Potterton Performa 24 User manual

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User’s Guide Performa 24
This is a Wall Mounted Combination Boiler Gas Fired Central Heating Unit.
The boiler meets the requirements of Statutory Instrument “ The Boiler (Efficiency) Regulations 1993 No3083” and is
deemed to meet the requirements of Directive 92/42/EEC on the energy efficiency requirements for new hot water
boilers fired with liquid or gaseous fuels:-
Type test for purpose of Regulation 5 certified by:
Notified Body 0086.
Product/Production certified by:
Notified Body 0086.
For use in GB/IE only.
© Baxi Heating UK Ltd 2007

2© Baxi Heating UK Ltd 2007
Natural Gas
Potterton Performa 24
G.C.No47 393 06
Where fitted, user label for
optional timer to be applied here.
IMPORTANT - Installation, Commissioning, Service & Repair
This appliance must be installed in accordance with the
manufacturer’s instructions and the regulations in force. Read
the instructions fully before installing or using the appliance.
In GB, this must be carried out by a competent person as
stated in the Gas Safety (Installation & Use) Regulations.
Definition of competence: A person who works for a CORGI
registered company and holding current certificates in the
relevant ACS modules, or valid ACoP equivalents, is deemed
competent.
In IE, this must be carried out by a competent person as
stated in I.S. 813 “Domestic Gas Installations”.
Lifting - This product should be lifted and handled by two
people. Stooping should be avoided and protective equipment
worn where necessary. Carrying & lifting equipment should be
used as required, e.g. when installing in a loft space.
The addition of anything that may interfere with the normal
operation of the appliance without express written permission
from the manufacturer or his agent could invalidate the
appliance warranty. In GB this could also infringe the Gas
Safety (Installation and Use) Regulations.
Warning - Check the information on the data plate is
compatible with local supply conditions.
CORGI
All CORGI registered installers carry a CORGI identification
card and have a registration number. Both should be recorded
in your boiler Log Book. You can check your installer is
registered by telephoning [phone] or writing to:-
1 Elmwood,
Chineham Business Park,
Crockford Lane,
Basingstoke. RG24 8WG
© Baxi Heating UK Ltd 2007 All rights reserved. No part of this publication may
be reproduced or transmitted in any form or by any means, or stored in any
retrieval system of any nature (including in any database), in each case whether
electronic, mechanical, recording or otherwise, without the prior written
permission of the copyright owner, except for permitted fair dealing under
Copyrights, Designs and Patents Act 1988.
Applications for the copyright owner’s permission to reproduce or make other
use of any part of this publication should be made, giving details of the proposed
use, to the following address:
The Company Secretary, Baxi Heating UK Ltd, Pentagon House,
Sir Frank Whittle Road, Derby, DE21 4XA.
Full acknowledgement of author and source must be given.
WARNING: Any person who does any unauthorised act in relation to a
copyright work may be liable to criminal prosecution and civil claims for damages.
The code of practice for the installation,
commissioning & servicing of central
heating systems.
“Potterton” supports

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© Baxi Heating UK Ltd 2007
In an Emergency
If a water or gas leak occurs or is suspected, the boiler
can be isolated at the inlet valves as follows;
1. Turn off the electrical supply and turn the selector
switch on the facia box to the Off position.
2. Using a suitable open ended spanner or
screwdriver turn the square on the gas tap to the left
to isolate the gas supply at the boiler (Fig. 1).
3. The isolating valves are positioned under the boiler
and can be closed by turning their taps to the right
towards the wall (Fig. 2).
4. Call your Installer or Service Engineer as soon as
possible.
In case of gas leaks
1. If a gas leak is found or suspected, turn off the gas
supply at the meter immediately and at the isolating valve
on the boiler if possible. Contact your Gas Supplier
immediately.
Servicing your Appliance
1. For reasons of safety and economy your appliance
should be serviced annually. Servicing must be performed
by a competent person. Your Installer or Service Engineer
will be able to advise you.
Electricity Supply
1. THIS APPLIANCE MUST BE EARTHED.
2. A standard 230V ~ 50Hzsupply is required. The
appliance must be protected by a 3 amp fuse.
Never Hang Flammable Items Over The Appliance
Gas Tap
Heating Flow, Heating
Return and Mains
Water Inlet
Isolating Valves
Fig. 1
Fig. 2

