IDEAL LOGIC+ Combi 24 User manual

USERS GUIDE
LOGIC+ Combi
24, 30, 35
When replacing any part on this appliance, use only spare parts that you can be
assured conform to the safety and performance specification that we require.
Do not use reconditioned or copy parts that have not been clearly authorised by Ideal.

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Destination Countries: GB, IE
IDEAL LIDEAL L
IDEAL LIDEAL L
IDEAL LOGIC + COMBIOGIC + COMBI
OGIC + COMBIOGIC + COMBI
OGIC + COMBI
24, 30, 35
(Natural Gas Only)
24 G.C. Appliance No. 47-348-65
30 G.C. Appliance No. 47-348-66
35 G.C. Appliance No. 47-348-67
THE BENCHMARK SERVICE INTERVAL RECORD MUST BE COMPLETED AFTER EACH SERVICE
Ideal Stelrad Group is a member of the Benchmark scheme and fully supports the aims of the
programme. Benchmark has been introduced 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.

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INTRODUCTION
The Logic + Combi is a wall mounted, room sealed, condensing combination boiler, featuring full sequence automatic spark
ignition and fan assisted combustion.
Due to the high efficiency of the boiler, condensate is produced from the flue gases and this is drained to a suitable disposal
point through a plastic waste pipe at the base of the boiler. A condensate 'plume' will also be visible at the flue terminal.
The Logic + Combi is a combination boiler providing both central heating and instantaneous domestic hot water.
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 by a Gas Safe Registered Engineer, in
accordance with the above regulations.
In IE, the installation must be carried out by a Registered Gas Installer (RGII) 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.
It is essential that the instructions in this booklet are strictly followed, for safe and economical operation of the boiler.
FOR ANY QUERIES PLEASE RING THE
IDEAL CONSUMER HELPLINE : 01482 498660
NOTE. BOILER RESET PROCEDURE -
To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting.
The boiler will repeat the ignition sequence.

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ELECTRICITY SUPPLY
This appliance must be earthed.
Supply: 230 V ~ 50 Hz. The fusing should be 3A.
Important Notes
• This appliance must not be operated without the casing correctly fitted and forming an adequate seal.
• If the boiler is installed in a compartment then the compartment MUST NOT be used for storage purposes.
• 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 Gas Safe Registered Engineer or in IE a Registered Gas Installer (RGII).
• Under NO circumstances should any of the sealed components on this appliance be used incorrectly or tampered with.
• This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities,
or lack of experience and knowledge, unless they have been given supervision or instructions concerning use of the
appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
In cases of repeated or continuous shutdown a Gas Safe Registered Engineer or in IE a Registered Gas Installer (RGII)
should be called to investigate and rectify the condition causing this and carry out an operational test. Only the manufacturers
original parts should be used for replacement.
MINIMUM CLEARANCES
Clearances of 165mm (6 1/2") above, 100mm (4") below, 2.5mm (1/8") at the sides and 450mm (17 3/4") at the front of the
boiler casing must be allowed for servicing.
Bottom clearance
Bottom clearance after installation can be reduced to 5mm.
This must be obtained with an easily removable panel, to enable the consumer to view the system pressure gauge, and to
provide the 100mm clearance required for servicing.

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A. Pre-heat On/off
B. DHW temperature control
C. CH temperature control
D. Mode Control
E. Boiler Status
BOILER CONTROLS
F. Burner ‘on’ indicator
G. Pressure Gauge
H. Condensate Drain
J. Economy Mode
LEGEND
A B E F C J D
G
H

