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St9520C Internal Wiring; Wiring Diagrams - Honeywell Y9520Z Sundial RF2 Pack 5 Installation Instructions Manual

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1.5 ST9520C Internal Wiring

OFF
ON
Clock
N L 1 2 3 4
230V~
50...60Hz
N
3 AMPS MAX
Zone2
L
OFF
Zone1
OFF

1.6 Wiring Diagrams

95-1 Wireless room thermostat, wired valves, wired TPI boiler control
V4043H
2 PORT ZONE VALVE
ZONE 2
1
2
230V~
3 AMPS
50...60Hz
MAX
L
N
95-2 Wireless room thermostat, wired valves, OpenTherm 2 wire boiler control
V4043H
2 PORT ZONE VALVE
ZONE 2
1
2
230V~
3 AMPS
50...60Hz
MAX
L
N
OFF
ON
A B
Zone2
ON
OpenTherm low voltage
output to boiler.
Zone1
NOT MAINS
ON
V4043H
2 PORT ZONE VALVE
ZONE 1
3
4
5
6
7
8
9 10
N L 1 2 3 4
A B
ST9520C
*NOTE 2
V4043H
2 PORT ZONE VALVE
ZONE 1
3
4
5
6
7
8
9 10
N L 1 2 3 4
A B
ST9520C
*NOTE 2
Notes
1.
DT92E is completely wireless and so is not shown connected on
these wiring diagrams.
2.
The ST9520C is a Class II (double insulated) device. A parking
terminal is provided for earth wiring continuity, if required.
3.
The OpenTherm boiler connection (diagram 95-2) is a low voltage
polarity-free connection and is not for 230V~ mains voltages.
4.
The BDR91T Relay Box (diagrams 95-3) requires a permanent
230V~ supply.
PUMP
L
N
E
T1
L
N
E
BOILER
Additional notes
a.
Orange wires from zone valves are 'parked' for
convenience.
b.
Pump live is taken from boiler. If boiler does not
provide this output, connect live input to pump from
terminal 10
PUMP
L
N
E
PL
T1 T2
L
N
E
BOILER
4

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