Protector 6 Instructions

MPA2A Alarm

Instructions for use

Note: The internal battery link between terminals 6 & 7 has been removed for shipping.

This link must be remade for the unit to operate.

Connections:-

240V ac Supply Terminal 1 (Live)

Terminal 2 (Neutral)

Terminal 3 (Earth)

Battery Link Terminal 6 & 7

Alarm Relay Terminal 8 (Common)

Terminal 9 (N/C)

Terminal 10 (N/O)

Note: The relay is fail safe hence N/C contacts

are closed when unit is in alarm condition

Buzzer Terminal 11 +

Terminal 12 –

Defrost Switch Terminal 13 & 14 (Note Closed cct = Defrost)

Door Switch Terminal 15 & 14 (Note Closed cct = Alarm) (Factory selectable)

PT1000 sensor Terminal 23 Red (GND)

Terminal 24 White

Alarm Parameters

Mute Delay

Set in minutes 0 – 99, this is the period that the buzzer will be muted for if the ‘‘mute’’ button is pressed following an alarm. If the alarm is still present on time out of the mute period then the buzzer will re-sound.

If an additional alarm occures during the mute period then the buzzer will re-sound.

Door Alarm Delay

Set in minutes 0 – 99, during this period the LED indicator will flash. On time out of the door delay period the LED will light solid, the buzzer will sound and the alarm relay contacts N/C will close.

Power Delay

Factory set to 0. This parameter is for special options and should not be altered without reference to the manufacturers.

Defrost Delay

Set in minutes 0 – 99, whenever the defrost contacts are closed all temperature alarms are ignored. The door and power fail alarms are stil active. When the defrost is complete and the contact opens the defrost delay period starts. Again during this period all temperature alarms are ignored.

Offset

Factory set to 0. This parameter is for special options and should not be altered without reference to the manufacturers.

Scale

Factory set to 0. This parameter is for special options and should not be altered without reference to the manufacturers.

Length

Factory set to 0. This parameter is for special options and should not be altered without reference to the manufacturers.

Hi Temp Alarm

Set in degrees C –99/+99

Lo Temp Alarm

Set in degrees C –99/+99

Hi Temp Alarm Delay

Set in minutes 0 – 99, during this period the LED indicator will flash. On time out of the Hi Temp Alarm Delay the LED will light solid, the buzzer will sound and the alarm relay contacts N/C will close.

Lo Temp Alarm Delay

Set in minutes 0 – 99, during this period the LED indicator will flash. On time out of the Lo Temp Alarm Delay the LED will light solid, the buzzer will sound and the alarm relay contacts N/C will close.

NOTE. Where used the alarm delay function should not be set to less than 5 minuites.

i.e set to 0 (default) or >5 mins

Operator Settings

The alarm parameters are found in the settings menu.

This is accessed by pressing and holding the adj & ‘mute’ buttons together and then pressing the ‘res’ button. The alarm parameters can be scrolled through using the hi and lo buttons. When the desired parameter is displayed the adj button can be pressed to input a new value. This is done using the hi and lo buttons.

On completion the ‘set’ button must be pressed to store the set values.

Note: The display will revert to normal after 30 seconds. If a change has been made but the ‘set’ button has not been pressed then the new value will not be stored.

Alarm Test

During normal operation pressing the ‘res’ button will provide a 3 second display, buzzer and LED test. This does not alter the alarm relay contacts.

Battery Back-up

The internal battery will provide a minimum of 2 hours battery backup following a power failure. This can be extended by connecting external batteries.

Please contact the manufacturer for details.

Instrument Mounting

The MPA-2a is a panel mounted unit and can be secured with the two panel clips located at the top and bottom of the unit. Turning them clockwise will tighten them and anti-clockwise will release them.(See below)