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USER
GUIDE
HEAT 2
45 55 45P 55P
When replacing any part on this appliance, use only spare parts that you can be assured conform to the safety and performance
specication that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Keston.
For the very latest copy of literature for specication and maintenance practices visit our website www.keston.co.uk
where you can download the relevant information in PDF format.
October 2020
UIN 220384 A06
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CONTENTS
1. Introduction ................................................... 3
Safety .............................................................. 3
Electricity Supply ............................................. 3
Important Notes ............................................... 4
Minimum Clearances ....................................... 4
2. Boiler Operation ............................................ 5
Controls Diagram............................................. 5
To light the boiler ............................................. 6
Operating Status.............................................. 7
Settings............................................................ 8
3. Installer Connections .................................. 20
4. Faults ............................................................ 21
Faults - Hardware (Thermistors, Actuators)... 22
Faults - Temperature Supervisions ................ 23
Faults -
Faults - Internal System................................. 25
5. General Information .................................... 26
To shut down the boiler .................................. 26
To relight the boiler ........................................ 26
Frost Protection ............................................. 26
Boiler Overheat Thermostat .......................... 29
Condensate Drain.......................................... 26
Escape of Gas ............................................... 27
Cleaning ........................................................ 27
6. System Set up information ......................... 28
System (Flame, Fan, Hydraulic, etc.)
. 24
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KESTON HEAT2
45, 55
45, 55P
Natural Gas & Propane
Destination Countries: GB, IE, RO
1. INTRODUCTION
The KESTON HEAT2 is a wall mounted,
room sealed, super efcient condensing
boiler featuring full sequence automatic
spark ignition and fan assisted
combustion.
Due to the very high efciency, condensate
is produced from the ue gases and this
is drained to a suitable disposal point
through the plastic waste pipe at the
bottom of the boiler. A condensate
‘plume’ will also often be visible at the
ue terminal.
SAFETY
Current Gas Safety (Installation & Use)
Regulations or rules in force.
In your own interest, and that of safety, it
is the law that this boiler must be installed
and maintained by a suitably qualied
Gas Safe registered engineer or in IE a
competent person, in accordance with the
above regulations.
The appliance should be serviced at
least once a year by a suitably qualied
Gas Safe registered engineer or in IE a
competent person.
It is essential that the instructions in this
booklet are strictly followed, for safe and
economical operation of the boiler.
ELECTRICITY SUPPLY
The appliance must be earthed.
Supply 230 V - 50 Hz, 4 Amp fuse.
This appliance is intended to be connected
to the supply via a double-pole switch,
having a 3mm contact separation in both
poles, serving only the boiler and system
controls.
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IMPORTANT NOTES
• This appliance must not be operated
without the casing correctly tted and
forming an adequate seal.
• If the boiler is installed in a
compartment then the compartment
MUST NOT be used for storage
purposes.
• Do not store objects around or on the
boiler, and keep access clear at all
times.
• Do not obstruct ventilation ducts,
condensate pipework, grilles or
openings in the boiler room, room
space or compartment that the
appliance is installed in, or the
passage of combustion and ventilation
to the boiler.
• Do not turn off the boiler if it is to be
left unattended in frosty weather.
• If it is known or suspected that a fault
exists on the boiler then it MUST NOT
BE USED until the fault has been
corrected by a suitably qualied Gas
Safe registered engineer or in IE a
competent person.
• Flammable materials must not
be placed in close proximity to
the appliance. Materials giving off
ammable vapours must not be stored
in the same room as the appliance.
This appliance can
•
be used by children 8
years and above. Also
persons with reduced
physical, sensory or
mental capabilities, or
lack of experience and
knowledge, provided
they have been given
supervision or instruction
concerning use of the
appliance in a safe
way and understand
the hazards involved.
Children shall not play
with the appliance.
Cleaning and user
maintenance shall not be
made by children without
supervision.
• Children should be supervised to
ensure that they do not play with the
appliance.
In cases of repeated or continuous shutdown
a suitably qualified Gas Safe registered
engineer or in IE a competent person
should be called to investigate and rectify
the condition causing this and carry out an
operational test after each intervention on the
device. Only the manufacturers original parts
should be used for replacement.
