Heatline SARGON 18S, SARGON 30S, SARGON 24S, SARGON 20S Installation, Servicing And User Instructions Manual

SARGON 18S / 24S / 30S

PRE-MIX

CONDENSING

SYSTEM BOILER

Installation, Servicing
and User Instructions

Installation of the Condensate Waste Hose

IMPORTANT

The condensate trap bottom part should be fi lled with 50 cc. of water before
operating the boiler.

1. When the boiler is mounted push the plastic hose supplied all the way onto the
condensate outlet to the bottom left hand corner of the boiler as shown in the diagram.

2. Cut the plastic hose to desired length and fi t a plastic coupling to connect to your
plastic waste pipe.

NOTE: Removal of the condensate trap for cleaning purposes.

1. Pull off the plastic hose from the condensate trap.

2. Unscrew the bottom of the trap in an anti-clockwise direction by hand.

* The accessory for the condensate trap includes the hose.

Natural Gas

Heatline™ Sargon 18S / 24S / 30S Pre-mix Condensing System Boiler

British Gas Service Listing:

SARGON 18S G.C.No. 41-157-12
SARGON 24S G.C.No. 41-157-13
SARGON 30S G.C.No. 41-157-14

Notifi ed Body

IMQ 51BP2750 Directive 90/396/EEC

51BP2751DR Directive 92/42/EEC

The manufacturer, in the continuous process to improve his products, reserves the right to
modify the data expressed in the present documentation at any time and without prior notice.

The present documentation is an informative support and it cannot be considered as a
contract towards third parties.

The Heatline™ range of heating boiler
are manufactured from high quality
materials, enabling reliability and
optimum performance.

Heatline™ are committed to the
continual development of their
appliances to ensure their customers
benefi t from the latest advances in
combustion technology and energy
savings.

‘Benchmark’ Log Book, Boiler Registration & SEDBUK

As part of the industry-wide initiative the boiler comes complete with an Installation,
Commissioning and Service Record Log Book. Please read the Log book carefully and in
accordance with current legislation complete all sections relevant to the appliance and
installation. The details within the Log Book will be required in the event of any warranty work.

On completion the Log Book, which is found at the end of the Installation manual, must be left
with the end user and the relevant sections completed on each subsequent Service visit.

NOTE: You are also obliged to register the installation of this boiler with CORGI. Should you
wish to check the SEDBUK website for the rating of this boiler search under

DD HEATING or the boiler name and designation, e.g. SARGON 24S.

Contents

Section Page

Preface

1. Installation Regulations 3

2. Technical Data 4

3. Boiler Characteristics 6

4. Operation 6

5. General Installation 7

6. Appliance Sitting 9

7. Flue Terminal Location 10

8. Flue (General) 10

9. Electrical Connections 13
Wiring Diagram 14

10. Boiler Installation 15

11. Gas Supply 19

12. Filling the System 19

13. Control Panel Functions 20

14. Commissioning 23

15. Onboard Adjustments 24

16. Safety Devices 26

17. Routine Servicing 27

18. Component Replacement 30

19. Gas Type Conversion 37

20. Fault Finding Chart 38

Appendices
Appendix 1. Spare Parts List 41
Appendix 2. User Instructions 42
Appendix 3. Benchmark Logbook 48 -49

Preface

The Heatline™ Gas fi red combination boiler meets the requirements of Statutory
Instrument The Boiler (Effi ciency) Regulations’ and is deemed to meet the requirements of:

• Gas Appliance Directive 90/396/EEC

• Effi ciency Directive 92/42/EEC

• Low Voltage Directive 73/23 EEC (modifi ed from 93/68) and;

• Electromagnetic Compatibility Directive 89/396 EEC (modifi ed from 93/68)

Heatline™ declares that the materials used in the manufacturer of this appliance are
non-hazardous and that no substances harmful to health are contained within the appliance.

Heatline™ accepts no responsibility for the unsatisfactory performance of the appliance or
fl ue arising from the failure to comply with the installation and user instructions. Incorrect
installation could invalidate your guarantee and may lead to prosecution.

If the appliance is re-sold or installation transferred the appliance must be re-registered with
Heatline in order to maintain the warranty.

The boiler must be installed in accordance with these instructions and the regulations
currently in force. Read these instructions carefully before installing or using the appliance.

Manual Handling: When manoeuvring the boiler always use safe techniques – keep your back
straight, bend your knees, don’t twist, move your feet. Avoid bending forwards or sideways and
keep the load as close to your body as possible. Where possible transport the boiler using a
suitable trolley, sack truck or get some assistance. Grip the boiler fi rmly and before lifting
establish where the weight is concentrated to determine the centre of gravity, repositioning
yourself if necessary.

Handling

This apliance is heavy, truck if possible and obtain assistance if required.

To remove the appliance:

1. Carefully slit or remove the sealing tape being careful not to scratch the appliance door.

2. Fully open the carton lid and remove any instructions and components
3, Read the instructions carefully before installation
of appliance.

4. Roll the carton onto its open face.

5. Lift the carton free of the inner packaging.

6. Remove the mounting bracked and valve package.

7. Stands the boiler on its base within the styrene block
and remove the top packaging piece.

8. If you wish to remove the stryene base lie the appliance
on its back to do so.

Warnings

1

2

The sign of approval.

This is a fragile piece of equipment. Do not drop.

The packed appliances may be stacked fi ve high.

Do not crush the packaging as this may damage the appliance.

Store the appliance upright as indicated on the box.

The Signs on Box

Access, warnings and connections on the boiler The Signs on Boiler

230 V

Low Voltage Room Thermostat: This picture shows
the terminal block, which is located at the bottom left
hand side of the control panel cover, to which the room
thermostat must be fi tted.

NOTE: This is a voltage free connection and no mains
power must be applied to these terminals. For mains
powered thermostat connection, see section 9.5.

Warning High Voltage! This sign is located on the back
of the control box housing warning of high voltages within
the control box. Turn off and isolate the appliance before
removing this cover.

NOTE: Take care as there may be residual voltage within
some components.

LOW VOLTAGE ROOM THERMOSTAT – This picture shows the terminal block, which is located at the
left corner on the rear of the drop down control box. Note these terminals are not intended to drive the
thermostat but simply connect across the switch that opens and closes as the thermostat operates.
NOTE – This is a voltage free connection and no power (AC or DC) should be applied to these terminals.
For mains powered thermostats see section 9.5.

1.1. This appliance must be installed in accordance with the Rules in Force by a competent
person or registered CORGI. engineer in accordance with the Gas Safety (Installation and Use)
Regulations. Failure to install this appliance correctly may invalidate your guarantee.

1.2. Your CORGI. registered engineer should carry a C.O.R.G.I. ID card containing their
registration number, which should be recorded in your BENCHMARK Log Book, which is
supplied within the Instructions. You can check the validity of this ID number by contacting
CORGI. on 0870 401 2300.

1.3. This appliance must be installed in accordance with the Gas (Safety and Use)
Regulations, current Building Regulations, Building Standards (Scotland), I.S.813 Installation
of Gas Appliances (Ireland), IEE Wiring Regulations (BS 7671), Health and Safety Document
No. 635 (Electricity at Work Regulations) and Local Water Authority Bye Laws.

1.4. On installation the following British Standards must also be considered:

• BS 6798 Specifi cation for installation of gas fi red hot water boilers of rated input not
exceeding 70kW.

• BS 5449 Central heating for Domestic Premises.

• BS 5546 Installation of gas hot water supplies for domestic purposes.

• BS 5440 Flues and Ventilation for gas appliances of rated input not exceeding 70kW

(Part 1 Flues)

• BS 5440 Flues and Ventilation for gas appliances of rated input not exceeding 70kW
(Part 2 Air Supply)

• BS 6891 Installation of low pressure gas pipe-work installations up to 35mm (R1¼

).

1.5. Due to the manufacturer’s continuous improvement policy the manufacturer reserves
the right to change any specifi cation of the appliance or make modifi cations to these
instructions, which meet current regulations at the time of print. However, the instructions
must not be taken as overriding statutory requirements.

1.6. To ensure r

eliability and continued performance ensure that other components in
the system are also approved to relevant standards and that the appliance and system is
adequately protected and maintained on an annual basis.

For further information or advice contact Heatline™ Service & Technical Enquiries
in UK & IE on:

Service: 0870 777 8341
Spares: 0870 777 8402
Technical Help Line: 0870 777 8318
E–mail via our web site: www.heatline.co.uk.

1. Installation Regulations

3

2. Technical Data

SARGON 18S 24S 30S
Gas Category II 2 H 3+
Gas inlet pressure Natural Gas mbar 20 20 20
Gas inlet pressure Propane mbar 37 37 37
Heat Input (Qmax) (CH) kW 20.0 25 30.5
Heat Output (Pmax) (CH) kW 19.5 24.4 29.8
Heat Input (Qmin) (CH) kW 10.5 11.0 11.0
Heat Output (Pmin) (CH) kW 10.1 10.6 10.6
Useful effi ciency at 100% load % 97.5 97.5 97.6
Useful effi ciency at 30% load % 107.0 107.0 106.9
Gas Rate (Max) (NG) m³/h 2.12 2.54 3.18
Gas Rate (Max) (Propane) kg/h 1.57 1.97 2.4
Gas Rate (Min) (NG) m³/h 1.11 1.16 1.16
Gas Rate (Min) (Propane) kg/h 0.83 0.867 0.867
Power supply Input 230 V , 50 Hz
Gas Diaphragm (NG) mm 7.1 (white) 7.0 (white) 7.0 (white)
Gas Diaphragm (LPG) mm 5.4 5.4 5.4
Air Diaphragm (NG) colour Red
Air Diaphragm (LPG) colour Red
Max. power consumption Watts 175

Level of protection IPX4D

Maximum heating temperature ºC 84~85
Max. domestic hot water

temperature

ºC 60

Operating pressure
PMS / Min

Bar 8 / 0.5

Expansion Vessel Capacity litres 7
Expansion Vessel Pre-charge bar 0.5
Air Intake Pipe Diameter mm 100
Flue Pipe Diameter mm 60/100 concentric & 80/80

Twin

CO2 % at nom ±0.1% (NG) % 9.8 9.5 9.9
CO2 % at nom ±0.1% (Propane) % 10.4 11.0 10.8
CO2 % at min. ±0.1% (NG) % 10.0 10.0 10.0
CO2 % at min. ±0.1% (Propane) % 10.3 10.9 10.8
Output mass (NG) g/sec 8.77 11.17 12.94
Output mass (Propane) g/sec 8.76 10.69 12.70
Nitrogen oxide (NOx) emissions at

max. heat input

NOx

Class

5 5 5

Nitrogen oxide (NOx) emissions at
max. hot water input

NOx

Class

5 5 5

Combustion products temperature
(max.)

