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POTENTIOMETER
DEFAULTS SETTINGS:
POWER EXH
MIDDLE
MINIMUM POS.
FULLY CLOSED
DCV MAX.
MIDDLE
DCV SET
MIDDLE
ENTHALPY
C SETTING
(ACCESSORY)
REMOTE MIN
POSITION POT
REMOTE POT (135 ohm)
PNK
(FIOP / ACCESSORY)
IAQ SENSOR
2
8
BLK
BRN
1
BLU
7
OAT TEMP /
RED
ENTHALPY SENSOR
BLK
RED
(ACCESSORY)
RAT/ENTHALPY SENSOR
+
5
ECONOMIZER NOTES:
1. 620 OHM, 1 WATT 5% RESISTOR SHOULD BE REMOVED ONLY WHEN
USING DIFFERENTIAL ENTHALPY OR DRY BULB.
2. IF A SEPARATE FIELD SUPPLIED 24V TRANSFORMER IS USED FOR THE
IAQ SENSOR POWER SUPPLY, IT CANNOT HAVE THE SECONDARY OF THE
TRANSFORMER GROUNDED.
3. FOR FIELD INSTALLED REMOTE MINIMUM POSITION POT.
REMOVE BLACK WIRE JUMPER BETWEEN P AND P1 AND SET
CONTROL MINIMUM POSITION POT TO THE MINIMUM POSITION.
HORIZONTAL INSTALLATION
These economizers are designed to work in both vertical and
horizontal applications. These instructions are for a horizontal
application.
The unit has a horizontal duct opening next to the horizontal
supply duct opening. However, in this application, with an
economizer, the horizontal duct will actually come into the unit
underneath the outdoor air hood. (See Fig. 16.)
1.
Turn off unit power supply and install lockout tag.
2.
Prepare the unit for economizer installation:
a. For units with 2 position damper installed, remove the
outside air hood. Unplug the damper actuator and
remove assembly from unit.
b. For units with manual damper installed, remove the
manual damper and hood.
3.
Remove the upper panel and bottom panel (provided with the
HVAC unit). On the end of the unit to expose the return
section. (See Fig. 17.) Save the screws for use later when
replacing the panel. The panels can be discarded.
4.
Remove the unit's left side corner post and left side panel
from the unit to allow for easy economizer installation. (See
Fig. 18.)
ECONOMIZER (FIOP / ACCESSORY)
PNK
VIO
BRN
RED
N1
EXH
SET
N
10V
BLK
2V
P1
EXH
P
T1
MIN
VIO
T
POS
OPEN
RED
BRN
DCV
MAX
2V
10V
DCV
AQ1
DCV
AQ
SET
SO+
SO
2V
10V
SR+
FREE
COOL
SR
B
C
620Ω
D
A
Economizer
Fig. 15 — Economizer Wiring Diagram
RED
TR1
TR
ECONOMIZER
MOTOR
BRN
3
2
1
BRN
RED
24
Vac
24Vac
BLK
HOT
COM
WHT
-
+
1
2
GRA
5
GRA
YEL
3
4
ORN
LA
EF
EF1
BLU
TAN
TO PWR EXHAUST
ACCESSORY
NOTE: The unit's left side panel has a duct opening in it, but this
panel / duct opening will not be used in this application and can be
discarded.
5.
Install economizer, as shown in Fig. 19, into the return air
section of the unit. Be careful not to pinch the wires during
installation. Bottom of economizer will rest on the base of the
unit. (See Fig. 20.)
6.
Reinstall the left side corner post on to the unit. Note the
corner post will sit behind the economizer flange. (See
Fig. 21.) Screw through the corner post and through the
economizer. (See Fig. 21 and 22.)
7.
Insert provided screw through the bottom left rear of the
economizer and into the unit base. (See Fig. 20.) Install the
new (provided) left side panel - without the duct opening on
the unit.
8.
Before the economizer is secured in place on the right hand
side, remove and save the 12-pin jumper plug from the unit
wiring harness. Insert the EconoMi$er IV plug into the unit
wiring harness plug. (See Fig. 23.)
NOTE: The 12-pin jumper plug should be saved for future use in
the event that the EconoMi$er IV assembly is removed from the
unit. The jumper plug is not needed as long as the EconoMi$er IV
assembly is installed.
8
PNK
PL6 - R
FOR STD
UNIT
PL6
VIO
7
7
7
6
6
6
11
(NOT USED)
11
11
10
(NOT USED)
10
10
8
YEL
8
8
2
2
2
3
BLK
3
3
4
BRN
4
4
1
RED
RED
1
1
5
GRA
5
5
9
ORN
ORN
9
9
12
(NOT USED)
12
12
Unit Without Economizer
(FIOP / ACCY)
ECONOMIZER
PNK
BLU
SAT
VIO
BLU
YEL
BLU
BLK
BRN
GRA
GRA
GRA
ESL
PNK
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