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TO LIGHT THE BOILER. (REFER TO BOILER CONTROLS)
If a programmer is fitted refer to separate instructions for the programmer before continuing.
1. Check that the electricity supply to the boiler is off.
2. Set the mains Off/Summer/Winter control (D) to ‘Off’.
3. Set the Domestic Hot Water temperature control (B) and Central Heating temperature control (C) to ‘max’.
4. Set the preheat control (A) to ‘on’.
5. Ensure that all hot water taps are turned off.
6. Switch ON electricity to the boiler and check that all external controls, e.g. programmer and room thermostat, are ON.
7. Set the Off/Summer/Winter control to winter ( ).
The boiler will commence the ignition sequence supplying heat to the central heating, if required.
Note. In normal operation the boiler status display (E) will display messages (see pages 14 & 15).
Boiler frost protection - boiler will fire if temperature is less than 5 degrees C.
During normal operation the burner on indicator (F) will remain illuminated when the burner is lit.
Note: If the boiler fails to light after five attempts the following fault messages will be displayed “Ignition Lockout” -
“1 Check other gas appliances” - “2 Reset boiler” - “3 Contact Installer”.
To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting.The boiler will repeat the
ignition sequence. If the boiler still fails to light consult a Registered Gas Installer or in IE a Registered Gas Installer (RGII).

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OPERATION
Winter Mode - i.e. CH and DHW required.
Ensure the off/summer/winter control (D) is set to winter ( )
The boiler will fire and supply heat to the radiators but will give priority to DHW on demand.
The DHW preheat will operate as described under 'Summer conditions' during periods when there is no call for CH.
Summer Mode - i.e. DHW only required.
Set the mode knob control to Summer ( ).
Set the CH external controls to OFF.
Preheat will operate with the preheat switch (A) set to ON.
The boiler will fire periodically for a few seconds to maintain the DHW calorifier in a pre-heated condition. The average time
period between firing is 90 minutes. This may vary considerably due to the surrounding ambient temperature of the boiler.
The boiler will fire whenever there is a demand for DHW.
The boiler preheat facility can be immobilised by turning the preheat switch (A) to OFF. This will stop the boiler operating for
short periods. This facility is primarily provided for boiler installations in a sensitive area (i.e. bedroom etc.).
Note. If the pump and diverter valve have not operated in the last 24 hours they will run briefly to ensure they do not become
seized.
CONTROL OF WATER TEMPERATURE
Domestic Hot Water
The DHW temperature is limited by the boiler controls to 64oC maximum at low draw-off rate, adjustable via the DHW
temperature control (B).
Due to system variations and seasonal temperature fluctuations DHW flow rates/temperature rise will vary, requiring adjustment
at the draw off tap : the lower the rate the higher the temperature, and vice versa.

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Central Heating
The boiler controls the central heating radiator temperature to a maximum of 80oC, adjustable via the CH temperature control (C).
The Logic + Combi is a high efficiency combination boiler which is most efficient when operating in condensing mode.
The boiler will operate in this mode if the CH temperature control (C) is set to the ‘e’ position (economy mode) or below. This
control should be set to a maximum for very cold periods.
TO SHUT DOWN THE BOILER
Set the mode knob control to OFF.
TO RELIGHT THE BOILER
Repeat the procedure detailed in 'To light the boiler'.
FROST PROTECTION
If no frost protection is provided and frost is likely during a short absence from home, leave the heating controls (if fitted) at
a reduced temperature setting. For longer periods, the entire system should be drained.
If the system includes a frost thermostat then the timer can be left off (if fitted). The mains supply should be left switched ON,
with the boiler thermostat left in the normal running position.
BOILER OVERHEAT PROTECTION
The boiler controls will shut down the boiler in the event of overheating. Should this occur, a fault code “Overheat Lockout”
- “1 Fill system to 1.0 bar” - “2 Bleed radiators” - “3 Check radiator valves open” - 4 Reset boiler” - “5
Contact Installer” will be displayed.
Reset boiler by turning the mode control knob (D) to reset position and immediately turn knob back to required setting. The
boiler will relight. If the fault recurs, turn off the boiler and consult a Gas Safe Registered Engineer or in IE a Registered Gas
Installer (RGII).
Approx. flow temperatures for the boiler thermostat settings are:
Knob Setting Flow Temperature
Minimum 40oC(104oF)
Maximum 64oC(147oF)

