Bosch Worcester Greenstar Ri ErP + Series Installation And Maintenance Instructions Manual page 15

SYSTEM FILL
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/System make-up
S AND Y PLAN SYSTEMS:
NOTICE: Bypass considerations
▶ Appliances fitted with a modulating pump may not
require a system bypass.
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 9 Key to figures 4, 5, 6, 7 & 8
NOTICE: A drain cock should be fitted at the lowest
point of the heating circuit and beneath the appliance.
6 720 821 670 (2018/06)
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.
SYSTEM LAYOUTS EXAMPLES:
S PLAN LAYOUT - OPEN VENT
3
2
150 mm
max
5
reset max
6
Fig. 4 S plan open vent
Y PLAN LAYOUT - OPEN VENT
3
2
150 mm
max
4
5
reset max
Fig. 5 Y plan open vent
PRE-INSTALLATION
S PLAN LAYOUT
1
7
4
M
6720644744-03.1Wo
Y PLAN LAYOUT
1
7
M
6720644744-04.1Wo
8
8
15