Saunier duval XEON 30 HE User Manual
Xeon 18 HE G.C. 41-920-38
Xeon 30 HE G.C. 41-920-46
Instructions for use
Installation and servicing
High Effi ciency Condensing Boiler
Guarantee Registration
Thank you for installing a new Saunier Duval appliance in your home.
Saunier Duval appliances are manufactured to the very highest standard so we are pleased to offer
our customers a Comprehensive Guarantee.
This product is guaranteed for 24 months from the date of installation or 30 months from the date of
manufacture, whichever is the shorter, for parts. In addition this product is guaranteed for 12 months
from the date of installation or 18 months from the date of manufacture, whichever is the shorter, for
labour.
The second year of the parts guarantee, from the beginning of the 13th month onwards after
installation or manufacture, is conditional upon the boiler having been serviced by a CORGI
registered gas installer,
in accordance with the manufacturer's recommendations. We strongly recommend regular servicing
of your gas appliance, but where the condition is not met, any chargeable spare parts or components
issued within the applicable guarantee period still benefit from a 12 month warranty from the date of
issue by the manufacturer.
We recommend you complete and return as soon as possible your guarantee registration card.
If your guarantee registration card is missing you can obtain a copy or record your registration by
telephoning the Saunier Duval Customer Service number below.
For customer service call:
01773 525 914
Technical helpline: 01773 828400
For General and Sales enquiries:
Tel. 0870 6064351
To register your Saunier Duval appliance call:
0800 073 2144
2
Contents
The instructions consist of three parts, User, Installation and Servicing
Instructions. The instructions are an integral part of the appliance and must,
to comply with the current issue of the Gas Safety (Installation and Use)
Regulations, be handed to the user on completion of the installation.
Important Information ..............................................................4
Contents
Manual
Handling .....................................................................6
Appliance Safety Devices - User Instructions .........................6
Maintenance and Servicing - User Instructions .......................7
Operating the Boiler ................................................................
1 Technical Information ............................................................ 10
2 Boiler Location and Ventilation ..............................................13
3 Flue Location and Ventilation ................................................ 14
4 Water System ........................................................................17
5 Installation Preparation .........................................................21
5 Boiler Fixing ..........................................................................22
7 Gas, Water and Condensate Connections ............................23
8 Flue Preparation Telescopic and Standard ........................... 26
9 Electrical Connections ...........................................................30
10 Commissioning ......................................................................33
10 Commissioning - Instructions to the User .............................36
9
11
Servicing ...............................................................................37
12 Fault Finding .........................................................................43
13 Replacement Parts ................................................................47
14 Spare Parts ...........................................................................53
3
WARNINGS
Gas Leak or Fault
Turn off the gas emergency control valve immediately. Eliminate all sources of ignition, i.e.
smoking, blowlamps, hot air guns etc. Do not operate electrical lights or switches either on or off.
Open all doors and windows, ventilate the area.
Sheet Metal Parts
This boiler contains metal parts (components) and care should be taken when handling and
Under no circumstances must the User interfere with or adjust sealed parts.
cleaning, with particular regard to edges.
Sealed Components
IMPORTANT INFORMATION
Gas Category
This boiler is for use only on G20 natural gas, but
the 30 HE may be converted for use on G31 gas
(Propane L.P.G.).
Gas Safety (Installation and Use)
Regulations
In your own interests and that of safety, it is the
Law that ALL gas appliances are installed by a
competent person in accordance with the current
issue of the above regulations.
Testing and Certification
The boiler is tested and certificated for safety and
performance. It is, therefore, important that no
alteration is made to the boiler unless approved,
in writing, by Saunier Duval. Any alteration not
approved by Saunier Duval, could invalidate the
certification, boiler warranty and may also infringe
the current issue of the statutory requirements.
CE Mark
This boiler meets the requirements of Statutory
Instrument, No. 3083 The Boiler (Efficiency)
Regulations, and therefore is deemed to meet
the requirements of Directive 92/42/EEC on the
efficiency requirements for new hot water boilers
fired with liquid or gaseous fuels.