MINIMUM CLEARANCES
Clearances of 450mm above, 300mm below,
25mm at the sides and 450mm at the front
of the boiler casing must be allowed for
servicing.
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2. BOILER OPERATION
CONTROL DIAGRAM
A B C D E F
BACK
OK
A. ROTARY KNOB
• Enter a menu, if in the normal
operation screen, and highlight the
rst menu item.
Scroll up (anti-clockwise) or down
•
(clockwise) in a menu
• Change the value in parameter
setting.
• If an error is showing in the title
bar, scroll to the associated error
screen(s), and return.
B. LCD DISPLAY SCREEN
• Menu and status display.
C. BURNER LED
• Will be on if the burner is lit.
D. SELECT BUTTON
• Enter a menu, if in the normal
operation screen, and highlight the
rst menu item.
• Enter the highlighted menu (sub
menu or parameter), if in a menu or
sub menu.
• If in a parameter setting, select a
parameter which will then ash for
adjustment, once adjusted using the
rotary knob press again to store and
move on.
E. BACK BUTTON
• In a menu, return to the previous
menu layer.
• In parameter setting, exit the
parameter without storing the value.
• In a guided assistant, go back to the
previous screen.
F. RESET BUTTON
• Reset the associated boiler module
error, if a resettable (lockout) error is
active.
• Return to the normal operation
screen.
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TO LIGHT THE BOILER
A. Stand alone boiler, or a master
boiler in a cascade, or a master
boiler with an extension module:
Set the operating mode in the plant
menu operating mode to: Automatic
Ensure that there is a demand
present on the boiler from the
external controls, depending upon the
conguration.
If there are no local heating or DHW
circuits, set the plant / operating mode
to: Day
If there are local heating circuits,
set one of them - heating circuits /
HC1 Boiler 1.1 or HC2 Boiler 1.2 /
Operating mode to: Day
If there is a local DHW circuit set the
DHW / Operating mode / DHW1 Boiler
1 to: Day
If there is an extension module
congured with Heating circuits or
DHW circuits set the Operating mode
to: Day
e.g. Heating circuits / Operating mode
/ HCx EMy.z
DHW / Operating mode / DHWx
EMy.z
Key: x is the Heating or DHW circuit
number, y is the Extension Module
designation and z its local Heating or
DHW circuit designation.
B. Slave Boiler in a Cascade:
Refer to the Installation manual.
The boiler will commence the ignition sequence, supplying heat to the system. Ensure that
the controls are then set to the operating mode required.
Note. Not all menus and options will be available depending upon the access level selected.
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OPERATING STATUS
The status screens are dependent upon the boiler conguration, they are shown below:
KESTON HEAT 2 55kW
Operation: Htg. with temp.
Master non cascade
Flow Set point: 40.2ºC
Flow temp: 40.2ºC
KESTON HEAT 2 55kW
Operation: Htg. with capacity
Capacity Set point: 40%
Master non cascade / cascade Slave
Capacity: 0%
Flow temp: 40.2ºC
KESTON HEAT 2 55kW
Operation: Htg. with temp.
Voltage: 5.6V
Flow Set point: 40.2ºC
Flow temp: 40.2ºC
KESTON HEAT 2 55kW
Operation: Htg. with capacity
Voltage: 5.6V
Capacity Set point: 40%
Capacity: 0%
Master non cascade,
0-10V control
The heating circuits and DHW circuits also have status screens associated with them. e.g.
