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D 215 - RTR 684 C2 Eng. 14.06.00

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COSTER

11. COMMUNICATION

11.1 C-Ring : communication between controllers (for detailed information please see technical data sheet T 022)

RTR 684 controller can be “Primary” or “Secondary”.

In C-Ring the following signals are transmitted :

– permission to operate as Slave controllers

– value of the outside temperature (use of a single detector for several controllers)

– value of flow temperature requested by controllers heating zones, used by “PRIMARY”

controller for control of temperature boilers (if scheduled).

– DHW priority and / or anticondensing = closure valves heating zones by modulating control

action.

NO = connection to C-Ring not scheduled

PRIMARY = connected to C-Ring and configured as “Primary”

SECONDARY = connected to C-Ring and configured as “Secondary”

11.2 C-Ring wiring diagram

24.2

CR i ng connec t i on

12. OPERATION

RTR 684 is a digital controller with microprocessor which can control temperature in two zones each

with independent settings and programmes of timed events :

• Primary control

• Auxiliary control

It is indispensable to configure the controller according to the detectors and controls connected.

13. PRIMARY CONTROL

RTR 684 can operate with two different and independent measurement ranges :

• 0…99 °C (hot water) : detector B1, terminals B1-M

• 0…40 °C (cold water or ambient) : detector B3, terminals B3-M

Note It is not possible to configure both the detectors (B1 and B3).

RTR 684 can control by two different systems :

• With only the primary detector (B1 or B3)

• With the primary detector (B1 or B3) and the flow detector (B2)

13.1 Control with primary detector only (B1 or B3)

RTR 684 compares desired temp. T

°d from current programme chosen in

with temperature measured by detector B1 or B3 and adopts control action Y1 or

E1 according to temperature difference and parameters set :

•

Prop Band : – – . – c

= proportional band Pb in ± °C

•

Integ time : – – m

= integral time in minutes

•

Diff : – – . – c

= On-Off diferential of stage ∆ t°

•

Integ time : – – m

= integral time in minutes

Con f i g de t ec t o r s

1––––––

24.1

Prop band : 10 . 0c

Integ time: 10m

22.3

Con t r o l :

MODULATI NG

22.1

Con t ro l :

ON- OFF D I FF

22.1

Di f f :10.0c

Integ time: 10m

22.5

Con f i g de t ec t o r s

1–

24.1

Con f i g de t ec t o r s

–3

24.1

Pri:------------

2 4HOUR 1 PR I MARY

19.2

D D D

Primary

Secondary

or Slave

Secondary

or Slave

outside

detector

DHW

detector

t°

100%

–

T°

50%

t°

∆t°

off

–

T°

∆t°

off

E1.2

E1.1

1 2 3 4 5 6 7 8 9 10 11 12 ... 19 20

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Detecto EB-60-215 Manual de usuario Pagina 7

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