Carrier CRECOMZR101A00 User manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480416-01 Printed in U.S.A. Form No. IIK-CRECON-SRT-01 Rev. C Pg 1 1-24 Replaces: NEW
Installation Instructions
Part No: CRECOMZR101A00, CRECOMZR102A00, CRECOMZR103A00,
CRECOMZR104A00, CRECOMZR105A00, CRECOMZR106A00,
CRECOMZR107A00, CRECOMZR108A00
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ECONOMIZER INSTALLATION . . . . . . . . . . . . . . . . . 4
INSTALLING OPTIONAL HH57LW001 SINGLE
OUTSIDE AIR ENTHALPY SENSOR . . . . . . . . . . 10
Enthalpy Control Sensor Configuration . . . . . . . . . 10
• ENTHALPY SETTINGS (ENTHALPY OPTION)
California’s Title 24 High Temperature 
Limit Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ECONOMIZER SETTINGS . . . . . . . . . . . . . . . . . . . . . 14
Interface Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 14
• ECONOMIZERONE
• POL 224 ECONOMIZER MODULE WIRING
Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
• FREE COOLING ECONOMIZING
• DEFAULT HYSTERESIS SETTING
• DAMPER MODULATION DURING FREE COOLING
• LOCATION-BASED SHUTOFF SETPOINTS
• COOLING STAGE OPERATION
• MULTI-SPEED FAN SUPPORT
• COOLING DELAY VIA INCREASING FAN SPEED
• DEMAND CONTROLLED VENTILATION (DVC)
• HIGH HUMIDITY LIMITATION
• ANTI-FREEZE PROTECTION
• MAT-BASED ANTI-FREEZE PROTECTION
• OAT-BASED ANTI-FREEZE PROTECTION
• EXHAUST FAN OPERATION
• OCCUPANCY INPUT
• PRE-OCCUPANCY PURGE
• AIRFLOW COMMISSIONING
• FAULT DETECTION AND DIAGNOSTICS
• FIRMWARE UPDATE
MOUNTING, INSTALLATION, AND WIRING . . . . . . 20
Mounting the Economizer Controller Base
Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Mounting Devices Connected To the Economizer
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Connecting Peripheral Devices to the Economizer
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
SETUP AND CONFIGURATION . . . . . . . . . . . . . . . . 24
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Cooling with EconomizerONE System . . . . . . . . . . 29
Heating with EconomizerONE System . . . . . . . . . . 29
APPENDIX A — TROUBLESHOOTING . . . . . . . . . . . 30
APPENDIX B — SEQUENCE OF OPERATION . . . . .31
APPENDIX C — MODBUS ADDRESSES . . . . . . . . . .34
SAFETY CONSIDERATIONS
Installation of this accessory can be hazardous due to system
pressures, electrical components, and equipment location (such as
a roof or elevated structure). Only trained, qualified installers and
service technicians should install, start-up, and service this
equipment.
When installing this accessory, observe precautions in the
literature, labels attached to the equipment, and any other safety
precautions that apply:
• Follow all safety codes
• Wear safety glasses and work gloves
• Use care in handling and installing this accessory
It is important to recognize safety information. This is the safety-
alert symbol: . When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
CAUTION
PERSONAL INJURY HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing, safety glasses and gloves
when handling parts and servicing air conditioning equipment.
CAUTION
PERSONAL INJURY HAZARD
Failure to follow this caution can result in personal injury and
damage to the unit.
Cover the duct opening as a precaution so objects cannot fall
into the return duct opening. Be sure to remove the cover when
installation is complete.
Vertical/Horizontal Low Leak/Ultra Low Leak
EconomizerONE Accessory for
Small Rooftop Units
Select 3 to 12.5 Tons

2
GENERAL
The EconomizerONE system utilizes the latest technology
available for integrating the use of free cooling with mechanical
cooling for packaged rooftop units. The solid-state control system
optimizes energy consumption, zone comfort, and equipment
cycling by operating the compressors when the outdoor air tem-
perature is too warm, integrating the compressor with outdoor air
when free cooling is available, and locking out the compressor
when outdoor air temperature is too cold. Demand controlled ven-
tilation is supported. The EconomizerONE system can be used
with 1 and 2-speed units.
The EconomizerONE system utilizes gear-drive technology with a
direct-mount spring return actuator that will close upon loss of
power. The EconomizerONE system comes standard with an out-
door air temperature sensor, mixed air temperature sensor (also
called supply air temperature sensor). Outdoor enthalpy, indoor
(return) dry bulb or enthalpy, and CO2sensors are available for
field installation. Standard barometric relief dampers provide nat-
ural building pressurization control. An optional power exhaust
system is available for applications requiring even greater exhaust
capabilities. The power exhaust set point is adjustable at the
EconomizerONE controller. See Table 1and 2for package usage.
See Tables 3and 4for package contents. See Table 5for sensor
usage.
