GEA Bock HGZ Series - Electronic Trigger Unit Mp; Connecting Of The Trigger Unit Mp

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6| Electrical connection
6.4 Electronic trigger unit MP 10
The compressor motor is tted with cold conductor temperature sensors (PTC) connected to the
electronictriggerunitMP10intheterminalbox.ReadinesstooperateissignalledbytheH3LED
(green)afterthepowersupplyisapplied.Inthecaseofexcesstemperatureinthemotorwinding,the
unitswitchesoffthecompressorandtheH1LEDlightsred.
Thehotgassideofthecompressorcanalsobeprotectedagainstovertemperatureusingathermal
protectionthermostat(accessory).TheH2LED(red)isprovidedfortheprotectionfunction.
The unit trips when an overload or inadmissible operating conditions occur. Find and remedy
the cause.
INFO! The device has a reclosure preventing feature. After eliminating the
fault, the device is quit by interrupting the mainspower with the
externalalarmresetswitchS1(seemain-linewiringdiagram,chap-
ter5.3).ThereclosurepreventingfeatureisunlockedandLEDsH1or
H2 go off again.
Terminalbox
Fig.29
ATTENTION!
Terminals 1 - 6 on the trigger
unit MP 10 and terminals PTC
1 and PTC 2 on the compres-
sor terminal board must not
come into contact with mains
voltage. This would destroy the
trigger unit and PTC sensors.
The supply voltage at L1-N
(+/-forDC24Vversion)must
be identical to the voltage at
terminals11,12,14and43.
6.5 Connection of the trigger unit MP 10
INFO! Connect the trigger unit MP10 in accordance with the circuit
diagram. Protect the trigger unit with a delayed-action fuse (F) of
max.4A.Inordertoguaranteetheprotectionfunction,installthe
triggerunitastherstelementinthecontrolpowercircuit.
Temperaturemonitoringconnections:
Motorwinding: Terminals 1 - 2
Thermalprotectionthermostat: Terminals 3 - 4
Restartprevention: Terminals 5 - 6