York SUNLINE MAGNADRY WR240 Technical Manual

Also see for SUNLINE MAGNADRY WR 180: Technical guide Installation manual

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York SUNLINE MAGNADRY WR240 Technical Manual Manual pdf 6 page image

262292-YTG-B-01076 Unitary Products GroupAnytime there is a call for 2 stages of cooling, the unit will notoperate in the reheat mode, even if there is a call fordehumidification at "HUM".The unit will not operate in the reheat mode if there is any callfor heating.On units with economizers, the unit will not operate in thereheat mode if there is a call for cooling and the economizer isoperating as first stage of cooling.All safety devices function as previously described."ALTERNATE” MODEWhen the RCB detects a need for dehumidification (24VAC) at"HUM" via the field supplied dehumidistat connected to RHTB-1and RHTB-2, and there is not a call for cooling, it energizes theHGR, which energizes the SOL 3, SOL 2, and de-energizesSOL 1. The unit then operates with circuit #1 in reheat modeand circuit #2 in cooling mode.When the room thermostat calls for first stage cooling whilethere is still a call for dehumidification, no operational change ismade. The call for cooling is ignored and the unit continues tooperate with circuit #1 in reheat mode and circuit #2 in coolingmode.When the room thermostat calls for second stage cooling, theRCB senses a signal through "Y1" & "Y2" and de-energizes theHGR, which de-energizes SOL 3 and SOL 2, and energizesSOL 1. Both circuits operate in the cooling mode.Indoor blower operation is initiated upon a call for first stagecooling, second stage cooling or dehumidification.Anytime there is a call for 2 stages of cooling, the unit will notoperate in the reheat mode, even if there is still a call fordehumidification at "HUM".The unit will not operate in the reheat mode if there is any callfor heating.All safety devices function as previously described.FIGURE 2: REHEAT CONTROL BOARDRY1Y2GW1OCCCW2P4P5P6 P3COMHGRRHGR HUMK1K2K4K3`MODESELECTIONJUMPERDEHUMIDISTATHARNESSCONNECTION