Pipework - Worcester Greenstar Heatslave II 12/18 Installation, Commissioning & Servicing Instructions

Pre-Installation
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
3 4
2 3
Fig. 4 Single pipe feed
[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 boiler casing
μ
[7] Oil filter (70 m max filtration size)
[8] Fire valve sensor
[9] Oil pump
[10] Oil burner
[11] Non-return valve
[12] De-aerator
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 fed system
Head [M] 10mmØ 12mmØ
0.5 12 30
1.0 25 69
1.5 37 91
2.0 49 100
Double pipe sub-gravity fed 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. 5 Double pipe feed
10
6 8
1m Min.
9 10
7 5 13
6720809437-41.2Wo
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
1m Min.
3 7 13
6720809437-42.2Wo
Maximum pipe run for double pipe sub-gravity fed system
Head [M] 10mmØ 12mmØ
0 50 100
0.5 44 100
1.0 38 95
1.5 32 80
Single pipe suction lift with de-aerator
Maximum suction height 3.5 metres. The oil tank [1] must be positioned
below the oil pump [9]. Create an inlet and return loop between the de-
aerator [12] and oil pump [9].
A non-return valve must be incorporated within the de-aerator or fitted
to the oil line between the oil storage tank [1] and the de-aerator [12].
A top feed oil tank fitted with a de-aerator using an internal non-return
valve should have any non-return valves fitted in the base of the tank to
the suction line removed to assist purging air from the oil line.
1
2 3 4
Fig. 6 De-aerator feed
Maximum pipe run for single pipe suction lift with de-aerator
2.5kg/h
Head [M] 8mmØ 8mmØ
0 100
0.5 95
1.0 80
1.5 70
2.0 60
2.5 45
3.0 35
3.5 25
The table and illustration above is a guide only and does
not in any way override the de-aerator manufacturer's
instructions
4.2.4

Pipework

CAUTION: Fire protection device
▶ Under no circumstances should a combination
isolating/fire valve be used as the sole fire protection
device
▶ Use flexible hoses to connect to the oil pump [9].
▶ Lay the oil supply pipe as straight and level as possible to avoid air
pockets and unnecessary friction losses. Route away from the boiler
access door or other hot surfaces.
▶ Install a manual isolating valve [3] to the oil supply pipe, as close to
the oil storage tank [1] as possible.
▶ Fit an oil strainer and water separator [4] to the oil supply pipe, near
the oil storage tank. Fit an additional oil filter ([7], 70 μm max
filtration size) close to the boiler, but not inside the boiler casing.
Greenstar Heatslave II External
Head [M] 10mmØ 12mmØ
2.0 26 66
2.5 20 50
3.0 14 37
3.5 8 22
12 6 8
5 9 10
13
1m Min.
3 7
6720809437-43.2Wo
FUEL FLOW RATE
5kg/h 10kg/h 10kg/h
8mmØ 10mmØ
55 26 100
45 23 100
40 20 90
35 17 75
30 14 65
25 11 50
15 8 35
10 5 20
ErP - 6 720 813 345 (2014/09)