17 GLOSSARY
Multiple inputs with an OR relationship to one another are equivalent to a single input with the following status:
• active, if at least one input is active;
• Inactive if no input is active
To “Scroll up” a menu means listing the various parameters from the bottom up (Pa08 -> Pa 09 -> Pa 10 ….)
Indicates that the instrument is waiting, in stand-by mode; all functions are suspended.
Set to zero.
Resetting an alarm means reactivating it ready for a new signal.
A manual reset alarm must be reset using the keyboard.
To "Scroll up" in a menu is to list parameters from the top down (Pa10 -> Pa 09 -> Pa 08 ....).
Means flashing; normally refers to leds
Average number of hours is the ratio between the total number of hours for which the compressors are available and the
number of compressors in the circuit
Devices in the system, including compressors, fans, hydraulic pump, electrical anti-freeze heaters…
A reference value (set by the user) defining the system’s operating status, such as the thermostat that controls
temperature in the home: if we want to maintain a temperature of 20 °C we set the set point to 20°C (the heating system
will come on if the temperature in the house falls below 20°C, and go off if it exceeds this value).
Values falling within a given interval; Range 1…100 indicates all values between 1 and 100
A hysteresis is normally defined around a set point to prevent frequent oscillation of the change of status of the load being
controlled;
Example: suppose we have a set point of 20 °C on a probe for measurement of room temperature, above which a
compressor will be started up;
When room temperature nears the set point (20 °C) there will be an unstable phase during which the relay which starts up
the compressor will frequently switch from ON to OFF and vice versa, which could result in serious damage to the system.
To prevent this problem a hysteresis is defined: an interval of tolerance within which there will be no change in status; in
our example, we could set a hysteresis of 1 °C, in which case the compressor would be started up at 21 °C (set point +
hysteresis) and turned off at 19 °C (set point – hysteresis)
Memory in which data is maintained even when the device is turned off (as distinct from temporary memory, the data in
which is lost when the device is turned off.)
It is the change of the operating mode (for example: from Cooling to
heating).
The structure of the label shown on an internal face of the device is illustrated below:
The various entries indicated are :
• BRAND : producer’s brand
• PRODUCT NAME : name of product
• PRODUCT CODE : asset number of product
• CUSTOMER REF. : customer ID
• POWER SUPPLY : device power supply
• FIRMWARE : software version
• DESTINATION : device’s usage destination
• CERTIFICATE : product’s certification
18 APPENDIX
Name Code Description
Ech 210 BD
MW320212
Machines management heat pump 1 step or only chiller 2 steps
maximum:
• power supply 12V~ 50/60Hz;
• probe input. NTC or 4…20mA configurable condensation
input;
• plastic container 32x74 mm ;
Logical OR
Scroll up
Stand-by
Reset
Reset alarm
Manual reset
Scroll down
BLIN
Average number
of hours
Loads
Set Point
Range
Hysteresis
Permanent
memory
Cut-of
Label
PRODUCT NAME
PRODUCT CODE
FIRMWARE
CERTIFICATE
POWER SUPPLY
CUSTOMER REF.
DESTINATION
BRAND
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