet Floor Heating/Cooling Systems.
Modifications or changes to this equipment are only permitted with
the manufacturer’s approval. The manufacturer does not accept
liability for damages arising from misusing the equipment.
Fixed Flow Temperature Systems (FFT) cannot be used with
REHAU FS and FC Controllers.
2.0
Flow Temperature Control
2.2
Required Components for Variable Temperature (VT)
Mixing Options Heating/Cooling
Component
REHAU
Art. No.
Variable Temperature
HEATING
Variable Temperature
HEATING / COOLING
4-port Mixing Valve up to 12kW (¾" dia BSP, Kv 4)
225118
1x
1x
4-port Mixing Valve up to 24kW (1" dia BSP, Kv 8)
225119
1x
1x
4-port Mixing Valve up to 55kW (1¼" dia BSP, Kv 18)
225123
1x
1x
4-port Mixing Valve Actuator
225124
1x
1x
Male Iron to copper adapters
Not supplied
4x
4x
Circulating Pump with 2x isolating valves
Not supplied
1x
1x
Manifold Isolating Valves
Incl. with Manifold
2x
2x
2-port Zone Valve (22mm) for outputs up to 12kW (Heating only)
230426
1x
No
2-port Zone Valve (28mm) for outputs 12kW to 18kW
230427
1x
4x*
High Limit Sensor
225125
1x
1x
* 4 valves are required to provide safety protection to prevent any cross flow within the 2 systems should the
boiler and the chiller operating at the same time and one valve fails i.e. DHW and chiller operation in summer
Only 1 zone valve required in conjunction with heat pumps
15
2.0
Flow tEmPERAtURE ContRol
2.3
FoUR PoRt motoRIsEd mIxIng vAlvE (mv) HEAtIng/CoolIng
- Suitable for all Heating / Cooling
applications
- Use the correct size of mixing valve
(according to required heat output:
12kW / 24kW or 55kW)
- The secondary circulating pump only
circulates the warm / cold water through
the circuits. Separate main system pumps
are needed to supply the mixing valve with
hot / cold water from the boiler / chiller
2.3.1 Working Principle
The high or low temperature main system flow enters the 4-port mixing
valve at 70ºC+ heating, 6°C cooling and is mixed with the cooler /
warmer return water from the circuits as required.
On Cooling systems, all pipework to the manifolds will require
close cell insulation to prevent condensation forming on the
pipe walls and dripping onto other surfaces.
The secondary circulating pump (CP) circulates water at the required
design flow temperature through the circuits via the manifold flow
header every time there is a demand signal from one of the room
sensors. On the return from the circuits water is taken as required, and
mixed with the main system flow. The remaining water is then sent back
to the boiler.
This type of valve never blocks one port completely, but either separates
the primary side and the manifold side in two individual loops or allows
the water of both sides to mix to the required temperature.
16
A temperature sensor strapped to the flow (at a recommended
0.3m after the circulating pump) constantly reads the current water
temperature back to the central controller. This controller compares
the reading to the desired calculated temperature based on its preset heating curve and the current outside temperature.
In this way the controller always tries to achieve the optimum flow
temperature with regards to energy consumption.
If the flow temperature falls below the calculated temperature, the
controller opens the motorised mixing valve (MV) to allow more hot
water from the main system to mix with the return water from the
underfloor circuits. If the flow temperature exceeds the desired level,
the valve is closed to re-circulate more of the return water into the
underfloor heating.
If there is a demand signal from any of the room sensors, water is
always circulating on the primary side of the valve and is available
immediately at the mixing valve.
This will result in a quick response from the Heating / Cooling
system to sudden increases in heating /cooling demand.
Required Components
Qty
Supplied
by REHAU
Mixing Valve Actuator
1x
Yes
Male iron to copper adapters
4x
No
Circulating Pump (CP)
1x
No
Isolating Valve (IV) of correct size
4x
2x (with manifolds)
Central FS/FC controller with sensors for flow and outside temperature
(see subsequent sections for more details on installation)
1x
Yes
High Limit Sensor
1x
Yes
Boiler Flow
UFH Flow
0
Boiler Flow
0
10
UFH Return
Boiler Return
UFH Flow
10
UFH Return
UFH Return
Boiler Return
10
Boiler Return
UFH Return
10
Boiler Flow
0
Boiler Return
0
UFH Flow
Boiler Flow
UFH Flow
7. Typical pipework orientation
Fitting
(always read and follow instructions supplied with components)
- F it one male iron to copper adapter into each of the four ports making sure they are properly sealed
- U sing two adjacent ports connect one to the boiler flow and one to the boiler return
-C
onnect the port opposite the boiler (return) to the inlet side of the mixed water flow via the circulating
pump and the 2-port zone valve
-C
onnect the remaining port FH return to the manifold return header via the isolating valve
- Fit the secondary circulating pump (CP) using isolation valves on both ports of the pump making sure the
pump inlet is connected to 2-port zone valve via pipework and the pump outlet to the flow header of the
floor heating manifold
- The mixing valve actuator is supplied with a separate leaflet giving instructions on how to fit it. These
instructions must be followed making sure the actuator is positioned correctly on the valve body.
17
2.0
Flow Temperature Control
2.3
FOUR Port Motorised Mixing Valve (MV) Heating/Cooling
A. DIRECTION MARKER
E. MANUAL BUTTON
AUTO
PLAN VIEW
OF ACTUATOR - F
B. ACTUATOR DIAL
C. ACTUATOR SHAFT
D. FRONT COVER
JP1
JP2
JP3
JP4
JP5
F. THE ACTUATOR
G. ADAPTOR
H. ANTI ROTATION STUD
J. VALVE SPINDLE
JP1
Y-SIGNAL
JP2
END POSITION
JP3
JP4
2-10VDC
ONLY USED WITH
2-10VDC SIGNAL
SPEED
DIRECTION OF DRIVE
0-10VDC
80 SECS
ANTI CLOCKWISE
150 SECS
CLOCKWISE
K. VALVE PLATE
L. VALVE BODY
MAN
If the valve body (L) has been installed with
the ‘0’ marking on the valve plate (K) requiring
the need for anti-clockwise drive to open
to the 10v (fully open position) then remove
the actuator dial (B) and the actuator front
cover (D) and remove the jumper JP4 from its
position. Replace the jumper JP4 to the right
so as to cover just 1 of the pins the actuator
will now drive fully clockwise and take up the
opposite starting position (‘0’ or OFF position).
Also remove the direction marker (A) from the
actuator knob and reverse this to conform to
the change in rotation. Replace the front cover.
WITH 10V SIGNAL
JP5
ICSP TM
8. Variable temperature wiring
NOT USED
ALWAYS
Ensure that the D flat side of the spindle faces
‘0’ on the valve plate. Take the BLACK adaptor
(G) with the RED V (If a 4-port valve is used
the white adaptor is not used). Place this on
the valve spindle (J) with the V pointing to ‘0’
Now place the actuator onto the adaptor (G)
ensuring the anti rotation stud (H) on the valve
body locates into the slot on the reverse of the
actuator. The stud should be located in either of
the holes on the valve to suit the position of the
actuator.
Locate the fixing screw in the actuator shaft (C)
into the valve spindle (J) and tighten. Connect
the BLACK wire to the terminal in the FS/FC
controller, and replace the actuator dial. The
valve / actuator combination is now ready for
use. When 0 – 10v power is supplied from
the controller the actuator will drive to open
the valve to supply mixed water to the heating
system (as shown in Fig. 8).
18
2.0 Flow Temperature Control
2.4
Variable Temperature (VT) Mixing Option for Heating/Cooling
Technical Data Mixing Valve (4 Port)
For up to 12kW:
Dimensions
Kv-value
Body
Internal brass components
Pipe Connection
: 80mm x 80mm x 80mm (H x W x D)*
:4
: Cast gunmetal
: DZR brass
: ¾" BSP Female
For up to 24kW:
Dimensions
Kv-value
Body
Internal brass components
Pipe Connection
: 90mm x 88mm x 88mm (H x W x D)*
:8
: Cast gunmetal
: DZR brass
: 1" BSP Female
For up to 55kW:
Dimensions
Kv-value
Body
Internal brass components
Pipe Connection
: 90mm x 85mm x 85mm (H x W x D)*
: 18
: Cast gunmetal
: DZR brass
: 1¼" BSP Female
Valve Actuator:
Dimensions
Speed / Opening time
Opening Direction
Body
: 130mm x 95mm x 43mm (H x W x D)*
: 80 sec or 150 sec (jumper setting JP3)
: clockwise or anticlockwise (jumper setting JP4)
: polymer
Connection of mixing valve to Cu pipe work & manifold
Mixing valve
Connection to Cu pipe work
Connection to manifold
¾"
4 x ¾" x 22mm Male Iron
to Cu adapter
2 *1" x 22mm Male Iron
to Cu adapter
1"
4 x 1" x 28mm Male Iron
to Cu adapter
2 *1" x 28mm Male Iron
to Cu adapter
1¼"
4 x 1¼" x 32mm Male Iron
to Cu adapter
Would not be connected
directly to manifold
Valve* Kv
(Size)
Flowrates [l/s] at
4 (¾")
0.294
10
12.31
8 (1")
0.588
10
24.61
18 ( ¼")
1.32
10
55.26
1
p 7kPa
T [K]
Q [kW]
*All dimensions are approximations.
19
2.0
Flow tEmPERAtURE ContRol
2.5
Flow tEmPERAtURE sAFEty oPtIons
TMV
Fitting
ZV
(always read and follow instructions
supplied
IV
IV
UFH - Flow
HLS
with components)
UFH - Manifold
CP
AC
IV
- The high limit sensor (HLS) must be fitted after
the circulating pump
(CP) and before
UFH - Return
the manifold flow header. It should also be fitted at least 0.3m to 0.5m after the
mixing valve.
2.5.3 High Limit Sensor Installation
Required Components
Qty
Supplied
by REHAU
High limit sensor
1x
Yes
Recommended position for HLS
IV
IV
HLS
CP
TS
UFH - Flow
UFH - Manifold
AC
IV
9a. High Limit Sensor
UFH - Return
MV
9b. Recommended Position of HLS (4-port) valve
High Limit Zone Valve
This function is used where an additional protection is required to prevent boiler water
entering the underfloor system, when the system is off or when the supply water
exceeds 65 C. An additional sensor (ETF-1899A) and a zone valve is connected as per
attached Fig.
FS/FC Controller (Main Control)
UNIT
NUMBER (1-9)
STRING
NUMBER (1-F)
DIP SWITCHES
0
2.5.1 Dew Point Control
The dew point control of the system is performed
by the Heating / Cooling controllers coupled with
the Humidity sensors positioned within the index
rooms (section 4.2.1). The controller will calculate
the dew point temperature based on the index room
temperature and the % of relative humidity within the
index room. If the system has more than one humidity
sensor installed within the control system then the
Heating / Cooling controller will operate to the worst
case temperature and humidity conditions. If the water
temperature falls below the dewpoint, dehumidifier
could be enabled (refer to Section 6.5.1, see page 54).
DIP SWITCH
ON
OFF
L
L
N
2
N
L
N
6
N
L
7
N
L
8
N
L
N
DISPLAY
SUPPLY
SENSOR
L
5
L
6
N
L
7
N
L
8
N
L
N
EXT.
SWITCH
I
O
N
THERMOSTAT BUS
+
+
+
+
Y
X
OFF
+
LINK
Working Principle
The high limit sensor (HLS) monitors the mixed flow
temperature.
This is a safety device, which should be set to a
temperature of 15ºC above the max. design flow
temperature. In the case of a system malfunction
and the max. design flow temperature being
exceeded, the high limit sensor (HLS) switches off
the secondary circulating pump (CP), and cuts the
power to the zone valve. With the zone valve closed
and the circulating pump stopped, no hot water
can enter the floor heating circuits.
20
SUPPLY
230VAC
L N
L
N
E
BOILER
B1 B2
X-RELAY SEC. PUMP
C1 C2 230VAC
L N
GREEN/YELLOW
FLOW WATER
TEMPERATURE SENSOR
APP
SENSOR
Ensure that DIP 5 is turned on and
DIP 6 is turned off to enable the
function of high limit zone valve
TO BE STRAPPED ON THE PIPE WORK (FLOW) AFTER THE ZONE VALVE
BROWN
BLUE
1 2 3 4 5 6 7 8
MIXING VALVE 24V AC
THERMOSTAT BUS
APP
SENSOR
MIXING VALVE
0 - 10V
X - RELAY
1
230VAC
THERMAL ACTUATORS
3
4
L
N
L
N
5
L
T
C2
3
4
L
N
L
N
THERMAL ACTUATORS
T
C1
N
N
T
L
BOILER
B1 B2
L
T
SUPPLY
230VAC
2
N
T
1
L
2.5.2 High Limit Sensor (HLS)
ON
1 2 3 4 5 6 7 8
L
N
ZONE VALVE
E
10. Connections for separate high limitation to the Master Controller
2.0 Flow tEmPERAtURE ContRol
2.6
ZonE vAlvEs (Zv)
2.6.2 Zone Valve Heating Installation
Required Components
Qty
Supplied
by REHAU
2 - port Zone Valve of correct size (230V)
1x
Yes
4 Port Mixing Valve
Compact Mixer Unit
IV
BV
HLS
MV Mixing Valve
CP
AC
IV
Isolating Valve
UFH - Return
TS Temperature Sensor
ZV 2-port Zone Valve
UFH - Manifold
HLS High Temperature Limit Stat
UFH - Flow
ZV
TIV
IV
HLS
ZV
CP
TS
IV
UFH - Flow
AC
UFH - Manifold
UFH - Return
MV
3 Port Mixing Valve
11. Locations of zone valve: Compact mixer, 3-port valve, 4-port valve (Heating only)
ZV
TMV
IV
IV
HLS
IV
2.6.1 Working Principle (HEATING)
The 2-port zone valve (ZV) has a dual function:
- To separate the floor heating system
hydraulically from other systems supplied by
the same heat source, such as the domestic
hot water system (DHWS) or radiators
CP
- Close down the flow of hot water from the
boiler in case of a boiler malfunctioning.
The 2-port zone valve (ZV) makes it possible to
integrate the floor heating with the other systems
by employing the 'S- Plan’ configuration, which is
well established in the heating industry.
Only when there is a demand signal from any
of the room sensors will the zone valve be
open and allow warm water to enter the floor
heating circuits.
UFH - Flow
Data UFH - Manifold
Size
: 22mm or 28mm
Overall Dimensions
: 120mm x 60mm x 95mm (H x W x L)*
Voltage Rating
: 230V AC, 50Hz Switch Rating : 2.2A
Switch Type
: Single Pole Single Throw (SPST) 22mm
Single Pole Double Throw (SPDT) 28mm
Power consumption
: 6W
Timings (Nominal)
: ON : 12 seconds: under power
OFF: 6 seconds: under spring return
Ambient temperature range
: +50ºC maximum
Flow temperature
: +5ºC to +88ºC
Max pressure
: 0.55 bar differential for close off 8.6 bar static
Auxiliary switch
: 2.2A at 220/240V AC at 50Hz
Flow Direction
: As per Arrow on valve body
Electrical Connections
: 1m Flying lead (heat resisting cable)
AC
UFH - Return
In combination with the high limit sensor, the
valve provides additional safety in case the water
supply temperature exceeds a pre-set limit. If the
high limit sensor cuts the power to the zone valve
motor, the in-built spring closes the valve and
creates a hydraulic barrier. This means the boiler
pump or any other pump can no longer inject
water into the floor heating system.
21
2.0
Flow Temperature Control
2.6
Zone Valves (ZV)
Zone Valve wiring connections
for Volt Free boiler Switching
Grey wire should be taken
to the connector of the volt
free supply and connected
PL
N
L1
Switch Live
To Boiler
SUPPLY
230VAC
L N
BOILER
B1 B2
N
L2
Wires to HLS
Wires to Pump
and Zone Valve
FS/FC Controller (Main Control)
X-Relay SEC. PUMP
VOLT FREE 230VAC
L N L N
L1
L2
Wires to HLS
N
SL
Wires to Pump
and Zone Valve
X-Relay SEC. PUMP
VOLT FREE 230VAC
L N L N
PL
BOILER
B1 B2
SL
SUPPLY
230VAC
L N
Switch Live
To Boiler
Zone Valve wiring connections
for 230v boiler Switching
SUPPLY
230VAC
L N
N
X-Relay SEC. PUMP
VOLT FREE 230VAC
L N L N
L1
L2
PL
L
L
N
See Inserts for
Zone Valve/Boiler
wiring options
BOILER
B1 B2
SL
2
Power Live
Switch Live
High Limit Temperature Stat
1
N
C
L
PL
SL
HLS
High Limit
Temperature
Stat (HLS)
N
L
2 Port Zone
Valve
12. Boiler Switching via Zone Valve
High Limit Temperature Stat
- The live (brown) should be wired into terminal (1) of the Honeywell
high limit stat (HLS) Article No. 225125
If fitted in a confined space, sufficient ventilation must be
available to keep the valve within its ambient temperature
- Electrical
The pumpConnections
neutral (blue)ofwire
is to be connected
terminal
Secondary
Pump Via to
HLS
and 2‘N’
port Zone Valve
mainsmust
& volt
boilertoconnections
range.showing
Also access
beFree
provided
remove the
terminal of the main pump connection inside the control centre
powerhead if necessary.
- The pump earth wire (green & yellow) connects to the ‘E’ terminal
next to the main pump connection inside the control centre.
Fitting
(always read and follow instructions supplied with components)
- The valve should be installed without blocking any vent or cold feed
when closed
- Positioning the zone valve (ZV) at an angle is possible, but it must
not be mounted so that the powerhead is below the horizontal level
of the pipework
- For recommended positions refer to Fig. 11.
22
Please note that both heating and cooling flow and
return pipe require Valves to prevent any system byepass.
Although two valves for H & C are to be installed,
only connect up one set of end switches per valve set.
COOLING ZV
FLOW
Chiller Pump
This pump may not be required as it may be incorporated
.
within and thus controlled by the chiller logic
COOLING ZV
RETURN
N
Chiller power must be taken from a
supply with a suitable power rating
N
L
HEATING ZV
FLOW
L
CHILLER UNIT
Volt free
HEATING ZV
RETURN
SUPPLY
230VAC
L
BOILER
B1 B2
X-RELAY
C1 C2
SEC. PUMP
230VAC
N
L
N
230v supply form heating
system main switch fuse spur.
BROWN
BLUE
BLUE
BROWN
BROWN
BROWN
BROWN
BLUE
ADD-ON
MODULE
N
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
9.
