SENSOR | OUTSIDE AIR SENSOR |
COVER |
|
Fig. 19 — Seal Strip Location
(Air Hood Cross-Sectional View)
BAFFLE (028 ONLY)
LOWER FILTER
RETAINER
FILTER SUPPORT
BRACKET
HOOD SIDE
PANELS (2)
HOOD TOP PANEL
BAFFLE (028 ONLY)
LOWER
FILTER
RETAINER
FILTER SUPPORT
BRACKET
HOOD DRAIN PAN
UPPER FILTER RETAINER
NOTE: The
Fig. 20 — Outdoor-Air Hood Details
COMMISSIONING — The EconoMi$er saves energy when it uses outdoor air to provide free cooling instead of mechani- cal air conditioning. The EconoMi$er switchover strategy de- termines if the outdoor air is suitable for free cooling. The EconoMi$er chooses the switchover strategy with the most en- ergy savings, provided that the required sensors are connected and functioning normally.
IMPORTANT: If a sensor stops functioning nor- mally (becomes unreliable), the EconoMi$er switches to the next best strategy.
Fig. 21 — Outdoor-Air Sensor Location
MOUNTING SCREW
SENSOR
WIRING
CONNECTIONS
MOUNTING
SCREW
WIRING
HARNESS
Fig. 22 — Outdoor-Air Sensor Details
Refer to Table 4 to determine the sensors required for each strategy.
Differential Enthalpy Switchover Strategy — The differen- tial enthalpy switchover strategy must be selected manually, if required. To enable, press and hold the CONFIG button for 30 seconds, then release. The LED will flash twice to indicate the change of configuration.
To return to single enthalpy mode, press and hold the CON- FIG button for 30 seconds. The LED will flash once to indicate the change of configuration.
DISCHARGE AIR THERMISTOR (DAT) — The discharge air thermistor is
CO2 CONTROL SETUP — If a CO2 sensor is not being used, proceed to the next section. If a CO2 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 CO2 SP (PPM) potentiometer and adjust to the desired set point. See Fig. 16.
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