Potterton Assure Heat 13 Manual

Assure Heat
Insta ation and Service Manua
Condensing Central Heating Boiler
13 - 16 - 19 - 25 - 30
7@
United Kingdom
These instructions include the Benchmark Commissioning Checklist and should be left with the
user for safe keeping. They must be read in conjunction with the Flue Installation Guide.

2 Assure Heat 7684200-01 (06/17)
You have just purchased one of our appliances and we thank you for the trust you have placed in our products. Please note that
the product will provide good service for a longer period of time if it is regularly checked and maintained. Our customer support
network is at your disposal at all times.
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ISO 9001
FM 00866
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Benchmark places responsibilities on both manufacturers and installers.
The purpose is to ensure that customers are provided with the correct
equipment for their needs, that it is installed, commissioned and
serviced in accordance with the manufacturer’s instructions by
competent persons and that it meets the requirements of the
appropriate Building Regulations. The Benchmark Checklist can be
used to demonstrate compliance with Building Regulations and should
be provided to the customer for future reference.
Installers are required to carry out installation, commissioning and
servicing work in accordance with the Benchmark Code of Practice
which is available from the Heating and Hotwater Industry Council who
manage and promote the Scheme. Visit III57@FD3>:73F;@95AG= for
more information.
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The Health & Safety Executive operates the ‘ as Safe Register’, a self-
certification scheme for gas heating appliances.
This company is a member of the Benchmark initiative and fully
supports the aims of the programme. Its aim is to improve the
standards of installation and commissioning of central heating systems
in the UK and to encourage the regular servicing of all central heating
systems to ensure safety and efficiency.
Building Regulations require that installations should comply with
manufacturer's instructions. It is therefore important that the
commissioning checklist is completed by the installer. The relevant
section of Building Regulations only relates to dwellings. Therefore the
checklist only applies if the appliance is being installed in a dwelling or
some related structure.
The flowchart opposite gives guidance for installers on the process
necessary to ensure compliance with Building Regulations.
N3J;"73F;@9.$%F6 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 Limited, Brooks House, Coventry Road, Warwick. CV34 4LL
Full acknowledgement of author and source must be given.
0+'#'!: Any person who does any unauthorised act in relation to a copyright work may be liable to criminal prosecution and civil claims for
damages.
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.C.No 41-592-66
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.C.No 41-592-67
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.C.No 41-592-68
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.C.No 41-592-69
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.C.No 41-592-70

7684200-01 (06/17) Assure Heat 3
Installation Notification uidelines
Choose Building
Regulations Notification
Route
Contact your relevant Local
Authority Building Control
(LABC) who will arrange
an inspection or contact
a government approved
inspector
LABC will record the data
and will issue a
certificate of compliance
‘Gas Safe Register’ will issue a
Building Regulations Compliance
Certificate to the property owner
and inform the relevant LABC
You must ensure that the
certificate number issued by
the ‘Gas Safe Register’ is written
onto the Benchmark Checklist
Scheme Members only
Call ‘Gas Safe Register’ on:
0800 408 5577
or log onto:
www.gassaferegister.co.uk
within 10 days
If you notify via the ‘Gas Safe
Register’, the register will issue
the Building Regulations
certificate on members’ behalf
Complete the
Benchmark Checklist
Install and Commission this
appliance to manufacturer's
instructions
Competent Person's
Self Certification Scheme Building Control
Complete the
Benchmark Checklist
Install and Commission this
appliance to manufacturer's
instructions
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4 Assure Heat 7684200-01 (06/17)
Contents
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1.1 eneral
1.2 Additional Documentation
1.3 Symbols Used
1.4 Abbreviations
1.5 Extent of Liabilities
1.5.1 Manufacturer’s Liability
1.5.2 Installer’s Liability
1.6 Homologations
1.6.1 Certifications
1.6.2 Directives
1.6.3 Standards
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2.1 eneral Safety Instructions
2.2 Recommendations
2.3 Specific Safety Instructions
2.3.1 Handling
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3.1 Technical Data
3.2 Technical Parameters
3.2 Dimensions and Connections
3.3 Electrical Diagram
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4.1 eneral Description
4.2 Operating Principle
4.3 Main Components
4.4 Control Panel Description
4.4.1 User Interaction Controller
4.5 Standard Delivery
4.6 Accessories & Options
4.6.1 Optional Extras
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5.1 Installation Regulations
5.2 Installation Requirements
5.2.1 as Supply
5.2.2 Electrical Supply
5.2.3 Hard Water Areas
5.2.4 Bypass
5.2.5 System Control
5.2.6 Treatment of Water Circulating Systems
5.2.7 System Details - eneral
5.2.8 Low Head Installation / Open
5.2.9 Sealed Systems Details
5.3 Choice of the Location
5.3.1 Location of the Appliance
5.3.2 Data Plate
5.3.3 Bath & Shower Rooms
5.3.4 Ventilation
5.3.5 Condensate Drain
5.3.6 Clearances - Access in Service
5.3.7 Flue / Chimney Location
5.3.8 Horizontal Flue / Chimney Systems

