Robur GAHP Line AR Series, Installation, Use And Maintenance Manual

Page: 68 / 100

GAHP-AR – Installation, start-up, use and maintenance manual
64
Edition: 2014-08
2. Prepare the orange CAN bus connector, from the supplied sleeve.
3. Cut a length of cable, long enough to allow it to be installed without kinking.
4. Having chosen one end of the length of cable, remove the sheath from a length of
approximately 3’, taking care not to cut the wires contained inside, the shielding
(metallic shield or aluminium sheet) and, if present, the bare connector in contact with
the shield and the wires contained within.
5. Roll the shielding and connect it to a 4-mm eyelet terminal as illustrated in Figure 27
on page 62, points C and D. Then, proceed as follows.
6. Connect the three colored wires of the cable to the orange connector, following the
diagram in Figure 29, page 63.
Respect the correct indications L, H, GND provided in Table 20 on page 59, in Figure
29 and on the DDC board at the base of the connector.
- If the DDC is an
intermediate node of the network (see Figure 23, page 58): carry
out also point 7;
- If the DDC is a terminal node the network (see Figure 23, page 58), do not carry
out point 7 and proceed directly to point 8.
7. For intermediate nodes only : repeat the operations from point 1 to point 4 for the
other length of CAN bus cable necessary. Follow also point 5, but refer to Figure 28,
page 63 instead of Figure 29 for the connection of the cable to the connector. Then
proceed to point 8.
8. Insert the orange connector with the wires first into the opening in the cover of the
DDC, then into the specific socket of the DDC, taking care to insert it correctly.
9. Use the fixing screw of the rear cover, located near the CAN bus socket, to fix the
4-mm eyelet (or 2 eyelets for intermediate nodes, see detail D, Figure 27 on page 62).
Connecting the DDC to the power supply
The DDC requires a low voltage power supply (24 V) with a 230/24 V a.c., 60Hz
safety transformer; the minimum power necessary is 20 VA.
For the connection use a cable with the minimum specifications 2 x 18 AWG.
Connect the DDC to the transformer via the 4-pole connector provide for this, following the
diagram in Figure 27 on page 62. With the DDC cover opened (unscrew the 4 screws to
remove cover), pass the cable through the opening in the cover before fixing the wires to
the connector.
As in Figure 27, the connections to the terminals of the 4-pole connector are:
- TERMINAL 1: 24 V
- TERMINAL 2: 0 V (NOTE: connected internally to terminal 3, therefore
grounded. If the transformer used already has a wire
connected to ground, it must absolutely be connected
to this terminal)
- TERMINAL 3: GROUND: connect to a safety ground socket, r ≤ 0,1 Ω
- TERMINAL 4: Not used