Related Manuals for Nordmann Engineering AT4
Summary of Contents for Nordmann Engineering AT4
- Page 1 NORDMANN E N G I N E E R I N G Nordmann AT4 Steam humidifier Service Manual 2559457 EN 1202...
-
Page 3: Table Of Contents
Notes on humidity control systems with limitation of the supply air humidity Water management The SC system of the Nordmann AT4 The use of softenend water for the operation of the Nordmann AT4 Block diagrams Block diagram CPU Block diagram power board... -
Page 4: Introduction
Nordmann AT4. It is also as- sumed that the Service technician has notice of the mounting instructions as well as of the operating instructions of the Nordmann AT4 and that he is familiar with the dangers when working on the unit. -
Page 5: Settings In The Engineering Level
Settings in the engineering level Launching the Engineering level Select the engineering settings menu: Path: Main menu > User > Password entry: 1055 > Engineering AT4 130kg/h 400V3 Main Menu Engineering Benutzer :Set Max.op.hr SC:5000h Standby Engineering :Set Drain Cool... -
Page 6: Setting Gfci Operation
Notes on the function “Ship” The “Ship” function is used if the Nordmann AT4 is installed on a vessel. On vessels fault currents are monitored much more exactly than elsewhere, since these lead to an increased corrosion of the ship trunk. -
Page 7: Set Multimode Operation For Double Units
If the current is always too high after a filling cycle of 30 seconds (InletFactor 1), the filling time can be reduced up to 15 seconds (=> inlet factor 0.5). Or vice versa if it always takes 2 – 3 filling cycles to reach the desired current value, the filling time can be increased up to 60 seconds (=>... -
Page 8: Setting The Interval Time For The Cylinder Rotation In Sequential Operation
Setting the interval time for the cylinder rotation in sequential operation Note: this setting appears only if Multimode operation is set to “Sequence” and cylinder rotation is activated (On). Select “Seq.Interval” in the engineering menu, then press the <Set> key. Engineering Seq.Rotation GFCI... -
Page 9: Setting The On/Off Hysteresis
Notes on settings For the heating current monitoring, there are two overcurrent thresholds: – The threshold for the excess current is set to 135% of the maximum nominal current (dash-dotted line in the following diagram). This threshold value is fixed and leads always to a draining of the cylinder and to an emergency shut-down (Error E25) when exceeded. -
Page 10: Activate/Deactivate Error Message For Open Safety Chain
Default :Set Test Screens:Off STARTUP: INIT MODULE AT4 130kg/h 400V3 Standby 2011-02-15 12.00.00 Menu The reset dialogue shows up in the display. Press the <Yes> key to reset the control to factory set- tings. The control is reset to factory settings and restarted. -
Page 11: Activate/Deactivate The Test Screens
2.13 Activate/deactivate the test screens With this function you can activate the test screens to carry out different function tests. The test screens are not discussed in the service manual. Select “Test Screens” in the engineering menu, then press the <Set> key. Engineering Test Screens Overcurrent :Float... -
Page 12: Malfunctions
Malfunctions Operating malfunctions W20, E20 Safety chain open Function: indicates that the safety chain is open. Procedure: if the safety chain is open the system is blocked and the warn- ing message W20A is shown. By setting the option “Rem.SafChain” in the engineering level to On an open safety chain triggers the Error E20 and the error relay is activated. - Page 13 W22, E22 Maximum filling time and W23, E23 No electrode current Function: monitoring of the filling cycle Procedure: if the filling cycle ist not finished within 20 minutes (maximum filling level or reference current not reached) a warning is triggered. If the current is below 1.5 % warning W23 is triggered otherwise warning W22.
- Page 14 W24, E24 Electrode current too high Function: monitoring of the heating current (Phase L1) Procedure: if a overcurrent is detected the main contactor is switched off immediately, a draining is carried out and the Warning W24 is triggered. Subsequently, the main contactor is activated again. If overcurrent occurs again, the process is repeated.
- Page 15 W25, E25 Maximum admissible electrode current exceeded Function: monitoring of the heating current (Phase L1) Procedure: if a overcurrent is detected the main contactor is switched off immediately, a draining is carried out and the Warning W25 is triggered. Subsequently, the main contactor is activated again. If overcurrent occurs again, the process is repeated.
- Page 16 E26 Heating voltage contactor jammed Function: current monitoring while the contactor is switched off. Procedure: if during operation with deactivated main contactor a current higher than 1.5 % is registered the error E26 is triggered and the unit is blocked. Error E26 is triggered and the system is blocked too, if during the calibration of the unit (after switching the unit on) a certain current value is exceeded.
