Mains Supply; Electrical Supply; Oil Supply; Single Pipe Gravity Feed System - Bosch Worcester Greenstar Utility 32/50 Installation, Commissioning And Servicing Instruction Manual

Pre-Installation
4.2

Mains supply

4.2.1

Electrical supply

• Supply: 230 V - 50 Hz
• Cable: PVC insulated 0.75 mm2 (24 x 0.2mm) temperature rated to
90°C.
• External 5A fuse to BS1362.
• The appliance must be earthed.
• This appliance must not be connected to a three phase supply.
• IPX4D.
• Wiring between the appliance and the electrical supply must comply
with IET wiring regulations and any local regulations which may apply
for fixed wiring to a stationary appliance.
• Any additional components that are connected to the appliance with
mains electrical supply must not have a separate supply.
4.3

Oil supply

NOTICE: Contaminated oil can damage the appliance.
Failure to ensure that the oil supply is clear of
contaminants may invalidate the appliance warranty.
▶ Ensure the oil supply is free of contaminates and
measures are taken to prevent contamination of the
appliance.
• This appliance is suitable for Kerosene (Class C2) only, no other
fuel must be used.
• Plastic or steel tanks should be installed to BS 5410.
A steel tank should conform to BS 799: part 5 and have a slope of
1:24 away from the outlet with a sludge cock at the lower end.
• Do not use galvanised steel tanks or pipework for the oil system.
• Do not use soldered joints on the oil supply pipework.
Key to Oil supply illustrations, figures 3, 4 & 5
1 OIl storage tank
2 Full base (plastic tank)
3 Isolating valve
4 Oil strainer and water separator
5 Fire valve to BS 5410
6 External wall
7 Oil filter (70μm max filtration size)
8 Fire valve sensor
9 Oil pump
10 Oil burner
11 Non-return valve
12 De-aerator
13 Appliance isolation valve
Table 3 Key to oil supply feed system
10
4.3.1

Single pipe gravity feed system:

The oil storage tank [1] must be positioned so that the oil level does not
exceed 4 metres above the level of the burner oil pump [9] and in
addition the oil level must be at least 300mm above the oil pump [9].
Where the maximum oil level in the oil storage tank exceeds 4 metres, a
head breaking device must be installed between the tank [1] and the
burner oil pump [9].
1
2 3 4
Fig. 3 Single pipe feed
All dimensions are in metres unless otherwise stated.
The maximum pipe run figures are based on using
copper pipe with an inside diameter of 2mm less than
the outside diameter.
Maximum pipe run for single pipe gravity feed system
Head (m) 10mmØ 12mmØ
0.5 12 30
1.0 25 69
1.5 37 91
2.0 49 100
4.3.2

Double pipe sub-gravity feed system:

Maximum suction height 3.5 metres. Non-return valves must be fitted to
the inlet and return oil line between the oil pump [9] and oil storage tank
[1].
1
11
150mm
2 3 4
Fig. 4 Double pipe feed
Maximum pipe run for double pipe sub-gravity feed system
Head (m) 10mmØ 12mmØ
0 50 100
0.5 44 100
1.0 38 95
1.5 32 80
Greenstar Utility
6 8
9 10
3 7 5 13
6720813284-08.2Wo
Head (m) 10mmØ 12mmØ
2.5 62 100
3.0 74 100
3.5 87 100
4.0 99 100
6 8
5
9 10
3 7 13
6720813284-09.2Wo
Head (m) 10mmØ 12mmØ
2.0 26 66
2.5 20 50
3.0 14 37
3.5 8 22
ErP - 6 720 821 751 (2018/04)