Dungs MPA 4122 V2.0 Manual do utilizador - Página 8
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Imprimir página9. Assembly and electrical installation
The installation regulations applicable at the installation site must be observed.
•
The data specified on the rating plate must be observed to ensure safe operation
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Before opening the housing, switch off the power to the system and secure it against being switched back
on.
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Observe the maximum switching power of the outputs.
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Version MPA 4122: Voltage is also present in the housing when the power switch is switched off.
•
The switch in the MPA4122 housing is not an disconnector within the meaning of DIN EN 60730. That is,
even if the switch is deactivated, mains voltage is still present within the housing – risk of fatal electric
shocks! As a result, the power supply must be interrupted before opening the housing.
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Version MPA 4114: The connection to the AM 41 display may be established or disconnected only in a
voltage-free state.
For inductive loads, pay attention to the inrush current!
The cross-section of the connection lines must be observed.
The connection lines used must be suitable for an ambient temperature of at least 75 °C (167 °F).
A suitable high-voltage line must be provided for ignition and ionisation lines. Only use interference-suppressed
connector plugs for the ignition electrode (1 kOhm)
All components must be provided with a protective earth at the connection points intended for this purpose.
Only use suitable cable fittings – observe IP protection.
The MPA is supplied with continuous voltage; the heat requirement is not used for the power supply.
All protective conductor connections must be professionally executed; the MPA can be destroyed if they are not,
especially in single electrode operation.
In addition to the protective conductor connections on the MPA, also check the protective conductor connection
of the burner.
Ionisation flame monitoring is possible only in earthed networks.
An isolating transformer is required for non-earthed networks.
Max. cross-section of line: 2.5 mm² / PE 6 mm²
EMC-compliant version
The ignition line must be laid separately to the other current-carrying lines.
Do not route in metallic pipes or bundled with other lines.
Create all earth connections professionally and ensure low transition resistance.
Use interference-suppressed ignition plugs or suitable high-voltage lines with corresponding line resistance.
Installation of MPA 4122
4x screw M4, length min. 20 mm
The housing is not earthed using the mounting screws.
The protective earth must be provided
via the connection (screw M4 x 6).
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