7
8
8
8
9
9
10
10
10
10
11

12
12
13
13

14
15
16
17

18
19
20
21
21
21
21
21

22
22
22
22
23
23
23
23
24
24
25
26
26
26
26
26
27
29
30
32

7684200-01 (06/17) Assure Heat 5
Contents
5.3.9 Flue/Chimney Trim
5.3.10 Terminal uard
5.3.11 Flue/Chimney Deflector
5.3.12 Flue/Chimney Accessories
5.3.13 In Case Rear Flue
5.4 Unpacking & Initial Preparation
5.4.1 Unpacking
5.4.2 Initial Preparation
5.4.3 Making the Water Connection
5.4.4 Filling the Condensate Trap
5.4.5 Connecting the Condensate Drain
5.4.6 Connecting the as Supply
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6.1 Air Supply / Flue as Connections
6.1.1 Connecting the Top Flue
6.1.2 Connecting the ‘In Case’ Rear Flue
6.2 Electrical Connections
6.2.1 Electrical Connections of the Appliance
6.2.2 Connecting External Devices
6.3 Filling the System
6.4 Completing the Installation
6.4.1 Completion
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7.1 eneral
7.2 Checklist before Commissioning
7.2.1 Preliminary Electrical Checks
7.2.2 Checks
7.3 Commissioning Procedure
7.4 as Settings
7.4.1 ‘Chimney Sweep’ Mode
7.4.2 ‘Chimney Sweep’ Mode - Combustion Check
7.5 Configuring the System
7.5.1 Check the Operational (Working) as Inlet Pressure & as Rate
7.6 Final Instructions
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8.1 eneral
8.2 Start-Up
8.3 Shutdown
8.4 Use of the Control Panel
8.5 Frost Protection
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9.1 Parameters
33
33
33
33
33
34
34
34
35
35
35
35

36
36
38
40
40
40
41
41
41

42
42
42
42
42
43
43
44
45
45
46

47
47
47
47
47

47

6 Assure Heat 7684200-01 (06/17)
Contents
 &3;@F7@3@57
10.1 eneral
10.2 Standard Inspection & Maintenance Operation
10.3 Specific Maintenance Operation
10.3.1 Spark Ignition Electrode
10.3.2 Automatic Air Vent
10.3.3 Condensate Trap
10.3.4 Removal of Ducts
10.3.5 Pressure Switch (25 & 30 only)
10.3.6 Flow Temperature Sensor
10.3.7 Overheat Sensor
10.3.8 Return Temperature Sensor
10.3.9 User Interaction Controller
10.3.10 Combustion Control Unit
10.3.11 Setting the as Valve (CO2Check)
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11.1 Error Codes - Auto Reset
11.2 Lockout Condition
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12.1 Decommissioning Procedure
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13.1 eneral
13.2 Spare Parts List
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
48
49
51
51
51
51
52
52
52
53
53
53
54
55