N
10
WIRELESS
RECEIVER
15
BLUE
ORANGE
GREY
WHITE
ORANGE
GREY
WHITE
BROWN
NETWORK
BUS
L
L
RJ45
NETWORK
BUS
BLUE
BROWN
BLUE
GREEN & YELLOW
BROWN
FC Controller (Main Control)
l1
l2
l3
AC 100 240V
16
l4
l5
l6
Input 6 x AC
IMO iSmart
Run
SMT-BA-R10
Output 4 x Relay /BA
Q2
Q3
Q4
14
13
12
6.
1
L
l1
Q4
Q4
Q3
l3
l2
Q2
Q1
Q1
1. Chiller power supply must not be taken from
the FC or K-Mod
2. Make all electrical connections to the chiller
unit as directed by the unit manufacturer.
The connections shown are for Illustrastion purposes only.
All black cables are pre-wired
13. COOLING ONLY Wiring diagram showing the K MOD connection to heating/cooling zone valves, chiller pump and chiller units
2.6.3 Working Principle (HEATING & COOLING)
In a Heating/Cooling system the zone valves are a safety
mechanism. The system is designed not to operate if the opposite
valves are open i.e. the cooling/chiller will not start until the
heating zone valve 8 have closed thus preventing any opportunity
for cross contamination of the systems. As the REHAU FS/FC
controller operates the valves any DHW system can function as
a separate unit and supply hot water on demand (please refer to
above Fig.).
23
3.0
REHAU IntEllIgEnt FH /
C ZonE ContRol systEm
3.1
ComPonEnts ovERvIEw
3.1.1 Components Overview Heating
Component
Article number
REHAU FS Controller
225114-002
(24V)
The REHAU FS controller is suitable for connecting up to 8 zones of multiple sensors and 24V actuators.
It comes supplied with the flow temperature sensor. In addition the controller provides outputs for the UFH
pump, boiler demand signal and mixing valve and mixing valve control signal and power (24V). Requires
REHAU WLOC-19-RH for weather compensation (Heating only).
225115-002
(24V)
The Add On module provides another 6 zone connections. A maximum of 1 extension module can be used
the FS/FC controller to increase the zones up to a total of 14 zones.
225108-002
(5V)
The 24/7 clock combined with the 4-event timer enables the end user to customise his heating system
according to his requirements with an adjustment range from +5ºC to +35ºC. This sensor is also able
to set the set point temperature for multiple other sensors (except another control sensor). Not used if
cooling is to be utilised.
225109-001
(5V)
This room sensor is the ideal solution for public areas where unauthorised adjustments are to be
prevented.
225106-001
(5V)
This room sensor offers local temperature adjustment of ± 4ºC from the current set point of zone
temperature.
225107-002
(5V)
This room sensor offers identical features to the REHAU TA sensor. In addition it has a slide switch to enable
the end user to manually switch the zone into one of 4 modes: Auto, Day, Night and Frost Protection.
225116-001
(5V)
This room sensor has identical features to the REHAU TM sensor. In addition it comes including a 3m
long sensor which can be used to prevent the floor surface temperature to either drop below a pre-set
minimum or rise above a pre-set maximum temperature.
225385-001
The separate floor sensor works only in conjunction with a CT2 Programmable Room Sensor or TD sensor.
228007-001
Remote air sensor works only in conjunction with a TM sensor.
(Available in Brass and Aluminium, please contact sales office)
Add On Module,
REHAU CT2, Programmable Room Sensor
REHAU TP, Tamper Resistant Sensor
REHAU TA, Standard Sensor
REHAU TM, Comfort Sensor
REHAU TD Sensor with floor sensor
REHAU Separate Floor Sensor
REHAU Remote Air Sensor
24
Component
Article number
REHAU OC Module, Outside Air Temperature Sensor
225117-001
(5V)
The module is only required if the REHAU FS variable temperature controller is used. It senses the current
external temperature and enables the FS controller to calculate the compensated flow temperature. It
comes in an IP65 enclosure and should only be installed on north facing walls.
241293-002
(24V)
The actuator allows individual control of circuits by opening and closing the corresponding isolating valve
on the manifold.
202239-001
If the distance between the master and the Add On Module exceeds 0.3m, then net extension kit is
required. This includes 2 connector blocks with RJ 45 cable ends.
211786-001
(5V)
As the thermal actuator outputs on the master controller and Add On module are 24 volt ac, there is sometimes
a need to convert these to be able to switch 240 volt i.e. for connecting a zone valve, dehumidifier etc.
A Relay module R-24- SP can be used on thermal actuator output TH 1 to 8 on Master Controller, TH 9 to 14 on
the Add On Module. The relay is designed to operate a switching current of up to 2Amp and is fitted with green
indicator lamp to signify operation.
202234-001
(5V)
This 24/7 clock combined with the 4-event timer enables the user to customize his domestic hot water
according to his requirements. It is provided with a remote flow temperature sensor which is strapped on to
the domestic hot water supply pipe from the cylinder (within 150mm of top of cylinder).
202226-001
(5V)
This wireless 24/7 clock combined with the 4-event timer enables the user to customize his room
temperature according to his requirements. This wireless room controller provides two stage control of a
designated area or room which may be part of an underfloor heating system. These units are used where
a secondary heat source is employed to boost the temperature within the area if the conventional heating
system is not powerful enough.
202243-001
(5V)
This 24/7 clock combined with the 4-event timer enables the user to control the temperature of a circuit
or Zone of Radiators that are hydraulically independent from an underfloor heating system. For more
information refer to section 8, see page 57.
225125-002
Over temperature thermal cut-out device with auto reset.
Actuator
Net Extension kit
24V Relay
REHAU CT2 / HW, Hot Water Controller
REHAU CT2 / 2 Two Stage Controller
REHAU CT2 / R Radiator Controller
High Limit Sensor
25
3.0
REHAU IntEllIgEnt FH /
C ZonE ContRol systEm
3.1
ComPonEnts ovERvIEw
3.1.2 Additional Components Overview Heating/Cooling
Component
Article number
REHAU FC Controller
202236-001
(24V)
Variable Temperature
The REHAU FC controller is suitable for connecting up to 8 zones of multiple sensors and 24V actuators. It
comes supplied with the flow temperature sensor. The controller is capable of switching between heating/
cooling automatically. In addition the controller provides outputs for the UFH pump, boiler/chiller demand
signal and mixing valve and mixing valve control signal and power (24V). Requires REHAU WLOC-19-RH
for weather compensation (Heating only).
229436-001
(230V)
The cooling module is required if a chiller is used for underfloor cooling. It is not required if a reversible
heat pump is used for the underfloor cooling.
229435-001
(5V)
The humidity sensor is required for the due point control of a underfloor cooling system.
REHAU K MOD
REHAU Humidity Sensor
FC Master Controller replaces FS Master Controller for
heating/cooling
26
3.1.3 Components Overview Wireless Sensors/Controllers
Component
Article number
REHAU RC, Wireless Receiver
202244-001
(5V)
The wireless receiver is required to receive signals from wireless sensors/controllers. Max distance
between the master/add on module and receiver is 3 m. Communication distance of up to 30 m inside
building and 100m line of sight. The wireless receiver is hard wired to the FS/FC Master Controller/Add On
Module.
REHAU RF CT2, Programmable Room Sensor
202246-001
(5V)
The wireless 24/7 clock combined with the 4-event timer enables the end user to customise his heating
system according to his requirements with an adjustment range from +5ºC to +40ºC. The control
thermostat is also able to set the set point temperature for multiple other thermostats (except another
control sensor). Not used if cooling is to be utilised.
202253-001
(5V)
This wireless room sensor is the ideal solution for public areas where unauthorised adjustments are to be
prevented.
202251-001
(5V)
This wireless room sensor offers local temperature adjustment of ± 4ºC from the current set point of zone
temperature.
202254-001
(5V)
This wireless room sensor offers identical features to the REHAU TA sensor. In addition it has a slide
switch to enable the end user to manually switch the zone into one of 4 modes: Auto, Day, Night and Frost
Protection.
202245-001
(5V)
This wireless room sensor has identical features to the REHAU TM sensor. In addition it comes including a
3m long sensor which can be used to prevent the floor surface temperature to either drop below a pre-set
minimum or rise above a pre-set maximum temperature.
202235-001
(5V)
This wireless 24/7 clock combined with the 4-event timer enables the user to customize his domestic
hot water according to his requirements. It is provided with a remote flow temperature sensor which is
strapped on to the domestic hot water supply pipe from the cylinder (within 150mm of top of cylinder).
202249-001
(5V)
This wireless 24/7 clock combined with the 4-event timer enables the user to control the temperature of
a circuit or Zone of Radiators that are hydraulically independent from an underfloor heating system. For
more information refer to section 8, see page 57.
202229-001
(5V)
This wireless 24/7 clock combined with the 4-event timer enables the user to customize his room
temperature according to his requirements. This wireless room controller provides two stage control of a
designated area or room which may be part of an underfloor heating system. These units are used where
a secondary heat source is employed to boost the temperature within the area if the conventional heating
system is not powerful enough.
REHAU RF TP, Tamper Resistant Sensor
REHAU RF TA, Standard Sensor
REHAU RF TM, Comfort Sensor
REHAU RF TD, Floor Limit Sensor
REHAU RF CT2 / HW, Hot Water Controller
REHAU RF CT2 / R, Radiator Controller
REHAU RF CT2 / 2, Two Stage Controller
27
3.0
REHAU Intelligent FH /
C Zone Control System
3.2
Working Principle
The sophisticated electronic control system was designed specifically
for underfloor heating and cooling applications in the residential
and light commercial sectors. The room sensors using proportional
integral (PI) controls are designed to control the indoor comfort
temperature with a high level of accuracy. The sensors communicate
with the REHAU FS/FC Master Controller using a bus protocol, which
reduces the wiring of the components to a minimum whilst the range
of sensor types allows greater flexibility in control system layout and
can meet the requirement of most projects.
0.25mm2 2-core cable is recommended for connecting the system in
either star or series (daisy chain) configurations. Standard installation
cable (1mm2 twin) can be used if required. The low voltage (5v) bus
system makes it possible to install the room sensors in almost every
environment whilst always providing maximum safety.
The temperature requirements of each heated / cooled zone on the
system is communicated to the master controller unit of the system,
i.e. REHAU FS/FC for variable water temperature heating cooling
systems. The master control units will then control the operation of
circuit actuators, main system pump, secondary pump and the boiler
/ chiller switching and the operation of the mixing valve actuator.
Proportional Integral Control Sensor
The REHAU controller utilises PI Control, this is designed to cover
a broad range of specifications. The system uses self learning
capabilities to continue optimisation throughout its operation.
After approximately 3 – 10 days, depending on the number of
operations, the system should reach optimal output levels for
given conditions.
Advantages of this form of control are that, after a short period,
the controls determine the optimum time to open the actuators,
allowing the room to reach the set temperature with minimum
overshoot. This gives high comfort levels while ensuring minimum
wasted energy.
‘Hunting’ behaviour, a characteristic associated with traditional
sensors, causes the on-off cycling of the boiler when searching for
the set temperature; this can result in excessive wear and tear on
components. REHAU PI control eliminates the ‘hunting’ behaviour
and can help to increase the cycle life of all system components.
Traditional ON/OFF control
20.5ºC
The integration of the system into the ‘S’ plan control configuration
is also possible.
Advanced PI- control
OFF
20.0ºC
19.5ºC
HEAT 100% ON
The graph above left shows the
‘hunting’ temperature profile of a
room with a traditional sensor.
14. Pi-Control of room temperature
28
PI- control gives a more stable and
accurate room temperature - for
higher comfort levels.
The graph above right shows
the stabilising effect of the PI
controller, improving comfort and
saving energy.
Considering the graph to the right we see that the desired set
point temperature is set at 20°C by 8am.
As the REHAU intelligent master uses a software algorithm to
control the time to warm up, this varies the required start up point
by learning from its previous sensor history and only switching on
at the last possible moment to allow the room to reach set point
at the desired time. The result is a significant energy saving that is
achieved as indicated in blue on the graph above.
Potential energy savings
Internal Temperature °C
Optimum start control
REHAU CT2 Programmable Room Sensor, Radiator and Two stage
controllers have an advanced time clock that learns how quickly a
building reaches desired temperature i.e. set point by constantly
measuring the temperature in the zone. This subsequently brings
on the heating at the optimum time prior to building occupancy.
This typically results in the heating being switched on later on mild
days normally resulting in a 10% energy improvement.
20°C
18°C
Clock set for 6am
12°C
Optimised start
8°C
04
05
06
07
08
09
10
Time during the day
15. Graph showing an example of optimised start
29
3.0
REHAU Intelligent FH /
C Zone Control System
3.2
Working Principle
60
Fixed flow water temperature
Temperature
50
40
30
Weather compensated flow water temperature
20
10
External Temperature
0
October
November December
January
February
March
April
May
June
July
August
September
Time of the year
16. Flow Water temperature with and without weather compensation
3.2.1 Weather Compensation
Flow Water temperature with and without weather compensation
Weather compensation using Intelligent controls
Weather compensation is the ability to change the temperature of
the heating system flow water in relation to the changes in outdoor
temperatures.
In the above graph it can be seen that the flow temperature (without
weather compensation) is constant and does not vary with the
changes in external temperature. This may lead to greater boiler
cycles which results in lower efficiency of the boiler over long period
of operating time.
From the above graph, with the use of weather compensation the
flow temperature gradually decreases with the increase in external
temperature and results in comfortable room temperature and higher
boiler efficiency.
From the above graph it can be understood that there is a
requirement for heating for approximately 235 days in a year, during
which the heating system is on peak load for no more than 15 days
and running below half load for 2 out of 3 days.
Hence, by weather compensating the floor heating system, there
would be reduced boiler cycles and increased energy savings, since
the boiler is fired as per the heat demand from the room and not
in maintaining a constant flow water temperature. This results in
increased boiler life and minimum wastage of energy, and therefore
lower CO2 emissions in comparison to fixed flow.
30
The values for the external temperature are the monthly
averages and have been obtained from the meteorological
office for the year 2005.
Weather compensation can only be achieved using an FS /
FC controller
Building Regulations
1. All non-domestic hydronic heating installations using floor
heating must have weather compensation of the flow temperature
– as per the “Non Domestic Compliance Guide, table 4” which is
part of the building regulations.
2. It has been stated in the guide that compensation can be achieved
by:
a) Directly on the boiler plant (by a BMS or a boiler mounted
controls) or b) via the secondary control system responsible for
the space temperatures.
3. There are no specific requirements for weather compensation
in domestic (residential) regulations although recommended.
However, as the buildings are now assessed for their energy
efficiency, increased energy efficiency ratings can be achieved
with the use of weather compensation.
3.2.2 Required Components for Zone Control
This table should help you identifying which components you need dependent on your choice of zone temperature control.
More details on each control option and how they are installed and electrically wired are given in the subsequent sections.
Masters/ Add On modules
Quantity
Components
REHAU Art. No.
Heating
Heating/Cooling
REHAU FC (HEATING & COOLING MASTER)
202236-001
No
Yes
REHAU FS (Heating only)
225114-002
Yes
No
K MOD
229436 (230V)
No
Yes*
REHAU OC Module
225117(5V)
Yes
Yes
Add On Module
225115-002
Up to 8 zones: 0x
Up to 14 zones: 1x
* If chiller is used for cooling
Wired Sensors/Controllers
Quantity
Components
REHAU Art. No.
Heating
REHAU CT2 (Floor Heating Controller)
225108-002
Minimum:1x (same time setting in all zones)
Maximum:14x (different time setting in all zones)
Heating/Cooling
REHAU TP (Tamper resistant sensor)
225109-001
REHAU TA (Standard Sensor)
225106-001
Up to 8 zones: maximum of 7x
Up to 14 zones: maximum of 13x
REHAU TD (Comfort plus sensor, includes floor sensor)
225116-001
REHAU TM (Comfort sensor)
225107-002
REHAU HS (Humidity sensor)
229435-001
No
Actuators
241293-002
Minimum:1x per controlled circuit
Maximum:12x per manifold / controller
Switch fused spur
Not supplied
1x
Net Extension kit
202239-001
If the distance between the master and the Add On module exceeds 0.3m, then net extension
kit is required. This includes 2 connector blocks each with cables with RJ45 connectors
Up to 12 HS sensors per controller
Wireless Sensors/Controllers
Quantity
Components
REHAU Art. No.
Heating
REHAU RF CT2-RH
202246-001
Minimum:1x (same time setting in all zones)
Maximum:14x (different time setting in all zones)
Heating/Cooling
REHAU RF TP
202253-001
REHAU RF TA
202251-001
Up to 8 zones: maximum of 7x
Up to 14 zones: maximum of 13x
REHAU RF TD
202245-001
REHAU RF TM
202254-001
REHAU RC
202244-001
Minimum: 1x
Maximum: 5x
Communication distance: Up to 30m inside building and 100m line of sight
Note Maximum manifold
Size = 12-Port
31
4.0
Control System First Fix
4.1
Cables requirements
All REHAU control systems must be installed:
- By a competent person.
- In accordance with all local electrical regulations and the current IEE
wiring regulations set out in BS 7671
- In accordance with the latest issue of the instructions supplied with
each component.
- It is very important that the cables terminating at the
control unit should have a minimum length of 600mm and
ensure that they are clearly identified so at the second fix
stage it is clear what the cable does.
First fix involves the installation of all the electrical cables to the
position of the control components and routing them back to the
REHAU FS and FC control unit position. Any of the layouts shown
below or a mixture of both systems can be used.
ADD ON MODULE
MASTER
4
7
1
6
5
9
3
ADD ON MODULE
MASTER
10
6
5
1
2
The cable termination length at the sensor position should be
long enough to allow for connection to the sensor i.e.150mm. This
should then be coiled and positioned within an electrical back
box. Both Flush and surface electrical back boxes can be used.
7
2
3
8
SENSORS CONNECTED IN STAR
11
4
8
9
10
SENSORS CONNECTED IN BUS MODE (DAISY CHAIN)
17. Star & Series cable layouts
The following cables sizes are required from the component
position within the building, back to the REHAU FS/FC controller
position.
First fix work should be carried out whilst the building is
under construction and before the plasterwork has started
Specific Specifications of REHAU Intelligent controls
Description
Cable size
Main heating system switch fuse spur 1mm2 2 cores & earth
to main control unit:
Heating
Heating/
Cooling
Yes
Yes
1.
Maximum cable length from controller to actuator
40m
2.
The maximum system cable length using the series layout is
300m
3.
The maximum cable length between sensors/controllers is
100m
4.
The maximum cable length from a sensor to the
REHAU FS/FC in star configuration is
100m
100m
FS/FC Control unit to add on modules
4 core 0.25 mm2
Yes
Yes
Control unit position to zone valve
1mm2 2 core & earth*
Yes
Yes
5.
