
IOMDFCDFM-1INSTALLATION, OPERATION ANDMAINTENANCE MANUAL FOR DFC & DFMATTENTION: READ THIS MANUAL AND ALL LABELS ATTACHED TO THE UNIT CAREFULLY BE
– 10 –SECTION IV - PRE START-UPDo not attempt start-up without completely reading and understanding this manual, along with the Digital Control Sysem
– 11 –BEFORE ATTEMPTING TO START THE HEATER, READ THE TYPICAL SEQUENCE OF OPERATION AS SHOWN BELOW:Typical Sequence of Operations Note: This sequence
– 12 –SECTION V - UNIT START-UP GENERALBefore attempting to start the heater read and understand the the sequence of operations and electrical schemat
– 13 –Honeywell Flame Safeguard ControlA keyboard display module (Honeywell #S7800A1142) is recommended to read the fl ame signal, and is a good troubl
– 14 –SECTION VI - UNIT SHUTDOWNA. Extended Shutdown —1. Disable the heating and cooling for 30 seconds, then disable the fan.2. Close all manual
– 15 –SECTION VII - TROUBLE SHOOTINGHONEYWELL RM7897A1002, RM7897C10007800 SERIES RELAY MODULESPRINCIPAL TECHNICAL FEATURESThe RM7897 provides all cus
– 16 –SECTION VII - TROUBLE SHOOTING continuedCauses for hold conditions in the INITIATE sequence:1. AC line dropout detection.2. AC line noise th
– 17 –SEQUENCESTATUSLEDsRESETPUSHBUTTONFLAME SIMULATOR INPUTFLAME CURRENTTEST JACKSRUN/TEST SWITCH(RM7895C,D; EC7895C; RM7896C,D)CAPTIVEMOUNTINGSCREWP
– 18 –Figure 2 - Wiring Subbase and Sequence Chart for RM7897ASECTION VII - TROUBLE SHOOTING continuedM22728BGL235678910F(L1)1314151617181920212212MAS
– 19 –SECTION VII - TROUBLE SHOOTING continuedThe POWER LED provides fault identifi cation when the Relay Module locks out on an alarm. Fault identifi c
– 2 –*IMPORTANCE NOTICE*Applied Air assumes no responsibility for loss or damage in transit; therefore, you should protect yourself by following these
– 20 –Blinking Fault Codes and Recommended TroubleshootingRecommended TroubleshootingFault Code System FailureCode 3-2*Running/Interlock OnDuringStand
– 21 –Blinking Fault Codes and Recommended TroubleshootingRecommended TroubleshootingFault Code System FailureCode 5-3*Man-OpenSw.; Start Sw.or Contro
– 22 – Symptom Cause RemedyA. Blower does not operate.B. No voltage at fl ame safeguard relay (RE-02) input terminal and the fan is enabled. C.
– 3 –SECTION II - GENERAL INFORMATIONA. PurposeThe purpose of this manual is to present a guide for proper installation, maintenance, and operation of
– 4 –SECTION III - INSTALLATIONblower does not rub against blower housing, and that bearing set screws are tight. If units are not set imme-diately, c
– 5 –B. Locating the UnitPrior to locating the unit, authorities having jurisdic-tion should be consulted before installations are made. Approval perm
– 6 –E. Electrical ConnectionsWARNING: Open all disconnect switches and secure in that position before wiring unit. Failure to do so may result in per
– 7 –The appliance must be isolated from the gas supply pip-ing system by closing it’s individual manual shutoff valve during any pressure testing of
– 8 –AMPLIFIER WING(SHEET METAL STRIP)TOTAL PRESSURESENSING TUBEBULLETSTATIC PRESSURESENSING TUBEHIGH PRESSURETUBE CONNECTIONLOW PRESSURETUBE CONNECTI
– 9 –DIRECTIONS FOR FIELD ASSEMBLING AND WEATHERPFOOFING SECTIONS1. Apply gasket material to the end of the fi rst section (blower, discharge, heater,
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