KESTON HEAT 2 55kW
Status: OpenTherm
Operation: Day
Room set point: 20.0ºC
Menu item: Heating circuit / Status / Summary /
HC1 Boiler 1.1
Flow set point: 60.0ºC
KESTON HEAT 2 55kW
Status:
Operation: Night
Tank temperature: 45.0ºC
Menu item: DHW / Status / Summary / HC1
Boiler 1.1
Flow set point: 30.0ºC
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SETTINGS
1. Heating Circuits
Menu
Plant
Heating circuits
DHW
Each heating circuit that is congured has the following settings:
a. Operating mode selection:
Every heating circuit can be
individually set to one of the
following modes;
Standby / Time clock single day
/ Time clock multiple day / Day /
Night.....e.g.:
Heating circuits
Status
Operating mode
Room temperature
Flow temperature
b. Room temperature
A temperature can be set for each
heating circuit for the following periods:
Day / Night / Holiday.....e.g.:
Heating circuits
Operating mode
Room temperature
Flow temperature
Settings
Room temperature
Heating circuits
HC1 Boiler 1.1
HC2 Boiler 1.2
HC1 Boiler 1.1
Operating mode
Standby
HC1 Boiler 1.1
HC2 Boiler 1.2
HC1 Boiler 1.1
Room temperature. day
Room temperature. night
Room temperature. holiday
Room temperature, day
20.0
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c. Flow temperature
A maximum ow temperature can be
set for each heating circuit for the
following periods
Day / Night / Holiday.....e.g.:
Heating circuits
Room temperature
Flow temperature
Settings
Time clock
Flow temperature
HC1 Boiler 1.1
HC2 Boiler 1.2
HC1 Boiler 1.1
Flow temperature. day
Flow temperature. night
Flow temperature. holiday
Flow temperature, day
70.0
d. Settings
Each heating circuit has a number
of settings that can be congured.
Most settings are only accessible
at Installer access levels.
Day / Night / Holiday.....e.g.:
Heating circuits
Flow temperature
Settings
Time clock
Holiday program
Settings
HC1 Boiler 1.1
i. Preheat - Preheat can be enabled
for a heating circuit and a
maximum time can be set.
HC1 Boiler 1.1
Preheat
Heating limit
Room temp. switch diff.
Preheat
Preheat switch
Maximum preheat time
CONTINUED OVERLEAF
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i. Preheat - Preheat can be enabled
for a heating circuit and a
maximum time can be set.
HC1 Boiler 1.1
Preheat
Heating limit
Room temp. switch diff.
ii. Heating Limit- Heating limit can be
enabled for a heating circuit with a
limit temperature set.
HC1 Boiler 1.1
Preheat
Heating limit
Room temp. switch diff.
Pump
Preheat
Preheat switch
Maximum preheat time
Preheat switch
On/Off
Preheat switch
On/Off
Preheat
Preheat switch
Maximum preheat time
Maximum preheat time
120 minutes
Heating limit
Heating limit switch
Heating limit temperature
Heating limit switch
On/Off
Heating limit switch
On/Off
Heating limit
Heating limit switch
Heating limit temperature
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Heating limit temperature
On/Off
Heating limit temperature
On/Off
iv. Pump - The heating circuit pump
overrun time can be set here.
If the heating circuit pump is
controlled by 0-10V then additional
speed parameters can be set..
HC1 Boiler 1.1
Room temp. switch diff.
Pump
Frost protection
Pump
iii. Room Temperature Switching
Differential - When a room sensor
is congured for a heating circuit,
the switching differential may be
set.
HC1 Boiler 1.1
Heating limit
Room temp. switch diff.
Pump
Frost protection
Room temp. switch diff.
1ºC
Overrun time
Overrun speed
Maximum speed
Overrun time
10 secs
Pump
Overrun time
Overrun speed
Maximum speed
Overrun speed
70%
CONTINUED OVERLEAF
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Pump
Overrun speed
Maximum speed
Maximum speed
v. Frost Protection - The heating
circuit frost protection can be set
to be triggered on a number of
temperature sources if congured.
