Bosch WORCESTER GREENSTAR WIRING CENTRE, Installation, Commissioning & Servicing Instructions

Page: 11 / 16

INSTALLATION
6 720 804 107 (2012/10) 11
THREE CENTRAL HEATING CIRCUITS ONLY WITHOUT ELECTRONIC MIXING VALVES:
Fig. 22 Three central heating circuits without electronic mixing valves
Earth conductor
L Phase (230 V AC)
N Neutral conductor
Switches:
I Code switch I – system type
II Temperature switch II – domestic hot water cylinder
temperature
Terminal identification:
230 V AC Mains voltage
BUS
BUS EMS plus
IZ1...3 Room thermostat ( I nput Z one;

: Temperature/temperature
sensor)
IZ4 No function
MD1 No function
OS1 No function
PZ1...3 Circulating pump ( P ump Z one)
T0 Flow temperature sensor to the low-loss header ( T emperature
sensor); optional
T1 No function
TC1 No function
System component:
230 V AC Mains voltage
BUS
BUS EMS plus (connection between the Greenstar Wiring
Centre and boiler)
GWC Greenstar Wiring Centre
PZ1...6 Circulating pump in each heating circuit ( P ump Z one);
allocation of heating circuits 1, 2 and 3 or 4, 5 and 6 according
to coding (

chapter 4, page 13)
T0 Flow temperature sensor at low-loss header ( T emperature
sensor); optional
TZ1...6 Room thermostat ( T hermostat room temperature Z one;

:
Temperature/temperature sensor); allocation of heating
circuits 1, 2 and 3 or 4, 5 and 6 according to coding
(

chapter 4, page 13)
*) The marked system components are connected to the module
with coding 3 (coding

chapter 4, page 13).
1) Each of the thermostats TZ1...6 must be of a “programmable
room thermostat” type and compatible with 230 V AC operation.
Observe the coding of the modules (

chapter 4, page 13).
T0
GWC
PZ1
PZ4*
PZ2
PZ5*
PZ3
PZ6*
TZ1
TZ4* TZ2
TZ5* TZ3
TZ6*
1) 1) 1)
1) 1) 1)
6 720 804 107-20.1O
1 2 1 2 1 2
TC1 T0 BUS BUS
1 2
BUS
1 2 3 1
OS1
2 1 2
MD1
1 2
T1
≤ 24 V
N L N L N IN L IN L IN L IN L
120/230VAC 120/230VAC
IZ1 IZ2 IZ3 IZ4
120/230 V AC
N N 43 N 14 14
PZ2 PZ3 PZ1
120/230 V AC
230 V AC 230 V AC
L N L N
BUS T0
M
PZ1
PZ4*
N L
L N
N
M
PZ2
PZ5*
N L
L
M
PZ3
PZ6*
N L
L N
TZ1
TZ4*
N L S
TZ2
TZ5*
L S
TZ3
TZ6*
L S
I II II
0
1
2
3
4
S
Y off off
40 40
50 50 60 60
70 70
max max