Robur K18 Hybrigas, Installation, Use And Maintenance Manual, Page: 35 / 60

Electrical installer
Installation, use and maintenance manual – K18 Hybrigas
35
4
Figure 4.1
Terminal block for electrical connections of K18 unit
1 Control system connection (see Paragraph 4.4
p. 35)
2 Modbus connection to RS485 port for optional monitoring
3 Outdoor temperature probe connection (Paragraph 4.7 p. 37)
4 GHP temperature sensor connection (see par. 4.7 p. 37)
5 Connection of 0-10 V signal on the internal water pump
6 Condensing boiler module connections
7 Supply connection on the internal water pump
8 Power supply connection (see Paragraph 4.3 p. 35)
9 Earth connections for signal cable shielding
K18 CONTROL CABLE
AUX
PROBE 2
AUX
PROBE 1
RS485
230V W. PUMP
N
L
ON/OFF
N
L
+10
0
T1
0
W. PUMP
+10
T1
COM
B
A
T2
T2
GND
0
AL
AL
+10
DHW
REQ
RES
+ AL
0 AL
AUX
BOILER
AUX
BOILER
AUX
BOILER
1
2
9
3
4
9
5
6
7
8
How to perform connections
All electrical connections must be performed in the connecting
terminal block located near the Electrical Panel:
1. Ensure the appliance is not live.
2. Remove the appliance's lower front panel (placed under the
fan).
3. Remove the cap of the hole for electrical connection (see ref-
erence C Figure 1.3 p. 10) and fit a suitable cable gland in
order to:
„
properly protect the cable insulation from abrasion;
„ properly protect cables against mechanical stresses on
the wiring terminals and liquid penetration (at least the
protection index IP 25 declared for the unit must be
guaranteed).
The unused holes for cables passage must remain cov-
ered by caps.
4. Insert cables through cable gland.
5. Identify the appropriate connection terminals.
6. Perform the connections.
7. Replace the lower front panel.
4.3 ELECTRICAL POWER SUPPLY
Power supply line
Provide (by the installer) a protected single phase line (230 V 1-N
50 Hz) with:
▶
1 three-pole cable type FG7(O)R 3Gx1.5;
▶
1 4 A magnetothermic breaker with differential protection.
The switches must also provide disconnector capability,
with min contact opening 4 mm.
How to connect the power supply
To connect the three-pole power supply cable (Figure
4.2 p. 35):
1. Access the connection terminal block according to Proce-
dure 4.2
p. 34.
2. Connect the three wires to terminal board (TER) as shown in
Figure 4.2 p. 35.
3. Provide the earth lead-in wire longer than live ones (last to
be torn in the event of accidental pulling).
Figure 4.2 Appliance power supply wiring diagram - Unit connection
to power supply network (230V 1N - 50 Hz)
L phase
N neutral
Components NOT SUPPLIED:
GS 4A magnetothermic breaker with differential protection
4.4
CONTROL SYSTEM
Control systems, options (1) (2) (3)
Three separate control systems are provided, each with specific
features, components and diagrams:
▶
System (1), with OQLT019 controller.
▶
System (2), with chronothermostat OCDS007.
▶
System (3), with an external request.
OQLT019 controller (optional)
(System (1) see also Paragraph 1.8 p. 21)