Grant 50/70, 70/90, 90/140, 140/160, 160/200 User, Installation And Servicing Instructions
...
USER, INSTALLATION
and
SERVICING INSTRUCTIONS
MULTI PASS
For use with Kerosene or Gas Oil
Kitchen and Boiler House Models
50/70, 70/90, 90/140, 140/160 and 160/200
This appliance is deemed a controlled service and specific regional statutory
requirements may be applicable
After installing the boiler leave these instructions with the User
For System boiler installation and wiring refer to separate Supplement
Part No. DOC 02 Rev.12 October 2004
2
Multi Pass Oil Boilers
Subject PageSection
1 User instructions ...................................... 3
2 Technical information .............................. 6
3 General boiler information....................... 10
4 Boiler installation..................................... 26
5 Commissioning......................................... 33
6 Information for the user ........................... 35
7 Boiler servicing ........................................ 36
8 Wiring diagrams....................................... 43
9 Fault finding ............................................. 46
10 Burner spares ........................................... 48
11 Health and safety information.................. 50
12 EC declaration of conformity .................. 51
Date % CO2Net flue gas
temp.
Smoke No. Service engineer/Tel. No.
Date:..............................
Commissioning engineer:.............................................................................. Tel. No: ....................................
Boiler model/output: ........................................ Btu/h Fuel type: Kerosene or Gas oil
Nozzle size: .................................... Pump pressure: .................... Air setting: ...........................
Flue gas % CO2: ............................. Net flue gas temp:................ Smoke No:...........................
It is recommended that the boiler should be regularly serviced, at least once a year, and the details entered below by the
service engineer.
COMMISSIONING REPORT
SERVICE LOG
LIST OF CONTENTS
3
Multi Pass Oil Boilers
1 - USER INSTRUCTIONS
The boiler will provide domestic hot water and central
heating and is fully automatic once switched on. Kitchen
models have a 'boiler on' neon, see Fig. A, which lights
when the boiler is switched on, but does not necessarily
indicate the burner is firing.
If your Kitchen model has a programmer fitted, it will
provide hot water and central heating during the
periods set on the programmer.
To access the Kitchen model controls, open the front
door from the right (may be altered to open from the
left if required).
Controls for Multi Pass Kitchen models - Fig. A
°C
90
75
60
Boiler
thermostat
Overheat thermostat
reset button
(under plastic cap)
Controls for Boiler House models - Fig. B
1 Ensure that - There is sufficient fuel, of the
correct type, in the supply tank and all fuel supply
valves are open. The water supply is on. The
electricity supply to the boiler is off. The boiler
On/Off switch is set to OFF (Kitchen models). The
room thermostat (if fitted) is at the desired setting.
The boiler thermostat is set to the required setting
(see Section 1.7).
2 Switch on the electricity supply to the boiler.
Note: Boiler House models will light at this stage.
3 For Kitchen models, set the On/Off switch to ON
and, if fitted, the programmer (CH or HW) to ON.
The boiler will now light automatically.
4 If you have a programmer fitted in the control panel
(Kitchen models only), refer to the Programmer
Section and set the programmer. Set the HW and CH
functions to TIMED. The boiler will now operate
during the 'on' periods set on the programmer.
About your boiler
1.1
Boiler controls (see Fig. A or B)
1.2
Lighting your boiler (see Fig. A or B)
1.3
4
Multi Pass Oil Boilers
Kitchen models for short periods - Set the On/Off to
OFF.
To restart, simply set the switch to ON.
Kitchen models for long periods: Set the On/Off
switch to OFF and switch off the electricity supply to
the boiler. If required, the fuel supply valve may be
closed and the water and electricity supplies turned off
at the mains.
To restart, refer to the full lighting instructions above.
Boiler House models for short periods - Switch off
the electricity supply to the boiler.
To restart, switch on the electricity supply to the boiler.
Boiler House models for long periods - Switch off
the electricity supply to the boiler. If required the fuel
supply valve may be closed and the water and
electricity supplies turned off at the mains.
To restart, refer to the full lighting instructions given
in Section 1.3.
1 Check that the boiler On/Off switch is ON.
2 Check that the programmer (if fitted) is working
and is in an 'on' period.