Type test for purposes of Regulation 5 certified
by: Notified body 0087.
Product/production certified by: Notified body
0086.
The CE mark on this appliance shows compliance
with:
1. Directive 90/396/EEC on the approximation
of the laws of the Member States relating to
appliances burning gaseous fuels.
2. Directive 73/23/EEC on the harmonisation
of the Laws of the Member States relating to
electrical equipment designed for use within
certain voltage limits.
3. Directive 89/336/EEC on the approximation
of the Laws of the Member States relating to
electromagnetic compatibility.
Control of Substances Hazardous to
Health
Under Section 6 of The Health and Safety at Work
Act 1974, we are required to provide information
on substances hazardous to health.
The adhesives and sealants used in this appliance
are cured and give no known hazard in this
state.
4
Insulation Pads / Ceramic Fibre
These can cause irritation to skin, eyes and the
respiratory tract.
If you have a history of skin complaint you may
be susceptible to irritation. High dust levels are
usual only if the material is broken.
Normal handling should not cause discomfort, but
follow normal good hygiene and wash your hands
before eating, drinking or going to the lavatory.
If you do suffer irritation to the eyes or severe
irritation to the skin seek medical attention.
Electrical Supply
The boiler must be earthed.
All system components shall be of an approved
type and all wiring to current I.E.E. wiring
regulations.
External wiring must be correctly earthed, polarised
and in accordance with the relevant standards.
In GB this is BS 6891.
In IE this is the current edition of I.S.813 "Domestic
Gas Installations".
The boiler must be connected to a permanent
230V ac, 50Hz supply.
Connection of the whole electrical system of
the boiler, including any heating controls, to the
electrical supply must be through one common
isolator and must be fused 3 Amp maximum.
Isolation should be by a double pole switched
fused spur box, with a minimum gap of 3mm
for both poles. The fused spur box should be
readily accessible and preferably adjacent to the
appliance. It should be identified as to its use.
Alternatively connection can be made through an
unswitched shuttered socket and 3A fused 3-pin
plug both to the current issue of BS 1363 may
be used, provided they are not used in a room
containing a bath or shower.
The colours of three core flexible cable are,
blue - neutral, brown - live, green and yellow
- earth.
General Note
This boiler is designed to provide central heating
from a fully pumped open-vented or sealed water
system with a fully indirect cylinder.
Once the controls are set the boiler operates
automatically.
Please read these instructions and follow them
carefully for the correct installation and economical
use of your boiler.
Water Treatment
In the case of an existing installation, it is
ESSENTIAL that prior to installing the new boiler
the system is thoroughly flushed. For optimum
performance after installation of a new system,
the boiler and its associated central heating
system should also be flushed. Flushing should
be carried out in accordance with BS7593: 1992
using a cleanser such as Sentinel X300 or X400,
Fernox Superfloc or Salamander corrosion guard
cleaner.
For long-term corrosion protection, after flushing,
an inhibitor suitable for stainless steel exchangers
should be used, refer to the current issue of BS
5449 and BS 7593 on the use of inhibitors in central
heating systems. Examples are Sentinel X100
Fernox or Salamander corrosion guard inhibitor.
Compartment or Cupboard Installations
If the boiler is fitted into a compartment or cupboard
it does not require ventilation openings.
Do not use the compartment or cupboard for
storage.
Clearances
If fixtures are positioned close to the boiler, space
must be left as shown in diagram 2.1. Enough
space must also be left in front of the boiler to
allow for servicing.
Contents
5
Condensate Drain
The condensate drain, see section 7.3, must not
be modified or blocked.
Pluming from flue terminal
Like all condensing boilers this appliance will
produce a plume of condensation from the flue
terminal in cool weather. This is due to the high
efficiency and hence low flue gas temperature
of the boiler. It is normal and not a fault
indication.
Cleaning
The boiler casing can be cleaned using a mild
liquid detergent with a damp cloth, then a dry
cloth to polish.
