Initial Lighting - IDEAL isar HE24 Installation And Servicing

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43 INITIAL LIGHTING

LEGEND
A. Boiler On/Off switch.
B. CH thermostat knob.
D. Burner On neon.
E. Reset button.
F . Injector pressure test
point.
G. Inlet pressure test point.
H. Gas service cock.
J. Casing pressure test point.
K. Overheat thermostat.
M. Control thermistor (flow).
1. Check that the system has been filled and that the boiler is
not airlocked. Ensure the automatic air vent cap (N) is open.
Note.
It is important the burner is not operated before the system is
fully vented of air. If it is necessary to operate the appliance
pump to assist venting of the air this must be done with the
gas service cock turned off.
2. Refit the boiler sealing panel. Refer to Frame 50.
3. Check that all the drain cocks are closed and that the CH
and DHW isolating valves (T, W and S) are OPEN.
4. Check that the electrical supply is OFF.
5. Check that the boiler on/off switch (A) is off.
6. Carefully align the user control and push gently into place.
Secure with the single screw located underneath.
7. Check that the gas service cock (H) is OPEN.
8. Slacken the screw in the inlet pressure test point (G) and
connect a gas pressure gauge via a flexible tube.
9. Swing the control box to the working position and secure
with the clamp.
10. Connect the low voltage electrical lead from the user control
to the control box (refer to Frame 51).
11. Screw the control into position.
12. Switch the electricity supply ON and check all external controls
are calling for heat.
13. CENTRAL HEATING
Set the boiler thermostat knob (B) to position 6 and switch
the boiler on/off switch (A) to ON. The boiler control should
now go through its ignition sequence until the burner is
established.
isar -
Installation and Servicing
INSTALLATION
N. Automatic air vent.
P . Control box (Servicing
position).
R. Pressure gauge.
S. CH Flow isolating valve.
T. CH Return isolating valve.
U. DHW outlet.
W. DHW inlet
Y . DHW thermostat knob.
Z. Spark generator.
14. If the boiler does not light after 3 attempts the fault code
will be displayed, Press the reset button (E) and the
boiler will repeat its ignition sequence.
When the burner is established the WHITE 'Burner On'
neon (D) will be illuminated, the LED display will show
status c.
The display
The user control has one neon and one display to inform the
user about the status. The display will show the status of the
boiler. The neon will show the status of the flame. If no flame is
detected the neon is blinking. When the flame is detected the
neon will be lit permanently.
Below is a list with display function in normal operation.
Standby, no demand for heat present.
Boiler is active for central heating.
Boiler is active for domestic hot water.
Boiler is heating up the plate heat exchanger.
Boiler is in lockout for a specific error. Display will be
blinking, alternating with a number or letter to show which
error is detected.
Boiler is in lockout for a specific error. Display will be
blinking, 0 alternating with a number or letter to show
which error is detected.
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