Bosch Worcester Greenstar Utility 32/50 Installation, Commissioning And Servicing Instruction Manual page 27

Fig. 36
230V STANDARD WIRING DIAGRAM
Brown
Brown
F
Brown
Grey
G
Red
K
Fig. 37
Key to components:
[A] Terminal connector block
[B] Earth connector
[C] Flue thermostat (manual reset)
[D] Heating thermostat (manual reset)
[E] Heating thermostat (automatic reset)
[F] Air pressure switch (manual reset)
[G] Control thermostat
[H] Burner socket
[J] Burner plug
[K] Burner control box
Greenstar Utility ErP - 6 720 821 751 (2018/04)
J
Green/Yellow
Blue
H
3 N E 2 1
J
3 N E 2 1
RIELLO CONTROL BOX
PRE-WIRED REMOTE 2 OR 3 PORT VALVE CONTROL SETS:
Fig. 38
Key to components:
[A] Double pole switched fused spur, positioned in the boiler room
next to the appliance.
[B] Remote junction box (10 way) to connect the following:
– Mains wiring 230V 50Hz.
– Hot water tank thermostat
– Room thermostat
– System water valves
– Circulating pump
– External programmer
[C] Appliance control box terminal connector block
Remote junction box [A] requirements
▶ This must be a terminal block type, current rated to at least 5 amps.
▶ A 5 amp fuse must be fitted to the mains supply.
▶ The junction box [A] must be fitted externally to the appliance.
A frost thermostat can also be connected to the remote junction box if
required.
Installation
27