Grant 70/90 User, Installation And Servicing Instructions

Brand: Grant

Model: 70/90

Category: Water heaters & boilers

Type: User, Installation And Servicing Instructions

This manual is also suitable for

EUROFLAME 50/90

USER, INSTALLATION

and

SERVICING INSTRUCTIONS

EUROFLAME

For use with Kerosene or Gas Oil

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

Part No. DOC 01 Rev. 15 February 2004

Kitchen/Utility and Boiler House Models

50/70, 70/90, 90/120 and

Kitchen/Utility System Models

50/90, 90/120

GRANT

2Euroflame Oil Boilers

Subject PageSection

1 User instructions ........................................ 3

2 Technical information................................ 6

3 General boiler information......................... 10

4 Boiler installation ...................................... 23

5 Commissioning ......................................... 29

6 Information for the user ............................. 31

7 Boiler servicing ......................................... 31

8 Wiring diagrams ........................................ 34

9 Fault finding .............................................. 37

10 Burner spares ............................................ 39

11 Health and safety information .................... 40

12 EC declaration of conformity..................... 41

LIST OF CONTENTS

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 appliance is installed, commissioned and serviced by a 'Competent person' such as a suitably

qualified Oftec registered technician.

COMMISSIONING REPORT

SERVICE LOG

Euroflame Oil Boilers

The boiler will provide domestic hot water and central

heating and is fully automatic once switched on. An

illuminated On/Off switch, see Fig. A, is fitted to the

Euroflame Kitchen/Utility model, which lights when the

boiler is switched on, but does not necessarily indicate the

burner is firing.

To access the Kitchen/Utility model controls, pull the

front panel off (push-on fixings).

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/Utility models, the neon in the switch is

not alight). The room thermostat (if fitted) is at the

desired setting. The boiler thermostat is set to the

required setting (see section 1.7).

2Switch on the electricity supply to the boiler.

Note: Boiler House models will light at this stage.

3For Kitchen/Utility models, set the On/Off switch to

ON. A neon in the switch lights when it is in the on

position.

The boiler will now light automatically.

1 - USER INSTRUCTIONS

About your boiler

1.1

Boiler controls (see Fig. A or B)

1.2

Lighting your boiler (see Fig. A or B)

1.3

Controls for Euroflame Kitchen/Utility models - Fig. A

°C

Boiler

thermostat

Overheat thermostat

reset button

(under plastic cap)

Controls for Boiler House models - Fig. B

4Euroflame Oil Boilers

Kitchen/Utility models for short periods - Set the On/

Off to OFF.

To restart, simply set the switch to ON.

Kitchen/Utility 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

previously.

1Check that the boiler On/Off switch is ON.

2Check that any remote programmer (if fitted) is

working and is in an 'on' period.

3Check that all thermostats are set to the desired setting

and are calling for heat.

4Check 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.

5Ensure that a fuse has not blown or that the electricity

supply has not failed.

6Check 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.

Euroflame boilers will operate on either Class C2 Kerosene

or Class D Gas Oil. 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.

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. 30a or 30b),

press the button then replace the cap.

If this condition continually repeats, contact your

Service engineer.

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

Euroflame Oil Boilers

4 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.

5 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.

6 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.

7 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.

8 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 (Multi Pass 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. Re-pressurise 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 will 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

6Euroflame Oil Boilers

50/70

3.1

55 (bh), 76 (ku)

121 (bh), 167 (ku)

22.8 (bh), 22.0 (ku)

77 794 (bh), 75 067 (Ku)

1" BSP

3 bar

N/A

Model

Water content litre

gal

* Weight (dry) kg

Max. heat input (Kerosene) kW

Btu/h

Flow (F) and return (R) connections

Flue size (conventional)

Waterside resistance

Flow/Return temp. difference of 10°C

Flow/Return temp. difference 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

Max. heating system volume

Expansion vessel (pre-charged 1 bar)

*Weight includes burner but excludes flue

Boiler technical data

2.1

2 - BOILER TECHNICAL INFORMATION

70/90

4.6

100 (bh), 109 (ku)

220 (bh), 240 (ku)

28.8 (bh), 28.3 (ku)

98 269 (bh), 96 563 (ku)

1" BSP

3 bar

N/A

90/120

4.8

112 (bh), 121 (ku)

232 (bh), 252 (ku)

38.0

129 600

1¼" BSP

125 mm (5 in) dia.