Do not use any form of abrasive or solvent cleaner
as you may damage the paintwork.
Electrical Supply
If the mains electricity and gas are to be turned
off for any long periods during severe weather, it
is recommended that the whole system, including
the boiler, should be drained to avoid the risk of
freezing. Make sure that, if fitted, the immersion
heater in the cylinder is switched off.
NOTE: If you have a sealed water system contact
your installation/servicing company as draining,
refilling and pressurising MUST be carried out by
a competent person.
MANUAL HANDLING
IMPORTANT: With regards to the Manual
Handling Operations, 1992 Regulations, the
following lift operation exceeds the recommended
weight for a one man lift.
General recommendations when
handling
Clear the route before attempting the lift.
Ensure safe lifting techniques are used – keep
back straight – bend using legs.
Keep load as close to body as possible.
Do not twist – reposition feet instead.
If 2 persons performing lift, ensure co-ordinated
movements during lift.
Avoid upper body/top heavy bending - do not lean
forward/sideways.
Recommend wear suitable cut resistant gloves
with good grip to protect against sharp edges and
ensure good grip.
Always use assistance if required.
APPLIANCE SAFETY DEVICES
- USER INSTRUCTIONS
Electrical Supply Failure Reset
Switch
The boiler will not work without an electrical
supply.
Normal operation of the boiler should resume
when the electrical supply is restored.
Reset any external controls, to resume normal
operation of the central heating.
If the boiler does not resume normal operation turn
the mains reset switch off and on. If the boiler
does not resume normal operation after this the
overheat stat may have operated.
Overheating Safety
In the event of the boiler overheating the
safety devices will cause a safety shutdown.
If this happens, call your Installation/Servicing
company.
Frost Protection
The appliance has a built in frost protection
programme as long as the electricity and gas are
left switched on.
This device operates the burner and system
pump when the temperature inside the boiler
falls to 3°C.
Any other exposed areas of the system should be
protected by a separate frost thermostat.
6
Condensate Drain Blockage
As a safety feature the boiler will stop working if
the condensate drain becomes blocked. During
freezing conditions this may be due to the forming
of ice in the condense drain external to the house.
Release an ice blockage by the use of warm
cloths on the pipe. The boiler should then restart.
Contact your installation/servicing company if the
fault persists.
MAINTENANCE AND SERVICING
- USER INSTRUCTIONS
For the continued efficient and safe operation of
the boiler it is recommended that it is checked
and serviced at regular intervals. The frequency
of servicing will depend upon the installation
conditions and usage, but in general, once a year
should be enough.
If this appliance is installed in a rented property
in the UK there is a duty of care imposed on the
owner of the property by the current issue of the
Gas Safety (Installation and Use) Regulations,
Section 35.
Servicing/maintenance should be carried out by a
competent person in accordance with the rules
in force in the countries of destination.
To obtain service, please contact Saunier Duval’s
own service organisation using the telephone
number on the front cover of this booklet.
Please be advised that the installation engineer
on completion of commissioning and servicing
should complete the Benchmark logbook.
All CORGI Registered Installers carry a CORGI
ID card, and have a registration number. Both
should be recorded in your boiler Logbook. You
can check your installer is CORGI registered by
calling CORGI direct on: - 01256 372300.
Spare Parts
REMEMBER: When replacing a part on this
appliance, use only spare parts that you can be
assured conform to the safety and performance
specificatio n t hat we require. Do not use
reconditioned or copy parts that have not been
clearly authorised by Saunier Duval.
If replacement parts are required contact
Saunier Duval’s own service organisation using
the telephone number on the front cover of this
booklet.
Please quote the name of the appliance, this
information will be on the name badge on the
front of the appliance.
If in doubt seek advice from Saunier Duval’s own
service organisation using the telephone number
on the inside front cover of this booklet.
Contents
7
1
5
1. Digital Display
2. Control Light
2
3
12041
4
3. Mains Reset Switch
4. Central Heating Water Temperature Control Knob
5. Controls Fascia
Diagram 1
8
Operation of the Boiler
Sealed Water Systems
CAUTION: A sealed water system must be filled and pressurised by a competent person.
