– 14 –
SECTION VII - TROUBLE SHOOTING
continued
United Technologies Electronics Controls
Operation of the Series 1016-400 Direct Spark
Ignition Control
On a call for heat a five second pre-purge is initiated.
Upon completion of the pre-purge, the gas valve and 60
Hz spark are energized. When flame is detected, the
control enters the steady state heating condition.
Steady state heating will continue until the call for heat
is satisfied.
If ignition is not achieved within 15 seconds, the control
shuts off the gas and locks out. If the trial for ignition has
been accomplished without ignition, the control shuts
off all outputs and enters lockout. Reset is
accomplished by cycling the power off for a minimum of
5 seconds.
If flame is lost once it has been established, the control
will shut off the gas valve within 0.8 seconds and locks
out.
If flame is sensed during a purge period when no flame
should be present, the control will remain in purge with
the gas valve off until the false flame disappears.
If the gas valve is found to be powered when it should
be off, or not powered when it should be on, the control
will enter lockout with all outputs off. Reset is
accomplished by cycling the power off for a minimum of
5 seconds.
Honeywell Two Stage Valve
Two-stage models require that you check and adjsut
both high and low pressure regulator settings. Two-
stage appliance operating sequences vary. Consult
the appliance manufacturer instructions for the specific
operating sequence and regulator adjustment proce-
dure for the appliance in which the control is installed.
1. Set appliance to operate on high.
2. Carefully check the main burner lightoff. Make sure
that the main burner lights smoothly and that all
ports remain lit.
3. Check the full rate (high) manifold pressure listed
on the appliance nameplate for high pressure. The
gas control full rate outlet pressure should match
this rating.
4. With main burner operating, check the gas control
flow rate using the meter clocking method or check
pressure using a manomeer connected to the
outlet pressure tap on the gas control.
5. If necessary, adjust the high pressure regulator to
match the appliance rating.
a. Remove the pressure regulator adjustment cap.
b. Using a screwdriver, turn the inner adjustment
screw for HI pressure clockwise to
increase or counterclockwise to de-
crease the gas pressure to the burner.
6. After high ressure has been checked, check low
pressure regulation. Two-stage appliance operat-
ing sequences vary. Consult the appliance manu-
facturers instructions for the specific operating
sequence and regulator adjustment procedure for
the appliance in which the control is installed and
for instructions on how to prevent the control from
moving to high stage while checking the low
pressure regulator setting.
7. Check the low rate manifold pressure listed on the
appliance nameplate. Gas control low rate outlet
pressure should match this rating.
8. With main burner operating, check the gas control
flow rate as before (using the meter clocking
method or check pressure using a manometer
connected to the outlet pressure tap on the con-
trol).
9. If necessary, adjsut the low pressure regulator to
match the appliance rating.
a. Remove the pressure regulator adjustment cap.
b. Using a screwdriver, turn the inner adjustment
screw for LO pressure clockwise
to
increase or counterclockwise to de-
crease the gas pressure to the burner.
10. Once high and low pressure have been checked
and adjusted, replace pressure regualtor adjust-
ment cap. If the desired outlet pressure regulator
or flow rate cannot be achieved by adjusting the
gas control, check the control inlet pressure using
a manometer at the inlet pressure tap of the
control.Take the necessary steps to provide proper
gas pressure to the control.
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