Page 46
TABLE 23
ECONOMIZER OPERATIONSUITABLE
Thermostat Demand
Damper Position
Mechanical Cooling
Unoccupied Occupied
Closed Closed No
G Closed Minimum No
Modulating Modulating No
Modulating Modulating Stage 1
Y3 Modulating Modulating Stage 2
TABLE 24
ECONOMIZER OPERATIONNOT SUITABLE
Thermostat Demand
Damper Position
Mechanical Cooling
Unoccupied Occupied
Closed Closed No
G Closed Minimum* No
Closed Minimum* Stage 1
Closed Minimum* Stage 2
H-Outdoor Air Dampers
Optional manual and motorized outdoor air dampers
provide fresh outdoor air. The motorized damper assembly
opens to minimum position during the occupied time
period and remains closed during the unoccupied period.
Manual damper assembly is set at installation and
remains in that position. Set damper minimum position
in the same manner a seconomizer minimum position.
Adjust motorized damper position using the thumbwheel
fresh air intake percentage can be determined in the same
manner.
Horizontal gravity exhaust dampers are installed in the
return air duct. The dampers must be used any time an
economizer and a power exhaust fan is applied to KGC
series units Gravity exhaust dampers allow exhaust air to
be discharged from the system when an economizer and/
or power exhaust is operating. Gravity exhaust dampers
See installation instructions for more detail.
DAMPER MOTOR
THUMBWHEEL
FIGURE 35
NOTE - GED is optional except when used with power
exhaust dampers, where it is required.
GRAVITY EXHAUST DAMPERS - DOWNFLOW
DAMPER
ASSEMBLY
HOOD TOP
HOOD TOP
SUPPORT
FIGURE 36
GRAVITY EXHAUST DAMPERS - HORIZONTAL
13
(330)
29-1/2
(749)
RETURN AIR PLENUM
6-1/2
(165)
FIGURE 37
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