Connection Details For Control Systems Utilising 2 X 2 Port Motorised Valves Via; External Wiring Box - Vaillant uniSTOR VIH GB 125 S Instructions For Installation And Use Manual

All internal wiring is factory mounted.
The thermostat which controls the DHW temperature (1,
fig. 10) is adjustable between 20 and 65 °C. The built in
safety thermal cut out operates at 90 °C. Should the
thermal cut out be brought into operation, the
motorized 2 port valve will be operated and shut the
primary flow to the cylinder. Press the reset button (2,
fig. 10) to reset thermal cut out and motorised valve.
Important:
Before resetting the thermal cutout or changing
the temperatur setting of the thermostat, set
the electrical supply off.
Connections to wiring box
•
Provide a wiring box adjacent to the cylinder to make
the electrical connections.
•
Connect the boiler terminals to the corresponding
terminals of the wiring box.
•
Connect the uniSTOR cylinder controls to the wiring
box as shown in figure 10.
5.4.5.3 Connection details for control systems utilising 2 x 2 port motorised valves via external
wiring box
Diagram only applies to the specific controls mentioned
3 amp fused
main supply
L N
L N
uniSTOR Cylinder
E
EARTH
Hot water 2 port motorised valve
Fig. 11 Connection details for control systems utilising 2 port motorised valve
uniSTOR GB
ecoTEC
terminal strip
E L N
L N

External wiring box

(Do not use pre-wired printed circuit board type)
N L
3
N L
7 10 E
1 2 3 E
5 10 3
BLUE BROWN GREY ORANGE
•
Connect the 2 port valve flying lead to the terminals
of the wiring box.
•
Connect the terminals of the programmer and room
thermostat to the terminals of the wiring box.
•
Connect a 3 amp fused mains supply to the terminals
of the wiring box.
Note:
All wiring must be carried out in accordance with
BS 7671: Requirements for electrical installations
(IEE Wiring Regulations, 16th edition).
•
Check that the sensors from the immersion heater
and the cylinder are positioned correctly in the tubes.
Note:
A special accessory is offered for the electrical
connections between the uniSTOR and an
ecoEURO appliance (No. 307 215).
Programmer
for programmer connections see fig. 16.d
3 4 5
3 4 5
4 5 6 7 8 9
not used
Room thermostat
Vaillant VRT 9090
ACL Drayton Digistat 2, 3, 4
ACL Drayton RTS 1, 2
Danfoss Randall RX-1
Danfoss Randall RMT 230
Danfoss Randall RET 230
Tower SS
Honeywell T6360
Horstmann HRT 1
Siemens-Landys & Staefa RAD 1
Sunvic TLX 2000 series
4
E 5
EARTH BLUE
Central heating 2 port motorised valve
Installation 5
CENTRAL HOT HOT
N L
HEATING WATER WATER
ON ON OFF
5 3 6 7 8
10
5 9 6 L N E
E C A
3 1
N 3 L
3 2 C B
4 2 1
N 3 L
4 2 1 E
2 3 1
4 2 1 E
2 1 E
4 1 3
E
9 3 4
BROWN GREY ORANGE
17