Miscellaneous Issues; Cycling Issues - IBC EBX Series Installation And Operation Manual

11.2.2 Miscellaneous issues

Issue Diagnosis
'Ghost' call Triac or 'Power-
for heat. robbing' thermostat
sending current to
boiler.

11.2.3 Cycling issues

Issue Diagnosis
Rapid Incorrect settings or defective
Cycling thermostat.
Air in system or marginal water
flow.
Low water flow due to
improper piping.
Low water flow due to
restrictions in water pipe.
Low radiation.
Appliance Oversized.
Improperly set or defective
controls.
Miscellaneous issues
Remove CN2 connections from boiler to confirm that stray
voltage, or current induced in thermostat wiring, is source
of nuisance signal. Replace the Power Robbing
thermostat or isolate the thermostat with a relay.
Cycling issues
Check operation. Refer to manufacturer's instructions.
Check setting with ammeter.
Bleed/purge system as required. Confirm temp rise in
the heat exchanger.
Review pressure drop of boiler piping.
Check temperature differential across zone/heat
exchanger.
Check actual amount of radiation per zone and refer to
manufacturer's rating tables.
Check load calculation vs. minimum boiler output.
Check operation with ohmmeter/voltmeter.
59
11.2.2 Miscellaneous issues
Fix
Fix