Maximum cable length from FS/FC to Add On Module
Control unit position to Mixing valve
actuator (MVA)
1mm2 3 core
Yes
Yes
6.
Maximum cable length of flow temperature sensor to controller 50m
7.
Control unit to UFH circulating pump 1mm2 2 core & earth
Yes
Yes
Maximum number of actuators that can be connected to
the Master Controller / Add On Module
Room sensor/controller
(Daisy Chain or Star)*
0.5mm2 2 core
Yes**
Yes**
Control unit to actuator
(if further than 1m away)
1mm2 2 core
Yes
Yes
Wiring to main system boiler controls
1mm2 2 core & earth
Yes
Yes
From K MOD to 2-port Zone valves
1mm 3 core & earth
No
Yes
From controller to K MOD
1mm2 2 core & earth
No
Yes
Wiring to chiller unit (Heating/Cooling)
To meet the demands of
the chiller load. Check
with chiller company
No
Yes
32
2
14/8
8.
Maximum number of actuators on each output on controller 4
9.
Maximum distance between the master/add on module
and wireless receiver
3m
*It is recommended that different coloured cables are used for the 5v bus connection
of the sensors and the FS/FC controller, care must be taken to ensure correct wiring
connection between sensors & controller terminals if wires of the same colour are
used.
** Not required if wireless sensors/controllers are used
4.0 Control System First Fix
4.2
Positioning the FS and FC controllers Room Sensors and
Remote Air / floor Sensors
4.2.1 Location of Room, Humidity Sensor and Air Sensor
The requirement for the correct positioning room sensors cannot be
overstated. Care must be taken to ensure the sensors are located;
1. In a position with good air circulation at the ambient temperature
preferably on an internal wall at a height of 1.6 metres from floor
level.
2. The sensor must not be positioned in draughts, above a heat
source or where the temperature will be influenced by localised
heat gains from direct sunlight, water pipes or appliances.
3. If fixed to a studded wall the cable exit holes should be sealed
to avoid draughts.
4. The sensor must be mounted to a vibration free surface.
Humidity Sensor should not be positioned where short term
high humidity is possible e.g. kitchen, bathrooms etc.
4.2.2 Positioning the Remote Air Sensor
The remote air sensor is supplied fitted into a standard electrical switch
blanking plate (White, Brass or Stainless Steel). If required the sensor
can be removed from the supplied mounting and fitted into any surface.
Required cable size is same, 0.5mm2 from the remote air sensor to TM
sensor position.
Unlike the REHAU TD floor sensor the remote air sensor is only
fitted when required and can only be used with the REHAU TM
sensor
4.2.3 Positioning the Floor Sensor
The floor sensor should be positioned where it can detect the true
temperature of the floor and always be within the heated area of the
controlled room.
For easy replacement ofTo the
sensor it is recommended that the sensor
Controller
be placed within a screed/concrete but level with the surface. The
sensor can be placed within a 10mm copper sleeve (not supplied) to aid
+ +This position will also give a true reflection of
the removal of the sensor.
the floor surface temperature.
10 Cu Tube
Floor Sensor
max. 450 mm
THERMOSTAT
Timber Floor
Screed
18. Positioning of room sensor
19. Positioning of floor sensor
Location of the REHAU FS and FC Controller
The REHAU FS unit should be installed in a suitable location
leaving room to work on the controller. The area should also be
clean, dry location mounted on solid vibration free structure within
0.8 metre above the FH manifold. The REHAU FC can be located
within REHAU manifold cabinets.
33
4.0
ContRol systEm FIRst FIx
4.3
wIRElEss sEnsoRs/ContRollERs sEt UP/RAdIo FREqUEnCy (RF)
REHAU wireless sensors can be used in
conjunction with wired sensors. When using
wireless sensors, a receiver unit has to
be connected to the main controller. The
sensors/controllers are powered by standard
AAA batteries and an alarm signal indicates
when these are running low. A frequency
band of 868 MHz is used in order to
maximise communication stability.
4.3.1 Set Up
Where wireless Room Sensors/Controllers are being used, it is
necessary for the master controller (FS/FC) to “confirm” that the
Room Sensors/Controllers are communicating correctly.
To achieve this:
1. On master, switch on DIP-3 to activate Sensor Check:
Room Sensor
Jumper
Sensor check
mode button
Channel
selector
RF CT2 Programmable Room Sensor/Controller
ON
OFF
1 2 3 4 5 6 7 8
DIP Switch 3 turned to ‘ON’ on the master controller to enable ‘Sensor Check’
2. All wireless Room Sensors/Controllers now have to be initialized (to
ensure controllers/sensors are communicating with the main controller)
ON
ON(RF-TA, RF-TD, RF-TM, RF-TP) are initialized by
a) Room Sensors
pressing the internal
learning mode button until a beep is heard. (See
OFF
OFF 1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
fig. 20)
b) Room Controllers (RF-CT, RF-DHW, RF-R, RF-2S) by pressing the pin
hole button with the clock symbol until a beep is heard. (See fig. 20)
3. Switch off DIP-3 to de-activate Sensor Check.
ON
OFF
1 2 3 4 5 6 7 8
DIP Switch 3 turned to ‘OFF’ on the master controller to disable ‘Sensor Check’
34
Sensor check mode button
20. Wireless room sensor / controller
REHAU Wireless
Receiver (RC)
REHAU FS/FC
Master Controller
21. Connection of master and wireless receiver
4.3.2 Technical Data
Supply Voltage
24 V from Master
Distance to master
Max 3 m
Enclosure
IP 21
Ambient temperature range
0 to 40°C
Communication Frequency
868 MHz
Communication distance
Up to 30m inside building and 100m
line of sight
Connection of master and receiver
The receiver is connected to the master or the add on module using
the included cable. Max distance between the master/add on module
and receiver is 3m. Up to 5 receivers can be connected. (The wiring of
the receivers can be made in either a daisy chain or in parallel)
Positioning
Do not place the receiver inside a metal box. In case of
communication problems it may be necessary to move the location of
the receiver, or to add an additional receiver.
Configuring
Connect the receiver to the master, and the system will reconfigure
itself for wireless operation.
35
5.0
ContRol systEm sECond FIx
5.1
REHAU Fs/FC ContRol UnIts
FS
20.1˚C
WLM. Hydronic Master
Buttons for navigating
Up ( ), Down ( ) and Enter (
1
2
3
4
5
6
7
)
8
Red: Zone 1 to 8 indicating heating is on
Green: Boiler enable signal is activated
Green: Secondary UFH is running
Green: Main boiler (primary) pump is running (if installed)
Green: Power supply connected, Red: Night setback is running, Red flashing: Indicates error
The REHAU FS and FC control unit can operate 8 zones. The REHAU
FC zones can be heating only or Heating / Cooling, each of these zones
may have a number of FH or FH/C circuit actuators connected. (see
section 5.3.3 connecting the thermal actuators)
Each zone / room has a designated output within the controllers
(TH1/8). If more zones are required then a REHAU OC extension
module has to be provided. Each REHAU FS/FC control unit can
facilitate the connection of 1, REHAU Add On extension module
making the maximum number of controlled zones 14.
(The setting of the zones is referred to later in the document within
Section 6.2, see page 47)
5.1.1 Location of the REHAU FS/FC Controller
The REHAU FS/FC control unit should be installed in a clean, dry
location mounted on solid vibration free structure within 0.8 metre
above the manifold. The REHAU FS/FC controller can be located within
REHAU manifold cabinets.
36
5.1.2 Fixing the REHAU FS/FC Unit
Removing the 6 screws on the face of the unit will allow access to
the three fixing holes provided.
Fix the controller to the building structure using suitable fixing
screws do not damage the unit housing. Do not over tighten the
fixing screws.
If necessary 10mm spacers (not provided) can be used to allow
cables to pass through the cable access panels at the rear of the
unit. Alternatively surface cables can be run into the terminals
using either the cable release in the cover or by pressing out the
cable entries in the lower part of the cover.
5.1.3 Systems Utilising Weather Compensation with Multiple
Controllers.
(See section 10, Fig. 53 on page 69)
5.0
Control System Second Fix
5.2
Mains Voltage (230v) Electrical Connection
to the FS/FC Controller
Ensure that the electrical installation is carried out in
accordance with the local wiring regulations and the IEE
wiring regulations as set out in BS 7671.
5.2.1 Mains Voltage (230v) Electrical Connection to the FS/FC
Controller
5.2.3 Boiler Connection
The REHAU FS/FC control unit has a volt free relay, which may be
used to switch a boiler or to open a motorised valve.
MAINS SUPPLY FROM
3 AMP FUSED ISOLATOR
L
N
E
BOILER BOILER CONNECTION ON
B1 B2 MASTER CONTROLLER
E
The cable from the main system, switch fuse spur should be
should be connected via a local isolation switch to the mains
terminal block within the REHAU FS/FC control unit marked
L, N, E ( As shown in Fig. 22).
E
N
L
BOILER REQUIRING LIVE
(230V) SWITCHING
BOILER BOILER CONNECTION ON
B1 B2 MASTER CONTROLLER
MAINS SUPPLY FROM 3 AMP FUSED ISOLATOR
22. Main wiring connection terminals
5.2.2 Wiring High Limit Sensor
- The pump live (brown) should be wired into terminal (1) of the
Honeywell high temperature limit stat (HLS) via terminal (L1) of
connector block. Article No 225125
- The pump neutral (blue) wire is to be connected to terminal ‘N’
terminal of the main pump connection inside the control centre
- The pump earth wire (green & yellow) connects to the ‘E’ terminal
next to the main pump connection inside the control centre
(Refer to Fig. 12, see page 22)
Boiler relay will energise 1 min after the start of main pump.
With the REHAU FS/FC Controller, the unit has supply water
temperature control and the boiler relay will be ON when the
valve has reached 20% open and will remain on as long as
there is a demand from the room sensors.
REMOTE START
TERMONALS
OF BOILER
VOLT FREE SIGNAL
23. Connection Of mains 230v supply and volt free connection to boiler
Connecting the Boiler requiring 230v AC connection
(Floor Heating only)
To control the switching of a boiler or motorised valve requiring mains
voltage, make a link from the L (230v) mains input terminal to the
terminal marked BOILER – B1. Connect the boiler switched live to
the terminal marked BOILER – B2. Connect the boiler neutral wire to
the terminal marked N in the controller and earth wire to the terminal
marked E in the controller. As shown in Fig. 23.
Connecting the boiler requiring volt free (potential free) switching
(Floor Heating Only)
To control the switching of a boiler with dedicated terminals for remote
switching e.g. room sensor, connect these terminals to B1 & B2 on the
control unit. Terminals B1 & B2 are volt free. As shown in Fig. 23.
37
ON
DIP SWITCHES
ON
DIP SWITCHES
5.0
Control System Second Fix
5.2
OFF DIP SWITCHESConnection
Mains
Voltage (230v) Electrical
OFF DIP SWITCHES
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
ON
ON
to the FS/FC ControllerOFF
RESERVED RESERVED RESERVED
DEHUMIDIFIER
DEHUMIDIFIER
DEHUMIDIFIER
X - RELAY X - RELAY
DIP Switch 4 turned to 'ON' on the master controller to start
initial heat up sequence in accordance with BS EN 1264
1 2 3 4 5 6 7 8
X - RELAY
X - RELAY
BOILER TESTBOILER TEST
BOILER TEST
INSTALL MODE
INSTALL MODE
INSTALL MODE
RESERVED RESERVED RESERVED
DEHUMIDIFIER
DEHUMIDIFIER
DEHUMIDIFIER
X - RELAY X - RELAY
BOILER TESTBOILER TEST
BOILER TEST
SENSOR CHECK
SENSOR CHECK
SENSOR CHECK
INITIAL HEAT INITIAL
UP
HEAT
INITIAL
UP HEAT UP
SEQUENCE SEQUENCESEQUENCE
INSTALL MODE
INSTALL MODE
INSTALL MODE
OFF
DIP Switches on the master controller
1 2 3 4 5 6 7 8
SENSOR CHECK
SENSOR CHECK
SENSOR CHECK
INITIAL HEAT INITIAL
UP
HEAT
INITIAL
UP HEAT UP
SEQUENCE SEQUENCESEQUENCE
OFF DIP SWITCHES
ON 1 2 3 4 5 6 7 8
OFF DIP SWITCHES
ON 1 2 3 4 5 6 7 8
DIP Switch 4 turned to 'ON' on the master controller to start
5.2.4 X-Relay OutputDIP Switches on the master controller
initial heat up sequence in accordance with BS EN 1264
Both FS and FC controllers have a relay which can be utilized for a number of different purposes. The relay is a volt free output and is
X RELAY Output
DIP Switch 4 turned
to 'ON'relay
on the master
controller to start by the setting of the DIP-switches. The
DIP Switches
on the master
positioned on the master
controller,
ascontroller
shown on the drawing. The function
of the
is determined
initial heat up sequence in accordance with BS EN 1264
functions that the relay can perform, and the
ON appropriate DIP-switch settings, are as follows:
X RELAY Output
To control
DIP - 5
OFF
1 2 3 4 5 6 7 8
DIP
ONswitches
DIP - 6
X RELAY Output
Description
(located on the master controller)
Main Pump
Off
OFF
1 2 3 4 5 6 7 8
ON
Off
OFF
ON 1 2 3 4 5 6 7 8
High limit zone valve
On
OFF
ON 1 2 3 4 5 6 7 8
Off
OFF
1 2 3 4 5 6 7 8
ON
Cooling device or
module alternative
On
On
OFF
ON
1 2 3 4 5 6 7 8
OFF
ON 1 2 3 4 5 6 7 8
Where a boiler primary pump is required to be switched on from the master,
the X relay output can be used for this purpose. This relay will be activated 10
seconds after the UFH circulating pump has started.
This function is used where an additional protection is required to prevent boiler
water entering the underfloor system. When the system is off or when the
supply water exceeds 65°C. An additional flow water temperature sensor and a
zone valve are connected (Fig. 10)
The relay output can be used to provide a volt free signal to a heat pump or to
a K-MOD (switching module) where a chiller is utilized to provide the cooling
water. The relay output is always on in cooling mode and off in heating mode.
(Refer to Fig. 26 for connecting K-MOD to Master Controller)
OFF
1 2 3 4 5 6 7 8
ON
SUPPLY
230VAC
L N
OFF
BOILER
B1 B2
X-RELAY
1 C1
2 3C2 4
SEC. PUMP
UFH
230VAC
L5 6N
230V output from X-Relay
The X relay output is volt free as shown in fig.
24 If the relay is required to be used as an L &
N switch, connect a link wire from mains live
to C1, connect the device live to C2, and the
device neutral to mains Neutral.
7 8
X - Output
24. X - Output on the FS/FC controller
X - Output on the FS/FS-C controller
FS/FC Controller (Main Control)
UNIT
NUMBER (1-9)
STRING
NUMBER (1-F)
0
DIP SWITCHES
DIP SWITCH
ON
C1
C2
L
BOILER
B1 B2
1
230VAC
L
N
2
N
L
N
THERMAL ACTUATORS
3
4
L
N
L
N
5
L
6
N
L
7
N
L
8
N
L
N
DISPLAY
L
5
L
6
N
L
7
N
L
8
N
L
N
BOILER
B1 B2
X-RELAY SEC. PUMP
C1 C2 230VAC
L N
GREEN/YELLOW
EXT.
SWITCH
I
O
LINK
N
THERMOSTAT BUS
+
+
+
+
Y
X
OFF
MIXING VALVE 24V AC
THERMOSTAT BUS
APP
SENSOR
MIXING VALVE
0 - 10V
+
X-RELAY
C1 C2
FLOW WATER
TEMPERATURE SENSOR
APP
SENSOR
SEC. PUMP
UFH
230VAC
L N
1 2 3 4 5 6 7 8
Ensure that DIP 5 is turned on and
DIP 6 is turned off to enable the
function of high limit zone valve
TO BE STRAPPED ON THE PIPE WORK (FLOW) AFTER THE ZONE VALVE
BROWN
BLUE
SUPPLY
SENSOR
T
L
N
E
SUPPLY
230VAC
L N
3
4
L
N
L
N
THERMAL ACTUATORS
T
SUPPLY
230VAC
L N
N
N
T
L
BOILER
B1 B2
L
T
SUPPLY
230VAC
2
N
T
1
L
ON
1 2 3 4 5 6 7 8
X - RELAY
OFF
L
N
ZONE VALVE
E
25. Connections for separate high limitation to the Master Controller
UFH PUMP
38
UFH PUMP OUTPUT ON FS/FS-C controller
High Limit Zone Valve
This function is used where an additional
protection is required to prevent boiler water
entering the underfloor system, when the system
is off or when the supply water exceeds 65ºC. An
additional sensor and a zone valve is connected
as per Fig. 25.
5.2.5 Connecting the Cooling Output to the K MOD
The REHAU heating/cooling Control system will provide an output
signal to enable a chiller demand via the K MOD. To prevent any
simultaneous operation of heating and cooling the REHAU system
zone valve wiring connections must be via this the K MOD.
(As shown in Fig. 26).
5.2.6 Connecting the Heating/Cooling Zone Valves
The zone valves REHAU Art No. 230462 (22mm) and Art No. 230472
(28mm) must be used on the system and connected in such a way that
when the cooling zone valves are open, the end switch of these valves
power close the heating valves thus preventing the hot water from
boiler operation e.g. DHW being pumped into the cooling system.
Wiring Connection of these valves are shown in Fig. 26.
Please note that both heating and cooling flow and
return pipe require Valves to prevent any system byepass.
Although two valves for H & C are to be installed,
only connect up one set of end switches per valve set.
COOLING ZV
FLOW
Chiller Pump
This pump may not be required as it may be incorporated
.
within and thus controlled by the chiller logic
COOLING ZV
RETURN
N
Chiller power must be taken from a
supply with a suitable power rating
N
L
HEATING ZV
FLOW
L
CHILLER UNIT
Volt free
HEATING ZV
RETURN
SUPPLY
230VAC
L
BOILER
B1 B2
X-RELAY
C1 C2
SEC. PUMP
230VAC
N
L
N
230v supply form heating
system main switch fuse spur.
BROWN
BLUE
BLUE
BROWN
BROWN
BROWN
BROWN
BLUE
ADD-ON
MODULE
N
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
9.
N
10
WIRELESS
RECEIVER
15
BLUE
ORANGE
GREY
WHITE
ORANGE
GREY
WHITE
BROWN
NETWORK
BUS
L
L
RJ45
NETWORK
BUS
BLUE
BROWN
BLUE
GREEN & YELLOW
BROWN
FC Controller (Main Control)
l1
l2
l3
AC 100 240V
l4
l5
l6
Input 6 x AC
IMO iSmart
Run
SMT-BA-R10
Output 4 x Relay /BA
Q2
Q3
Q4
14
13
12
6.
