Rheem RGRA SERIES, Installation Instructions Manual

Page: 57 / 64

57
FIGURE 64
INTEGRATED FURNACE CONTROL (IFC) UTEC 1012-925 (115 VAC IGNITER)
1. SET FAN SWITCH TO AUTO
2. SET THERMOSTAT TO CALL
FOR HEAT
START
WARNING
DISCONNECT POWER BEFORE
SERVICING.
SERVICE MUST BE BY A TRAINED,
QUALIFIED SERVICE TECHNICIAN.
HAZARDOUS VOLTAGE
LINE VOLTAGE
CONNECTIONS CAN
CAUSE PERSONAL
INJURY OR DEATH
NO
NO
YES
YES
YES
YES
YES
NO
!
INDUCED DRAFT BLOWER
MOTOR STARTS
YES
NO
PURGE CONTINUES
IGNITER WARMS UP
AND GLOWS RED
30 SECONDS WARMUP
YES
5 SEC. PREPURGE
REPLACE (IFC)
NO
REPLACE SWITCH
NO
REPLACE (IFC)
IF WIRING TO
DRAFT MOTOR IS OK
NO
REPLACE SWITCH
NO
REPLACE (IFC)
IF WIRING TO
IGNITER IS OK
NO CHECK THERMOSTAT
WIRING
• CHECK LINE VOLTAGE POWER
• CHECK LOW VOLTAGE TRANSFORMER
NOTE: STATIC DISCHARGE CAN DAMAGE INTEGRATED FURNACE CONTROL (IFC)
• “OK” LED BLINKS TO INDICATE EXTERNAL FAULTS:
(1) BLINK FOLLOWED BY A 2 SEC. PAUSE - 1 HOUR LOCKOUT
(2) BLINKS FOLLOWED BY A 2 SEC. PAUSE - PRESSURE SWITCH IS OPEN
(3) BLINKS FOLLOWED BY A 2 SEC. PAUSE - LIMIT SWITCH IS OPEN
(4) BLINKS FOLLOWED BY A 2 SEC. PAUSE - PRESSURE SWITCH SHORTED
INTEGRATED FURNACE CONTROL (IFC)
TROUBLESHOOTING GUIDE
(115 VAC IGNITER)
CHECK FOR 24 VAC
POWER FROM “R”
TO “C” ON IFC
IF THE PRESSURE SWITCH DOESN’T
CLOSE WITHIN 60 SEC. THE IOM WILL
STOP FOR 5 MIN. AND RETRY
• REMOVE (IFC) COVER, CHECK LIGHTS
MICROPROCESSOR STATUS “OK” LED ON
• CHECK FOR 115VAC TO DRAFT MOTOR
REPLACE DRAFT MOTOR
CHECK FOR 24 VAC FROM
“W” TO “C” ON IFC
• CHECK LIMITS, (CLOSED)
• CHECK WIRING
• CHECK PRESSURE SWITCH, (OPEN)
YES
REPLACE IGNITER
• CHECK FOR BLOCKED VENT
• CHECK AIR PROVING SWITCH (CLOSED)
• CHECK WIRING TO IGNITER
• CHECK FOR 115VAC AT IGNITER,
TERMINALS AND AT (IFC) TERMINALS