Rehau Nea H Service Manual
Hide thumbs
Also See for Nea H:
- Operating instructions manual (12 pages) ,
- Installation and operating manual (9 pages) ,
- Service manual (32 pages)
Table of Contents
Advertisement
Quick Links
- 1 System Components Nea
- 2 Functional Overview
- 3 Installation
- 4 Wiring of Room Temperature Controllers Nea H, Nea Ht to Wiring Centre Nea H 230V / 24V
- 5 Wiring of Room Temperature Controllers Nea Hct to Wiring Centre Nea Hc 24V
- 6 Parameterization and Special Functions
- 7 Introduction
- Download this manual
Advertisement
Table of Contents
Related Manuals for Rehau Nea H
Summary of Contents for Rehau Nea H
- Page 1 SERVICE-MANUAL ROOM TEMPERATURE CONTROLLER NEA 230V / 24V Construction Automotive Industry...
-
Page 2: Table Of Contents
3.3..Wiring of room temperature controllers Nea H, Nea HT without use of wiring centre ....3.4.. -
Page 3: Information And Safety Guidelines
Navigation - Please keep the manuals and hold them for disposal. - Please contact your REHAU sales office in case that safety At the beginning of this manual you will find a detailed table of guidelines or certain installation steps are not understood contents with hierarchical headlines and the corresponding page or are unclear. - Page 4 - Use only the intended components for the respective RE- HAU system. The use of components or tools from other companies which are not from the respective REHAU in- stallation system can lead to accidents or other dangers. Copyright by REHAU...
-
Page 5: System Description
Wiring centre for room temperature controllers, actuators and System components Nea timer. Room temperature controller Nea H, Nea HT und Nea HCT Room temperature controller for 230V AC or 24V AC for the applications heating and heating / cooling. Fig. 2-3 Wiring centre Nea H und Nea HC... -
Page 6: Functional Overview
SERVICE-MANUAL ROOM TEMPERATURE CONTROLLER NEA 230V / 24V Functional overview Nea H Nea HT Nea HCT Heating Cooling Temperature reduction by internal time switch program Temperature reduction by external „Timer Nea“ possible Display of current temperature Display of current time and weekday... -
Page 7: Technical Data
Remote temperature probe Nea Sensor type NTC 10K (10 kOhm,1 % at 25 °C) Cable length Protection class IP 67 Timer Nea Operating voltage 230 V AC Number of memory locations Power reserve 10 years Copyright by REHAU Page 7 of 30... - Page 8 Safety transformer according EN 61558 Conditionally short-circuit proof with integrated over-temperature protection Connecting cable (primary side) with moulded-in plug, length 100 cm Cable on secondary side 30 cm Mounting plate included, with clipses for mounting rail Copyright by REHAU Page 8 of 30...
- Page 9 Degree / class of protection IP 54/II Housing Polyamide / grey Connecting cable 2 x 0,75 mm², 1 m Dimensions W x H x D 44 mm x 58 mm x 47 mm Copyright by REHAU Page 9 of 30...
-
Page 10: Installation
Only wiring centres Nea HC and room temperature controllers Nea HCT may be used in heating/cooling-applications! A mixed use of room temperature controllers Nea HCT together with room temperature controllers Nea H or HT is not possible! Copyright by REHAU... -
Page 11: Wiring Of Room Temperature Controllers Nea H, Nea Ht To Wiring Centre Nea H 230V / 24V
When the controller is in normal operating mode or in reduced operating mode, the external signal is void. Nea HT: The same as for controller Nea H is valid, but in operating mode „time switch program“ the mode (normal/reduced) defined by the internal time switch program is overwritten by the external signal (Force of reduced mode). -
Page 12: Wiring Of Room Temperature Controllers Nea H, Nea Ht Without Use Of Wiring Centre
ROOM TEMPERATUR CONTROLLER NEA 230V / 24V Wiring of room temperature controller Nea H and Nea HT without use of wiring centre Fig. 3-3 Wiring of room temperature controller Nea H and Nea HT without use of wiring centre Note: The signal for reduced mode has to be potential L (230V-systems) or L1 (24V-systems). -
Page 13: Wiring Of Room Temperature Controllers Nea Hct To Wiring Centre Nea Hc 24V
Blocking of cooling mode is done by parameter PE9. It is not provided to connect controllers Nea H or Nea HT to a wiring centre Nea HC 24V. These controllers are only designed for installations with solely heating mode and would have to be blocked in cooling mode by additional actions. -
Page 14: Wiring Of Room Temperature Controllers Nea Hct Without Use Of Wiring Centre
In installations with more than one feed-in of operating voltage (e.g. several manifolds and therefore several wiring centres) phase equality must be observed as soon as there is any electrical connection between the groups of control systems! Copyright by REHAU Page 14 of 30... -