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LOSS OF SYSTEM WATER PRESSURE
The gauge (G) indicates the central heating system pressure.
If the pressure is seen to fall below the original installation
pressure of 1-2 bar over a period of time then a water leak
may be indicated. In this event conduct the re-pressurising
procedure as shown below. If unable to do so or if the pressure
continues to drop a Gas Safe Registered Engineer or in IE a
Registered Gas Installer (RGII) should be consulted.
THE BOILER WILL NOT OPERATE IF THE PRESSURE HAS
REDUCED TO LESS THAN 0.3 BAR UNDER THIS
CONDITION.
In this case the boiler will display “Low water pressure” -
“1 fill system to 1.0 bar” - “2 Bleed radiators” -
“3 Contact installer”.
To re-pressurise:
1. Ensure filling loop isolation valves are closed.
2. Remove the left hand cap.
3. Attach on the filling loop.
4. Turn the filling loop isolation valves to the open position.
The system will now fill.
5. Wait for pressure gauge to reach 1 to 1.5 bar.
6. Close the filling loop isolation valves.
7. Disconnect the filling loop at left hand side and angle
upwards.
8. Replace cap.
2
3
1
3G9866
6
CLOSED
POSITION
CLOSED
POSITION
OPEN
POSITION
4
5
PRESSURE GAUGE
7
8

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CONDENSATE DRAIN
The condensate drain (H) must not be modified or blocked.
Blockage of the condensate drain, caused by debris or freezing, can cause automatic shutdown of the boiler.
If freezing is suspected and the pipe run is accessible an attempt may be made to free the obstruction by pouring hot water
over the exposed pipe and clearing any blockage from the end of the pipe. If this fails to remedy the problem the assistance
of a Gas Safe Registered Engineer or in IE a Registered Gas Installer (RGII) should be sought.
ESCAPE OF GAS
Should a gas leak or fault be suspected contact the National Gas Emergency Service without delay.
Telephone [phone]
DO NOT SEARCH FOR GAS LEAKS WITH A NAKED FLAME.
CLEANING
For normal cleaning simply dust with a dry cloth. To remove stubborn marks and stains, wipe with a damp cloth and finish
off with a dry cloth. DO NOT use abrasive cleaning materials.
MAINTENANCE
The appliance should be serviced at least once a year by a Gas Safe Registered Engineer or in IE a Registered Gas
Installer (RGII).

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POINTS FOR THE BOILER USER
Note. In line with our current warranty policy we would ask that you check through the following guide to identify any
problems external to the boiler prior to requesting a service engineers visit. Should the problem be found to be other
than with the appliance we reserve the right to levy a charge for the visit, or for any pre-arranged visit where access
is not gained by the engineer.

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YES
NO HOT WATER
Check the mains switch (fused
spur) is turned on and ensure
mode control knob (D) is in the
summer or winter position
Is water coming out of the hot
water tap when turned on?
NO CENTRAL HEATING
Check the mains switch (fused
spur) is turned on and ensure
mode control knob (D) is in the
winter position
Does the boiler operate and
provide central heating?
Check the time settings on the
programmer are as you require
and adjust if necessary
Check the programmer (internal
or external to the boiler) is in an
“ON” position and the room
thermostat is turned up
NO HOT WATER OR
CENTRAL HEATING
Check the fused spur is turned
on and ensure mode control
knob (D) is in the winter position
See boiler “Display Funcitons”
section
Does the boiler have a display
showing on the front control
panel?
See boiler “Display Functions”
section. If “standby mode” is
displayed then contact Ideal
Customer Services Helpline if
your appliance is under warranty
or a Gas Safe Registered
Engineer, in IE a Registered Gas
Installer (RGII), if out of warranty
YES
NO
Contact a Gas Safe Registered
Engineer or in IE a Registered
Gas Installer (RGII)
TROUBLESHOOTING
Contact a Gas Safe Registered
Engineer or in IE a Registered
Gas Installer (RGII)
See boiler “Display Functions”
section. If “standby mode” is
displayed then contact a Gas Safe
Registered Engineer or in IE a
Registered Gas Installer (RGII)
NO
YES
NO

