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F. Now energize the Stage #2 cooling/heating by
increasing the thermostat setting to a greater
offset than the actual room temperature.
(Jumper "R" to "G", "Y1" and "Y2")
G. Ventilator should now open to the position set
by "R3" potentiometer on step control board.
(See Figure 5.)
H. Now turn the heat/cool selector to OFF, and set
the fan switch back to AUTO. The damper
blade should close. (Remove all jumper
connections.)
I. This completes the ventilator checkout.
WIRES FROM
DAMPER MOTOR
Manual 2100-457D
Page
8 of 16
15. Adjust damper blade for required ventilation.
16. Replace mist eliminator filter. Be sure that it is
17. Remove blank off plate or barometric fresh air
18. Replace service access panel.
19. Close control panel cover.
20. Ventilator is now ready for operation.
FIGURE 4
STEP CONTROL INSTALLATION
910-1622 STEP CONTROL ASSEMBLY. INSTALLS
HERE BY SEATING PLASTIC STAND-OFFS INTO
PROVIDED HOLES
ROUTE WIRES THROUGH BUSHING
INTO LOW VOLTAGE BOX
(See next section.)
installed with the drain holes to the bottom.
damper installed on service access door. Plug four
(4) mounting holes with the plastic plugs provided
with the ventilator.
ROUTE WIRES THROUGH
EXISTING WIRE LOOMS
MIS-2116
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