Page 40
TABLE 17
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 18
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
G-Outdoor Air Dampers
Optional manual and motorized outdoor air dampers
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
manner.
return air duct. The dampers must be used any time an
DAMPER MOTOR
THUMBWHEEL
FIGURE 24
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 25
GRAVITY EXHAUST DAMPERS - HORIZONTAL
13
(330)
29-1/2
(749)
RETURN AIR PLENUM
6-1/2
(165)
FIGURE 26
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