3 bar

N/A

50/90 System

4.6

117

258

28.3

96 563

22mm (F) 1"BSP (R)

3 bar

157 litre

12 litre

90/120 System

4.8

129

284

38.0

129 600

28mm (F) 1¼" BSP (R)

125mm (5 in) dia.

3 bar

157 litre

12 litre

100 mm (4 in) diameter

(bh=Boiler House, ku=Kitchen/Utility)

26.5 mbar

9.5 mbar

28 m

65 to 85°C (60 to 90°C - Boiler House models)

111°C ± 3°C

Less than 50°C

230/240 V ~ 50 Hz Fused at 5 Amp

90 W max.

2.60 Amp

0.85 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

Euroflame Oil Boilers

(kW)

14.7

17.6

20.5

23.5

26.4

14.7

17.6

20.5

23.5

26.4

32.2

35.2

Notes:

1 The data given above is approximate only. The Kerosene table 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 balanced flue.

4 The installer must amend the boiler data label if the type of fuel or nozzle used is changed.

5 When commissioning, or when the output or fuel is changed, the air damper must be adjusted to obtain the correct CO2 level.

6 Boiler House models: When used with a balanced flue, the air intake grille on the burner must be replaced with the air intake

spigot supplied with the flue kit. The air intake hose must be attached to the burner spigot using the clip supplied.

7 50/90 System boiler: It is necessary to adjust the top baffle plate and exchange the burner head when setting the boiler to

50 000 or 60 000 Btu/h output.

8 Net flue gas temperatures given are ± 10%.

9* Indicates the factory set output.

10 ** Net thermal efficiency (BSRIA).

Model

(Btu/h)

50 000

60 000

70 000

80 000

90 000

50 000

60 000

70 000

80 000

90 000

110 000

120 000

Utility

93.0

93.2

92.0

B/House

90.0

91.8

N/A

90.9

(Btu/h)

54 900

65 900

76 900

87 900

98 900

54 900

65 900

76 900

87 900

98 900

96 700

119 400

129 600

(kW)

16.1

19.3

22.5

25.8

29.0

16.1

19.3

22.5

25.8

29.0

28.7

35.0

38.0

Nozzle

0.50/60°EH

0.60/60°EH

0.75/60°EH

0.50/60°EH

0.60/60°EH

0.75/60°EH

0.75/80°H

1.00/80°H

Oil

press.

(bar)

7.00

8.50

7.00

9.50

7.00

8.50

7.00

9.50

8.00

8.60

Smoke

No.

0 - 1

Fuel flow

rate

(kg/h)

1.33

1.60

1.87

2.13

2.40

1.33

1.60

1.87

2.13

2.40

2.38

2.62

3.12

Flue gas

temp.

(°C)

211

180

190

220

225

CO2

(%)

11.5

12.0

Top

baffle

position

N/A

Left

Right

Left

N/A

Burner

head

LD2SX short

LD3

LD2

LD3

LD3A

50/70

Riello RDB

50/90

Riello RDB

70/90

Riello RDB

Heat Output Net Heat Input

Net efficiency **

(%)

Note: All boilers are despatched for use with kerosene.

Euroflame oil boilers using Class C2 kerosene

2.2

Euroflame oil boilers using Class D gas oil

2.3

2 - BOILER TECHNICAL INFORMATION

B/House

90.0

91.8

N/A

90.9

Model

(kW)

20.5

26.4

35.2

(Btu/h)

70 000

90 000

120 000

Utility

93.0

93.2

92.0

(Btu/h)

76 900

98 900

130 400

(kW)

22.5

29.0

38.2

Nozzle

0.40/60°S

0.60/60°S

0.75/80°S

Oil

press.

