Manual 2100-457D
Page 8 of 16
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.
15. Adjust damper blade for required ventilation.
(See next section.)
16. Replace mist eliminator filter. Be sure that it is
installed with the drain holes to the bottom.
17. Remove blank off plate or barometric fresh air
damper installed on service access door. Plug four
(4) mounting holes with the plastic plugs provided
with the ventilator.
18. Replace service access panel.
19. Close control panel cover.
20. Ventilator is now ready for operation.
910-1622 STEP CONTROL ASSEMBLY. INSTALLS
HERE BY SEATING PLASTIC STAND-OFFS INTO
PROVIDED HOLES
ROUTE WIRES THROUGH
EXISTING WIRE LOOMS
ROUTE WIRES THROUGH BUSHING
INTO LOW VOLTAGE BOX
WIRES FROM
DAMPER MOTOR
MIS-2116
FIGURE 4
STEP CONTROL INSTALLATION