INSTALLATION
Greenstar i System Compact - 6 720 807 726 (2013/05)
29
NEW COMPLETE SYSTEM INSTALLATIONS
If a new complete heating system installation is in a new build property
or is a first time installation in an existing property, 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.
An alternative would be individual electronically controlled TRVs. Hot
water supplied from a storage system would require separate time and
temperature control.
If the dwelling is over 150m
2
, a separate time and temperature control
for each zone is required. All radiators must have a TRV fitted in all rooms
except bathrooms and rooms with thermostats.
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.
Figures 52 and 53 give some suggestions regarding zoning the system
for a small dwelling, less than 150m
2
, using a third party programmer.
EXTERNAL 230V PROGRAMMER AND TWO HEAT ZONES WITH
VENTED CYLINDER (S-PLAN PLUS)
(For dwellings of less than 150m
2
)
Fig. 52 External controls with vented cylinder
All of these points are wired to
this point
All of these points are wired to
this point
All of these points are wired to
this point
Table 10 Connection legend
L
E
N
230V Mains Voltage
Double Pole Fused Spur
6720646609-47.1Wo
Cylinder
T/Stat
C
N
N
M
~
L
N
E
M
~
L
N
E
E
N
L
L
N
E
4
5
6
7
8
9
10
Heating
Zone 1 Valve
Cylinder
Zone Valve
M
~
L
N
E
Heating
Zone 2 Valve
Room T/Stat
Zone 2
Room T/Stat
Zone 1
EMS
230V
IN
230V
OUT
FR FS LR LR
L
N
L
N
L
N
L
N
L
N
SYSTEM BOILER CONNECTIONS
PRE WIRED LINK
CH ON
HW ON
L
N
Programmer
L
L
N
N
E
E
