Water Systems And Pipework - Bosch Worcester Greenstar Danesmoor 12/18 Installation, Commissioning And Servicing Instruction Manual

c) Single pipe suction lift with de-aerator
Maximum suction height 3.5 metres. The oil tank (A) must be positioned below the oil pump (J). Create an inlet and return loop between the de-aerator
(M) and oil pump (J).
A non-return valve must be incorporated within the de-aerator or fitted to the oil line between the oil storage tank (A) and the de-aerator (M).
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.
Maximum pipe run for single pipe suction lift with de-aerator
2.5kg/h 5kg/h
Head (m) 8mmØ 8mmØ
0 100 55
0.5 95 45
1.0 80 40
1.5 70 35
[NOTE:] The table and illustration above is a guide only and does not in any way override the de-aerator manufacturer's instructions
Pipework
▶ Use copper pipe of the correct diameter according to the information
shown opposite.
– If using soft copper pipe (R220) with a compression fitting, an
insert must be used to prevent the pipe from collapsing or
distorting when the fitting is tightened.
▶ Slide nut (P) and olive (R) onto the oil supply pipe (H).
▶ Slide insert (S) into the pipe.
▶ Offer the pipe to the fitting (T) and tighten the nut (P).
▶ Use flexible hoses to connect to the oil pump (J).
▶ Lay the oil supply pipe (H) 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 (B) to the oil supply pipe (H), as close
to the oil storage tank (A) as possible.
▶ Fit an oil strainer and water separator (C) to the oil supply pipe, near
the oil storage tank. Fit an additional oil filter (N, 70
size) close to the boiler, but not inside the boiler casing.
▶ Fit a fire valve in accordance with BS 5410. The fire valve (D) should
be fitted externally to the building with the fire valve sensor (F)
located within the appliance case. A fire valve with a shut off
temperature of 85°C or higher must be fitted to avoid the possibility
of nuisance shut offs. A capillary type valve provides a neat and
simple installation. Alternatively, a fusible link or electrical system
may be used.
Under no circumstances should a combination isolating/fire valve be
used as the sole fire protection device.
P
R
H
S
Danesmoor Kitchen and Kitchen System 6 720 808218 (2013/10)
FUEL FLOW RATE
10kg/h 10kg/h
8mmØ 10mmØ
26 100
23 100
20 90
17 75
μ
m max filtration
T
6720808218-107.1Wo
2.5kg/h 5kg/h
Head (m) 8mmØ 8mmØ
2.0 60 30
2.5 45 25
3.0 35 15
3.5 25 10
4.3

Water systems and pipework

NOTICE:
▶ The boiler should not be allowed to operate with a
return temperature of less than 30°C when the
system is up to operating temperature.
Primary system plastic pipework:
• Any plastic pipework used for the CH system must have a polymeric
barrier, complying with BS 7921 and installed to BS 5955 with
1000mm (minimum) length of copper or steel pipe connected to the
boiler.
• Plastic pipework used for underfloor heating must be correctly
controlled with a thermostatic blending valve limiting the
temperature of the circuits to approximately 50°C with 1000mm
(minimum) length of copper or steel pipe connected to the boiler,
and a 20K differential must be maintained at the appliance.
Primary system/connections/valves:
• Do not use galvanised pipes or radiators.
• All system connections, taps and mixing valves must be capable of
sustaining a pressure of 3 bar.
• Radiator valves should conform to BS 2767:10.
• All other valves should conform to BS 1010.
• An automatic bypass valve must be connected between the heating
flow and return where TRVs are used on all radiators, fitted to give at
least a 3 metre circuit when activated.
• Drain cocks are required at all the lowest points on the system.
• Air vents are required at all high points on the system.
Pre-Installation
FUEL FLOW RATE
10kg/h 10kg/h
8mmØ 10mmØ
14 65
11 50
8 35
5 20
11