York D*SC360 Installation Instructions Manual

Contents

York D*SC360 Installation Instructions Manual Manual pdf 19 page image

SERVICE ANALYZERThe analyzer allows complete over-ride control of roomthermostat from the units Printed Circuit Board located withinthe control box of the unit. From this position, the user canoperate the system in cooling, heating, fan or economizeroperation.Make the following connections:1. Prior to connecting the Service Analyzer, disconnect powerto the unit (high voltage).2. Remove the red and white, 12-wire, jumper plug connectorsfrom the field service module connections located at the topof the printed circuit board by squeezing the releases onthe sides of the plug. Remove wire 119G from the PCB withsolid state controls.3. Install the female portion of the 12-wire red analyzer pluginto the red module connection of the printed circuit board.See Table 8.NOTE: Make sure that all switches on the service analyzer arein the “OFF” position prior to supplying power to theunit.SYSTEM FUNCTIONSWITCH POSITION LIGHTS PROPEROPERATIONSYSTEM HEAT COOL FAN N.S.B. ST. 1HEATST. 2HEATST. 1COOLST. 2COOL ECON. FANEconomizer 1st Stage Cool Off St. 1Econ.AutoOnOff Off Off Off Off On On Fan On, O.S.A.dampers operateto setting ofmixed air control.Economizer 2nd Stage Cool Off St. 1St. 2Econ.AutoOnOff Off Off On Off On On Fan & Compr. #1On, O.S.A. dampersoperate to setting ofmixed air control.Compr. 1st Stage Cool Off St. 1Cpr.AutoOnOff Off Off On Off Off On Fan & Compr. #1On, with O.S.A.dampers open tomin. position.Compr. 2nd Stage Cool Off St. 1St. 2Cpr.AutoOnOff Off Off On On Off On Fan, Compr. #1, 2,run with O.S.A.dampers open tomin. position.Heat 1st Stage Heat St. 1 Off AutoOnOff On Off Off Off Off On Heat sectionoperates onreduced capacity.Heat 2nd Stage Heat St. 1St. 2Off AutoOnOff On On Off Off Off On Heat sectionoperates fullcapacity.Night Setback(cool)Cool Off St. 1St. 2Cpr.AutoOnOn Off Off On On Off Off No cooling, econ.or fan operation.Night Setback(heat)Heat St. 1St. 2Off AutoOnOn On On Off Off Off Off Heat & fan onlyoperate fromN.S.B. Thermostat.TABLE 8 - SERVICE ANALYZER FUNCTION CHARTFIXED OUTSIDE AIR ADJUSTMENTTo adjust the amount of fixed outside air, see Figure 19. Locatethe amount of outside air required and the return duct static onthe chart to determine the position in which to set the blades.The blades can be adjusted by varying the position of theadjustment arm on the left side of the fixed outside air damper.EXHAUST AIR PERFORMANCESee Figure 20 for the performance of the exhaust air fans. Locatethe amount of return duct static on the left hand side of the chart.The amount of air which will be exhausted can be read from thebottom of the chart.530.25-N3YUnitary Products Group 19