1
L
l1
Q4
Q4
Q3
l3
l2
Q2
Q1
Q1
1. Chiller power supply must not be taken from
the FC or K-Mod
2. Make all electrical connections to the chiller
unit as directed by the unit manufacturer.
The connections shown are for Illustrastion purposes only.
All black cables are pre-wired
26. COOLING ONLY Wiring diagram showing the K MOD connection to heating/cooling zone valves, chiller pump and chiller units
39
5.0
Control System Second Fix
5.2
Mains Voltage (230v) Electrical Connection
to the FS/FC Controller
SUPPLY
230VAC
L N
BOILER
B1 B2
X-RELAY
C1 C2
SEC. PUMP
UFH
230VAC
L N
5.2.7 Pump Outputs
The master has an output for the underfloor circulating pump
(secondary pump). The output will be energised 3 min after the
demand from the room sensor. The delay is to allow time for the
thermal actuator to start opening.
Pump control with REHAU Add On Modules
The REHAU Add On Modules each have a secondary pump
output terminal so that if a demand for heat occurs from the
areas connected to these modules then the local pump can be
energised to circulate heated water around this part of the system.
Connecting UFH Pump:
The 230v AC pump can be connected directly
to terminals L and N
X - Output
under the heading “Sec. UFH Pump”. Connect the pump E (Earth)
terminal to E X(earth)
the
master.
The maximum pump load must
- Output on
on the
FS/FS-C
controller
not exceed 4 amps, 230v at start up. There is an overrun period of 1
minute after the demand for heat from the room sensor disappears.
However in some cases there may only be a single secondary
pump for the whole system served by the FS/FC Master Controllers
and the Add On Modules. This would normally be connected to the
secondary pump output of the FS/FC Master Controllers. However if
a heat requirement occurs only from an area controlled by the Add
On Module then the pump on the FS/FC will not run. If this scenario
is likely to be part of the control system design then to overcome
this wire up as below. Take a connection from the L terminal of
the pump output on the Add On Module and terminate it at the “L”
terminal of the secondary pump output within the FS/FC Master
Controllers. In this way any demand signal whether from the FS/FC
Master Controllers or the Add On Modules can start the secondary
pump. (see Fig. 27).
SUPPLY
230VAC
L N
BOILER
B1 B2
27. UFH pump output on FS/FC controller
X-RELAY
C1 C2
SEC. PUMP
UFH
230VAC
L N
UFH PUMP
Connecting Main
Pump:
UFH PUMP
OUTPUT ON FS/FS-C controller
Please refer to X Relay Output function (Section 5.2.4, see page 38).
The Pump relays will energise after a delay when any room
sensor calls for heat, this is to give time for the circuit
actuators to open. The delay times are:
Secondary FH pump
3 min
Main pump (If enabled) 3 min 10 sec
40
5.0 Control System Second Fix
5.3
Non Mains Voltage (24v, 5v, & Volt Free) Electrical
Connections to the FS/FC Controller
Master Controller
SENSOR BUS
RJ 45 Connection
to
SENSOR BUS
T
T
Connect + to + and
+
T
Add On
Module
+
T
FS/FC
Master
T
RJ 45 Connection
+
T
+
NET EXTENSION KIT
(Required if Add On module is more than
0.3m apart from the master controller)
T
T
5.3.1 Connecting the Add On, Extension Module
The addition of REHAU Add On extension module will increase the
zoning potential from 8 to 14 zones. The FS/FC Master Controller
is connected to the extension module using an RJ 45 connector
cable (this is included with every Add On module). If the distance
between the FS/FC Master Controller and the Add On module
exceeds 0.5m, then net extension kit is required (Art No: 202239)
and use a 4 core cable with 0.25 mm2.
T
28. Connecting extension modules
+ +
Sensor
T
+ +
Sensor
29. Connecting the sensors
5.3.2 Connecting the Room Sensors to the Controller Bus
- The maximum system cable length using the Daisy Chain is 300 metre,
with a maximum cable length between sensors of 100 metre.
- The maximum distance a sensor can be from the REHAU FS/FC
Master Controller is 100 metre. When connected in star configuration
REHAU INTELLIGENT Room Sensors operate on a 5v common Bus
system. Both the REHAU FS/FC Master Controller has three sets of
identical terminals, which can be used for the connection of the
sensors, marked on the printed circuit board ROOM 1 to 3. Any sensor
can be connected to any of these terminals. Remember to
connect + to + and to
No CT2 Programmable Room Sensors to be installed with
FS/FC Controller.
41
5.0
Control System Second Fix
5.3
Non Mains Voltage (24v, 5v, & Volt Free) Electrical
Connections to the FS/FC Controller
FS / FC Master Controller
OUT PUT 1 Out put 2 Out put 3 Out put 4 Out put 5 Out put 6 Out put 7 Out put 8
L
N
L
N
L
N
L
UNIT
NUMBER (1-9)
STRING
NUMBER (1-F)
N
0
4
N
9
5
L
9 8 7 6
N
5 4 3 2
L
THERMAL ACTUATORS 24V
1
N
2
L
3
N
1 0 F E
L
D C B A
8
7
6
DIP SWITCH
ON
OFF
C1
C2
1
230VAC
L
N
L
2
N
L
N
THERMAL ACTUATORS
3
4
L
N
L
N
5
L
6
N
L
7
N
L
8
N
L
N
DISPLAY
SUPPLY
SENSOR
L
5
L
6
N
L
7
N
L
8
N
L
N
EXT.
SWITCH
I
O
N
THERMOSTAT BUS
+
+
+
+
MIXING VALVE
0 - 10V
Y
X
MIXING VALVE 24V AC
THERMOSTAT BUS
APP
SENSOR
T
BOILER
B1 B2
3
4
L
N
L
N
THERMAL ACTUATORS
T
N
N
+
T
L
L
T
SUPPLY
230VAC
2
N
T
1
L
1 2 3 4 5 6 7 8
LINK
THERMAL ACTUATORS 24V
OUT PUT 1 Out put 2 Out put 3 Out put 4 Out put 5 Out put 6 Out put 7 Out put 8
L
N
ZONE 1
L
N
L
N
L
N
L
N
L
N
L
N
L
N
ZONE 4
31. Connection of external
switch/ timer
30. Actuator connection to controller
5.3.3 Connecting Thermal Actuators (TH 1 – TH 8)
Maximum 14 x 24 Volt actuators per controller. Ensure that the
actuators are connected to the correct zone. Actuators controlled by
zone 1 must be connected to output terminal 1 (TH 1) etc.
Connect one wire from the actuator to right hand terminal on the
respective zone output terminal block (TH 1-TH 8) then connect the
other wire from the actuator to the left hand terminal block. These
terminal blocks are not polarity sensitive.
Only REHAU INTELLIGENT 2 wire Room Sensors can be connected
to the control system. Only sensors compatible and supplied
by REHAU Ltd. can be connected to the system. Under no
circumstances should any other type/manufacture of 230v or 24v
Room Sensors be connected to the system. Connection of such
equipment will irreparably damage the controllers & equipment.
Such actions will void all warranties.
5.3.4 External Switch/Timer
The controllers can accept a volt free signal from an external switch
/ timer (see Fig. 31) which will facilitate the switching between day
mode and night set back mode only. For setback the switch will be
in OPEN circuit and CLOSED for day - time operation. Each controller
type comes fitted with a link across the Switch. This link has to be
removed and replaced with the switch/timer connection all other
system parameters will have to be programmed into either a REHAU
CT2 Programmable Room Sensor or the REHAU FS/FC controller.
Connection of the external switch/timer, will override the
settings of any CT2 Programmable Room Sensors installed
onto the system.
Weather compensation is only possible with the REHAU FS/FC
controller coupled with the REHAU Outside Temperature Sensor.
Master Controller
SENSOR BUS
T
A maximum of 4 actuator heads can be installed into each output,
2 terminal blocks, 14 actuator max. per controller within the
controller as long as they are to be controlled by the same sensor.
+
T
+
SENSOR BUS
+ +
Outside Sensor
T
42
T
32. Connecting the out side sensor.
T
T
Connect + to + and
to
T
+
T
+
5.3.5 Connecting 4-Port Mixing Valve Actuator
FS/FC Master Controller
STRING NUMBER
(1-F)
UNIT NUMBER
(1-9)
2
5 4 3 2
4
9 8 7 6
1
5
9
D C B A
8
7 6
DIP SWITCH
ON
OFF
L
N
3
4
L
N
L
N
THERMAL ACTUATORS
5
L
6
N
L
7
N
L
8
N
L
N
DISPLAY
SUPPLY
SENSOR
L
N
MIXING VALVE
0 - 10V
THERMOSTAT BUS
+
T
2
N
1 2 3 4 5 6 7 8
+
T
1
L
Y
NETWORK
BUS
X
NETWORK
BUS
BOILER
B1 B2
C1
C2
1
230VAC
L
N
L
2
N
L
N
THERMAL ACTUATORS
3
4
L
N
L
N
6
5
L
N
L
7
N
L
8
N
L
N
EXT.
SWITCH
I
O
MIXING VALVE 24V AC
THERMOSTAT BUS
APP
SENSOR
+
T
N
+
T
L
+
T
SUPPLY
230VAC
The actuator is supplied with a 1 metre flying lead and connects
into the central control unit. The power supply to the actuator is 24v
coupled with 0 – 10v switching output signal.
ADD-ON
MODULE
WIRELESS
RECEIVER
LINK
MIXING VALVE
0 - 10V
T
+
55
The flying lead can be extended to a maximum distance between
valve actuator and REHAU FS/FC controller of 50 metres.
56
25 26
MIXING VALVE 24V AC
+
T
5.3.6 Connecting the Mixed Water Flow Temperature Sensor
(Limit Sensor)
This is required to control the mixing valve actuator modulation.
It senses the temperature of the mixed water to the manifold and
compares this with the programmed heat curve and modulates the
position of the paddle within the valve to either add flow or return
water to adjust the mixed flow temperature to the manifold.
3
0
1 0 F E
To enable the system to be weather compensated the supply
pipework to the manifolds must be fitted with a REHAU 4-port
modulating mixing valve and actuator.
4 Port mixing
valve with
Actuator
34. Connecting the 4-port mixing valve actuator
The temperature sensor is fitted onto the flow pipe out of the 4-port
mixing valve to the manifold using the flexible straps provided ensure
that the sensor is securely fitted to the pipe with no movement. The
sensor must be fitted at least 300mm away from the 4- port mixing
valve. The wiring of the sensor back to the REHAU FS/FC controller is
as shown in Fig. 33.
FS/FC Master Controller
SUPPLY
DISPLAY SENSOR
+
T
N
+
T
L
MIXING VALVE
0 - 10V
SENSOR BUS
Y
X
35. Removing the front cover (all sensor variants)
5.3.7 Connecting REHAU OC Sensor (Outside Temperature Sensor)
Limit Sensor
type ETF 1899
MIXING VALVE 24V AC
SENSOR BUS
APP
SENSOR
+
T
O
+
T
I
LINK
33. C
onnecting the mixed water flow temperature sensor
+
T
EXT.
SWITCH
The outdoor sensor should be positioned on a north-facing wall
away from any heat source e.g. boiler flue or any ventilation
extract outlet and at a height to prevent tampering.
This must be used if weather compensation is required. It is connected
to the REHAU FS/FC control unit and uses the 2 wire bus system to
communicate with the REHAU FS/FC control unit. The Outdoor Sensor
connects to the Sensor Bus in the same way as the sensors.
43
5.0
Control System Second Fix
5.4
Room Sensors internal connections
Sensors can be mounted directly onto the electrical back box either
flush or surface mounted. Remove the front cover of the sensor by
gently lifting the front cover. Remove the sensor fascia to expose the
fixing holes (Refer to Fig. 29 for connecting sensors, see page 41).
To Controller
+ +
Care must be taken not to damage the circuitry or the
components on the printed circuit board at this point. Care
should also be taken not to deform the sensor back plate when
fixing to the back box
TM Room Sensor
Remote air sensor
36. Sensor internal wiring with remote air sensor
Fix the sensor to the back box using the holes provided on the back plate
Do not over tighten the fixing screws and deform the back plate.
5.4.1 Connect the Wiring
Sensor types REHAU TP, CT, TA, TM & TD
All sensor types are connected dependent upon which wiring configuration
used on the first fix, refer to Fig. 29 (see page 41). When the wiring of the
sensor is complete refit the fascia plate and the sensor front cover.
CT2 Programmable Room Sensor must not be installed onto a
heating cooling system.
5.4.2 Remote Air Sensor Option (TM Sensor Only)
When the positioning of a room sensor is not practical. The REHAU TM
sensor offers the option of a remote air temperature sensor.
The remote sensor is positioned centrally within a standard single
back plate that is suitable for all standard electrical back boxes and
can be positioned up to 50m away from the sensor.
Unlike the REHAU TD floor sensor the remote air sensor is
only fitted when required and can only be used with the
REHAU TM sensor
Sensors with a remote air sensor have a mechanical jumper on
the right hand side of the printed circuit board controlling the
sensor function.
If the sensor is to be positioned within the space then leave the
mechanical jumper parked on one of the terminal pins. The sensor
should be supplied with the mechanical jumper in this position.
If remote air temperature reading is required then gently remove
the jumper and position it on both the terminal pins.
Temperature dial
Jumper in position for remote air sensor
Mode selection switch
The sensor is supplied in the standard operating mode (none remote,
internal jumper positioned on 1 pin see Fig. 37).
If the remote sensor option is required the internal jumper within the
sensor can be repositioned to cover both pins to provide this option (see
Fig. 37).
5.4.3 Connecting the Remote Air Sensor
The sensor is connected to the REHAU TM sensor as shown in Fig. 36.
When the sensor is fitted the REHAU TM sensor function will operate
in the same way
44
Temperature dial
Jumper in position for remote air sensor
Mode selection switch
37. Positioning jumper (side view of TM sensor)
5.4.4 Floor Sensor Option (TD Sensor Only)
Being able to control the minimum or maximum temperatures of
floors provides two functions. By controlling the maximum floor
temperature you can prevent over heating of the floor. This may
be required where special floor coverings are used. Controlling the
minimum temperature of the floor surface can create greater comfort
levels for the end user keeping the floor at a minimum temperature.
5.4.5 Connecting the Floor Sensor
Sensors requiring floor sensors wire up as shown in Fig. 38.
Sensors with a floor sensor have a mechanical jumper on the right
hand side of the printed circuit board controlling the minimum or
maximum temperature. The temperature limits are adjustable within
the sub menu of the FS/FC controller. If heating only is required then
this can be adjusted within the CT2 Programmable Room Sensor sub
menu (HiLo) see Fig. 39a for Jumper position.
If however, the floor sensor is connected to a REHAU CT2
Programmable Room Sensor as part of a group.
38. Floor Sensor
Note: The REHAU CT2 Programmable Room Sensor can be fitted with a
floor sensor. However this is an optional extra, and will require the floor
sensor as a separate part REHAU Art No. 225385.
Where REHAU TD sensors are installed within the system.
The floor limit sensor must be fitted or the system will not work
correctly.
If connected to a system fitted with a REHAU FS/FC controller these
limits can be adjusted using the FS/FC menu. Adjusting the limits
this way will control either the min/max temperatures for all floor
sensors within the group.
To Controller
Temperature dial
Jumper in position for max. floor surface temperature
Mode selection switch
+ +
Temperature dial
Jumper in position for min. floor surface temperature
Mode selection switch
TD ROOM SENSOR
Floor Sensor
39. Sensor internal wiring with floor sensor
39a. Positioning jumper (side view of TD sensor)
45
6.0
System Start Up and Operating
Instructions For Heating & Cooling
6.1
Mixing Valve Actuator
When all electrical connections have been completed, we
recommend the following procedure:
FS/FC Master Controller
STRING NUMBER
(1-F)
UNIT NUMBER
(1-9)
2
5 4 3 2
4
1
9 8 7 6
3
9
5
0
1 0 F E
D C B A
8
7 6
DIP SWITCH
ON
OFF
L
N
3
4
L
N
L
N
THERMAL ACTUATORS
5
L
6
N
L
7
N
L
8
N
L
N
DISPLAY
SUPPLY
SENSOR
L
N
MIXING VALVE
0 - 10V
THERMOSTAT BUS
+
T
2
N
+
T
1
L
1 2 3 4 5 6 7 8
Y
NETWORK
BUS
X
NETWORK
BUS
BOILER
B1 B2
C1
C2
1
230VAC
L
N
L
2
N
L
N
THERMAL ACTUATORS
3
4
L
N
L
N
5
L
7
6
N
L
N
L
8
N
L
N
EXT.
SWITCH
I
O
MIXING VALVE 24V AC
THERMOSTAT BUS
APP
SENSOR
+
T
N
+
T
L
+
T
SUPPLY
230VAC
ADD-ON
MODULE
WIRELESS
RECEIVER
LINK
MIXING VALVE
0 - 10V
T
+
55
56
6.1 Mixing Valve Actuator.
The actuator (F) is supplied with the drive in mid position (45° of
rotation) and the manual button (E) in the AUTO position. Do NOT
fit the actuator to the valve at this time. Initially connect the brown
and blue wire ONLY from the actuator to the controller. Switch on
the power to the controller and the actuator will travel fully in both
directions (to find the extent of travel) and then take up the ‘0’ or OFF
position. This may take 3 – 4 minutes from the initial position. The
direction of drive to open the valve will be clockwise.
25 26
MIXING VALVE 24V AC
4 Port mixing
valve with
Actuator
T
+
The actuator is designed for the control from a 24v supply
with a 0-10vdc-control drive as supplied by the REHAU FS/FC
Master Controller.
The electrical cable supplied is connected as follows:
Blue
24v Neutral
Brown 24v supply
40. Variable temperature wiring
Black 0-10v control drive.
Red not used and must be made electrically safe.
- Connect the live (brown) wire of the actuator to the “+” terminal of
the mixing valve connection inside the control centre
- Connect the blue (neutral) wire of the actuator to the “ I ” terminal of
the mixing valve connection inside the control centre
- Take the black (0-10V) wire of the actuator to the “Y” terminal of the
mixing valve connection inside the control centre.
46
6.0
System Start Up and Operating
Instructions For Heating & Cooling
6.2
Setting the HEated/Cooled Zones (Channel numbers)
Set the channel selector in all the sensors so
that it corresponds with the thermal actuator
output that it must activate.
Each sensor on the system is to be allocated a
channel number.
Under the front cover of all sensors a selector
can be accessed. (As shown in Fig. 42). The
number of its output (its CH channel number)
can be set with a screwdriver. The channel
selection on all sensors can be carried out
without the sensor being supplied with power.