HC1 Boiler 1.1
Pump
Frost protection
100%
Frost Protection
Flow temperature
Outside temperature
Room temperature
Frost Protection
Temperature
Hysteresis
Temperature
5ºC
Hysteresis
15ºC
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Frost protection
Flow temperature
Outside temperature
Room temperature
Temperature
6ºC
Outside temperature
Temperature
Hysteresis
Temperature
0ºC
Hysteresis
5ºC
Frost protection
Outside temperature
Room temperature
Room temperature
Temperature
Hysteresis
Hysteresis
2ºC
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e. Time clock
Each heating circuit can be
programmed to a specic time clock
with three periods per day, single
days individually Monday through to
Sunday, or multiple days Monday to
Friday or Saturday and Sunday
Single / Multiple.....e.g.:
Heating circuits
Settings
Time clock
Holiday programme
f. Holiday programme
Each heating circuit can have up
to 8 holiday periods which are
programmed between start and end
dates.....e.g.:
Heating circuits
Time clock
Holiday programme
Holiday programme
Time clock
HC1 Boiler 1.1
HC2 Boiler 1.2
Time clock
Single day
Multiple days
Single day
Monday
Period1: 06:00-22:00
Period2: 00:00-00:00
Period3: 00:00-00:00
HC1 Boiler 1.1
HC2 Boiler 1.2
Holidays
Period 1
Start: 01/01/2014
End: 01/01/2014
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2. DHW Circuits
Menu
Heating circuits
DHW
The DHW circuit when congured has the following settings:
a. Operating mode selection:
The DHW circuit can be set to any
of the following:
DHW
Status
Operating mode
Tank temperature
Settings
Operating mode
DHW1 Boiler 1
DHW1 Boiler 1
Standby
b. Tank temperature
A temperature can be set for each
DHW circuit for the following periods:
Day / Night / Holiday.....e.g.:
DHW
Operating mode
Tank temperature
Flow temperature
Tank temperature
DHW1 Boiler 1
DHW1 Boiler 1
Tank temp day
Tank temp night
Tank temp holiday
Tank temp day
65ºC
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d. Settings
Each DHW circuit has a number
of settings that can be congured.
Most settings are only accessible
at Installer access levels.
Day / Night / Holiday.....e.g.:
On/Off
One time boost
DHW
Tank temperature
Settings
Time clock
Holiday program
Settings
DHW1 Boiler 1
i. One time boost - One time boost
can be enabled and hot water
tank will be charged to set a
temperature at any required time.
DHW1 Boiler 1
One time boost
Primary pump
Legionalla
One time boost
On/Off
Temperature
On/Off
One time boost
One time boost
On/Off
Temperature
Temperture
60ºC
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ii. Primary pump - This is where the
pump control parameters for the
Hot Water Tank primary charge
pump may be set..
DHW1 Boiler 1
One time boost
Primary pump
Legionalla
Frost Protection
Primary pump
Overrun speed
Minimum speed
Maximum speed
Minimum speed
Primary pump
Overrun time
Overrun speed
Minimum speed
Overrun time
10secs
Primary pump
Overrun time
Overrun speed
Minimum speed
Maximum speed
Overrun speed
50%
10%
Primary pump
Minimum speed
Maximum speed
Maximum pseed
100%
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iii. Legionella - The legionella
functionality can be set to either a
xed weekday or a time interval.
The temperature can also be set.
DHW1 Boiler 1
Primary pump
Legionella
Frost prtoection
None /Weekday /Interval
LegionellaPrimary pump
Operation mode
Temperture
Interval
Legionella
Operation mode
Temperture
Interval
Temperature
65ºC
Interval
7day(s)
iv. Frost Protection - The minimum
flow temperature for a frost
protection demand can be set.
Frost protection
DHW minimum ow
DHW minimum ow
8ºC
Temperture
Interval
Legionella
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d. Time clock
Each DHW circuit can be
programmed to a specic time clock
with three periods per day, single
days individually Monday through to
Sunday, or multiple days Monday to
Friday or Saturday and Sunday
Single / Multiple.....e.g.:
DHW circuits
Settings
Time clock
Holiday programme
e. Holiday programme
Each DHW circuit can have up
to 8 holiday periods which are
programmed between start and end
dates.....e.g.:
DHW circuits
Time clock
Holiday programme
Holiday programme
Time clock
HC1 Boiler 1.1
HC2 Boiler 1.2
Time clock
Single day
Multiple days
Single day
Monday
Period1: 06:00-22:00
Period2: 00:00-00:00
Period3: 00:00-00:00
HC1 Boiler 1.1
HC2 Boiler 1.2
Holidays
Period 1
Start: 01/01/2014
End: 01/01/2014
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3. INSTALLER CONNECTIONS
Mains Voltage/230V 50Hz
I1 I2 I3 I4
1 2 3 1 2 3 4 1 2 1 2
L N PE SL1 L SL2 L ~ ~
Mains Supply
Demand inputs
230V 50Hz
Interlock
Volts Free Contacts
I5 I6
1 2 3 4 5 6 1 2 3 4
C
NO PE C
MFR1 MFR2 MFR3
CNO PE NO
NO
C
MFR4
L
230V 50Hz
Auxiliary
KEY
l1 Mains Supply Connector, 230V
50Hz. Live, Neutral, PE.
