Coster B 335 User manual

1
B 335 -RTP 82 Eng 03.93
We reserve the right to make changes without notice
COSTER
APPLICATION
RTP 82 is designed for the control of mixing or diverting valves
operatedbyreversibleactuators(3-wireelectriccontrol),forthe
regulationofroomtemperatureandofthemaximumflowtempe-
rature limit (45 °C) in underfloor heating systems:
•Single-family dwellings
•Flats with autonomous heating
•Residential complexes with zone heating.
•Single spaces in industrial or craft premises
ESSENTIAL ACCESSORIES
No. Description Model Sensingelement Symbol Data sheet
For all models :
1 Immersion flow temperature detector SIH 010 NTC 10 kΩB1 N 140
For /D models :
1 or 4 Room temperature detectors (4 for large spaces) SDA 010 NTC 10 kΩB2 N 110
or 2 Room temperature detectors (for large spaces) SDA 020 NTC 20 kΩB2 N 110
MODELS
Model Description
RTP 825 With 24-hour quartz time switch and room detector incorporated
RTP 826 With 7-day quartz time switch and room detector incorporated
RTP 825/D With 24-hour quartz time switch and remote room detector
RTP 826/D With 7-day quartz time switch and remote room detector
B 335
03.93
MODULATING ELECTRONIC ROOM CONTROLLERS
FOR UNDERFLOOR PANELS
RTP 82 Eng.
•Power supply 220/240 Volt ac; IP 20 protection
•One modulating output with PI control action and voltage-free SPDT contacts
•24-hour or 7-day time switch
•Maximum flow temperature limit (45 °C)
fig. 1
OPERATING DIAGRAMS
Controller with room detector incorporated Controller with remote room detector
12
3
6
9
20
15
COSTER
RTP 82
T
N1
Y
M
B1 E2
E1
12
3
6
9
20
15
COSTER
RTP 82
T
N2
Y
M
B1 E2
E1
B2
E1
E2– Boiler
– Underfloor panels
B1
B2– Flow detector
– Room detector N1
N2– RTP 82 .. controller
– RTP 82 .. /D controller M
Y– Plant pump
– Mixing valve

2
B 335 -RTP 82 Eng 03.93
We reserve the right to make changes without notice
COSTER
fig. 3
▼
▼
147
12
3
2
4
4
5
6
6
▼
▼
64,5
▼
▼
82,5
12345678
5
BASE
1 – Terminal block
2 – Housings for spring clips
3 – Cable entry for wires from rear
4 – Screw holes for wall mounting
5 – Setting range limiting pins
6 – Guide pins for electronic circuit
INSTALLATION
RTP82.. withtheroomdetector incorporated mustbeinstalled
at a height of 1.5 to 1.6 meters from the floor, on an internal wall
ofthemostrepresentativeroom,atapointwhichrepresents the
average temperature. It must be as far as possible from win-
dows, doors and sources of heat, and corners, shelving and
curtains must be avoided.
RTP 82 . ./D with remote detector can be installed anywhere
since it is supplied without an internal sensing element. The
room detector must be installed following the same criteria as
forRTP82... Inparticularlylargespacesitisadvisabletouse2
SDA020detectorsconnectedinparallelor4SDA010detectors
connectedinseries-parallelandpositioned soastomonitorthe
average temperature of the room.
•Removethebase fromthecase bypressingwiththe handson
its two longer sides.
•Fix the base (fig. 3) to the wall using the screw holes provided
(fig.3.4)andtakingcare to pass theelectricwiresthroughthe
appropriate cable entry (fig. 3.3).
