ENGLISH EN Electronic controllers for refrigeration units EWPLUS 902/961 UP KEYS Press and release Scrolls through menu items Increases values Press for at least 5 secs Activates the Manual Defrost function DOWN Press and release Scrolls through menu items Decreases values Press for at least 5 secs Configurable function by user (par.
LEDs Reduced SET / Economy Fan LED Compressor LED Aux LED Flashing: Quick flashing: Off: reduced set active access to level 2 parameters otherwise Permanently on: fans active Off: otherwise (only EW Plus 971 and EW Plus 974) Permanently on: compressor active Flashing: delay, protection or blocked start-up Off: otherwise Permanently on: Aux active* *depending on model (only EW Plus 971 and EW Plus 974) Defrost LED HEAT mode LED Permanently on: defrost active Flashing: manual or D.I.
ACCESSING AND USING THE MENUS Resources are organised into 2 menus which are accessed as explained below: • ‘Machine Status’ menu: press and release the set key. • ‘Programming’ menu: press for at least 5 secs the set key. Either do not press any keys for 15 seconds (time-out) or press the key once, to confirm the last value displayed and return to the previous screen. MACHINE STATUS MENU Access the “Machine Status” menu by pressing and releasing the set key.
PROGRAMMING MENU To access the ‘Programming’ menu press for at least 5 secs the set key. If specified, the ‘PA1’ for the level 1 parameters and the ‘PA2’ for the level 2 parameters access PASSWORD will be requested (see Par. ‘PASSWORD’) At the access, the display will show the first parameter (“diF”). By pressing the and keys you can scroll all parameters in the current level: set 5 secs set set Select the desired parameter using the and keys.
ALARMS Label Fault Cause Effects Remedy E1 Probe1 faulty (cold room) • reading of out of range operating values • probe faulty / short-circuited / open • Display label E1 • Alarm icon permanently ON • Min/max alarm regulator disabled • Compressor operation according to “Ont” and “OFt” parameters.
MANUAL DEFROST CYCLE ACTIVATION To manually activate the defrost cycle, hold down the key for 5 seconds. If the defrost conditions are not satisfied: - the parameter OdO ≠ 0 (EW Plus 902/961/971/974) - the evaporator probe Pb2 temperature is higher than the defrost end temperature (EW Plus 971/974) the display will flash 3 times, to indicate that the operation will not be carried out. DIAGNOSTICS Alarms are always indicated by the buzzer (if present) and the alarm icon .
USING THE COPY CARD The Copy Card is an accessory connected to the TTL serial port used for quick programming of the device parameters (upload and download a parameter map to one or more devices of the same type). Upload (label UL) and copy card formatting (label Fr) operations should be performed as explained below: set After the password ‘PA2’ has been putted in, press the and keys to scroll through to the required function (e.g. UL). Press the set key to execute the upload.
MAX/MIN TEMPERATURE ALARM Relative Temperature Value to setpoint (Att=1) Absolute Temperature Value (Att=0) Off AFd AFd AFd Setpoint LAL Setpoint - LAL Setpoint - LAL + AFd Setpoint + HAL LAL + AFd AFd HAL - AFd Setpoint + HAL - AFd Minimum temperature alarm Temp. ≤ Set + LAL * Temp. ≤ LAL (LAL with sign) Maximum temperature alarm Temp. ≥ Set + HAL ** Temp. ≥ HAL (HAL with sign) Returning from minimum temp. alarm Temp. ≥ Set + LAL + AFd or ≥ Set - ILALI + AFd (LAL < 0) Temp.
ELECTRICAL WIRING Attention! Never work on electrical connections when the machine is switched on. The device is equipped with screw or removable terminals for connecting electric cables with a diameter of 2.5mm2 (one wire per terminal for power connections). For the capacity of the terminals, see the label on the instrument. Do not exceed the maximum current allowed; in case of higher loads, use an appropriate contactor. Make sure the power supply voltage complies with the one required by the instrument.
CONDITIONS OF USE Permitted use For safety reasons the instrument must be installed and used according to the instruction provided and in particular, under normal conditions, parts bearing dangerous voltage levels must not be accessible. The device must be adequately protected from water and dust as per the application and must also only be accessible via the use of tools (with the exception of the frontlet).
FURTHER INFORMATIONS Input Characteristics Display Range: Accuracy: Resolution: Buzzer: Analogue Input: Digital Input: NTC: –50.0°C ... +110°C; PTC: –55.0°C ... +140°C (on display with 3 digit + sign) Better than 0,5% of full-scale + 1 digit 0,1 °C YES (it depends from model) EW Plus 902/961: 1 NTC input EW Plus 971/974: 2 NTC inputs 1 voltage-free digital input Output Characteristics Digital Output: EW Plus 902: 1 OUT1 relay: N.O. 8(4)A - N.C.
Regulations Electromagnetic compatibility: This device complies with Directive 2004/108/EC Security: This device complies with Directive 2006/95/EC Food safety: This device complies with standard EN 13485 as follows: - suitable for storage - cliamate range A - measurement class 1 in the range from -35°C to 25°C (*) (* exclusively using Eliwell NTC probes) NOTE: The technical data included in this document, related to measurement (range, accuracy, resolution, etc.
dOn 2 dOF 2 dbi 2 OdO (!) 2 delay (at) On compressor. Delay time in activating the compressor relay after switch-on of instrument. delay (after power) OFF. Delay after switch off; the indicated time must elapse between switchoff of the compressor relay and the successive switch-on. delay between power-on. Delay between switch-ons; the indicated time must elapse between two successive switch-ons of the compressor. delay Output (from power) On.
