Potterton Performa 24i HE User manual

User’s Guide Performa
24i HE
This is a Wall Mounted Powered Flue Condensing 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 0051.
Product/Production certified by:
Notified Body 0051.
For use in GB/IE only.

2Publication No. 5111814
Natural Gas
Potterton Performa 24i HE
G.C.No47 393 12
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.
“Benchmark”Log Book
As part of the industry-wide “Benchmark”initiative all Potterton
boilers now include an Installation, Commissioning and
Service Record Log Book. Please read the Log Book carefully
and complete all sections relevant to the appliance and
installation. These include sections on the type of controls
employed, flushing the system, burner operating pressure etc.
The details of the Log Book will be required in the event of any
warranty work. Also, there is a section to be completed at
each subsequent regular service visit. The Log Book must be
left with the user.
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
This product has an energy rating (B) on a scale of A to G.
For more information see www.boilers.org.uk. This is a certification mark.

3
Publication No. 5111814
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.
2. Any purpose provided ventilation should be checked
periodically to ensure that it is free from obstruction.
Electricity Supply
1. THIS APPLIANCE MUST BE EARTHED.
2. A standard 230V ~ 50Hz supply 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

4Publication No. 5111814
Introduction
1. Your Potterton Performa 24i HE is a gas fired,
room sealed, powered flue condensing 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.
3. Due to the high efficiency and resultant low flue
gas temperature when in condensing mode a white
plume of condensate will be emitted from the
terminal. This will be particularly evident during
periods of low outside temperature.
Instant Domestic Hot Water
1. The boiler expansion vessel incorporates a small
volume of stored primary hot water.
2. When the boiler has been off and there is then a
demand for domestic hot water the stored primary
hot water ensures that domestic hot water is
supplied instantly at temperature.
3. The stored hot water is part of the primary circuit.
This is not supplied as domestic hot water, which is
fresh mains water heated by a heat exchanger within
the boiler.
4. The stored primary hot water temperature is
maintained whilst the boiler is in operation. During a
period when there is no demand for heating or hot
water the temperature of the stored primary hot
water will eventually fall. The boiler will operate
occasionally in order to maintain the temperature.
This is indicated by the domestic hot water mode
neon flashing (item 13 of Fig. 3).
Facia Panel
1. The facia panel is behind the hinged lower door
panel. As well as the on/off/reset selector switch,
central heating temperature control knob, pre-heat
control and pressure gauge, the facia incorporates
ten neon indicator lights.
2. Neons 12 to 15 indicate the operational status of
the boiler. Neons 6 to 11 have a dual function,
indicating the temperature of the central heating
water when constantly illuminated. If a fault develops
the appropriate neon will begin to flash.
2
1
0
4
3
bar
30°40°50°60°70°80°
Reset
Off
On Preheat
Fig. 3
30°40°50°60°70°80°
1. On/Off/Reset Selector Switch
2. Central Heating Temperature Control
3. Pre-Heat Control
4. Central Heating System Pressure Gauge
5. Optional Integral Timer Position
Neon Indicators
6. Flame Failure or Blocked Condensate Drain
7. Safety Thermostat Activated (Boiler or Flue)
8. Fault on Fan or Flue
9. Fault on Pump or Low System Pressure
10. Fault on Hot Water Sensor
11. Fault on Central Heating Sensor
12. Power On
13. Domestic Hot Water Mode
14. Central Heating Mode
15. Burner On
32145
6 7 8 9 10 11
12 13 14 15
KEY TO FACIA PANEL (Fig. 3)
When neons 6 to 11 are
constantly illuminated, they
indicate the temperature of
the central heating water.
Hinged Lower
Door Panel
Facia Panel