ºC 75 71 71

Case Dimensions mm 330(d) x 430(w) x 720(h)
Net weight kg 35 36 37
Gross weight kg 38 39 40

4

*Technical values are given by Notifi ed body.

5

Key

1 – Flue Sensor
2 – Thermal Fuse
3 – Heat Exchanger
4 – Ionisation Electrode
5 – Ignition Electrode
6 – Fan Group (Fan, Air Gas Mixer, Ring)
7 – Expansion Vessel
8 – Ignition Transformer
9 – Overheat Safety Thermostat
10 – Central Heating Temperature Sensor (Flow)
11 – Pressure Relief Valve
12 – Gas Valve
13 – Pressure Sensor
14 – Pump
15 – Return Hydroblock
16 – Central Heating Temperature Sensor
(Return)
17 – Condensing Trap
18 – Burner
19 – Plastic Flue Channel
20 – Automatic Air Vent
21 – Pressure Relief Valve

Figure 1

Valves
A - Heating Flow (22mm) Red
B - Gas Inlet (22mm) Yellow
C - Heating Return (22mm) Blue (with filter)

Figure 1a

C

D E F G H

BOTTOM VIEW

C = 39mm D = 65mm E = 86mm

F = 86mm G = 65mm H = 64mm

Figure 1b

21

A B C

3.1 The Sargon 18S / 24S / 30S are fan fl ued, wall-mounted system boilers that supplies
heating and possibly domestic hot water via a storage cylinder. Being room sealed the boiler
may be installed in any room without the need for purpose made ventilation. However, if the
boiler is installed in a compartment it is recommended that the compartment is ventilated for
cooling purposes. A functional diagram of the boiler’s principal components is given in fi gure 1.

3.2 An electronic control unit, consisting of a PCB and separate ignition module provides direct
burner ignition and fl ame supervision along with continuous modulation of the burner’s gas supply.

3.3 An interface unit, which includes boiler adjustment potentiometers
and fault display provides easy adjustment and fault diagnosis.

3.4 Heat transfer of heat to the boiler’s primary hydraulic circuit is obtained via a primary,
gas to water heat exchanger within a hermetically sealed combustion chamber. A 24
volt, modulated speed fan blows the gas/air mixture into the combustion chamber
and expels the products of combustion to outside air via an associated fl ue system.

3.5 An integral pump located in the boilers main hydraulic circuit circulates water
through the primary heat exchanger to the central heating circuit. In the event of
reduced or interrupted water circulation in the central heating circuit, an automatic
system by-pass should be fi tted as far away from the boiler as possible. Note: It is
no longer permissible to utilise a non-thermostatic controlled radiator as a by-pass.

3.6 Room temperature can be controlled by the use of an external room thermostat
and thermostatic radiator valves. Note connection of the room thermostat is
dependant on the operating voltage of the thermostat. See section 9.4 & 9.5 for details.

3.7 The boiler incorporates an integrated clock, which allows the setting of central heating
periods (See the User Instructions, Boiler Controls for details) and the boiler’s control panel
incorporates an LCD display, which indicates the state of operation and fault defect codes.

4.1 Using the operating switch the boiler can be set to operate central heating.

4.2 DOMESTIC HEATING MODE:

When the Control is set to “ON” and a heating demand is requested, (power is on, the
timer and thermostat are calling for heat) the boiler will fi re automatically. The integral
pump is then energised and hot water from the boilers primary circuit is circulated
around the central heating systems pipe-work and radiators. When the demand for
central heating is no longer present, either the thermostat reaches temperature or the
time clock reaches the end of its set period, the burner will shut down and the boiler will
revert to stand-by, waiting to respond to the next heating demand. The pump will continue
to operate for a short period of time to dissipate any excess heat from within the boiler’s
heat-exchanger.

3.Boiler Characteristics

6

4. Operation

4.1 Using the operating switch the boiler can be set to operate either on domestic hot water
only or domestic hot water and heating.

Note: Domestic hot water demand draws preference over heating. During heating periods
the boiler will automatically revert back to heating mode, after a draw off of hot water, but
there will be a 45sec delay if the No.S3 dipswitch is set to the OFF position. See figure 19.

4.2 Depending on demand water is either diverted via the diverter valve to the secondary
water-to-water heat exchanger for domestic hot water or directly to the heating system.

4.3 DOMESTIC HEATING MODE:

• When the Control is set to “Winter” mode and a heating demand is requested,
(power is on, the timer and thermostat are calling for heat) the boiler will fi re automatically.
The integral pump is then energised and hot water from the boilers primary circuit
is circulated around the central heating systems pipe-work and radiators. When the demand
for central heating is no longer present, either the thermostat reaches temperature or
the time clock reaches the end of its set period, the burner will shut down and the boiler will
revert to stand-by, waiting to respond to the next heating or hot water demand. The pump
will continue to operate for a short period of time to dissipate any excess heat from within
the boiler’s heat-exchanger. If during the heating period there is a call for hot water this
will take preference over heating. When satisfi ed, the boiler will then supply the heating
demand as required. Note there will be a delay of 45sec delay depending on how the boilers
dipswitches are set. See section 15.3 for details.

4.4 DOMESTIC HOT WATER MODE:

• When the Control is set to either the “Summer” or “Winter” mode and there is a request for
hot water (a hot water faucet is opened) the boiler will fi re automatically. The integral pump
is then energised and hot water from the boilers primary circuit is circulated around
the water to water heat-exchanger, irrespective to any demand for heating, giving up its heat
to the domestic hot water. When the faucet is closed the pump will continue to operate for
a short period of time to dissipate any excess heat within the boiler’s heat-exchanger
into the heating circuit and after a 45sec delay will revert back to the heating mode
if required.

5.1 Installer Testing & Commissioning Tips

• The installer shall instruct the user in the operation of the boiler, safety devices
contained within the boiler and instruction on the location of the fi lling loop and how to
re-pressurise the system if the water pressure falls. The installer should then hand over
the instructions indicating the included Benchmark Log Book that has been completed.

4. Operation

5. General Installation

7

5.2 The boiler is designed to operate on fully pumped, pressurised sealed systems operating at
a maximum of 3bar pressure and maximum design fl ow temperature of 85°C.

5.3 The boiler’s integral expansion vessel is pre-charged to a pressure of 0.5 bar and will
accommodate a system volume of 125l at an average water temperature of 75°C and maximum
system pressure of 3 bar. If the system volume is more than 125 l an additional expansion
vessel must be fi tted to suit the size of the system. A typical installation of an additional
pressure vessel is shown below in fi gure 2 below.

NOTE: The fi lter valve must be fi tted to the boiler return at the right of the boiler.

5.4 The heating circuit should be designed and balanced to give a 20°C temperature rise across

the boiler fl ow and return.

5.5 When fi tting a new boiler to an existing system the system must be thoroughly fl ushed in
accordance with the recommendations of BS7593:2006 prior to installation.

NOTE: Also that the gas supply pipe to the boiler from the meter should be in 22 mm copper.

5.6 It is recommended that the system should be protected by a proprietry anticorrosion

inhibitor.

5.7 On installation it is important to ensure that the heat exchanger is not a natural collecting
point for air and where possible, the system pipe work should have a gradient to ensure any
excess air is carried naturally to other purpose made, air release points.

5.8 The system’s water must always be allowed to circulate whenever the circulation pump is
running. An automatic by-pass must be provided.

NOTE : It is no longer permissible to use non-thermostatic radiator valves to allow by-pass
through a radiator.

8

Figure 2

5.9 In high water volume systems or under fl oor heating systems, see section 15.2, where
prolonged operation of the boiler is expected at temperatures below 60°C, a by-pass must be
installed on the boiler outlet in order to prevent condensation forming inside the boiler body.
Failure to comply with this requirement will invalidate the manufacturer’s guarantee.

5.10 The pressure relief discharge must be directed away from any electrical equipment or
where it could cause a hazardous situation.

5.11 In order to drain the complete system effi ciently it is recommended that drain cocks
(compliant to BS2879) are fi tted at the lowest points in the system pipe-work.

5.12 Where cold water mains are fi tted with a water meter, check valve(s) or loose jumper
stopcock, you may need to fi t a domestic hot water mini-expansion vessel in order to avoid
water hammer.

5.13 To obtain the best hot water performance from your boiler it is suggested that supplies to
taps are run in 15mm copper, as short as possible and where practical, be insulated to reduce
heat loss.

