Glowworm Hideaway 40C FF Operating manual

Hepworth Heating Ltd.,
Nottingham Road, Belper, Derbyshire. DE56 1JT
General/Sales enquiries:
Tel: [phone] Fax: [phone]
One Contact Local Service
Customer Services:
Tel: [phone]
Fax: [phone]
2000225005B.03.02
All replacement parts
All labour charges
All call-out charges
Thank you for installing a new Glow-worm appliance in your home.
Glow-worm appliances' are manufactured to the very highest standard so we are pleased
to offer our customers' a Comprehensive First Year Guarantee.
In the centre pages are to be found your Guarantee Registration Card, which we recommend you complete and
return as soon as possible.
If this card is missing you can obtain a copy or record your registration by telephoning the Heatcall Customer
Service number 01773 828100.
Our Guarantee gives you peace of mind plus valuable protection against breakdown by covering the cost of:
Guarantee Registration
Chimney
Fanned Flue Boiler
This is a Cat I2H Appliance
Reference in these instructions to British Standards and Statutory
Regulations/Requirements apply only to the United Kingdom.
For Ireland the rules in force must be used.
The instructions consist of three parts, User, Installation and Servicing Instructions, which includes the Guarantee Registration
Card. 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.
To be left with the user
❏
✔
❏
✔
❏
✔
Instructions for Use
Installation and Servicing
REGISTER YOUR GLOW-WORM APPLIANCE
FOR 1ST YEAR GUARANTEE PROTECTION
CALL 0208 247 9857
Hideaway 40C FF
G.C. No. 41-047-38
9706
Hideaway 50C FF
G.C. No. 41-047-39
Hideaway 60C FF
G.C. No. 41-047-40

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2000225005B
TESTING AND CERTIFICATION
This boiler is tested and certificated for safety and performance. It is therefore important that no alteration is made to the boiler, without
permission, in writing, from Hepworth Heating Ltd.
Any alteration not approved by Hepworth Heating Ltd., could invalidate the certification, boiler warranty and may also infringe the
current issue of the Statutory Requirements, see Section 1.3.
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 0086.
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 harmonization of the Laws of the Member States relating to the 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.
INFORMATION FOR THE INSTALLER AND SERVICE ENGINEER.
Under Section 6 of The Health and Safety at Work Act 1974, we are required to provide information on substances hazardous to
health.
Ceramic Fibre/Insulation Pads, GlassYarn.
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 of the eyes or severe
irritation to the skin seek medical attention.
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 specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Hepworth
Heating Ltd.
MANUAL HANDLING GUIDANCE
During the appliance installation and the replacement of the heat exchanger it will be necessary to employ caution and assistance
whilst lifting as the appliance or component exceeds the recommended weight for a one man lift.
In certain situations it may be required to use a mechanical handling aid.
Take care to avoid trip hazards, slippery or wet surfaces.
Important Information
Introduction 3
Lighting the Boiler 4
General Data 1 5
Water Systems 2 8
Flue & Ventilation 3 9
Installation 4 11
Electrical Wiring 5 16
Commissioning 6 17
Instructions to User 7 19
Servicing 8 19
Fault Finding 9 23
Replacement Parts 10 26
Spare Parts 11 28
CONTENTS DESCRIPTION SECTION PAGE No.
INSTRUCTIONS
FOR USE
INSTALLATION
INSTRUCTIONS
SERVICING
INSTRUCTIONS

32000225005B
Instructions for Use
Introduction
Please read these instructions and follow them carefully for the
safe and economical use of your boiler.
The Glow-worm Hideaway C FF series are fanned flue boilers
with a chimney flue adapter. They provide heating and if
required, an indirect domestic hot water supply.
The boiler is automatic in operation, having only one user
control, the boiler temperature control.
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.
WARNINGS
Gas Leak or Fault
If a gas leak fault exists or is suspected the boiler must be
turned off, including the electrical supply and must not be
used until the fault has been put right. Advice/help should
be obtained from the local gas undertaking or your
installation / servicing company.
Clearances
Make sure that nothing obstructs the ventilation grills or
clearances.
Minimum clearances must be left around the boiler as
shown in diagrams 1.6, 1.7 & 1.8.
Sheet Metal Parts
This boiler contains metal parts (components) and care
should be taken when handling and cleaning, with particular
regard to edges.
Cleaning
Keep the casing clean by wiping it occasionally with a damp
soapy cloth and dry with a polishing cloth.
Do not use abrasive cleaners.
Boilers Installed in a Compartment
If the boiler is fitted in a compartment, cupboard etc., do not
obstruct the purpose built compartment vents or the grill on the
boiler.
Do not use the compartment for storage purposes.
Protection Against Freezing
If the boiler is to be out of use for any period of time during severe
weather conditions we recommend the whole system including
the boiler, be drained off to avoid the risk of freezing up. If an
immersion heater is fitted to the hot water cylinder make sure it
is switched off.
Maintenance
To ensure the continued efficient and safe operation of the boiler
it is recommended that it is checked and serviced as necessary
at regular intervals. The frequency of servicing will depend upon
the particular installation conditions and usage, but in general
once a year should be enough.
It is the law that servicing must be carried out by a competent
person.
If this appliance is installed in a rented property 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.
To obtain service please call your installer or Heatcall (Glow-
worm’s own service organisation) using the telephone number
given on the inside of the front panel.
Please be advised that the ‘Benchmark’ logbook should be
completed by the installation engineer on completion of
commissioning and servicing.
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.
Boiler Electrical Supply
THIS BOILER MUST BE EARTHED.
The boiler must only be connected to a 230V~50Hz supply
protected by a 3A fuse, maximum.
All wiring must be in accordance with the current issue of
BS7671.
Heat resistant flexible cable having a conductor size of 0.75mm2,
to the current issue of BS6500 Table 16 must be used.
To Connect an Electrical Plug
The standard colours of three core flexible cable are,
Brown - live, Blue - neutral, Green and Yellow - earth.
As the markings on your plug may not correspond with these
colours, continue as follows:
The Blue cable must be connected to the terminal marked “N”
or “Black”.
The Brown cable must be connected to the terminal marked “L”
or “Red”.
The Green and yellow cable must be connected to the terminal
marked “E” or “Green” or the earth symbol .

