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INSTALLATION
1
2
1.
Fig. 39 Removing the installer access cover
1
Low voltage connections
2
Mains voltage connections
3
Fuse carrier - 5A
Low voltage connections
EMS
1
2
3
Fig. 40 Low voltage connectors
Low voltage terminal strip
1
Low voltage room thermostat input (Not used)
2
EMS bus connections
3
External cut off switch (Not used)
4
Outdoor compensation sensor
5
Cylinder sensor
6
Low Loss Header sensor (Not used)
Table 21 Key to figure 40
30
3
4
5
6
Mains voltage connections
*
*
230V
FR FS LR LR
OUT
N
N
L
7
8
9
10
Fig. 41 Mains voltage connectors
Mains voltage terminal strip
7
External frost thermostat
8
230 V A.C. switched live inputs
• CH - External controls switch live connection point.
• DHW - Inactive unless optional integral diverter valve fitted.
9
230 V A.C. mains output to wiring centre
10
Cylinder safety valve (G3)
11
DHW circulation pump (Not used)
12
Central heating circulation pump (Not used)
13
Boiler 230 V A.C. mains supply
*
Pre-wired links
Table 22 Key to figure 41
NOTICE: DHW LR (Live Return) switched live - with
optional integral diverter valve only.
▶ This input provides connection for a proprietary
external twin channel time control for the DHW
cylinder, (link must be removed).
If an external twin channel control is not fitted, the link
must be in place to ensure a cylinder demand.
All Worcester twin channel digital controls provide
this functionality.
5.7.1 MOUNTING OPTIONAL PLUG-IN CONTROLS - WHEN
OPTIONAL INTEGRAL DIVERTER VALVE IS FITTED
The optional integral diverter valve kit allows for the
Worcester plug-in controls options to be used.
CAUTION:
▶ Isolate the mains electrical supply before starting any
work and observe all relevant safety precautions.
Refer to the Programmer/Timer manual for set up and
operation of the unit.
▶ When connecting Worcester plug -in or EMS
intelligent controls, the links (
figure 41) must be left in the connection points.
Greenstar i System Compact
230V
IN
L
N
L
N
L
N
L
11
12
13
items 8 & 9 in
ErP
- 6 720 813 280 (2015/07)
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