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38
Right Hood
Side Panel
Hood Top Panel
Left Hood
Side Panel
Hood
Divider
A09700
Fig. 33 -- Hood Assembly
A09701
Fig. 34 -- Economizer Hood Installation
11. O pen the filter clips on the inside of the hood top. Insert the
aluminum filter into the hood and close the clips to hold in
place. See Fig. 35.
12. To replace air filters, open filter access door remove old
filters and install new disposable filters in filter rack. See
Table 14 for filter part numbers.
IMPORTANT: On the the bent coil (See Fig. 36 to determine coil
type) filter rack, the 18 x 24x1(257.2mm x 609.6mm x25.4mm)
filter must be installed through the filter access door first then
installthe16x24x1(406.4mm x 609.6mm x 25.4mm) filter.
NOTE: The economizer control settings and the filters are
accessible through the filter access door.
Table 14 – Filter Part Number
DESCRIPTION PART NUMBER
Straight Indoor
Coil AirFilter
14 x 24 x 1
(355.6x 609.6 x 25.4 mm)
KH01AA314
16 x 24 x 1
(406.4x 609.6 x 25.4 mm)
KH01AA316
Bent Indoor
Coil AirFilter
16 x 24 x 1
(406.4x 609.6 x 25.4 mm)
KH01AA316
18 x 24 x 1
(457.2x 609.5 x 25.4 mm)
KH01AA318
13. Economizer controls are set to a standard factory setting.
Nevertheless, you can adjust these settings through the filter
access door. Review the settings in the Operation section:
(1.) The standard economizer controller has a factory
setting of “C” for the outdoor air temperature
changeover and 63_F(17_C) for the supply air
(mixed air) temperature sensor. The outdoor air
temperature changeover setting is adjusted on the
sensor by setting the dip switches on the sensor .
The ABCD potentiometer on the economizer
control should be set to the “D” position.
(2.) The low ambient compressor lockout switch setting
is fixed at 42_F(5.6_C).
(3.) T he minimum position for the outdoor air damper
can be configured at the controller. When not using
aCO
2
sensor, the DCV Max potentiometer must be
completely closed (CCS) for the Minimum Posi-
tion potentiometer to function c orrectly .
(4.) Settings for the optional outdoor enthalpy sensor,
indoor en thalpy sensor, and CO
2
sensor can also be
configured at the controller.
14. Re place the filter access panel. Screw in place ensuring all
seams are air and watertight.
15. Install all economizer accessories then power HVAC unit
and test cycle economizer.
604D-- --A