4
2000225005B
To Turn the Appliance On
Turn the electrical supply on to the boiler and check that all
remote controls are calling for heat.
Turn the boiler temperature control clockwise to any position
between “0” and "Max", see diagram 1.
"Max" is approximately 82°C (180°F).
The boiler lighting operation is now automatic as follows:
The fan operates and after a short period of time, the spark
ignition operates, the solenoid opens, then the burner will light
shown by the burner ON neon (green) on the control panel
lighting up.
The burner will remain alight until switched off by the control
thermostat or any remote control.
Note: If the boiler is turned OFF at the boiler temperature
control, wait at least 30 seconds before switching on again.
When the boiler switches off, the burner will go out.
The automatic lighting sequence will operate again when heat
is required.
It should be noted that this is a fanned flue appliance and fan
operation may be heard.
If the reset neon lights, turn the boiler temperature control to "0"
(off), wait 30 seconds, then repeat the lighting instructions.
To Turn the Appliance Off
For short periods, turn the boiler temperature control fully anti-
clockwise to “0” (off).
To relight, turn the boiler temperature control to any position
between “0” and “Max”.
For longer periods, turn the boiler temperature control fully anti-
clockwise to “0” (off) and switch off the electrical supply to the
boiler.
To relight follow the lighting sequence given above.
Instructions for Use
Diagram 1
BOILER
TEMPERATURE
CONTROL
9857
"BURNER ON"
NEON
RESET
NEON
"OFF"
POSITION

52000225005B
1 General Data
Important Notice
This boiler is for use only on G20 gas.
Wherever possible, all materials, appliances and components to
be used shall comply with the requirements of applicable British
Standards.
Where no British Standard exists, materials and equipment
should be fit for their purpose and of suitable quality and
workmanship.
Refer to Manual Handling Operations, 1992 Regulations.
Sheet Metal Parts
WARNING. When installing or servicing this boiler, care should
be taken to avoid any possibility of personal injury when handling
the edges of sheet metal parts.
1.1 Technical Data
Refer to diagrams 1.1, 1.2, 1.3 and 1.4.
All dimensions are given in millimetres (except as noted)
.
Approximate weight of complete boiler : 99kg (218lb)
Water content : 5.76 litre (1.27gallons)
Gas connection : Rc1/2(1/2in BSPT)
Water connection : Rc1 (1in BSPT)
Electrical supply : 230V~50Hz, fused 3A
Burner : Aeromatic
A B C D E F G H J K L M
300 115 558 294 384 555 440 3 Max 900/ 300 80 32
Min 860
GENERAL DIMENSIONS - given in millimetres Diagram 1.1
10079
WATER CONNECTIONS
Rc1 (1in. B.S.P.T.)
WATER CONNECTIONS
Rc1 reduced with
DISTRIBUTOR TUBE to
Rc 3/4(3/4in. B.S.P.T.)
(pumped return)
GAS CONNECTION
Rc 1/2(1/2in. B.S.P.T.)
The Seasonal Efficiency Domestic Boilers UK (SEDBUK) is "D"
40C FF - 78.2% 50C FF - 78.4% 60C FF - 78.4%.
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 have been certified by B.S.I.
1.2 Range Rating
See diagrams 1.2, 1.3 & 1.4 for boiler ratings.
A
C
D
H
B*
F
G
E
J
K
LNOTE:
The boiler casing can be set
at two heights, MAX.or MIN.
M
Diagram 1.2
10075
*
C
L
INSIDE DIAMETER OF
ADAPTOR FOR 100mm (4in.)
NOMINAL DIAMETER FLUE
TO BS567

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2000225005B
1.3 Statutory Requirements
The installation of this appliance must be carried out by a
competent person and must be in accordance with the relevant
requirements of the current issue of:
Manufacturer’s instructions supplied.
The Gas Safety (Installation and Use) Regulations, Building
Regulations, Local Water Company Bye-laws, The Building
Standards (Scotland) Regulations, (applicable in Scotland),
Health and Safety at Work Act, Control of Substances Hazardous
to Health, Electricity at Work Regulations and any applicable
local regulations.
Detailed recommendations are contained in the current issue of
the following British Standards and Codes of Practice,
BS6891, BS5440 Part 1 and 2, BS6798, BS5449, BS5546,
BS6700, BS7478, BS7593, BS7671.
Manufacturer’s instructions must not be taken as overriding
statutory requirements.
1.4 B.S.I Certification
This boiler is certificated by B.S.I., for safety and performance.
It is, therefore, important that no alteration is made to the boiler
unless agreed, in writing, by Hepworth Heating Ltd.
Any alteration not approved by Hepworth Heating Ltd., could
invalidate the B.S.I. certification, boiler warranty and could
infringe the current issue of the Statutory Requirements.
1.5 Gas Supply
The gas installation should be fitted in accordance with the
current issue of BS6891.
The supply from the governed meter must be of adequate size
to provide a steady inlet working pressure of 20mbar (8in wg) at
the boiler.
On completion test the gas installation using the pressure drop
method and suitable leak detection fluid, purge in accordance
with the current issue of BS6891.
1.6 Electrical
WARNING. This boiler must be earthed.
The electrical installation must be carried out by a competent
person. All external components shall be of the approved type
and shall be connected in accordance with the current issue of
BS7671 and any local regulations which apply.
Connection of the boiler and any system controls to the mains
supply through an unswitched shuttered socket outlet and 3A
fused 3 pin plug, both to the current issue of BS1363. Alternatively,
a 3A fused double pole isolating switch may be used, having a
minimum double pole contact separation of 3mm, serving only
the boiler and system controls.
Heat resistant cable of at least 0.75mm2(24/0.20mm), to the
current issue of BS6500 Table 16, must be used for all connections
within the boiler casing, to the control box, pump etc.
1.7 Condensate Drain
A plastic drain pipe may need to 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 4.10 for more details.
BOILER CASING HEIGHT(S) Diagram 1.5
BOILER CASING
ALTERNATIVE
HEIGHT
POSITIONS
MIN.
MAX.
To
floor
level
FLOOR LEVEL
9710
1 General Data
MAX.900
MIN. 860
Diagram 1.4
10077
Diagram 1.3
10076

