Since 1965
MicroMetl
Rooftop Unit’s
12-Pin Male Plug
Economizer
12-Pin Female Plug
Fig. 4 - Connect Economizer Harness to
Unit PL6 Economizer Harness
Step 7: Remove and save the 12-pin jumper plug from the unit
economizer harness – located in the upper left corner of the unit.
Insert the PL6 plug to the economizer actuator, then Insert the
economizer plug into the unit wiring harness. See Figure 4
Note: the 12-pin jumper plug should be saved for future use, in the
event that the economizer is ever removed. The jumper plug is not
needed as long as the economizer is installed.
Step 8: Screw OA sensor provided in parts bag with
economizer directly through pre-punched holes located on
economizer. Connect the pink and violet (OAT) harness if you have
the 9901-2021 dry bulb sensor or the gray (S-Bus) harness to the
enthalpy sensor. Refer to “9901-2022 Outside Air Enthalpy Sensor”
section for more details on enthalpy settings.
See Economizer Component Locations.
Economizer Component Locations
Economizer
PL6
Wiring Harness
Outside
Air Damper
Outside
Air
Sensor
Barometric Relief
Dampers
Indoor Blower
Access Panel
Unit Control
Box Panel(s)
Center Post
Figure 6 – Mount Controller Assembly in Unit
Control Box next to Units with a UCB
(Some control box configurations may differ)
Step 9: Remove the indoor blower access panel
and the panel(s) covering the unit control box. See
Figure 5.
Step 10: In parts bag provided with economizer is
the 9901-2020 Jade Controller (Honeywell W7220).
The economizer harness is attached to the
controller. Screw the controller directly to the
control box through pre-punched holes in control
box to the left side of the UCD. See Figure 6.
Parts Bag
OR
*D
*E
H
Male Plug from UCB
connected to female plug
from Siemens controller
Fig. 5 - Typical Indoor Fan Motor Access Panel Locations
12-Pin Male Plug from
Siemens controller to UCB
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