Boiler Operation; To Start The Boiler; Control Of Water Temperature; Efficient Heating System Operation - IDEAL Logic+ SYSTEM 15 User Manual

2.

boileR oPeRAtion

leGend
A. Central Heating Temperature Knob
B. Mode Knob
C. Boiler Status
D. Burner 'on' Indicator
E. Central Heating Economy Setting
F. System Pressure Gauge

to StARt tHe boileR

If a programmer is fitted refer to separate instructions for the
programmer before continuing.
Start the boiler as follows:
1. Check that the electricity supply to boiler is off.
2. Set the mode knob (B) to 'boiler off'.
3. Set the Central Heating temperature knob (A) to 'max'.
4. Switch on electricity to the boiler and check that all external
controls, e.g. programmer, room thermostat and hot water
cylinder thermostat are on.
5. Set the mode knob (B) to 'boiler on'.
The boiler will commence ignition sequence, supplying heat to the
central heating, if required.
note. In normal operation the boiler status display (C) will show codes:
Standby - no demand for heat.
Central Heating being supplied
Boiler frost protection - boiler will fire if temperature is below 5ºC.
During normal operation the burner on indicator (D) will remain
illuminated when the burner is lit.
Note: If the boiler fails to light after five attempts the fault code
will be displayed (refer to Fault Code page).
to turn off
Set the mode knob (B) to 'boiler off'.

ContRol of WAteR teMPeRAtURe

The boiler controls the central heating radiator temperature to a
o
maximum of 80 C, adjustable via the central heating temperature
knob (A).
Approximate temperatures for central heating:
Central Heating Radiator Temperature (approx.)
Knob Setting
Minimum 45ºC (113ºF)
Maximum 80ºC (176ºF)
' refer to Efficient Heating System
For economy setting '
Operation.
Ideal Logic + System -
User's
A E C D
Boiler Base
F

effiCient HeAtinG SySteM oPeRAtion

The boiler is a high efficiency, condensing appliance which will
automatically adjust its output to match the demand for heat.
Therefore gas consumption is reduced as the heat demand is
reduced.
The boiler condenses water from the flue gases when
operating most efficiently. To operate your boiler efficiently
(using less gas) turn the central heating temperature knob
(A) to the ' ' position or lower. In winter periods it may be
necessary to turn the knob towards the 'max' position to meet
heating requirements. This will depend on the house and
radiators used.
Reducing the room thermostat setting by 1ºC can reduce gas
consumption by up to 10%.

WeAtHeR CoMPenSAtion

When the Weather Compensation option is fitted to the system
then the central heating temperature knob (A) becomes
a method of controlling room temperature. Turn the knob
clockwise to increase room temperature and anti-clockwise
to decrease room temperature. Once the desired setting has
been achieved, leave the knob in this position and the system
will automatically achieve the desired room temperature for all
outside weather conditions.

boileR fRoSt PRoteCtion

If the system includes a frost thermostat then, during cold
weather, the boiler should be turned OFF at the programmer
(if fitted) ONLY. The mains supply should be left switched ON,
with the boiler thermostat left in the normal running position.
If no system frost protection is provided and frost is likely
during a short absence from home it is recommended to leave
the heating controls (if fitted) at a reduced temperature setting.
For longer periods, the entire system should be drained.

boileR ReStARt

To restart the boiler, when directed in the listed fault codes
(see section 8), turn the mode knob (B) to 'restart' position and
IMMEDIATELY turn knob back to required setting. The boiler
will repeat its ignition sequence. If the boiler still fails to start
consult a Gas Safe Registered Engineer or in IE a Registered
Gas Installer (RGII).

MAinS PoWeR off

To remove all power to the boiler the mains power switch must
be turned off.
B
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