Potterton Performa 28 User manual

User’s Guide Performa 28
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 0051.
Product/Production certified by:
Notified Body 0086.
For use in GB/IE only.

2Publication No. 5113938
Natural Gas
Potterton Performa 28
G.C.No47 393 07
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, 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 Commissioning Checklist
Please ensure that your installer hands you the boiler
Installation & Service Instructions with the Benchmark
Commissioning Checklist sections completed. The details in
the Checklist will be required in the event of any warranty
work. Keep the instructions in a safe place and ensure that the
Service Interval Record at the back is completed at each
service visit.
CORGI
All CORGI registered installers carry a CORGI identification
card and have a registration number. You can check your
installer is registered by telephoning 0870 4012300 or writing
to:-
1 Elmwood,
Chineham Business Park,
Crockford Lane,
Basingstoke. RG24 8WG
or check online at www.corgi-gas-safety.com

3
Publication No. 5113938
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 ~ 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. 5113938
Introduction
1. Your Potterton Performa 28 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.
Facia Panel
1. The facia panel is behind the hinged lower door.
As well as the on/off/reset selector switch,
temperature control knobs 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
Fig. 3
30°40°50°60°70°80°
1. On/Off/Reset Selector Switch
2. Central Heating Temperature Control
3. Hot Water Temperature Control
4. Central Heating System Pressure Gauge
5. Optional Integral Timer Position
Neon Indicators
6. Flame Failure
7. Safety Thermostat Activated
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
When neons 6 to 11 are constantly illuminated,
they indicate the temperature of the central
heating water
32145
6 7 8 9 10 11
12 13 14 15
KEY TO FACIA PANEL (Fig. 3)

5
Publication No. 5113938
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
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. 5113938
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: 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. 10).
5. The temperature of the water is also dependent on
the water flow rate and the temperature of the mains
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.
Flame Failure Reset
1. The red flame failure neon ( ) will illuminate in the
event of the burner failing to light, or when incomplete
lighting of the burner occurs (Fig. 11).
2. Turn the selector switch fully anti-clockwise against
the spring pressure to the reset position, hold for at
least 3 seconds and release (Fig. 12). Set the selector
to the required position to light the boiler.
3. If the flame failure light illuminates repeatedly a
fault is indicated. Your Installer or Service Engineer
should be contacted as soon as possible.
Safety Thermostat
1. Your Potterton Performa 28 is fitted with an
additional safety device, which shuts down the boiler
in the event of the system or the boiler overheating.
The safety thermostat neon ( ) will light in this
instance (Fig. 11).
2. To reset: Turn the selector fully anti-clockwise
against the spring pressure to the reset position, hold
for at least 3 seconds and release (Fig. 12). Set the
selector to the required position to light the boiler.
3. If the safety thermostat operates repeatedly,
causing boiler shutdown, a fault is indicated. Your
Installer or Service Engineer should be contacted as
soon as possible.
Reset
Domestic Hot Water
Temperature Control
Fig. 9
Central Heating
Temperature Control
Fig. 10
Reset Position
Fig. 12
30°40°50°60°70°80°
Flame Failure
Neon
Fig. 11
Safety Thermostat
Neon

7
Publication No. 5113938
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. 12).
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. 12).
2. Check the pressure gauge as described in Section
‘Central Heating System Pressure’. 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. 12). Contact your Installer or Service
Engineer.
Pump Protection
1. With the selector switch in either Position (i) or
Position (ii) (Figs. 13 & 14) 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. 12
Fig. 13
Fig. 14

8Publication No. 5113938
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.
15 & 16).
3. A pressure of 3 or greater indicates a fault. The
safety pressure relief valve will operate, at a pressure
of 3 (Fig. 17). 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. 18).
To Shut Off the Boiler
1. For short periods: Turn the selector switch to the
OFF position (Fig. 19).
2. For long periods: Turn off the selector switch
(Fig.19), 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 in Section ‘Central Heating System
Pressure’.
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. 19
Normal Pressure (when cold)
Normal Pressure (operating)
Fig. 15
Fault
Fig. 16
Below Minimum
Fig. 17
Fig. 18
Pressure Gauge

9
Publication No. 5113938
Clearances around the Boiler (Figs. 20 & 21)
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”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 anticlockwise.
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
5mm Min
5mm Min
5mm Min
450mm Min
For Servicing
Purposes
Fig. 20
Fig. 21
In Operation

10 Publication No. 5113938
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 back of the
hinged lower door (Fig. 22).

11
Publication No. 5113938
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. 5113938 - Iss. 2 (03/2005)
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.
Hinged Lower
Door Panel
Information Label