Mounting Optional Plug-In Controls; Domestic Installations - Worcester GREENSTAR 24i Junior Installation, Commissioning And Servicing Instructions

INSTALLATION

4.7.1 MOUNTING OPTIONAL PLUG-IN CONTROLS

Refer to the Programmer/Timer manual for set up and
operation of the unit.
PLUG-IN PROGRAMMER/TIMERS
The programmers/timers listed can be used with the boilers stated on
the front of this manual.
Part number Description
7 716 192 036 MT10 mechanical timer
7 716 192 037 MT10RF mechanical thermostat
7 716 192 038 DT20 twin channel digital timer
7 716 192 054 DT20RF digital RF thermostat with twin channel
programmer
7 716 192 052 DT10RF digistat
7 716 192 053 DT10RF optimiser
7 716 192 065 FR10 intelligent room thermostat
7 716 192 066 FR110 programmable room thermostat
7 716 192 067 FW100 weather compensation controller
REMOVING THE BLANKING PLATE
▶ Remove boiler casing to access control panel.
▶ Refer to figure 48 and remove the screw securing the control panel.
▶ Lower the control panel into the horizontal service position.
1. Release the securing screw.
2. Pull the cover panel up to remove.
3. Grip the tab [1], pull up to disengage the clips.
4. Pull forward to remove the blanking plate.
1.
3.
Fig. 51 Removing the blanking panel
FITTING THE PROGRAMMER/TIMER
1. Align the connector pins [1] with the socket on the circuit board [2]
and push fully home. Ensure the ribbon cable fits into the recess [3]
2. Align the Programmer/Timer and locating clips with the slots.
2.
Fig. 52 Plug in connector
1. Once the Programmer/Timer is aligned push the module into the slots.
28
2.
1
4.
3
2.
2
1.
1
2. Push the module down to secure into position.
3. Replace the cover panel to lock the module in place.
4. Replace the securing screw.
4.
2.
1.
Fig. 53 Securing the module into the control panel

4.7.2 DOMESTIC INSTALLATIONS

NEW COMPLETE SYSTEM INSTALLATIONS
If a new complete heating system is installed in a new build property or it
is a first time installation in an existing property, the heating systems
must conform to current building regulations Part L1a.
All new heating systems in dwellings must have at least two heating
zones. Each of these zones will be controlled by a thermostat and zone
valve.
The exception to this are single storey, open plan dwellings where the
living area is more than 70% of the total usable floor area. Then this type
of dwelling can be controlled as one zone.
An alternative would be individual electronically controlled TRVs.
For dwellings with a floor area over 150m
temperature control for each zone is required. All radiators must have
TRVs fitted in all rooms except bathrooms and rooms with thermostats.
Figures 54 and 55 give some suggestions regarding zoning the system
for a small dwelling, less than 150m
programmer or a Worcester programmer.
THIRD PARTY EXTERNAL TIMER AND TWO ZONES
Zone 1
Zone Valve
M
~
N
E
Zone 1 Zone 2
Room Thermostat Room Thermostat
N
N
L E
L N E 4
5 6 7
CH ON
E
M
Programmer
Fig. 54 Two room thermostats, one external timer
3.
2
, separate time and
2
floor area, using a third party
M
~
N
L
E L
Zone 2
Zone Valve
N
230V
MAINS
8 9 10
SUPPLY
N E L
L L N N L
R S S
ST10
6 720 802 047 (2013/05)