Page 15: Use Of Dew Point Monitors
The maximum power consumption of the TPW is 1 VA. Because of this the power supply 24 V of the wiring centre can be used. The switching capacity of the TPW is 24V, 1A, and therefore sufficient for 5 actuators. Copyright by REHAU Page 15 of 30... -
Page 16: Wiring Of Timer Nea To Wiring Centre Nea
When terminals 3 and 6 of timer Nea are used, programming of timer has to be done in a way, that time periods with normal mode are ON, the time periods with reduced mode are OFF. The shown connection method is valid for all types of wiring centres Nea. Copyright by REHAU Page 16 of 30... -
Page 17: Wiring Of A Pump To Wiring Centres Nea With Pump Module
Note the maximum switching capacity of the pump relay in the wiring centre (5A 230 V AC, 1 A 24 V DC). The shown connection method is valid for all types of wiring centres Nea with option “pump module”. Copyright by REHAU Page 17 of 30... -
Page 18: Parameterization And Special Functions
Value can be changed within the input limits using the - keys Confirm the value with Enter/Exit – key on the side Leave service or expert-level by pressing quickly Enter/Exit – key twice (double click) Copyright by REHAU Page 18 of 30... -
Page 19: Service Level
*1) Press all 3 keys at the same time for about 3 seconds, enter password 410 Key lock will be overruled for 30 min, in this time frame parameter PS09 can be set back Copyright by REHAU Page 19 of 30... - Page 20 Comment: The state of output is also displayed in end user level with the „heating“ or „cooling“ symbol. PS23 Number of connected Only 24V-controllers: actuators Number of actuators directly connected to switching output Copyright by REHAU Page 20 of 30...
-
Page 21: Expert Level
After switching operation mode from heating switching heating / to cooling or reverse the output signal will be cooling blocked for this time span [min]. The new operating mode starts to be active after this time. Copyright by REHAU Page 21 of 30... - Page 22 PE19 Upper limit floor tem- Upper limit of floor temperature, valid when perature PE17=1 and 2 (in heating mode floor tem- perature will not exceed this value). Copyright by REHAU Page 22 of 30...
- Page 23 (The input is done in 3 sequentially screens) Comment: Week 5 indicates, that the last sunday of the month is selected PE25 Reset to factory set- After selecting YES all default settings are tings loaded and the controller restarts Copyright by REHAU Page 23 of 30...
-
Page 24: Special Functions
Connection of more than 1 actuators to controller Nea 24 V If more than 1 actuator is connected to a controller Nea 24 V the number of actuators has to be inserted in parameter PS23 (only Nea 24V). Copyright by REHAU Page 24 of 30... -
Page 25: Error Messages
-30 to 50°C improper temperature influences, range Replace controller Nea Interruption of room tempera- Internal probe defective Replace controller Nea ture probe Short circuit of room tempera- Internal probe defective Replace controller Nea ture probe Copyright by REHAU Page 25 of 30... -
Page 26: Troubleshooting
Flow temperature to low Check system Floor temperature to low in cooling mode If configured: measured value of floor tempera- Check whether displayed value (PS21) and ture probe above lower limit set point is realistic. Copyright by REHAU Page 26 of 30... - Page 27 Dew point monitor without function Check function and cabling of dew point monitor Display light deactivated Check parameter PS12 No display lighting Controller not energized Check fuse in controller or wiring centre Copyright by REHAU Page 27 of 30...
-
Page 28: Glossary
SERVICE-MANUAL ROOM TEMPERATURE CONTROLLER NEA 230V / 24V Glossary Proportional band The proportional band – better said the width and the position – Monitoring of floor temperature characterizes the control behaviour of a proportional controller. Floor temperature monitoring by Nea HCT is done by using an The output signal of the controller descends from 100% begin- optional external temperature probe, used as a floor temperature ning from one end of the proportional band to 0% on the other... - Page 29 Because of this the controller has a stronger response to a deviation from set point when the width of the proportional band is reduced. In the 2nd example the control signal rises starting from 50% to 75% and then 90%. Copyright by REHAU Page 29 of 30...
- Page 30 Valve exercise Valves which are not activated for a long time might stick. To prevent this, the valve actuator switched on once a week for 5 minutes when valve exercise (PE16) is enabled. Copyright by REHAU Page 30 of 30...