(bar)

12.00

12.50

Smoke

No.

0 - 1

Fuel flow

rate

(kg/h)

1.60

1.97

3.20

Flue gas

temp.

(°C)

200

220

CO2

(%)

11.5

12.0

Top

baffle

position

N/A

Left

N/A

Burner

head

LD2SX short

LD3

LD3A

Net efficiency **

(%)

70/90

Riello RDB

50/70

Riello RDB

50/90

Riello RDB

Heat Output Net Heat Input

90/120

Riello RDB2 *

90/120

Riello RDB2

8Euroflame Oil Boilers

Fig. 1a - 50/70

Boiler dimensions

2.4

2 - BOILER TECHNICAL INFORMATION

See Figs. 1a and 1b

Euroflame Oil Boilers

Fig. 1b - 70/90, 50/90, 90/120

2 - BOILER TECHNICAL INFORMATION

10 Euroflame Oil Boilers

The Euroflame 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 also suitable for use on sealed central

heating systems.

There are five versions of the Euroflame available, the

50/70, 50/90 System, 70/90, 90/120 and 90/120

System. The 50/70, 70/90 and 90/120 can be supplied

as Kitchen/Utility or uncased Boiler House models.

The 50/70 can be adjusted to a maximum output of

20.5 kW (70 000 Btu/h), the 50/90 System 26.4 kW

(90 000 Btu/h), the 70/90 26.4 kW (90 000 Btu/h) and

the 90/120 35 kW (120 000 Btu/h).

The boilers are supplied as Conventional flue models,

if a Balanced flue version is ordered, a Balanced Flue

Kit is required. Kits available include:- Concentric Low

Level Balanced Flue, Square Low Level Balanced Flue

(Short, Standard, Long and Extra Long) and Concentric

High Level Balanced Flue, all suitable for left, right or

rear outlet and a Vertical Concentric Balanced Flue.

Kitchen/Utility models are supplied with the 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.

The 50/90 and 90/120 Kitchen/Utility System boilers

are sealed system versions of the standard Euroflame

Kitchen/Utility boilers. They are supplied factory

fitted with a complete sealed system kit incorporating

a 12 litre expansion vessel, automatic air vent,

pressure relief safety valve assembly, pressure gauge

and filling loop. A circulating pump and isolating

valves are also fitted. Both the pump and burner are

pre-wired for ease of installation.

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

(900 mm) and 3/8" to 1/4" BSP male adaptor

supplied with the boiler. If required, an

additional flexible fuel line (900 mm) and 3/8" to

1/4" BSP male adaptor are available from Grant

Engineering (UK) Limited, for two-pipe oil

supply system.

All models are suitable for use with Class C2 kerosene

or Class D gas oil. See sections 2.2 and 2.3.

Note: Only Kerosene may be used with Low Level

Balanced flues.

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, burner head and top baffle plate

position (50/90 only). Refer to the Technical

Information in sections 2.2 and 2.3.

To change the nozzle on a Kitchen/Utility model,

remove the burner from the boiler then remove the

burner head/nozzle as described in section 7.4. For a

Boiler House model, unpack the burner and remove

the burner head/nozzle as described in section 7.4. To

remove and adjust the 50/90 top baffle plate refer to

section 7.3. 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 on Kitchen/Utility models and 60 to

90°C on Boiler House models.

The boilers are fitted with an overheat thermostat

(allowing them to be used on sealed central heating

systems) which will automatically switch off the boiler

if the heat exchanger exceeds a pre-set temperature of

111°C ± 3°C.

The control panel fitted to the Kitchen/Utility and

System models has an On/Off switch (with neon

indicator light), boiler thermostat control knob and the

manual reset button for the overheat thermostat. The

System models also have a system pressure gauge.

