2
B 335 -RTP 82 Eng 03.93
We reserve the right to make changes without notice
COSTER
fig. 3
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147
12
3
2
4
4
5
6
6
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64,5
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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
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90
52
25
34
67
1
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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