5.14 The boiler incorporates a frost protection thermostat. Therefore if the boiler will not be
used for long periods of time during cold weather, in order to avoid freezing the electric supply
must be left ON and all the central heating isolation valves must be left open. The internal
frost thermostat will then operate the boiler if the temperature falls too low. However, if the
electrical supply is to be turned off the boiler, the heating system and domestic hot water
circuit must be drained.

9

6. Appliance Sitting

6.1 If the boiler is to be installed in any room or compartment, it does not require any

purpose made ventilation for combustion air. If sited in a room containing a bath or shower
then particular reference is drawn to the current I.E.E. Wiring Regulations, local Building
Regulations or any other local regulations currently in service.

6.2 The boiler is not suitable for external installation unless protected by a purpose made
building such as a boiler house.

6.3. The following clearances are recommended for installation purposes; 200mm above,
300mm below and 50mm at each side. 600mm is required at the front but this may be upon
opening a cupboard door.

6.4 Flammable fl uids and materials must be stored at least 1m away from the boiler.

6.5 The wall on which the boiler is mounted must be suffi ciently strong to support the weight

of the boiler.

6.6 A corrosion resistant or plastic condensate drain pipe must be fi tted to allow discharge of
condensate to a drain or soak away.

Where possible condensate should be discharged into the household internal drainage
system. If this is not practical, discharge can be made into an external drain. If neither of
the above options are possible then condensate must be discharged into a purpose designed
soak way.

NOTE: It is recommended that any external condensate pipe is insulated and increased to
32mm diameter in order to prevent the condensate from freezing.

6.7 For compartment installation the requirements of BS6798 and BS5440: Part 2 must be
met.

• The compartment must be of suffi cient size to permit access for inspection and
servicing or the removal of the boiler and any ancillary equipment.

• Any space used for airing clothes or storage must be separated from the appliance by
a non-combustible partition. Where the partition is formed from perforated material, then
the major dimension of the apertures shall not exceed 13mm.

• No combustible surface must be within 20mm of the boiler casing without protection.

• There must be 20mm clearance between the compartment door and boiler case.

• Where the boiler’s fl ue pipe passes through the airing space, it must be protected by

a non-combustible sleeve or fi re stop having a minimum clearance of 20 mm between
the fl ue pipe and sleeve. In addition, if the fl ue pipe passes through the partition then
the clearance gap of the fl ue pipe or its guard with the partition must not exceed 13 mm.

6.8 When the boiler is intended for use with LPG it must not be installed in a room or internal
space below ground level.

7.1. The fl ue terminal must be sited with minimum clearances as specifi ed in Figure 3. Note
if pluming becomes problematic or causes a nuisance a plume management kit is available
from your stockist.

7.2. Current regulations and standards require a terminal guard to be fi tted where the
terminal is accessible to touch or at risk of being damaged. All wall mounted terminals sited
within 2m of the level which people have normal access, should be adequately protected with
a suitably sited guard.

7.3. Where the fl ue terminates within 1m of a plastic or painted gutter or within 500mm
of painted eaves then protection should be provided in the form of an aluminium
shield at least 1m in length, fi tted to the underside of the gutter or painted surface.

7.4. The fl ue should not be sited where the condensate “plume” may give rise to a nuisance
factor under certain weather conditions.

NOTE: If you have diffi culty siting the fl ue in an appropriate location your supplier will be happy
to supply a “anti-plume management kit”, which discharges the fl ue products at a higher level.

8.1. The boiler utilises a concentric fl ue arrangement, which consists of a 60mm-diameter
inner fl ue and 100mm-diameter outer air inlet duct, which comes in either horizontal or vertical
arrangements. However, for greater fl exibility fl ues are available as 80/80mm twin pipes and
in circumstances where the plume may cause a nuisance horizontal and vertical
anti plume kits available.

NOTE: Only use approved Heatline fl ue products with this boiler, which can be sourced from
the supplier of your boiler or Heatline stockist.

8.2. The standard 705+/-5mm fl ue (fi gure 5) is not supplied with the boiler and should be
purchased separately from your supplier. This fl ue may be routed to the rear, left or right
of the appliance by means of the 90° degree bend, which is supplied in the fl ue kit (fi gure 4).
The bend is connected to the boiler using the screws provided and sealed with the gasket.

10

7. Flue Terminal Location

8. Flue (General)

11

Figure 4

Figure 5

8.3. The 60/100mm horizontal fl ue system
may be extended up to a maximum of

5.0m, excluding the initial 90° bend, using
additional spare components available
from the supplier of your boiler or Heatline
stockist. Please note only use approved
Heatline fl ue products with this boiler. (Flue
type : C13 - C33 - C43 - C53)

8.4. A vertical 60/100mm fl ue kit is also
available (fi gure 6), which can be extended
up to a maximum of 5.0m, excluding the
initial boiler connection, using additional

components available from the supplier of
your boiler or Heatline stockist. Please note the terminal is suitable for a fl at or pitched roof and
only approved Heatline fl ue products can be used with this boiler. The connection of the vertical
fl ue system is similar to the Horizontal fl ue connection. The system is connected with screws to
the boiler and the vertical extension pipes and roof terminal are connected by clips.

8.5. The 80/80mm twin fl ue pipe system may be extended up to a maximum of 20m in any
combination of horizontal or vertical confi guration using additional spare components available
from your boiler supplier or Heatline stockist.

NOTE: When such a system is used it is necessary to have all joints accessible for inspection.

8.6. The anti-plume kit comprises of a 710mm horizontal section with elbow to connect the

1m vertical condensing tube, which has a horizontal or vertical terminal dependant on your
requirements. The maximum length of horizontal fl ue including the terminal but excluding the
initial elbow from the boiler and 1m vertical condensing tube is 4m.

Figure 6

NOTE: For each additional 90º elbow ( or
two 45º elbows) used the maximum fl ue
length must be reduced by 1.5 m.

WARNING !

ONLY A HEATLINE APPROVED FLUE IS TO
BE USED WITH THIS PRODUCT. FAILURE
TO COMPLY WITH THIS REQUIREMENT WILL
INVALIDATE YOUR GUARANTEE AND MAY
LEAD TO A DANGEROUS SITUATION.

12

Minimum Separation Distances for Flue Terminals

Location

(see diagram)

Description Clearance

(mm)
A Below an opening (See Note 1) 300
B Above an opening 300
C Horizontally to an opening 300
D Below gutters, soil pipes or drain pipes 75
E Below eaves 200
F Below balcony or car port roof 200
G From a vertical drain pipe or soil pipe 150
H From an internal or external corner or to a boundary alongside the termi-

nal (See Note 2)

300

I Above ground, roof or balcony level 300
J From a surface or a boundary facing the terminal (See Note 2) 600
K From a terminal facing the terminal 1200
L From an opening in the car port into the building 1200

M Vertically from a terminal on the same wall 1500
N Horizontally from a terminal on the same wall 300

P From a structure on the roof or another roof terminal 600
Q From a vertical fl ue terminal to an adjacent wall 300
R From a vertical fl ue terminal to an adjacent wall which includes an open-

ing window (See Note 3)

1000

Notes:

1. An opening here means an opening element, such as an openable window, or
a fi xed opening such as a air vent. However, in addition, the outlet should not
be nearer than 150mm to an opening into the building fabric formed for the
purpose of accommodating a built in element, such as a window frame.

2. Boundary as defi ned in the Building Regulations (England & Wales) or the
Building Standards (Scotland) Regulations.

3. Where the wall adjacent to a vertical fl ue terminal includes an opening win-
dow, the clearance between the terminal and any part of the opening window
must not be less than 1000 mm.

P

R

Q

Q

J

H

L

F

G

I

A

B

C

D,E

H

H

N

M

K

Q

Boundary

Boundary

Figure 3

Internal corner

External corner

Double corner

13

9.1 The boiler is supplied factory wired complete with 1.5 m of mains fl y lead. All electrical
connections to the mains supply must be made in full accordance with the current I.E.E. or
other local regulations.

9.2 The boiler must be connected to an effective earth system. Using the cable supplied
the boiler may be connected via a 3 amp fused three pin plug to an unswitched shuttered
socket outlet. However if the boiler is installed in a room containing a bath or shower
regulations dictate that disconnection must be incorporated in the fi xed wiring with a switch
provided for disconnection from the mains supply having a contact separation of at least
3 mm on all poles and fused at 3 amp.

9.3 The point of connection must be readily accessible, at a distance no further than 1.5m
adjacent to the appliance and provide complete electrical isolation for the boiler and control
system.

9.4 The low voltage room thermostat terminal block is located behind the plastic cover on
the left hand side (fi gure 7). On connection of a voltage free room thermostat to the boiler,
the factory fi tted bridge across the room thermostat terminal connectors must be removed.
If a mains voltage thermostat is to be used then please refer to 9.5 below and the electric
wiring diagram in fi gure 8.

9.5 Mains powered thermostats must be connected directly to the mains circuit board as
indicated in Figure 8 where connection of the thermostat is to the terminal block within
the control box. If using this connection the link wire across the terminal block shown
in fi gure 7 must be removed.

9.6 Ensure that the polarity of the mains connection is correct as reversed polarity may
cause the appliance to malfunction.

9.7 While the boiler’s main pcb, pump, three-way valve and gas valve are supplied at 230V
a.c., all other components and associated circuits are supplied at low voltage.

9.Electrical Connections

Warning!:

On no account must any
mains voltage be applied to
any of the terminals on the
heating control connection
plug.

Figure 7

14

9.8 On connecting the mains electrical supply to the boiler, it is essential to ensure that
electrical safety checks for earth continuity, earth resistance, polarity and short circuit are
carried out prior to making the fi nal connection. A diagram of the boiler’s electrical circuit is
given as fi gure 8.
Fuse ratings: 2AT

Figure 8

Open Therm On / Off

Low Voltage Room

Thermostat

Mains powered
thermostat connections

15

TOP

BOTTOM

10.1 Prior to installing the boiler check the contents of the carton: Appliance, Valves, Wall
Hanging Bracket, Mounting Template Service, Installation and User Manual, which includes
the Benchmark Log Book and Guarantee Card. The boiler dimensions are given in fi gure 10.

