New Complete System Installations - Worcester Greenstar 25Si Compact Installation, Commissioning And Servicing Instructions

8.
3.
5.
6.
Fig. 45 Fitting the Programmer/Timer
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 (preheat time
control available)
7 716 192 054 DT20RF digital RF thermostat with twin channel
programmer (preheat time control available)
7 716 192 052 DT10RF digistat (preheat time control available)
7 716 192 053 DT10RF optimiser (preheat time control available)
7 716 192 065 FR10 intelligent room thermostat
7 716 192 066 FR110 programmable room thermostat (preheat
time control available)
7 716 192 067 FW100 weather compensation controller (preheat
time control available)
7 733 600 001 Comfort I RF (RF thermostat with twin channel
programmer, preheat time control available)
7 733 600 002 Comfort II RF (programmable room thermostat,
preheat time control available)
7 733 600 003 Comfort (twin channel programmer)
7 733 600 039 Comfort wall plate kit
7 738 110 058 Sense I intelligent room thermostat
7 738 111 064 Sense II weather compensation controller (preheat
time control available)
7 716 192 072 Worcester Wave (thermostat)
Table 23 Control accessories

5.7.2 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.
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.
Greenstar Si Compact ErP - 6 720 813 278 (2015/07)
7.
4.
2
, separate time and
THIRD PARTY EXTERNAL TIMER AND TWO ZONES
Pre-wired CH & DHW links
▶ Remove link when connecting external CH control
▶ Remove link when connecting external DHW control
Zone 1
Zone Valve
M
~
N
E
Zone 1 Zone 2
Room Thermostat Room Thermostat
N
L N E
L N E 4
5 6 7
N
E
FR FS LR LR
L
Programmer
Fig. 46 Two room thermostats, one external timer
INTEGRATED TIMER AND TWO ZONES
Zone 1
Zone Valve
M
~
N
E
Zone 1 Zone 2
Room Thermostat Room Thermostat
L
N
L N E
L N E 4
5 6 7
Plug in
Worcester timer.
(see timer operating
FR FS LR LR
instructions for
installation)
Fig. 47 Two room thermostats, one integrated timer
INSTALLATION
M
~
N
L
E L
Zone 2
Zone Valve
N
230V
MAINS
8 9 10
SUPPLY
E L N
230V 230V
OUT IN
N L N L N L N L N L
M
~
N
L
E
L
Zone 2
Zone Valve
L
N
230V
MAINS
8 9 10
SUPPLY
E L N
230V 230V
OUT IN
N L N L N L N L N L
31