221954D.09.04
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.
We recommend you complete and return your Guarantee Registration Card as soon as possible.
If this card is missing you can obtain a copy or record your registration by telephoning Glow-worm's own service
organisation on 01773 828100.
Our Guarantee gives you peace of mind plus valuable protection against breakdown by covering the cost of:
Guarantee Registration
Fanned Flue Boiler
This is a Cat I2H Appliance
To be left with the user
4272
❏
✔
❏
✔
❏
✔
Instructions for Use
Installation and Servicing
G.C. No. 41-047-52 G.C. No. 41-047-23
REGISTER YOUR GLOW-WORM APPLIANCE
FOR 1ST YEAR GUARANTEE PROTECTION
CALL 0800 073 2142
Micron
100FF
120FF
BS 6332
BS 5258
Reference in these instructions to British Standards and Statutory
Regulations/Requirements apply only to the United Kingdom.
For Ireland the current edition of I.S.813
"Domestic Gas Installations" must be used.
Tel: (01773) 828100
Fax: (01773) 828070
Glow-worm,
Nottingham Road, Belper, Derbyshire. DE56 1JT
General/Sales enquiries:
Tel: (01773) 824141 Fax: (01773) 820569
www.glow-worm.co.uk
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.
2
221954D
Important Information
Introduction 3
Lighting the Boiler 4
General Data 1 5
Flue Terminal 2 9
Water Systems 3 10
Flue and Appliance Preparation 4 12
Boiler Installation 5 14
Flue Fixing 6 16
Electrical Connectors 7 17
Commissioning 8 18
Instructions to the User 9 22
Servicing 10 22
Fault Finding 11 24
Replacement of Parts 12 28
Spare Parts 13 32
CONTENTS DESCRIPTION SECTION PAGE No.
INSTRUCTIONS
FOR USE
INSTALLATION
INSTRUCTIONS
SERVICING
INSTRUCTIONS
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 Glow-worm.
Any alteration not approved by Glow-worm, could invalidate the certification, boiler warranty and may also infringe the current issue
of the Statutory Requirements, see Section 1.4.
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.
Insulation Pads, Glass yarn.
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
Glow-worm.
3 221954D
Introduction
WARNING: It is important that the case (not the controls tray)
is not disturbed or removed other than for servicing by a
competent person.
Please read these instructions and follow them carefully for the
safe and economical use of your boiler.
The Micron FF series are fanned flue boilers designed to
provide central heating and indirect domestic hot water.
The boiler is fully automatic in operation having only one user
control, the control thermostat.
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.
Electrical Supply Failure
Failure of the electrical supply will cause the burner to go out.
Should this occur, operation of the appliance will normally
resume after the electrical supply is restored.
If the boiler does not relight after an electrical supply failure the
overheat safety cutoff device may need resetting, remove the
controls cover and press the reset button, refer to diagram 8.1.
Overheat Safety Cutoff
If the overheat safety cutoff device operates on any other
occasion than an electrical supply failure, press the reset button
as in “Electrical Supply Failure”. If the overheat operates again,
turn the appliance off and contact your installation/servicing
company.
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.
If this appliance is installed in a rented property in the UK there
is a duty or care imposed on the owner of the property by the
current issue of The Gas Safety (Installation and Use)
Regulations, Section 35.
It is the law that any servicing is carried out by a competent
person.
To obtain service, please call your installer or Glow-worm’s own
Service Organisation using the telephone number given on the
controls tray.
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 Clearances
If fixtures are positioned close to the boiler space must be left
as shown in diagram 1.2. At least a minimum clearance of
500mm must be left in front of the boiler to allow for servicing.
Boilers Installed in a Compartment or
Cupboard
If the boiler is installed in a compartment or cupboard do not
obstruct any ventilation openings.
Do not use the compartment or cupboard for storage.
Cleaning
WARNING: This appliance contains metal parts (components)
and care should be taken when handling and cleaning, with
particular regard to edges.
Clean the casing occasionally by wiping it over with a damp
cloth or dry polishing duster.
Do not use an abrasive cleaner.