Both Boiler House models are supplied with a

combined boiler and overheat thermostat with a boiler

thermostat control knob and the manual reset button

for the overheat thermostat.

Boiler description

3.1

3 - GENERAL BOILER INFORMATION

Euroflame Oil Boilers

Installation of a Euroflame 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).

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 40.

Kitchen/Utility Conventional flue models are supplied

in one pack, containing the cased boiler with the

burner and control panel fitted, and literature pack.

Kitchen/Utility Balanced flue models are supplied in

two packs, containing the following:-

Carton 1 The cased boiler with burner and control

panel fitted, and literature pack.

Carton 2 The balanced flue kit - low, high level or

vertical, as ordered. A terminal guard is

supplied with a low level flue kit.

Boiler House Conventional flue models are supplied in

two packs, containing the following:-

Carton 1 The boiler with literature pack, but

without burner.

Carton 2 The burner with the combined boiler and

overheat thermostat.

Boiler House Balanced flue models are supplied in

three packs as follows:-

Carton 1 The boiler with literature pack, but

without burner.

Carton 2 The burner with the combined boiler and

overheat thermostat.

Carton 3 The balanced flue kit - low level, high level

or vertical as ordered. A terminal guard is

supplied with a low level flue kit.

The following flue kits are available, refer to section

3.8 for further details.

a Low level concentric balanced flue.

b Low level concentric balanced flue extensions,

225 mm, 450 mm and 675 mm.

c 90° concentric bend.

d High level balanced flue.

e High level balanced flue extensions.

f Low level balanced flue - square.

(Short, Standard, Long or Extra Long)

g Vertical balanced flue.

h Vertical balanced flue extensions.

i 45° elbows for high level and vertical balanced flues.

Regulations to comply with

3.2

3 - GENERAL BOILER INFORMATION

Delivery

3.3

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.

12 Euroflame Oil Boilers

3.4.1 Fuel storage

A painted (outside only) storage tank must be

constructed to BS 799:5:1987 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.

3.4.2 Fuel pipes

1 Fuel supply pipes should be of copper tubing with

an internal diameter of at least 8 mm.

Soldered joints should not be used.

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

adjacent to the boiler. 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

(900 mm) and 3/8" to 1/4" BSP male adaptor are

available from Grant Engineering (UK) Limited.

6 Flexible fuel lines 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.

3.4.3 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.

3.4.4 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. The

return pipe must be unrestricted.

4 To be used with a two-pipe system, the burner

must be fitted with an additional flexible fuel line

(a flexible fuel line (900 mm) and 3/8" to 1/4" BSP

male adaptor are available from Grant Engineering

(UK) Limited). See section 3.4.6.

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

3 - GENERAL BOILER INFORMATION

Fuel supply

3.4

Euroflame Oil Boilers

3 - GENERAL BOILER INFORMATION

Fig. 3 - Two pipe system

Fig. 2 - Single pipe system

14 Euroflame Oil Boilers

3.4.5 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 - GENERAL BOILER INFORMATION

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 To be used with a Tiger Loop system, the burner

must be fitted with an additional flexible fuel line

(a flexible fuel line (900 mm) and 3/8" to 1/4" BSP

male adaptor are available from Grant Engineering

(UK) Limited). See section 3.4.6.

Euroflame Oil Boilers

3 - GENERAL BOILER INFORMATION

Electricity supply

3.5

Fig. 6 - Riello RDB pump

1 Oil inlet connection

2 Return connection

3 By-pass screw

4 Pressure gauge connection

5 Pressure adjuster

6 Vacuum gauge connection

7 Solenoid

8 Supply to nozzle

3.4.6 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.

8Boiler House models - Fit the burner as described in

section 4.6.

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, and it must provide 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. 7 and 8

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.

Air supply

3.6

16 Euroflame Oil Boilers

Fig. 8 - Combustion and ventilation air supply for conventional flue boilers

3 - GENERAL BOILER INFORMATION

Fig. 7 - Air supply for room sealed balanced flue boilers

Note: If the boiler is in a compartment, this must be added to the areas required for ventilation.