56
57

58

59
59


7684200-01 (06/17) Assure Heat 7
Introduction 1
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Installation, repair and maintenance must only be
carried out only by a competent person. This
document is intended for use by competent persons,
0+'#'!
Check the information on the data plate is
compatible with local supply conditions.
All as Safe registered engineers carry an ID card with their
licence number and a photograph. You can check your engineer
is registered by telephoning 0800 408 5500 or online at
www.gassaferegister.co.uk
This appliance must be installed in accordance with the
manufacturer’s instructions and the regulations in force. If the
appliance is sold or transferred, or if the owner moves leaving
the appliance behind you should ensure that the manual is kept
with the appliance for consultation by the new owner and their
installer. Read the instructions fully before installing or using the
appliance.
#@! this must be carried out by a competent person as stated
in the as Safety (Installation & Use) Regulations (as may be
amended from time to time).
78;@;F;A@A85A?B7F7@57 A person who works for a as Safe
registered company and holding current certificates in the
relevant ACS modules, is deemed competent.
#@# this must be carried out by a competent person as stated
in I.S. 813 “Domestic as Installations”.
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 B this could also infringe the as Safety
(Installation and Use) Regulations.
The appliance is designed as a boiler for use in residential
domestic environments on a governed meter supply only. The
selection of this boiler is entirely at the owner’s risk. If the
appliance is used for purposes other than or in excess of these
specifications, the manufacturer will not accept any liability for
resulting loss, damage or injury.
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8 Assure Heat 7684200-01 (06/17)
1 Introduction
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"0: Domestic hot water
": Central heating
! reat Britain
# Ireland
,: British standard
""# Heating and Hotwater Industry Council
,&: Chimney Sweep Mode
).: Parameter Unit
): Printed Circuit Board
)@ Nominal output
*@ Nominal heat input
"E ross calorific value
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Risk of a dangerous situation causing serious
physical injury.
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Risk of a dangerous situation causing slight physical
injury.
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Risk of material damage.
Signals important information .
Signals a referral to other instructions or other pages
in the instructions.
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These Installation & Service Instructions must be read in
conjunction with the Flue Accessories & Fitting uide supplied in
the Literature Pack.
Various timers, external controls, flue accessories, etc. are
available as optional extras. Full details are contained in the
relevant sales literature.
In these instructions, various levels are employed to draw the
user's attention to particular information. In so doing, we wish to
safeguard the user's safety, prevent hazards and guarantee
correct operation of the appliance. Each level is accompanied by
a warning triangle

7684200-01 (06/17) Assure Heat 9
Introduction 1
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Our products are manufactured in compliance with the
requirements of the various european applicable Directives.
They are therefore delivered with marking and all relevant
documentation. In the interest of customers, we are
continuously endeavouring to make improvements in product
quality. All the specifications stated in this document are
therefore subject to change without notice.
The manufacturer will not accept any liability for loss, damage or
injury arising as a result of:-
Failure to abide by the instructions on using the appliance.
Failure to regularly maintain the appliance, or faulty or
inadequate maintenance of the appliance.
Failure to abide by the instructions on installing the
appliance.
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3BB>;3@57?3@G835FGD7
The appliance is suitable only for installation in B and IE and
should be installed in accordance with the rules in force, and
only used in a suitably ventilated location.
#@! the installation must be carried out by a as Safe
Registered Installer. It must be carried out in accordance with
the current and relevant requirements of legislation and
guidance including the:-
• as 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.
#@# the installation must be carried out by a competent person
and installed in accordance with the current edition of I.S. 813
‘Domestic as Installations’, the current Building Regulations
and reference should be made to the current ETCI rules for
electrical installation.
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Incorrect installation could invalidate the warranty and may lead
to prosecution.

10 Assure Heat 7684200-01 (06/17)
1 Introduction
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The installer is responsible for the installation and initial start up
of the appliance. The installer must adhere to the following:
Read and follow the instructions given in the manuals
provided with the appliance.
Carry out installation in compliance with the prevailing
legislation and standards.
Ensure the system is flushed and inhibitor added.
Install the flue/chimney system correctly ensuring it is
operational and complies with prevailing legislation and
standards, regardless of location of the boiler’s installation.
Only the installer should perform the initial start up and carry
out any checks necessary.
Explain the installation to the user.
Complete the Benchmark Commissioning Checklist - this is a
condition of the warranty !
Warn the user of the obligation to check the appliance and
maintain it in good working order.
ive all the instruction manuals to the user.
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Baxi Heating UK Limited being the manufacturer / distributor
within the European Economic Area of the following
Potterton Assure Heat
declare that the above is in conformity with the provisions of the
Council Directive
2009/142 EC 92/42 EEC 2004/108 EC 2006/95 EC
2009/125/EC 2010/30/EU
and has been subject to the following conformity procedures laid
down in
Annex 2 - Article 3 of 2009/142 EC
under the supervision of the British Standards Institution, a
Notified Body authorized by the United Kingdom Competent
Authority, and carrying the Notified Body Number 0086.
;D75F;H7E
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 0063.
Product/Production certified by:
Notified Body 0086.
For B/IE only.

