IBC DC Series Installation And Operating Instructions Manual

IBC DC Series Installation And Operating Instructions Manual Manual pdf 50 page image

INSTALLATION AND OPERATION INSTRUCTIONS2-6DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160SEQUENCE OF OPERATIONThe boiler / water heater will operate in a similar way for both a space heatingand a domestic hot water call for heat. When the boiler / water heater is poweredup the controller enters a self diagnostic mode and displays 2 in the ServiceDisplay.The Sequence of Operation is as follows:1. The boiler / water heater receives a call for heat from closing terminals X4.6and X4.7 (24 volts). The boiler / water heater can also receive a call fromDomestic Hot Water heating from the internal flow sensor, or from a 10KΩsensor or aquastat (X4.9 and X4.10 in 24V terminal).2. The boiler / water heater does a safety check and energizes the fan for a pre-purge (Service Display = 3)3. Once the 5 second pre-purge is compete, the boiler / water heater enters a 5second trial for ignition (Service Display = 4). If the boiler / water heater failsto ignite, the boiler / water heater will compete a 5 second inter-purge thenanother 5 second trial for ignition. This is repeated 4 times before a hard lockout occurs. The Reset button must be pressed to reset the controllerand allow for another attempt.4. Once the burner is lit and flame has been proven the boiler / water heateroperates as it is programmed (Service Display = 5 for Space Heating or 6 forDomestic Hot Water)5. If the boiler / water heater reaches its target temperature and there is still acall for heat or hot water. (Service Display = 1)6. After the call for heat is satisfied, the boiler / water heater pump will operatefor an adjustable amount of time (Service Display = 0)7. If the burner is on to maintain the heat exchanger temperature for DHWComfort mode or for Freeze Protection mode (Service Display = 7)8. If the burner is on for Frost Protection (Service Display = 9)MAINDISPLAYSERVICEDISPLAYDESCRIPTION[Pressuree.g., 14 P]- The boiler / water heater is OFF. Press the On/Offbutton to turn on the boiler(blank) (blank) No Call for Heat - StandbyXXX 0 Boiler / water heater pump running – pump post purgeXXX 1 Boiler / water heater water temperature reached target –boiler / water heater pump is energized, call for heat stillpresentXXX 2 Self-test – When power is applied to the boiler / waterheater the controller enters a self diagnostic mode for 5secondsXXX 3 Fan Pre-purge , Inter-purge and Post-purgeXXX 4 Trial for Ignition and Flame ProvingXXX 5 Heating – Space HeatingXXX 6 Heating – DHWXXX 7 Burner on for Comfort mode or Freeze Protection modeTable 9: Operating Display and Service Display Codes.2.7NOTEThe boiler / water heateris equipped with a FrostProtection feature. Thisfeature will operate the boilerpump and the burner to helpprotect the boiler / waterheater from freezing. If theboiler / water heater is ina hard lock-out conditionthe burner will not operate,however the boiler / waterheater pump will operate.IBC is not responsible fordamages to the boiler, and/or related components,nor property damages thatmay result from freezingconditions.