Technical data

Installation, user and maintenance manual – GAHP-A
49
You will need: the appliance disconnected from the electricity supply
Remove the DDC's back panel by undoing the 4 bolts securing it.1.
Cut a suitable length of power cord (minimum 2x0.75 mm2.
2
).
Pass the power cord (DDC side) through the hole in the DDC's cover and hook up 3.
as shown in the example, with the following polarities: terminal 1 = 24 V; terminal
2 = 0 V; terminal 3 = ground.
Make the grounding connection on the transformer terminal connected to termi-
nal 2 of the 4-pole connector (EP) of the DDC. Terminal 2 is connected internally to
terminal 3, and is thus grounded; if the transformer already has one wire grounded,
it must be connected to this terminal. Terminal 3 of the DDC’s 4 pole connector
must always be grounded (r ≤ 0.1Ω).
On completion, close the DDC's back panel with the 4 bolts.4.
The DDC is equipped with a backup battery which retains the memory settings in case
of power failure. The backup battery lasts approximately 7 years, after which time it
must be replaced by an authorised Robur Technical Assistance Centre.
Figure 5.11 – DDC - electric supply
DDC electric supply from external transformer
LEGEND
DDC Direct Digital Control
AL
supply 4 poles connector
1 clamp and wire for 24 Vac supply
2 clamp and wire for 0 Vac supply
3
clamp and wire for ground contact
(required connection)
DDCTR safety transformer
- (230/24 Vac 50/60 Hz)
The following wiring diagrams show the connection of the DDC to 1 appliance (Figure
5.12 Connexion câble CAN BUS for plants with one unit → 50) and 2 appliances (Figure
5.13 Connexion câble CAN BUS for plants with more unit → 51) respectively.