York SUNLINE DCG Series Installation Manual

Contents

York SUNLINE DCG Series Installation Manual Manual pdf 18 page image

290699-YIM-B-060718 Unitary Products GroupPower exhaust is only available as a field installedaccessory.ECONOMIZER AND POWER EXHAUST DAMPERSET POINT ADJUSTMENTS AND INFORMATIONRemove the economizer access panel from the unit.Loosen but do not remove the two panel latches.Locate the economizer control module, where the fol-lowing adjustments will be made.Check that the damper blades move smoothly withoutbinding; carefully turn the Minimum Position Adjustingscrew (found on the damper control module) fullyclockwise and then set the thermostat indoor fan switchto the on position and then off, or energize and de-energize terminals “R” to “G”.MINIMUM POSITION ADJUSTMENTWith thermostat set to indoor fan on position, or termi-nals “R” to “G” energized, turn the Minimum PositionAdjusting screw (located on the damper control mod-ule) counterclockwise until the desired minimumdamper position has been attained.ENTHALPY SET POINT ADJUSTMENTThe enthalpy set point may now be set by selecting thedesired setpoint shown in the Enthalpy Setpoint Adjust-ment Figure 7. Adjust as follows:• For a single enthalpy operation carefully turnthe set point adjusting screw (found on thedamper control module) to the “A”, “B”, “C” or“D” setting corresponding to the lettered curveof the Enthalpy Setpoint Adjustment Figure 7.• For a dual enthalpy operation, carefully turnthe set point adjusting screw fully clockwisepast the “D” setting.POWER EXHAUST DAMPER SETPOINT (WITH OR WITH-OUT POWER EXHAUST)• With no power exhaust option, adjust theExhaust Air Adjustment Screw fully clockwise.• With power exhaust option, each building pres-surization requirement will be different. Thepoint at which the power exhaust comes on isdetermined by the economizer damper position(Percent Open). The Exhaust Air AdjustmentScrew should be set at the Percent Open ofthe economizer damper at which the powerexhaust is needed. It can be set from 0 to100% damper open.Extreme care must be excercised in turning allsetpoint, maximium, and minimum damperpositioning adjustment screws to prevent twist-ing them off.