72000225005B
FRONT CLEARANCE Diagram 1.8
9713
700
BOILER
WALL OR
FIXTURE
1 General Data
1.8 Boiler Location
This boiler is not suitable for outside installation.
The boiler casing can be fitted at two heights. Refer to
diagram 1.5.
The boiler is assembled at the factory with the control box and
heat shield fitted in the lower position.
The boiler must stand on a level floor, conforming with local
authority requirements and building regulations.
The base temperature is within the requirements of the current
issue of BS5258. The boiler may stand on a wooden floor but
a metal base plate is required to protect plastic tiles and similar
floor coverings.
Suitable installation clearance needs to be available at the
sides of the boiler to facilitate direct connection of pipework and
making good around the flue assembly. The actual clearance
required will vary with site conditions.
When the boiler is to be installed level with work surfaces,
minimum clearances should be provided as shown in diagram
1.6. Work tops which overhang the cupboard sides, almost in
contact with the casing top, require a larger minimum air gap.
Flush sided fixtures require the same overall minimum space
but can have a reduced air gap on one side.
Boilers to be installed under work tops or fixtures, should be
positioned to provide minimum clearances as shown in diagram
1.7. To facilitate minimum clearances it may be necessary to
modify kitchen units and fixtures.
Combustible material must be 25mm (1in) away from flue
components see diagram 1.7.
A front access clearance for servicing, should be provided as
shown in diagram 1.8.
The boiler must not be installed in a room used or intended to
be used as sleeping accommodation or a room containing a
bath or shower.
Where the installation of the boiler will be in an unusual location,
special procedures are necessary the current issue of BS6798
gives detailed guidance on this aspect.
A compartment used to enclose the boiler must be designed
and constructed specifically for this purpose. An existing
cupboard or compartment modified for the purpose may be
used. Details of essential features of cupboard or compartment
design are given in the current issue of BS6798.
If the boiler is to be installed in a compartment, make sure that
nothing will obstruct the openings/vents in the compartment.
1.9 Heating System Controls
The heating system should have installed: a programmer and
room thermostat controlling the boiler.
Thermostatic radiator valves may be installed, however they
must not be fitted in a room where the room thermostat is
located.
Note: For further information, see the current issue of the
Building Regulations, approved document L1, and the
references:
1) GIL 59, 2000: Central heating system specification (CheSS)
and
2) GPG 302, 2001: Controls for domestic central heating
system and hot water. BRECSU.
Diagram 1.6
Diagram 1.7
MINIMUM CLEARANCES
LEVEL WITH WORKTOP
MINIMUM CLEARANCES
UNDER WORKTOP, FIXTURES
9711
320 MIN.
320 MIN.
CUPBOARDS
WORKTOP
10081
10 10
10 10
CUPBOARD
CUPBOARD
10
WORKTOP
OR FIXTURE
BOILER
BOILER
5
25

8
2000225005B
Diagram 2.2
FULLY PUMPED SYSTEM
(DIAGRAMMATIC)
2 Water Systems
0870
1 metre
MIN.
27metres
MAX.
PUMP
Heating
Circuit
TO INDIRECT
CYLINDER
22mm VENT
15mm
COLD FEED
Distributor tube in
pumped return
connection
BOILER
C
L
DRAIN OFF
COCK
2.1 Water Pressure Head
The boiler shall only be connected to a cistern water supply with
a minimum head of 1metre (3ft3in) and a maximum head of
27metres (90ft) which has an open vent in the system.
The working pressure must be within the range 0.1bar to 2.7bar
(1.3 to 39lbftin2).
The boiler MUST NOT be connected to a sealed water system.
2.2 Inhibitor
Attention is drawn to the current issue of BS5449 and BS7593
on the use of inhibitors in central heating systems.
If an inhibitor is to be used in the system, contact should be
made with the inhibitor manufacturers so that they can
recommend their most suitable product.
When using in an existing system take special care to drain the
entire system, including the radiators, then thoroughly clean out
before fitting the boiler whether or not adding an inhibitor.
2.3 Gravity Domestic and Pumped Heating
It is recommended that a cylinder thermostat is used to prevent
the stored water temperature becoming unnecessarily high
when the central heating pump is off.
The domestic primary flow and return must be 28mm o.d. The
installation must comply with the current issue of BS5546 and
BS6700, see diagram 2.1.
If the above conditions cannot be met, it is suggested that a fully
pumped system be used.
2.4 Pumped Heating and Hot Water
Where a single flow and return is taken from the boiler, a
minimum static head of 1metre (3ft3in) must be provided
between the water line of the feed tank and the centre of the
waterway, see diagram 2.2.
2.5 Circulation Pump
Normally the pump should be set to give a temperature difference
of 11oC (20oF) across the boiler. At the appropriate pumped flow
rate the pressure loss through the boiler can be found from the
graph, diagram 2.3.
Use a pump with integral valves or fit isolating valves as close
to the pump as possible.
2.6. Cylinder
For all systems supplying domestic hot water the cylinder must
be indirect.
2.7 Safety Valve
A safety valve need not be fitted to an open vented system.
2.8 Draining Tap
A draining tap must be provided at the lowest points of the
system which will allow the draining of the entire system,
including the boiler and hot water cylinder.
Draining taps should be to the current issue of BS2879.
2.9 Thermostatic Radiator Valves
If thermostatic radiator valves are fitted care must be taken to
ensure that there is an adequate flow rate through the boiler
when they close, refer to the current issue of BS7478 for
guidance. If fitted to all radiators ensure a bypass is fitted and
adjust to achieve a temperature difference no greater than 20oC
between flow and return with the thermostatic valves closed.
Diagram 2.1
0869
27metres
Max.
PUMP
Heating
Circuit
INDIRECT
CYLINDER
(Shown with
recommended
thermostat and valve).
22mm VENT
15mm COLD FEED
REFER TO BS 5546
28mm
Distributor tube in
pumped return
connection
I
LER
C
L
DRAIN OFF
COCK
600
500
400
300
200
100
0
12
8
4
0
04812
16 20 24 28
FLOW RATE (LITRES/MINUTE)
WATER PRESSURE LOSS (mm HEAD OF WATER)
WATER PRESSURE LOSS (INCHES HEAD OF WATER)
24
16
800 32
28
20
700
01 2 3456
FLOW RATE (GALLON/MINUTE)
Diagram 2.3
0872
PRESSURE LOSS OF BOILER