Only light the boiler when you are sure that the system and boiler have been filled and pressurised.
The pressure should read at least 0.7 bar, anything less than this figure could indicate a leak and
you MUST contact your installer or Saunier Duval’s own Customer Care Line using the telephone
number on page two of this booklet. Do not operate the boiler without water.
All Systems
Check that the electrical supply to the boiler is ON at the external isolator.
Set any remote controls as required.
User Controls
• Slide the mains reset switch to the ON position (I).
The control light will illuminate (green) indicating the boiler is lit, diagram 1.
• The temperature of the central heating water can be adjusted by turning the central heating water
temperature control knob
to desired setting between ‘Min’ and ‘Max’, diagram 1.
‘Max’
The digital display, diagram 1, shows the temperature of the appliance when the
A fault is indicated by a RED flashing control light and flash fault code on digital display.
• Slide the mains reset switch to 0. Wait for 5 seconds.
If the fault persists contact your installer/service provider.
It should be noted that this is a fan flue appliance and fan operation may be heard.
• There is a mains reset switch on the right hand side of the controls fascia.
However, it is preferable to leave the electrical supply on whenever possible to permit
operation of the built-in frost protection.
is approximately 82°C (180°F)
appliance is running and in standby.
To Reset
Slide mains reset switch to I.
To Turn the Boiler Off
for qualified gas installers
Installation and servicing instructions strictly reserved
9
1 TECHNICAL INFORMATION
1.1 Important Notice
The boiler is supplied in one carton,
which includes a fittings and
documentation pack.
This boiler is for use only on G20 NATURAL GAS,
but the 30 HE may be converted for use on G31
gas (Propane L.P.G.).
Where no British Standards exists, materials and
equipment should be fit for their purpose and of
suitable quality and workmanship.
The installation of this boiler must be carried out
by a competent person in accordance the rules
in force in the countries of destination.
1.2 Statutory Requirements
The appliance is suitable only for installation in
GB and IE and should be installed in accordance
with the rules in force.
In GB the installation of the boiler must be carried
out by a competent person as described in the
following regulations:
The manufacturer’s instructions supplied.
Th e Gas Saf et y (I nst al lat io n an d Use)
Regulations.
The appropriate Buildings Regulations either The
Building Regulations, The Building Regulations
(Scotland), The Building Regulations (Northern
Ireland).
The Water Fittings Regulations or Water byelaws
in Scotland.
The Health and Safety at Work Act, Control of
Substances Hazardous to Health (COSHH).
The Current I.E.E. Wiring Regulations.
Where no specific instructions are given, reference
should be made to the relevant British Standard
Code of Practice.
In IE, the installation must be carried out by a
competent person and installed in accordance
with the current edition of I.S.813 “Domestic Gas
Installations”, the current Building Regulations and
reference should be made to the current ETCI
rules for Electrical Installation.
In GB the following Codes of Practice apply:
BS4814, BS6798, BS5440 Part 1 and 2, BS5546
Part 1, BS5449, BS6891, BS6700, BS7074 Part
1 and 2, BS7593, BS7671.
In IE: I.S.813, BS5546, BS 5449, BS 7074, BS
7593.
Manufacturer’s instructions must not be taken as
overriding statutory requirements.
NOTE: For further information, see the current
issue of the Building Regulations, approved
document L1 ( in the UK) and the references:
1) GIL 59, 2000: Ce ntral heati ng system
specification (CheSS) and
2) GPG 302, 2001: Controls for domestic central
heating system and hot water. BRECSU.
Certification
This boiler certificated to the current issue of EN
483 for performance and safety.
It is important that no alteration is made to the
boiler, without permission, in writing, from
Saunier Duval.
Any alteration that is not approved by
Saunier Duval, could invalidate the warranty and
could also infringe the current issue of the Statutory
Requirements.
