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3.14 CONNECTION BETWEEN 2 DIM ERP WITH HYDRAULICS IN PARALLEL.
DIM ERP TO BOILER BUS CONNECTION WIRING DIAGRAM.
If the boiler requires it, the BUS connection can be made to the terminals indicated as DIM BUS or 44-41, or 40-41 (see boiler
instruction booklet).
Eliminate jumper X40 on the boiler terminal board (see boiler instruction booklet).
If the first DIM ERP is connected to the boiler via DIM BUS and a second one is to be connected in parallel, connect the central
heating request of the second DIM to the first one using input X11.
The first DIM ERP can receive the external probe value from the boiler.
The mixed zone flow temperatures of the first DIM ERP will be set on Superior series boilers connected via DIM BUS, or on DIM
ERP zones control unit trimmers when the same is connected to boilers different to Superior.
The second DIM ERP receives only the zone signal state from the first DIM ERP and it must be connected to its own external
probe (if required), the relative mixed zone flow temperatures of the second DIM ERP must be adjusted on its trimmers.
Key:
1 - 1
st
DIM ERP zones control unit
2 - 2
nd
DIM ERP zones control unit
3 - DIM BUS connection to boiler
4 - External probe (optional)