7684200-01 (06/17) Assure Heat 11
Introduction 1
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In B the following Codes of Practice apply:
Standard Scope
BS 6891 as Installation.
BS 5546 Installation of hot water supplies for domestic
purposes.
BS EN 12828 Heating systems in buildings.
BS EN 12831 Heating systems in buildings - Calculation of
load.
BS EN 14336 Installation & commissioning of water based
heating 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 as Installations.
The following standards give valuable additional information;
BS 5546 Installation of hot water supplies for domestic
purposes.
BS EN 12828 Heating systems in buildings.
BS EN 12831 Heating systems in buildings - Calculation of
load.
BS EN 14336 Installation & commissioning of water based
heating systems.
BS 7074 Expansion vessels and ancillary equipment for
sealed water systems.
BS 7593 Treatment of water in domestic hot water
central heating systems.

12 Assure Heat 7684200-01 (06/17)
2 Safety
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If you smell gas:
1. Turn off the gas supply at the meter
2. Open windows and doors in the hazardous area
3. Do not operate light switches
4. Do not operate any electrical equipment
5. Do not use a telephone in the hazardous area
6. Extinguish any naked flame and do not smoke
7. Warn any other occupants and vacate the
premises
8. Telephone the National as Emergency Service
on:- 0800 111 999
0+'#'!
Installation, repair and maintenance must be carried
out by a !3E,387+79;EF7D76@9;@77D
(in accordance with prevailing local and national
regulations).
When working on the boiler, always disconnect the
boiler from the mains and close the main gas inlet
valve.
After maintenance or repair work, check the
installation to ensure that there are no leaks.
.-#('
The boiler should be protected from frost.
Only remove the casing for maintenance and repair
operations. Replace the casing after maintenance
and repair operations.
0+'#'!
This boiler can be used by children aged 8 years and
above and by persons with reduced physical, sensory
or mental capabilities or lack of experience and
knowledge when they have been given supervision or
instruction concerning the safe use of the device and
understand the resulting risks. Children must not be
allowed to play with the appliance. Cleaning and user
maintenance must not be carried out by children
without supervision.

7684200-01 (06/17) Assure Heat 13
Safety 2
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"3@6>;@9
!7@7D3>
• The following advice should be adhered to, from when first
handling the boiler to the final stages of installation, and
also during maintenance.
• Most injuries as a result of inappropriate handling and lifting
are to the back, but all other parts of the body are
vulnerable, particularly shoulders, arms and hands. Health
& Safety is the responsibility of EVERYONE.
• Before lifting the boiler, the circumstances of the installation
must be assessed, please use appropriate manual handling
techniques and equipment.
• Do not handle or lift unless you feel physically able.
• Wear appropriate Personal Protection Equipment
e.g. protective gloves, safety footwear etc.
)D7B3D3F;A@
• Co-ordinate movements - know where, and when, you are
both going.
• Minimise the number of times needed to move the boiler -
plan ahead.
• Always ensure when handling or lifting the route is clear
and unobstructed. If possible avoid steps, wet or slippery
surfaces, unlit areas etc. and take special care on
ladders/into lofts.
-75:@;CG7
• When handling or lifting always use safe techniques - keep
your back straight, bend your knees. Don’t twist - move your
feet, avoid bending forwards and sideways and keep the
load as close to your body as possible.
• Where possible transport the boiler using a sack truck or
other suitable trolley.
• Always grip the boiler firmly, and before lifting feel where the
weight is concentrated to establish the centre of gravity,
repositioning yourself as necessary. See the ‘Installation’
section of these instructions for recommended lift points.
+7?7?47D
• The circumstances of each installation are different. Always
assess the risks associated with handling and lifting
according to the individual conditions.
• If at any time when installing the boiler you feel that you
may have injured yourself STOP !! DO NOT ‘work through’
the pain - you may cause further injury.
# #''2(.-('(-"'%(+%# --"(#%+
(-#'/#(+,,#,-' (+)+(#'!