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Publication No. 5111814
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. 4).
2. Turn the On/Off/Reset selector switch either anti-
clockwise from the off position (Fig. 6) to both central
heating and domestic hot water or clockwise to
domestic hot water only.
3. In either position the green power on neon
( ) will illuminate (Fig. 5).
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. 7).
Priority is given to domestic hot water. The central
heating neon ( ) will illuminate when the boiler is
supplying central heating. If there is a demand for
domestic hot water the ( ) neon will illuminate and
the central heating neon ( ) will extinguish (Fig. 5).
Neons 6 to 11 will illuminate as the temperature rises.
5. Position (ii) In this position hot water will be
provided when a tap or shower is turned on
(Fig. 8). The hot water neon ( ) will illuminate (Fig.
5).
6. The boiler will light automatically on demand.
7. The orange burner on neon ( ) will illuminate
when the boiler is operating and the main burner is on
(Fig. 5).
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).
2
1
0
4
3
bar
30°40°50°60°70°80°
Reset
Off
On Preheat
Reset
Reset
Position (ii)
(Hot Water)
Fig. 7
Fig. 8
Reset
OFF Position
Fig. 6
Fig. 5
Fig. 4
2
1
0
4
3
bar
Power On
Neon Burner On
Neon
Central Heating
System Pressure
Gauge
Position (i)
(Central Heating or Hot Water)
On/Off/Reset
Selector Switch
Central
Heating Neon
Domestic
Hot Water
Neon
30°40°50°60°70°80°
6 7 8 9 10 11

6Publication No. 5111814
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. 9).
3. In normal winter usage we recommend that the
central heating temperature be set at maximum.
4. Domestic Hot Water Pre-Heat: To enjoy optimum
performance of the boiler the pre-heat control should
be set fully clockwise to the ON position (Fig. 10).
When there is a demand for hot water it will be
supplied at approximately 65°C instantaneously.
5. Turning the control 15°clockwise from the OFF
position will activate the pre-heat feature. Hot water
will be supplied at approximately 35°C
instantaneously.
6. To increase the temperature turn the control further
clockwise. For example, when set 90°clockwise the
boiler will supply hot water at approximately 44°C
instantaneously. At a position 180°from clockwise (i.e.
straight down) the hot water will be supplied at 52°C
instantaneously.
7. When the control is set anywhere between 15°
clockwise from the OFF position and the ON position,
the pre-heat feature will operate.
8. With the control in the OFF position (Fig. 11) the
pre-heat feature will not operate. Hot water will be
supplied at approximately 50°C.
9. The pre-heat feature will function with the selector
switch in either operating position. This is indicated by
the domestic hot water mode neon flashing (Fig. 12).
10. 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.
Flame Failure Reset
1. The red flame failure neon ( ) will illuminate in the
event of the burner failing to light, when incomplete
lighting of the burner occurs or blockage of the
condensate drain (Fig. 12).
2. Turn the selector switch fully anti-clockwise against
the spring pressure to the ‘Reset’position for at least
two seconds and release (Fig. 13). Set the selector to
the required position to light the boiler.
3. If the flame failure light illuminates repeatedly a fault
is indicated with either the boiler, the gas supply or the
condensate drain. Your Installer or Service Engineer
should be contacted as soon as possible.
Off
On Preheat
Reset
Domestic Hot Water
Pre-Heat Control
ON Position
Fig. 9
Central Heating
Temperature Control
Fig. 10
Reset Position
Fig. 13
30°40°50°60°70°80°
Flame Failure
Neon
Fig. 12
Off
On Preheat
Fig. 11
Domestic Hot Water
Pre-Heat Control
OFF Position
Domestic Hot
Water Neon

7
Publication No. 5111814
Safety Thermostat
1. Your Potterton Performa 24i HE is fitted with
additional safety devices, which shut down the boiler
in the event of the system, the boiler or the flue
overheating. The safety thermostat neon ( ) will light
in this instance (Fig. 14).
2. To reset: Turn the selector fully anti-clockwise
against the spring pressure to the ‘Reset’position, for
at least two seconds and release (Fig. 15). Set the
selector to the required position to light the boiler.
3. If after turning the selector to the ‘Reset’position
the boiler does not relight or the safety thermostat
operates repeatedly, causing boiler shutdown, a fault
is indicated. Your Installer or Service Engineer should
be contacted as soon as possible.
Air Flow Monitor
1. The boiler is fitted with an air pressure sensing
device. This monitors the flue system.
2. If the neon illuminates ( ) it indicates that the
flue or flue terminal is blocked or obstructed in some
way, or that there is an internal fault. If there is no
external blockage of the flue terminal that can be
easily removed contact your Installer or Service
Engineer (Fig. 14).
Pump Fault or Low Pressure
1. The neon ( ) will illuminate if the circulating
pump is faulty or the system pressure drops below
the minimum requirement (Fig. 14).
2. Check the pressure gauge as described on page 8.
If the pressure is in the normal range, a pump fault is
indicated. Contact your Installer or Service Engineer
to determine the nature of the fault.
Sensor Fault
1. When the ( ) or ( ) neon is illuminated a fault
on the hot water or central heating temperature
sensor is indicated (Fig. 14). Contact your Installer or
Service Engineer.
Pump Protection
1. With the selector switch in either Position (i) or
Position (ii) (Figs. 16 & 17) the pump will
automatically operate for 1 minute in every 24 hours
to prevent sticking.
30°40°50°60°70°80°
Air Flow
Monitor Neon
Pump/Low
Pressure Neon
Sensor Fault
Neons
Reset
Reset
Fig. 14
Fig. 16
Fig. 17
Safety
Thermostat
Neon
Reset
Reset Position
Fig. 15