92000225005B
3 Flue and Ventilation
Important Notes
The flue must be installed in accordance with the rules in force
in the countries of destination.
The flue must be in accordance with the current issue of
BS5440 Part 1.
The Chimney Flue Adapter Kit (Pt. No. 2000461993) socket is
designed to take flue pipes to the current issue of BS567. If a
flue pipe to BS715 is to be used, an adapter must be fitted to the
boiler flue socket.
The flue must be at least equivalent to 1m vertical.
The maximum flue length must not exceed 15m vertical.
Due to the Sedbuk D efficiency of the Hideaway FF if the flue
length exceeds the following ;
40C FF - 5m, 50C FF - 6m, 60C FF - 7m
then provision must be made to ensure that the condensate
products are drained away and that the flue liner is of the
appropriate specification. We would recommend that one of the
following flue liners should be used or an equivalent specification:
Ritevent - Chimflex LW or SB
Selkirk - Selflex TS or TSE
An existing liner must be changed if there is any doubt that it will
not operate safely throughout the life of any new appliance.
A drain point is incorporated on the chimney flue adapter to
which a drain pipe can be connected, refer to section 4.10.
3.1 Flue Guidelines
The flue should be kept as short as possible. Horizontal or very
shallow runs of the flue should be avoided as they encourage
local cooling.
Always choose a flue route which will cause the least cooling of
the flue.
There should be a vertical rise of at least 600mm (2ft) before
using a bend. 90oelbows should not be used.
The existing flue may not be completely sound. Therefore, to
prevent the possibility of leakage, additional sealing MUST be
carried out between the base of the chimney and the flue liner.
The end of the flue liner at the chimney top must be adequately
sealed and clamped, using proprietary fittings suitable for the
flue liner used, see diagram 3.1.
The flue should, preferably, end above ridge height but at the
least above the eaves of a pitched roof. Use a certificated
terminal.
If the flue is passed through or near any combustible material it
should be installed in accordance with the current issue of
BS5440 Part 1.3. If in doubt seek advice from the local gas
undertaking or Hepworth Heating Ltd.
3.2 Existing Chimney
An existing brick chimney must be thoroughly swept and all
debris cleared away before lining.
Remove any damper or register plate. Alternatively it may be
locked in the fully open position.
A flexible flue liner is preferred but a rigid liner may be used, with
connection to the boiler flue socket made with a short vertical
piece of flexible liner, see diagram 3.2.
The sealing plate also prevents debris falling and gives the flue
better insulation, reducing the possibility of condensation, see
diagram 3.1.
Check the system efficiency before installing the boiler.
Diagram 3.2
9915
APPROVED
SEAL
FLEXIBLE
LINER
BOILER
RIGID
FLUE
LINER
Diagram 3.1
9914
SEALING AND
CLAMPING
PLATE
AIR
SPACE
150mm (6in) plug of Mineral Wool or similar
600mm
SEALING
PLATE
3.3 New Chimney
A newly built chimney can be lined with a moisture resistant
lining, such as salt glazed pipe, of an appropriate diameter as
specified in the Building Regulations.
In the case of a salt glazed lined flue, it is recommended that a
short vertical length of flue pipe, preferably flexible metallic be
used. Fix and seal it to the boiler flue socket and make good with
an approved seal.
If a flue and false chimney breast are to be constructed all
openings for pipework to upper floors etc. must be sealed.
If a specially built compartment is constructed for the boiler, it
must conform to the requirements of the current issue of
BS5440 Part 1 and BS5871.

