Install Instructions

21
VIII. Service
A. General. Inspection and service should be conducted
annually, except as noted. Turn off electrical power and
gas supply while conducting service or maintenance.
Follow instructions TO TURN OFF GAS TO
APPLIANCE. See Figure 16 for Intermittent Ignition
(EI).
CAUTION
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify proper
operation after servicing.
B. Flame Current Measurement Procedure.
See Figure 17 “Measuring pilot ame current with
micro-ammeter”.
Table 10 cross-references the ignition module terminal
designations to the ignition terminal numbers in the
wiring ladder diagrams. Table 11 provides green LED
status codes and recommended service action where
applicable.
1. Pilot ame current in micro amps can be measured
using any standard micro-ammeter by inserting the
meter probes into the module holes labeled FLAME
CURRENT as shown in Figure 17.
2. Flame current must be measured with pilot valve
open/pilot lit but the main valve closed.
3. Disconnect MV lead wire from the module before
measuring ame current. Trying to measure the pilot
ame current in series with the wiring will not yield
the accurate reading.
4. The minimum steady pilot ame signal must be 1
μAmp (microampere) DC (direct current).
WARNING
Service on this boiler should be undertaken only by trained and skilled personnel from a qualied service
agency. Inspections should be performed at intervals specied in this manual. Maintain manual in a legible
condition.
Keep boiler area clear and free of combustible materials, gasoline and other ammable vapors and liquids.
Do not place any obstructions in boiler room that will hinder ow of combustion and ventilation air.
Figure 17: Measuring Pilot Flame Current with Micro-ammeter