14 Assure Heat 7684200-01 (06/17)
3 Technical Specifications
 -75:@;53>,B75;8;53F;A@E
 -75:@;53>3F3
'(- All data in this section are nominal
values and subject to normal production
tolerances.
BB>;3@573F79ADK CAT I 2H
"AD;LA@F3>
>G7-7D?;@3> Diameter 100mm
;?7@E;A@E Projection 125mm
(GF7D53E7;?7@E;A@E
Overall Height Inc Flue Elbow - 790mm
Casing Height - 625mm
Casing Width - 370mm
Casing Depth - 270mm
A@@75F;A@E 
as Supply Connection - 22mm
Central Heating Flow
(use ONLY compression fitting) - 22mm
Central Heating Return
(use ONLY compression fitting) - 22mm
Condensate Drain - for 21.5mm
plastic waste pipe
+75A??7@676,KEF7?
-7?B7D3FGD7DAB 
Condensing 20°C
"73F#@BGF*@"E( ross)
Max Min
13 model kW 14.88 8.59
16 model kW 18.32 8.59
19 model kW 21.75 8.59
25 model kW 28.62 8.59
30 model kW 34.35 8.59
"73F(GFBGF)@
(Non Condensing 70° C Mean Water
Temp)
Max Min
13 model kW 13 7.5
16 model kW 16 7.5
19 model kW 19 7.5
25 model kW 25 7.5
30 model kW 30 7.5
>75FD;53>,GBB>K 230V~ 50Hz
(Appliance must be connected to an
earthed supply)
)AI7DA@EG?BF;A@&3J+3F7
13 model W 17
16 model W 20
19 model W 23
25 model W 33
30 model W 44
JF7D@3> GE7+3F;@9 3A 
#@F7D@3> GE7+3F;@9(Terminal Strip)
Fuse 1.6T
BB>;3@57-KB7C13 C33 'AJ>3EE5
03F7DA@F7@F
litres 1.7
,F3F;5"736
max 25 metres
%AI"736 0.4m min
,KEF7?7F3;>
fully pumped open vented & sealed systems
>75FD;53>)DAF75F;A@ IPX4D
((+3F;AUp to a maximum
of 0.004
>AI-7?B7D3FGD7(adjustable)
30° C to 80° C (± 5° C)
&3J!3E+3F7 (Natural as - 20)
(After 10 Mins)
m3/hr
13 model 1.42
16 model 1.75
19 model 2.07
25 model 2.73
30 model 3.27
,)@@G3>88;5;7@5K
?A67>?A67>
?A67>?A67>
?A67>
This value is used in the UK overnment’s Standard
Assessment Procedure (SAP) for energy rating of
dwellings. The test data from which it has been
calculated has been certified by 0063.
)DA6G5F:3D35F7D;EF;5E3F343E7
,.$
)D7EEGD7,I;F5:
13/16/19 Model - Not Fitted
25/30 Model - Fitted
300
250
200
150
100
50
00.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
Flow (m3hr)
Pressure drop vs Flow
Pressure drop (mbar)
>73D3@57E
Both Sides 5mm Min
Above Casing (Top Flue) 19 0mm Min
Above Casing (Rear Flue) 35mm Min
Below Casing (in Cupboard) 35mm Min
Below Casing 120 mm Min
Front (For Servicing) 500mm Min
Front (In Operation) 5mm Min
,77,75F;A@8AD8G>>67F3;>E
07;9:FE 
Packaged Boiler Carton 21.5 kg
Installation Lift Weight 19.5 kg
K@3?;5@A?;@3>#@>7F)D7EEGD7
(Natural as - 20)
mbar 20
with a CV of 37.78 MJ/m3