10
2000225005B
3.4 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 Hepworth Heating Ltd.
3.5 Ventilation for Boiler Installed in a Room
or Space
If the boiler is to be installed in a room or space a purpose
designed permanent ventilation opening, to supply air for
combustion, must be provided on an outside wall to external air,
refer to the current issue of BS5440 Part 2 for details.
The opening may be directly into the room or the space
containing the boiler, or an outside wall of an adjacent room or
space which has an internal permanent air vent, of the same
size, into the room or space containing the boiler.
Do not ventilate through a bedroom, bedsitting room, private
garage or a room containing a bath or shower.
When the boiler is installed in a room or internal space already
containing other fuel burning appliances then the air supply of
such appliances must be taken into account.
The ventilation opening areas are given in “Air Vent Table ”. The
figures quoted refer to the minimum acceptable effective area.
3.6 Ventilation for Boilers Installed in a
Compartment
When the boiler is fitted in a compartment, high and low level
purpose designed, permanent openings must be provided to
supply air for combustion and compartment ventilation.
The cupboard containing the boiler must have the door removed
for ventilation reasons.
The air vents must have minimum areas, see “Compartment Air
Vent table". The figures quoted refer to the minimum acceptable
effective area.
Both the high and low level openings must communicate with
the same room, or must both be on the same wall to outside air.
If air vent grilles are fitted to a cavity wall, the opening through
the wall must be ducted.
Where ventilation air to a compartment is taken from a room or
space, then the room or space must be fitted with a ventilation
opening as specified in “Air Vent Table”.
For information regarding compartment requirements refer to
the appropriate section of the current issue of BS6798.
3.7 Extract Fans
If an extract fan is fitted in the premises, there is a possibility that
if adequate inlet openings are not provided, spillage of the
products from the boiler could occur.
When openings are fitted in accordance with the current issue
of BS5440 Part 2 and this section, extract fans should not cause
down draught, but where such fan installations are found, a
spillage test must be carried out in accordance with the current
issue of BS5440 Part 1 and any corrective work done.
3 Flue and Ventilation
AIR VENT TABLE
- FOR ROOM/ SPACE INSTALLATIONS
EFFECTIVE AREA OF VENT
40C FF 30cm24.7 in2
50C FF 46cm27.1 in2
60C FF 59cm29.2 in2
FROM
OUTSIDE
COMPARTMENT AIR VENT TABLE
COMPARTMENT
VENTILATION
REQUIREMENTS
VENTILATION
FROM ROOM
OR SPACE
40C FF 130cm221in2259cm241in2
HIGH LEVEL LOW LEVEL
VENT AREA VENT AREA
50C FF 162cm225in2323cm251in2
60C FF 188cm230in2376cm259in2
40C FF 65cm210in2130cm221in2
50C FF 81cm213in2162cm225in2
60C FF 94cm215in2188cm230in2

11 2000225005B
Diagram 4.1
WATER CONNECTIONS - GRAVITY
DOMESTIC, PUMPED HEATING
ALTERNATIVE
HEATING
RETURN
With distributor
tube (not shown)
ALTERNATIVE
HEATING OR
DOMESTIC
HOT WATER
FLOW
GRAVITY
DOMESTIC
RETURN TO
ANY OF THE
3 REMAINING
LOWER CONNECTIONS
9859
General Installation Notes
The appliance pack contains :-
Boiler.
Casing panels, packed seperately.
Loose items fittings pack, see list in pack.
The chimney flue adapter with flue extension is supplied
seperately.
Before installation of the boiler make sure that the location
selected is in accordance with the requirements of Section 1.8.
4.1 Unpacking
The boiler casing panels are packed separately within the main
carton and are designed to enable gas and water connections
to be made before fitting the casing panels.
The casing brackets, flue restrictor, distributor tube and other
loose items, are in the fittings pack.
IMPORTANT. With regards to the Manual Handling Operations,
1992 Regulations, the following operation exceeds the
recommended weight for one man lift.
4.2 Water Connections - Gravity Domestic and
Pumped Heating
Fit suitable fittings into the boiler tappings, see diagram 4.1.
Make sure that all pipes are taken backwards and will clear the
casings.
Heating flow: Any one of the four upper connections may be
used.
Domestic flow: Any one of the three remaining upper connections
may be used.
Heating return: The water distributor tube must be fitted into
either of the front lower connections on all installations, see
diagram 4.2. This tube is in the fittings pack.
Domestic return: Any one of the three remaining lower
connections may be used for the gravity domestic hot water
return.
Fit plugs into any unused boiler tappings.
4.3 Water Connections - Fully Pumped
Systems
Fit suitable fittings into the boiler tappings as required, see
diagram 4.3. Make sure that all pipes are taken backwards and
will clear the casings.
It is important that all connections are made as shown in
diagram 4.3.
Fit the water distributor tube into the return connection, see
diagram 4.2. This tube is packed in the fittings pack.
Fit plugs into any unused boiler tappings.
4 Installation
DISTRIBUTOR TUBE Diagram 4.2
0871
MARKERS DISTRIBUTOR TUBE
MUST BE IN PUMPED
RETURN CONNECTION
Notch on DISTRIBUTOR
must lie within the shaded
area, BETWEEN TWO
MARKERS
Diagram 4.3
WATER CONNECTIONS FULLY
PUMPED SYSTEMS
9859
ALTERNATIVE
FLOW
POSITIONS
ALTERNATIVE
RETURN
POSITIONS
With distributor
tube (not shown)

12
2000225005B
9863
SIDE CASINGS FITTING Diagram 4.7
MAX.
SIDE
CASING
(R.H.)
MIN.
BOILER
PLINTH
FRONT
CASING
BRACKET
No. 8
SCREW
(4)
LOCATING
SLOTS
CASING BRACKETS FITTING Diagram 4.6
9858
FRONT
CASING
BRACKET
No.8
SCREW
(4)
CAPTIVE
NUT
UPPER CASING
BRACKET
CAPTIVE
NUT
4.4 Pipework
When the front tappings are used, it is essential that any
pipework or fittings do not project more than shown in diagram
4.4.
When using a rear tapping with Rc (1in BSP) fitting for 28mm od
pipework, it is recommended that a short nipple and an Rc
thread (BSP) to copper elbow is used. If the pipework is required
to run back to the wall, make sure that it will clear the boiler air
duct and, if working to minimum clearance, does not project too
far from the boiler, see diagram 4.5.
Do not route any pipework, water or gas, across the front of the
combustion chamber cover.
The gas pipework must be along the left hand side of the boiler.
4.5 Casing Brackets
Fit the two upper and two front casing brackets shown in
diagram 4.6, using the No.8 screws provided.
NOTE: The screws will already be fitted.
Push the captive nuts, supplied loose, on to the casing brackets
as shown in diagram 4.6.
4 Installation
No.8
SCREW
(4)
Diagram 4.4
PIPEWORK CASING
CLEARANCES
Diagram 4.5
REAR CONNECTION
PIPEWORK (28mm)
9861
FOR MINIMUM
CLEARANCE
9860