10
600 MAX.
87 MIN.
INSIDE WALL
FIXING FACE
176
334
33
48
12566
113.5
53
76
CONDENSATE
DRAIN
TABLE 1
TOTAL WEIGHT 18 HE = 31 kg
30 HE = 33 kg
GAS CONNECTION Rc1/2in. (1/2in. BSPT)
WATER CONNECTION 22mm. copper
ELECTRICITY SUPPLY 23V~50HZ FUSED 3A
ELECTRICAL RATING 60W
INTERNAL FUSE RATE MAIN PCB 630mAT
48
73
GAS
600
GAS
133
375
CONDENSATE
DRAIN
30
13
54
Diagram 1.1
1.3 Gas Supply
The gas installation shall be in accordance with
the relevant standards.
In GB this is BS6891.
In IE this is the current edition of I.S.813 “Domestic
Gas Installations”.
The supply from the governed meter must be of
adequate size to provide a steady inlet working
pressure of 20mbar (8in wg) (Propane G31,
37mbar) at the boiler.
On completion, test the gas installation for
soundness using the pressure drop method and
suitable leak detection fluid, purge in accordance
with the above standard.
for qualified gas installers
Installation and servicing instructions strictly reserved
11
1.4 Technical Data
All dimensions are given in millimetres (except
as noted).
See diagram 1.1 and Tables 1 and 2.
The data label is positioned on the inner door,
refer to diagram 1.2.
The Seasonal Efficiency Domestic Boilers UK
(SEDBUK) is: All HE boilers: Class ‘A’.
The value is used in the UK Government’s
Standard Assessment Procedure (SAP) for energy
rating of dwellings. The test data from which it has
been calculated has been certified by B.S.I.
Xeon 18 HE
TABLE 2
BURNER %CO
BURNER %CO
18 HE
Case Off 9.1 + 0.2 - 0.5
2
Case On 9.3 + 0.3 - 0.5
2
MIN. MAX.
3
APPROXIMATE m
/h 0.53 2.0
GAS RATE
(after 10 mins. ft3/h 18.7 70.06
from cold)
BURNER %CO
BURNER %CO
30 HE
Case Off 9.1 + 0.2 - 0.5
2
Case On 9.3 + 0.3 - 0.5
2
MIN. MAX.
APPROXIMATE m3/h 0.56 3.02
GAS RATE
(after 10 mins. ft3/h 19.8 107
from cold)
12567
BURNER %CO
BURNER %CO
30 HE LPG
Case Off 10.5 + 0.3 - 0.7
2
Case On 10.7 + 0.3 - 0.7
2
MIN. MAX.
APPROXIMATE m3/h 0.56 3.02
GAS RATE
(after 10 mins. ft3/h 19.8 107
from cold)
1.5 Condensate Drain
A plastic drain pipe must be fitted to allow discharge
of condensate to a drain.
Condensate should, if possible, be 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, see Section 7.3
for more detail.
Xeon 30 HE
Diagram 1.2
12
2 BOILER LOCATION AND
VENTILATION
2.1 Boiler Location
Th is bo ile r is no t suita ble for o ut doo r
installation.
This boiler may be installed in any room, although
particular attention is drawn to the installation of
a boiler in a room containing a bath or shower
where reference must be made to the relevant
requirements.
This boiler is suitable for installation in bathroom
zones 2 and 3.
In GB this i s the curre nt I.E.E. WIRING
R E G U L A T I O N S a n d B U I L D I N G
REGULATIONS.
In IE reference should be made to the current
edition of I.S.813 “Domestic Gas Installations”
and the current ETCI rules.
The boiler must be mounted on a flat wall, which
is sufficiently robust to take its total weight, see
Table 1. Section 1.
2.2 Clearances
The boiler should be positioned so that at least
the minimum operational and servicing clearances
are provided, see diagram 2.1.
Additional clearances may be beneficial around
the boiler for installation and servicing.
For flue installations where external access is not
practicable, consideration should be given for the
space required to insert the flue internally, which
may necessitate clearance larger than those
specified in diagram 2.1.