3 Check that all thermostats are set to the desired
setting and are calling for heat.
4 Check if the burner 'Lock-out' reset button is lit. If it
is, press it to start the burner. If the burner fails to light
and goes to 'Lock-out' again, check that you have
sufficient fuel in the storage tank and that the fuel
supply valve is open.
5 Ensure that a fuse has not blown or that the
electricity supply has not failed.
6 Check to see if the safety thermostat has operated
(see Section 1.7).
If the burner still fails to light after carrying out these
checks then a fault exists. Switch off the electricity
supply to the boiler and contact your Service engineer.
Multi Pass boilers will operate on either Class C2 Kerosene
or Class D Gas Oil to BS 2869:1998. Your Installer will
have informed you of the type of fuel your boiler has been
set to use and he will have marked this on the boiler data
label. You should always quote the type of fuel you
require when ordering from your supplier.
Note: Balanced flue models (flue terminal through
the wall) must only be used with Kerosene, unless the
flue terminal is more than 2.0 m above ground level.
Do not wait until the fuel runs out before you order
some more. Sludge in the bottom of the tank may be
drawn into the fuel lines. If it is possible, switch off the
boiler when the new supply is delivered and leave the
fuel to settle for an hour before restarting the boiler.
1 Boiler thermostat - This control allows the
temperature of the water leaving the boiler to heat
the radiators and domestic hot water to be adjusted.
Note: If you have a cylinder thermostat on your hot
water cylinder, this will control the temperature of
your domestic hot water. The boiler thermostat
setting must be equal to or above the cylinder
thermostat setting to enable the cylinder thermostat
to control the domestic hot water system.
The boiler thermostat has an operating range of 65
to 85°C. The following settings are recommended:a Heating and hot water in Winter 85°C
b Hot water only in Summer 65°C
2 Burner Lock-out reset button - If there is a
burner malfunction, a built-in safety circuit
switches the burner off and the Lock-out reset
button will light. Usually such malfunctions are
short lived and pressing the reset button will
restore normal operation.
If the burner continually goes to 'Lock-out' a fault
exists or the fuel supply is low. If you have sufficient
fuel, you will need to call your Service engineer.
3 Safety thermostat - Your boiler is fitted with a
safety overheat thermostat which will automatically
switch off the boiler in the case of a control
malfunction causing overheating.
If your boiler goes off and you try to light it but
nothing happens and the 'Lock-out' reset button on
the burner is not lit, the overheat thermostat has
probably operated. The boiler will not light until
the thermostat is reset. To reset, unscrew the small
plastic cap (see Fig. 23 or 24), press the button
then replace the cap.
If this condition continually repeats, contact your
Service engineer.
4 Programmer (if fitted) - Refer to the instructions
supplied with the Programmer.
1 - USER INSTRUCTIONS
Turning off your boiler (see Fig. A or B)
1.4
Points to check if burner fails to light
1.5
About your fuel
1.6
General notes and care of your system
1.7
5
Multi Pass Oil Boilers
5 Ventilation - Always ensure that the boiler has
adequate ventilation. Any ventilation openings
provided by the Installer must not be obstructed.
Periodically check that they are clear.
Do not attempt to 'box in' the boiler or build a
compartment around it before consulting your
Installer.
Do not place any combustible material around or
on the boiler or flue pipe.
6 Flue terminal - The flue terminal on the outside
wall must not be obstructed or damaged.
In severe conditions check that the terminal does
not become blocked by snow.
7 Frost protection - Your Installer may have fitted a
frost thermostat. If not, and you are likely to be
away for a short time, leave the boiler on with the
boiler thermostat set at a low setting. For longer
periods the boiler and system should be drained.
Contact your Service engineer for draining and
filling the system.
8 Cleaning and servicing - Lightly wipe over the
case with a damp cloth and a little detergent. Do
not use abrasive pads or cleaners.
You should have your boiler serviced at least once
a year to ensure safe and efficient operation.
Contact your Service engineer for further details.
9 Failure of electricity supply - If the electricity
supply fails, the boiler will not operate. It should
relight automatically when the supply is restored.
If a programmer is fitted (Kitchen models only) it
will retain the time settings for up to 24 hours and
will not have to be reset to the correct time of day
when the supply is restored (the display remains for
up to 1 hour, but will re-appear when the supply is
restored).