13 2000225005B
4.6 Side Casings
Fit the side casings by locating their lugs into the appropriate
slot in the boiler plinth, see diagram 4.7, depending on the
required height, there are two options, see section 1.7.
Secure the casing sides to the front and rear upper casing
brackets with self-tapping screws supplied, see diagrams 4.7
and 4.8.
Note: If the side in-fill panel is being fitted it should be fitted at
the same time as the side casing, see next section.
4.7 Side In-fill Panel (If required)
A side in-fill panel is supplied with the boiler, which can be fitted
at the rear of the left or right hand side casing but can be
discarded if the water connections are made on both sides of
the boiler or if the boiler is screened by fixtures. The in-fill panel
will usually be fitted on the side where there are no pipework
connections.
Insert the push fit plastic location peg, supplied, through the in-
fill panel and side casing holes and secure with the spring clips,
see diagram 4.9.
NOTE
The boiler is assembled at the factory with the control box and
heat shield fitted in the lower casing height position.
4 Installation
Diagram 4.10
0886
WING NUT
SELF
TAPPING
SCREWS
(3)
(3) SELF
TAPPING
SCREWS
(for height
adjustment
only)
"LOW"
position
"HIGH"
position
"LOW"
position
"HIGH"
position
Diagram 4.9
PLASTIC
PEG
PLASTIC
PEG
SPRING
CLIP
SIDE
CASING
(R.H.SHOWN)
UPPER VIEW
LOWER VIEW
SPRING
CLIP
SIDE
CASING
(R.H. SHOWN)
IN-FILL
PANEL
IN-FILL
PANEL
Diagram 4.8
SCREW
UPPER
CASING
BRACKET
SIDE CASING
(R.H. SHOWN)

14
2000225005B
Diagram 4.13
FLUE DUCT
EXTENSION
PIECE
FAN
4 Installation
4.8 Flue / Boiler Connection
Remove the three self-tapping screws from the lower part of the
control box support bracket, see diagram 4.10.
Undo the wing nut that secures the top of the heat shield and
carefully hinge down control box and heat shield, see diagram
4.10.
Release the two toggle latches that secure the boiler access
door and remove, see diagram 4.11.
Remove the electrical connections from the fan by pulling the
insulation boots only.
Disconnect the two air pressure tubes taking note of their
positions.
Remove the fan assembly from the flue hood by removing the
securing screw, pull forward and lift up to release the 3 hooked
securing lugs underneath the fan, see diagram 4.12.
From the Chimney Flue Adapter Kit take the flue spigot, the
gasket is supplied in the fittings pack.
Connect the flue spigot and gasket to the top flue outlet of the
boiler using the self tapping screws provided, see diagram 4.15.
From the Chimney Flue Adapter Kit, take the chimney flue
adapter and remove restrictor securing screw, select and fit
appropriate restrictor
40C FF : marked 'A'
50/60C FF : marked 'B'
then secure in place with the previously removed screw. To
remove plastic end stop, depress the collet.
Slide the Chimney Flue Adapter into the flue spigot until it
engages in the bayonet connection and flue duct bend extension
piece, then twist clockwise to lock, see diagram 4.15.
Engage the flue duct extension on to the flue duct, secure fan,
replace electrical connection and air pressure tubes.
The polarity of the electrical connections is not important.
Make sure that the air pressure tubes are fitted as before, see
diagram 4.14 and that the fan duct engages fully into the flue
duct extension piece.
IMPORTANT. With regards to the Manual Handling Operations,
1992 Regulations, the following operation exceeds the
recommended weight for one man lift.
Place the boiler in position taking care not to damage the casing
panels.
Flue Connection
NOTE: Fix and seal the flue to the hood of the chimney flue
adapter in accordance with normal practice.
The flue should be 100mm (4in) nominal diameter, refer to
section 3.
Diagram 4.12
SECURING
LUGS
Diagram 4.11
TOGGLE
LATCHES
FAN
ACCESS
DOOR
10267

15 2000225005B
4.9 Water & Gas connections
Replace fan access door, heat shield and control box.
Note: When replacing the fan access door make sure the lip at
the top of door fits into and behind the slotted bracket located at
the top of the boiler.
As there are two casing height options, the control box height
and the heat shield may have to be adjusted to suit your
requirements.
Complete the water connections to the boiler.
Fill, vent and flush the system.
Check for any water leaks and put right.
Make the gas connection to the service cock, at the lower left
hand side of the boiler, see diagram 1.1.
The whole of the gas installation, including the meter, should be
inspected, tested for soundness and purged in accordance with
the current issue of BS6891.
4.10 Condensate Drain Connection
(If Applicable)
With reference to Section 3, should your flue be greater than the
"Dry" flue length stated, then a condensation drain should be
fitted.
The condensate drain connection is on the chimney flue adapter,
see diagram 4.15. A 22mm plastic overflow pipe should be used
to fit on to the drain connection and discharge to a drain. The
drain pipe should have a fall of at least 2.5°away from the boiler
and should incorporate a 'U' trap.
Condensate should, if possible be discharged into the household
internal drainage system. If this is not practicable, discharge
can be allowed into the external household drains or by a
purpose designed soak away.
It is recommended that any external condensate drain is insulated
and also preferably of 32mm diameter, to prevent freezing in
adverse weather conditions.
4.11 Top Casing
Refer to diagram 4.16.
Fit two plastic pegs, one on each side, in the holes on the top
casing. The plastic pegs are a tight fit and are best pushed home
with a flat faced tool.
Secure front of top casing with the two screws provided.
4 Installation
Diagram 4.16
TOP CASING
9865
SCREW (2)
PLASTIC
PEG (2)
CHIMNEY
FLUE
ADAPTER
Diagram 4.15
FLUE
SPIGOT
Diagram 4.14
AIR PRESSURE
TUBE (RED)
AIR PRESSURE
SWITCH
ELECTRICAL
CONNECTORS
AIR PRESSURE
TUBE (CLEAR)
RESTRICTOR
SECURING SCREW RESTRICTOR
END STOP

