Elstat EMS-55 Betriebsanleitung
2
INDEX
Contents Page
General description of the EMS 3
Installation instructions 4-5
Locating the appliance and condenser sensors 6-7
Self learning module 8-9
Relearning and resets 10
Soft start 11
Minimum compressor rest time 11-12
Automatic defrost management 12
Voltage management 12-13
Managing the internal fans 13
Door open alarm 13
Diagnostics 14
Uninterrupted pull down function 14
Button commands 15
Display 16-17
Control settings 18-20
Statistical scroll 21-22
Products in the EMS range 23
Technical information 24
Contact information 25
Supplement 26
3
EMS-55-(R) Instruction Manual
GENERAL DESCRIPTION
The EMS (Energy Management System) saves energy by allowing the temperature in the cooler to
rise during periods when the outlet is closed. The unit is totally self managing and does not require
any interference of the user. It can substantially reduce the number of service calls whilst saving on
average 38% energy.
To ensure that the product is at the correct temperature, the EMS will switch to operational mode 2
hours before the outlet opens (this timing is adjustable). Subsequently the control will switch to
standby mode 1 hour after the outlet closes (again this timing is adjustable).
Fig. 1
Figure 1 shows a typical temperature graph. During stand-by period the temperature inside the appliance will rise to a higher
(standby) level and the lights will be switched off.
4
INSTALLATION INSTRUCTIONS
The EMS can be mounted either horizontally or vertically however, it is necessary when installing the
EMS or RMD55 to ensure that the motion detection window has a clear and unrestricted view into the
area in front of the cabinet.
CONNECTIONS
All line voltage connections are made via 6.5 mm spade terminals and all low voltage connections are
made via screw terminal blocks. When installing the EMS it is recommended to use insulated
connectors for all line voltage connections.
5
WIRING DIAGRAM
In addition to the above wiring diagram, a door switch should also be wired into the system. This
connection must go directly from the door switch to the terminals on the EMS (see printed label on the
control housing).
If a door switch is not used (not recommended) then a wire loop must be fitted to the door switch
terminals on the EMS (see below).
6
LOCATING THE APPLIANCE SENSOR IN THE RETURN AIR
The most reliable and most accurate representation of the liquid temperature inside the appliance is
the return air temperature. The air coming from the evaporator is, in the average cooler, between
approximately -8 / -12 OC. This air is then distributed over the load of the appliance and therefore
adopts the average temperature of the product it has been in contact with. By the time the air is
returned to the evaporator it is an accurate representation of the (average) liquid temperature inside
the cooler. It is for this reason that the EMS appliance sensor should be located in the return air.
LOCATING THE CONDENSER SENSOR
The EMS has a second temperature sensor for the discharge line, which is used to avoid the
refrigeration system overheating. The compressor manufacturer will usually quote a maximum
operating temperature measured at the top of the dome or on the discharge line 100mm away from
the compressor. It is advised to locate the sensor on the discharge line.
7
To ensure more accurate sensing of the discharge line temperature it is advisable to cover both
sensor and discharge line with an insulation material.
THE FASCIA MEMBRANE
The membrane cannot be removed from the control fascia, if attempted to do so, the membrane will
be permanently damaged and cannot be re-used.
Membranes are available as spare-parts if so required, to order, contact the manufacturer of the
control direct.
OPENING THE CONTROL
The EMS is ultrasonically welded together during its manufacture and thus any attempt to open the
control will result in damage that cannot be rectified.
8
THE SELF LEARNING MODULE
The EMS is capable of learning the opening and closing times of the outlet where the appliance is
located. During opening hours the control will switch the appliance to operational mode and during
closing times the control will automatically switch the appliance to stand-by mode.
To achieve this each day is divided into 48 thirty minute periods and each period is represented by a
single location in the EMS memory. Initially all the memory locations are set to zero (closed period)
and are changed to a one (open period), if sufficient passers by or door openings are registered.
When first installed, the cooler will run in operational mode for the first 48 hours (if the parameter
AF=3). During this period the EMS will monitor the traffic in the vicinity of the cooler and will calculate
its density to be high, medium or low. This is based upon the average number of motion counts and
cooler door openings per day over the 48 hour period.
Category
Number of passers by
registered per 24 hours
Number of door openings
registered per 24 hours
Low traffic (0)
< 45
< 15
Medium traffic (1)
> 45
> 15
High traffic (2)
> 90
> 30
The EMS will then set the AF parameter automatically to one of the following:
High traffic density setting (AF=2) will require 6 passers by or 2 door openings to register an
active period
Medium traffic density setting (AF=1) will require 3 passers by or 1 door opening to register
an active period
Low traffic density setting (AF=0) will require 1 passer by or 1 door opening to register an
active period
After this initial period the control will start to learn the opening pattern of the outlet. For the next 24
hours (or if AF<3) the control will remain in operational mode. After this period and for the next six
days it will act upon the pattern learnt during this 24 hours and will go into its standby mode during
periods of inactivity (outlet closed periods). Once the first week has passed the EMS will implement
the learnt pattern for each individual day whilst verifying that the data for that day is accurate. At the
end of the second week the control will finish learning and will act upon the established activity
pattern.
If the power to the EMS is lost, for whatever reason, then the matrix will remain in the memory for 3
days after this period the matrix will be lost. Once power is restored the EMS will relearn (see below).
To ensure that its firmware is suitable for all global time zones, the EMS is not subjected to “real time”
but is operates purely upon days, hours, minutes and seconds.
Components used to detect activity
For door openings
To detect door openings the EMS has an input for a door switch. This door switch must be a normally
open type and as the contact is a dry (no current is involved) a switch with gold contacts or
alternatively, a reed switch, may be used. Under no circumstances should the door switch be used to
switch any load.
9
For passers by
To detect passers by a passive infra-red motion detector is used. This must be positioned so that it
has an unrestricted view out of the front of the cooler. For the detector to function correctly it must not
be placed behind glass.
The EMS55 has a motion detector integrated into the fascia of the control and the EMS-55-R has a
connection for an external detector (RMD-55).
EMS-55 with integrated motion detector
EMS-55-R with external motion detector (RMD-55)
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RE-LEARNING
If the outlet’s business times change or the learnt pattern is incorrect then the EMS will automatically
relearn. Under these circumstances the original pattern will be erased and the learning process will
begin again from day 1. Please note that the activity frequency will not be recalculated during a
relearn. For a relearn to occur the EMS must detect movement or the door being opened during a
stand by period. (The EMS can only relearn if it has finished learning).
ERASING THE EMS MEMORY
Half factory reset
If required, the learnt pattern can manually be erased by the using the following procedure:
Defrostbutton used to
erase the matrix
Disconnect the power to the control (unplug the cooler), push and hold the defrost button and restore
the power. Keep the button pressed until the display shows the temperature again, release the button
and the matrix will be erased. The control will then start to relearn. (During this procedure there will be
a short period when the display is blank)
Full factory reset
A full factory reset will erase the matrix, reset all parameters to the default and reset all the statistics
including the compressor running hours.
Dieses Handbuch passt für folgende Modelle
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