Minimum size of air vents required - see Figs. 7 and 8

Vent A

Vent B

Vent C

Vent D

Vent E

50/70

113 cm² (18 in²)

226 cm² (36 in²)

85 cm² (13 in²)

226 cm² (36 in²)

338 cm² (52 in²)

50/90, 70/90

145 cm² (23 in²)

290 cm² (46 in²)

118 cm² (18 in²)

290 cm² (46 in²)

436 cm² (68 in²)

90/120

194 cm² (30 in²)

388 cm² (60 in²)

166 cm² (26 in²)

388 cm² (60 in²)

580 cm² (90 in²)

Euroflame Oil Boilers

See Figs. 9 and 10

Grant boilers have high operating efficiencies. Care

must be taken to ensure the flue system is suitable for

the low flue gas temperatures.

1 An insulated flue terminating in a down draught

free area, i.e. at least 600 mm above the point of

exit through the roof or preferably above the ridge

level, will normally provide the necessary draught

of at least 8.7 N/m2 (0.035 in wg) as measured close

to the boiler connection. If a draught of 37 N/m2

(0.15 in wg) or more is measured, then a draught

stabiliser should be fitted in the flue.

2 The flue terminal must be at least 600 mm from

any opening into the building, and 600 mm above

any vertical structure or wall less than a horizontal

distance of 750 mm from the terminal. See Fig. 10.

3 If an existing chimney is used, it must be lined with

a stainless steel liner for use with fuel oil. The top

and bottom of the annular space must be sealed and

the void filled with a suitable insulating material to

reduce cooling of the flue gases.

4 If a rigid flue is used either internally or externally, it

must be of the twin wall type with a stainless steel

inner skin suitably insulated and weather proofed.

5The flue diameter must be as specified in

section 2.1 for the size of boiler in question.

6 The flue must be run upwards following as near a

vertical route as possible. Horizontal runs must be

avoided and no bends should have an angle of more than

45° from the vertical. There should be at least 600 mm

of vertical flue above the boiler before the first bend.

7 A sealed cleaning door must be provided near the

base of the flue.

8 The exposed flue pipe between the boiler and the

chimney must not be of an asbestos material and

aluminium must not be used in any part of the flue.

9 If the draught conditions are satisfactory, the flue

should terminate with a standard cowl suitable for

pressure jet oil boilers. Where the flue cannot

terminate above the ridge of the roof, use an 'OH'

or similar type cowl where downdraughting occurs.

Ridge vent terminals must not be used.

10 Refer to the locally applicable Building

Regulations, BS 5410:1 and OFTEC Installation

Requirements (Books 2 and 3) for further guidance

on conventional flue systems.

11 To allow for flue gas analysis and combustion

testing, a test point is provided in the cleaning

cover. Alternatively, a test hole can be drilled in

the flue pipe.

3 - GENERAL BOILER INFORMATION

Conventional flue system

3.7

Fig. 9 - Typical conventional flue with brick chimney

18 Euroflame Oil Boilers

Kitchen/Utility models

1 Lift off the two case top panels.

2 Remove the insulation from the smaller panel (do not

discard it) and remove knock-out.

3 Cut a clearance hole in the insulation.

4 Place the first section of the flue pipe through the

panel and locate it into the boiler flue socket.

5 Make good the connection using a suitable flexible

high temperature sealant (e.g. Silastic or similar)

and a rope seal and replace the insulation.

6 Fit the dress plate supplied, to the top panel.

Boiler House models

1 Position the flue pipe into the boiler flue socket.

2 Make good the connection using a suitable flexible

high temperature sealant (e.g. Silastic or similar)

and a rope seal.

1 Apart from a conventional flue/chimney, several

balanced flue options are available for use with the

Kitchen/Utility and Boiler House models.

aConcentric low level horizontal balanced flue -

available in Short and Standard kits. Extensions

are available which extend the flue by 225 mm,

450 mm or 675 mm.