The boiler requires a 230/240 V ~ 50 Hz supply. It
must be protected by a 5 Amp fuse.
Warning: This appliance must be earthed.
If your boiler is operating on a sealed heating system,
the installer will have pressurised the system and
should have told you (or set it on the pressure gauge)
the system pressure when cold (this is normally
between 0.8 and 1.0 bar, which will increase slightly
when hot). If the pressure (when cold) is below the set
pressure mentioned above, you should contact your
Installer or Service engineer to re-pressurise the
system. If the system requires frequent re-pressuring,
ask your Installer or Service engineer to check the
heating system for leaks.
The boiler or system will be fitted with an automatic
air vent to remove air from the system. Any air trapped
in the radiators should be removed by venting the
radiators using the vent screw at the top of each
radiator. Only vent a radiator if the top is cool and the
bottom is hot. Excessive venting will reduce the
system pressure, so only vent when necessary and
check the system pressure as mentioned above. Repressurise the system if necessary.
Note: Your system may incorporate a 'Top-Up' vessel,
advice on how to use it should be obtained from your
installer.
The boiler or system may be fitted with a safety valve
to release excess pressure from the system. If water or
steam is emitted from the end of the safety valve
discharge pipe, switch off the boiler and contact your
Installer or Service engineer.
The expansion vessel air charge must be checked
annually. Failure to maintain an adequate air
charge in the vessel may invalidate the warranty.
1 - USER INSTRUCTIONS
Electricity supply
1.8
Sealed central heating system
1.9
6
Multi Pass Oil Boilers
Model
Water content litre
gal
** Weight (dry) kg
lb
Max. heat input (Kerosene) kW
Btu/h
Flow and return connections
Flue diameter (conventional)
Waterside resistance
Flow/Return temp. diff. of 10°C
Flow/Return temp. diff. of 20°C
Maximum static head
Minimum circulating head
Boiler thermostat range
Limit (safety) stat switch off temp.
Max. hearth temperature
Electricity supply
Motor power
Starting current
Running current
Oil connection
Conventional flue
Max. operating press.
Sealed system
Open system
28 m
1m
65 to 85°C
111°C ± 3°C
Less than 50°C
230/240 V ~ 50 Hz Fused at 5 Amp
¼" BSP Male (on end of flexible fuel line)
Minimum flue draught - 8.7 N/m² (0.035 in wg)
Maximum flue draught - 37 N/m² (0.15 in wg)
2.5 bar
3 bar
* Boiler House model only
**Weight includes burner but excludes flue
125 W max.
2.5 Amp
0.95 Amp
70/90
19
4.2
117 (98)*
258 (216)*
27.6
94 200
Boiler technical data
2.1
2 - BOILER TECHNICAL INFORMATION
37.5 mbar
6.1 mbar
1" BSP
100 mm (4 in)
8.7 mbar
2.7 mbar
125 mm (5 in)
11/4" BSP
50/70
19
4.2
115
253
21.4
73 000
160/200
36.0
7.9
210 (197)*
462 (433)*
62.5
212 000
150 mm (6 in)
90 W max.
2.6 Amp
0.85 Amp
90/140
26
5.7
148 (125)*
326 (275)*
43.7
149 140
140/160
36.0
7.9
210 (197)*
462 (433)*
49.4
169 600
7
Multi Pass Oil Boilers
Kerosene Notes:
1 The data given above is approximate only and is based on the boiler being used with a low level balanced flue.
2 The above settings may have to be adjusted on site for the correct operation of the burner.
3 Gas Oil is not suitable for use with low level balanced flue models, unless the flue terminal is higher than 2.0 m above
outside ground level.
4 The installer must amend the boiler data label if the type of fuel or nozzle used is changed.
5 The 50/70, 70/90and 90/140 models use Riello burners. The 140/160 and 160/200 models use EOGB Sterling 90
burners.
6 * Indicates the factory set output.
7 ** Net thermal efficiency (BSRIA).
8 The net flue gas temperatures given above are ± 10%.
9 When commissioning, or when the output or fuel is changed, the air damper must be adjusted to obtain the correct
CO2 level and the installer must amend the data label.
