Danfoss EPU 2370 Instructions Manual

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Contents

Installation ........................................ 2-4

Electrical connections

and wiring diagram .......................... 5-6

Selection of system type ................... 7

Setting of system type ....................... 8

Operation ........................................ 9-10

- program time switch

- + and - keys

- position selector

- function selector

Time control ................................. 11-12

- external time switch

- override with ESME

- provisional override to normal

temperature

BC-HM

Instructions (user manual)

EPU 2370

External setpoint .............................. 12

General frost protection .................. 12

Digital settings ............................. 13-21

System types ................................ 22-48

- operation

- position overview (matrix)

- position function description

(pages 15-21)

- see overview on page 7

Table of Contents

Summary of Contents for Danfoss EPU 2370

Page 1: Table Of Contents
- + and - keys - see overview on page 7 - position selector - function selector Time control ......... 11-12 - external time switch - override with ESME - provisional override to normal temperature VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 2: Installation
The control can be mounted on a 35 mm DIN rail. The base must be fastened by a spring (available as an accessory) which must be fitted at the rear of the base before mounting on the DIN rail. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 3 Several EPU 2370 controls, side by side Panel mounting Wall mounting or on DIN rail Removal from panel When the control is mounted in a panel cutout the easiest way to remove it is to depress the retainer springs on the rear and press it out of the cutout.
Page 4 Then secure time switch and frame with the screws provided. Replacement of time switch The time switch can be removed after the screws have been taken out by carefully tilting it from the top with a small screwdriver. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 5: Electrical Connections And Wiring Diagram
ESMR/T External time switch/override ECA 9010 3 - 4 Communication BUS 1 - 2 Note! Wire resistance can give measurement corresponds to a temperature increase error. A resistance of 4 ohm of about 1 degree. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 6 The above wiring diagram shows all connection possibilities for sensors, etc. In the individual system types, the necessary electrical connections are shown with full lines. The remaining possibilities are chain-dotted (see system types on pages 22-48). VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 7: Selection Of System Type
Selection of system type EPU 2370 is a multipurpose control for use with several different types of systems. Therefore the type of system must be selected before the control is operated. The selection procedure is as follows: 1) Connect sensors, 2) Connect voltage, 3) Select system type.
Page 8: Setting Of System Type
- Refit the black cover plate. Control operates according to factory- set values. Note If the factory-set values in the control are to be changed, see the pages 13-48 or contact Danfoss. Display of actual temperature VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 9: Operation
The diode indicates as follows: - lights up constantly when the control is on. - flashes when an alarm signal is registered. At the same time, an alarm code can be read off in P7.1. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 10 R1 (I) R2 (II) 0 = open contact 1 = closed contact In P0.0 the relay status and motor function are displayed by horizontal bars. A horizontal bar means closed contact, see page 15, P0.0 VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 11: Function Selector
The contact set must be connected to one of the ECA 9010 inputs. The following time control functions are possible: ECA 9010 Function terminal Normal temperature 2 and 3 Reduced temperature 1 and 3 VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 12: Override With Esme
P5.3 (approx. 2 Ω/ degree). General frost protection It is also possible to protect the system EPU 2370 has a frost protection function against frost at any point by connecting which ensures that the measured a separate S3 sensor. Frost protection temperature at the sensors does not fall limits must be set in P3.1 (see digital...
Page 13: Digital Settings
3 and 4 to column 4. (See twice. position overview (j) on next page). Position selection The switch (f) selects a row between 0 and 9, keys + and - select a column between 0 and 4. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 14: Position Overview (Matrix)
±(0-20) 0-30 P8.0 Normal temperature -20 to 110 °C P9.0 Reduced temperature -20 to 110 °C See description of position functions, pages 15-21. Factory settings are shown under the system type concerned, see pages 22-48. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 15 Time control - channel 3 on ECA 9020 or channel 1 on master control. Time control - channel 4 on ECA 9020 or channel 2 on master control. Override of relay output R1 possible with external override unit or with function selector, irrespective of setting in P0.3. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 16 Setting of valve motor running time from fully closed to fully open valve for the valve/ motor combination selected. When the correct time for the motor/valve combination is set, the Tn integration time can be set in seconds (P3.4). VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 17 Setting of integration time - Tn. The integration time expresses the time that elapses until the I-function has changed the output signal like the P-function. A short integration time gives fast control but with large overshoot (risk of instability). VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 18 Setting of middle temperature - setting range for external potentiometer. Note: The input to external setpoint has a time constant of 1 minute. P5.4 Maximum limiter in PI circuit: -20 to 110°C Setting of highest permissible temperature in PI circuit. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 19 Setting of temperature giving base point for compensation I. Compensation influences sensor S1 reference. The value indicates the temperature at which compensation begins. The sign indicates maximum or minimum compensation. (+): max. compensation (-): min. compensation VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 20 The sign of the value indicates increase or reduction of reference temperature on compensation. (+): reference increased (-): reference reduced P6.4 Minimum limitation in PI circuit: -20 to 110°C Setting of lowest permissible temperature in PI circuit. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 21 S2 in P + PI control. P9.0 Reduced temperature: -20 to 110°C Setting of required reduced temperature. The setting applies to sensor S1 in PI control or sensor S2 in P + PI control. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 22: System Types
