45
Right Hood
Side Panel
Hood Top Panel
Left Hood
Side Panel
Hood
Divider
A09700
Fig. 38 -- Hood Assembly
A09701
Fig. 39 -- Economizer Hood Installation
11. Open 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. 40.
12. To replace air filters, open filter access door remove old
filters and install new disposable filters in filter rack. See
Table 18 for filter part numbers.
IMPORTANT
: On the the bent coil (See Fig. 41 to determine coil
type) filter rack, the 18 x 24 x 1 (257.2mm x 609.6mm x25.4mm)
filter must be installed through the filter access door first then
install the 16 x 24 x 1 (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 18 – Filter Part Number
DESCRIPTION
PART NUMBER
Straight Indoor
Coil Air Filter
14 x 24 x 1
(355.6 x 609.6 x 25.4 mm)
KH01AA314
16 x 24 x 1
(406.4 x 609.6 x 25.4 mm)
KH01AA316
Bent Indoor
Coil Air Filter
16 x 24 x 1
(406.4 x 609.6 x 25.4 mm)
KH01AA316
18 x 24 x 1
(457.2 x 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
controller should be set to the “D” position.
(2.) The low ambient compressor lockout switch setting
is fixed at 42
_
F (5.6
_
C).
(3.) The minimum position for the outdoor air damper
can be configured at the controller. When not using
a CO
2
sensor, the DCV Max potentiometer must be
completely closed (CCW) for the Minimum Posi-
tion potentiometer to function correctly.
(4.) Settings for the optional outdoor enthalpy sensor,
indoor enthalpy sensor, and CO
2
sensor can also be
configured at the controller.
14. Replace 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.
674D
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--
A
Содержание Legacy 674D
Страница 3: ...3 A09473 Fig 2 674D A24 36 Unit Dimensions 674D A...
Страница 4: ...4 A09474 Fig 3 674D A42 60 Unit Dimensions 674D A...
Страница 24: ...24 A10207C Fig 14 208 230 1 60 Connection Wiring Diagram Unit 674D 674D A...
Страница 25: ...25 A10207L Fig 14 Cont 208 230 1 60 Ladder Wiring Diagram Unit 674D A 674D A...
Страница 26: ...26 A10208C Fig 15 208 230 3 60 Connection Wiring Diagram Unit 674D A 674D A...
Страница 27: ...27 A10208L Fig 15 Cont 208 230 3 60 Ladder Wiring Diagram Unit 674D A 674D A...
Страница 28: ...28 A08019 Fig 16 Cooling Charging Table Subcooling 674D A...
Страница 49: ...49 A10059 Fig 49 Economizer Wiring Diagram 674D A...