FAd Fdt dt 2 1&2 1&2 dFd 1&2 FCO 2 Fod 2 Att 2 FAn differential. Fan starting differential (see par. ‘FSt’). Fan delay time. Delay time in activating fans after a defrost operation. drainage time. Dripping time. defrost Fan disable. Allows to select the evaporator probes exclusion during defrost. y = yes (fan disable); n = no. Fan Compressor OFF. Allows to select compressor fans lock OFF (switched off).
DISPLAY LOC 1&2 PS1 PS2 ndt CA1 CA2 1&2 2 2 1&2 1&2 ddL 1&2 dro 2 ddd 2 H08 2 H11 2 LOCk. Setpoint change shutdown. See related paragraph. There is still the possibility to enter into parameters programming and modify these, including the status of this parameter to permit keyboard shutdown. n = no; y = yes. PAssword 1. When enabled (value ≠ 0) it constitutes the access key for level 1 parameters. PAssword 2. When enabled (value ≠ 0) it constitutes the access key for level 2 parameters.
H42 reL tAb 1&2 1&2 1&2 UL Fr 2 2 Evaporator probe present. n = not present; y = present. reLease firmware. Device version: read only parameter. tAble of parameters. Reserved: read only parameter. COPY CARD Up load. Programming parameter transfer from instrument to Copy Card. Format. Erasing all data in the copy card. (!) WARNING! • If one or more of these parameters highlighted with (!) are modified, the controller must be switched off and switched on again to ensure correct operation.
EW Plus 902: CONNECTIONS/ CONNESSIONI/ CONNEXIONS/ ANSCHLÜSSE EWPLUS 902 TTL A OUT1 N L 9 10 11 (thermostat) LOAD 3 4 5 6 7 D.I. Supply 4.
EW PLus 961: CONNECTIONS/ CONNESSIONI/ CONNEXIONS/ ANSCHLÜSSE EWPLUS 961 TTL A (A) Supply 4.5W max N L Pb1 TERMINALS/ MORSETTI/ BORNES/ KLEMMEN compressor relay / relè compressore / relais compresseur / Verdichterrelais N-L Power Supply / Alimentazione / Alimentation / Versorgung A TTL input / Ingresso TTL / Entrée TTL / TTL-Eingang D.I.
EW Plus 971: CONNECTIONS/ CONNESSIONI/ CONNEXIONS/ ANSCHLÜSSE EWPLUS 971 (A)( TTL A B) Supply 4.5W max 2 3 4 5 6 7 Pb2 Pb1 TERMINALS/ MORSETTI/ BORNES/ KLEMMEN defrost relay / relè sbrinamento / relais dégivrage / Abtaurelais compressor relay / relè compressore / relais compresseur / Verdichterrelais N-L Power Supply / Alimentazione / Alimentation / Versorgung A TTL input / Ingresso TTL / Entrée TTL / TTL-Eingang D.I.
EW Plus 974: CONNECTIONS/ CONNESSIONI/ CONNEXIONS/ ANSCHLÜSSE EWPLUS 974 (C) (A)( TTL A B) Supply 4.
Parameters (Parametri/Paramètres/Parameters) - Default setting PAR SEt diF HSE LSE HC OSP dOd dAd Ont OFt dOn dOF dbi OdO dty dit dCt dOH dEt dSt dPO FPt FSt FAd Fdt dt dFd FCO Fod Att AFd HAL LAL EW Plus 902/961 RANGE DEFAULT -50,0 ... 99,0 0,0 +0,1 ... +30,0 2,0 LSE ... +230 99,0 -55,0 ... HSE -50,0 H/C C -30,0 ... +30,0 3,0 n/y n 0 ... 255 0 0 ... 250 0 0 ... 250 1 0 ... 250 0 0 ... 250 0 0 ... 250 0 0 ... 250 0 ----0 ... 250 6 0/1/2 1 0 ... 59 0 1 ...
EW Plus 902/961 EW Plus 971 EW Plus 974 RANGE DEFAULT RANGE DEFAULT RANGE DEFAULT PAO 0 ... 10 0 0 ... 10 0 0 ... 10 0 dAO 0 ... 999 0 0 ... 999 0 0 ... 999 0 OAO 0 ... 10 0 0 ... 10 0 0 ... 10 0 tdO 0 ... 250 0 0 ... 250 0 0 ... 250 0 tAO 0 ... 250 0 0 ... 250 0 0 ... 250 0 dAt ----n/y n n/y n EAL n/y n n/y n n/y n dEA 0 ... 14 0 0 ... 14 0 0 ... 14 0 FAA 0 ... 14 0 0 ... 14 0 0 ... 14 0 LOC n/y n n/y n n/y n PS1 0 ... 250 0 0 ... 250 0 0 ... 250 0 PS2 0 ... 250 15 0 ... 250 15 0 ...
Eliwell Controls s.r.l. Via dell’Industria, 15 • Z.I. Paludi 32010 Pieve d’Alpago (BL) ITALY Telephone +39 0437 986 111 Facsimile +39 0437 989 066 www.eliwell.it Technical Customer Support: Technical helpline +39 0437 986 300 E-mail: techsuppeliwell@invensys.com Sales Telephone E-mail: +39 0437 986 100 (Italy) +39 0437 986 200 (other countries) saleseliwell@invensys.com cod. 9IS54151-1 - EW Plus 902/961/971/974 - EN - rel. 04/10 © Eliwell Controls s.r.l. 2009-2010 All rights reserved.