Boiler Electrical Supply
WARNING: This boiler must be earthed.
The boiler must only be connected to a 230V~50Hz supply
protected by a 3A fuse.
All wiring must be in accordance with the current issue of
BS7671.
Wiring to the boiler must be PVC insulated type to the current
issue of BS6500 Table 16, not less than 0.75mm
2
(24/0.20mm).
The colours of three core flexible cable are:
Brown - live, Blue - neutral,
Green/yellow - earth.
As the markings on your plug may not correspond with these
colours continue as follows:
The cable coloured blue must be connected to the terminal
marked “N” or black.
The cable coloured brown must be connected to the terminal
marked “L” or red.
The cable coloured green/yellow must be connected to the
terminal marked “E”, or green or the earth symbol
.
Instructions for Use
4
221954D
Instructions for Use
To Light the Boiler
WARNING: Sealed Systems
A sealed water system must be filled and pressurised by a
competent person.
Only light the boiler when you are sure that the system has been
filled and pressurised.
The pressure gauge should show at least 0.7bar, anything less
than this figure could indicate a leak and you MUST contact your
installation/servicing company.
If there is any doubt about the boiler being full of water consult
your installation/servicing company.
ALL SYSTEMS.
Do not operate the boiler without water.
Turn the electrical supply on to the boiler and check that all
remote controls are calling for heat.
To Turn the Boiler On
Remove the controls cover, by withdrawing it forward and off,
see diagram 8.6.
Turn the control thermostat knob clockwise to any position
between MIN and MAX. The maximum temperature setting is
about 82
o
C (180oF), see diagram 8.1.
The boiler lighting operation is now automatic as follows.
The fan operates, followed by an ignition spark until the pilot is
lit. When the pilot is alight the ignition system switches off and
the main burner lights. The flames can be seen through the
viewing window, see diagram 8.2.
The main burner will remain alight until switched off by the
control thermostat or any remote control.
If the boiler is switched OFF, by hand, wait at least 30 seconds
before switching on again.
When the boiler switches off, both the pilot and main burner go
out.
The automatic lighting sequence will operate again when heat
is required.
Refit the controls cover.
It should be noted that this is a fan flue appliance and fan
operation may be heard.
To Turn the Boiler Off
For short periods, turn the control thermostat knob anti-clockwise
to “O” Off. To relight, turn the control thermostat knob to any
position between “MIN” and “MAX”.
For longer periods, turn the control thermostat knob fully anticlockwise to “O” Off and switch off the electrical supply to the
boiler.
To relight follow the lighting sequence given above.
Protection Against Freezing.
If the boiler is to be out of use for any long period of time during
severe weather conditions we recommend that the whole of the
system, including the boiler, be drained off to avoid the risk of
freezing up. Make sure that, if fitted, the immersion heater in the
cylinder is switched off.
For the position of the serial number, see diagram 1.2.
5 221954D
IMPORTANT NOTICE
This boiler is for use on Natural Gas (G20) as distributed in the
United Kingdom and Ireland and cannot be used on any other
gas. This boiler must be installed by a competent person
ONLY.
This boiler can be used on an open vented or sealed water
system.
When used on an open vented system domestic hot water can
only be provided by pumped circulation to the indirect cylinder.
Wherever possible, all materials, appliances and components
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.
Sealed Components
Under no circumstances must the User interfere with or adjust
sealed parts.
Sheet Metal Parts
WARNING: When installing or servicing this boiler care should
be taken when handling sheet metal parts, to avoid any possibility
of personal injury.
1.1 Statutory Requirements
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.
The Gas Safety (Installation and 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: Central heating system specification (CheSS)
and
2) GPG 302, 2001: Controls for domestic central heating
system and hot water. BRECSU.
1.2 Data
See Table 1
All dimensions are given in millimetres (except as noted).
The Seasonal Efficiency Domestic Boilers UK (SEDBUK) is
(100) 79, (120) 78.1.
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.
1.3 Range Rating
This boiler is range rated and may be adjusted to suit individual
system requirements.