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NORMAL OPERATION MESSAGE 1 MESSAGE 2 MESSAGE 3
Mode knob in standby (off) position and
no heat demand
Standby mode For hot water turn mode
knob clockwise
For central heating turn
mode knob clockwise twice
Mode knob in summer ( ) position and
no heat demand
Summer mode For central heating turn
mode knob clockwise
Mode knob in winter ( ) position and
no heat demand
Winter mode Timer or room stat off
Domestic hot water operation Hot water Temperature 64ºC High efficiency
Central heating operation Radiator Temp 80ºC High efficiency
Pre-heat operation Pre heat
Central heating
Temperature 59ºC High efficiency
Boiler frost protection Boiler frost protection Temperature 5ºC
Pump overrun Pump overrun
Fan post-purge Fan post-purge
High efficiency
Note. High efficiency will not be shown for central heating operation if the central heating flow temperature knob (c) is set to greater than 73ºC.
3G9711b
DISPLAY FUNCTIONS - NORMAL OPERATION MODE
Note. The temperatures shown below are for illustration purposes only. The measured temperatures will be shown on the boiler.
The display scrolls through a maximum of 3 messages under any operational condition, as shown below.

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NORMAL OPERATION MESSAGE 1 MESSAGE 2 MESSAGE 3
Pre-heat knob moved to off position Pre heat off
Pre-heat knob moved to on position Pre heat on
DHW temperature knob moved 64ºC DHW temp Hot water
temperature 64ºC
CH temperature knob moved 80ºC CH temp Maximum radiator
temperature 80ºC
May not be achieved for
high flow rates in winter
Mode knob moved to standby (off) position Central heating off Hot water off
Mode knob moved to summer ( ) position Summer mode
Standby mode
Central heating off Hot water on
Mode knob moved to winter ( ) position Winter mode Central heating on
Mode knob moved to reset position Reset
Hot water on
3G9712b
DISPLAY FUNCTIONS - SETTINGS CHANGED
Note. The temperatures shown below are for illustration purposes only. The measured temperatures will be shown on the boiler.

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DISPLAY FUNCTIONS - FAULT MESSAGES
BOILER DISPLAY MESSAGE DESCRIPTION ACTION
Outside Sensor Fault
Contact Installer
Outside Sensor Failure
3G9911
Reset the appliance - if the boiler fails to operate then please
contact Ideal (if under warranty) or alternatively a Gas Safe
Registered Engineer if outside of the warranty period. In IE
contact a Registered Gas Installer (RGII).
Low Mains Voltage
Contact Electricity Provider
Low Mains Voltage Contact a qualified electrician or your electricty provider.
PCB Fault
Contact Installer
Unconfigured PCB Unconfigured PCB. Please contact Ideal (if under warranty) or
alternatively a Gas Safe Registered Engineer if outside of the
warranty period. In IE contact a Registered Gas Installer
(RGII).
No Water Flow Thermistor Fault
Contact Installer
No Water Flow Thermistor Reset the appliance - if the boiler fails to operate then please
contact Ideal (if under warranty) or alternatively a Gas Safe
Registered Engineer if outside of the warranty period. In IE
contact a Registered Gas Installer (RGII).
Lockout 6
Contact Installer
False Flame Lockout Reset the appliance - if the boiler fails to operate then please
contact Ideal (if under warranty) or alternatively a Gas Safe
Registered Engineer if outside of the warranty period. In IE
contact a Registered Gas Installer (RGII).
Too Many Resets
Contact Installer
5 Boiler Resets in 15 Minutes 1. Turn power off and on at the fused spur.
2. If the boiler fails to operate please contact Ideal (if under
warranty) or alternatively a Gas Safe Registered Engineer if
outside of the warranty period. In IE contact a Registered Gas
Installer (RGII).
cont’d . . . . . . .