l2 Demand inputs, Multifunctional,
230V 50Hz. Typical setting:
SL1, Heating Circuit 1
SL2, Heating Circuit 2/DHW
l3 Optional Interlock input, 230V
50Hz
N
l4 Auxiliary Mains Supply Output,
230V 50Hz. Live, Neutral.
Internal Pump Power Connection.
KEY
I5 Multifunction Volts Free Relay
Outputs, 24V DC to 230V 50Hz.
Typical setting:
MFR1 Heating Circuit 1 Pump
MFR2 DHW Circuit Pump
Internal Pump PE Connection.
I6 MFR3 Burner On Indication
MFR4 Boiler Fault Indication
PELV
I7 I8 I9 I10
1 2 1 2 3 1 2 3 4 5 6 1 2 3 4 5 6 7 8
PELV
Interlock 0-10VPump control OpenTherm Header
KEY
PELV Only
I7 Optional Interlock input.
I8 N/A
I9 Boiler Control:
0-10V Capacity or Temperature.
OpenTherm Interface 1. Boiler, Heating Circuit 1 and/or
DHW Circuit Control.
OpenTherm Interface 2. Heating Circuit 2 Control.
I10 Optional Sensors:
Header Sensor for Cascade Control.
DHW Tank Temperature or Heating Circuit 2 Room
Temperature.
Heating Circuit 1 Room Temperature.
Outside Temperature Sensor for Heating Curve.
S1 GND S2 GND S3 GND S4 GNDOT1+ OT1- OT2+ OT2-PWM GND 10V 10V GNDI0 I1
DHW Tank /
Room 2 Room 1
Outside
Temp.
*Note: The items grayed out are not standard and are connections provided by the relevant option kits.
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4. FAULTS
When a fault occurs the title bar of the status
display will alternate between:
KESTON HEAT 2 55kW
Operation: Htg. with temp.
Flow Set point: 40.2ºC
Flow temp: 40.2ºC
Operation: Htg. with temp.
Flow Set point: 40.2ºC
Flow temp: 40.2ºC
Using the scroll knob the detail of the fault
can be displayed. e.g.:
Fault 39
Blocking Interlock
Function activated
(controlled shutdown)
The fault once rectied can now be reset by
pressing the reset button whilst in this display.