•Maketheconnectionsinaccordancewiththewiringdiagrams
(fig. 6) and observing the safety regulations in force.
fig. 4
TIME SWITCH
1 – 12-hour dial
2 – Index
3 – Manual switch
4 – Contact position indicator
0 1
12
93
6
6
5
4
3
2
1
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
123
4
5
7
6
0 1
12
93
6
3
2
1
7
6
5
4
2
4
6
1
35
8
24-hour 7-day
5 – "Normal" period segments
6 – "Setback" period segments
7 – 24-hour dial
8 – 7-day dial
OPERATION
Theroomtemperatureis monitoredbyanNTC sensing element
situated inside RTP 82, or, in the /D models, by a remote room
detector B2.
RTP82comparesthe actualvalueoftheroom temperaturewith
thedesired“Normal”and“Setback”temperaturessetbymeans
of the two potentiometers on the facia of the case (fig. 2.6) and
(fig.2.7). Intheeventofadifference,RTP82produces a modu-
lating signal with PI control action, for the control of the valve Y,
proportionaltothe differenceitselfand totheproportional band
(±1 °C).
The immersion detector B1 monitors the flow temperature, and
RTP 82 uses this data as a compensating element to ensure a
perfect stabilisation of the room temperature and as maximum
flow temperature limit (45 °C) to prevent the underfloor panels
from being subjected to excessively high temperatures.
The time switch provides for switching between the “Normal”
and “Setback” modes.
CONSTRUCTION
RTP 82 is constructed in two parts:
•Base (fig. 2.2) in plastic material, suitable for wall mounting,
comprising:
– terminal block for electrical connections, protected against
accidental contacts (fig. 3.1);
– cable entry for wires from rear (fig. 3.3);
– standard screw holes for fixing to a panel-mounted box if
required (fig. 3.4).
•Case(fig.2.1)inplasticmaterialwhichenclosestheelectronic
circuit ; on the facia are the two knobs for setting the desired
temperatures (fig. 2.6and 2.7), the time switch (fig. 2.4), the
LEDs indicating the opening and closure of the valve (fig. 2.10
and2.11)andtheperiodof“Normal”or“Setback”operation(fig.
2.8and 2.9).
The case is secured to the base by means of four spring clips
andtheelectricalcontactsaremadebymeansofpinswhichare
pressed directly into the terminal sockets.
Thecircuitis poweredby220/240Volt acthroughatransformer
so the circuit has no direct contact with the mains supply. The
SPDT contact of the output relay is voltage-free so that it is
possible to control actuators using voltages other than 220/240
Volt.
fig. 2
OVERALL DIMENSIONS
1 – Case
2 – Base
3 – Operations switch:
- Automatic
- Continuous "Normal"
- Continuous "Setback"
4 – Time switch
12
3
6
9
20
15
COSTER RTP 82
▼
▼
▼
▼
90
52
25
34
67
1
▼
▼
185
8
9
10 11
5
6
7
8
9
10
11
– Time switch window
– Desired "Normal" temp.
– Desired "Setback" temp.
– "Normal" LED
– "Setback" LED
– Valve opening LED
– Valve closing LED

3
B 335 -RTP 82 Eng 03.93
We reserve the right to make changes without notice
COSTER
SETTING
Time Switch
To see the time switch completely the protective window must
be opened by turning it to the left.
•Adjustment of current time
The dial can rotate both clockwise and anticlockwise.
–24-hourtime switch :rotatetheminutes hand,bymeansof the
glasswindow(fig.4.1)untilthecurrenthouronthe24-hourdial
(fig. 4.7) coincides with the index at top left (fig. 4.2) and the
current hour on the 12-hour dial (fig. 4.1) coincides with the
hour and minute hands.
– 7-day time switch : rotate the minutes hand, by means of the
glass window (fig. 4.1), until the current day sector on the 7-
daydial(fig.4.8)coincideswiththeindex(fig.4.2);continueto
rotatethe minuteshanduntilthecurrenthouronthe7-daydial
coincides with the index (fig. 4.2) and the current hour on the
12-hour dial (fig. 4.1) coincides with the hours and minutes
hands.
