York SUNLINE 2000 Installation Manual

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175245-YIM-C-100812 Johnson Controls Unitary ProductsOPTIONAL ECONOMIZER/MOTORIZED DAMPER RAINHOODThe instruction for the optional economizer/motorizeddamper rain hood can be found in the kit. Use theseinstructions when field assembling an economizer rainhood onto a unit. The outdoor and return air dampers,the damper actuator, the damper linkage, the outdoorand return air divider baffles, and all the control sen-sors are factory mounted as part of the "Factoryinstalled" economizer option.OPTIONAL POWER EXHAUST/BAROMETRIC RELIEFDAMPER RAIN HOODThe instructions for the power exhaust/barometric reliefdamper rain hood can be found in the kit. The exhaustfan, all supporting brackets, angles, and the wiring arefactory installed as part of the power exhaust option.OPTIONAL ECONOMIZER AND POWER EXHAUSTDAMPER SET POINT ADJUSTMENTS AND INFORMA-TIONRemove 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, orterminals "R" to "G" energized, turn the MinimumPosition Adjusting screw (located on the dampercontrol module) counterclockwise until the desiredminimum damper 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 6. Adjust as follows:• For a single enthalpy operation carefully turn theset point adjusting screw (found on the dampercontrol module) to the "A", "B", "C" or "D" settingcorresponding to the lettered curve of the EnthalpySetpoint Adjustment Figure 6.• For a dual enthalpy operation, carefully turn the setpoint adjusting screw fully clockwise past the "D"setting.POWER EXHAUST DAMPER SETPOINTWith power exhaust option, each building pressuriza-tion requirement will be different. The point at which thepower exhaust comes on is determined by the econo-mizer damper position (Percent Open). The ExhaustAir Adjustment Screw should be set at the PercentOpen of the economizer damper at which the powerexhaust is needed. It can be set from 0 to 100%damper open.INDOOR AIR QUALITY AQIndoor Air quality (indoor sensor input): Terminal AQaccepts a +2 to +10 Vdc signal with respect to the(AQ1) terminal. When the signal is below it's setpoint,the actuator is allowed to modulate normally inaccordance with the enthalpy and mixed air sensorinputs. When the AQ signal exceeds it's setpointsetting and there is no call for free cooling, the actuatoris proportionately modulated from the 2 to 10 Vdcsignal, with 2 Vdc corresponding to full closed and 10Vdc corresponding to full open. When there is no callfor free cooling, the damper position is limited by theIAQ Max damper position setting. When the signalexceeds it's setpoint (Demand Control VentilationSetpoint) setting and there is a call for free cooling, theactuator modulates from the minimum position to thefull open position based on the highest call from eitherthe mixed air sensor input or the AQ voltage input.TABLE 3: ELECTRIC HEAT APPLICATION DATANOMINALHEATER SIZE(KW)VOLTAGE3-PHASE,60 HZMINIMUM CFM UNIT SIZE20 TON18 208/230,460,575600036 208/230,460,57554 208/230460,57572 208/230460,575Extreme care must be exercised in turning allsetpoint, maximum, and minimum damperpositioning adjustment screws to prevent twist-ing them off.