Diagram 1.2 gives the ratings and settings.
1.4 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
unless approved, in writing, by Glow-worm.
Any alteration not approved by Glow-worm, could invalidate the
certification, boiler warranty and could also infringe the statutory
requirements.
1.5 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) 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.
1.6 Electrical Supply
WARNING: This boiler must be earthed.
All system components shall be of an approved type and shall
comply with and be connected in accordance with the current
issue of BS7671 and any applicable local 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".
Connection of the boiler and system controls to the mains
supply must be through a common isolator and must be fused
3A, maximum. This method of connection must be by a fused
double pole isolating switch with a minimum contact separation
of 3mm on both poles. The switch should be readily accessible
and preferably adjacent to the appliance. It should supply the
appliance only and be easilyidentifiable as so doing.
Alternatively, an unswitched shuttered socket outlet and 3A
fused 3 pin plug both to the current issue of BS1363 may be
used, provided that they are not used in a room containing a
bath or shower.
Wiring to the boiler must be PVC insulated type to the current
issue of BS6500 Table 16.
1 General
6
221954D
K
WATER CONNECTIONS
28mm COPPER PIPE
FRONT ELEVATION
SIDE ELEVATION
GAS CONNECTIONS
RC1/2 (1/4 in. BSPT)
PUMPED
RETURN
PUMPED
FLOW
M
L
GH
F
B
A
N
C
E
P
J
D
Diagram 1.1
1.7 Contents of Packaging
The boiler is delivered in one pack.
Refer to Section 4.2 to check that the flue terminal assembly
supplied is suitable.
1.8 Water System
This boiler may be fitted to an open vented or sealed water
system.
It is recommended that plastic pipes for primary pipework
should not be used for this boiler.
1.9 Drain
System
A draining tap must be provided at the lowest points of the
system which will allow the entire system, boiler and hot water
cylinder to be drained.
Draining taps should be to the current issue of BS2879.
Boiler
A draining point is fitted at the bottom right hand side of the heat
exchanger.
Cover controls to avoid water damage.
If required remove the combustion chamber front cover to
improve access.
1.10 Safety Valve
A safety valve need not be fitted to an open vented system.
1 General
All dimensions are given in millimetres
MODEL A B C D E F G H J K L M N P
100FF,120FF 67 300 63 127 114 450 168 132.5 835 772 63 132 43 78.5
1.11 Location
This boiler is not suitable for outdoor installation.
The boiler may be installed in any room, although particular
attention is drawn to the requirements of BS7671 with respect
to the installation of a boiler in a room containing a bath or
shower. Any electrical switch should be so positioned that it
cannot be touched by a person using the bath or shower. The
electrical provisions of the Building Standards (Scotland)
Regulations apply to such installations in Scotland.
This boiler is suitable for installation in bathroom zones 2 and 3.
In GB this is the current I.E.E. WIRING REGULATIONS and
BUILDING 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.
The boiler may be fitted to a wall made of combustible material.
1.12 Boiler Clearances
Refer to diagram 1.3.
The boiler must be positioned so that at least the minimum
operational and servicing clearances are provided.
Additional clearances may be required for installation.
If fixtures are positioned next to the boiler they should be made
removable for access to pipework.
Sufficient clearance must be left in front of the boiler for
servicing.
7 221954D
MINIMUM CLEARANCES FROM WALLS
CEILING, FLOOR, CUPBOARD, WORKTOPS,
AND INFLAMMABLE MATERIALS
Diagram 1.2
1.13 Room Ventilation
The boiler is room sealed and does not require the room or
space containing it to have permanent airvents.
1.14 Boilers in a Compartment
Where the installation of the boiler will be in an unusual position,
special requirements are needed, the current issue of BS6798
gives detailed guidance on these requirements.
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 requirements for cupboard or
compartment design are given in the current issue of BS6798.
The doorway opening should be of sufficient size to allow for
easy removal of the boiler.
