Carrier BW9 Series Installation Instructions Manual

Also see for BW9 Series: User's information manual User manual Operation and maintenance guide

Contents

30CHECK THAT CIRCUIT BREAKERS IS ON ORFUSES ARE OK AT THE ELECTRICAL PANELCHECK THAT SERVICE SWITCH IS ONOKONNOCHART 1CHECK CASTING TEMPERATURE SAFETYSWITCH. PUSH RESET BUTTON ON SWITCH.CONTACTS OPEN (BUTTON UP) OR CLOSED(BUTTON DOWN)?CLOSEDCHECK WIRING TO IBC. I20 VAC BETWEENTERMINALS 1 AND 3 AT WIRING HARNESSPLUG CN7?YES120 VAC BETWEEN TERMINALS 1 AND 3 ATCONNECTOR CN3 OR IBC?YES120 VAC AT TRANSFORMER PRIMARYTERMINALS?YES24 VAC AT TRANSFORMER SECONDARYTERMINALS?YESYES24 VAC AT WIRING HARNESS PLUG CN2?REPLACE IBCNONONONO REPLACE IBCREPAIR WIRING TO TRANSFORMERREPLACE TRANSFORMERPUSH RESET BUTTON ON CASTING TEMPSAFETY SWITCH. CHECK CONTINUITY OFCASTING TEMP. SAFETY SWITCH CONTACTS.CONACTS OPEN OR CLOSED?CLOSED OPENREPLACE CAST. TEMP.SAFETY SWITCH.REPLACE/REPAIR WIRING FROMTRANSFORMER TO IBCREPLACE IBCREPLACE/REPAIR WIRING FROM IBC TOCIRCULATORNONOYESYESNOCHART 1CHECK FOR 120 VAC BETWEEN TERMINALS 1AND 3 AT CONNECTOR CN5 ON IBC?CHECK FOR 120 VAC AT CIRCULATORREPAIR/REPLACE CIRCULATORTROUBLESHOOTING CHART 2NOOPENREPLACE/REPAIR WIRING FROM SERVICESWITCH TO IBCCHECK WATER LEVEL IN BOILER. CHECKFOR AIR TRAPPED IN TOP OF BOILER.CONTACTS WILL NOT STAY CLOSED UNTILBOILER COOLS OFF.TROUBLESHOOTINGA99352Fig. 28 --- Troubleshooting Chart No. 2