Page 18
LAARS Heating Systems
RESET BOILER CONTROL BY
SWITCHING POWER OF FOR 15
SECONDS AND THEN ON AGAIN
WITH A CALL FOR HEAT / HOT
WATER AFTER APPROX. TWO
SECONDS GREEN LIGHT COMES
ON AND BLOWER STARTS
AFTER FIVE MINUTES RED
"PURGE" LIGHT FLASHES
STACK SWITCH CONTACTS
NOT CLOSING CHECK FOR
FLUE BLOCKAGE (SNOW,
LEAVES ETC.) AGAINST
VENT TERMINAL
CYCLE BOILER MANY TIMES
TO TRY TO CREATE A
MALFUNCTION
CLEAR BLOCKAGE AND
RECYCLE BOILER
CHECK STACK SWITCH
BLOCKAGE
EXISTS
NO
BLOCKAGE
NO
YES
YES
NO
RED "PURGE" LIGHT FLASHING
(YOU MUST COMPLETE PAGE 16 FIRST)
AFTER 45 SECONDS RED
"PURGE" LIGHT FLASHES
AFTER 5 MINS
RED "PURGE"
LITE FLASHES
NO
CHECK BLOWER PAGE 20
YES
SHUT OFF POWER, DISCONNECT
WIRES TO STACK SWITCH, TURN
ON POWER - AFTER TWO SEC-
ONDS BLOWER STARTS
RECONNECT STACK
SWITCH WIRES.
CHECK BLOWER
CHECK STACK SWITCH
YES
NO
YES