1 General
FRONT
VIEW
6mm
6mm
6mm
160mm
500mm
From a permanent surface
ADDITIONAL CLEARANCES MAY BE
REQUIRED FOR INSTALLATION
6mm
6mm
65mm
Diagram 1.3
DATA LABEL
Where the boiler is fitted in a cupboard or compartment,
permanent high and low level ventilation must be provided. The
minimum ventilation areas are given in Table 2.
1.15 Timber Frame Building
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 Glow-worm.
1.16 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 Building Regulations
1991 - Conservation of fuel and power, 1995 edition - Appendix
G, table 4b.
8
221954D
TABLE 2. COMPARTMENT AIR VENTS
VENTILATION
REQUIREMENTS
VENTILATION
FROM
ROOM
OR SPACE
MODEL
VENTILATION
FROM
OUTSIDE
100FF
HIGH LEVEL
VENT AREA
LOW LEVEL
VENT AREA
100FF
330 51 330 51
396 61.5 396 61.5
cm
2
in2cm2in
2
120FF
120FF
165 25.5 165 25.5
198 30.5 198 30.5
0209M
1 General
*NOTE: Lift weight is with Flue Elbow, Controls Cover and Front
Cover removed.
DATA TABLE 1.
MODEL
TOTAL DRY
WEIGHT
(Including
Terminal)
LIFT WEIGHT
WATER
CONTENT
GAS
CONNECTION
ELECTRICITY
RATING
WATER
CONNECTION
ELECTRICITY
SUPPLY
DATA LABEL
100FF
Rc
1
/2 in.
71W 97W
Internal fuse F1 & F2 (F1A)
2x28mm copper pipes from
top of case
230V~50Hz, fused 3A
Bottom right hand side of case
71.0 kg
(157 lb)
120FF
71.0 kg
(157 lb)
63.3 kg
(140 lb)
63.3 kg
(140 lb)
3.8 litres
(0.84 gal)
3.8 litres
(0.84 gal)
9072
*
9 221954D
A
A
E
G
G
B,C
B,C
F
K
C
UNDER CAR PORT etc.
H,I
J
D
F
K
F
L
M
Q
N
P
NOTE: Detailed recommendations for flues are given in the
current issue of BS5440 Part 1.
2.1 Terminal Position
The minimum acceptable siting dimensions for the terminal
from obstructions, other terminals and ventilation openings are
shown in diagram 2.1. For Ireland the minimum distances for
flue terminal positioning must be those detailed in I.S.813
"Domestic Gas Installations".
The terminal must be exposed to the external air, the position
allowing free passage of air across it at all times.
Car ports 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 it is made of plastic sheeting.
If the car port consists of a roof and two or more walls, seek
advice from the local gas company before installing the boiler.
If the terminal is fitted within 600mm below plastic guttering or
painted soffit an aluminium shield 1500mm long should be fitted
immediately beneath the guttering or eaves. If the terminal is
fitted within 450mm below painted eaves or a painted gutter, an
aluminium shield 750mm long should be fitted immediately
beneath the guttering or eaves.
2.2 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
a minimum of 50mm clearance from any part of the terminal and
be central over the terminal, see diagram 2.2.
A suitable guard, reference Type K3, can be obtained from:
Tower Flue Components Ltd
Morley Road
Tonbridge
Kent
TN9 1RA
The installation of the boiler must comply with the requirements
of the current issue of BS6798, in Ireland, refer also to the
current edition of I.S.813 "Domestic Gas Installations".
In GB it is necessary to comply with the Water Supply (Water
Fittings) Regulations 1999 (for Scotland, the Water Byelaws
2000, Scotland).
To comply with the Water regulations your attention is drawn to:
The Water Regulations guide published by the Water Regulations
Advisory Service (WRAS) gives full details of the requirements.
In IE the requirements given in the current edition of I.S.813
"Domestic Gas Installations" and the current Building Regulations
must be followed.
