Initial Lighting - IDEAL icos system HE15 Installation And Servicing

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42 INITIAL LIGHTING

LEGEND
A. Boiler On/Off switch.
B. 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. Flow thermistor.
N. Automatic air vent.
P. Control panel (Servicing position).
R. Pressure gauge.
S. Flow isolating valve.
T. Return isolating valve.
Z. Spark generator.
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 48.
3. Check that all the drain cocks are closed and that the
isolating valves (T and S) are OPEN.
4. Check that the electrical supply is OFF.
5. Check that the boiler on/off switch (A) is off.
6. Check that the gas service cock (H) is OPEN.
7. Carefully align the user control and push gently into place.
Secure with the single screw located underneath.
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 panel 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 49).
icos system -
Installation and Servicing
INSTALLATION
11. Screw the control into position.
12. Switch the electricity supply ON and check all external
controls are calling for heat.
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 the display function in normal operation.
Standby, no demand for heat present.
Boiler is active for central heating.
Boiler Frost Protection.
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 in lockout for a specific error. Display will be
blinking, alternating with a number or letter to show which
is detected.
Note: Boiler Frost Protection occurs under the following
condition:
1. If the temperature is less than 3 degrees the boiler
will fire.
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