User`s manual

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18
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NOTE: Be sure to engage rear EconoMi$er flange under tabs
in return air opening of the unit base. See Fig. 37.
8. Install the outdoor air block-off plate, then secure the
EconoMi$er with the screws provided. See Fig. 36
and 38.
9. Remove and discard the 12-pin jumper plug from the
unit wiring harness located in the upper left corner
and insert the EconoMi$er plug into the unit wiring
harness. Refer to wiring diagram Fig. 39 and 40. Also
refer to Fig. 41 if installing an accessory power
exhaust.
10. Install the complete hood assembly on the unit and
secure using the screws provided.
11. Remove the indoor fan motor access panel.
12. Mount the supply air temperature sensor to the lower
left portion of the indoor blower housing with the two
(2) screws provided (see Fig. 42). Connect the violet
and pink wires to the corresponding connections on
the supply air temperature sensor. Replace the indoor
fan motor access panel.
CO
2
Control Setup
If a CO
2
sensor is not being used, proceed to the next section.
If a CO
2
sensor is being used, perform the following:
1. Determine the value at which you want the minimum
position of the dampers to begin opening to allow a
greater amount of outdoor air to enter. The range is
800 to 1,400 ppm.
2. Locate the CO
2
SP (PPM) potentiometer and adjust
to the desired set point. See Fig. 43.
Fig. 39 — EconoMi$er Wiring
OAT —
Outdoor Air Thermostat
ECONOMIZER
ECONOMIZER REAR
FLANGE
UNIT BASE
UNIT FILTER
RACK
ECONOMIZER CLIP
HVAC UNIT
WIRING HARNESS
OUTDOOR AIR
BLOCK-OFF PLATE
Fig. 37 — Rear EconoMi$er Flange Installation
Fig. 38 — EconoMi$er Installed