16
2000225005B
bk
5 Electrical Wiring
MAINS INLET
CONNECTOR Diagram 5.3
CABLE
CLAMP
SCREW
5.1 Control Box Access
Remove control box cover by undoing the four securing screws
(two on control box, two on the heat shield) and lift off, see
diagram 5.1.
5.2 Electrical Connections
WARNING. This boiler must be earthed.
Take care not to damage any internal wiring.
Using heat resistant (85oC) cable of at least 0.75mm2(24/
0.2mm) and of a suitable length, route as shown in diagram 5.2.
Thread through the grommet at the bottom rear of the control
box, through the cable clamp and connect to appropriate
terminals. Tighten cable clamp screws, see diagram 5.3.
Standard colours are, brown - live (L), blue - neutral (N) and
green/yellow - earth .
The mains cable outer insulation must not be cut back external
to the cable clamp.
Make sure the cable is suitably secured.
When making connections make sure that the earth conductor
is made of a greater length than the current carrying conductors,
so that if the cable is strained the earth conductor would be the
last to become disconnected.
5.3 Pump Connection
The pump must be connected to the external controls.
5.4 Testing - Electrical
Checks to ensure electrical safety must be carried out by a
competent person.
After installation of the system, preliminary electrical system
checks as below should be carried out.
1. Test insulation resistance to earth.
2. Test earth continuity and short circuit of all cables.
3. Test the polarity of the mains.
The installer is requested to advise and give guidance to the
user of the controls scheme used with the boiler.
Replace the control box cover.
Diagram 5.2
CABLE
CLAMP
CONTROL
BOX
COVER
CONTROL
BOX
SECURING
SCREWS
BOILER
TEMPERATURE
CONTROL
Diagram 5.1
9905
CABLE
CLIPS
CABLE
CLIPS
HEAT RESISTANT CABLE
TERMINAL BLOCK CONNECTIONS
TERMINAL
BLOCK

17 2000225005B
6 Commissioning
IMPORTANT NOTE
The WARNING NOTICE attached to the front casing
must only
be removed by the user.
Please ensure the “Benchmark” logbook is completed and left
with the user, and the magnetic lighting instruction label is
placed on the surface of the boiler casing.
6.1 All Systems
Commissioning should be carried out by a competent person in
accordance with the current issue of BS6798.
UNDER ALL CIRCUMTANCES the case must be correctly
fitted and sealed, unless fault finding.
Make sure that the system has been thoroughly flushed out with
cold water without the pump in place.
Refit the pump, fill the system with water, ensuring that all the
air is properly vented from the system and pump.
6.2 Initial Lighting and Testing
CAUTION. This work must be carried out by a competent
person, in accordance with the current issue of BS6798.
Make sure that all naked lights and cigarettes are extinguished.
Refer to ‘Instructions for Use’ and identify the controls.
Check that the boiler is isolated from the electrical supply.
Turn the gas service cock “On” , see diagram 6.1.
Purge in accordance with the current issue of BS6891.
WARNING. The multifunctional control and fan operate on
mains voltage, terminals will become live.
If programmer control is fitted, make sure it is in the ON mode.
Make sure that any remote controls are calling for heat.
Diagram 6.1
BOILER COMPONENTS
10052
A CONTROL BOX
B PHIAL POCKET
C GAS SERVICE COCK
D "BURNER ON" NEON
E RESET NEON
F TEMPERATURE CONTROL
G BURNER PRESSURE TEST POINT
H GAS PRESSURE ADJUSTMENT SCREW
J DATA LABEL
E
D
A
G
Turn the boiler temperature control clockwise to “Max”.
The ignition system will operate to light the boiler. After a pre-
set time if ignition has not taken place the boiler will shutdown.
To re-start the lighting sequence, turn the boiler temperature
control to “O”, then fully clockwise to “Max”.
"Max" is approximately 82°C (180°F).
After the burner has lit, the “Burner on” neon on the control panel
will come on.
Isolate the boiler from the electrical supply.
Loosen the burner pressure test point screw and connect a
suitable pressure gauge, see diagram 6.1.
Switch on the electrical supply to the boiler.
WARNING. The multifunctional control and fan operate on
mains voltage, terminals will become live.
6.3 Testing - Electrical
Turn the boiler temperature control fully clockwise to the
maximum setting.
The lighting sequence is automatic as follows:
The fan operates and after a short period of time, the spark
ignition operates, the solenoid opens, then the burner will light
shown by the “Burner On” neon on the control panel lighting up.
The burner will remain alight until switched off, either by the
boiler temperature control, programmer (if fitted) or any remote
system control.
To make sure that the flame supervision device is working
correctly the following should be done.
With the burner alight, turn the gas service cock “Off”, see
diagram 6.1.
After a short period the burner will go out.
F
B
C
H
A
J

