27
3.3 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.
Maximum Manifold Size = 12-Port.
Wired Sensors/Controllers
Components
REHAU Art. No.
Constant Flow Temperature
REHAU CT2 (Programmable Room Sensor)
225108-002
Minimum:1x (same time setting in all zones)
Maximum:14x (different time setting in all zones)
REHAU TP (Tamper resistant sensor)
225109-001
Up to 8 zones: maximum of 7x
Up to 14 zones: maximum of 13x
REHAU TA (Standard Sensor)
225106-001
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 with 2 small cables with RJ 45 connectors
Wireless Sensors/Controllers
Components
REHAU Art. No.
Constant Flow Temperature
REHAU RF CT2 Programmable Room Sensor
202246-001
Minimum:1x (same time setting in all zones)
Maximum:14x (different time setting in all zones)
REHAU RF TP
202253-001
Up to 8 zones: maximum of 7x
Up to 14 zones: maximum of 13x
REHAU RF TA
202251-001
REHAU RF TD
202245-001
REHAU RF TM
202254-001
REHAU RC
202244-001
Minimum: 1x
Maximum: 5x
NOTE:-
Communication distance: Up to 30m inside building and 100m line of sight
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.
Considering the graph above 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.
Inter
nal
Temper
atur
e °C
04
8°C
05
06
07
08
09
10
12°C
18°C
20°C
Optimised start
Clock set for 6am
Time during the day
Potential energy savings
18a. Graph showing an example of optimised start