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Summary of Contents for Eliwell EZ-HT
- Page 1 EZ-HT / EZ-MT / EZ-LT Electronic controllers for refrigeration units...
- Page 2 EZ-HT / EZ-MT / EZ-LT USER INTERFACE KEYS STAND-BY (ESC) - ON/OFF Press and release Press and release • Returns to the previous menu level • Scroll menu items • Confirms parameter value • Increases values Press for at least 5 sec Press for at least 5 sec •...
- Page 3 LEDS Reduced SET / Economy LED Fans LED Flashing: reduced set active Permanently on: fans active Off: otherwise Off: otherwise Compressor LED Defrost LED Permanently on: compressor active Permanently on: defrost active Flashing: delay, protection or activation Flashing: activated manually or from DI. blocked Off: otherwise...
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Page 4: Mounting Dimensions
MOUNTING - DIMENSIONS The device is designed for panel mounting. Drill a 71x29 mm (2.80x1.14 in.) hole and insert the instrument; secure it with the special brackets provided. Do not install the device in places subject to high humidity and/or dirt; it is intended for use in sites with ordinary class of pollution. Keep the area around the instrument cooling slots adequately ventilated. - Page 5 DANGER LOOSE WIRING CAUSES ELECTRIC SHOCK Tighten connections in conformance with the torque specifications. Failure to follow these instructions will result in death or serious injury. The table below displays the type and the size of cables for disconnectable terminals with pitch 5.00 mm (0.197 in.) or 5.08 mm (0.2 in.). 0.28 2 x 0.5...1.5 0.2…2.5...
- Page 6 Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. No responsibility is assumed by Eliwell for any consequences arising out of the use of this material. WARNING UNINTENDED EQUIPMENT OPERATION • Use appropriate safety interlocks where personnel and/or equipment hazards exist.
- Page 7 CONNECTION EZ-HT TERMINALS Compressor relay Power supply input (230 Vac) Power Supply Power supply (230 Vac) 9 10 9-10 Pb1 probe 10-11 Digital input TTL input EZ-MT/EZ-LT TERMINALS Fans relay Compressor relay Power Supply 5-6-7 Defrost relay 8 9 10...
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Page 8: Further Information
PTC: –55.0 ... 140 °C (-67.0 ... 284 °F) (on 3-digit display with ± sign) Accuracy: Better than 0.5 % of full-scale +1 digit Resolution: 0.1 °C / °F Buzzer: Depending on model Analogue Inputs: EZ-HT: 1 NTC/PTC Input - EZ-MT / EZ-LT: 2 NTC/PTC input Digital input: 1 D.I. voltage free... - Page 9 • climate range A • measurement class 1 in the range -25 ... 15 °C (-13 ... 59 °F) (*) (* exclusively using Eliwell probes) NOTE: The technical specifications stated in this document regarding measurement (range, accuracy, resolution, etc.) refer strictly to the...
- Page 10 DIAGNOSTICS Alarms are always indicated by the buzzer (if present) and the alarm icon . To switch off the buzzer, press and release any key; the corresponding icon will continue to flash. N.B.: If alarm exclusion times have been set the alarm will not be signalled. •...
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Page 11: Max/Min Temperature Alarms
Label Description Cause Effects Remedy • Recording of label EA in folder AL Check and remove the external Digital input activated External alarm • Alarm icon permanently on cause which triggered the alarm (H11 = ±5) • Regulation locked if rLO = y on the D.I. -
Page 12: Programming Menu
PROGRAMMING MENU To access the Programming menu hold down the key for longer than 5 seconds. If enabled, the instrument will request an access PASSWORD, either PA1. When accessed the display will show the first parameter (diF). Press to scroll through all of the parameters in the current level. -
Page 13: Accessing And Using The Menus
ACCESSING AND USING THE MENUS The resources are organised into 2 menus which are accessed as follows: • Machine Status menu: press and release the key. • Programming menu: hold down the key for 5 seconds. Either do not press any keys for 15 seconds (timeout) or press the key once, to confirm the last value displayed and return to the previous screen. -
Page 14: Parameters Table
0 = Not active. Interval between the start of two consecutive defrost cycles. hours 0 ... 250 0 = Function disabled. *EZ-HT: 1.0 ...18.0 °C / °F; EZ-MT: -15.0 ... 5.0 °C / °F; EZ-LT: -30.0 ... -10.0 °C / °F... - Page 15 PAR. DESCRIPTION M.U. RANGE EZ-HT EZ-MT EZ-LT Type of defrost. 0 = Electric defrosting - compressor OFF during defrosting; 0/1/2 1 = Reverse cycle defrost (hot gas) - compressor ON during defrosting; 2 = ‘Free’: defrost independent of compressor. Selects the count mode for the defrost interval.
- Page 16 PAR. DESCRIPTION M.U. RANGE EZ-HT EZ-MT EZ-LT drainage time. Coil drainage time. 0 ... 250 Allows exclusion of the evaporator fans to be selected or not during flag defrosting. n(0) = No (it depends on FCO); y(1) = Yes (fans excluded).
- Page 17 PAR. DESCRIPTION M.U. RANGE EZ-HT EZ-MT EZ-LT tdO Delay in door open alarm activation. 0 ... 250 tAO Time delay for temperature alarm indication. 0 ... 250 Alarm signalling end of defrost due to timeout. flag n(0) = Alarm not activated; y(1) = Alarm activated.
- Page 18 PAR. DESCRIPTION M.U. RANGE EZ-HT EZ-MT EZ-LT Display mode during defrost. 0 = Displays the temperature read by probe Pb1; 1 = Locks the reading at the temperature value read by probe Pb1 0/1/2 when defrosting starts and until the next time the SEt is reached;...
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Page 19: Liability And Residual Risks
DISCLAIMER This document is the exclusive property of ELIWELL CONTROLS SRL and may not be reproduced or circulated unless expressly authorised by ELIWELL CONTROLS SRL itself. Every care has been taken in preparing this document; nevertheless ELIWELL CONTROLS SRL cannot accept liability for any damage resulting from its use. - Page 20 T: +39 0437 986 300 E: Techsuppeliwell@schneider-electric.com Sales: T: +39 0437 986 100 (Italy) T: +39 0437 986 200 (other countries) cod. 9IS54509 • EZ-HT/EZ-MT/EZ-LT • EN • rel. 11/16 © Eliwell Controls s.r.l. 2016 • All rights reserved. E: saleseliwell@schneider-electric.com...
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