7684200-01 (06/17) Assure Heat 15
Technical Specification 3
 -75:@;53>)3D3?7F7DE
Technical parameters for boiler space heaters
Condensing boiler
Low-temperature boiler(1)
B1 boiler
Cogeneration space heater
Combination heater
Useful heat output at rated heat output
and high temperature regime
Useful heat output at 30% of rated heat
output and low temperature regime(1)
Useful efficiency at rated heat output and
high temperature regime(2)
Useful efficiency at 30% of rated heat
output and low temperature regime(1)
Full load
Part load
Standby mode
Standby heat loss
Ignition burner power consumption
Annual energy consumption
Sound power level, indoors
Emissions of nitrogen oxides
(1) Low temperature means for condensing boilers 30°C, for low temperature boilers 37°C and for other heaters 50°C return temperature (at
heater inlet).
(2) High temperature regime means 60°C return temperature at heater inlet and 80°C feed temperature at heater outlet.
SSeeee
The back cover for contact details.
Potterton Assure Heat
Rated heat output
Seasonal space heating energy efficiency
Auxiliary electricity consumption
Other items
Prated
kW
P4
kW
P1
kW
Šs
%
Š4
%
Š1
%
elmax
kW
elmin
kW
PSB
kW
Pstby
kW
Pign
kW
QHE
kWh
GJ
LWA
dB
NOXmg/kWh
13 16 19 25 30
Yes YesYesYesYes
No NoNoNoNo
No NoNoNoNo
No NoNoNoNo
No NoNoNoNo
13 30251916
13.0 30.025.019.016.0
4.3 10.18.46.45.4
93 93939393
88.0 87.587.787.887.9
98.0 98.098.098.098.0
0.017 0.0440.0330.0230.020
0.014 0.0140.0140.0140.014
00000
0.028 0.028
11183 25807215061634413764
0.0280.0280.028
-----
40 93775950
32 41373433
18 25242120

16 Assure Heat 7684200-01 (06/17)
3 Technical Specification
 ;?7@E;A@E3@6A@@75F;A@E
#&)(+-'- The 1.5° fall provided by the elbow is
to allow condensate to run back to the boiler, for
disposal through the condensate discharge pipe.
When using extensions the fall along the flue
system must be increased to 3°.
Where extensions are used ensure the clearance
above the top of the flue elbow (X) is as shown in
the table below:-
360° Orientation
Tube Ø 100mm




F%73EFM
F%73EF
M F%73EF
M
>G7>7@9F:2
up to 1m
1m - 2m
2m - 3m
3m - 4m
4m - 5m
5m - 6m
>73D3@571
30mm
84mm
134mm
186mm
238mm
290mm
'(- -:7D7?GEF47@AB3DFA8F:73;D6G5F
I:;F7FG47H;E;4>7AGFE;67F:7BDAB7DFK38F7D
;@EF3>>3F;A@-:78>G7E73>E:AG>68;F@73F>K3@6
78875F39AA6E73>
"

!
1
2??3J
DIMENSIONS
 625mm
 25mm
 270mm
 370mm
 116mm Ø Min.
 165mm
155mm
! 110mm
" 550mm

For clearances see
Section 5.3.6

7684200-01 (06/17) Assure Heat 17
Technical Specification 3
 >75FD;53>;39D3?
Gas Valve
Electrode
br
br
b
g/y
g/y
r
Safety
Thermostat
Return
Sensor
Flow
Sensor
Parameter
Unit
Pressure Switch
(wherefitted)
User Interaction
Controller
r
b
Not used
Loop Connector
(where no pressure
switch fitted)
Key To Wiring Colours
b - Blue
r - Red
br - Brown
g/y - Green/Yellow
bk - Black
FROMTOCOLOUR LINK
PRESURE SWITCH
PRESURE SWITCH
COMBI ONLY
COMBI ONLY
COMBI ONLY
FLOW TEMP
FLOW TEMP
RETURN TEMP
RETURN TEMP
FLOW SENSOR
FLOW SENSOR
FLOW SENSOR
HIGH LIMIT BLACK
BLACK
BLACK
BLACK
BLUE
RED
PSU
PSU
PSU
PSU
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
HIGH LIMIT
1
2
3
4
5
6
7
8
9
10
11
12
13
13 1
23456789101112
bk
bk
bk
bk
bk
bk bk
bk
bk
1
13
Mains
Electrical
Test Point
g/y
br
b
LN