4© Baxi Heating UK Ltd 2007
Introduction
1. Your Potterton Performa 24 is a gas fired, room
sealed, powered flue combination boiler, providing
central heating for your home and mains fed domestic
hot water to taps and shower. It is fully automatic and
does not have a pilot light.
2. Priority is given to the hot water mode - when a hot
water tap is turned on the supply of heat to the central
heating circuit is interrupted.
Operating the Boiler
1. Ensure that the electricity and gas supplies are
turned on. Check that the central heating pressure is
between 0.5 and 1.0 bar (Fig. 3).
2. Turn the On/Off/Reset selector switch either anti-
clockwise from the off position (Fig. 5) to both central
heating and domestic hot water or clockwise to
domestic hot water only.
3. In either position the green “power” neon ( ) will
illuminate (Fig. 4).
4. Position (i) In this position the central heating will
operate according to demand or provide domestic hot
water when a tap or shower is turned on (Fig. 6).
Priority is given to domestic hot water.
5. Position (ii) In this position hot water will be
provided when a tap or shower is turned on (Fig. 7).
6. The boiler will light automatically on demand.
7. The orange “burner” neon ( ) will illuminate when
the boiler is operating and the main burner is on
(Fig. 4).
IMPORTANT: When the selector switch is in the
‘0’ (Off) position the electrical supply to the boiler is
isolated. The boiler will not operate and the
integral timer (if fitted) will require resetting once
the selector switch is set to either Position (i) or
Position (ii).
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Reset
Reset
Position (ii)
(Hot Water)
Fig. 6
Fig. 7
Reset
OFF Position
Fig. 5
Fig. 4
Fig. 3
1. On/Off/Reset Selector Switch
2. Burner On & Fault Indicator Neon
3. Power Neon
4. Flame Failure & Fault Indicator Neon
5. Central Heating Temperature Control
6. Hot Water Temperature Control
7. Central Heating System Pressure Gauge
8. Optional Integral Timer Position
12 34 5 6 7 8
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Position (i)
(Central Heating or Hot Water)

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© Baxi Heating UK Ltd 2007
Fault Indication
1. Your Potterton Performa 24 has three neon
indicators. The upper two function as boiler on and
fault indicators.
2. Depending on the nature of the fault the upper two
neons will illuminate, go off or flash.
3. There are five possible combinations, each
indicating one or more fault conditions. These are
described below.
A
The flue or flue terminal is blocked or obstructed in
some way, or there is an internal fault.
If there is no external blockage of the flue that can be
easily removed contact your Installer or Service
Engineer.
B
The circulating pump is faulty or the system pressure
has dropped. Check the system pressure (see page 7).
If the pressure is in the normal range a pump fault is
indicated. Contact your Installer or Service Engineer.
C
A fault on the boiler temperature sensor is indicated.
Contact your Installer or Service Engineer.
D
The primary system or the boiler has overheated.
Allow the boiler to cool. Turn the selector switch fully
anticlockwise against the spring pressure to the ‘Reset’
position and hold for at least 3 seconds.
If this occurs repeatedly contact your Installer or
Service Engineer.
E
The burner has failed to light, or incomplete lighting of
the burner has occurred. Turn the selector switch fully
anticlockwise against the spring pressure to the ‘Reset’
position and hold for at least 3 seconds.
If this occurs repeatedly contact your Installer or
Service Engineer.
Burner On
Flame Failure
Power On
Off
Fast Flashing (2 every second)
On
A
Burner On
Flame Failure
Power On
Off
Slow Flashing (1 every 2 seconds)
On
B
Burner On
Flame Failure
Power On
Slow Flashing (1 every 2 seconds)
Slow Flashing (1 every 2 seconds)
On
C
Burner On
Flame Failure
Power On
Slow Flashing (1 every 2 seconds)
On
On
D
Burner On
Flame Failure
Power On
Off
On
On
E
Reset
Reset Position

6© Baxi Heating UK Ltd 2007
Temperature Control
1. Central Heating: The central heating hot water flow
temperature can be adjusted between 30° C (± 5° C)
minimum and 85° C (± 5° C) maximum.
2. Turn the control knob clockwise to increase the
temperature (Fig. 8).
3. In normal winter usage we recommend that the
central heating temperature be set at maximum.
4. Domestic Hot Water: The temperature of the
domestic hot water can be adjusted by turning the
control knob clockwise to increase up to a maximum of
65° C (Fig. 9).
5. The temperature of the water is also dependent on
the water flow rate and the temperature of the mains
water coming into the house.
6. By slightly reducing the flow from the tap the
temperature will increase up to the maximum if
required.
7. The flow rate can be reduced down to as low as 2.5
litre/min. The boiler will still recognise the need to heat
the water.
Domestic Hot Water
Temperature Control
Fig. 8
Central Heating
Temperature Control
Fig. 9