10.2 Ensure that the boiler is suitable for the gas supply by checking the data plate, which
is situated on the inside of the control panel door, and that the system and chosen boiler
position is in accordance to Sections 5, 6 and 7 of these instructions.

10.3 Position the supplied template on the wall, ensuring it is level both vertically and
horizontally. (fi gure 10) Mark the boiler wall bracket fi xing positions and fl ue outlet position
(rear fl ue only). For fl ue side exit from the boiler - Mark the horizontal fl ue centre line on the
rear wall. Extend the horizontal line to the side wall allowing a 3° decline back (if required,
see note below) towards the boiler, to enable condensate to drain back through the boiler.
Mark the fl ue centre vertical line. ( fi gure 11)

NOTE : Some fl ues may have the 3° built in and as such these fl ues may be installed in a
horizontal position.

Figure 9

Figure 10 Figure 11

A: 430 mm
B: 132 mm

10. Boiler Installation

16

10.4 When cutting the fl ue hole it is recommended that a 105mm diameter core drill is used
where both internal and external access for the fl ue installation is available. Where only
internal access is available a 125mm diameter core drill should be used. (Note: Please take
adequate precautions to prevent debris entering the boiler via the fl ue outlet).

10.5 Using a 8·5mm drill bit, drill the holes for fi xing jig (optional) and hanging bracket.
Locate and secure the supplied wall mounting bracket and fi xing jig in position (fi gure 12).

Figure 12

10.6 Mount the boiler onto the fi xing bracket via the boiler mounting slots, (fi gure 12).

10.7 Connect isolation valves to the boiler ensuring the washers are fi tted correctly.

NOTE: Refer to Figure 1 which shows the correct location of each valve.

10.8 Condensing type boilers must be connected to an appropriate drainage system either:

a. A corrosion resistant or plastic drain must be fi tted to allow discharge of
condensate to a drain, see fi gure 13a.

b. Discharged into the internal household draining system. If this is not practical,
discharge can be made externally into the household drainage system or a purpose designed
soak away.

10.9 Using 50cc of water prime the condensate by either removing the bottom of the trap
using an appropriate allen key or via the inner fl ue duct at the top of the boiler.

Figure 13a

Figure 13b

17

10.10 On installing the horizontal fl ue, determine the required length of the outer air duct
by measuring the distance ‘L’ (fi gure 14) from the face of the external wall to the bottom
of the larger socket of the boiler’s elbow connecting collar.

NOTE: The measurement for the inner fl ue duct will be ‘L’ + 10mm and the maximum length
of horizontal fl ue is 5.0m excluding the elbow connected to the boiler.

10.11 When fi tting the terminal measuring from the back of the terminal connection,
mark the distance ‘L’ onto the outer air duct. (fi gure 14)

10.12 Cut the outer air duct only to the required length ensuring that the cut is square and
free from burrs.

Figure 14

10.13 Measuring from the back of the terminal connection, mark distance ‘L’ + 10mm
(fi gure 15) onto the inner fl ue duct and cut the duct to size, ensuring that the cut is square
and free from burrs.

Figure 15

10.14 Pass the fl ue assembly through the wall and connect the assembly to the boiler,
ensuring that both the air and fl ue duct joints are fully pushed home into the connecting
elbow’s collar.

10.15 With the fl ue and joints secured fi t the fl ue trim to the external wall surface using
a suitable mastic.

NOTE : Where there is no external access to the fl ue terminal the fl ue trim must be attached
to the fl ue assembly prior to passing the assembly through the wall.

10.16 The vertical system diagram is shown in fi gure 16.

NOTE: Maximum vertical fl ue length is 5.0m.

Waste

L

External
wall face

L+20mm

L

L+10mm

18

Figure 16

10.17 Provisions to fi ll the boiler and system must be made by the Installer, using
an approved fi lling loop. The fi lling loop used must be approved to current water by laws and
fi tted as close to the boiler as practicable. If it is not practicable to install the fi lling loop
in an obvious position please add a label on the boiler to state where the fi lling loop can be
found for future reference.

NOTE: Please instruct the user how to top up the pressure if required.

10.18 Connect the cold water inlet, heating system fl ow & return and pressure relief valve

pipework to the supplied boiler fi ttings, ensuring that the pipework has been correctly
fl ushed before fi nal connection.

10.19 The electrical connections to the boiler must be in accordance with Section 9 of these
instructions.

10.20 The boiler should be fi lled using a fi lling loop with a double check valve, which should
be disconnected when central heating system is pressurised at 1.5bar.

19

11.1 The gas supply pipe must be capable of supplying the quantity of gas required
by the boiler (see Technical Data section 2) in addition to the demand of any other gas
appliances being serviced from that supply.

11.2 The internal diameter of the gas supply from the meter to the boiler’s gas inlet
connection must not be less than 22mm.

11.3 The meter governor must be capable of delivering a pressure of 20mbar for natural gas
or 37mbar for propane, dependant on the gas being used.

11.4 On fi nal connection of the gas supply to the boiler, the complete gas installation
including the gas meter, must be tested for tightness and purged.

12.1 The boiler must not be operated until the system is full of water.

12.2 On completion of the boiler installation and ensuring that all water connections are

correctly made the boiler may be fi lled with water via the fi lling loop (not supplied with
the boiler). Ensure that two manual feed valves and boiler isolation valves are open.

12.3 Release the cover cap on the boiler’s automatic air vent, which is located on top
of the internal pump (fi gure 17), and the manual vent on top of the heat exchanger when
fi lling the system.

Figure 17

12.4 The manual feed valves must be closed and the fi lling loop disconnected once
the pressure gauge, sited on the boiler’s control panel, indicates a system pressure of 1.5bar.

12.5 Check that all the water connections throughout the system are sound and bleed
each of the heating system’s radiators in turn. As air is vented the system pressure may need
topping back up to 1.5bar.

12.6 Air must be vented from the boiler’s pump by unscrewing the pump’s integral vent plug
and allowing water to bleed for a few seconds. Take care not to allow water to splash
onto any electrical components.

11. Gas Supply

12. Filling The System

20

12.7 When the system is bled of any air it must be fi lled until the pressure gauge indicates a
system pressure of 1.5bar.

12.8 If the pressure exceeds 1.5bar discharge the excess pressure from the system via
a radiator valve or pipe connection. Do not use the safety discharge valve as the valve seat
may become contaminated with debris and fail to re-seal.

13.1 Central Heating Temperature Controls: The boiler’s integral control unit monitors
and adjusts the boiler’s hydraulic circuit water outlet temperature by means of a sensor
located on the C/heating outlet pipe. The sensor convert the water temperature into an
electrical resistance that is relayed back to the control potentiometer (2 fi gure 18) located
on the control panel. The potentiometer control dial allows manual setting of the maximum
required temperature (reference value) between 30º and 85ºC. When the boiler operates,
the resistance measured is compared to the manually set reference value. The differential
determines the modulation of the gas valve adjusting the useful heat output generated and
stabilising the temperature to within 1ºC.

13.2 Re-set Function: Should the boiler lock out at any time, please check the water
pressure, which should be between 0.8 and 2.0bar, the gas supply and ionisation probe

position, the boiler may be re-started by switching to standby “

” position (Switch 3 fi gure

18) waiting 30 seconds and switching back to its previous position once the fault has been
eliminated. If the problem re-occurs please seek advice.

13.3 Function Switch: The two position switch allows the boilers operation to be set to Stand-

by (centre position -

) ‘C.Heating’ (counterclockwise) Switch 3 fi gure 18).

Important Note!

In order to maintain the appliance’s warranty; after initial fi lling the heating system
must be thoroughly fl ushed using a propriety cleanser to remove foreign material and
contaminants. Ensure the boiler is isolated before fl ushing the system.

13. Control Panel Functions

21

1- Analogue Timer 4- C.H. Pressure Gauge
2- C.H. Temperature Control 5- LCD Display
3- Function Switch

13.4 LCD Display: While giving the operational status of the boiler and water temperature,
to aid in fault diagnostics the control unit has a built in facility that automatically indicates a
fault status. If more than one fault simultaneously occurs, then only the highest priority fault
is displayed. (Figure 19)

Figure 19

1- Flame Indicator 4- Set Indicator
2- Service Mode Indicator 5- C.H. Indicator
3- Reset Indicator 6- Water Temperature Indicator

Failure Codes:

F0 - The Water Pressure is TOO LOW or TOO HIGH
F1 - Lockout due to overheating. This may be the overheat thermostat or thermal fuse.
NOTE: If the Thermal Fuse has blown the boiler will not re-set until the heat

exchanger has been replaced.

F3 - Primary temperature probe damage
F4 - Lockout due to ignition problem or Condensate Trap Blockage
F5 - Combustion product (fl ue) temperature probe damage
F6 - External temperature probe damage
F8 - Fan speed out of set range
F9 - Fan is moving when it should be stationary
OC - External sensor is connected and OTC enabled
CC - External sensor is disconnected and OTC disabled

Figure 18

22

13.5 Pressure Gauge: The pointer on the gauge indicates the pressure within the boiler and
central heating system and should, when the water is cold, read 1.5bar but may be between
1 and 2bar.