2.4 Room Ventilation
The boiler is room sealed, so when it is installed
in a room or space, a permanent air vent is not
required.
2.5 Compartment Ventilation
Due to the high efficiency and hence low
casing temperature of this boiler, cupboard or
compartment ventilation is not necessary.
Leave existing air vents.
12567
for qualified gas installers
2.3 Timber Frame Buildings
If the boiler is to be installed in a timber frame
building it should be fitted in accordance with
the Institute of Gas Engineers document IGE/
UP/7/1998. If in doubt seek advice from the local
gas undertaking or Saunier Duval.
Installation and servicing instructions strictly reserved
Diagram 2.1
13
3 FLUE LOCATION AND
VENTILATION
3.1 Flue Position and Length
The maximum permissible horizontal flue length
is 10 metres plus the flue terminal, this can be
achieved by use of the accessories, however
should additional 90° or 2 x 45° elbows be used
then the length MUST be reduced by 1 metre.
The diagrams 3.1 to 3.4 describe the lengths
achievable without the use of extensions or
elbows.
An elevated flue system can be installed with the
addition of a vertical flue adapter, extension kits,
and elbow, see section below, Flue Options.
When extension pipes are used the flue system
must be designed to have a continuous fall to the
boiler of at least (44mm for every 1M) to allow
condensate to run out via the drain.
3.2 Internal Flue Installation
The flue can be installed from inside the building
when access to the outside wall face is not
practicable.
3.3 Flue Options
There are various flue systems to choose from,
as follows:
Horizontal telescopic flue pack
- Pt. No. A2045000
Standard flue pack
- Pt. No. A2044900
Black terminal
- Pt. No. A2045100
Telescopic flue extension 0.5-0.8m
- Pt. No. A2032800
Vertical flue adaptor - Pt. No. A2045100
Vertical flue terminal kit - Pt. No. A2032300
2 Metre Extension Kit - Pt. No. A2032700
1 Metre Extension Kit - Pt. No. A2032600
0.5 Metre Extension Kit - Pt. No. A2032500
Adjustable Flue Pipe 0-50 mm
Kit - Pt. No. A2033100
45° Flue Bend Pack - Pt. No. A 2033000
90° Flue Bend Pack - Pt. No. A 2032900
Additional accessories are available.
See “Flue Options Guide” for configurations
available.
14
L
FLUE
C
Max flue length 717mm
136
239
20mm
min.
clearance
“A”
Max. distance from
outside wall face to
min clearance.
LH - 458mm
RH - 561mm
Min. distance from
outside wall face to
min clearance.
LH - 75mm
RH - 75mm
OUTSIDE
WALL FACE
87min.
NOTE. If necessary, it is permitted to
increase this dimension up to 600mm max.
INTERNAL
SURFACE
“A”
L
FLUE
C
Max flue length 589mm
136
239
20mm
min.
clearance
“A”
Max. distance from
outside wall face to
min clearance.
LH - 330mm
RH - 433mm
Min. distance from
outside wall face to
min clearance.
LH - 125mm
RH - 228mm
OUTSIDE
WALL FACE
87min.
NOTE. If necessary, it is permitted to
increase this dimension up to 600mm max.
INTERNAL
SURFACE
“A”
WALL THICKNESS
BOILER
MOUNTING WALL
OUTSIDE
WALL FACE
75 min. to 540 max.
87min.
112
176
NOTE. If necessary, it is permitted to
increase this dimension up to 600mm max.
FLUE
L
C
WALL THICKNESS
BOILER
MOUNTING WALL
OUTSIDE
WALL FACE
208 min. to 413 max.
87min.
112
176
NOTE. If necessary, it is permitted to
increase this dimension up to 600mm max.
