Robur K18 Simplygas, Installation, Use And Maintenance Manual

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Electrical installer
30
4
force.
„ It is forbidden to use gas pipes as earthing.
Cable segregation
Keep power cables physically separate from signal ones.
Do not use the power supply switch to turn the ap-
pliance on/off
„ Never use the external isolation switch (GS) to turn the
appliance on and off, since it may be damaged in the
long run (occasional blackouts are tolerated).
„
To turn the appliance on and off, exclusively use the suit-
ably provided control device.
4.2 ELECTRICAL SYSTEMS
Electrical connections provide:
A. Power supply (Paragraph 4.3 p. 31).
B. Space heating control system (Paragraph 4.4 p. 31).
C. DHW production control system (Paragraph 4.4.2 p. 32).
D. Diverter valve for DHW production (Paragraph 4.5 p. 32).
E. Alarm indicator lamp (if there is no optional system control-
ler, Paragraph 4.6
p. 33).
F. Unit error reset remote (if there is no optional system con-
troller, Paragraph 4.7 p. 34).
G. Temperature probes (if there is no system controller:
Paragraph 4.8 p. 34; if there is a system controller: installa-
tion manual of the system controller).
H. Auxiliary boiler (if present, Paragraph 4.9 p. 35).
I. Optional OKBT015 winter kit (Paragraph 4.10 p. 36).
Figure 4.1
Terminal block for electrical connections of K18 unit
1 Control system connection (see Paragraph 4.4 p. 31)
2 Modbus connection to RS485 port for optional monitoring
3 GHP'' or EXT.T temperature probe connection (see Paragraph 4.8 p. 34)
4 GHP' or EXT.T temperature probe connection (see Paragraph 4.8 p. 34)
5 GHP temperature sensor connection (see Paragraph 4.8 p. 34)
6 Connections of optional auxiliary boiler (see Paragraph 4.9 p. 35)
7 Possible connection of three-way diverter valve for DHW (see Paragraph
4.5
p. 32)
8 Power supply connection (see Paragraph 4.3 p. 31)
9 Earth connections for signal cable shielding
K18 CONTROL
CABLE
RS485 - 1
ON/OFF
+10
0
0
W
. PUMP +10
COM
B
A
GND
0
AL
AL
+10
DHW
REQ
RES
+AL
0AL
N
L
230V
DHW V
AL
VE
N
L
230V
W
. PUMP
AUX
PROBE 3
T3
B
A
GND
CTRL
AUX
PROBE 2
AUX
PROBE 1
AUX
BOILER
T3
T2
T2
T1
T1
AUX
BOILER
AUX
BOILER
RS485 - 2
N
L
1
2
2
3
4
5
6
7
8
9
9
9
How to make connections
All electrical connections must be made in the connection ter-
minal 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