If the pressure gauge falls below 1bar the system and boiler must be re-pressurised.
If there is a signifi cant loss in pressure the boiler will lock out. The system may be re-
charged by opening the fi lling loop to charge the system back up to 1.5bar (when cold) as
indicated on the pressure gauge DO NOT OVERCHARGE THE BOILER PRESSURE BEYOND
2BAR AS THE BOILER WILL NOT OPERATE. The fi lling loop, a fl exible hose with two valves,
should be located below the boiler connecting the second pipe on the right to either one
of the outer pipes, see fi gure 2. DO NOT CLOSE ANY OF THE THREE SERVICE VALVES
CONNECTED DIRECTLY TO THE BOILER. If the boiler frequently loses pressure then your
installer should be consulted. Failure to have leakage repaired may cause corrosion within
your heating system.

Figure 20

The operational time periods may be set as follows:

• Rotate the clock actuator mechanism clockwise, by hand, until the arrow indicates the
current time, see fi gure 21. The example shows the current time is set at 21:05.

• The time is set in 24 hour format, e.g. the time for 1pm would be 13.

• Select the boiler “On” times by pushing the black tappets to the outside.

• Select the ‘Off’ times by pushing the black tappets towards the

centre of the clock.

Figure 21

[ 1 ] A time clock
allowing the automatic
switching ‘On’ and ‘Off’
of
the central heating
is fi tted as standard.

Timer

23

The clock operation can be set by the selection switch, which has three positions:

1. I (Up) position: The boiler is controlled by the function switch (3, Figure 18) and
operation is independent of the clock tappets.

2.

(Mid) position: The boiler is controlled by both function switch and clock tappets.

3.

(Down) position: The boiler is off independent of the function switch.

13.6 Service Mode Function: Turn the thermostat control knob 2 Figure 18 to minimum.
Turn selector control knob (4 Figure 18) from OFF to On (Heating Mode) three times each
within a two second interval. A wrench symbol will be displayed in the LCD window and the
boiler will ignite at minimum rate. The boiler is now in service mode and will stay there for
15mins, to obtain maximum rate simply turn the C/H control knob to max.

14.1 The boilers have been tested and pre-set at the factory and is dispatched with its on
board controls set to provide mid range central heating output. Consequently, once all
the connections have been made and the boiler has been fi lled with water to the designed
system operating pressure, the boiler may be fi red prior to adjusting it’s on board controls to
suit the demand of the system.

14.2 Prior to fi ring, the condensate trap must be fi lled with water and plastic discharge
pipe connected to drain before operating the boiler, see section 10.9 for details, check that

the electrical supply to the boiler is ‘On’ (Indication is shown on the LCD display) and the gas
service cock is in the open position.

• Set the boiler’s central heating and domestic hot water temperature controls
to maximum by turning them fully clockwise.

• Set the external room thermostat (if fi tted) to maximum and set thermostatic radiator
valves to maximum.

14.3 Switch the boilers function switch to the central heating and domestic hot water
position. The boiler’s control unit will now automatically carry out pre-ignition safety checks
before igniting the burner.

14.4 On burner ignition check the integrity of the boiler’s fl ue for tightness and correct
operation.

14.5 Check the boiler for correct domestic hot water operation by opening and closing
the household domestic hot water draw-off taps.

14.6 Restart the boiler and again allow the central heating system to reach maximum
operating temperature. Check that all the water connections throughout the system are
sound and bleed each of the heating systems radiators and purpose made air release points
in turn.

14. Commissioning

24

14.7 Check the manual air vents, and bleed the heat exchanger by means of the screw
on the manual air vent. Check the system pressure and top up if necessary.

14.8 Reset the central heating water temperature control and room thermostat to the
desired temperature settings.

14.9 IMPORTANT: Failure to thoroughly fl ush the heating system with proprietary cleanser
(with the boiler disconnected), or to add an anti corrosion inhibitor to the system water may
invalidate the boiler’s warranty.

15.1 The boiler incorporates 4 potentiometers and a bank of 8 dip switches to allow
adjustment to its pre-set parameters. These are situated on the rear of the control panel.
(fi gure 22) and accessed by removal of the front panel and dropping the front of the control
box, by releasing the two grey catches in the top corners. Figure 23 shows default dipswitch
settings. The potentiometer settings are the same for NG and LPG.

Potentiometers on the back of the board:

SARGON 18S SARGON 24S SARGON 30S

No Function Factory

Settings

Factory

Settings

Factory

Settings
1 R31 Maximum fan speed 2 o’clock 10 o’clock 10 o’clock
2 R29 Maximum CH power 6 o’clock 6 o’clock 7 o’clock
3 R30 Ignition power 6 o’clock 6 o’clock 6 o’clock
4 R28 Anti cycling time 9 o’clock 9 o’clock 9 o’clock

Dipswitches 1-8 on the back of the board:

No Function ON OFF

S1 Gas Type S1 - NG - LPG
S2 CH pump 45 sec post pump OFF

S3

45 sec waiting time

from DHW to CH

Yes

No

(direct change

over)
S4 DHW mode Tank Combi
S5 CAM timer No Yes

S6

CH 30°C/85°

– 30°C/50°C

30°C/85°C 30°C/50°C

S7* Gas Type S7 No Yes
S8* Gas Type S8 Yes No

15. Onboard Adjustments

NOTE*: Dip Switches S7 and S8 relate to the type of European gas used. These are factory

set and must not be adjusted. Factory settings of dipswitches given below. (S1 to S8)
Sargon 18S : OFF - ON - ON - OFF - ON - ON -ON - OFF
Sargon 24S : OFF - ON - ON - OFF - ON - ON -ON - OFF
Sargon 30S : ON - ON - ON - OFF - ON - ON -ON - OFF

25

15.2 Setting the Maximum Central Heating Flow Temperature: The boiler is dispatched with
the CH fl ow temperature set at 85°C. When a lower maximum temperature is required, such
as in the case of under-fl oor heating, the factory setting can be adjusted to a maximum of
50°C giving a return temperature of 30ºC, by setting dip switch ‘S6’ into ON position.

15.3 255 seconds delay setting: The boiler is capable of up to 255 seconds ignition delay
(anti cycling time) before re-ignition following burner shut down on the primary hydraulic
water reaching its set temperature. This delay can be increased up to a maximum of 255
seconds by turning potentiometer R28 (Figure 22) clockwise.

15.4 Pump working mode setting: The boiler has a factory set to operate the pump for
pre-purge and post-purge times (45 sec.). This delay can be excluded by fi tting dipswitch ‘S2’
(fi gure 23) into ON position. However, this may then cause the boiler over-heat thermostat
to trip out.

Figure 22

Figure 23

26

15.5 The maximum and minimum heat output for heating : Hot water output is dictated by
demand whilst the heating is pre-set on potentiometer 29 at 4 o‘clock (fi gure 22). The C/H
may be adjusted to match your heating requirement if required.

15.7 Gas valve ignition capacity : The graduated opening of the gas valve for ignition rate
is governed by the potentiometer R30 control, which is factory set at 6 o’clock.

15.8 The boilers integral pump is factory set to its maximum speed setting to give a 1000 l/hr
fl ow on a nominal 4m head. The pump may be adjusted to a lower speed to match
the designed central heating system requirements. (See Figure 24 for fl ow rates)

16.1 An hydraulically operated primary pressure switch monitors water pressure or water
shortage in the primary hydraulic circuit and will switch the boiler off if the pressure is below

0.8bar. The boiler will not operate until the circuit has been re-pressurised.
The recommended pressure of the system is 1.5bar when cold.

16.2 The temperature of the water fl owing from the primary heat exchanger is monitored
by an overheat thermostat located on the outlet pipe. If the water temperature gets too hot
the switch opens, cutting off the electrical supply to the gas valve and causing the boiler
to ‘Lock-out’, fault code F1. Once activated the boiler has to be cooled and manually re-set
by switching the control knob off for a minimum of 30sec and on again. If the boiler fails
to re-set then the Thermal Fuse described in Section 18.3 must be checked and replaced
if necessary.

16.3 The boiler’s control unit has an in-built frost protection device that fi res the boiler’s
burner when the temperature of the primary hydraulic water falls below 6°C. The device
works irrespective of any room thermostat setting and will protect the boiler. Once the water
temperature reaches 16°C the boiler reverts back to normal operation. If there is a risk
of pipes freezing in exposed places these should be well lagged and the system drained and
power switched off if the property is left empty for long periods during cold weather.

16. Safety Devices

27

17.1 To ensure the continued effi cient and safe operation of the boiler it is recommended
that it is checked and serviced regularly. The servicing must be carried out by a competent
person in accordance with the Gas (Safety and Use) Regulations. The frequency of servicing
will depend upon the particular installation conditions and usage, but in all cases the boiler
must be serviced at least once a year following the procedures set out below..

17.2 Prior to servicing a check of the fl ue operation and terminal guard (if fi tted) along with a
preliminary check of the boilers operation must be undertaken.

17.3 Ensure that both the electrical and gas supplies to the boiler are isolated before
commencing any work on the boiler.

17.5 Remove the boiler casing as follows:

• Open the front panel by removing
two screws at the bottom corners of the boiler.
See (fi gure 25).

Figure 25

17.6 Remove the combustion chamber cover by removing two screws at the sides.
See (fi gure 26)

Figure 26

17. Routine Servicing

28

• Release the side panels by removing the screws on the upper and lower sides (fi gure

27). Remove the panels by swinging them out and lifting them up.

