4
D33351 - RTL 120/520 Eng.
24.06.15 AM
We reserve the right to make changes without notice
6. WIRING DIAGRAMS
6.
1
RTL 120 built-in zone unit
7. SITING DEVICES
7.
1
Controller
The controller must be sited in a dry space which meets the ambient conditions described above.
7.
2
Unit with internal room sensor
In this instance the room sensor is internal; the device has to be installed in a position where it can monitor the true
room temperature of the space in question.
It must be sited far away from sources of heat such as: windows, radiators and chimneys so that the room tempe-
rature can be measured without thermal disturbances.
7.
3
Unit with remote (separate) room sensor
In this instance the room sensor is external to the device.
The room sensor must be installed in a place representing the true room temperature (see section 7.2); whilst
the device itself can be installed where it is most convenient, since it is not the device itself which measures the
ambient temperature.
8. ELECTRICAL CONNECTIONS
• Wire in accordance with the diagram and in respect of applicable regulations, using the following cable types:
– 1.5 mm
2
for the relay control outputs.
– 1 mm
2
for sensors and for the auxiliary service switches.
– 1 mm
2
for the P-Loc and power supply; for complex sites see Master MRL 608 C1 Technical Data Sheet,
sections 11, 12 and 13.
It is advisable not to insert more than two cables in a single terminal of the controller and, if necessary, to use ex-
ternal terminals.
B1
– Remote room sensor (if used)
E1
– First AUXILIARY SERVICE switch or
SEASON SWITCHING
E2
– Second AUXILIARY SERVICE switch
E3
– Third AUXILIARY SERVICE switch
G
– Power supply (13 Volt–)
P–
– Cold pole of P-Loc
0 Volt of the Y 0...10Volt output
P+
– Hot pole of the P-Loc
Y
– 0...10 Volt output
1,2,3
– Control output relay switches
The local unit REQUESTS heat (HEAT) or Cold (COND)
1, 2 = SWITCH CLOSED
2, 3 = SWITCH OPEN
The local unit DOES NOT REQUEST heat (HEAT) or cold (COND)
1, 2 = SWITCH OPEN
2, 3 = SWITCH CLOSED
WARNING: THE SWITCHES ARE SHOWN IN THE POSITION IN WHICH THE UNIT REQUESTS
HEAT (HEATING), OR COLD (CONDITIONING)
6.
2
RTL 520 wall-mounted zone unit
M
– All input 0 Volt
B1
– Remote room sensor (if used)
E1
– First AUXILIARY SERVICE switch or
SEASON SWITCHING
E2
– Secondo AUXILIARY SERVICE switch
E3
– Third AUXILIARY SERVICE switch
G
– Power supply (13 Volt–)
P–
– Cold pole of P-Loc
0 Volt of the Y 0...10Volt output.
P+
– Hot pole of the P-Loc
Y
– 0...10 Volt output
1,2,3
– Control output relay switches
The local unit REQUESTS heat (HEAT) or cold (COND)
1, 2 = SWITCH CLOSED
2, 3 = SWITCH OPEN
The local unit DOES NOT REQUEST heat (HEAT) or cold (COND)
1, 2 = SWITCH OPEN
2, 3 = SWITCH CLOSED
WARNING: THE SWITCHES ARE SHOWN IN THE POSITION IN WHICH THE UNIT REQUESTS
HEAT (HEATING), OR COLD (CONDITIONING)
1 2 3
B1 E1E2 E3
G
P– P+ Y
M
T
B1
E1 E2 E3
Contatti Comando Riscaldamento/Condizionamento
and Power supply
LOC
P
Y
0...10 Volt
t˚
COSTER
RTL 120
P+ = P-LOC BUS
P- / Y = 0...10 V DC OUTPUT
P- = 0V POWER SUPPLY AND P-LOC BUS
G =
DC POWER SUPPLY
P- / E1,E2,E3 = AUXILIARY INPUTS
P- / B1 = REMOTE SENSOR
1 2 3
B1E1 E2 E3
G P
P+
Y
t˚
SCREW
M / B1 = REMOTE SENSOR
M / E1,E2,E3 = AUXILIARY INPUTS
M / Y = 0....10V DC
OUTPUT
P- = BUS P-LOC
COSTER
P+ = BUS P-LOC
RTL 520
G =
DC POWER SUPPLY.
E3
P+ Y
E2
P
B1 E1
M
G
2 3
1
Power from
ALC 318 or ALP 418