However, when the power is on, the sensors
will need to be given channel numbers and a
sensor check has to be enabled (Turn on DIP
3 on the FS/FC Controller) on the REHAU FS/
FC Master Controller to ensure all sensors are
recognised.
A sensor set to CH 1 will activate the thermal
actuators connected to output TH1 within
the controller. This will control the actuators
connected to that zone. For channel numbers
10 to 14, use the letter designation A to E. 10 =
A, 11= B, 12 = C etc.
0
%
MASTER
Channel 15 is a common channel any Sensor
set to this channel will override all automatic
functions of the REHAU FS/FC controllers and
REHAU CT2 Programmable Room Sensors with
a single function.
Up to 13 slave sensors can be controlled by one
REHAU CT2 Programmable Room Sensor. The REHAU
FS/FC Master Controller can only accept 8 heated
zones inputs (see Fig. 42a for channel number
allocation). If additional heated zones are necessary,
an REHAU Add On Module must be utilised.
For Channel 0 see section 10.3
Number of zones
FS/FC
Controller
Add On
Modules
Up to 8 Zones
1
0
9 to 14 Zones
1
1
41. of REHAU CT showing front
cover layout
A) Display
B) Down Adjustment
C) OK - Accept
D) Up Adjustment
E) Reset to factory settings
F) Pin button for clock adjustment
Add On - MODULE
7
7
8
8
1
TH1
2
TH2
9
9
3
TH3
A
10
4
TH4
B
11
5
TH5
C
12
6
TH6
D
13
7
TH7
E
14
8
TH8
42. Channel allocation setting
42a. Controller number designation Within the sensors when used with REHAU Add On Module. This Add On Module can
control 6 extra head zones
47
6.0
System Start Up and Operating
Instructions For Heating & Cooling
6.3
Setting up the REHAU FS/FC Controller (HEATING)
The FS/FC controller come with pre-set temperatures.
With the REHAU FS/FC controller the pre-set figures can be adjusted –
the use of a REHAU CT2 Programmable Room Sensor is optional with
the REHAU FS/FC controller. However if a REHAU CT2 Programmable
Room Sensor is fitted to the system it will override the fixed and the
programmed parameter set in the REHAU FS/FC controller.
The master control has the following default temperature settings:
(A REHAU CT2 Programmable Room Sensor, fitted has no
effect on the weather compensation settings)
6.3.1 Adjusting the Pre-Set Default Temperatures in the
REHAU FS/FC Controller;
After the system has been powered up via the main heating
system switch fuse spur or isolation switch. By using the up &
down buttons you can move through the main menu and into the
sub menus to manually adjust the pre-programmed settings. The
description of these sub-menus is detailed below.
For the FS/FC Master Controller with display, the set points can be
altered on the display
Default settings on the FS/FC Master Controller
Description
Symbol
Factory settings
Day temperature
21°C
Night temperature
18°C
Off Temperature (Frost protection)
5°C
Floor Limit temperature, high
27°C
Floor Limit temperature, low
17°C
Max water temperature
Weather compensation cold (winter)
Weather compensation warm (summer)
55°C
Outdoor Temperature
-3°C
Water temperature
45°C
Outdoor Temperature
25°C
Water temperature
30°C
The above set values can be altered
FS/FC Master Controller controls only temperature settings and
there is no time control. If a REHAU CT2 Programmable Room
Sensor is NOT fitted on the system an external time clock will
be required to control the time switching of the system.
48
6.3.1 Adjusting the Pre-Set Default Temperatures in the REHAU FS/FC Controller
Function
Day Temperature (
)
Factory Setting
To modify
21°C
1. Locate the day temperature symbol by pressing the Up & Down buttons until the (
) symbol appears.
2. Press ( ) to enter. The temperature reading is now flashing. Using the Up & Down buttons, alter the
temperature to that required.
3. Press (
Night Temperature
(Set back temperature). (
18°C
)
) to accept. This will control the daytime temperature set-point of all sensors on the system.
This allows temperature reductions at times of unoccupancy or at night when the heat demand for can be reduced.
The REHAU FS/FC Master Controller can accept a volt free signal from an external switch (timer) which will facilitate
the switching between day mode and night set back mode. For setback the switch will be in OPEN circuit and
CLOSED for daytime operation. Each controller type comes fitted with a link across the TIME terminal. This link has
to be removed and replaced with the switch/timer connection.
1. Locate the night temperature symbol (
temperature reading is now flashing.
) by pressing the Up and Down buttons then press (
2. Using the Up & Down buttons alter the temperature to that required Press (
Night-time temperature set-point of all sensors on the system.
OFF Temperature
(Frost protection) (
5°C
)
1. Locate the OFF temperature symbol (
temperature reading is now flashing.
Maximum Floor Temperature
(TD sensors only) ( )
28°C
Minimum Floor Temperature
(TD sensor only)( )
17°C
).The
) to accept. This controls the
1. Locate the maximum limit temperature symbol by pressing the Up and Down buttons then press the (
).
2. The temperature reading is now flashing. Then using the Up & Down buttons to adjust the temperature to that
required. When completed press the ( ).This controls the maximum floor temperature of all floor sensor sensors
on the system.
1. Locate the minimum limit temperature symbol by pressing the Up and down buttons then press (
temperature reading is now flashing.
2. Using the Up & Down buttons alter the temperature to that required. Press (
minimum floor temperature of all floor sensor sensors on the system.
Maximum Water Temperature (
) to accept. This controls the
) by pressing the Up and Down buttons then press (
2. Using the Up & Down buttons, adjust the temperature to that required. Press (
OFF temperature for all sensors on the system.
). The
)
25°C
). The
) to accept. This controls the
1. For initial system warm up set the maximum flow temperature to 25°C (See Commissioning section 7) Locate
the maximum water temperature symbol ( ) by using the Up & Down buttons
2. Press ( ). The temperature reading is now flashing. Alter the temperature to that required for the type of
system installed.
3. Press (
Setting the Outside Winter
Temperature
(Heat Loss Design
Temp)
-3°C
) to accept. This controls the maximum mixed water temperature supplied to the system manifolds.
1. Locate the winter compensation symbol (
) by pressing the Up & Down buttons then press (
).
2. This gives access to a sub menu. In the sub menu the outside winter temp sensor temperature symbol (
be shown.
) will
3. You adjust this by pressing ( ).The temperature reading is now flashing. Using the Up & Down buttons set this
to the required winter external temperature.
4. When completed press the ( ). This sets the outside winter system design temperature on which the
compensated heating curve will be based.
49
6.0
System Start Up and Operating
Instructions For Heating & Cooling
6.3
Setting up the REHAU FS/FC Controller (HEATING)
Function
Factory Setting
To modify
Setting the Winter Water
Temperature
45°C
1. Locate the winter water temperature symbol (
temperature reading is now flashing
) by pressing the Up & Down buttons. Press (
). The
2. Then using the Up & Down buttons to adjust the water temperature to that designed for the system.
3. Press (
) to accept. This sets the temperature of the mixed water flow into the system.
4. When this is completed you will have to return to the main menu by pressing the down arrow to the Return
symbol ( ).
Setting the Outside Summer
Temperature
25°C
To allow the water temperature ramp to be calculated you will need to input into the system the summer air and
water temperature required. This will be in the region of 25°C air 30°C water.
1. Locate the summer compensation symbol (
gives access to a sub menu
) by pressing the Up and Down buttons. Press the (
2. In the sub menu locate the outside summer temperature sensor symbol (
reading is now flashing
). This
) will be shown. The temperature
3. Then using the Up & Down buttons to adjust the water temperature to that designed for the system.
4. Using the Up & Down buttons set this to the required summer external temperature. When completed press the
( ) to accept. This sets the outside summer design temperature on which the compensated heating curve will be
based. This is usually 25°C.
Setting the Summer Water
Temperature
30°C
1. Locate the water temperature symbol (
) by pressing the Up & Down buttons.
2. Then press ( ). The temperature display is now flashing. Using the Up & Down buttons adjust this to the
required temperature.
3. Press the ( ) to accept. This sets the temperature of the mixed water into the system. This should be set to the
summer supply flow temperature required when the outdoor temperature is achieved i.e. outside temperature 25°C
water temperature 30°C.
4. When this is completed you will have to return to the main menu by pressing the down button to the Return
symbol ( ).
Programming of the FS/FC Master Controller is now complete
Service Menu (
)
-
1. Press the ( ) to enter the service mode. The first display shows the loaded software version. The software
version loaded onto the controller i.e.
2. Press the Down button to show the next display
there is an error.
/+
If the OK is displayed, there are no faults. If ‘E’ is displayed
3. Press the ( ) to show the next display. This will identify on which
channel the error has occurred. This display will also show which
channels are in use. Press the ( ) to show previous display.
4. Then press the Down button to enter The outdoor temperature display
18°C.
5. Press the Down button to show the next display
34°C this shows the actual mixed water temperature.
6. Press the Down button to show the next display
for the supply water temperature.
35°C This shows the calculated set point by the controller
7. Press the Down button to show the next display
8.2V . This shows the mixing valve position (0-10v). 10v
indicates the mixing valve to be fully open.
8. Press the Down button to show the next display . This will display the temperature of each zone including floor
temperature sensor maximum & minimum temperatures. Press accept ( Ó ) and Up or Down button to select
room. If a limit sensor is connected the measured temperature is shown, above (maximum) or below (minimum) the
room temperature. The room temperature is shown in the middle.
9. To exit the service menu at any time press the Up or Down button then press accept ( ) to return to the main
menu.
50
6.0 System Start Up and Operating
Instructions For Heating & Cooling
6.4
Weather compensation (HEATING)
1. Factory setting
2. Example of user setting
MAX’ FLOW WATER
Winter -3°C (outdoor temperature)
= Water temperature > 45°C
Summer 25°C (outdoor temperature)
= Water temperature > 30°C
43.
6.4 Weather Compensation (HEATING)
Weather compensation can only be achieved if the REHAU OC outdoor compensation
module, temperature sensor & 4-port mixing valve is installed with a REHAU FS/FC
controller.
For the controller to calculate the required flow temperature, dependent on external
temperature, the design parameters are required. This will be the design flow
temperature (given on the UFH Design) and the design external air temperature for
the location, usually for the UK & ROI –3°C to –4°C.
Example
When the external temperature is at its minimum –3°C the water temperature will
be at the maximum required design temperature e.g. 45°C. The higher the external
temperature is from the external winter temperature set-point the lower the mixed
flow temperature will be. (As shown in Fig. 43).
51
6.0
System Start Up and Operating
Instructions For Heating & Cooling
6.5
Setting up the FC Controller (COOLING)
Automatic Switching between operating modes heating/cooling
The REHAU FC controller is an independent Floor heating / Floor
cooling control system. It is capable of switching the system from
heating to cooling and back to heating automatically based on set
parameters and climatic conditions. Thus being able to give an output
demand signal to boiler, chiller or a reversible heat pump.
To enable this to happen, important information has to be
programmed into the controller to enable the cooling criteria to be
calculated by the controller and therefore operate to provide the
comfort required when in cooling mode.
The activation of automatic cooling mode is influenced by the
following input parameters:
1. Mean value of outside temperature
2. Actual value of outside temperature
3. Actual value of room temperature
4. Change of room temperature
The controller is supplied with pre programmed settings. In most
case these settings will be suitable for the majority of heating /
cooling applications. However, if adjustment of these parameters
is required then follow the instructions below.
The only changes that maybe required in order to achieve project
specific parameters and customer comfort conditions are:
(B) Cooling room thermostat Offset to heating set-point temperature.
(C) Night Setback Temperature (NSB).
(D) System operating mode selection.
(E) Rooms where Cooling is to be allowed.
(I) Minimum allowed system water temperature.
(J) Delay time between heating & cooling
Instructions to change the cooling settings
Using the up and down buttons on the FC locate the (A) symbol
then press the ( ). This will allow access into the cooling
systems settings sub menu. The settings, their function and the
function symbol are listed below.
Function
Description
Factory Setting
To modify
(B) Offset to Day
Temperature
This function prevents the need to adjust the temperature
settings on the sensors from winter to summer temperatures.
This allows all the connected sensors within the controller to
have a positive offset temperature to the set day temperature set
within the controller
3°C
Using the ( ) button to enable the adjustment
or the required offset temperature and the up &
down buttons to select the required temperature
and then press the ( ) button to confirm the
offset temperature can be adjusted between
0°C to +6°C in .½°C increments.
e.g. If the Controller has a heating day temperature set point is
21°C (see section 6.3.1) then in cooling mode the controlled
cooling temperature within the space will be 24°C (21+ 3)
(C) Night Setback
Temperature (NSB)
The cooling setback function will operate at whatever NSB
temperature set within the cooling control sub menu in the
controller above the room set-point temperature when in cooling
mode.
3°C
Using the ( ) to enable the adjustment and
the up & down buttons to select the required
temperature and then press the ( ) button to
confirm the offset temperature can be adjusted
between +2°C to + 6°C in .½°C
(D) Calculated Dew Point
The display shows the calculated dew point temperature in °C
based on the input data being received by the controller
Calculated based on
humidity
This is a readout figure only and cannot be
adjusted.
(E) Measured Maximum
Humidity
The display shows the calculated humidity percentage based on
the input data being received by the controller.
Calculated based on
humidity
This is a readout figure only and cannot be
adjusted.
(F) Status
The value will indicate if the system is in heating or cooling mode.
Read out only
-
52
Function
Description
Factory Setting
To modify
(G) System Mode Selection
This option will allow the function of the controller to be set the
controller can be operated in the following modes
0 = BMS - Will only operate on demand from a BMS system
1 = Auto - the controller will dictate whether its in heating or cooling
2 = Cooling - The system is in permanent cooling
3 = Heating - The system is in permanent heating
3
Using the ( ) to enable the adjustment and
the up & down buttons to select the required
temperature and then press the ( ) to
confirm either (0,1,or 2).
(H) Cooling Allowed
The cooling allowed option will enable zones/rooms within the
project to be including the Floor cooling function This gives
flexibility throughout the project to isolate area when necessary
e.g. in areas of high humidity like bathrooms and kitchens.
All rooms selected
to OFF (no Cooling)
The room selection is
based on the sensor
channel number
Using the ( ) to enable the room selection
and the up & down buttons to select the
required room and then press the ( ) to
alter the ON (for cooling) or OFF (no cooling)
selection. To escape this menu use the up
button to and position the cursor to the OK icon
then press ( ).
(I) Distance from
Calculated Dew Point
This is the adjustable safety temperature from dew point as
calculated by the controller. The safety factor can be adjusted
between +1°C to 5°C.
2°C
To change this temperature use the ( ) to
enable the adjustment and the up & down
buttons to select the required temperature and
then press the ( ) to confirm.
When the controller detects that the room temperature is
within the pre-set value above dew point then the controller
will stop cooling with a delay time before fully closing the
mixing valve actuator to prevent the formation of condensation
on the surfaces.
(J) Exceeded Dew Point
Temperature
To prevent the mixing valve closing due to short term raises in
humidity there is an adjustable time allowance where the room
temperature can be within the preset safety temperature above
dew point for a short period.
10 mins
(0 to 60 mins)
To alter this time setting use the ( ) to enable
the adjustment and the up & down buttons to
select the required temperature and then press
the ( ) to confirm.
(K) Dew Point Delay Time
Once the conditioned in (F & G) have been reached and therefore
cooling has stopped by the closing of the mixing valve there is a
further safeguard. This setting will dictate the time lag before the
cooling system can operate again.
20 mins
(0 mins and 120 mins)
To alter this time setting use the ( ) to enable
the adjustment and the up & down buttons to
select the required temperature and then press
the ( ) to confirm.
(L) Minimum Allowed
Cooling Water Temperature
To prevent uncomfortable space conditions being experienced it
is recommended that the floor surface temperature in the cooled
zones should not drop below 20°C.
14ºC
To alter this temperature setting use the ( )
to enable the adjustment and the up & down
buttons to select the required temperature and
then press the ( ) to confirm.
8 hrs
(15 mins to 72 hrs in
15 min intervals)
To alter this time setting use the ( ) to enable
the adjustment and the up & down buttons to
select the required delay time and then press
the ( ) to confirm.
To achieve this, the control system has a minimum allowed
water temperature function. This would prevent water under
the designed cooling water temperature from entering the floor
cooling circuits. It should therefore be set to the cooling flow
temperature shown on the REHAU design.
Alternatively if the installation has been installed using REHAU TD
sensors with floor sensors to all cooled zones then the system
will respond to the floor temperatures.
(M) Delay Time Between
Heating & Cooling
To prevent uncomfortable space. This is the neutral zone when
the system is not in cooling or heating operating mode. It is to
prevent the system from cycling between heating and cooling
mode during a short time period. A timed delay has to be
programmed into the controller. This delay time will prevent the
heating system becoming operational for a set time period after
the controller has determined that the cooling criteria has no
longer been satisfied.
53
6.0
System Start Up and Operating
Instructions For Heating & Cooling
6.5
Setting up the FC Controller (COOLING)
6.5.1 Setting up Dehumidifier on the Master Connection
FC Master Controller
STRING NUMBER
(1-F)
UNIT NUMBER
(1-9)
5 4 3 2
L
N
L
N
L
N
L
N
L
N
L
4
9 8 7 6
1
N
2
L
3
N
5
9
OUT PUT 1 Out put 2 Out put 3 Out put 4 Out put 5 Out put 6 Out put 7 Out put 8
L
0
1 0 F E
D C B A
8
7 6
DIP SWITCH
ON
N
OFF
1 2 3 4 5 6 7 8
THERMAL ACTUATORS 24V
L
N
3
4
L
N
L
N
THERMAL ACTUATORS
5
L
6
N
L
7
N
L
8
N
L
N
DISPLAY
SUPPLY
SENSOR
L
N
MIXING VALVE
0 - 10V
THERMOSTAT BUS
+
T
2
N
+
T
1
L
Y
NETWORK
BUS
X
NETWORK
BUS
N
SEC. PUMP
230VAC
L
1
N
L
2
N
L
N
THERMAL ACTUATORS
3
4
L
N
L
N
6
5
L
N
L
7
N
L
8
N
L
N
EXT.
