Radiant RS 20 E Installation And Maintenance Manual - page 12
Installation Manual
SYSTEM BOILER – Cod. 99951NA – November 2002
9
VT
1
2
BLACK
BLACK
BROWN
LIGHT BLUE
YELLOW/GREEN
BLACK
BROWN
YELLOW/GREEN
LIGHT BLUE
TA
TA
5
TA
L
N
OR
N
L
OR
1
2
3
4
5
4 3
2 1
M
M
TA
PT
TA
OR
L
N
N
L
OR
TA
PT
PT
re
d
ye
llo
w
bl
ue
br
ow
n
re
d
ye
llo
w
bl
ue
br
ow
n
SHUKO
PLUG
MAINS
NOT
APPLICABLE
FOR U.K.
ELECTRICAL CONNECTIONS
The boiler works with 230 V 50 Hz AC cu
rrent
and has maximum input of 150 W. Connection to
the electrical mains must be performed with a
device having an omnipolar opening of at least 3
mm. Make sure the live and neutral connections
conform to the diagram. A secure earth
connection is compulsory.
IMPORTANT
If you need to replace the power supply cable,
use cable having the same characteristics: (HO5
W-F) 3x1.5 with maximum external diameter 9
mm.). Connect to the terminal block located in the
instrument panel as follows:
A. Turn off the electrical power supply at the
mains.
B. Remove the boiler front casing.
C. Undo the two side screws on the panel using
the phillips screwdriver VT and turn it to the
position shown in fig.1 (pos. 1).
D. After pulling the panel downwards, undo the
four rear screws on the housing and open the
electrical control box by lifting the cover as
shown in fig.1.
E. With the electrical control box now open
make the following connections:
• Connect the yellow/green wire to the terminal
marked with the earth symbol “ “ (see
fig.1).
• Connect the blue wire to the terminal marked
with the letter “N”.
• Connect the brown wire to the terminal
marked with the letter “L”.
CONNECTION OF ROOM THERMOSTAT
NOTE: use low voltage room thermostats only.
The thermostat wire must not be placed in the
channel containing high tension wires, but must
have its own line
The room thermostat lead must not exceed 50m
n length; minimum section 0.5 mm.
Connection: after carrying out the operations
described on page 15, proceed as follows:
A. Insert the room thermostat lead into the
entry point on the electrical control box
along with all the other leads on the boiler.
B. Move the bridge PT (see fig.1) from
terminal TA to the free one next to it.
C. Insert the thermostat wires (fig.2) one in
terminal TA and the other in the one next to
it occupied by bridge PT which you have just moved.
If a timer is fitted as well as a room thermostat, carry out the electrical connections for the timer according to the indications in figures 3 (tipe
clock + room thermostat) and 4 (time clock only).
Fig. 1
Fig. 5
Fig. 4
Fig. 2
Fig. 7
Fig. 6
Fig. 3