8Publication No. 5111814
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.
18 & 19).
3. A pressure of 3 or greater indicates a fault. The
safety pressure relief valve will operate, at a pressure
of 3 (Fig. 20). 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. 21).
To Shut Off the Boiler
1. For short periods: Turn the selector switch to the
OFF position (Fig. 22).
2. For long periods: Turn off the selector switch (Fig.
22), 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 there is
additional 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).
Frost Protection Mode
1. The frost protection feature will operate when the
selector switch is in the central heating and domestic
hot water mode.
The gas and electrical supplies to the boiler must be
on and the system pressure must be within the range
described above.
2. If the system temperature falls below 5°C, then the
boiler will fire until the water temperature has been
raised.
3. Further frost protection can be incorporated by
using a frost thermostat to protect the whole system.
2
1
0
4
3
bar
2
1
0
4
3
bar
2
1
0
4
3
bar
2
1
0
4
3
bar
ON/OFF
Selector Switch
Reset
OFF Position
Fig. 22
Normal Pressure (when cold)
Normal Pressure (operating)
Fig. 18
Fault
Fig. 19
Below Minimum
Fig. 20
Fig. 21
Pressure Gauge

9
Publication No. 5111814
Clearances around the Boiler (Figs. 23 & 24)
1. The minimum clear spaces needed around the boiler
measured from the casing are as follows:
Top - 200mm
Bottom - 200mm
Left Side - 5mm
Right Side - 20mm/5mm
Front - 5mm (In Operation)
- 450mm (For Servicing)
*NOTE: The boiler can be operated with a clearance
of 5mm at the right. This is also sufficient for routine
maintenance. However a clearance of 20mm is
required if it is necessary to remove the secondary
heat exchanger. This should be considered when
siting the appliance and in the event of any
subsequent alteration in the area of installation.
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 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”
neon) and set for both Central Heating and
Domestic Hot Water ?
c) Is the red “Flame Failure”neon lit ? Turn the
On/Off/Reset selector fully anti-clockwise.
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 ?
200mm Min
780mm
450mm
200mm Min
20mm/5mm Min
see *NOTE:
5mm Min
5mm
450mm Min
For Servicing
Purposes
Fig. 23
Fig. 24
In Operation

10 Publication No. 5111814
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 the information label on the rear of the
hinged lower door panel (see back page).

11
Publication No. 5111814
Codes of Practice, most recent version should
be used
Legislation
Potterton 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.

All descriptions and illustrations provided in this leaflet have been
carefully prepared but we reserve the right to make changes and
improvements in our products which may affect the accuracy of the
information contained in this leaflet. All goods are sold subject to
our standard Conditions of Sale which are available on request.
General Enquiries (GB)
Tel. [phone]
Technical (GB)
Tel. [phone]
Service (GB)
Tel. [phone]
Fax. [phone]
Literature Request (GB)
Tel. [phone]
Technical (IE)
Tel. [phone]
BAXI POTTERTON
A Trading Division of Baxi Heating UK Ltd
Brownedge Road Bamber Bridge Preston Lancashire PR5 6UP
After Sales Service 08706 096 096 Technical Enquiries 08706 049 049
Website www.potterton.co.uk
company
Publication No. 5111814 - Iss. 1 (06/2004)
When contacting Baxi Potterton please have the
following information to hand:
Appliance Name
Model Number
Serial Number
A label giving these details is situated on the rear
of the hinged lower door panel.
Information Label
923.627.1