18
2000225005B
6 Commissioning
The correct working of the flame supervision is shown by the
“Burner On” neon going out and the ignition sequence starting
up.
After a short period the boiler will shut down.
If the lighting sequence described fails, refer to fault finding
section 9.
To carry on turn the gas service cock “On”, see diagram 6.1.
To re-start the lighting sequence, turn the burner temperature
control to “0” then fully clockwise to “Max.”.
During normal operation when the boiler switches “Off”, the
burner will go out. The automatic lighting sequence will work
again when heat is required.
If the reset neon lights, turn the boiler temperature control to "0"
(off), wait 30 seconds, then repeat the lighting instructions.
6.4 Testing - Gas
With the boiler on proceed as follows:
Test for gas soundness around the boiler gas components
using a suitable leak detection fluid, in accordance with the
current issue of BS6891.
Check the burner gas pressure at least 10 minutes after boiler
has lit, refer to Data Label, see diagrams 1.2, 1.3 & 1.4.
If necessary adjust the gas pressure to obtain the required
setting turning screw clockwise, to decrease pressure, see
diagram 6.1.
Should any doubt exist about the gas rate, check it using the
gas meter test dial and stop watch at least 10 minutes after the
burner has lit, making sure that all other gas burning appliances
and pilot lights are off.
The gas rates: Hideaway 40C FF : 1.7m3/h (49ft3/h)
Hideaway 50C FF : 2.1m3/h (60ft3/h)
Hideaway 60C FF : 2.5m3/h (70ft3/h)
are for guidance only, dependent on the heat setting.
Turn the boiler temperature control fully anti-clockwise to “0”.
Isolate from the electrical supply.
Remove the pressure gauge from the test point and refit screw,
making sure a gas tight seal is made.
When the boiler temperature control is turned to the “0” position,
by hand, wait at least 30 seconds before turning On again.
There may be an initial smell given off from the boiler when new,
this is quite normal and it will disappear after a short period of
time.
6.5 Testing - All Water Systems
Allow the system to reach maximum working temperature and
examine for water leaks.
There should be no undue noise in the system.
The boiler should then be turned off and the system drained off
as rapidly as possible,whilst still hot.
Refill system.
6.6 Open Vented System
Ensure there is no pumping over of water or entry of air at the
open vent above the feed and expansion cistern.
6.7 Adjustment - Fully Pumped Open Vented
System
When commissioning the system the boiler should first be fired
on full service, that is, central heating and domestic hot water.
Adjust the pump to the system design setting, then balance the
system, making adjustments as necessary.
6.8 Completion
Adjust the boiler temperature control and any system controls
to their required settings.
Fit the bottom plinth panel and secure with two dog point
screws, see diagram 6.2.
Finally fit the front panel by hooking under front of top panel
locating on the two studs and securing at the bottom on to the
bottom plinth panel with two screws, see diagram 6.3.
Diagram 6.2
LOCATING
STUDS
LOCATE
UNDER LIP
FRONT
PANEL
Diagram 6.3
FRONT PANEL
SECURING SCREWS
BOTTOM PLINTH
PANEL
SECURING SCREWS

19 2000225005B
7 Instructions to the User
Instruct and demonstrate the safe and efficient operation of the boiler, heating system and domestic hot water system.
Advise the user, that to ensure 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 particular installation and usage, but in general once
a year should be enough.
Draw attention, if applicable to the current issue of the Gas Safety (Installation and Use) Regulations, Section 35, which imposes
a duty of care on all persons who let out any property containing a gas appliance.
It is the Law that servicing is carried out by a competent person.
Advise the user of the precautions necessary to prevent damage to the system and building in the event of the heating system being
out of use during frost and freezing conditions.
Reminder - Leave these instructions and the “Benchmark” logbook with the user.
8 Servicing
REMEMBER, When replacing a part on this appliance, use only
spare parts that you can be assured conform to the safety and
performance specification that we require. Do not use
reconditioned or copy parts that have not been clearly authorised
by Hepworth Heating Ltd.
Products of Combustion Check
Note: To obtain a products of combustion reading, remove the
front panel and remove the control box as descibed in the
relevant paragraphs of section 4.8. Next, remove the cap from
the sampling point, located on the top of the left hand side of the
inner casing, see diagram 8.1.
Connect the analyser tube on to the nipple.
WARNING. The multifunctional control and fan operate on
mains voltage, terminals will become live.
Switch on the electrical supply and gas supply then operate the
boiler.
On completion of the test switch off the electrical supply and gas
supply, remove analyser tube and replace sampling point cap.
Servicing
Before servicing turn off the gas and isolate the electrical supply
to the boiler.
After completing a service always test for gas soundness, make
electrical checks and carry out functional check on controls.
Unless stated otherwise all parts are replaced in the reverse
order to removal.
Diagram 8.3
ELECTRICAL
WIRE
RETAINING
CLIPS
CONTROL BOX
SUPPORT
BRACKET
Diagram 8.2
GAS
SERVICE
COCK
UNION
ELECTRICAL
PLUG
Diagram 8.1
SAMPLE POINT
SECURING
SCREW

20
2000225005B
Diagram 8.5
8 Servicing
8.1 Access
Remove the boiler front casing panel, refer to section 6.8.
Remove the bottom plinth panel by unscrewing the two dog
point screws securing the panel to the boiler plinth, see diagram
8.4.
Disconnect gas valve from gas cock and unplug electrical plug
from gas valve, firstly removing electrical plug securing screw,
see diagram 8.2.
Unclip electrical wires from control box support bracket, see
diagram 8.3.
Undo the four self-tapping screws that secure the combustion
chamber front and carefully withdraw it together with the burner
and gas valve assembly, taking care not to strain the ignition
and earth wire, see diagram 8.5.
Note: When replacing burner in combustion chamber make
sure it fits correctly on the guides.
Disconnect the ignition and earth leads from the burner and
remove by drawing the leads though the grommet, see diagram
8.5.
Remove the three self-tapping screws from the lower part of the
control box support bracket, see diagram 8.6.
Undo the wing nut that secures the top of the heat shield and
carefully hinge down control box and heat shield, see diagram
8.6.
Release the two toggle latches that secure the fan access door
and remove, see diagram 8.7.
Note: When replacing the fan access door make sure the lip at
the top of door fits into and behind the slotted bracket located at
the top of the boiler.
Remove the electrical connections from the fan by pulling the
insulation boots only.
Disconnect the two silicone tubes from the fan taking note of
their positions.
Note: To ease removal of the right hand baffle from the heat
exchanger, remove both silicone tubes from the air pressure
switch.
Remove fan securing screw, electrical connections and air
pressure tubes, then remove fan and flue hood by sliding back
to disengage the retaining lugs then lift up.
Remove the flue hood.
When replacing the flue hood ensure that it rests on the guides
and that the rear of flue hood is located under the pegs at the
rear and pushed down and back fully.
IMPORTANT: When re-fitting fan check that it fits fully into the
flue duct extension piece.
COMBUSTION
CHAMBER COVER
IGNITION AND
EARTH LEADS
GROMMET
Diagram 8.4
BOTTOM PLINTH
PANEL
SECURING SCREWS