90° and 45° extension elbows and a 45° elbow are

also available.

The maximum flue length with or without elbows

is 2 m.

bHigh level horizontal balanced flue - allows the

flue to rise between approximately 1.7 to 2.2 m

above floor level before exiting through the rear

or side wall. It is adjustable to suit the following

wall thicknesses:-

Rear 215 to 450 mm (approximately)

Side 120 to 350 mm (approximately)

Extension kits are available which extend the flue by

950 mm, 450 mm or 275 to 450 mm telescopic.

cA vertical balanced flue kit - adjustable to 3 m

(maximum 6 m with extensions).

Extension kits are available which extend the flue by

950 mm, 450 mm or 275 to 450 mm telescopic.

A choice of two waterproof flashings (flat or

pitched) and a wall bracket are also available.

3 - GENERAL BOILER INFORMATION

Connect a conventional flue

3.8

Balanced flue options

3.9

The wall thicknesses quoted above for side flue

assumes that the boiler will be spaced off the wall by a

nominal 20 mm (to provide clearance for the plugs for

the water connections). Water connections may be

taken from one side only, if required (see paragraph 2

in section 3.12).

To suit wall thickness (mm)

50/70 Boiler House

70/90 Boiler House

90/120 Boiler House

50/70 Kitchen/Utility

70/90 Kitchen/Utlity

50/90 System

90/120 Kitchen/Utility

90/120 System

50/70 Boiler House

70/90 Boiler House

90/120 Boiler House

50/70 Kitchen/Utility

70/90 Kitchen/Utlity

50/90 System

90/120 Kitchen/Utility

90/120 System

Rear exit Side exit

Short Kit Min. Max.Max. Min.

170

140

150

180

150

170

280

250

290

260

270

250

220

230

250

230

250

460

430

470

440

450

180

140

130

180

150

140

150

110

150

120

360

320

290

360

330

300

Concentric low level balanced

flue kits

Standard Kit

Euroflame Oil Boilers

2 The minimum clearances for positioning the flue

terminal are shown in Fig. 10.

3 If the lowest part of the flue terminal is fitted less than

2 m above a surface to which people have access, the

terminal must be protected by a guard. A suitable

guard is supplied with the Low level flue kit.

The guard must be fitted centrally over the flue

terminal and securely fixed to the wall.

3 - GENERAL BOILER INFORMATION

4The terminal should be positioned so as to avoid

products of combustion accumulating in

stagnant pockets around the building or

entering into buildings.

Fig. 10 - Clearances for Balanced flues

Notes: * 75 mm with protection.

** 300 mm British Standards

(600 mm recommended for high level balanced flue)

Distances measured to rim of terminal.

Clearances recommended by Grant Engineering

(UK) Limited in accordance with British

Standards and Building Regulations.

A Below a gutter or sanitary pipework

B Horizontal from an opening, air brick or window

C Above ground or balcony level

D Below eaves or balcony

E From an internal or external corner

F From a terminal facing the terminal

G From a surface facing the terminal

H Vertical from terminals on the same wall

I Horizontal from terminals on the same wall

J Below an opening, air brick, window etc.

K From vertical sanitary pipework

L Vertical flue from a wall

M From an oil storage tank

Min. distance (mm)Terminal position * 600

600

**300

*600

**300

1200

600

1500

750

600

300

600

1800

Notes: 1 An opening means an openable

element, such as an openable window,

or a permanent opening such as a

permanently open air vent.

2 Notwithstanding the dimensions

given, a terminal should be at least

300 mm from combustible material,

e.g. a window frame.

3 A way of providing protection of

combustible material would be to fit a

heat shield at least 750 mm wide.

When a low level concentric balanced flue is used, the

terminal guard must be fitted in all circumstances to

prevent objects entering the flue pipe.

20 Euroflame Oil Boilers

For additional protection of either the entire heating

system, or the boiler and localised pipework, it is

recommended that a frost thermostat be installed.

