Mounting Optional Plug-In Controls - Worcester Greenstar 25Si Compact Installation, Commissioning And Servicing Instructions

INSTALLATION
Mains voltage connections
*
*
230V
FR FS LR LR
OUT
N L N
7 8 9 10
Fig. 42 Mains voltage connectors
Mains voltage terminal strip
7 External frost thermostat
8 230 V A.C. switched live inputs
• CH - Remove link when connecting external CH control
• DHW - Remove link when connecting external DHW control
9 230 V A.C. mains output to wiring centre
10 DHW charge pump (NOT USED on Combi)
11 DHW circulation pump (NOT USED on Combi)
12 CH circulation pump (NOT USED on Combi)
13 Boiler 230 V A.C. mains supply
* Pre-wired links
Table 22 Key to figure 42
NOTICE: DHW LR switched live
▶ This input provides connection for a proprietary
external twin channel control to time the DHW
preheat function (link must be removed).
All Worcester twin channel digital controls provide
this functionality.

5.7.1 MOUNTING OPTIONAL PLUG-IN CONTROLS

CAUTION:
▶ Isolate the mains electrical supply before starting any
work and observe all relevant safety precautions.
Refer the to Programmer/Timer manual for set up and
operation of the unit.
▶ When connecting Worcester plug-in or EMS intelligent
controls, the links ( items 8 & 9 in figure 42) must
be left in the connection points.
REMOVING THE BLANKING PLATE
The control panel must be released and swung forward slightly to gain
access to the top cover panel, refer to section 7.3 for access to the
control panel.
1. Release the captive screws securing the top cover panel.
2. Remove the cover panel to enable the blanking plate to be removed.
3. Release the three captive screws enough to allow the Installer access
cover to be lowered by 10mm.
4. Lower the Installer access cover to allow the blanking panel to be
removed.
5. Use the tab (1) to lift and also press up on the bottom edge of the
blanking plate to release the clips from the slots in the control panel.
6. Pull the blanking plate forward to remove.
30
230V
IN
L N L N L N L
11 12 13
1.
5.
1.
4.
3.
Fig. 43 Removing the blanking plate
FITTING THE PROGRAMMER/TIMER
When fitting EMS intelligent programmers, step 1 can be
ignored.
1. Connect the ribbon cable to the socket (2) in the control panel,
ensuring that the cable will fit into the recess (3) in the control panel.
2. Align the clips on the back of the Programmer/Timer with the slots in
the control panel.
2.
Fig. 44 Connecting the Programmer/Timer
3. Push the Programmer/Timer in to engage with the slots in the control
panel.
4. Pull the Programmer/Timer down to secure with the clips.
5. Slide the Installer access cover up into position.
6. Secure with the three captive screws.
7. Replace the top cover panel.
8. Secure in position with the captive screws.
▶ Re-secure the control panel.
Greenstar Si Compact
2.
1
6.
3
2
2.
1
1.
ErP - 6 720 813 278 (2015/07)