18 Assure Heat 7684200-01 (06/17)
4 Description of the Product
 7E5D;BF;A@A8F:7)DA6G5F
 !7@7D3>7E5D;BF;A@
1. The Potterton Assure Heat Range are gas fired wall mounted
powered flue condensing boilers.
2. The maximum output of the boiler is :-
13 model - 13 kW
16 model - 16 kW
19 model - 19 kW
25 model - 25 kW
30 model - 30 kW
3. The boiler modulates automatically to the system load up to
the set output. It is designed for use on Natural as ( 20) only.
4. The two illuminated User Interaction Controller push buttons
provide information about the operating condition of the boiler.
5. The boiler is suitable for fully pumped open vented central
heating and domestic hot water systems and sealed systems.
6. An information label giving details of the model, serial number
and as Council number is situated on the front left underside of
the outercase and is accessed by pulling forward gently (Fig. 1).
7. The boiler data label is positioned on the inside lower right-
hand side of the boiler and can be seen when the outercase
panel is removed (Fig. 1).
8. The boiler is intended to be installed in residential/domestic
environments on a governed meter supply only.
9. The boiler must be installed with one of the purpose designed
flues such as one of the standard telescopic flue kits detailed in
the Flue Accessories & Fitting uide.
All systems must be thoroughly cleansed, flushed and
treated with inhibitor (see Section 5.2.6).
These Installation & Servicing Instructions MUST be
read in conjunction with the Flue Accessories & Fitting uide
supplied in the Literature Pack.
Information
Label
Slide
Forward
;9
Data Label

7684200-01 (06/17) Assure Heat 19
Description of the Product 4
 (B7D3F;@9)D;@5;B>7
1. ,I;F5:76%;H7(@ When the boiler switched live turns on
the boiler, a 20 second check cycle takes place. If the flow
temperature is less than the boiler set-point temperature the
ignition cycle will start. Pre-purge, Ignition and Burner on.
2. 3@)D7)GD97 The boiler has a 10 second pre-purge (Fan
On, Spark enerator and as Valve off) before the start of the
ignition sequence.
3. #9@;F;A@ The boiler has a 5 second ignition period (Fan,
Spark enerator and as Valve on) and burner on occurs when
a flame is detected. If a flame is not detected within the 5
second ignition period then 4 more ignition attempts are made.
If a flame is not detected after the 5 ignition attempts the boiler
goes to an ignition lock-out and an error code is displayed.
4. GD@7DA@ After a successful ignition, Burner on occurs (Fan
and as Valve on, Spark enerator off). The boiler flow
temperature is controlled by varying the fan speed (and thereby
the gas rate) to achieve the optimum boiler operation. If the
boiler flow temperature exceeds the boiler set-point, the burner
will turn off (Fan and as Valve off).
5. (H7DF7?B7D3FGD7 If a boiler overtemperature event occurs
(triggering the safety thermostat) the burner shuts down (Fan off
and as Valve off). A locking signal is generated and an error
code is displayed.
6. %A5=AGF If a lock-out error is displayed (Fan, Spark
enerator and as Valve off) the boiler can only be reset by
manually pressing the reset button. If 5 lock-outs are reset
within a 1 hour period then boiler becomes inoperable. It is
necessary to switch off the power supply to the boiler, and when
reinstated the reset button pressed again to operate the
appliance.
Any lock-out errors that occur regularly will require further
investigation and rectification.
Baxi Customer Support: 0344 871 1545.
Mains On.
(CH or DHW demand)
Self test cycle for 20s
(output setting displayed)
Flow
temperature less
than set point ?
10 second pre-purge
5 second ignition
Burner on
Modulate output
Ignition Lockout
Burner Off
Lockout
Mains Off
(Demand satisfied)
Flame detected ? 5th ignition attempt ?
NO
NO
NO
NO
YES
YES
YES YES
YES
Flow temp or
rate of rise too
high ?
Over Temp
Fault ?

20 Assure Heat 7684200-01 (06/17)
4 Description of the Product
 &3;@A?BA@7@FE
1. Heat Exchanger
2. Combustion Control Unit
3. Condensate Trap
4. Exhaust Tube
5. Inlet Silencer
6. User Interaction Controller
7. as Cock
8. Air Pressure Switch (25 & 30 models only)
9. System Drain Cock
10. Air Vent
1
2
3
4
5
67
8
9
10