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Mains water pressure
NOTICE: Boiler damage
▶ Non-return, back flow prevention devices (including
those associated with water meters) fitted to the
mains water supply can cause a pressure build up
which could damage the boiler and other household
appliances.
Minimum dynamic mains water pressure for maximum
performance
12/18kW
18/25kW
1.5bar
1.2bar
• Maximum mains fed water pressure 10 bar. If necessary, fit a
pressure reducing valve.
• Where the water main supply has a non-return, back flow prevention
valve fitted, a mini expansion vessel (A) must be connected to the
mains water inlet pipe (B) between the non-return valve (C) and the
boiler (D) as shown below.
A
C
B
Fig. 3
Mains expansion vessel
[A]
Mini expansion vessel
[B]
Mains water inlet
[C]
Non return valve
[D]
Boiler
Use in hard water areas
Normally there is no need for water treatment to prevent scale formation
as the maximum temperature of the heat exchanger is limited by the
electronic control circuit.
In areas where the temporary water hardness exceeds 200ppm,
consideration may need to be given to the fitting of a scale prevention
device. In such circumstances, the advice of the local water authority
should be sought.
4.3
Oil supply
NOTICE: Contaminated oil supplies 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.
Greenstar Heatslave II
ErP -
6 720 813 344 (2014/09)
Key to Oil supply illustrations, figures 4, 5 & 6
25/32kW
1.6bar
Table 3 Key to oil supply feed system
4.3.1
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].
D
6720805209-84.1Wo
Fig. 4
Maximum pipe run for single pipe gravity fed system
Head (m) 10mmØ 12mmØ
0.5
1.0
1.5
2.0
4.3.2
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].
Fig. 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 valves
Single pipe gravity feed system:
1
2
3
4
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.
12
30
25
69
37
91
49
100
Double pipe sub-gravity feed system:
1
11
150mm
2
3
4
Double pipe feed
Pre-Installation
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
11
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