Coster RTE 982 User manual

1
B 217 - RTE 98. Eng.
25.09.07 LB
REV. 01
We reserve the right to make changes without notice
COSTER
B 217
25.09.07 LB
REV. 01
WEATHER COMPENSATOR
FOR CONTROL OF VALVE OR BURNER
RTE 98.
Eng.
• Analogue controller for boiler plant:
– 1 modulating or On-Off output for control valve or burner
– 1 On-Off output for control pump or burner in relation to programmed times
– voltage-free output contacts
– adjustment of heating curve to compensate for weather variations in intermediate seasons
– possibility of adjusting value of desired ambient temperature by remote control
• Power supply 230 V~; installation on 144 x 144 control panel back plate
1. APPLICATION
RTE 98. controller is designed for winter compensated control in medium and large central heating plants for
premises such as:
– administrative and commercial centres
– schools and public buildings
– apartment blocks
It is suitable for all climatic zones and for any type of heating media:
– panels
– radiators
– fan coils
RTE 98. controls mixing or diverting valves operated by reversible electric actuators with three-wire control and
opening times of from 90 to 630 seconds, or the boiler burner.
2. FUNCTIONS
The main functions of RTE 98. are:
• Winter regulation of the flow temperature in relation to the outside temperature with:
– PI control action
– adjustment of heating curve to compensate for weather variations in intermediate seasons
• Modulating three-wire control or On-Off
• Control plant pump from timed programme in use
• Timed programming: 24-hour (RTE 982) or 7-day (RTE 983)
• Remote control for adjusting temperature programmed on controller
• Timed control : RTE 98 is able to control an On-Off output which operates with the program times used. It can be
used for the control of the plant circulation pump : in the Normal "Sun" periods contacts 8-10 are closed, while in
the Setback "Moon" periods contacts 8-10 are open.
4. DETECTORS & ACCESSORIES
No. Description Type Sensing element Code Data sheet
No. Description Type Sensing element Code Data sheet
ESSENTIAL ACCESSORIES:
ESSENTIAL ACCESSORIES:
1 Surface plant flow temperature detector
1 Surface plant flow temperature detector
SCH 010
NTC 10 k
Ω
B1 N 130
or immersion
or immersion
SIH 010
NTC 10 k
Ω
B1 N 140
1 Outside temperature detector
1 Outside temperature detector
SAE 001
NTC 1 k
Ω
B2 N 120
OPTIONAL ACCESSORIES:
OPTIONAL ACCESSORIES:
1 Remote control
1 Remote control
CDB 340
– R N 711
No. Description Type Sensing element Code Data sheet
ESSENTIAL ACCESSORIES:
1 Surface plant flow temperature detector
or immersion
1 Outside temperature detector
OPTIONAL ACCESSORIES:
1 Remote control
No. Description Type Sensing element Code Data sheet
No. Description Type Sensing element Code Data sheet
NTC 10 k
NTC 10 k
NTC 1 k
– R N 711
No. Description Type Sensing element Code Data sheet
B1 N 130
B1 N 140
B2 N 120
– R N 711
No. Description Type Sensing element Code Data sheet
B1 N 130
B1 N 140
B2 N 120
– R N 711
3. VERSIONS
Code Description
RTE 982
Compensating controller with 24-hour time switch
RTE 983
Compensating controller with 7-day time switch
Code Description
Code Description
Compensating controller with 7-day time switch
Time switch:
– power reserve 100 h
– dial 4-hour or 7-day
– minimum daily interval 15 min.
– minimum weekly interval 24 h
Suitable actuators 90...630 s
Room temperature:
– operating 0...+45 °C
– storage – 25...+60 °C
Room humidity Class F (DIN 40040)
Protection IP 40
Weight 1.2 Kg
5. TECHNICAL DATA
Power supply 230 V~± 10%
Frequency 50...60 Hz
Consumption 4 VA
Electromagnetic compatibility CEE 93/68
Output contacts:
– maximum switched voltage 250 V~
– maximum switched current 5 (1) A
Setting ranges:
– Normal and Setback ambient temperature 0...30 °C
– K factor 0.5...3.5
– adjustment C curve ± 5 °C

2
B 217 - RTE 98. Eng.
25.09.07 LB
REV. 01
We reserve the right to make changes without notice
COSTER
6. OVERALL DIMENSIONS
Front panel
Container
Cutout for recessed
mounting
7. FRONT PANEL
1 – Programming switch 5 – Opens-Closes LEDs
2 – Curve adjustment 6 – Pump LED
3 – Plant factor K 7 – Setback temperature
4 – Power supply LED 8 – Normal temperature
1
2
4
7
3
5
6
8
8. ACTUATORS SPEED PROGRAMMER
9. WIRING DIAGRAMS
B1 – Flow detector E – Burner Y – Valve
B2 – Outside detector M – Plant pump T – Transformer
R – Remote control
General layout Control of actuator
Control
with voltage other than 230 V
~
burner
2 3
Y
Co Op
Cl
L N
230 V~
5 6 7
T
2 3
L N
230 V~ 6 - 7
In series with
boiler thermoistats
E
5 6 7
F
RTE 98
1 2 3 5 6 7 13 19 20
L N
230 V~
8 9 10
Y
M
Co Op
Cl
14 1811
t˚
B2
12
B1
t˚
R

