Daikin DPS005 Installation And Maintenance Manual

Also see for DPS003: Installation and maintenance manual Manual

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Daikin DPS005 Installation And Maintenance Manual Manual pdf 48 page image

DPS 003–015 Sequence of OperationDANGERNever test for gas leaks with an open flame It cancause an explosion or fire resulting in property damage,personal injury, or death. Use a commercially availablesoap solution made specifically for the detection ofleaks to check all connections.WARNINGThis unit is equipped at the factory for use with naturalgas only. Conversion to LP gas requires a special kitsupplies by Daikin Parts. Failure to use the properconversion kit can cause fire, carbon monoxidepoisoning, explosion, personal injury, property damage,or death.Staged ControlThe following details the sequence of operation for the lowheat option.1 Unit DDC control calls for heat.2 Furnace DDC control module receives a call for heat.3 High limit switch is checked for safe condition.4 Proof of airflow switch is check for combustion airflow.5 60 second prepurge cycle starts.6 Spark ignitor is activated for 3 seconds.7 Gas valve receives a command for stage 1 of heat.8 Burner is ignited.9 Unit DDC controller calls for stage 2 of heat.10 Furnace DDC controller receives a stage 2 heatcommand.11 Gas valve receives a command for stage 2 of heat.Modulating ControlThe following details the sequence of operation for the lowheat option.1 Unit DDC controller calls for heat.2 Furnace DDC control module receives a call for heat.3 Furnace safety switches and DDC control are checkedfor safe conditions.4 45 second prepurge cycle starts. Proof of airflow switchis checked for combustion airflows.5 Spark ignitor is activated.6 Gas valve receives a signal to open fully.7 Burner is ignited and runs for 20 seconds in high fire.Note: if call for heat is interrupted during this timing, thefurnace will be locked in for the 20 seconds cycle.8 Gas valve and induction blower motor receives a signalto modulate burner output to match the unit discharge airtemperature setting.LP Conversion (Staged Furnace Only)For Rebel A and B Cabinets OnlyConvert the furnace in this unit using the liquefied petroleum(LP) gas valve spring and burner nozzles supplied in theconversion kit. See Table 18 for part numbersThe LP gas valve maintains the proper manifold pressure forLP gas. See Table 18. The correct burner orifices are includedin the kit.Table 18: Furnace Identification for LP ConversionUnit Size Staged Furnace3 – 6 Ton Unit 3000497257 – 15 Ton Unit 300049583Altitude ConversionFor elevations up to 2,000 feet, rating plate input ratings apply.For high altitudes (elevations over 2,000 ft.), contact DaikinParts See Table 19 for part numbersTable 19: Furnace Identifications for Altitude (DPS 003–015)Elevation Part NumberStaged Operation2000–2999 3000495783000–3999 3000495794000–4999 3000495805000–5999 3000495816000–6999 300049582IM 1125-7 • REBEL ROOFTOPS 48 www.DaikinApplied.comopTIonal gas heaT