GREENSTAR 12Ri ErP, Installation, Commissioning And Servicing Instructions

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PRE-INSTALLATION
Greenstar Ri ErP - 6 720 813 283 (2015/07) 12
SEALED PRIMARY SYSTEM:
• The CH sealed system must be filled using a WRAS approved filling
loop or comply with figure 2 for system fill.
• An expansion vessel, of a size suitable for the system, must be fitted
as close as possible to the appliance in the central heating return.
• Also fit a pressure gauge, a 3 bar pressure relief valve and stop cock
(fixed cylinder type or sealed system approved connection).
• Do not use galvanised pipes or radiators .
SYSTEM FILL
Fig. 2 System fill/System make-up
S AND Y PLAN SYSTEMS:
FULLY PUMPED SEALED SYSTEM:
The central heating sealed system must be filled using a WRAS approved
filling loop or comply with figure 2 for System fill.
S PLAN LAYOUT
Fig. 3 S plan
Y PLAN LAYOUT
Fig. 4 Y plan
SEALED SYSTEM Y PLAN LAYOUT
Fig. 5 Sealed system
NOTICE: Artificially softened water must not be used to
fill the central heating system.
NOTICE: Bypass
▶ Generally a bypass is not necessary on a Y plan system
as one of the ports is open to flow.
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/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 8 Key to figures 3, 4 & 5
NOTICE: A drain cock should be fitted at the lowest
point of the heating circuit and beneath the appliance.
SYSTEM FILL
CV = Check Valve
SV = Stop Valve
SV SV
Test point
Temporary hose
Hose union
CV
CV
Heating
return
Mains
supply
SYSTEM MAKE UP
AA = Auto Air vent
CV = Check Valve
SV
CV
AA
Make up
vessel
Heating
return
1000 mm (39 in)
above the highest
point of the system.
6720644743-08.2W
o
8
7
1
3
2
4
6
5
150 mm
max
M
M
reset max
6720644744-03.1Wo
8
7
1
3
2
4
5
150 mm
max
reset max
M
6720644744-04.1Wo
MCW
8
7
4
10
12
11
9
5
reset max
M
6720644744-05.1Wo