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E-Outdoor Air Dampers
OUTDOOR AIR DAMPER
MANUAL
DAMPER
FIGURE 28
Z1DAMP21 is a motorized outdoor air damper and
Z1DAMP11 is a manual outdoor air damper. See figure
28. Both sets include the outdoor air hood. The dampers
provide motorized or manual operation to allow up to 35
percent outside air into the system at all times. Washable
filter supplied with the outdoor air dampers can be cleaned
with water and a mild detergent. It should be sprayed with
Filter Handicoater when dry prior to reinstallation. Filter
Handicoater is R.P. Products coating no. 418 and is avail-
able as Part No. P-8-5069.
Optional manual and motorized outdoor air dampers pro-
vide fresh outdoor air. The motorized damper assembly
opens to minimum position during the occupied time pe-
riod and remains closed during the unoccupied period.
Manual damper assembly is set at installation and re-
mains in that position.
MOTORIZED
DAMPER
Set damper minimum position in the same manner as
economizer minimum position. Adjust motorized damper
position as shown in figure 29. Manual damper fresh air
intake percentage can be determined in the same manner.
F-Power Exhaust Relay K65 (power exhaust units)
Power exhaust relay K65 is a DPDT relay with a 24VAC
coil. K65 is used in all ZGB units equipped with the option-
al power exhaust dampers. K65 is energized by the econ-
omizer enthalpy control A6, after the economizer dampers
reach 50% open (adjustable) When K65 closes, exhaust
fan B10 is energized.
INTERLINK DAMPER MOTOR
Damper stops are factory-set at 100% outdoor air and
are adjustable in five degree increments. To adjust fresh
air percentage, remove retainer clip and adjust damper
stop to desired air percentage. Replace retainer clip.
100%
CLOSED
RETAINER
CLIP
Page 49
DAMPER
STOP
FIGURE 29
100%
OPEN
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