SWITCH
I
O
LINK
THERMAL ACTUATORS 24V
OUT PUT 1 Out put 2 Out put 3 Out put 4 Out put 5 Out put 6 Out put 7 Out put 8
L
N
L
N
L
N
L
N
L
N
L
N
L
N
L
MIXING VALVE 24V AC
THERMOSTAT BUS
APP
SENSOR
+
T
X-RELAY
C1 C2
+
T
L
BOILER
B1 B2
+
T
SUPPLY
230VAC
ADD-ON
MODULE
WIRELESS
RECEIVER
N
DIP SWITCHES
Blue
N
Connection to
Dehumidifier
Green/ Yellow
44. Typical Wiring Schematic for Dehumidifier requiring 230V signal using a 24V Relay
54
DIP Switch 7 turned to 'ON' on the
Master Controller to enable dehumidifier
when humidity exceeds a set point
RESERVED
DEHUMIDIFIER
X - RELAY
L
L
Brown
N
230V AC
Mains
Supply
1 2 3 4 5 6 7 8
BOILER TEST
OFF
12
nc
SENSOR CHECK
INITIAL HEAT UP
SEQUENCE
24 V RELAY
11
14
no
ON
A2
INSTALL MODE
A1
Only Output 1 on the Master Controller
can be used for switching the Dehumidifier
7.0
CommIssIonIng
The definition of commissioning, according to CIBSE
(Chartered Institution of Building Services Engineers) is the
advancement of an installation from static completion to
working order to specified requirements.
The commissioning of a system is essential to obtain the design
operating parameters of the FH system as set out by the system
designer. Co-operation between all parties involved with the design
and installation of the FH and control system is essential.
Sufficient time and resources has to be allowed for the full
commissioning process of the installation to be completed.
7.1 Pre-commissioning Requirements
- Balance the flow rate through the circuit valves on the manifold.
- Confirm with the installer that the boiler commissioning has been
carried out as instructed in the boiler manufacturer’s installation and
servicing instructions.
- Confirm with the installer that the chiller unit commissioning has
been carried out as instructed and in accordance with the chiller
manufacturer’s installation and servicing instructions.
- Confirm correct operation of the system controls including the
sequencing of the pumps, valves, boiler and chiller.
7.2 Automatic Initial Heating System Warm Up
FS/FC Master Controllers include a special “automatic heat up sequence”, which allows the temperature of the supply water to be controlled via
the mixing valve to allow correct compliance with BS EN 1264 Initial Heat Up.
To start initial heat up sequence:
1. Set DIP-4 to “on”.
2. This will set the supply water temperature at 23°C for three days and
will fully open the entire manifold actuators.
3. Then for a further four days the water will be supplied at the
maximum supply water temperature, as set in the REHAU FS/FC Master
Controller menu and during this period the manifold actuators will
remain fully open.
4. When the FS/FC Master Controller is operating in the commissioning
function, this is indicated by the output LED’s flashing in rotation and
with the word “commissioning” flashing in the display.
DIP Switch 4 turned to ‘ON’ on the master controller to start initial
heat up sequence in accordance with BS EN 1264
5. The commissioning function time periods are paused if the power
supply is interrupted.
6. Should you need to restart the commissioning from the beginning,
switch DIP-4 to “OFF” and back to “ON”.
Supply Water Temperature
7. To de-activate the function switch DIP-4 to “OFF”.
Max.
This function conforms to BS EN 1264-4.
23ºC
1
2
3
4
5
6
7
Days
55
7.0
Commissioning
7.3 Initial System Start Up for Cooling Systems
It is important that the initial heating system start up procedure (section
7.2, see page 55) is carried out prior to the operation of the cooling
system. Even If the cooling system is to be commissioned in the
summer months.
7.4 The Commissioning Team normally Consists of
- FH installer
Confirm that the system operating input parameters listed below have
been set into the FS Master Controller sub menu (see section 6.5)
- Commissioning engineer
(B) Offset to Day Temperature
(C) Night Setback Temperature (NSB)
(G) System operating mode selection
(H) Rooms where Cooling is to be allowed
(L) Minimum allowed system water temperature
(M) Delay time between heating & cooling
56
- FH control system installer / electrician
- B oiler, chiller and main system controls installer / electrician
- M & E contractor
8.0 Ct sEt UP gUIdE
8.1
PRogRAmmAblE Room sEnsoR, domEstIC Hot wAtER,
RAdIAtoR And two stAgE ContRollER
CT2
CT2 / 2
Programmable Room Sensor, CT2 / R
Radiator Controller, CT2 / HW
Two Stage Controller
Domestic Hot Water Controller
The user guide applies for all the controllers mentioned above,
with certain instructions only for specific controllers.
CT2 Programmable Room Sensor not to be used with
FC Master Controller
A:
B:
C:
Display
Adjustment down
OK - accept
D:
E: R
F:
Adjustment up
Reset to
factory setting
Pin button
adjust of clock
45. REHAU CT2 Programmable Room Sensor/Controller showing front cover layout
The REHAU CT2 Programmable Room Sensor Controller has 3 main buttons to navigate: UP
1
2
3
4
5
6
7
, DOWN
and ENTER
(circled).
0:00
G:
H:
I:
Automatic mode
Manual mode
Time and Temperature
Day Number
1 2 34567
J:
K:
".
1234567
".
".
1234567
4-event symbol
Wake
Night
".
1234567
Out
Home
46. REHAU CT2 Programmable Room Sensor/Controller
57
1.
1
2
3
4
5
6
7
1
2
3
4
5
6
7
The time will have to be set as soon as the CT2 Programmable Room Sensor is switched on for the
first time, the hour digits start to flash.
:00
1.1a To change the hours on the clock, use the
default) and then press .
and
to select the correct hour (24 hour clock is
I I:00
1.1b Then the minutes will start to flash, adjust as above and press
1
2
3
4
5
6
7
2
3
4
5
6
7
to confirm.
I I:23
1.2
The day of the week then has to be set.
Number 1 on the top left of the screen will flash, select the correct day by using
the up and down arrows. 1 is Monday, 2 is Tuesday....6 is Saturday, 7 is Sunday.
Press to confirm.
1.3
This shows the channel numbers for the following zones:-
I I:23
To set which channels the CT2 Programmable Room Sensor controls, press
first zone CH 1.
58
1.4
Use the UP and DOWN arrows to either select ON.
1.5
or OFF.
Press
to confirm, then the next channel will appear.
to select the
1.6
Repeat for each channel as desired.
To leave this menu, either go through all 14 channels and press ESC (below) or don’t press any
buttons for 10 seconds and it will revert to main screen.
1.7
To quit a sub-menu at any time, navigate the menus until you reach ESC and press
.
N.B. Steps 1 - 3 are a requirement to enable the correct operation of the control system.
Steps 4 - 8 are optional.
1.8
The date and time are now set.
2
I I:23
N.B. Time has to be manually changed between BST and GMT.
to change the default time settings.
2.
The default time events are shown below, if you do not wish to change them, proceed to step 3.
If you do wish to change them, follow step 2.
47. Event-clock mode
DAY 1-5
TIME
TEMPERATURE
Day
Out
In
Night
06:00
08:00
16:00
22:30
21°C
15°C
22°C
18°C
DAY 6-7
TIME
TEMPERATURE
Day
Night
08:00
23:00
22°C
15°C
4 Event Sequence
High limit temperature
Low limit temperature
Scale
4.5.2
50°C (DHW)
30°C (DHW)
50°C (DHW)
30°C (DHW)
50°C (DHW)
30°C (DHW)
29°C (CT2 Programmable Room Sensor only)
17°C (CT2 Programmable Room Sensor only)
24hr/°C
N.B. All event times must be in the same 24hr period.
REHAU recommend a 2 hour warm up / cool down time for your underfloor heating, e.g. to be warm at
7am, start the first event, DAY, at 5am.
4-event clock mode/
automatic mode:
In automatic mode, the clock function symbol ( ) and one of the 4-event symbols (
indicated.
Comfort mode:
5 secs.
) will be
Temporary override
To temporarily override any temperature in the 4-event schedule program, press the UP ( ) button once,
to show the temperature in the display, and press UP ( ) or DOWN ( ) again to increase or decrease the
temperature. The display will flash for 5 seconds, and will then revert to the time. The override will operate until
the next programmed event when the sensor will resume the automatic programme.
Cancel comfort mode
To cancel the temporary override, press the OK ( ) button twice.
Manual mode:
5 secs.
Permanent override
During holidays, the scheduled 4-event program can be overridden.
Press the OK ( ) button, and then the UP ( ) or DOWN ( ) button until the override temperature is set.
The set temperature will remain in the display and the unit will now operate to this temperature permanently.
Cancel comfort mode
To cancel the permanent override state press the OK ( ) button once, and the unit will resume automatic
function.
59
1
2
3
4
5
2.1a Hold the button for 3 seconds.
This screen will be displayed. This shows the start time of the first event, DAY, which is the first time
the heating comes on.
If this is to be changed, use the UP and DOWN arrows like when setting the time.
If it is not to be changed, press
1
2
3
4
5
twice to move on.
2.1b This is the temperature for the DAY event.
to continue.
Adjust if required as above. If not press
N.B. If no buttons are pressed for a while, the CT2 Programmable Room Sensor/Controller will revert
back to the main screen and you will have to start again.
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
60
2.2a The time the second event starts - OUT.
Adjust if required as above. If not press
twice to continue.
2.2b This is the temperature of second event - OUT.
Adjust if required as above. If not press to continue.
2.3a The time the third event starts - IN.
Adjust if required as above. If not press
twice to continue.
2.4b The temperature for the third event - IN.
Adjust if required as above. If not, press
to continue.
2.5a The time for fourth event to start - NIGHT.
Adjust if required as above. If not press
twice to continue.
2.5b The temperature for fourth event - NIGHT.
Adjust if required as above. If not, press
to continue.
2.6a Days 6 and 7 (Saturday and Sunday) only have 2 events - DAY and NIGHT.
This screen shows the start time of day event.
6
7
Adjust if required as above. If not press
twice to continue.
2.6b The temperature for DAY event at weekend.
Adjust if required as above. If not, press
to continue.
6
7
2.7a The time which the NIGHT event starts at weekend.
twice to continue.
Adjust if required as above. If not press
6
7
1
2
3
4
5
2.7b The temperature for the NIGHT event.
Adjust if required as above. If not, press
to continue.
2.8
Once the settings are completed, the CT2 Programmable Room Sensor/Controller returns to the
standard screen, showing time, day and current event.
3.
temporary override (to change current temperature temporarily)
2
Press the UP button once, the temperature then flashes.
Adjust to desired temperature with UP and DOWN buttons. The display then flashes for 5 seconds
and then reverts back to main screen.
To cancel, press
twice.
3.1
Permanent override (e.g. occupants go on holiday)
Press
on main screen.
Use UP and DOWN buttons until desired temperature reached. Press
to confirm.
The display will remain on the override temperature until it is cancelled.
To cancel, press
once.
61
4.
Changing event sequence over different days (if required)
Hold UP and DOWN buttons to reach sub-menus.
Scroll through and press
on Pro.
The 5 possible sequences below can be scrolled through and selected by
4.1a 4 events on 5 days, 2 events on 2 days (default).
1
2
3
4
5
4.1b 4 events on 6 days, 2 events on 1 day.
1
2
3
4
5
4.1c 4 events for 7 days.
1
2
3
4
5
6
7
4.1d 2 events for 7 days.
1
2
3
4
5
6
7
4.1e 2 events for 5 days, 1 event for 2 days.
1
2
3
4
5
5.
setting Floor sensors (only available on Ct2 Programmable Room sensor)
Hold UP and DOWN buttons to reach sub-menus.
Scroll through and press on
on HiLi.
62
.
5.1
Adjust maximum floor sensor temperature with UP and DOWN buttons, press
to confirm.
N.B. Only a maximum OR minimum floor sensor can be fitted to each CT2 Programmable Room Sensor, not both.
5.2 Select LoLi if minimum floor sensor fitted.
5.3 Adjust minimum floor sensor temperature as above.
6.
to see Current sensor Info
Hold UP and DOWN buttons to reach sub-menus.
Scroll through and press
on InFo.
6.1
The first screen shows the software version.
6.2
Press DOWN to show current room temperature.
Press DOWN again to show floor temperature (if floor sensor fitted).
Press
to return to main screen.
1
1
N.B. No values can be changed in InFo.
7.
Changing the scale from °C to °F and 12-24hr
Hold UP and DOWN buttons to reach sub-menus.
on SCAL.
Scroll through and press
This allows you to change the clock and the temperature units.
63
7.1
Press UP and DOWN to scroll through options and
to select desired scale.
The first is 24 hour clock and temperature in celsius.
1
2
3
4
5
6
7
AdAP
7.2
24 hour clock and temperature in fahrenheit.
7.3
12 hour clock and temperature in celsius.
7.4
12 hour clock and temperature in fahrenheit.
8.
Turning on Adaptive function ensures that the room will reach the correct temperature at the
desired time.
Hold UP and DOWN buttons to reach sub-menus.
Scroll through and press
on ADAP.
8.1a Use the UP and DOWN arrows to either select ON.
8.1b or OFF.
Press
64
to confirm, then the next channel will appear.
Below only required for CT2 / 2 Controller (Two Stage Controller)
9.
1
2
3
4
5
6
7
To change advanced settings on the two stage controller
Advanced settings on two stage controller. Using these settings, the secondary heat source could be
turned on if the room does not reach the correct temperature in the desired time. An example would
be to bring the second stage if temperature has not reached 2°C of the set point within 30 minutes
Hold UP and DOWN buttons to reach sub-menus.
Scroll through and press
on 2 ST
9.2a Use the UP and DOWN arrows to either select ON.
9.2b or OFF.
Press
1
2
3
4
5
6
7
1
2
3
4
5
6
7
1
2
3
4
5
6
7
1
2
3
4
5
6
7
to confirm, then the next channel will appear.
9.3
‘LEAP’ will start to flash on the screen, press
to confirm.
9.4
Use the UP and DOWN arrows to set the temperature between 0 to 10°C, press
9.5
‘EINE’ will start to flash on the screen, press
9.6
Use the UP and DOWN arrows to set the time between 0 to 2hrs, press
LEAP
to confirm.
2.0C
to accept.
EINE
to confirm.
I:00
65
9.0
Domestic Hot water (DHW),
Radiators and Two stage controller
9.1
Domestic Hot water (DHW)
HWS
Hot Water Supply
CT2/HW
CT2/HW Domestic Hot Water Controller
SV
Safety Valve
HWS
ZV
Zone Valve
Hot Water Sensor
Junction
Box
HLSSupply High temperature
Limit Thermostat
HWS Hot Water
HW
HotCT2/
Water
CT2/R RadiatorAVControllerAir Vent
Cylinder
AV
Controller semsor (Flow)
CT2/HW Domestic
TS Hot WaterTemperature
HWS
Hot Water Sensor
Safety Valve
SV
CP
Circulating Pump
Zone Valve
ZV
BPV
By pass Valve
Cylinder
AV
High temperature Limit Thermostat
HLS
SV
Safety Valve
Air Vent
AV
CP
PV semsor
Pressure
Temperature
(Flow) Vessel
TS
CS Pump Cylinder Sensor
Circulating
CP
ZV
Junction Box
By passRS
Valve
Room Sensor
BPV
Safety Valve
PV
SV
TMV
Thermostatic Mixing Valve
CP
Pressure Vessel
PV
CP
Cylinder Sensor
CS
4 Port Mxing Valve
ZV
Room Sensor
RS
PV
Outside Sensor
BPV
OC
Boiler
SV
Lockshield Valve
LSV
CP
Thermostatic Radiator Valve
TRV
Boiler
BA Master Controller
FS/FC Controller
RS
CP
HLS
TS
Manifold Flow Header
OC
RS
TS
ZV
Manifold Flow Header
Manifold Return Header
TMV
Manifold Return Header
BPV
48. Hydraulic Schematic for REHAU CT2/HW Hot Water Controller
Constant Flow Water Temperature system with 'S' plan Integration
Installation
A 2-port zone valve is installed on the primary supply from boiler
to storage cylinder, and this is wired to a 24V Relay, which is
controlled by the output of the REHAU FS/FC controller. The
channel output number is set in the REHAU CT2/HW controller.
Master Controller
RJ45
NETWORK BUS
NETWORK BUS
ADD-ON
MODULE
WIRELESS
RECEIVER
*This may be reduced to a lower setting if solar generation of hot water is employed, so
that best use is made of the “free” energy produced by the solar heating
**For altering the default settings please refer to section 8.0
66
N
L
N
L
N
L
N
N
L
N
L
N
L
N
DISPLAY
SUPPLY
SENSOR
L
THERMAL ACTUATORS 24V
L
L
N
L
N
L
N
L
N
EXT.
SWITCH
I
O
N
A1 A2
11
Brown
Blue
Green/ Yellow
14
no
12
nc
+
+
+
+
Y
NOT USED
Orange
Grey
REMOTE SENSOR FOR
HOT WATER CYLINDER
X
MIXING VALVE 24V AC
+
REHAU CT2/ HW
Controller
24 V RELAY
L
230V AC
Mains
Supply
MIXING VALVE
0 - 10V
SENSOR BUS
SENSOR BUS
APP
SENSOR
LINK
EARTH N
Back up water temperature not allowed to
fall below the set temperature
L
Out put 1 Out put 2 Out put 3 Out put 4 Out put 5 Out put 6 Out put 7 Out put 8
N L
30ºC
N
L
N
L
N
THERMAL ACTUATORS 24V
REHAU
+ +
T T
Hot water generation
L
T
50ºC*
N
T
Description
L
T
Default Settings**
Out put 1 Out put 2 Out put 3 Out put 4 Out put 5 Out put 6 Out put 7 Out put 8
T
Programming
The programmable function allows for two timed periods per day
when the water temperature is generated up to the level set within the
controller. Outside of these periods a second temperature can be set,
as a back up, below which the stored hot water is not allowed to fall,
outside of the timed periods. The actual temperature being measured by
the sensor is displayed in the controller’s “info” menu.
T
Working Principle
The REHAU CT2/HW is provided with a remote flow temperature sensor
which is strapped on to the domestic hot water supply pipe from the
cylinder (within 150mm of top of cylinder). The temperature of the hot
water is controlled by REHAU CT2/HW, which continuously compares the
required water temperature with actual water temperature measured by
the flow temperature sensor. If the water temperature is too low, it will
signal the zone valve (wired via a 24V Relay into the Master Controller)
to open and start the boiler there by allowing hot water to flow through
the primary coil.
