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I_-INDO(:W_FANI)EI.AY J___(HEATING)
2 _S - OFmNING OF LIMffSWRCH
3 _S - _ 81_813f1
IN_CATES FLAME WITH
CLOSED C:':':':':':':':':_VALVE
4 FI.ASI'E8 - LIW_ SWITCH
CYCLED 4 TIMES ON SINGLE
CALLFOR HEAT
(No _ wth_ 15 _)
6FI.ASHES-iNDUCEDDRAFT
MOTORFAULT
(NOsigr_ fremf_'__ !_t
8enm:,rforB0mKx_,es)
I 7 _ - OPtENING OFROLLCtrr 8_MICH
SOFTWARE FAULT
I 9 FLASHES - SOFTWARELOCKOUT
F
I , I
I_ OU113OOR FAN MOTOR
STeEr I_TELY
I. I
, ,FOR iNDOOR FAN I
I COOLING DEMAND
t
OUIDOOR F/M_STOP
IMMEDIATELY
I ;GC SAFELY LOGIC WILL SHUT
OFF GAS VALVE AND sPARK
4,
Y_
LEGEND
IGC -- Integrated Gas Unit Controller
NOTE: Thermostat Fan Switch in the "AUTO"
position.
--_ OFF YES IGC BOARD
I , BLOWN 5 AMP FUSE
2. DEFECTIVE _V TRANS.
& BROKB_ V_IRE
1L & NO POWB_ TO U_T
HEATING
I
I
I
'Wl' FROM BASE CONTROL BOARD ENERGIZES 'W'
ON IGC - 1 MINUTE LOCK-ON
RELAY ON _C B EN_
I
I
I
t
t,
1 __ B_N.o ATCO_-CT_ (ATLEA-__0.P_, _L I
EE--CT 8EN8OR SENDS CORRECT 81GNAL TO _ 'Jf ON K3C
F LIMITswrrcH AND ROLLOUT
9A,TI'CH ARE CLOSED, IGC _
LOGIC _ INITIATIE IGNITION
SEQUENCE
_ _I"ES A
10,000 Vt3LT 8PN_K FO_ 5
I
Yes
I _FrER_OONI_(O_LESS.:T_ETI_e I
H_S BEEN R_ D_J_TO _ 81/_TCH
TRIPS) tGC _MLL B_ERGIZE BLOWISR RELAY
I _3c SAFEW LO_C OPENS GAS
VALVE FOR 5 SEONOS
I
No
t
I _,, s_.._Er_ LO_C_._rsOFF_ VALVE I
I 45 SECOND BLOWER SHUTOFF DELAY I
(DELAY _ BY 5 880OND8 FOR ESE;H UMfr 8w_roH TRP -
MAXIMUM DELAY: 3 MINLrlEs)
!
SUBTRACT 5 S_CONDS (OR J
5 _:CONDS) FROM
J
_DOOR F_ ON TIME DE_AY
Fig. 60 -- IGC Control (Heating and Cooling)
51