10 When downrating the 50/70 model to 50 000 or 60 000 Btu/h, an LD2 head must be fitted.
11 *** Flue gas temperatures taken at combustion door test point will be approximately 25°C higher.
2 - BOILER TECHNICAL INFORMATION
Note: All boilers are despatched for use with kerosene.
Multi Pass oil boilers using Class C2 kerosene
2.2
(kW)
14.7
17.6
20.5
20.5
23.5
26.4
32.2
36.7
41.0
41.0
47.0
47.0
52.8
58.6
Model
(Btu/h)
50 000
60 000
70 000
70 000
80 000
90 000
110 000
125 000
140 000
140 000
160 000
160 000
180 000
200 000
95.4
95.2
96.0
96.0
95.7
95.8
94.5
94.1
93.8
(Btu/h)
52 400
63 000
73 000
73 000
83 780
94 200
116 400
132 800
149 140
149 140
169 600
169 600
190 800
212 000
(kW)
15.3
18.5
21.4
21.4
24.5
27.6
34.1
38.9
43.7
43.7
49.7
49.7
55.9
62.1
Nozzle
0.50/60°S
0.60/60°S
0.60/60°S
0.60/60°EH
0.75/60°EH
0.75/60°EH
1.00/60°ES
1.10/80°EH
1.25/60°S
1.25/60°S
1.35/60°S
1.35/60°S
1.50/60°S
1.65/60°S
Oil
press.
(bar)
7.00
7.00
9.00
8.50
7.00
9.50
8.00
8.50
8.25
7.50
8.25
8.25
8.00
9.25
Smoke
No.
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
Fuel flow
rate
(kg/h)
1.33
1.60
1.87
1.87
2.13
2.40
3.18
3.24
3.80
3.80
4.34
4.34
4.76
5.39
Flue gas
temp.***
(°C)
168
166
167
167
166
168
180
185
184
185
195
195
195
195
CO
2
(%)
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
Flue gas mass
flow rate
(kg/h)
21.5
25.5
29.6
30.0
34.4
38.7
47.4
54.0
60.5
60.4
68.3
68.3
77.3
86.4
Burner
head
LD2
LD2
LD3
LD3
LD3
LD3
LD3A
LD3A
LD3A
K/KA
K/KA
C/KA
C/KA
C/KA
Heat Output Net Heat Input
Net
eff **
(%)
*
*
*
(Btu/h)
50/70
70/90
90/140
140/160
160/200
*
*
8
Multi Pass Oil Boilers
2 - BOILER TECHNICAL INFORMATION
Gas Oil Notes:
1 The data given above is approximate only.
2 The above settings may have to be adjusted on site for the correct operation of the burner.
3 Gas Oil is not suitable for use with low level balanced flue models, unless the flue terminal is higher than 2.0 m above
outside ground level.
4 The installer must amend the boiler data label if the type of fuel or nozzle used is changed.
5 The net flue gas temperatures given above are ± 10%.
6 The 70/90 and 90/140 models use Riello RDB burners. The 140/160 and 160/200 models use EOGB Sterling 90 burners.
7 * Net thermal efficiency (BSRIA).
8 ** Flue gas temperatures taken at combustion door test point will be approximately 25°C higher.
(kW)
20.5
23.5
26.4
32.2
41.0
41.0
47.0
47.0
52.8
58.6
Model
(Btu/h)
70 000
80 000
90 000
110 000
140 000
140 000
160 000
160 000
180 000
200 000
94.6
94.7
94.6
94.1
94.3
(Btu/h)
76 900
87 900
98 900
116 745
148 470
148 768
170 606
170 606
191 079
212 575
(kW)
22.5
25.8
29.0
34.2
43.5
43.6
50.0
50.0
56.0
62.3
Nozzle
0.50/60°S
0.55/60°S
0.60/60°S
0.75/60°S
1.00/60°S
0.85/60°S
0.85/60°S
0.85/60°S
1.10/60°S
1.10/60°S
Oil
press.
(bar)
11.00
12.00
12.00
10.75
9.80
16.50
20.00
20.00
15.00
16.50
Smoke
No.
