Grant EURFBH18MAX4, Installation, Commissioning & Maintenance Instructions

Page: 13 / 52

A fusible wheelhead type combined isolating/fi re valve MUST
NOT be used in place of a remote sensing fi re valve.
The fi re valve must be located outside; just before the oil line enters
the building, with the fi re valve sensor located above the burner. A
spring clip for mounting the sensor is supplied fi tted to the boiler, on
the rear of the control panel.
The fi re valve should be located after the second (15 micron) fi lter,
i.e. between the fi lter and the point at which the oil line enters the
building. Refer to Figures 3-1 to 3-3.
The fi re valve must have an operating temperature of between 90
and 95°C to avoid unnecessary nuisance shut-offs to the oil supply.
A fl exible fuel hose and ¼ isolating valve are supplied lose with the
boiler, to make the final connection to the burner.
If a two-pipe system or deaerator is to be used,the deaerator must
be fitted externally. A solid metal type can be fitted internally but
must be vented to atmosphere externally. The following additional
items will be required:
• Flexible fuel hose male x ¼ female (product code: RBS36 -
900 mm / product code: RBS36XS - 600mm)
• x ¼ BSP adaptor (product code: Z3003602)
• ¼ isolating valve (product code: ISOLATION1/4)
These are available to purchase from Grant Irl.
Metal braided flexible fuel hoses should be replaced ANNUALLY
when the boiler is serviced.
Long life flexible fuel hoses should be inspected annually and
replaced, if necessary, or after a maximum five years service life.
3.1.3 SINGLE PIPE (GRAVITY) SYSTEM 
(REFER TO FIGURE 31)
Head A (m)
Maximum pipe run (m)
10 mm OD pipe 12 mm OD pipe
0.5 10 20
1.0 20 40
1.5 40 80
2.0 60 100
IF THE STORAGE TANK OUTLET IS AT LEAST 300 MM ABOVE
THE LEVEL OF THE BURNER OIL PUMP, A SINGLE PIPE
(GRAVITY) SYSTEM SHOULD BE USED.
The maximum height of the oil level above the burner oil pump
when the tank is full, must not exceed four metres. If this height is
exceeded, a pressure reducing valve must be fi tted in the oil supply
pipe between the tank and the burner oil pump.
The maximum length of pipe run from the tank to the burner is limited
by the minimum head of oil (the height of the tank outlet above the
burner oil pump).
3.1.4 TWO PIPE SYSTEM(REFER TO FIGURE 32)
Height A (m)
Maximum hose length (m)
10 mm Diam ext. 12mm diam ext.
0 35 100
0.5 30 100
1.0 25 100
1.5 20 90
2.0 15 70
3.0 8 30
3.5 6 20
Fuel Storage and Fuel System
CAUTION
CAUTION
If the storage tank outlet is below the level of the burner oil pump, a
two pipe (sub gravity) system can be used.
The return pipe should be at the same level as the tank outlet,
between 75 to 100 mm above the base of the tank. The return pipe
should be a suffi cient distance from the tank outlet so as to prevent
any sediment disturbed by the return entering the supply pipe from
the tank.
A non-return valve should be fi tted in the supply pipe, along with a
fi re valve and fi lters (refer to section 3.1.2 - fuel pipes). A non-return
valve should also be fi tted in the return pipe if the top of the tank is
above the burner oil pump.
The maximum suction height (from the tank outlet to the level of the
burner oil pump), must not exceed 3.5 metres.
The pump vacuum should not exceed 0.4 bar. Beyond this limit, gas
is released from the oil.
For guidance on the installation of top outlet fuel tanks and sucti
oil
supply pipe sizing, refer to OFTEC Technical Book 3: Storage and Supply,
available for purchase from OFTEC.
If a two-pipe system is to be used, the following additional items will be
required:
• Flexible fuel hose male x ¼ female (product code: RBS36 - 900 mm
/ product code: RBS36XS - 600mm)
• x ¼ BSP adaptor (product code: Z3003602)
• ¼ isolating valve (product code: ISOLATION1/4)
These are available to purchase from Grant IRL.
Page 13
IMPORTANT: If the oil supply piping is
renovated with a twin-tube passage from the
tank to the filter pot towards single-tube, then
reduce the diameter of the copper piping.
The hoses must NOT be used outside the boiler.
A metal bowl type fi lter pot with micron filter
(consumable) must be installed on the oil
supply line next to the boiler. This should be
mounted leaving enough space around and
below to service the fi lter. A shut-off valve
must be installed before the fi lter pot to isolate
it and allow its maintenance.
A second fi lter (10 to 15 μm requested by
Grant) must be placed as close as possible to
the burner to protect the pump and the burner
nozzle from contamination. See Figures 3-1
through 3-3.
2 oil hoses with adapter and ¼ “BSP isolation
valve are supplied separately with the boiler
for connection to the burner.
Braided metal hoses must be replaced
annually when servicing the boiler. Long
life hoses should be inspected annually and
replaced at least every 60 months.
Grant IRL recommends TOC DUO type filter
pots including an air separator.