Figure 27

17.7 Swing the control panel down towards you exposing the gas valve and hydraulic circuits.
Undo the nut on top of the gas valve, fi gure 28, and release the pipe from the fan assembly.
(Be careful not to damage or dislodge the restrictor located in the gas valve outlet) Remove
the nuts from around the heat exchanger and after disconnecting the electrodes, fi gure 29,
pull the fan and burner assembly forward giving access to the fan connections. Release the
electrical leads and remove the burner/fan assembly. (Figure 30)

Figure 29

Figure 28 Ionisation Ignition Figure 30
Electrode Electrode

29

17.8 Visually check for debris/damage and clean or replace as necessary the following items
as shown in the previous pictures:

• Heat exchanger

• Burner

• Fan

• Electrodes

• Insulation/gaskets

17.9 The boiler is fi tted with a domestic cold water inlet fi lter, which may become blocked
during the use of the boiler causing the water fl ow rate to become reduced. To gain access
to the fi lter:

• Close the isolating valve on boiler’s cold water inlet by turning the valve head fully
clockwise.

• Open one or more hot water taps to drain the hot water circuit.

• Disconnect the cold water inlet connection to the boiler.

• Remove the fi lter housing from below the boiler using a 14mm spanner. Clean and
inspect the fi lter, replace if necessary as described in section 18.16.

• Re-fi t the fi lter and reinstate the cold water inlet connection to the boiler.

• Fully open the isolating valve on the boiler’s cold water inlet and check for leaks when

the hot water taps are closed and the circuit is pressurised .

17.10 On completing the service reassemble the boiler components in reverse order.
Take care not to damage or dislodge the gas restrictor and ensure that all component joints,
gaskets are sound. Any damaged gaskets must be replaced.

17.11 Reinstate the boiler’s electrical and gas supplies and check for gas tightness and
correct boiler operation.

17.12 Due to the construction of the heat exchanger the condensate trap should not become
contaminated. However, it may be fl ushed if required by pouring hot water through the heat
exchanger discharge pipe, which can be seen in fi gure 31a. If this is not successful the bowl
of the trap can be removed using a large allen key in the socket of the outlet tube of the bowl
after the fl exible pipe has been removed from underneath, please be sure the electrical
connections condensate trap (upper connector-alive [ionisation], lower connector-earth)
see fi gure 31b.

IMPORTANT!

• Clean the heat exchanger using a soft brush or
vacuum cleaner. Do not use any tool likely to damage the
surface of the heat exchanger.

• Clean the burner by washing in soapy water. Allow to
dry thoroughly before re-fi tting.

• Do not use wire or a sharp instrument to clean the
burner ports.

Figure 31a

Figure 31b

30

17.13 Following servicing of the boiler the relevant sections of the ‘Benchmark’ Installation,
Commissioning and Servicing Log Book, found at the back of these instructions, must be
completed and the combustion ratio checked via the access port on the fl ue elbow. For NG
and LPG, emission values should be as given technical data table in section 2. The CO/CO

2

ratios should be less than 0.004.

18.1 Central Heating and Flue Sensor

• Read the notes at the head of this section before commencing any work on the
appliance.

• The Flue sensor is located on the plastic fl ue socket. (Figure 32)

• The Central heating ntc sensor is located on the pipe. (See fi gure 1)

• Disconnect the leads from the sensors.

• Remove the sensors from the pipe/plastic fl ue.

• Fit replacement sensors.

• Fit the leads to replacement sensors.

CAUTION!

While there are no substances harmful to health contained within this appliance, some
component parts of the boiler (insulation pads, gaskets and rope seals) are manufactured
from man made fi bres. When damaged or broken these fi bres may cause a temporary
irritation. High dust levels may irritate eyes and upper respiratory system. It is important
therefore, that sensible precautions are applied when exchanging components.

NOTE:

1. Ensure that both the electrical and gas supplies to the boiler are isolated
before replacing any component part.

2. To prevent the need to drain the entire heating system when replacing
the boiler’s integral pump, expansion vessel, safety relief valve and pressure sensor, the
boiler’s hydraulic circuit may be isolated from the central heating circuit by closing the
boilers isolation valves below the boiler. Opening the plastic drain cock, which is located
below the boiler and behind the pump, will then drain the boiler’s hydraulic circuit.
If the water does not drain freely open the manual vent on top of the boiler.

3. For replacement of the following components it will be necessary to remove
the boiler casing panels as described in Section 17.

18. Component Replacement

31

18.2 Thermal Fuse

• Read the notes at the head of this section before commencing
any work on the appliance.

• The thermal fuse is located at the top right of the heat
exchanger.

• Squeeze the plug to disconnect catch and pull off the electrical
connector. Then using a spanner remove the thermal fuse. Note this
is a dry pocket and does not require the boiler to be drained.

• Read the notes at the head of this section before commencing any work on the
appliance.

18.3 Fan

• Read the notes at the head of this section before commencing any work on the
appliance.

• Swing the control panel down towards you exposing the gas valve and hydraulic
circuits. Undo the nut on top of the gas valve, fi gure 28, and release the pipe from the fan
assembly. (Be careful not to damage or dislodge the restrictor located in the gas valve outlet)

• Remove the nuts securing the fan assembly to the front of the heat exchanger and , pull
the fan assembly forward giving access to the fan connections.

• Release the electrical leads and remove the burner/fan assembly

• Fit the replacement fan unit in reverse order and reconnect all electrical leads.

18.4 Spark Generator

• Read the notes at the head of this section before commencing any work
on the appliance.

• NOTE the orientation of the spark generator and locations, 1-4, of the cables attached
before removing them. See Figure 33.

Terminal 1 Live
Terminal 2 Neutral
Terminal 3 Rectifi cation
Terminal 4 Spark Ignition

Figure 33

• Remove the two screws securing the generator.

• Fit the new generator in the same orientation and reattach the leads to terminals 1-4

as removed. See Figure 33.

Figure 32

32

18.5 Printed Circuit Board (PCB)

• Read the notes at the head of this section before commencing any work on the
appliance.

• Remove interface cover by lifting the two latches. (fi gure 34)

• Access the main PCB by opening the PCB cover.

• NOTE the location of each plug before removing the electrical connections from

the PCB by releasing the clips and carefully pulling off the connectors.

• Release the 4 screws securing the PCB to the control panel and lift out the PCB

• Fit the replacement PCB in reverse order of removal, ensuring that the PCB electrical

connections are correctly located and fully pushed home.

18.6 Pump

• Read the notes at the head of this section before commencing any work
on the appliance.

• The order of removal is dependant on whether it is
the motor or body that has failed.

In case of motor failure:

• Disconnect the screws connecting the pump head to the body, fi gure 35.

• Pull off the pump head and disconnect the electrical connection from the cable

connection box of the pump, fi gure 36.

Figure 35 Figure 36

Figure 34

33

• Fit the replacement motor in reverse order ensuring the correct polarity of the
electrical connections

• Open the isolating valves on the fl ow and return connections, refi ll, vent and re-
pressurise the water system to 1.5bar ensuring the pump union joints are sound.

In case of pump body damage:

• Remove the motor as described above.

• Remove the expansion vessel pipe connection 8

by releasing the clip on the pump body.

• Remove the pressure switch connection as detailed
in section 18.12.

• Disconnect the pumps outlet fi tting.(fi gure 38)

• Remove the fi xing screws on the pump and

hydraulic block, located at the bottom right of the boiler.
(fi gure 39)

• Remove the pump body assembly.

• Detach the pump body from the hydraulic block

by removing the clip.

• Fit the replacement body in reverse order ensuring that the pump washers are fi tted
and the correct polarity of the electrical connections is maintained.

• Open the isolating valves on the fl ow and return connections, refi ll, vent and
re-pressurise the system ensuring the pump union joints are sound.

18.7 Primary Heat Exchanger and Burner

• Read the notes at the head of this section before commencing any work
on the appliance.

• Disconnect the pipes from the heat exchanger.

• Release the union connections on the pump and hydraulic block, retaining the washers

for re-assembly.

• Remove the pump, heat-exchanger and heat-exchanger three-way valve connecting
pipes.

• Remove the burner as detailed in (17.7)

• Remove the screws from the brackets retaining the exchanger.

Figure 38

Figure 39

34

• Remove the heat exchanger by pulling forward.

• Fit the new heat exchanger and reassemble the boiler in reverse order ensuring all the
washers and seals are fi tted correctly. (Replace any damaged washers or seals)

• Open the isolating valves on the fl ow and return connections, refi ll, vent and re-

pressurise the system ensuring that all joints are sound.

• Check the manual air-vent, and vent the air from the heat exchanger by means of the
screw cap on top of the manual air-vent.

18.8 Gas Valve

• Read the notes at the head of this section before
commencing any work on the appliance.

• Disconnect the silicone tube and electrical connections
from the gas valve.

• Undo the nut on top of the gas valve, fi gure 40, and release
the pipe from the fan assembly. (Be careful not to damage or
dislodge the restrictor located in the gas valve outlet)

Figure 40

• Release the main gas connection below the gas valve.

• Remove the gas valve’s two securing screws and washers from the bottom side of

boiler. (Figure 41)

• Rotate the gas pipe and withdraw gas valve assembly.

Figure 41

• Carefully remove the restrictor from the top of the gas valve and insert it into the top of
the new valve.

• Refi t in reverse order to removal replacing any seals and gaskets as required.

• Check for gas tightness and correct boiler operation.

• Where necessary the gas valve settings may be re-calibrated by the following method

in 18.9.

35

18.9 Gas Conversion Setting:

• Read the notes at the head of this section before commencing any work on
the appliance.

• Insert a combustion analyser into the socket on the fl ue adapter.

• Check the Potentiometer setting R31.

R 31 potentionmeter adjustment (clockwise)

G20

SARGON 24 SARGON 30 / 35

2 o’clock 10 o’clock

• In order to set the appliance in service Mode turn the two control knob 2 Figure 18 to
minimum and switch the control knob 3 from OFF to On (Heating Mode) three times each
within a two second interval. A wrench symbol will be displayed in the LCD window and
the boiler will ignite at minimum rate.