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DISPLAY FUNCTIONS - FAULT MESSAGES
cont’d . . . . . . .
BOILER DISPLAY MESSAGE DESCRIPTION ACTION
Boiler Type Card Fault
Contact Installer
BCC Activation Fault
3G9912
Reset the appliance - if the boiler fails to operate then please
contact Ideal (if under warranty) or alternatively a Gas Safe
Registered Engineer if outside of the warranty period. In IE
contact a Registered Gas Installer (RGII).
Low Water Pressure
1 Fill System to 1.0 Bar
2 Bleed Radiators
3 Contact Installer
Low Water Pressure Check system pressure is between 1 & 1.5bar on the pressure
gauge. If the fails to operate then please contact Ideal (if under
warranty) or alternatively a Gas Safe Registered Engineer if
outside of the warranty period. In IE contact a Registered Gas
Installer (RGII).
Check system pressure is between 1 & 1.5bar on the pressure
gauge. Reset the appliance. If the boiler fails to operate then
please contact Ideal (if under warranty) or alternatively a Gas
Safe Registered Engineer if outside of the warranty period. In
IE contact a Registered Gas Installer (RGII).
PCB Replacement
Reset Boiler
BCC Fault Reset the appliance - if the boiler fails to operate then please
contact Ideal (if under warranty) or alternatively a Gas Safe
Registered Engineer if outside of the warranty period. In IE
contact a Registered Gas Installer (RGII).
Overheat Lockout
1 Fill System to 1.0 Bar
2 Bleed Radiators
3 Check Radiator Valves Open
4 Reset Boiler
5 Contact Installer
Flow Temperature Overheat
No Water Flow Lockout
1 Fill System to 1.0 Bar
2 Bleed Radiators
3 Check Radiator Valves Open
4 Reset Boiler
5 Contact Installer
No Water Flow

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DISPLAY FUNCTIONS - FAULT MESSAGES
BOILER DISPLAY MESSAGE DESCRIPTION ACTION
Flame Loss
1
Check Other Gas Appliances Work
2 Contact Installer
Flame Loss
3G9913
1. Check other gas appliances in the house are working to
confirm a supply is present in the property.
2. If other appliances do not work or there are no other
appliances, check the gas supply is on at the meter and/or pre
payment meter has credit. If the boiler fails to operate then
please contact Ideal (if under warranty) or alternatively a Gas
Safe Registered Engineer if outside of the warranty period. In
IE contact a Registered Gas Installer (RGII).
Fan Fault
Contact Installer
Fan Fault Reset the appliance - if the boiler fails to operate then please
contact Ideal (if under warranty) or alternatively a Gas Safe
Registered Engineer if outside of the warranty period. In IE
contact a Registered Gas Installer (RGII).
Flow Thermistor Fault
Contact Installer
Flow Thermistor Reset the appliance - if the boiler fails to operate then please
contact Ideal (if under warranty) or alternatively a Gas Safe
Registered Engineer if outside of the warranty period. In IE
contact a Registered Gas Installer (RGII).
Return Thermistor Fault
Contact Installer
Return Thermistor Reset the appliance - if the boiler fails to operate then please
contact Ideal (if under warranty) or alternatively a Gas Safe
Registered Engineer if outside of the warranty period. In IE
contact a Registered Gas Installer (RGII).
Ignition Lockout
1 Check Other Gas Appliances Work
2 Reset Boiler
3 Contact Installer

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Ideal, P.O. Box 103, National Ave, Kingston Upon Hull, HU5 4JN. Tel. 01482
492251 Fax. [phone]. Registration No. London 322 137.
Ideal Stelrad Group pursues a policy of continuing improvement in the design and performance
of its products. The right is therefore reserved to vary specification without notice.
February 2010 UIN 204979 A03