Modbus Connection - Dimplex ECS150HP40A-580 Installation And User Instructions Manual

5.9.2

Modbus Connection

Correct installation of the Modbus connections is
critical for communication between the heat
pump, UI and the cylinder. Figure 8illustrates
how these connections must be made. The
modbus wire must be specified to BELDEN 9842.
The maximum allowable network length is 100m.
 Modbus in connection comes from the heat
pump master controller.
 Modbus out connection goes to the user
interface.
5.9.3 Zone Connections
 For a dual zone system, i.e. DHW and
Central Heating, a pump and a three port
valve is required; these are included in the
scope of delivery of the heat pump hydraulic
pack.
 Where additional zones are required, the
installer must specify and source suitable
components. Figure 9, illustrates wiring of
each pump and/or zone valve for up to 4
zones.
Figure 8: Modbus Communication Connections
Installation
 The earth shield of the Modbus connection
must be connected to ground at both ends.
The Earth connector block or the cylinder
stat bracket can be used as a ground
connection.
 The Modbus cables can be fed inside the low
voltage trunking (LHR) under the metal hood
and clamped to the strain relief bar, using
the supplied cable ties.
Note: The earth shield in the cable from the
heat pump to the
terminated at the cylinder.
Note: The water module PCB is only capable
of switching valves
circumstances should
switched, as irreparable damage will be
caused that will void the warranty.
cylinder is only
and under no
ERP pumps be