• In this mode of operation the gas rate will be controlled by the CH control for 15min,
after which time normal operation will take over and the wrench symbol will disappear.

• With the CH control knob at minimum gas rate using a 4mm allen key adjust
the gas valve to give a CO

2

value due to Technical Data table. (section 2) Clockwise: increase

the CO

2

value, anti-clockwise: decrease CO

2

value.

• Please check CO

2 values for maximum gas rate if required.

• NOTE ALL GAS RATIOS MUST BE LESS THAN 0.004.

Figure 42

36

18.10 Expansion Vessel

• Read the notes at the head of this section before commencing any work
on the appliance.

• Disconnect the pipe coupling on the expansion vessel (fi gure 43).

• Lift the pressure vessel out of boiler from the gap over the chassis and fi t

the replacement vessel to the boiler in reverse order of removal ensuring the sealing
washer is fi tted to the pipe connection before
tightening.
(Replace the washer if required)

• Using a pressure sensor, check that
the expansion vessel charge pressure is
0·5bar (7·5psi)

• Open the isolating valves on the fl ow
and return connections, refi ll, vent and
pressurise the boiler ensuring all joints are
sound.

Figure 43 Figure 44

18.11 Overheat Safety Thermostat

• Read the notes at the head of this section
before commencing any work on the appliance.

• Locate the overheat safety thermostat upstream of the three way valve (see fi gure 1).

• Disconnect the electrical connections from the thermostat.

• Remove the thermostat from the pipe being careful not to damage the retaining clip.

• Fit the replacement thermostat in reverse order to removal.

18.12 Pressure Sensor

• Read the notes at the head of this section before commencing
any work on the appliance.

• Disconnect and remove the sensor cable and sensor from
the hydroblock. (fi gure 45)

• Fit the replacement pressure sensor in reverse order ensuring
the gasket is correctly fi tted. (Replace the gasket if damaged)
Figure 45

37

18.13 Pressure relief valve:

• Read the notes at the head of this section before commencing
any work on the appliance.

• Disconnect the discharge pipe on the outlet of the safety valve.

• Disconnect the safety valve from the diverter valve.

(Figure 46)

• Fit the replacement safety valve in reverse order from removal
and refi ll, vent and pressurise the boiler ensuring all joints are sound
and service valves open. Figure 46

If gas conversion is required (from NG to LPG etc.), follow the instructions below using only
approved components from your agent:

• A fl ue gas analyser must be used when making any adjustments that can affect the
combustion characteristics of the boiler. (this includes converting to a different gas type)

• Change the diaphragm, which is located in the outlet of the gas valve.

( See section 2 - technical data table for gas valve diaphragm details )

• Once re-assembled check for gas tightness.

• Set the CO2 as described in section 18.11 Gas Conversion Setting noting the correct

CO2 value for the type of gas that will be used.

• Check for correct boiler operation.

19. Gas Convention

Warning!

Gas conversion must be carried out by a competent person as
defi ned in the Gas Safety (Installation and Use) Regulations.

Important!

Gas type conversion must be completed by attaching the labels
included in the gas conversion kit to the boiler.

• Type of gas label – in a visible position inside the boiler.

• Grey label – to cover the existing gas type on the data plate.

• Instruction label – Inside drop down cover on the front of the

boiler.

38

NOTE:

When installing, commissioning or servicing a gas appliance that incorporates a pre-mix burner
and zero-set governor, because it is not possible to measure an operating pressure the engineer
should fi rst check that the gas supply is metered and ascertain whether it is possible to measure
the gas rate. If the gas input rate can be measured then the requirements of GSIUR 26(9) can be
met, including any specifi c requirements in manufacturers’ instructions. If gas input rate cannot
be measured then, to satisfy the intent of GSIUR 26(9), the engineer shall measure the combustion
quality of the appliance in accordance with BS 7967 or the technical data of this manual.
If the engineer does not have the required equipment and no alternative test is specifi ed
by the manufacturer then the appliance shall be turned off and disconnected as
an un-commissioned appliance until such time that equipment is available to undertake such
tests.

Chart I

Check electrical supply - C.H. Sensor and frost protection

Check the following carefully before starting

• Gas supply is on, adequate and purged.

• Electric supply is on.

• Polarity is correct.

• Pump spins freely.

Winter mode is selected by function
knob on front panel.

CH system pressure is must
be between 1 and 2 bar.

Check low water
pressure switch cable
connections.

Check and if necessary
replace low water
pressure switch.

Check suppy lead,
F1 -F2 fuse and replace
if necessary.

Replace interface
card.

Is lcd display on?

Is led display on?

Is F0 failure code shown on lcd?

Fill up system to 1 - 2 bar.

NO

NO

YES

YES

YES

YES

YES

NO

NO

YES

NO

NO

YES

YES

NO

NO

Replace main
PCB

NO

Is 230 V ac present on
terminals X15?

Is water pressure
between 1 and 2 bar?

YES

NO

NO

Does fan at full
speed?

Check pump connection cables
and 230 V ac supplying of pump.

Check CH sensor
cable connections.

Is F3 failure code
shown on lcd?

Change main PCB.

Check supply lead.

Does pump run?

Does burner work?

Go to Chart V

Go to Chart III

Is F3 failure code shown on lcd?

NO and F7 or F8 or F9 failure code showing on lcd.

Does pump run?

If temperature of the system is less then 6°C, frost protection
system is activated and snow symbol in shown on lcd display.

Select the CH position.

20. Fault Finding Chart

39

Chart II

Check Centra l Heating O perati on

Ensure extern al

controls are calling

for heat

Is F1 fa ilure code

shown on lc d?

Put CH tem perature

sel ect or to maximum

NO

Do es pump run?

NO

Is 230 V AC pr esent on
ter minal s of pum p and

main P CB?

YES

Check and if

nec ess ary repl ac e

CH supply / return

sen sor

Go to Chart IV

Is F3 fa ilure code

shown on lc d?

YES

NO

YES

Re set Control

Check and if n ece ssary

replac e o verheat

thermost at, che ck pump

Check CH supply sensor

YES

Check and if

necess ary

repl ace

Main PCB

NO

Check Ext ernal CH
control input s and

wiring

Check, and if

nece ssary replace

main P CB

Check cab le
connec tions of f an, and
if n ece ssary rep lace
fan .or r epl ace ma in
PCB

Check cle aning o f
fan, and i f nece ssary
re

p

lace fan

Ch art III

Fan O

p

eratio n

Is 24 V dc pre s ent on X4-

1-3 terminals?

NO YES

Check, an d if n ece ssary
repla ce main PCB

Go to Char t I

YES

Re set control i f

necc esary

Do es f an run?

Was F8 failure code

shown on lcd b efor e

reset? Is F8 shown

aft er 1 minute ?

NO

NO

YES

Check fan’s cab le
connections

Check X4 conne ctors
for exami ning
switching and feed back
signals on m ain boa rd
by osil oscope.

Was F8 failure code
shown on lcd befo re
reset? Is F8 shown
aft er 1 minute?

18.14 Pressure Sensor

• Read the notes at the head of this section before commencing
any work on the appliance.

• Disconnect and remove the sensor cable and sensor from
the hydroblock. (fi gure 48)

• Fit the replacement pressure sensor in reverse order ensuring
the gasket is correctly fi tted. (Replace the gasket if damaged)
Figure 48

18.15 Hydroblock

• Read the notes at the head of this section before
commencing any work on the appliance.

• Remove the secondary heat exchanger as detailed in 18.7.

• Remove the pump with the hydroblock section as detailed

in 18.6.

• Remove the section of the hydroblock from the pump by
releasing the clip. Figure 49

• Release the heat-exchanger outlet pipe nut
and rotate the pipe for ease of removal from the
remaining section of the hydroblock as described
in 18.2.

• Disconnect the three way valve stepper motor
electrical connection and remove the stepper motor
by releasing the clip as described in 18.17

• Release the nut connecting the CH outlet
connection to the hydroblock (fi gure 49). Figure 50

• Disconnect the DHW sensor as described in 18.1.

• Remove the screw securing the remaining section of the hydroblock to the combination
boiler (fi gure 50).

• Fit the replacement hydroblock sections (fi gure 51) in reverse order of removal

ensuring all components are assembled correctly. Replace any seals or gaskets as required.

40

41

PART

No.

DESCRIPTION

ORDER

CODE
1 PRESSURE RELIEF VALVE 3003200038
2 PUMP 3003201336
3 EXPANSION VESSEL 3003201948
4 GAS VALVE 3003201365
5 AIR/GAS MIXER 3003201366
6 CONTROL PANEL 3003202103
7 PCB COVER 3003200084
8 CIRCUIT BOARD 3003201368
9 INTERFACE BOARD 3003201933

10 WIRING HARNESS WITH TIMER 3003201954
11 IGNITION ELECTRODE CABLE 3003201985
12 IONASITON ELECTRODE CABLE 3003201986
13 FLUE SENSOR 3003201949
14 CH SENSOR (NTC) 3003200152
15 FAN 3003201367
16 LIMIT THERMOSTAT 3003200397
17 FRONT PANEL 3003201988
18 SPARK GENERATOR 3003201369
19 RETURN GROUP 3003200018
20 CONDENSATE TRAP 3003201775

APPENDICES

Appendix 1 Spare

42

SARGON 18S / 24S / 30S

PRE-MIX CONDENSING

SYSTEM BOILER

User Instructions

43

Natural Gas

Heatline Sargon 18S / 24S / 30S Pre-mix Condensing System Boiler

British Gas Service Listing:

SARGON 18S G.C.No. 41-157-12
SARGON 24S G.C.No. 41-157-13
SARGON 30S G.C.No. 41-157-14

Notifi ed Body

IMQ 51BP2750 Directive 90/396/EEC

51BP2751DR Directive 92/42/EEC

The manufacturer, in the continuous process to improve his products, reserves the right to
modify the data expressed in the present documentation at any time and without prior notice.

