York SUNLINE PLUS D1EG Betriebsanleitung PDF herunterladen (Seite 7)

OPTIONAL ECONOMIZER/MOTORIZED DAMPER

RAIN HOOD

The instruction for the optional economizer/motorized damper

rain hood can be found in form 44-320-2. Use these instructions

when field assembling an economizer rain hood onto a unit.

The outdoor and return air dampers, the damper actuator, the

damper linkage, the outdoor and return air divider baffles, and

all the control sensors are factory mounted as part of the

"Factory installed" economizer option.

ENTHALPY SET POINT ADJUSTMENT

Remove the economizer access panel from the unit to check

the following adjustments. Loosen but do not remove the two

panel latches.

CAUTION: Extreme care must be exercised in turning both the

setpoint and minimum position adjusting screws to

prevent twisting them off.

1. The enthalpy set point may now be set by selecting the

desired setpoint shown in Figure 9. Adjust as follows:

• For a single enthalpy operation, carefully turn the set

point adjusting screw to the “A”, “B”, “C” or “D” setting

corresponding to the lettered curve.

• For a dual enthalpy operation, carefully turn the set point

adjusting screw fully clockwise past the “D” setting.

2. To check that the damper blades move smoothly without

binding, carefully turn the minimum position adjusting

screw fully clockwise and then energize and de-energize

terminals “R” to “G”. With terminals “R” to “G” energized,

turn the minimum position screw counterclockwise until the

desired minimum position has been attained.

3. Replace the economizer access panel. Reposition the two

latches horizontally and retighten the screws.

POWER EXHAUST/BAROMETRIC RELIEF

DAMPER AND RAIN HOOD OPTION

The instructions for the power exhaust/barometric relief

damper and rain hood can be found in form 44-320-10. The

exhaust fan, all supporting brackets, angles, and the wiring are

factory installed as part of the power exhaust option.

All of the components, including the dampers, hardware, and

mounting instructions are shipped in a single package external

from the unit. The hood must be field assembled and installed.

Power exhaust is not available as a field installed option.

FIG. 8 - VENT AND COMBUSTION AIR HOODS

FIG. 9 - ENTHALPY SETPOINT ADJUSTMENT

530.22-N6Y

Unitary Products Group 7

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