- Page 17 Behaviour on activation: Warning Error Display W27A(B): Foam E27A(B): Foam LED display: Red lights Fault-Remote: Error Relay Error-History: W27A(B) E27A(B) System: Corresponding module is draining Corresponding module blocked and cyl- inder draining Time delay: 30 minutes 24 hours Reset: automatic reset Unit Off/On W28, E28 Steam cylinder used Function: monitoring of the steam cylinder on lime deposits at the electrodes.
- Page 18 W29, E29 Max. operating hours of steam cylinder reached Function: monitoring the steam cylinder on max. operation hours. Procedure: if the operating hours of the steam cylinder has reached the set maximum value the Warning W29 is triggered. Further 72 hours of operation are possible after the warning message before the error E29 is triggered.
- Page 19 W33, E33 Limit humidity sensor defective Function: Monitoring of the humidity signal at the limiter input (sensor interruption). Procedure: the monitoring is active only, if the internal controller (“Int.P” or “Int.PI”) is activated and the Function “Limiter” activated. If the humidity signal drops below the threshold of 3 % steam production is stopped and the warning W33 triggered.
- Page 20 E35 Modbus Timeout Function: monitoring for continuous transmission of the control/limiter signal (demand/humidity) via Modbus. Procedure: If the demand or humidity signal is transmitted to the unit via Modbus (SignalSource: Modbus) the signal must be updated in regular inter- vals. If within 5 seconds no new value is transmitted error E35 is triggered. Behaviour on activation: No Warning Error...
- Page 21 Behaviour on activation: Hinweis Error Display W36A(B): StandbyMod.active E36A(B): Idle Mode Failed LED display: Fault-Remote: Error Relay Error-History: E36A(B) System: Corresponding module is performing a Corresponding module blocked standby operation Time delay: 72h with standby draining div. Reset: Unit Off/On W37 Forced draining Function: Indicates forced draining is active.
-
Page 22: Humidity Control Systems
Humidity control systems Humidity control system without limitation of the supply air humidity 4.1.1 System 1: Room humidity control System 1 is suited for direct room humidification and air conditioning systems with mainly recirculated air. The humidity sensor or humidistat respectively is preferably located in the room itself or in the exhaust air duct. -
Page 23: Humidity Control System With Limitation Of The Supply Air Humidity
Humidity control system with limitation of the supply air humidity 4.2.1 System 2: Room humidity control with continuous limitation of the supply air humidity System 2 is suited for air conditioning systems with a large portion of supply air, low supply air temperature, post-humidification, or variable airflow volume. -
Page 24: System 3: Supply Air Humidity Control With Continuous Output Limit Ation
4.2.2 System 3: Supply air humidity control with continuous output limit ation Supply air humidity control (humidity sensor installed in supply air duct) should be used only where room humidity control is impracti- cable for technical reasons. Such systems always require a PI-controller. The humidity sensor (A1) is located in the supply air duct after the steam distribution pipe. -
Page 25: Notes On Humidity Control Systems With Limitation Of The Supply Air Humidity
Notes on humidity control systems with limitation of the supply air humidity For the better comprehensibility of the humidity control systems with limita- tion of the supply air humidity the following diagram is to be referred. Humidity and limitation controller Min.Limit= 70% / Max. -
Page 26: Water Management
Water management The SC system of the Nordmann AT4 Lime deposition in steam air humidifier is a well-known process that can’t be avoided if tap water is used for air humidification. Lime scaling on steam cylinder walls, valves and heating electrodes prevent reliable operation of the air humidifier, if the humidifier is not regularly maintained. -
Page 27: The Use Of Softenend Water For The Operation Of The Nordmann At4
The siphon in the drain line should be freely accessible to facilitate cleaning since increased lime deposits could occur. The use of softenend water for the operation of the Nordmann AT4 The use of softened water is not recommended for Nordmann AT4. Instead of the expected cylinder service interval increase, most likely functioning problems will appear. - Page 28 8. Check installation of the humidifier and steam distribution according to the mounting instructions Nordmann AT4. 9. The drain water quantity of the Nordmann AT4 must be increased. Check the following water management settings in the user settings level of...
-
Page 29: Block Diagrams
Block diagrams Block diagram CPU... -
Page 30: Block Diagram Power Board
Block diagram power board... - Page 31 © Nordmann Engineering Ltd., Printed in Switzerland Technical modifications reserved...
- Page 32 NORDMAN econ Dampfluftbefeuchter E N G I N E E R I Reg.No. 40002-2 NORDMANN Manufacturer: Nordmann Engineering Ltd. E N G I N E E R I N G www.nordmann-engineering.com, info@nordmann-engineering.com...