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
Fuel flow
rate
(kg/h)
1.57
1.80
1.97
2.30
2.97
2.97
3.48
3.95
4.47
4.98
Flue gas
temp.**
(°C)
200
200
200
185
184
185
195
195
195
200
CO
2
(%)
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
Flue gas mass
flow rate
(kg/h)
30.0
34.4
38.7
47.4
60.5
60.2
68.8
68.8
76.9
85.9
Burner
head
LD3
LD3
LD3
LD3A
LD3A
K/KA
K/KA
K/KA
C/KA
C/KA
Heat Output Net Heat Input
Net
eff *
(%)
(Btu/h)
70/90
90/140
140/160
160/200
Multi Pass oil boilers using Class D gas oil
2.3
9
Multi Pass Oil Boilers
70/90
90/140
140/160
160/200
50/70
70/90
140/160
160/200
Fig. 1
Boiler House models
1080
410
410 690
120
125
170
200
499
650
160
1803654
ABCDEFGH
Model
(Kitchen)
Dimension (mm)
860 605
ABC EFG
Model
(Boiler House)
Dimension (mm)
720
895
460
460
445
480
625
655
D
H
65
68
499
650
145
135
160
185
1000
550 580 765 145 700 240 70
1196
530 835 148 175 700 245 75
2 - BOILER TECHNICAL INFORMATION
Boiler dimensions
2.4
See Fig. 1
Kitchen models
90/140
10
Multi Pass Oil Boilers
The Multi Pass range of automatic pressure jet oil boilers have
been designed for use with a central heating system with indirect
domestic hot water cylinder. They are not suitable for use with
either a direct cylinder or a 'primatic' cylinder.
The boilers are suitable for use on sealed central
heating systems.
Five Kitchen models are available and are listed below
together with their maximum outputs.
50/70 20.5 kW (70 000 Btu/h)
70/90 26.4 kW (90 000 Btu/h)
90/140 41.0 kW (140 000 Btu/h)
140/160 46.6 kW (160 000 Btu/h)
160/200 59.0 kW (200 000 Btu/h)
Four blue cased Boiler House models are available and
are listed below together with their maximum outputs.
70/90 26.4 kW (90 000 Btu/h)
90/140 41.0 kW (140 000 Btu/h)
140/160 46.6 kW (160 000 Btu/h)
160/200 59.0 kW (200 000 Btu/h)
All models (except the 70/90 and 90/140) are despatched
pre-set at their maximum output and for use with kerosene.
The 70/90 and 90/140 are pre-set to mid range output.
The boilers are supplied as Conventional flue models, if a
Balanced flue version is ordered, a Balanced Flue Kit is
required. The following flue kits are available from Grant
UK. Refer to Sections 4.8 and 4.9 for further details.
Yellow system - Standard low level concentric balanced flue
Short low level concentric balanced flue
225 mm, 450 mm and 675 mm extensions
90° extension elbow
45° extension elbow
45° elbow
Green system - Standard external high level/vertical flue
starter kit (room sealed)
Short external high level/vertical flue starter
kit (room sealed)
150 mm, 250 mm 450 mm and 950 mm extensions
195 - 270 mm adjustable extension
45° elbow
High level terminal
Vertical terminal
White system - High level concentric balanced flue kit
225 mm, 450 mm and 950 mm extensions
275 - 450 mm adjustable extension
45° elbow
Vertical concentric balanced flue kit
225 mm, 450 mm and 950 mm extensions
275 - 450 mm adjustable extension
45° elbow
3 - GENERAL BOILER INFORMATION
Boiler description
3.1
Kitchen boilers are supplied with the control panel and
burner factory fitted. The burners for Boiler House
models are supplied in a separate carton. A burner
supply cable is supplied pre-wired to all burners.
All burners are pre-set for use with kerosene and are
supplied ready to connect to a single pipe fuel supply
system with a loose flexible fuel line (600 mm) and 3/8"
to 1/4" BSP male adaptor supplied with the boiler. If
required, an additional flexible fuel line (600 mm) and
3
/8" to 1/4" BSP male adaptor are available from Grant
Engineering (UK) Limited, for two-pipe oil supply
systems.
All models are suitable for use with Class C2 kerosene
to BS 2869:1998.
All models, except the 50/70, are also suitable for use
with Class D gas oil to BS 2869:1998.