•Setting programme
By means of the prod, housed under the protective window,
movetowardstheoutsideallthesegmentscorrespondingtothe
“Normal” periods of operation (fig. 4.5) which will be evidenced
by the appearance of red zones. The 24-hour time switch has
10-minute segments with a minimum interval of 20 minutes be-
tween two successive switchings.
The 7-day time switch has 1-hour segments with a minimum
interval of 2 hours.
Control of desired temperature
Two values for desired temperature can be set:
•“Normal” temperature, for periods when the premises are oc-
cupied, with the “Sun” potentiometer (fig. 2.6).
•“Setback” temperature, for periods of non-occupation of the
premises or for the night period, with the “Moon” potentio-
meter (fig. 2.7).
The setting range of the desired temperatures can be limited
by means of two pins (fig. 3.5) housed on the base at the side
of the terminal block. Extract the setting knobs (fig. 2.6) and
(fig.2.7),and,usingtheprod,insertthepinsintheholescorre-
spondingtotheminimumandmaximumlimit temperatureval-
ues.
TESTING
•Setthetimes for the plant to be in operation on the time switch
and position the operations switch (fig. 2.3) on “Time switch”.
•Turnthe“Normal”temperaturepotentiometer(fig.2.6)tomaxi-
mumandthe“Setback”temperaturepotentiometer(fig.2.7)to
minimum.
•Position the time switch dial to the “Normal” period position.
LED (fig. 2.8) should light.
The result should be : valve opening and LED (fig. 2.10) lit.
•Position the time switch dial to the “Setback” period position.
LED (fig. 2.9) should light.
The result should be : valve closing and LED (fig. 2.11) lit.
•Position the switch (fig. 2.3) on “Sun”. LED (fig. 2.8) should
light.Withpotentiometer(fig.2.6)atmaximumtheresultshould
be : valve opening and LED (fig. 2.10) lit.
With potentiometer at minimum : valve closing and LED (fig.
2.11) lit.
•Position switch (fig. 2.3) on “Moon”. LED (fig. 3.9) should light.
Withpotentiometer(fig. 2.7)atmaximumthe resultshouldbe:
valve opening and LED (fig. 2.10) lit.
With potentiometer at minimum : valve closing and LED (fig.
3.11) lit.

4
B 335 -RTP 82 Eng 03.93
We reserve the right to make changes without notice
COSTER
D 33056 r.g.
TECHNICAL DATA
Power supply 220/240 Volt ac
Frequency 50/60 Hz
Power absorbed 4 VA
Voltage-free output contact:
– type SPDT modulating
– voltage rating 250 Volt
– capacity rating 5(3) Amp
Temperature setting range 5 to 30 °C
Fixed proportional band ±1°C
Time switch power reserve 72 h
Minimum switching interval :
– RTP 825 24-hour 20 min.
– RTP 826 7-day 2 h
Room temperature:
– operation 0 to 45 °C
– storage – 20 to +60 °C
Room humidity G (DIN 40040)
Protection IP 20
Dimensions 185 x 90 x 52 mm.
Weight 0.45 Kg
fig. 6
WIRING DIAGRAMS
General layout Control actuator
with voltage other
than 220/240 Volt
Connection RTP 82. ./D detectors
B1
67 8
t°t°
B2
t°t°
B2a
B1
67 8
t°
B1
67 8
t°t°t°
t°t°
B2b
12
L0
220/240
Volt
ac
T
345
Y
Co
1Cl
3
Op
2
▼
▼
RTP 82
12 345
B1
L0
220/240
Volt
ac
67
t°
Y
Co
1Cl
3
Op
2
▼
▼
– Room detector SDA 020
– Room detector SDA 010
B2a
B2b Y T– Valve – Transformer
– Flow detector SIH 010
– Room detector SDA 010
B1
B2
L
0– Live – Neutral
COSTER
CONTROLLI
TEMPERATURA
ENERGIA
COSTER
UNI EN ISO 9002
CISQ/CSQ cert.n°9115.COEE
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