If there are multiple faults then a list of faults
will be shown. e.g.:
Faults
Fault 39
Fault 01
Fault 23
Each fault may be highlighted and selected
to show the detail as above
Fault
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BOILER FAULTS
ERROR TYPE
(Warning,
Blocking,
Lockout)
HARDWARE (THERMISTORS, ACTUATORS)
B Flow thermistor open circuit (blocking) 1
B Flow thermistor short circuit (blocking) 2
B Return thermistor open circuit (blocking) 3
B / W Return thermistor short circuit (blocking) 4
B / W Flue thermistor open circuit (blocking) 5
B Flue thermistor short circuit (blocking) 6
W DHW thermistor open circuit 7
W DHW thermistor short circuit 8
W Outside thermistor defect (open / short) 9
B Water pressure sensor defect 10
L Flow thermistor open circuit (lockout after 24h) 11
L Flow thermistor short circuit (lockout after 24h) 12
L Return thermistor open circuit (lockout after 24h) 13
L Return thermistor short circuit (lockout after 24h) 14
L Flue thermistor open circuit (lockout after 24h) 15
L Flue thermistor short circuit (lockout after 24h) 16
L Heat thermistor open circuit (lockout after 24h) 17
L Heat thermistor short circuit (lockout after 24h) 18
B Heat thermistor open circuit (blocking) 19
B Heat thermistor short circuit (blocking) 20
W Header thermistor open circuit 21
W Header thermistor short circuit 22
W Room (hc1) thermistor open circuit 23
W Room (hc1) thermistor short circuit 24
DESCRIPTION
ERROR CODE
(OpenTherm)
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ERROR TYPE
(Warning,
Blocking,
Lockout)
TEMPERATURE SUPERVISIONS
B Blocking due to ow overheat 30
B Blocking due to return overheat 31
B Blocking due to ue overheat 32
B Flow & return reversed 33
B Thermistor pipe t supervision active (blocking) 34
L Thermistor pipe t supervision (lockout) 35
B Flow gradient supervision 36
B Flue gradient supervision (reserved) 37
B Blocking delta temp ow/return 38
L Lockout ow overheat 39
L Lockout return overheat 40
L
B Blocking due to heat exchanger overheat 42
Lockout ue overheat (ue thermistor)
Lockout thermal fuse (thermal fuse)
DESCRIPTION
ERROR CODE
(OpenTherm)
41
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ERROR TYPE
(Warning,
Blocking,
Lockout)
SYSTEM (FLAME, FAN, HYDRAULIC, ETC.)
B Blocking due to no CH water ow 50
B Low water pressure 51
W No ame signal at start (restart) 52
W
L
W Flameloss during stabilisation => restart attempts 55
L
L False ame (with heat demand) 57
L No ame after restarts 58
B/L Fan speed, stand still check 59
L
B/L Error fan speed during pre-purge (5* restarts => lockout ) 61
W
W Warning due to mains overvoltage 63
B Blocking due to mains undervoltage 64
W
L Too many remote resets 66
B No water ow indication 67
B PWM pump blocking error (feedback 90%) 68
B PWM pump electrical error (feedback 85%) 69
B HX water ow fault (feedback < min ow rate) 70
B PWM pump dry run error (feedback 80%) 71
B Warning code from pump (feedback 75%) 72
Flameloss during operation => endless restarts
(Parameter “endless restarts” activated)
Flameloss during operation,
=> Lockout after restarts attempts are used
(Parameter “endless restarts” deactivated)
Flameloss during stabilisation
=> Lockout after restarts attempt are used
Fan speed not achieved, e.g. Pre-purge-test, post-purgetest etc.
Error min/max supervision fan speed during operation
(restart)
Opentherm plus error (communication faulty; no connection
anymore , etc)
DESCRIPTION
ERROR CODE
(OpenTherm)
53
54
56
60
62
65
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ERROR TYPE
(Warning,
Blocking,
Lockout)
SYSTEM (FLAME, FAN, HYDRAULIC, ETC.) - CONT
W VariCAN Error 73
B Safety Interlock Function activated (controlled shutdown) 74
L Air Pressure Switch error 75
W Air Pressure Switch warning (restart) 76
B
B/L Min water ow rate 78
W Maximum water ow rate exceeded 79
W Quartz crystal error 80
B 0-10V Input out of range 81
L Retails supervision error (COM-, Valve-Retails) 93
L Request for re-update 94
B Blocking due to programming mode 95
L Lockout parameter mismatch 96
L Lockout parameter set 97
B/L Internal blocking error 98
L System lockout (internal lockout error) 99
High water pressure
INTERNAL SYSTEM
DESCRIPTION
ERROR CODE
(OpenTherm)
77
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5. GENERAL INFORMATION
TO SHUT DOWN THE BOILER
Note. The inbuilt frost protection for the boiler
will not function if there is no mains supply
to the boiler.
1. For short periods
Set the external controls to OFF. Wait 4
minutes and then isolate the mains supply
to the boiler.
2. For longer periods
Set the external controls to OFF. Switch
the electricity supply to OFF. For longer
periods the entire system should be drained,
including the domestic hot water supply.