Note: Only Kerosene may be used with low level
balanced flues, unless the flue terminal is higher
than 2.0 m above outside ground level.
If the fuel to be used is Gas Oil or the boiler output is
to be changed, it may be necessary to change the
burner nozzle, head and baffle settings. Refer to the
Technical Information in Sections 2.2 and 2.3. To
change the nozzle on Kitchen models, remove the
burner from the boiler then remove the nozzle as
described in Section 7.4. For Boiler House models,
unpack the burner and remove the nozzle as described
in Section 7.4. To remove the baffles refer to Sections
7.2 and 7.3, then refer to Figs. 30 to 34 for baffle
settings. The installer must amend the boiler data label
accordingly.
The temperature of the water leaving the boiler to heat
the radiators and hot water cylinder is User adjustable
from 65 to 85°C.
The boiler is fitted with an overheat thermostat (which
allows it to be used on a sealed central heating system)
which will automatically switch off the boiler if the heat
exchanger exceeds a pre-set temperature of 111°C ± 3°C.
For Kitchen models the control panel is fitted with an
ON/OFF switch, boiler thermostat control knob and
the manual reset button for the overheat thermostat. An
optional plug-in programmer is available which allows
the User to set the operating times for central heating
and hot water, (plug-in programmer not available for
140/160 and 160/200 models).
For Boiler House models a combined boiler and
overheat thermostat is fitted with a boiler thermostat
control knob and the manual reset button for the
overheat thermostat.
11
Multi Pass Oil Boilers
The boiler casing door is factory fitted with the hinges
on the left hand side. If required, the door may be
hinged on the right hand side as follows:Remove the hinge pin from the top of the door and the
bottom hinge bracket. Refit them to the other side of
the door and boiler casing. Adjust the bottom bracket
until the door is correctly aligned.
Installation of a MultiPass boiler must be in
accordance with the following recommendations:-
a Building Regulations for England and Wales,
and the Building Standards for Scotland issued
by the Department of the Environment and any
local Byelaws etc.
b Model and local Water Undertaking Byelaws.
c Applicable Control of Pollution Regulations.
d The following OFTEC requirements:-
OFST 100 Polythene oil storage tanks for
distillate fuels.
OFST 200 Fuel oil storage tanks and tank
bunds for use with distillate fuels,
lubrication oils and waste oils.
Further information may be obtained from the
OFTEC Technical Information Book 3
(Installation requirements for oil fired boilers
and oil storage tanks).
3 - GENERAL BOILER INFORMATION
Regulations to comply with
3.2
Regional statutory requirements may deem this appliance to be a 'controlled service'.
Where this is the case, it is a legal requirement that the appliance is installed and
commissioned either under the remit of building control or by a 'Competent person' such
as a suitably qualified Oftec registered technician.
The installation should also be in accordance with the
latest edition of the following British Standard Codes
of Practice:-
BS 715 Metal flue pipes, fittings, terminals
and accessories.
BS 799:5 Oil storage tanks.
BS 1181 Clay flue linings and flue terminals.
BS 4543:3 Factory made insulated chimneys for
oil fired appliances.
BS 4876 Performance requirements for oil
burning appliances.
BS 5410:1 Code of Practice for oil firing appliances.
BS 5449 Forced circulation hot water systems.
BS 7593 Code of Practice for treatment of
water in heating systems.
BS 7671 Requirements for electrical
installations, IEE Wiring Regulations.
Failure to install and commission appliances
correctly may invalidate the boiler warranty.
IMPORTANT
Before starting any work on the boiler, or fuel supply
please read the health and safety information given in
Section 11 on page 50.
12
Multi Pass Oil Boilers
3.3.1 Fuel storage
A painted (outside only) storage tank must be
constructed to BS 799:5:1987 and OFST 200 and
should include the following:-
a A fuel level gauge (not a glass type).
b A vent pipe incorporating a weatherproof
termination (bend or cap) of a diameter not less
than the filling pipe.
c A sludge valve.
d An outlet valve at the opposite end of the tank
to the sludge valve.
The tank should be positioned in accordance with the
recommendations given in BS 5410:1:1997, which
gives details of filling, maintenance and protection
from fire.
The tank should be suitably supported so as to obtain a
slope of 20 mm per metre towards the sludge valve.