Channel Selector
Set to Output 5
ZONE VALVE ON DHW CIRCUIT
49. Wiring Schematic for REHAU CT2/HW Hot Water Controller and 24V Zone Valve
9.0 Domestic Hot water (DHW),
Radiators and Two stage controller
9.2
Radiators
CT2/R
SV
ZV
HLS
AV
TS
Radiator Controller
Junction Box
Safety Valve
CT2/ R
Zone Valve
High temperature Limit Thermostat
CT2/R Radiator Controller
Air Vent
Radiator
SV
Safety Valve
LSV
Temperature semsor (Flow)
CP
BPV
SV
PV
CS
RS
OC
LSV
TRV
Circulating Pump
By pass Valve
Safety Valve
Pressure Vessel
Cylinder Sensor
Room Sensor
Outside Sensor
Lockshield Valve
Thermostatic Radiator Valve
ZV
AV
TS
CP
BPV
SV
PVPV
CS
RS
TMV
LSV
TRV
FS/FC Controller
OC
RS
TRV
Zone Valve
Air Vent
Temperature Sensor (Flow)
Circulating Pump
By pass Valve
Safety Valve
Pressure Vessel
SV
Cylinder
Sensor
CP
Room Sensor
Thermostatic Mixing Valve
BPV
Boiler
Lock Shield Valve
Thermostatic Radiator Valve
CP
TS
BA Master
CT2/R
Manifold flow header
Radiator
TRV
4 Port Mxing Valve
ZV
LSV
Manifold return header
CP
HLS
Manif
ZV
Junction Box
Manifo
ZV
TMV
PV
SV
CP
50. Hydraulic Schematic for REHAU CT2/R Radiator Zone Controller
Boiler
Default Settings*
Description
21ºC*
Occupied - Zone temperature
17ºC
Setback - Zone temperature
* For altering the default settings please refer to section 8.0
Installation
A 2-port zone valve is installed on the primary supply from boiler to
the radiators and this is wired to 24V Relay, which is controlled by the
channel output of the REHAU FS/FC controller. That channel output
number is then set in the REHAU CT2/R controller.
Master Controller
RJ45
NETWORK BUS
NETWORK BUS
ADD-ON
MODULE
WIRELESS
RECEIVER
L
N
L
N
L
N
L
N
L
N
L
N
DISPLAY
N
L
N
L
N
L
N
SUPPLY
SENSOR
L
L
N
L
N
L
N
L
N
EXT.
SWITCH
I
O
A1 A2
11
MIXING VALVE
0 - 10V
SENSOR BUS
+
+
+
+
Y
+
REHAU CT2/R
Controller
24 V RELAY
REHAU
+ +
12
nc
X
MIXING VALVE 24V AC
SENSOR BUS
NOT USED
Orange
L
Brown
Blue
Green/ Yellow
14
no
EARTH N
230V AC
Mains
Supply
N
APP
SENSOR
LINK
L
If the whole heating system is served by radiators, and no underfloor
heating is used, then standard REHAU CT2 sensor should be used,
which will start the secondary pump, for circulation around the
system.
L
THERMAL ACTUATORS 24V
Out put 1 Out put 2 Out put 3 Out put 4 Out put 5 Out put 6 Out put 7 Out put 8
N
If thermostatic radiator valves are employed, these can be used for
individual room control, and the REHAU CT2/R can be used as a
timing device with the high temperature setting used for maximum
limiting and the low temperature setting for frost protection.
N
THERMAL ACTUATORS 24V
T T
L
T
N
T
L
T
Out put 1 Out put 2 Out put 3 Out put 4 Out put 5 Out put 6 Out put 7 Out put 8
The control of multiple rooms is possible, contact REHAU sales
office.
T
Programming
The default programmable function allows for two timed periods
per day when the temperature of the zone is required level and
allowed to fall to a lower level outside these periods. The actual zone
temperature being measured by the sensor is displayed in the unit’s
“info” menu.
BPV
T
Working Principle
Like traditional control of radiator circuit, REHAU CT2/R controls the
temperature of a circuit or Zone of Radiators that are hydraulically
independent from an underfloor heating system. The REHAU CT2/R
continually compares the required room temperature with the
actual room temperature, if the temperature is too low, it will signal
the zone valve (wired via a 24V Relay into the Master Controller)
controlling the radiators to open and start the boiler, thereby allowing
hot water to flow through the circuit.
TS
Channel Selector
Set to Output 5
Grey
ZONE VALVE ON RADIATOR CIRCUIT
51. Wiring Schematic for REHAU CT2/R Radiator Zone Controller
67
9.0
Domestic Hot water (DHW),
Radiators and Two stage controller
9.3
TWO Stage room temperature controller
Master Controller
0
DIP SWITCH
ON
OFF
1 2 3 4 5 6 7 8
RJ45
NETWORK BUS
N
L
3
N
4
L
N
L
N
THERMAL ACTUATORS
5
L
6
N
L
7
N
L
8
N
L
N
DISPLAY
L
MIXING VALVE
0 - 10V
THERMOSTAT BUS
SUPPLY
SENSOR
N
+
T
L
2
+
T
1
Y
X
NETWORK BUS
C1
C2
1
230VAC
L
N
L
2
N
L
N
THERMAL ACTUATORS
3
4
L
N
L
N
5
L
7
6
N
L
N
L
8
N
L
N
EXT.
SWITCH
I
O
+
+
ADD-ON
MODULE
MIXING VALVE 24V AC
THERMOSTAT BUS
APP
SENSOR
T
BOILER
B1 B2
N
T
L
+
T
SUPPLY
230VAC
WIRELESS
RECEIVER
L
N
L
N
L
N
L
N
L
N
L
N
THERMAL ACTUATORS 24V
L
THERMAL ACTUATORS 24V
Out put 1 Out put 2 Out put 3 Out put 4 Out put 5 Out put 6 Out put 7 Out put 8
L
N
L
N
L
STAGE 1
A2
11
L
L
N
L
N
L
N
EXT.
SWITCH
I
O
LINK
MIXING VALVE
0 - 10V
SENSOR BUS
+
+
SENSOR BUS
APP
SENSOR
+
+
Y
X
MIXING VALVE 24V AC
+
REHAU CT2/ 2
Controller
Channel Selector
Set to '2'
24 V RELAY
REHAU
12
nc
11
14
no
+ +
24 V RELAY
CT2/ 2
12
nc
L
NOT USED
ZONE VALVE ON
RADIATOR CIRCUIT
Orange
Grey
A2
EARTH N
L
Blue
N
N
230V AC
Mains
Supply
Brown
L
STAGE 2
A1
14
no
N
N
T T
A1
N
SUPPLY
DISPLAY SENSOR
T
N
T
L
T
N
T
L
T
Out put 1 Out put 2 Out put 3 Out put 4 Out put 5 Out put 6 Out put 7 Out put 8
ELECTRIC
HEATING
ELEMENTS
Output for second stage control is always
adjacent to stage one control output
Green/
Yellow
52. Wiring Schematic for REHAU CT2/2 Two STAGE Room temperature Controller
Working Principle
REHAU CT2/2 provides two stage control of a designated area or
room which may be part of an underfloor heating system. These
units are used where a secondary heat source is employed to boost
the temperature within the area if the conventional heating system is
not powerful enough. For example, a conservatory, which features a
considerable glass area, can benefit by the switching of an additional
heat source i.e. electric radiators on very cold days when the normal
system cannot achieve the required temperature level.
A further application is where a heat pump is used to create the normal
system hot water, but on very cold days this may not be sufficient to
achieve the required temperature. The second stage can be used to
enable a back up boiler or immersion heater.
When a timed event occurs to raise the room temperature a function
within the controller allows the normal heating system to initially try to
achieve the temperature. If after a period of time (x) it has not warmed
the space to within (y) degrees of the required level, the second output
is enabled. Once the temperature has been achieved, the second
stage switches off, but if the temperature should then fall to below (y)
degrees of that required, the second stage is re-started after a similar
delay period. Within the advanced menu section of the controller, the ‘y’
68
setting can be adjusted by the client or installer from 0ºC to 10ºC,
and the ‘x’ setting can be adjusted from 0-2 hours, so an example
would be to bring on the 2nd stage if the temperature has not
reached within 2ºC (y) of the set point after (x) 30 minutes.
Programming
4 event time and temperature programming is similar to that of
standard CT2 Programmable Room Sensor. In addition it also
includes programming for second stage. An “optimum start” facility
(adaptive function) can also be enabled when the unit will calculate
the ON time, to achieve the required temperature by the start of the
programmed period.
Installation
The Two Stage Controller is installed as part of the FS/FC
Master Controller and set to a channel number, e.g. Channel
3. The normal heating valve is connected to output 3. Output
4 on the Master Controller becomes the second stage output,
and must not be used for any other function. The electrical
capacity of the output is 2 amps, so if electric elements are
being used, a relay or contractor should be employed.
10.0 Special Functions
10.1
Networking multiple controllers
Up to 15 Strings
CP
Circulating Pump
PDB
Pressure Differential Byepass
IV
Isolating Valve
PV
Pressure Vessel
OC
Outside Sensor
CP
IV
IV
String 2
Up to 9 Masters
FS
2,1
Network Master
FS
2,2
String connecting
Network Master to
Submaster (2.1)
through Slaves
FS
2,3
Submaster
Slave
CP
IV
IV
Up to 9 Masters
FS
1,1
PV
TS
FS
1,2
FS
1,3
Add On Module
CP
PDB
String 1
4-Port
Mixing
Valve
FS/FC
0,0
Master 1
Master 2
Boiler
Add On Module
(Network Master can
control up to 14 zones)
53. Hydraulic Schematic for Networking of Multiple Controllers
In larger buildings with more than 14 zones where multiple manifolds are utilised, it is possible to use multiple masters to create a
single network. One master must be defined as the “network controlling master” by setting both dials to zero (see table below).
Using more than one secondary pump
1. If more than one secondary pump is used, a separate string should
be created for each pump (see Fig. 53). On the first string all left hand
dials in the slaves must be set to 1, and the right hand dial should
be set in sequence from 1 to 9. On the second string of masters/
slaves all left hand dials should be set to 2 and the right hand dials
again should be set in sequence from 1 to 9. This numbering can be
continued for up to 15 strings.
2. All main controllers are interconnected using special cable via the
RJ 45 socket 1 or 2.
Master and Slave
Left dial set to
Right dial set to
Network Controlling Master
0
0
String 1 Submaster
1
1
String 1 Slave
1
2 to 9
String 2 Submaster
2
1
String 2 Slave
2
2 to 9
Up to String 15 Submaster
1 to F
1
Left Dial
Right Dial
3. RJ 45 connection of string 1 to string 2 etc., can be achieved
via string 1 slave to string 2 submaster or string 1 slave to string 2
slave as shown in Fig.53.
4. An FS Master Controller can be used as the “network controlling
master” for central mixing control of supply water and boiler
switching.
69
10.0
Special Functions
10.2
Dip Switches
Function
Description
DIP switches
(located on the master controller)
1
Turn on to activate install mode
Increase temperature on sensor in room 1, this would activate actuator on
output 1 and will open after 1-3 minutes, UFH pump to turn on and mixing valve
to open; Turn off to deactivate
ON
OFF
1 2 3 4 5 6 7 8
INSTALL MODE
DIP Switch
This closes the boiler start relay contacts for 1 minute; Turn off to deactivate
ON
1 2 3 4 5 6 7 8
INSTALL MODE
OFF
Power light start blinking; each red channel light on master should now be lit if a
room sensor is present on that channel. Turn off to deactivate
ON
ON
ON
OFF
1 2 3 4 5 6 7 8
DIP SWITCHES
SWITCHES
DIP
OFF
Off
Off
INITIAL HEAT UP
SEQUENCE
X RELAY
RELAY Output
Output
X
Main Pump
Where a boiler primary pump is required to be switched on from the master,
the X relay output can be used for this purpose. This relay will be activated 10
seconds after the UFH circulating pump has started
ON
ON
OFF
OFF 1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
On
High limit zone valve
This function is used where an additional protection is required to prevent
boiler water entering the underfloor system. When the system is off or when
the supply water exceeds 65°C. An additional flow water temperature sensor
(ETF-1899A) and a zone valve are connected (Fig. 25, see page 38)
Cooling device or module
alternative
The relay output can be used to provide a volt free signal to a heat pump or
to a K-MOD switching module where a chiller is utilized to provide the cooling
water. The relay output is always on in cooling mode and off in heating mode
Turn on for Dehumidifier
If a dehumidifier is being used it can be connected via a relay using number
1 output on the master and setting DIP-7 to “on”, the output given is 24V ac.
Hence Channel 1 cannot be used for room temperature control
ON
ON
OFF
OFF
11 22 33 44 55 66 77 88
ON
ON
OFF
OFF 1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
XX- -RELAY
RELAY
On
Off
XX- -RELAY
RELAY
On
ON
OFF
1 2 3 4 5 6 7 8
DEHUMIDIFIER
7
70
RESERVED
RESERVED
XX- -RELAY
RELAY
DEHUMIDIFIER
DEHUMIDIFIER
BOILER
BOILERTEST
TEST
DIP Switch 4 turned to 'ON' on the master controller to
DIP Switch 4 turned to 'ON' on the master controller to
initial heat up sequence in accordance with BS EN 12
initial heat up sequence in accordance with BS EN 12
XX- -RELAY
RELAY
6
OFF
RESERVED
RESERVED
XX- -RELAY
RELAY
DEHUMIDIFIER
DEHUMIDIFIER
BOILER
BOILERTEST
TEST
DIP Switches on the master controller
DIP Switches on the master controller
5
DIP SWITCHES
SWITCHES
DIP
OFF
OFF
OFF 1 2 3 4 5 6 7 8
11 22 33 44 55 66 77 88
Indicated by Output LED’s flashing in rotation with word ‘commissioning’ 1 2 3 4 5 6ON7 8
flashing in the display. To restart Turn OFF and Turn ON DIP - 4. (Conforms to BS
OFF
EN 1264 - 4). To be turned on for 7 days
1 2 3 4 5 6 7 8
SENSOR
SENSORCHECK
CHECK
INITIAL
INITIALHEAT
HEATUP
UP
SEQUENCE
SEQUENCE
Turn on to activate initial heat
up sequence
INSTALL
INSTALLMODE
MODE
4
ON
ON
SENSOR
SENSORCHECK
CHECK
INITIAL
INITIALHEAT
HEATUP
UP
SEQUENCE
SEQUENCE
Turn on to activate sensor mode
SENSOR CHECK
3
INSTALL
INSTALLMODE
MODE
Turn on to close boiler relay
BOILER TEST
1& 2
10.0 Special Functions
10.3
Holiday override Functions
Dependent upon the control system
configuration it is possible to override all the
automatic functions of the control system
with a single function.
This action can be used for holiday periods
(e.g. to set the whole system into a frost
protection mode), or to temporarily override
all the temperature control of the system.
Below are set out two options.
Option 1
CT2 Programmable Room Sensor set to Channel’ 0’
Channel 0 can be used for REHAU CT2 Programmable Room
Sensor controlling a group of slave thermostats but do not control
actuators. The position of these thermostats should be somewhere
central or convenient within the building
Setting this thermostat to Channel 0 will control the time and
temperature for the connected group of thermostats but the REHAU
CT clock thermostat itself will not control an output.
Option 2
Permanent Override
If the system if fitted with REHAU CT2 Programmable Room Sensor
the scheduled 4-event program can be overridden (refer to permanent
override on page 59).
71
10.0
sPECIAl FUnCtIons
10.4
CHECkIng ContRol systEm oPERAtIon
After setting the channels, it is possible to check the entire control system.
Area circled shows the DIP switches on the Master Controller
System check procedure
1. Sensor check:
a. Switch on DIP-3 to activate sensor check - power light starts blinking.
b. Each red channel light on the Master Controller should now be lit if a Room Sensor is present on that channel.
c. Switch off DIP-3 to de-activate sensor check - power light stops blinking.
DIP Switch 3 turned to ‘ON’ on the Master
Controller to enable ‘Sensor Check’
2. Install mode:
a. Turn all adjustable temperature settings on the Room Sensors to minimum.
b. Switch on DIP-1 on the Master Controller to activate install mode (Install mode will be active for 2 hours).
c. Turn the temperature setting on the adjustable Room Sensor in room 1 to maximum. The red channel 1 light
should be lit and the actuator on output number 1 will be activated.
d. After 3 mins 10 secs UFH pump and mixing valve output will operate.
e. Repeat step 2c on all rooms.
Note 1: Install mode will only be active for 2hrs, after this it returns to normal control if left on.
Note 2: If the Room Sensor is of a wireless type, a delay of up to 5 minutes may occur before the channel light
becomes illuminated.
Note 3: If DIP-5 and DIP-6 are off this enables main pump after 10 secs.
DIP Switch 1 turned to ‘ON’ on the Master
Controller to enable ‘Install Mode’
3. Boiler test:
a. Switch on DIP-1 & 2. This closes the boiler start relay contacts for 1 minute.
DIP Switch 1 & 2 turned to ‘ON’ on the
Master Controller to enable ‘Boiler Test’
4. To end all tests:
a. Switch off DIP-1 to deactivate sensor check.
b. Switch off DIP-2 to deactivate boiler test.
c. Set all Room Sensor dials to centre position i.e. zero.
d. Room Controllers recommended to 21˚C.
e. Set all override switches to automatic position (clock symbol).
5. The system is now operating automatically.
72
11.0 TroubleShooting and Error/Fault Messages
11.1
Troubleshooting
Problem
Possible cause & Solution
Channel light is not coming on
(When in Server Check (DIP3) Mode)
Make sure the power light is blinking. If not then put DIP-3 to ON position.
2-wire bus may be incorrectly connected. Voltage at each Room Sensor should not be lower than 4.0V (check for + & - continuity and
short circuits).
For Wireless Room Sensors, please check that the batteries have been inserted correctly.
Have the Wireless Controllers/ Sensors been initialised.
For Wireless Room Sensor check that the REHAU RC (receiver) is correctly connected.
For channel 9-14, is the Add On Module correctly connected to the Master Controller.
Make sure the Room Sensor in that room is set to the correct channel number.
The channel selector on the Room Sensor may be slightly out of position, try rotating and set it again.
(When in Install mode (DIP1),
when the CT2 Programmable Room
Sensor is activated (set to maximum))
Master Controller is not in install mode - after 2 hours the Master Controller automatically de-activates install mode - please reset the DIP-1.
The actuator on the manifold has not
opened after 3 minutes.
Check the red channel light is illuminated.
Make sure the Room Sensor in that room is set to the correct channel number (two Room Sensors could be crossed over).
The actuator for the room is not connected to the correct output on the Master Controller.
Bad electrical connection between actuator and terminals.
Actuator may be faulty or manually locked.
UFH Pump not starting in install mode
Bad electrical connection between pump and terminals.
Install mode is not activated.
Pump may be faulty.
Output relay for Main pump, Cooling,
High limit valve or other attached
device, not starting in install mode
Incorrect connection to device (output relay has volt free contacts, see FS Master Controller wiring diagram for correct connection).
Bad electrical connection between terminals and attached device.
Install mode is not activated.
Attached device may be faulty.
Boiler does not fire
(LED lit)
Incorrect connection to device (output relay has volt free contacts, see FS Master Controller wiring diagram for correct connection).
Bad electrical connection between terminals and attached device.
Install mode is not activated.
Attached device may be faulty.
(LED not lit)
Timing sequence delay is activated.
FS Master Controller only - mixing valve not open above 20%.