FLUE
L
C
12744
12746
Top rear flue - telescopic
Top side flue - telescopic
Diagram 3.1
Diagram 3.2
Top rear flue - standard
12745
Top side flue - standard
Diagram 3.3
12747
for qualified gas installers
Installation and servicing instructions strictly reserved
Diagram 3.4
15
3.4 Terminal Position
The minimum acceptable siting dimensions for
the terminal from obstructions, other terminals
and ventilation openings are shown in diagram
3.5. Dimensions shown are measured from edge
of terminal.
The terminal must be exposed to the external
air, allowing free passage of air across it at all
times.
Being a condensing boiler some pluming may
occur from the flue outlet. This should be taken
into consideration when selecting the position for
the terminal.
NOTE: If necessary it is permitted to increase
the terminal protrusion through the outside wall
to greater than the minimum dimension of 87mm
but no more than 600mm, see diagram 1.1.
F‡ and L‡ See diagram 3.5 . Carports or similar
extensions of a roof only, or a roof and one wall,
require special consideration with respect to any
openings, doors, vents or windows under the roof.
Care is required to protect the roof if made of plastic
sheeting. If the carport comprises of a roof and
two of more walls, seek advice from the local gas
supply company before installing the boiler.
H* and J* See diagram 3.5 . These dimensions
comply with the building regulations, but they
may need to be increased to avoid wall staining
and nuisance from pluming depending on site
conditions.
Plume Diverter Kit: Part No. A2045400 can be
used to overcome many site issues.
12570
Minimum siting dimensions
for fanned flue terminals MM
Horizontal Flues
A Directly below an opening,
air brick, opening windows. 300
B Above an opening air brick,
opening windows. 300
C Horizontally to an opening,
air brick opening window. 300
D Below gutter, drain soil pipe. 25
E Below eaves. 25
F‡ Below a balcony or car port. 25
G From vertical drain pipes,
soil pipes. 25
H From internal / external corners. 25
H* To a boundary alongside
the terminal. 300
I Above adjacent ground
or balcony. 300
J* From surface or a boundary
facing the terminal. 600
K Facing the terminals. 1200
L‡ From opening (door / window)
in car port into dwelling. 1200
M Vertical from a terminal. 1500
N Horizontally from a terminal. 300
Vertical Flues
P From another terminal. 600
Q Above roof level. 300
R From adjacent opening window. 1000
S From adjacent wall to flue. 300
Diagram 3.5
16
3.5 Terminal Guard
A terminal guard is required if persons could come
into contact with the terminal or the terminal could
be subject to damage.
If a terminal guard is required, it must be positioned
to provide minimum of 50mm clearance from
any part of the terminal and be central over the
terminal.
The guard should be similar to that shown in
diagram 3.6.
A suitable guard is manufactured by:
Tower Flue Components
Morley Rd.
Tonbridge
Kent
TN9 1RA
Size: 280mm x 280mm x 270mm.
12571
4 WATER SYSTEM
4.1 Draining Tap
A draining tap must be provided at the lowest point
of the system, which will allow the entire system
and hot water system to be drained.
Draining taps shall be to the current issue of BS
2879.
4.2 Safety Valve
A safety valve need not be fitted to an openvented system.
4.3 Pump
The pump should be fitted on the flow pipe from
the boiler and have isolating valves each side.
A variable duty pump should be set to give a
temperature difference of no greater than 20°C
between the flow and return, with the thermostat
set at “MAX”, which is about 80°C, to give a flow
rate as shown in table 3.
See chart for pressure loss of the boiler, diagram
4.1.
High resistance microbore systems may require
a higher duty pump.
Terminal Guard
Diagram 3.6
4.4 Flow Rate
If it is necessary to alter the flow rate, the system
can be fitted with a lockable balancing valve in
the main flow or return pipes shown as valve “A”
in diagram 4.3. The flow rate through the boiler
must not be allowed to fall below that given in
Table 3.
TABLE 3 FLOW RATE
MODEL MINIMUM FLOW RATE
18 HE 777.8 LITRES/HR
30 HE 1220 LITRES/HR
This is equal to 20ºC differential at
maximum heat input
17
for qualified gas installers
Installation and servicing instructions strictly reserved
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