A galvanised tank must not be used.
A plastic tank may be used and must comply with
OFS T100.
Note: Plastic tanks should be adequately and
uniformly supported on a smooth level surface, across
their entire base area.
3.3.2 Fuel pipes
1 Fuel supply pipes should be of copper tubing with
an internal diameter of at least 8 mm.
Galvanised pipe must not be used.
2 Flexible pipes must not be used outside the boiler
case.
3 A remote sensing fire valve must be installed in the
fuel supply line (outside) where it enters the
building, with the sensing head located above the
burner. Recommendations are given in BS
5410:1:1997.
4 A metal bowl type filter with a replaceable
micronic filter must be fitted in the fuel supply line.
A shut-off valve should be fitted before the filter,
to allow the filter to be serviced.
5 A flexible fuel line, adaptor and 1/4" BSP isolation
valve are supplied loose with the boiler for the final
connection to the burner. If a two pipe system or Tiger
Loop system is used, an additional flexible fuel line
(600 mm) and 3/8" to 1/4" BSP male adaptor are
available from Grant Engineering (UK) Limited.
3 - GENERAL BOILER INFORMATION
6 Flexible pipes should be inspected annually when
the boiler is serviced and replaced every two years.
7 The use of a 'Tankmaster' and Tiger Loop is an
ideal way of delivering an oil supply to the boiler.
The Tankmaster unit, fitted to the storage tank,
includes a filter, sight tube, shut-off valve and fire
valve. A separate fire valve is required in the fuel
line (outside) where it enters the building
containing the boiler. See Fig. 4.
3.3.3 Single pipe system - (See Fig. 2)
1 Where the storage tank outlet is above the burner
the single pipe system should be used. The height
of the tank above the burner limits the length of
pipe run from the tank to the burner.
2 As supplied the burner is suitable for a single pipe
system.
3.3.4 Two pipe system - (See Fig. 3)
1 When the storage tank outlet is below the burner,
the two pipe system should be used. The pipe runs
should be as shown in Fig. 3. The return pipe
should be at the same level in the tank as the
supply pipe, both being 75 to 100 mm above the
base of the tank. The pipe ends should be a
sufficient distance apart so as to prevent any
sediment disturbed by the return entering the
supply pipe.
2 Avoid the bottom of the tank being more than 3 m
below the burner.
3 A non-return valve should be fitted in the supply
pipe together with the filter and fire valve. A nonreturn valve should be fitted in the return pipe if
the top of the tank is above the burner.
4 To be used with a two-pipe system, the burner
must be fitted with an additional flexible fuel line
(a flexible fuel line (600 mm) and 3/8" to 1/4" BSP
male adaptor are available from Grant Engineering
(UK) Limited). See Section 3.3.6.
5 The pump vacuum should not exceed 0.4 bar.
Beyond this limit gas is released from the oil.
For guidance on installation of top outlet fuel tanks and
suction oil supply sizing, see OFTEC booklet T1/139.
Available at www.oftec.org.uk
Fuel supply
3.3
13
Multi Pass Oil Boilers
3 - GENERAL BOILER INFORMATION
Fig. 3 - Two pipe system
Fig. 2 - Single pipe system
14
Multi Pass Oil Boilers
3.3.5 Tiger Loop system - (See Figs. 4 and 5)
1 When The storage tank is below the burner, an
alternative to a two pipe system can be achieved using
the Tiger Loop oil deaerator. This effectively removes
the air from the oil supply on a single pipe lift.
2 The Tiger Loop is connected close to the boiler as
a two pipe system (omitting the non-return valve)
as shown in Fig. 4. Refer to the manufacturers
instructions supplied with the Tiger Loop.
The Tiger Loop must be mounted vertically.
Note: To prevent any possibility of fuel fumes
entering the building, the Tiger Loop must be
fitted outside.
3 To be used with a Tiger Loop system, the burner
must be fitted with an additional flexible fuel line
(a flexible fuel line (600 mm) and 3/8" to 1/4" BSP
male adaptor are available from Grant Engineering
(UK) Limited). See Section 3.3.6.
