11
Actuator Auxiliary Switch Adjustment —
The Econo-
Mi$er actuator has two built-in power exhaust position switch
adjusters accessible on either face of the actuator. Switch 1
(SW no. 1) is factory set to energize the first stage fan (SW
no. 1) at 27 degrees open, 30% Outdoor Air (OA) and the sec-
ond stage fan (SW no. 2) at 63 degrees open, 70% OA. Switch
points are independent and adjustable from 0 to 70 degrees for
SW no. 1 and 20 to 90 degrees for SW no. 2.
These procedures serve as examples. To position the auxil-
iary switches, refer to Fig. 38 and 39 and use the following
method:
Adjusting Switch 1 — SW no. 1 has an adjustable trip point
from 0 to 70 degrees. The adjuster for SW no. 1 is factory
set at 27 degrees. To change the factory setting:
1. Remove the filter access panel to gain access to the
actuator.
2. With power applied set the Minimum Position Set
Point (located on the controller) to the desired first
stage power exhaust start point. Wait for the OA
damper to reach the desired position.
3. Use a flat-blade screwdriver to rotate SW no. 1
adjuster downward toward zero, until resistance is
encountered. Turn the adjuster in the opposite direc-
tion, until the first stage is energized. (See Fig. 38
or 39.)
Adjusting Switch 2 — SW no. 2 has an adjustable trip point
from 20 to 90 degrees. The adjuster for SW no. 2 is factory
set at 63 degrees. To change the factory setting:
1. Reset the Minimum Position Set Point located on the
controller to the desired second stage power exhaust
start point. Wait for the OA damper to reach the
desired position.
2. Use a flat-blade screwdriver to rotate SW no. 2
adjuster downward toward 20 degrees, until resistance
is encountered. Turn the adjuster in the opposite direc-
tion, until the second stage is energized. (See Fig. 38
or 39.)
3. Return the Minimum Position Set Point to the desired
setting.
4. Replace the filter access panel.
IMPORTANT: Do not force the switch adjuster out
of the allowable range, or damage to the switch may
occur.
SENSOR
ECONOMI$ER
SIDE PANEL
MOUNTING
BRACKET
NO. 10
SELF-DRILLING
SCREWS (2)
Fig. 35 — Mounting the Sensor and Bracket in a 3 to 6 Ton Vertical EconoMi$er Assembly
Fig. 36 — Mounting the Sensor and Bracket
in a Horizontal EconoMi$er Assembly
Fig. 37 — Location of the Return Air Sensor
and Bracket
