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Pre-installation
Sealed primary systems:
NOTICE: ARTIFICALLY SOFTENED WATER MUST NOT
BE USED TO FILL THE SYSTEM.
• If the system is sealed then the system must be filled using a WRAS
approved filling loop or comply with figure 3 for system fill.
• The expansion vessel (2) must be fitted as close as possible to the
appliance in the central heating return.
• Do not use galvanised pipes or radiators.
SYSTEM FILL
Heating
return
Hose union
SV
Temporary hose
CV = Check Valve
SV = Stop Valve
SYSTEM MAKE UP
Heating
AA
return
SV
Fig. 3
System Fill
S and Y plan systems:
1
Static head -
Minimum static head 250mm measured from the highest point
in the heating system (top surface of the appliance or the
highest point in the heating system) to the water level in the feed
and expansion tank
2
Heating vent (22mm minimum)
3
Primary cold feed (15mm minimum)
4
Diverter valve and zone valve
5
Pump, maximum power 90 Watts
6
Automatic bypass
7
Radiator valve (Flow)
8
Lock shield valve (Return)
9
Expansion vessel
10
Pressure gauge
11
3 bar pressure relief valve
12
Stop cock
Table 7 Key to figures
NOTICE: A drain cock should be fitted at the lowest
point of the heating circuit and beneath the appliance.
Fully pumped sealed system:
The central heating sealed system must be filled using a WRAS approved
filling loop or comply with figure 3 for System fill.
12
Mains
supply
CV
CV
SV
Test point
AA = Auto Air vent
CV = Check Valve
Make up
vessel
CV
1000 mm (39 in)
above the highest
point of the system.
Existing installations
3
2
150 mm
max
M
5
6
3
2
150 mm
max
4
M
5
4
M
5
12
MCW
11
10
9
3
2
150 mm
max
5
4
6
Greenstar Ri Compact
S PLAN LAYOUT
1
7
4
Y PLAN LAYOUT
1
7
SEALED SYSTEM LAYOUT
7
OPEN VENT LAYOUT
1
7
ErP
6720813282 (2015/07)
8
8
8
8
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