1/4" BSP female
connections
Tiger Loop
SUPPLY
TO PUMP
RETURN
FROM PUMP
SUPPLY
FROM TANK
Fig. 5 - Tiger loop
Fig. 4 - Tiger loop system
3 - GENERAL BOILER INFORMATION
15
Multi Pass Oil Boilers
Fig. 6 - Riello RDB pump
1 Oil inlet connection
2 Return connection
3 By-pass screw
4 Pressure gauge connection
1
2
3
4
5
6
7
8
3.3.6 Two pipe oil supplies
Riello RDB burner - See Fig. 6
1 The fuel pump is supplied for use with a single
pipe fuel supply system. For use on a two pipe
system, it is necessary to fit the By-pass screw (see
Fig. 6) into the tapping in the return port.
2 The By-pass screw is supplied in the boiler
accessory pack.
3 Remove the plastic burner cover (two screws). To
gain access on Kitchen models, it may be necessary
to remove the grey plinth - loosen the screw
securing the right hand side of the plinth, then
withdraw the plinth forward from the right and
away from the case.
4 Remove and discard the blanking plug from the
return connection of the pump and fit the By-pass
screw using an hexagonal key.
5 Connect the return oil flexible fuel line to the pump.
6 Connect the 3/8" to 1/4" BSP adaptor to the flexible
fuel line.
7 Flexible fuel lines and adaptors are available from
Grant Engineering (UK) Ltd.
8 Boiler House models - Fit the burner as described
in Section 4.6.
Fig. 7 Danfoss pump
Pump end
cover
'U'
shaped
washer
Fig. 8 Danfoss BFP11 L3 pump
1 Supply to nozzle
2 Pressure gauge port
3 Pressure adjustment, 4 mm allen key
4 Vacuum gauge port
5 Return connection
6 Inlet connection
7 Changeover screw
1
2
3
4
5
6
7
EOGB Sterling 90 burner - See Figs. 7 and 8
1 Remove the four screws securing the pump end
cover and remove the filter.
2 Remove the lower cover plate fixing screw
(changeover screw) and discard the 'U' shaped
washer (see Fig. 7). Replace the screw.
3 Replace the filter and pump end cover, ensure the
'O' ring is in position.
4 Remove and discard the return pipe connection
blanking plug from the pump (see Fig. 8) and
connect the elbow of the flexible fuel pipe supplied
with the burner.
5 Connect the flexible pipe to the rigid fuel return pipe.
3 - GENERAL BOILER INFORMATION
5 Pressure adjuster
6 Vacuum gauge connection
7 Solenoid
8 Supply to nozzle
16
Multi Pass Oil Boilers
Air supply
3.5
Fig. 9 - Air supply for room sealed balanced flue boilers
3 - GENERAL BOILER INFORMATION
Electricity supply
3.4
1 A 230/240 V ~ 50 Hz mains supply is required.
The boiler must be earthed.
2 The supply must be fused at 5 Amp and there must
only be one common isolator for the boiler and
control system, providing complete electrical
isolation.
3 A fused double pole switch or a fused three pin
plug and shuttered outlet socket should be used for
the connection.
4 The power supply cable should be at least 0.75 mm²
PVC as specified in BS 6500, Table 16.
5 All the wiring external to the boiler must be in
accordance with the current I.E.E. Wiring
Regulations.
6 Any room thermostat or frost thermostat used must
be suitable for use on mains voltage.
7 In the event of an electrical fault after installation
of the boiler, the following electrical system checks
must be carried out:- Short circuit, Polarity, Earth
continuity and Resistance to earth.
See Figs. 9 and 10
A sufficient permanent air supply to the boiler should
be provided:
a For proper combustion of fuel and effective
discharge of combustion products to the open air.
b For the ventilation of any confined space in
which the boiler is installed to prevent
overheating of the boiler any equipment in and
near the boiler.
c For the satisfactory operation of any draught
stabiliser which may be fitted.
It should be both the designer's and installer's concern
that the air required for these functions be introduced
so as to cause as little discomfort as possible to the
building occupants and thus to offer them the least
temptation to obstruct the ventilators.
Further details may be obtained from BS 5410:1:1997.
Notes:
For a boiler fitted in a compartment, which is
ventilated as shown, no additional allowance is
necessary.
Open flue - Extract fans, where needed, should
be in accordance with Section 4.4.7 in BS 5410
Part 1 1997.
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