The present documentation is an informative support and it cannot be considered as a
contract towards third parties.

The Heatline™ range of heating boiler
are manufactured from high quality
materials, enabling reliability and
optimum performance.

Heatline™ are committed to the
continual development of their
appliances to ensure their customers
benefi t from the latest advances in
combustion technology and energy
savings.

‘Benchmark’ Log Book, Boiler Registration & SEDBUK

As part of the industry-wide initiative the boiler comes complete with an Installation,
Commissioning and Service Record Log Book. Please read the Log book carefully and in
accordance with current legislation complete all sections relevant to the appliance and
installation. The details within the Log Book will be required in the event of any warranty work.

On completion the Log Book, which is found at the end of the Installation manual, must be left
with the end user and the relevant sections completed on each subsequent Service visit.

NOTE: You are also obliged to register the installation of this boiler with CORGI Should you
wish to check the SEDBUK website for the rating of this boiler search under

DD HEATING or the boiler name and designation, e.g. SARGON 24S.

44

Chart I

Check electr ical su

pply

Ð C.H . s en so r and frostprotec tion

Check t h e foll owing ca refully be fore st arting

• Ga s supply is on, a dequat e and pur ged.

• Electric supply i s on.

• Polar ity i s cor rect.

• Pumps p ins freely.

Sel ect the CH pos ition

Is l cd d ispl ay on ?

NO

YES

Is 23 0 V ac pr esen t
on termina ls X1?

NO

Check supply le ad,

F1- fuse s and

replac e if necess ary

Is lcd d ispl ay on ?

YES

NO

Replac e
interfa ce

card

Replac e

main PCB

NO

Is F0 failure code shown on lcd?

NO

YES

Is w ater p res sure

bet ween 1 and 2 ba r?

NO

Fill up system to 1 -2 bar

Check low wat er
pre ssure sen sor

cable connec tio ns

YES

Check and if

nec ess ary r epl ace

low w ater pr essure

switch

NO

Do es fan run at sta rt

s

p

eed ?

YES

Do es pump

YES

Is F3 f ailure cod e

shown on lcd ?

YES

NO

Change ma in PC B ?

NO

NO, and F8 failure cod e sh owing on lcd ( afte r 1m inute)

Go to Cha rt 4

Check supply l ead

Check C H sen sor

cab le connec tion s

Is F3 failure code shown on lcd?

YES

Check pump c onnection cabl es and

230 V ac supplying o f pump

Do es pump run?

NO

Do es burner work ?

YES

NO

Go to Char t 5

Winter mod e is s elec ted by function
sel ector kno b on f ront pa nel
Ch heat demand p resent

Ch art I

Ch eck el ect ri ca l su

pply

D C. H. s e ns or and frostpro t ect io n

Chart II

Check Domestic Hot Water O

p

eration

Check if w ater filter
is cl ean
Check if Turbine
stuck

NO

Open DH W ta ps

Is DHW Mechanical flow rate at l east 2 lt/min?NO

Check cold water
inlet

p

ressure

YES

Is F2 or F3 failure
cod es s hown on lcd?

YES

Check and if
nec ess ary r epla ce
DHW or CH
supply/return
sensor

Check and if
necess ary repl ace
water fl ow sensor

Is F1 failure code
shown on lc d?

YES

Check and if
necessary replace
overheat thermostat,
check pump,
Check Stepper
motor stuck

NO

Go to Char t VI

Check if DH W
sym bol sh own on
lcd?

NO

Check and if
nec ess ary r epla ce
DHW tur b ine
sen sor/ wiring

20. Fault Finding Chart

45

CENTRAL HEATING MODE:

When heating demand is requested by the time clock (and thermostat) the boiler will fi re
automatically. An integral pump is then energised and hot water from the boilers primary
circuit is circulated around the heating systems pipe-work and radiators. The heat output from
the boiler is automatically adjusted by the boiler’s internal control unit to match the heating
demand. As the water temperature of the heating system increases the
gas input to the burner decreases, conserving energy and increasing
effi ciency. When the demand for heating no longer exists, either the room
thermostat is satisfi ed or the heating period has ended, the burner will
shut down and the boiler will revert to stand-by, waiting to respond to the
next heating demand. The integral pump may continue to run after shut
down for a short while to dissipate any excess heat within the boiler.

ACCESS TO THE BOILER CONTROLS:

The boiler controls are sited at the bottom of the
boiler’s front case. (See fi gure 2)

Figure 2

BOILER CONTROLS

The function and operation of the main controls located on the control panel fascia (fi gure 3)
is as follows:

Figure 3

1- Analogue Timer 4- C.H. Pressure Gauge
2- C.H. Temperature Control 5- LCD Display
3- Function Switch

1. Pressure Gauge : Shows water pressure in the system. Scale from 0 - 4bar.
Recommended water pressure in system 1.5bar.

2. Central Heating Temperature Control : The position of this control dial will determine
the temperature of the water delivered to the radiators. The water temperature can be set
from a minimum of 30ºC (anticlockwise stop position) to a maximum of 85ºC (clockwise stop
position), unless the boiler is adjusted for under fl oor heating operation when the maximum
setting is 60°C.

3. Function Switch : This is the boilers main operating switch. In the

position the boiler is

in stand-by mode and power supply is ON. For the boiler to operate the switch must be in the

position.

46

5. Timer : The operational time periods may be set as follows:

• Rotate the clock actuator mechanism clockwise, by hand, until the arrow indicates the
current time, see fi gure 5. The example shows the current time is set
at 21:05.

• The time is set in 24 hour format, e.g. the time for 1pm would be

13.

• Select the boiler “On” times by pushing the black tappets to the
outside.

Figure 5

• Select the ‘Off’ times by pushing the black tappets
towards the centre of the clock.

The clock operation can be set by the selection switch, which has three positions:

4. I (Up) position: The boiler is controlled by the function switch (3, Figure 18) and operation
is independent of the clock tappets.

5.

(Mid) position: The boiler is controlled by both function switch and clock tappets.

6. 0 (Down) position: The boiler is off independent of the function switch.

4. LCD Display Screen: While giving the operational status of the boiler and water
temperature, to aid in fault diagnostics the control unit has a built in facility that automatically
indicates a fault status. If more than one fault simultaneously occurs, then only the highest
priority fault is displayed. (Figure 4)

Figure 4

4.1. Flame indication: When ignition occurs, fl ame symbol (1) is shown.

4.2. Re-set symbol : When reset symbol (3) is showed with fault code, the boiler will need

to be re-set. To re-set the boiler, the function switch must be switched to

position and
after 30seconds turn back to its previous (summer or winter) position. If the fault continues to
occur seek advice as to curing the problem.

4.3. Central Heating Mode : When selecting winter mode and working at CH mode, system
shows radiator symbol (symbol 5).

4.4. Digits : Digits (symbol 6) shows CH temperature, fault codes etc.

47

FROST PROTECTION

The boiler has a built in frost protection device that protects the boiler from freezing. If the
boiler is to be left and there is a risk of frost, ensure that the gas and electrical supplies are left
connected. The frost protection device will light the boiler when the temperature of the boiler
water falls below 6°C. When the temperature reaches 15°C, the boiler will shut down.

Note: This device works irrespective of any room thermostat setting and will protect the
boiler, but not necessarily the full system. Ensure that vulnerable sections of the circuit are
adequately lagged.

SYSTEM PRESSURE

On installation your installer will have fi lled the boiler and system to its effective working
pressure. The boiler’s pressure gauge should be regularly checked to ensure that this pressure
is maintained between 1 and 2 bar. If there is a signifi cant loss in pressure the boiler will lock
out. The system may be re-charged by opening the fi lling loop to charge the system back up to

1.5bar as indicated on the LCD panel. DO NOT OVERCHARGE THE BOILER PRESSURE BEYOND
2BAR AS THE BOILER WILL NOT OPERATE. The fi lling loop, a fl exible hose with two valves,
should be located below the boiler connecting the second pipe on the right to either one of the
outer pipes, see fi gure 11. DO NOT CLOSE ANY OF THE THREE SERVICE VALVES.

DIRECTLY CONNECTING TO THE BOILER. If the boiler frequently loses pressure then your
installer should be consulted. Failure to have leakage repaired may cause corrosion within
your heating system.

OPER

ATING THE BOILER

Prior to operating the boiler, check that the pressure reading, on the LCD panel, lies between
1 and 2bar.

Set the boiler’s ‘Central Heating’ temperature controls to maximum by turning fully clockwise
and set the external ‘Room Thermostat’ (if fi tted) to maximum. (To set the room thermostat
refer to its manufacturer’s instructions.)

Switch the boiler’s functional switch to the position. The boiler’s integral control unit will
now automatically carry out pre-ignition safety checks before fi nally igniting the burner.

The ‘Central Heating’ temperature control and ‘Room Thermostat’ can now be set to the
desired temperature settings.

When a demand for heat no longer exists, the burner will automatically shut down and the
fl ame symbol will be not shown at LCD display, it means boiler at Stand by. The boiler will be
ready for the next heating demand.

CLEANING

The boiler casing may be cleaned with a damp cloth followed by a dry cloth to polish. Do not
use abrasive or solvent cleaners.

FURTHER ADVICE

For further advice or information contact Heatline ™ Service Enquiries by telephone

Service : 0870 777 8341
Spares : 0870 777 8402
Technical Help Line : 0870 777 8318
E–mail via our web site: www.heatline.co.uk

48

49

NOTES :

3003202113-01