Initial Lighting - IDEAL istor HE260 Installation And Servicing

48 INITIAL LIGHTING

LEGEND
A. Air vent.
B. Inlet pressure test point.
C. CH return isolating valve.
D. Mains water inlet isolating valve.
E. Gas service cock.
F . DHW outlet.
G . CH flow isolating valve.
H. Pressure gauge.
L. Display.
M. Select button.
O. Boiler On/Off switch.
1. Check that the system has been filled and that the boiler is
not airlocked. Ensure the automatic air vent cap (K) 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 56.
3. Check that the drain cock is closed and that the CH and
DHW isolating valves (D,C and G) are OPEN.
4. Check that the electrical supply is OFF.
5. Check that the boiler on/off switch (O) 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 (E) is OPEN.
8. Slacken the screw in the inlet pressure test point (B) and
connect a gas pressure gauge via a flexible tube.
9. Switch the electricity supply ON and check all external controls
are calling for heat.
10. CENTRAL HEATING
Switch the boiler on/off switch (O) to ON. The boiler control
should now go through its ignition sequence until the burner
is established.
11. If the boiler does not light after 3 attempts the fault code "LF"
will be displayed, Press the select button (M) and the boiler
will repeat its ignition sequence.
When the burner is established the flame 'Burner On' indicator
will be illuminated, the LCD display will show the radiator
status symbol.
DOMESTIC HOT WATER
12. With the boiler firing, set the DHW to ON and fully open a
DHW tap.
The boiler should continue to run and the LED display
should show status
13. Ensure that with the boiler operating the dynamic gas
pressure is able to obtain maximum output. Refer to Table 2.
For additional gas supply information refer to 'Gas Supply'
on page 9.
IMPORTANT
The gas input to the burner is regulated by the gas valve
according to the air flow produced by the fan. It is NOT
user-adjustable. Any interference to sealed settings on
the gas valve will adversely affect operation and render
our warranty void.
40
INSTALLATION
Tube
.
14. Turn off the DHW tap.
15. Set the boiler on/off switch (O) to OFF.
16. Remove the pressure gauge and tube. Tighten the
sealing screw in the pressure test point. Ensure a gas
tight seal is made.
17. Fit the boiler front and bottom panels.
The itime programmer display
The LCD display has a number of indicators to show the
operation of the boiler. In stand-by mode there are no
additional indicators other than the time of day. Each
channel, CH and DHW, status is shown as OFF, ON,
TIMED or ADVANCE (see users guide). In a timed on
period the status of the boiler is:
Radiator symbol indicates CH demand.
Tap symbol indicates DHW or preheat demand.
Flame symbol indicates burner status.
In error conditions the following indicates the error:
Blocking error is proceeded by "H" on the LCD display.
Locking out error is proceeded by a "L" on the LCD
display.
istor system store -
time
-
prog prog select select P R O G R A M M E R +
time
-
prog prog select select +
P R O G R A M M E R
M
ist9892
Installation and Servicing