TO RELIGHT THE BOILER
Refill the system if it has been drained,
taking care to ensure no air is in the boiler
or system.
Repeat the procedure detailed in ‘To light
the boiler’.
FROST PROTECTION
The KESTON HEAT2 boiler has built into its
control system the facility to protect the boiler
only against freezing.
Note. This may not protect remote parts of
the system, in which case a separate frost
thermostat should be tted.
BOILER OVERHEAT THERMOSTAT
Boiler overheating is detected by electrical
sensors connected to the boiler control
module. If the boiler overheats it will shut
down and the display will show Overheat
Lockout. Press the reset button and the
boiler will relight. If the fault recurs turn off
the boiler and consult a suitably qualied
Gas Safe registered engineer or in IE a
competent person.
CONDENSATE DRAIN
This appliance is fitted with a siphonic
condensate trap system that reduces the risk
of the appliance condensate from freezing.
However should the condensate pipe to
this appliance freeze, please follow these
instructions:
a. If you do not feel competent to carry out
the defrosting instructions below please call
your local Gas Safe Registered installer for
assistance.
If you do feel competent to carry out the
b.
following instructions please do so with care
when handling hot utensils. Do not attempt to
thaw pipework above ground level.
If this appliance develops a blockage in its
condensate pipe, its condensate will build
up to a point where it will make a gurgling
noise prior to locking out displaying “Ignition
Lockout” on the display. If the appliance is
reset it will make a gurgling noise prior to it
locking out displaying “Ignition Lockout” on
the display.
To unblock a frozen condensate pipe;
1. Follow the routing of the plastic pipe from
its exit point on the appliance, through its
route to its termination point.
Locate the frozen blockage. It is likely that
the pipe is frozen at the most exposed point
external to the building or where there is
some obstruction to ow. This could be at
the open end of the pipe, at a bend or elbow,
or where there is a dip in the pipe in which
condensate can collect. The location of the
blockage should be identied as closely as
possible before taking further action.
2. Apply a hot water bottle, microwaveable
heat pack or a warm damp cloth to the frozen
blockage area. Several applications may
have to be made before it fully defrosts.
Warm water can also be poured onto the
pipe from a watering can or similar. DO NOT
use boiling water .
3. Caution when using warm water as
this may freeze and cause other localised
hazards.
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4. Once the blockage is removed and
the condensate can ow freely, reset the
appliance. (Refer to “To Light the boiler”)
5. If the appliance fails to ignite, call your
Gas Safe Registered engineer.
Preventative solutions:
During cold weather, set the boiler stat to
maximum. (Must return to original setting
once cold spell is over).
Place the heating on continuous and turn
the room stat down to 15ºC overnight or
when unoccupied. (Return to normal after
cold spell).
ESCAPE OF GAS
Should a gas leak or fault be suspected
contact your local gas supplier without
delay.
Do NOT search for gas leaks with a
naked ame.
CLEANING
For normal cleaning simply dust with a
dry cloth.
To remove stubborn marks and stains use
a damp cloth and mild detergent.
DO NOT use abrasive cleaning materials.
27
Page 28
INSTALLER TO RECORD THE FOLLOWING INFORMATION
SYSTEM SET UP INFORMATION
Primary / Secondary:
Boiler Number:
Hydraulic Circuit No:
Plant Conguration:
Local Heating Circuit Conguration:
Local DHW Circuit Confgiuration:
FM 59915
Manufactured under
an ISO 9001
registered quality
Technical Training
Our Expert Academy offer a range of training options designed and delivered by our
experts in Heating.
For details please contact:
www.expert-academy.co.uk
Ideal Boilers Ltd., pursues a policy of continuing improvement in the design and
performance of its products.
The right is therefore reserved to vary specication without notice.
management system
Ideal Boilers Ltd., National Avenue, Hull, East Yorkshire, HU5 4JB
Registered Ofce
Tel 01482 492251 Fax 01482 448858
Registration No. London 322 137
Keston by Ideal Heating Helpline: 01482 443005
Ideal Heating Parts: 01482 498665
www.keston.co.uk
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