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© Baxi Heating UK Ltd 2007
Central Heating System Pressure
1. The water pressure in the central heating system is
indicated by the pressure gauge.
2. With the system cold and the boiler not operating
the pressure should be between 0.5 and 1.0 bar.
During operation the pressure should not exceed 2.5
bar, and will normally be between 1.0 and 2.0
(Figs. 10 & 11).
3. A pressure of 3 or greater indicates a fault. The
safety pressure relief valve will operate, at a pressure
of 3 (Fig. 12). It is important that your Installer or
Service Engineer is contacted as soon as
possible.
4. The minimum pressure for correct operation is 0.5.
If the pressure falls below 0.5, this may indicate a
leak on the central heating system (Fig. 13).
To Shut Off the Boiler
1. For short periods: Turn the selector switch to the
Off position (Fig. 14).
2. For long periods: Turn off the selector switch
(Fig. 14), electricity and gas supplies.
If your home is to be left unoccupied for long
periods during cold weather the boiler and whole
system should be drained unless equipped with
frost protection.
3. Your installer will advise you about frost protection
and draining the system.
IMPORTANT: When the selector switch is in
the ‘0’ (Off) position the electrical supply to the
boiler is isolated. The boiler will not operate and
the integral timer (if fitted) will require resetting
once the selector switch is set to either
Position (i) or Position (ii).
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ON/OFF/RESET
Selector Switch
Reset
OFF Position
Fig. 14
Normal Pressure (when cold)
Normal Pressure (operating)
Fig. 10
Fault
Fig. 11
Below Minimum
Fig. 12
Fig. 13
Pressure Gauge

8© Baxi Heating UK Ltd 2007
Clearances around the Boiler (Figs. 15 & 16)
1. The minimum clear spaces needed around the
boiler measured from the casing are as follows:
Top - 200mm
Bottom - 200mm
Both sides - 5mm
Front - 5mm (In Operation)
- 450mm (For Servicing)
2. These areas must not be obstructed in any way.
Blocking the clearance spaces may result in the
boiler overheating and damage may occur.
3. The gas burning compartment of your boiler is
completely sealed from the room in which it is fitted.
Products from the combustion of gas are vented to the
outside through the flue terminal which must be kept
free from obstruction as this would interfere with the
correct operation of the boiler.
4. The boiler may be installed in a cupboard if these
minimum clearances are kept. The compartment
should be large enough to house the boiler and
ancillary equipment only.
5. IT SHOULD NOT BE USED AS A STORAGE
CUPBOARD.
Check List
1. If a fault develops, or is suspected, call your
Installer or Service Engineer as soon as possible.
2. Go through the following check list before you make
contact.
a) Is the electricity supply on ?
b) Is the selector switch on (giving a green
“Power ON” light) and set for both Central Heating
and Domestic Hot Water ?
c) Is a fault suggested by the neon indicators ?
d) Is the gas supply on ?
e) Is the mains water supply turned on ?
f) Is the system pressure correct ?
g) Are the boiler temperature controls set high
enough ?
h) Is the time clock (if fitted) calling for central
heating ?
i) Is the room thermostat (if fitted) set high
enough ?
j) Are the radiator valves open ?
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200mm Min
780mm
450mm
200mm Min
5mm Min
5mm Min
8mm Min
450mm Min
For Servicing
Purposes
Fig. 15
Fig. 16
In Operation

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© Baxi Heating UK Ltd 2007
Cleaning the Outercase
The painted panels should be wiped with a damp
cloth and then dried completely. Do not use abrasive
cleaning agents.
Spare Parts
IMPORTANT - Only a competent person should be
used to service or repair this boiler.
1. Any repairs to the boiler will usually be the
responsibility of the Installer during the guarantee
period after which spare parts may be obtained
through approved Potterton stockists if required.
2. Quote the appliance name, model number and
where possible the part number when ordering
spares. A parts list is included in the Installation and
Servicing Instructions.
3. The name, model number, and serial number can
be found on a label on the inner face of the lower
right hand case panel (Fig 19).

10 © Baxi Heating UK Ltd 2007
Codes of Practice, most recent version should
be used
Legislation
This company declare that no substances harmful to
health are contained in the appliance or used during
appliance manufacture.
The appliance is suitable only for installation in GB
and IE and should be installed in accordance with
the rules in force, and only used in a suitably
ventilated location.
In GB, the installation must be carried out by a CORGI
Registered Installer. It must be carried out in accordance
with the relevant requirements of the:
• Gas Safety (Installation & Use) Regulations.
• The appropriate Building Regulations either The
Building Regulations, The Building Regulations
(Scotland), Building Regulations (Northern Ireland).
• The Water Fittings Regulations or Water Byelaws in
Scotland.
• 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.
All systems must be thoroughly flushed and treated
with inhibitor.
In GB the following Codes of Practice apply:
Standard Scope
BS 6891 Gas Installation.
BS 5546 Installation of hot water supplies for
domestic purposes.
BS 5449 Forced circulation hot water systems.
BS 6798 Installation of gas fired hot water boilers.
BS 5440 Part 1 Flues.
BS 5440 Part 2 Ventilation.
BS 7074 Expansion vessels and ancillary equipment
for sealed water systems.
BS 7593 Treatment of water in domestic hot water
central heating systems.
In IE the following Codes of Practice apply:
Standard Scope
I.S. 813 Domestic Gas Installations.
The following BS standards give valuable additional information;
BS 5546 Installation of hot water supplies for
domestic purposes.
BS 5449 Forced circulation hot water systems.
BS 7074 Expansion vessels and ancillary equipment
for sealed water systems.
BS 7593 Treatment of water in domestic hot water
central heating systems.