Refer to section 8 for connection details.

To protect the heating system the frost thermostat

should be sited within the house in such a place that it

can detect any rise and fall in the ambient air

temperature, i.e. in a room with a radiator.

Where the frost thermostat is installed outside the

house (to protect a boiler installed in an external boiler

room or garage) or in an attic, it is recommended that

it be used in conjunction with a pipe thermostat to

avoid unnecessary and wasteful overheating of the

property. The pipe thermostat should be located on the

boiler return pipe, and set to operate at 25°C. Refer to

section 8 for connection details.

1 The boiler must stand on a surface that is firm and

level. It does not require a special hearth as the

temperature of the boiler base is less than 50°C.

2 Sufficient clearance must be allowed around the

boiler for the following:-

Access above the boiler to remove the baffles for

servicing.

Access at the front of the boiler to remove the

burner.

3 If the boiler is to be installed with a side against a

wall, allow a nominal clearance of 20 mm for the

plugs for the water connections. Water connections

may be taken from one side only if required (see

section 3.12, paragraph 2).

Kitchen/Utility and Boiler House - See Fig. 11

1 A high level flow and low level return connection

are provided on each side of the boiler. See Fig. 1.

1" BSP connections are used on 50/70, 70/90

models and 1¼" on 90/120 models.

2 Flow and return connections should preferably be

diagonally opposed, i.e. to opposite sides of the

boiler. If the boiler is to be positioned against a

wall, the water connections may be taken from one

side only.

3 All models have a tapping (½" BSP) on the front

for the thermostat pocket, (pocket supplied loose

with Boiler House models).

4 All water connections have been temporarily sealed

with plastic caps to prevent any residual water

(from factory testing) leaking from the boiler

during transit. All the caps must be removed before

connecting any fittings.

Plug all unused connections.

5 Fit drain taps in the central heating and domestic

hot water systems to allow the complete system to

be fully drained.

6 Thoroughly flush the system before fitting the pump.

System boiler

The system pipework may exit the boiler from either the

left hand or right side of the boiler casing. See Fig. 1.

1 Fit any elbows, bushes etc. to the heating return

tapping at the bottom (1" BSP 50/90 or 1¼" BSP

90/120) before placing the boiler in position if

access is restricted. Do not forget to plug the

unused connection on the opposite side.

2 The heating flow pipe (22 mm 50/90 or 28 mm 90/120)

and 15 mm safety valve discharge pipe are provided

with pushfit Tectite elbows to enable quick and simple

installation. Orientate the elbows for left or right hand

connection. Ensure that the installation pipework is

pushed fully home into the elbows.

The 90/120 boiler is supplied with a 28mm flow pipe

factory fitted for left hand side exit. A 28mm push fit

Tectite elbow is provided for easy connection of the

heating system pipework.

If required, the flow pipe may exit through the right

hand side panel. The 28mm factory fitted flow pipe

must be turned 90° and routed across the boiler

behind the control panel.

Important: Care must be taken not to obstruct

the cleaning cover door on top of the boiler as

removal of the door and the boiler baffles will

not be possible.

3 The safety valve discharge pipe must be routed clear

of the boiler to the outside, to discharge in such a

manner that the discharge can be seen but cannot

cause injury or damage to persons or property.

4 The cold fill shut off valve should be fitted in an

accessible position close to the boiler to enable

connection of the temporary flexible filling loop to

the boiler.

3 - GENERAL BOILER INFORMATION

Frost protection

3.10

Boiler location

3.11

Water connections

3.12

Water connections

3.12a

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Grant 70/90 User, Installation And Servicing Instructions

Brand: Grant

Model: 70/90

Category: Water heaters & boilers

Type: User, Installation And Servicing Instructions

This manual is also suitable for

EUROFLAME 50/90

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Grant 70/90 User, Installation And Servicing Instructions

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Grant 70/90 User, Installation And Servicing Instructions

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