Initial Lighting - IDEAL HE15 Installation And Servicing

40 INITIAL LIghTINg

pLEAsE NOTE: The combustion for this appliance has
been checked, adjusted and preset at the factory for
operation on the gas type defined on the appliance data
plate. Do not adjust the air/gas ratio valve.
having checked:
• That the boiler has been installed in accordance with
these instructions.
• The integrity of the flue system and the flue seals.
• The integrity of the boiler combustion circuit and the
relevant seals.
1. Check that the system has been filled and that the
boiler is not air locked.
Note. It is important the burner is not operated before
the system is fully vented of air. If it is necessary to
operate the system pump to assist venting of the air
this must be done with the gas service cock turned off.
2. Check that all drain cocks are closed and any valves
in the flow and return are open.
3. Check the electrical supply is off.
4. Check the gas service cock is open.
5. Check that the boiler on/off switch (A) is OFF
6. Slacken the screw in the inlet pressure test point (G)
and connect a gas pressure gauge via a flexible tube.
7. Switch the electricity supply ON and check all external
controls are calling for heat.
8. Set the boiler thermostat knob (B) to maximum 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.
9. If the boiler does not light after 3 attempts the fault
codes L' 'F' will be displayed. Press the reset button
(C); the boiler will then repeat its ignition sequence.
When the burner is established the WHITE burner ON
neon (D) will be permanently illuminated.
LEgEND
A On/Off switch
B CH Thermostat knob
C Reset button
D Burner On Neon
E Display
F Injector pressure test point
g Inlet pressure test point
h Gas service cock
30
InstallatIon
A E
Flue
sampling
point
OH
thermostat
Flow
thermistor
mexico hE15, hE18 & hE24
10. ChECK ThE OpERATIONAL (WORKINg) gAs INLET pREssURE
With the boiler operating in the maximum rate condition check that
the operational (working) gas pressure at the inlet gas pressure test
point (G) complies with the requirements of "Gas Supply" on page 8.
Ensure that this inlet pressure can be obtained with all other gas
appliances in the property working.
N.B. The principle of the 1:1 gas valve ensures that the mexico
hE range is able to deliver their full output at inlet pressures down to
14mb. However if dynamic pressures below 20mb are experienced
ensure this is adequate for ALL other gas appliances in the property.
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.
11. Switch OFF the boiler on/off switch.
12. Remove the pressure gauge and tube. Tighten the sealing screw in
pressure test point. Ensure a gas tight seal is made.
13. Refit the boiler front panel.
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 and 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 or domestic hot water.
Boiler is in lockout for a specific error. The display will be blinking,
alternating with a number or letter to show which error is detected.
Boiler is in lockout for a specific error. The display will be blinking,
alternating with a number or letter to show which error is detected.
Boiler frost protection. Boiler will fire when temperature is less than
3 degrees.
C B
D
Spark
generator
Auto Air
vent
Flow thermistor
OH thermostat
Dry fire
thermistor
GAS VALVE
G
H
mexico HE -
A E
Flue
sampling
point
F
mxhe7619
mexico hE30 & hE36
Installation & Servicing
C B
D
H