IDEAL LOGIC+ SYSTEM2 S15, Installation & Servicing, Page: 33 / 72

33 Installation and Servicing
Section 2 - Installation
INST
ALLA
TION
WATER CIRCULATION SYSTEM
1. With the system cold, check that the initial pressure is
correct to the system design requirements.
For pre-pressurised systems, this should be 1.0 bar.
2. With the system hot, examine all water connections for
soundness. The system pressure will increase with
temperature rise but should not exceed 2.5 bar.
3. With the system still hot, turn off the gas, water and
electricity supplies to the boiler and drain down to
complete the flushing process.
Note . A flushing solution should be used during the flushing
procedure. Flushing solutions: Fernox Superfloc, Sentinel
X300 (new systems) or X400 (existing systems).
4. Refill and vent the system, add inhibitor, clear all air
locks and again check for water soundness.
Refer to Section
1.17
5. Reset the system initial pressure to the design
requirement.
6. Balance the system.
Refer to Section
1.16
7. Check the condensate drain for leaks and check that it is
discharging correctly.
8. Finally, set the controls to the User’s requirements.
The pump will operate briefly as a self-check once every 24
hours in the absence of any system demand.
2.30 GENERAL CHECKS
CENTRAL HEATING (CH) MODE
1. Ensure that the CH external controls are calling for heat
and the DHW external controls are not. The display
should show:-
2. Gas Rate
Check the boiler gas rate when the boiler is at maximum
output.
Check at the gas meter, with no other appliance in use.
Refer to Table 2.
3. Set the central heating external controls to OFF.
The burner should go off.
The display should show:-
4. Check the correct operation of the timer (if fitted) and all
other system controls. Operate each control separately
and check that the main burner responds.
Make the following checks for correct operation in:
Refer to Section
1.17
Target 60°C
Timer or Cylinder
Thermostat Off
Menu Mode
On at 60°C
Radiator Target 60°C
Set by Outside
Sensor
Ready
Target 60°C
Menu Mode
On at 60°C
Target 60°C
Menu Mode
Ready
Timer Off or Room Thermostat & Cylinder
Thermostat Off
Target 60°C
Timer or Cylinder
Thermostat Off
Menu Mode
Ready
Radiator Target
60°C
Room Thermostat or
Timer Off
Ready
TEMPERATURE
SETTING
(No Outside Sensor)
Temperature can be
selected using the
temperature knob (B).
Knob Flow
Setting Temp (°C)
Max 80
Min 30
TEMPERATURE
SETTING
(With Outside Sensor)
DHW Cylinder Flow
Temperature is factory
set to 80°C.
Nominal room
temperature can be
selected using the
temperature knob (B).
CH Flow Temperature is
automatically adjusted to
give the desired nominal
room temperature.
Knob Flow
Setting Temp (°C)
Max 30
Min 10
(No Outside Sensor)
(With Outside Sensor)
(No Outside Sensor)
(With Outside Sensor)