Internal connections and switches
12
Multitronic-Retrofit Kit_01_2004-06-16
Risk of injury from live parts!
After connection to the power mains, the terminal bars, electrical supply
cables and external lines are live and may cause serious injury if
touched!
Therefore, first connect all wires of the valve control system and
complete all necessary modifications and settings to the unit; only then
connect the system to the power supply line.
Prior to carrying out any work at electrical components, disconnect the
power supply line and any additional external supply cables!
Valve control connections
In 3-valve models with normally closed main valves
►
Connect solenoid valves Y1–Y2 to terminal bars X1–X2.
►
Bridge terminal bars X3 and X4.
►
Connect solenoid valve Y3 to X3.
In 4-valve models with normally closed main valves
►
Connect solenoid valves Y1–Y4 to terminal bars X1–X4.
In 4-valve models with normally open main valves
During the processing of breathing air, the main valves of the dryer are normally
open, i.e. air can circulate.
►
Connect solenoid valve Y1 to X2 and valve Y2 to X1; connect blow-off valve
Y3 to X3 and valve Y4 to X4.
In 5-valve models
The pressure build-up valve Y5 is wired via X5.
►
Connect solenoid valves Y1–Y5 to terminal bars X1–X5.
Connection of synchronised compressor operation – X8
Terminal bar X8 with terminals 1 and 2 is used as the input contact.
►
Connect the signal line of potential-free busbar of the compressor.
For operation without compressor synchronisation, bridge terminals 1 and 2.