2 Flue Terminal
7056
Diagram 2.2
MINIMUM SITING DIMENSIONS FOR
FANNED FLUE TERMINALS POSITION MM
HORIZONTAL FLUES
A DIRECTLY BELOW, ABOVE OR
HORIZONTALLY TO AN OPENING, AIR BRICK,
OPENING WINDOW, AIR VENT, OR ANY
OTHER VENTILATION OPENING 300
B BELOW GUTTER, DRAIN/SOIL PIPE 25
C BELOW EAVES 25
D BELOW A BALCONY OR CAR PORT 25
E FROM VERTICAL DRAIN PIPES AND
SOIL PIPES 25
F FROM INTERNAL/EXTERNAL CORNERS
OR TO A BOUNDARY ALONGSIDE THE
TERMINAL 25
G ABOVE ADJACENT GROUND OR
BALCONY LEVEL 300
H FROM SURFACE OR A BOUNDARY
FACING THE TERMINAL 600
I FACING TERMINALS 1200
J FROM OPENING (DOOR/WINDOW)
IN CAR PORT INTO DWELLING 1200
K VERTICAL FROM A TERMINAL 1500
L HORIZONTALLY FROM A TERMINAL 300
VERTICAL FLUES
M FROM ADJACENT WALL TO FLUE 300
N FROM ANOTHER TERMINAL 600
P FROM ADJACENT OPENING WINDOW 1000
Q ABOVE ROOF LEVEL 300
Diagram 2.1
11508
10
221954D
7350
FEED AND
EXPANSION
CISTERN
22mm VENT
(MIN.)
15mm (MINIMUM)
COLD FEED
OPEN VENTED FULLY PUMPED WATER SYSTEM
RECOMMENDED RELATIONSHIP BETWEEN
PUMP COLD FEED AND VENT
450mm
MIN.
HEIGHT
1METRE
MIN.
RETURN
FLOW
CYLINDER
PUMP
HEATING
150mm
MAX.
There must always
be a cold water
path to the return
connection of the boiler.
BOILER
28mm (MINIMUM)
BY-PASS WITH
LOCKSHIELD VALVE
FLOW
RET.
Diagram 3.1
3.1 Frost Protection
If the position of the boiler is such that it may be vulnerable to
freezing it should be protected as specified in the current issue
of BS5422. It is recommended that a frost protection thermostat
be fitted.
3.2 Pump
The pump, with integral valves, should be fitted in the heating
flow pipework from the boiler, it should be set to produce a
temperature difference of 11
o
C (20o), between the flow and
return, with the control thermostat set at “MAX”, which is about
82oC (180oF).
The pressure loss of the boiler is 37.5 litre/min for the 100FF and
45litre/min for the 120FF to give 11
o
C temperature difference.
High resistance microbore systems may require a higher duty
pump.
3.3 Bypass - Fully Pumped and Sealed Water
System
A bypass MUST be fitted to a fully pumped and sealed water
system.
Where the water system allows the boiler and pump to operate
on bypass only, the bypass connection must be at least 2.5metres
away from the boiler.
The flow through the boiler must not be allowed to fall such that
there is a temperature difference greater than 20
o
C between the
flow and return.
3.4 Water System
For an open vented system the boiler must be supplied from an
unrestricted water supply taken from a feed and expansion
cistern fitted at a maximum height of 27metres above the boiler.
The cold feed must be 15mm minimum size.
It is important that the relative positions of the pump, cold feed
and open vent are as shown in diagram 3.1.
The unrestricted open vent from the boiler must rise continuously
to over the feed and expansion cistern.
3.5 Domestic Hot Water System
General - All domestic hot water circuits, connections, fittings
must be in accordance with the relevant standards and water
supply regulations.
For GB: Guidance G17 to G24 and recommendation R17 to
R24 of the Water Regulations Guide.
For IE: The current edition of I.S.813 "Domestic Gas Installations".
3.6 Indirect Cylinder
For all systems supplying domestic hot water the cylinder must
be indirect. It is recommended that the indirect cylinder be fitted
with some form of temperature control.
3.7 Fully Pumped Heating and Domestic Hot
Water
The connections for this type of system MUST be as shown in
diagram 3.1 and 3.2.
It is recommended that plastic pipes for primary pipework
should not be used for this boiler.
3 Water Systems
Loading...