Burnham 8HE Series Installation, Operating And Service Instructions page 37

8
Service
(continued)
I. Check Electronic Ignition Module Status
See Figure 8-3 for the location of the status
LED on the electronic ignition (EI) module.
Table 8-5 provides green LED status codes and
recommended service action where applicable.
See Figure 8-6 for Troubleshooting Guide.
Figure 8-3: Location of LED
J. Flame Current Measurement Procedure
1. Pilot flame current in micro amps can be
measured using any standard micro-ammeter
by inserting meter probes into module hole
labeled FLAME CURRENT as shown in Figure
8-4.
2. Flame current must be measured with pilot
valve open/pilot lit but main valve closed.
3. Disconnect MV lead wire from module before
measuring flame current. Trying to measure
pilot flame current in series with the wiring will
not yield accurate reading.
4. Minimum steady pilot flame signal must be 1
μAmp (microampere) DC (direct current).
5. For reliable operation flame current should be
2 μAmp or greater.
6. To ensure adequate flame current:
a. Turn off boiler power at circuit breaker or
fuse box.
b. Clean the flame rod with emery cloth if
required.
c. Make sure electrical connections are clean
and tight, and wiring not damaged, repair/
replace as needed.
d. Check for igniter/sensor cracked ceramic
insulator, replace if needed.
e. Check pilot flame. It must be blue, steady
and envelop flame sensing rod 3/8 in. to 1/2
in.
111828-01 - 1/23
8HE Installation, Operating & Service Instructions
f. If needed, adjust pilot flame by turning the
gas valve pilot adjustment screw clockwise
to decrease or counterclockwise to increase
pilot flame. Always reinstall pilot adjustment
screw cover and tighten securely upon
completion to assure proper gas valve
operation.
7. Reconnect MV lead wire to module upon
satisfactory completion of pilot flame current
measurement.
8. Check pilot burner operation/ignition sequence
during ignition cycle:
a. Restore boiler power at circuit breaker or
fuse box.
b. Set thermostat to call for heat.
c. Watch ignition sequence at burner.
d. If spark does not stop after pilot lights,
replace ignition module.
e. If main burners do not light or if main
burners light but system locks out, check
the module ground wire and gas control
as described in the Honeywell Electronic
Ignition Troubleshooting Guide, Figure 8-6.
K. Check operation. Refer to Section 7: System Start-
up.
Figure 8-4: Measuring Pilot Flame Current with
Micro-ammeter
37