No heat demand from Room Sensors.
Master Controller is in cooling mode.
73
11.0
TroubleShooting and Error/Fault Messages
11.1
Troubleshooting
Problem
Possible cause & Solution
Mixing valve does not operate correctly
(When in install mode)
Incorrect connection, see master wiring diagram for correct connection.
Valve/actuator assembly is incorrect.
Actuator is faulty.
Check what happens if sensor and/or outdoor module is missing.
(Valve cycles between open and closed
in normal operating mode)
Valve may be oversized.
Supply Limit sensor may be subject to heat migration.
Upstream water temperature is excessively high (these problems may be corrected by changing PI settings – please refer to the
REHAU Intelligent FS/FC Heating/Cooling Controls, Technical and Installation Manual).
Room is too cold.
(After running for at least 48 hours)
The Room Sensor is placed in a position that does not represent the general temperature in the room. E.g. mounted on external wall
or near an extraneous heat source.
If the room is controlled by a CT2 Programmable Room Sensor, check that the time and temperatures are set correctly.
If the Room Sensor has got an override switch (TM or TD), the switch may be set in the “off” or “night” position.
For rooms with floor sensors, the maximum floor limit setting could be preventing the room reaching the desired temperature.
Insufficient heating capacity of the system.
Bad insulation creating large heat loss.
Room is too hot
(After running for at least 48 hours)
This could be caused by draughts within the wall cavities.
The Room Sensor is placed in a position that does not represent the general temperature in the room.
If the room is controlled by a CT2 Programmable Room Sensor, check that the time and temperatures are set correctly.
If the Room Sensor has got an override switch (TM or TD), the switch may be set in the “day” position.
For rooms with floor sensors, the minimum floor limit setting could be increasing the room temperature above the desired setting.
Solar gain or extraneous heat source.
74
11.0 TroubleShooting and Error/Fault Messages
11.2
ERROR/Fault messages
During normal operation the green power LED will be ON when the Master Controller is energised. The red output Channel LED’s (1 to 8 on
the Master Controller, and 9 to 14 on the add-on module) will indicate if the channel output relay is ON/OFF.
An error / fault message is shown by flashing the green power LED or one of the 8 red output Channel LED’s. From the number of flashes
on any one LED, the problem can be diagnosed, and identified from the following:
The error number will be indicated by the number of flashes, with a pause of less than a 1/2 second between the flashes. The indication will
be followed by a pause of 2 seconds, following which the sequence will be repeated. The failure code can also be seen in the service menu
on WLM-FS MASTERS (submenu 2).
11.2.1 Flashing Power LED (green)
Flashes
Description
Corrective action
1 Flash
One or more Room Sensors, room controllers, WLH, WLAC that are set to
channel 0 or channel 15 are no longer sending data to the Master Controller.
The fault is corrected by replacing the Room Sensor. The Master Controller
will need to be HARD RESET (see below).
If the Room Sensor is of the WIRELESS type, the error/fault message
could be an indication that the power has failed, and that the internal
battery of the Room Sensor needs to be replaced.
2 Flashes
One or more Room Sensors have been set to a channel number which does
not exist in the system. For example, the message will occur if the units are
set to channels 9-14 and the required Add On Module are not found in the
system.
The error is corrected by setting the channel number of the Room Sensor to a
channel that does exist within the installed Master Controller/Add On Module
system.
3 Flashes
Application sensor defect.
The fault is corrected by changing the temperature sensor. If the sensor has
been removed deliberately to change the operation of the system, follow the
HARD RESET instruction below.
4 Flashes
The Outdoor Compensation Module (OC) is defective.
The fault is corrected by changing the Outdoor Compensation Module. If the
module has been removed deliberately to change the operation of the system,
follow the HARD RESET instruction below.
5 Flashes
The external Supply limit sensor (type ETF-1899A) is defective.
The fault is corrected by changing the temperature sensor. If the sensor has
been removed deliberately to change the operation of the system, follow the
HARD RESET instruction below.
6 Flashes
Internal overheating.
The Master Controller has its own internal safety temperature protection
system. The problem is corrected by improving the ventilation around the
Master Controller module.
7 Flashes
Defective internal overheat sensor. The Master Controller will control as normal,
however the protection against internal over heating is no longer active.
The fault can only be corrected by replacing the Master Controller module.
8 Flashes
The communication to the Add On Module has been lost.
The fault is corrected by re-establishing the connection to the Add On
Module or by changing the Add On Module if it is defective - or if it has been
deliberately removed, with a HARD RESET.
9 Flashes
Indicates total number of input units exceeded.
Please refer to factory or your local service engineer.
10 Flashes
No connection to wireless receiver REHAU RC.
11 Flashes
Step 2 on 2-step controller REHAU CT2/2 is used by another Room Sensor/
Controller.
Only one error/fault condition can be shown at a time. If more than one error occurs, they will be prioritised in the sequence of flashes.
75
11.0
TroubleShooting and Error/Fault Messages
11.2
ERROR/Fault messages
11.2.2 Flashing Output LED (red):
The appropriate output channel LED can flash, indicating that the Room Sensor or Controller on that channel has a fault/error. The failure code can
also be seen in the service menu (submenu 2a).
Flashes
Description
Corrective action
1 Flash
The Master Controller has lost communication to the Room Sensor.
The fault is corrected by re-establishing the connection to the Room Sensor
and the fault condition will be automatically reset once correct communication
is resumed. If the Room Sensor is defective and has to be changed, or if it has
been deliberately removed, it is necessary to make a HARD RESET.
If the Room Sensor is of the WIRELESS type, the error/fault message
could be an indication that the power has failed, and that the internal
battery of the Room Sensor needs to be replaced.
2 Flashes
The internal sensor in the Room Sensor/Controller is defective.
The fault can only be corrected by replacing the Room Sensor/Controller.
Remember to make a HARD RESET after installing the new Room Sensor/
Controller.
3 Flashes
The limit sensor on the Room Sensor/Controller is defective.
Replace the faulty sensor. Reset is NOT required.
4 Flashes
Defective REHAU CT2 Programmable Room Sensors/Controllers.
If a CT2 Programmable Room Sensor operating a group of Room Sensors
becomes defective, the remaining Room Sensors will continue control within the
maximum and minimum limits programmed into the Master Controller.
5 Flashes
Two or more CT2 Programmable Room Sensors/Controllers are trying to control
this output.
Check “AREA” setting on the CT2 Programmable Room Sensor.
11.2.3 Voltage Measurements
The following information should be useful to electrical installers who, with a multi meter, can measure voltages on the terminals of the Master
Controller Modules and Room Sensors. Please check these measurements first, in the event of an apparent malfunction.
Voltage measured across
Value
Description
Sensor Bus (measured at any point within the Bus)
4.69v to 4.99v dc
Indicates a good bus
Less than 4.69v dc
Indicates that one sensor may have polarity reversed
Above 4.99v
Theoretically impossible
External switch (measured across the terminals)
11.5 to 12v dc
Supply water sensor (measured across two terminals)
5.0v dc
Mixing valve actuator
25v to 27v ac between + and -
Drive signal (the master shows the output in the “spanner”
section of the display menu, this can be checked at the
actuator terminals, across the blue and black cables).
0v to 10v dc
76
Good Functionality
12.0 REsEts
FS
20.1˚C
WLM. Hydronic Master
1
2
3
4
5
6
7
8
There are two different reset actions that can be used on the FS Master Controller:
Resets
To Enable
Function
Hard Reset*
(used if there is a
faulty sensor)
Press the “ ” button on the FS Master Controller for 5 seconds; a HARD
RESET will be initiated (indicated by all the red output LED’s (1-8) rapid
lighting in sequence).
a) This reset will remove any Room Sensor unit with a defective input
sensor, or a defective Add On Module from the system.
b) The fault message will be reset, but the defective items will no longer
participate in the system. Once a defective unit is replaced, the new unit will
automatically be recognised by the FS Master Controller and become part of
the system.
c) This reset would erase the identity of the defective component from the
Master Controller memory.
Factory Reset
(restores factory
defaults)
Press the “ ” button on the FS Master Controller for 15 seconds; a total
factory reset will be initiated. This is indicated through flashes of channel
LED’s 1,3, 5 and 7 alternating with channel LED’s 2, 4, 6 and 8
(while the “ ” button is pressed).
a) This reset will put all programmed temperature settings back to the
factory defaults.
b) It will also remove all Room Sensors/Controllers from the master
memory, and reset the system to accept only those Room Sensors/
Controllers that are functioning correctly.
* Hard resets do not alter the temperature settings already programmed into the FS Master Controller.
12.1 Replacing Faulty Sensor/Controller
1. Identify the sensor/controller to be changed by the blinking
output LED.
2. Switch OFF power to the master
6. On wireless sensor/controller now press the button on the sensor/
controller. On hardwired sensor/controller go to step
3. Change the sensor/controller. Ensuring the correct channel address
7. Check that the corresponding output LED has changed from
blinking to permanently ON.
4. Switch ON power to the master
8. Reset the DIP-3 to OFF.
5. Set the master into sensor check mode and set DIP-3 to ON.
For any other changes in the system use the quick guide and start the
install sequence from the beginning.
77
13.0
Sensor failure/valve and pump exercise
13.1 Sensor/Controller Failure
If a Room Sensor/Controller is defective or if the communication to the
unit is interrupted, an alarm will be triggered. Depending on the system
configuration the control will continue in one of the following ways.
- If there are several units on the same channel which have a room
sensor (which is still intact), the control will continue as before,
however without contribution from the defective unit
- If no valid Room Sensor/Controller is found, the system will run at
constantly 20% ON
- If an outdoor sensor is connected, the system will run 40% at 10°C
(and below) decreasing to 0% at 20°C (and above).
The emergency program is only valid for channels with heat control.
Channels with cooling control will always run at 100% OFF in
connection with a defective room sensor.
78
13.2 Emergency Program for Supply Limit Sensor
- If the supply limit sensor is defective, the system will run at
constantly 20% on for the mixing valve.
- If an outdoor sensor is connected, the system will run 40% at
10°C (and below) decreasing to 0% at 20°C (and above).
13.3 Valve and Pump Exercise
If no automatic ON/OFF sequence of valves, or pumps occurs over
a 72 hour period, an exercise of these components will take place.
The actuators will be activated for 3 minutes. The pumps will be
started for 10 seconds during that period and the mixing valve
actuator if fitted will be opened and closed. During this period
there will be no firing of the boiler.
14.0 Wiring Schematic - Next Generation
REHAU FS Master controller with ADD On module
REHAU OC OUTSIDE SENSOR
CT2 PROGRAMMABLE ROOM SENSOR
WEATHER COMPENSATION ONLY
COMFORT PLUS SENSOR LIMITFLOOR
SENSOR
STANDARD SENSOR
UP TO 14 CHANNELS
+
+
REHAU
TA
CHANNEL 1
CHANNEL 2
+ +
+ +
TD
-
CHANNEL 14
-
+ +
T T
REHAU
CT
+ +
T T
REHAU
T T
T T
A
4 Core cable minimum 0.25 mm²
UNIT
NUMBER (1-9)
5 4 3 2
4
9 8 7 6
1
L
8
N
L
N
DISPLAY
SUPPLY
SENSOR
L
N
ADD ON MODULE
THERMOSTAT BUS
+
+
5
DIP - 6
OFF
OFF
ON
RJ45
RESERVED
DEHUMIDIFIER
BOILER TEST
LEARN MODE
INSTALL MODE
7
N
T
L
NETWORK BUS
MIXING VALVE
0 - 10V
Y
T
6
N
COMMISSIONING
MODE
X - RELAY
1 2 3 4 5 6 7 8
OFF
ON
ON
1
L
X
2
N
L
G
NETWORK BUS
3
4
N
L
N
L
N
THERMAL ACTUATORS
5
L
6
N
L
SENSOR BUS
N
+
T
5
L
DIP - 5
COOLING DEVICE/MODULE
+
T
B
LINK
3
4
N
L
N
L
N
THERMAL ACTUATORS
2
L
9
2
N
F
7 6
X-RELAY OUTPUT FUNCTION
BOILER PUMP
HIGH LIMIT ZONE VALVE
C
1
8
DIP SWITCH
ON
OFF
L
0
1 0 F E
D C B A
FS Controller (Main Control)
3
STRING
NUMBER (1-F)
RJ 45
E
L
N
L
THERMAL ACTUATORS
3
4
N
L
N
L
N
5
L
6
N
L
7
N
L
8
N
L
N
EXT.
SWITCH
I
O
+
+
SUPPLY
230VAC
L
D
BOILER
0
0
X-RELAY
0
0
SEC. PUMP
230VAC
N
L
1
L
N
2
N
L
THERMAL ACTUATORS
3
4
N
L
N
L
N
MASTER
MODULE
SENSOR BUS
5
L
6
N
L
+
+
N
WIRELESS
RECEIVER
WIRELESS
RECEIVER
5
6
7
8
ACTUATOR
ACTUATOR
ACTUATOR
ACTUATOR
ACTUATOR 1 & 2
ACTUATOR 3 & 4
LINK
+
ADD-ON
MODULE
MIXING VALVE 24V AC
THERMOSTAT BUS
APP
SENSOR
ACTUATOR 9
ACTUATOR 10
ACTUATOR 11
ACTUATOR 12
N
2
T
L
1
T
SEC. PUMP
230VAC
T
N
X-RELAY
C1 C2
T
L
BOILER
B1 B2
T
SUPPLY
230VAC
Limit sensor placed on water supply pipe to manifold from mixing valve
2 Core cable minimum 0.25 mm²
L
N E
Circulating
Pump
4 port mixing valve
complete with
actuator
4-Port mixing valve with actuator
T he schematic shown explains the typical/
basic wiring principle of the REHAU
Intelligent controls. The number of Room
Sensors / Add On Modules can differ for
each project.
RJ 45
L
N
2
N
L
THERMAL ACTUATORS
3
4
L
N
L
N
N
DISPLAY
N
5
6
L
N
L
7
N
L
L
N
Y
X
NOTES
+
+
1. Earth wiring not shown for drawing clarity.
MIXING VALVE 24V AC
SENSOR BUS
APP
SENSOR
+
ADD-ON MODULE
3. Secondary pump connection must be routed back
to the secondary pump terminals within the
FS Master Controller if only 1 manifold secondary
pump is connected to the system. This is required
to allow the pump to run should any actuator
connected to the Add On Module be called to open.
E
4
8
7
SUPPLY
230VAC
6
L
DIP SWITCH
N
BOILER
0
0
X-RELAY
0
0
SEC. PUMP
230VAC
L
N
RESERVED
DEHUMIDIFIER
INITIAL HEATUP
SEQUENCE
X - RELAY
BOILER TEST
SENSOR CHECK
INSTALL MODE
1 2 3 4 5 6 7 8
BOILER PUMP
HIGH LIMIT ZONE VALVE
COOLING DEVICE/MODULE
DIP - 5
OFF
ON
ON
4. 4 core cable with a minimum cross sectional area
of 0.25mm² must be used to connect the Add On
Modules to the FS Master Controllers.
5. 2 core cable with a minimum cross sectional area of
0.25mm² must be used for the thermostatic bus.
X-RELAY OUTPUT FUNCTION
ON
OFF
WIRELESS
RECEIVER
5
9 8 7 6
5 4 3 2
D C B A
2. All wiring and earthing to be in accordance with
BS 7671:2002, I.E.E Regulations.
UNIT
NUMBER (1-9)
1
STRING
NUMBER (1-F)
TURN ON DIP 4 TO ACTIVATE COMMISSIONING
MODE (TO BE TURNED ON FOR 7 DAYS) Indicated by
Output LED's flashing in rotation with word
'commissioning' flashing in the display. To restart Turn
OFF and Turn ON DIP - 4. (Conforms to BS EN 1264-4)
TURN ON DIP 7 FOR DEHUMIDIFIER (COOLING ONLY)
If a dehumidifier is being used it can be connected via a
relay using number 1 output on the master and setting
DIP-7 to "on", the output given is 24Vac. Hence Channel
1 cannot be used for room temperature control
+
D
9
DIP ON
7 OFF
SENSOR BUS
+
Mixing Valve
2
DIP ON
4 OFF
N
NETWORK BUS
EXTERNAL
SWITCH
O
I
8
N
0
F
L
L
1 0 F E
DIP ON
3 OFF
TURN ON DIP - 3 TO ACTIVATE SENSOR CHECK
Power light blinks quickly, each red channel light
on master should now be lit if a room sensor is
present on that channel. Switch off to deactivate
N
ACTUATORS
C
TURN ON DIP 1 & 2 TO ACTIVATE BOILER TEST
This closes the boiler start relay for 1 min
L
LINK Sensor BUS
DIP SWITCH
DIP ON
2 OFF
N
NETWORK BUS
MIXING VALVE
0 - 10V
3
B
1 OFF
L
Secondary Pump signal
230 V Switch Secondary
from Add On module
Live to Boiler Pump
Mains
TURN ON DIP 1 TO ACTIVATE INSTALL MODE
Increase temperature on sensor in room 1, this
would activate actuator on output 1 and will
open after 1-3 mins, UFH pump to turn on and
mixing valve to open followed by UFH pump and
mixing valve
N
SUPPLY
SENSOR
8
Limit
Sensor
1
DIP ON
L
7
SEC. PUMP
230VAC
L
A
N
L
N
L
N
THERMAL ACTUATORS
6
T
N
X-RELAY
C1 C2
5
T
L
BOILER
B1 B2
L
4
T
T T
SUPPLY
230VAC
N
3
T
+ +
L
LINK
CHANNEL 1
2
T
1
DIP - 6
OFF
OFF
ON
Mains
G
UFH Pump signal
to main controller
6. All sensor connected to the bus must terminate at the
FS Master Controllers not at the Add On Modules.
The above wiring schematic is for guidance only and
should not be used as definitive wiring diagram.
79
Our verbal and written application engineering advice is based upon experience and the best of our knowledge. However it is to be regarded as non-binding information.
Working conditions and use under conditions for which the product was not intended and over which we have no influence exclude any claim resulting from our information.
We recommend that a suitable check is made as to whether the REHAU product is suitable for the envisaged purpose. Application, use and processing of the products is
carried out beyond the scope of our control and are therefore carried out exclusively at your own responsibility. If liability should still apply, then this is restricted, in the case
of all damage, the value of the goods supplied by us and used by you.
Our warranty applies to the consistent quality of our products as per our specification and in accordance with our general terms and conditions of delivery and payment.
This document is protected by copyright. All rights based on this are reserved. No part of this publication may be translated, reproduced or transmitted in any form or by any
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Slough
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Birmingham
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Glasgow
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Dublin
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Santry
Dublin 9
Tel: (0207) 580 6155
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864.602EN/E&T/06.08