System 1-B - Hot-water-service system with storage tank (flow control) Control principle for 1-A and 1-B: valve control M in heat exchanger/tank PI control of hot-water-service primary circuit. temperature (tap temperature) at S1. Circulation pump P1 controlled by relay Temperature held constant by motor VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 23 Relay 1 Relay 2 condition Standby Reduced time switch Normal time switch Frost On changing over from normal to reduced, R1 is delayed 3 minutes. 0 = open relay contact 1 = closed relay contact VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 25 Normal hot water-service temperature Setting in connection with sensors S3 and S4 F: 50 °C and ext. setpoint S5 P9.0 Factory setting Reducered hot- water-service temperature F:40 °C For further information see page 15 to 21. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 26 System types 1-D and 1-E - Hot-water-service systems System 1-D - Hot-water-service system with storage tank charging (circulation through tank) System 1-E - Hot-water-service system with storage tank charging (circulation through exchanger) VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 27 P1.2. P1.2 = 0 Valve closes, but the system is frost protected at 6°C (system 1-D) P1.2 = 1 Charging temperature maintained, but charging pump stopped (system 1-E). VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 29 Settings in connection with sensors S3 and S4 F: 50 °C and ext- setpoint S5 P9.0 Factory setting Reduced hot water-service temperature F: 40 °C For further information see page 15 to 21. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 30 System 2-B - Radiator system with constant room temperature control Control principle valve control M. Circulation pump P1 PI flow temperature control (S1) and P controlled by relay R1. room temperature control (S2). Room temperature held constant by motor VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 31 Pump constantly cut in. 1 = closed relay contact Valve closes and pump stops until room temperature falls to the required temperature. Valve then opens and pump starts until room temperature has risen 1 degree. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 33 Settings in connection with sensors S3, S4 and S6, F: 60 20 °C and ext. setpoint S5 P9.0 Factory setting Reduced flow/room temperature F: 40 15 °C For further information see page 15 to 21. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 34 S1 is set in P6.2 and P6.3 in P7.2 and P7.3 increased and thereby the valve respectively. opens. If it is not possible to reach 6°C in the return, the fans stop. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 35 The valve is then opened and fan started until the temperature has risen 1 degree. - Relay status for different operating situations with this system is as follows: VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 37 Settings in connection with sensors S3, S4 and S6, F: 20 °C and ext. setpoint S5 P9.0 Factory setting Reduced room temperature F: 15 °C For further information see page 15 to 21. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 38 System 4-B - Floor heating with constant room temperature Control principle temperature held constant by motor PI flow temperature control (S1) and P valve control M. Circulation pump room temperature control (S2). Room controlled by relay R1. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 39 0 = open relay contact cut in. 1 = closed relay contact Valve closes and pump stops until room temperature falls to the required temperature. Valve then opens and pump starts until room temperature has risen 1 degree. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 41 F: 40 20 °C P9.0 Settings in connection with sensors S3, S4 and S6, Reduced and ext. setpoint S5 flow/room temperature Factory setting F: 30 18 °C For further information see page 15 to 21. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 42 M PI control of supply air temperature (duct in heat exchanger primary circuit. Fan temperature - S1) and P room P1 controlled by relay R1, damper P2 by temperature control (S2). Temperature relay R2. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 43 8 and 9. temperature. - Warm start function. Relay R1 cut-in is delayed in order to counter cold 0 = open relay contact supply air at the changeover from 1 = closed relay contact VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 44 Normal time switch*) Frost Wiring diagram - System types 5-A and 5-B WARNING! If no thermostat is connected, either a jumper (short circuit) or sensor S6 must be connected to terminals 8 and 9. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 45 F: 30 20 °C P9.0 Settings in connection with sensors S3, S4 and S6, Reduced and ext. setpoint S5 duct/room temperature Factory setting F: 20 15 °C For further information see page 15 to 21. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 46 Control principle PI control of brine temperature (S1) and motor valve M. Circulation pump P room temperature control (S2). Room controlled by relay R2 and fan P1 by temperature held constant by control of relay R1. VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 47 Fan constantly cut in. 0 = open relay contact Valve closes and fan stops until 1 = closed relay contact the room temperature has risen to the required temperature. Wiring diagram - System types 6-A and 6-B VI.72.M4.02 © Danfoss 11/97 BC-HM...
Page 48 Settings in connection with sensor S2 temperature F: 5 20 °C P9.0 Settings in connection with sensors S4 and S6, Reduced and ext. setpoint S5 temperature F: 10 30 °C Factory setting For further information see page 15 - 21. VI.72.M4.02 © Danfoss 11/97 BC-HM...

Danfoss EPU 2370 Instructions Manual

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