3
B 217 - RTE 98. Eng.
25.09.07 LB
REV. 01
We reserve the right to make changes without notice
COSTER
10. INSTALLATION
10.
1
Controller
The controller must be installed in a dry location which meets the ambiental limits given under 5. TECHNICAL DATA.
If installed in spaces classified as “Dangerous” it must be installed in a cabinet for electrical appliances constructed
according to the regulations in force for the type of danger concerned.
The controller can be wall-mounted or fitted into a composite control panel door.
10.
2
Plant fl ow temperature detector B1
With plant pump on flow it must be installed downstream of this; with pump on return
it must be installed at least 1.5 metres downstream of the control valve.
10.
3
Outside temperature detector B2
This must be installed outside the building on the north or north-west side, at a height from the ground of at least
three meters.
It must be protected from direct sunlight and sited as far as possible from windows, doors, chimneys, etc which
can create direct thermal disturbances.
11. ELECTRICAL CONNECTIONS
Proceed as follows:
• SSeparate the case from the electronic module using the handles provided
• Mount the case on the panel door or on the composite control panel back plate and secure it
• Make the electrical connections according to the wiring diagram and in respect of the safety regulations in force,
using the following cable types:
– 1.5 mm
2
for power supply and the relay control outputs
– 1 mm
2
for the detectors and the remote control
• Apply power (230 V~) and check its presence across terminals 2 and 3
• Switch off power, insert the electronic module in the case, pressing it as far as it will go.
13. OPERATION
RTE 98. is an analogue compensating controller for:
– compensated control of a heating circuit. Three-wire control of a motorized valve or On-Off of single-stage burners
and On-Off of circulation pump.
13.
1
Control curve
The flow temperature requested by the controller (detector B1) is changed in relation to the
outside
tem pe ra tu re
(detector B2) and to the
heating control curve
.
The controller compares the actual value of the flow temperature with that corresponding to the curve and, in the
event of a difference, adjusts, with PI control action (Proportional Band Bp and Integral Time ti, both preset), the
motorised valve to cancel this difference.
B1 – Flow detector
B2 – Outside detector
R – Remote control
C – Curve adjustment
E – Boiler
M – Pump
N – RTE 98. controller
Y – Valve
0 – Valve closed
10 – Valve open
Pb – Proportional band
∆
t – On-Off differential
On – Burner On
Off – Burner Off
Ta – Desired ambient temperature
te – Actual outside temperature
tm – Actual flow temperature
Tm – Desired flow temperature
12. EXAMPLE OF CONTROL

4
B 217 - RTE 98. Eng.
25.09.07 LB
REV. 01
We reserve the right to make changes without notice
COSTER
D 33191
HEATING CURVE
14. SETTING
• Adapt the controller to the speed of the actuator using the programmer on the upper printed circuit.
• Set the value of the plant factor “K” taken from the table given below according to the climatic zone in which the
plant is located.
• Set the desired “Normal” and “Setback” ambient temperatures by means of the respective “Sun” and “Moon”
potentiometers.
• Set the “Normal” and “Setback” operating programmes on the programming timeswitch:
– Red riders : start of “Normal” operation
– Blue riders : start of “Setback operation.
• Set the actual time of day on the dial of the 24-hour clock and the actual time of day and the day on the 7-day
one.
• Adjust, if necessary, the slope of the heating curve using the potentiometer C.
COSTER TECNOLOGIE ELETTRONICHE S.p.A.
Sede Legale: 20132 Milano - Via San G.B. De La Salle, 4/a
E-mail: [email protected] Web: www.coster.eu
COSTER
CONTROLLI
TEMPERATURA
ENERGIA
Head Offi ce & Sales
Via San G.B. De La Salle, 4/a
Tel. [phone]
20132 - Milano Fax [phone]
Orders Fax [phone]
Reg. Off. Central & Southern
Via S. Longanesi, 14
Tel. [phone]
00146 - Roma Fax [phone]
Shipping
Via Gen. Treboldi, 190/192
Tel. [phone]
25048 - Edolo (BS) Tel. [phone]
ISO 9001:2000
®
THE INTERNATIONAL CERTIFICATION NETWORK
Registration Number: IT - 34674
CSQ - Certificate N. 9115.COEE
Amendment to data sheet
Date
Revision No.
Page
Section
Details of amendments
25.09.07 AM
01
2
9. WIRING DIAGRAM
The numbers of the terminals shown in the actuators have been eliminated