Schwank STV-JZ Manuel du propriétaire télécharger pdf (Page 37)

STV-JZ I&O Manual

IM090512

RD: MAY 2009

RL: 08A- BA

 CHECK 120V SUPPLY TO RELAY SWITCH

 IF ELECTRICAL SUPPLY PROBLEM …. MAKE RE-

QUIRED REPAIR TO RESTORE 120V

 CHECK FOR 120V FROM RELAY SWITCH

 IF “NO” SWITCHING IS OCURRING......REPLACE

THE RELAY SWITCH

SET THERMOSTAT TO CALL FOR HEAT

APPLY 120 VOLTS - GREEN LIGHT IS ON

 CHECK IF 120 VOLTS PRESENT AT VACUUM

PUMP

 IF “YES”.....CHECK FOR PHYSICAL BLOCKAGE OF

THE PUMP; REPLACE DEFECTIVE VACUUM

PUMP

VACUUM PUMP STARTS

A.P.S. HAS CLOSED (B.F.S. IS CLOSED)

24 VOLTS PRESENT AT DSI CONTROL.

AMBER LIGHT IS ON

 CHECK FOR OBSTRUCTION IN THE AIR INTAKE

AND FLUE

 CHECK TUBING TO SWITCHES IS CONNECTED

AND NOT BLOCKED OR KINKED

 CHECK IF AIR PROVING SWITCH IS CLOSING

WHEN BLOWER IS RUNNING

 CHECK AIR PRESSURE WITH MANOMETER

 REPLACE ANY DEFECTIVE SWITCH

 CHECK DSI CONTROL FUSE FOR CONTINUITY

 VISIBLY CHECK IF IGNITER IS SHORTING OUT

 CHECK GROUND WIRING

 REMOVE AND INSPECT IGNITER AND LEAD

 CHECK BOOT OF THE IGNITION CABLE FOR SIGNS

OF MELTING OR OVERHEATING

 IF “YES” ... TAKE PROTECTIVE ACTION TO SHIELD

CABLE AND BOOT FROM EXCESSIVE TEMPERA-

TURE; REPLACE ANY DEFECTIVE COMPONENT

 CHECK CERAMIC INSULATOR AND CAP

 CHECK SPARK GAP SETTING IS 3/16” (ADJUST BY

MOVING THE GROUND PRONG ONLY

)

 PERFORM IGNITION LEAD TEST (See SPARK IGNI-

TION CIRCUIT INSTRUCTIONS—Section 22)

 GOOD SPARK.....REPLACE IGNITER

 NO SPARK/OR WEAK.....REPLACE CONTROL

SPARK IGNITER / SENSOR

24V TO GAS VALVE - RED LIGHT IS ON

CONTINUED

SEQUENCE OF EVENTS

21. TROUBLESHOOTING GUIDE

YES

WARN-

Improper adjustment, alteration, service or maintenance can

cause property damage, injury or death. This heater must be

installed and serviced only by a trained gas service technician

YES

 CHECK 24V SUPPLY TO RELAY SWITCH

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Schwank STV-JZ Manuel du propriétaire Page 37

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