Compliance
Economizers meet California Energy Commission Title 24-2013/
2016 prescriptive section 140.4 (damper leakage etc.), and manda-
tory section 120.2.i for Fault Detection and Diagnostic controls
(HJW10). Economizers meet ASHRAE 90.1-2013/2016 damper
leakage requirements as stated in Section 6.5.1.1.4 and
Table 6.4.3.4.3, and meet 2016 Fault Detection and Diagnosis
requirements in section 6.4.3.12. Economizers meet IECC 2012
section C402.4.5.2 and, IECC 2015 sections C403.2.4.3 and
C403.3.3.5 for outside air, and return air damper leakage require-
ments, and IECC 2015 section C403.2.4.7 for Fault Detection and
Diagnostic requirements. NOTE: IECC 2015 section C403.2.4.7.1
requires differential return air sensor, which must be ordered
separately. Outside air and return air (volume) dampers are
AMCA rated.
DANGER
ELECTRICAL SHOCK HAZARD
Failure to follow this warning will result in personal injury or
death.
Before performing service or maintenance operations on unit,
turn off main power switch to unit and install lock(s) and
lockout tag(s). Ensure electrical service to rooftop unit agrees
with voltage and amperage listed on the unit rating plate. Unit
may have more than one power switch.
IMPORTANT: Read these instructions completely before
attempting to install the accessory economizer.
Table 1 — Economizer Usage — Vertical Units
EconomizerONE
ACCESSORY
KIT NUMBER
MODEL NUMBER
SMALL CABINET UNITS
CRECOMZR101A00 (LL),
CRECOMZR103A00 (ULL)
48FC/50FC/50FCQ 04-07
48GC/50GC/50GCQ 04-06
582K/559K/547K 04-07
581K/551K/549K 04-06
RGV/RAV/RHV 036-072
RGW/RAW/RHW 036-060
LARGE CABINET UNITS
CRECOMZR105A00(LL),
CRECOMZR107A00 (ULL)
48/50FC 08-14
50FCQ 08-12
48/50GC 07-12
50GCQ 07-09
582K/559K 08-14
547K 08-12
581K/551K 07-12
549K 07-09
RAV/RGV 090-150
RHV 090-120
RAW/RGW 072-120
RHW 072-102
LEGEND
LL — Low Leak Economizer
ULL — Ultra-Low Leak Economizer
Table 2 — Economizer Usage — Horizontal Units
EconomizerONE
ACCESSORY
KIT NUMBER
MODEL NUMBER
SMALL CABINET UNITS
CRECOMZR102A00 (LL),
CRECOMZR104A00 (ULL)
48FC/50FC/50FCQ 04-07
48GC/50GC/50GCQ 04-06
582K/559K/547K 04-07
581K/551K/549K 04-06
RGV/RAV/RHV 036-072
RGW/RAW/RHW 036-060
LARGE CABINET UNITS
CRECOMZR106A00 (LL)
48/50FC 08-14
50FCQ 08-12
48/50GC 07-12
50GCQ 07-09
582K/559K 08-14
547K 08-12
581K/551K 07-12
549K 07-09
RGW/RAW 072-120
RHW 072-102
RGV/RAV 090-150
RHV 090-120
CRECOMZR108A00(ULL)
48/50FC 08-14
582K/559K 08-14
RGV/RAV 090-150
LEGEND
LL — Low Leak Economizer
ULL — Ultra-Low Leak Economizer

3
Table 3 — Package Contents — Vertical Units
EconomizerONE
ACCESSORY KIT
NUMBER
QTY DESCRIPTION
CRECOMZR101A00
(LL)
1
48TM000562 Low Leak Vertical
Economizer with HF23BL004 Actuator
Motor and 48TC004997 Economizer
harness plug
148TC006123 Hood Assembly with
50HJ540574 Aluminum Filter
1
Hardware Package contains one each
of the following:
- HH63LW001 POL 224 Economizer
Controller
- 48TC005897 POL 224 Economizer
Harness
- HH79NZ039 Dry Bulb Temperature
Sensor Assembly
CRECOMZR103A00
(ULL)
1
48TC004998 Ultra Low Leak Vertical
Economizer with HF23BL005 Actuator
Motor and 48TC004997 Economizer
harness plug
148TC006123 Hood Assembly with
50HJ540574 Aluminum Filter
1
Hardware Package contains one each
of the following:
- HH63LW001 POL 224 Economizer
Controller
- 48TC005897 POL 224 Economizer
Harness
- HH79NZ039 Dry Bulb Temperature
Sensor Assembly
CRECOMZR105A00
(LL)
1
48TM007424 Low Leak Vertical
Economizer with HF23BL005 Actuator
Motor and 48TC004997 Economizer
harness plug
148TM404600 Hood Assembly with
50HJ540575 Aluminum Filter
1
Hardware Package contains one each
of the following:
- HH63LW001 POL 224 Economizer
Controller
- 48TC005897 POL 224 Economizer
Harness
- HH79NZ039 Dry Bulb Temperature
Sensor Assembly
CRECOMZR107A00
(ULL)
1
48TM007423 Ultra Low Leak Vertical
Economizer with HF23BL005 Actuator
Motor and 48TC004997 Economizer
harness plug
148TC004600 Hood Assembly with
50HJ540575 Aluminum Filter
1
Hardware Package contains one each
of the following:
- HH63LW001 POL 224 Economizer
Controller
- 48TC005897 POL 224 Economizer
Harness
- HH79NZ039 Dry Bulb Temperature
Sensor Assembly
LEGEND
LL — Low Leak Economizer
ULL — Ultra-Low Leak Economizer
Table 4 — Package Contents — Horizontal Units
EconomizerONE
ACCESSORY KIT
NUMBER
QTY DESCRIPTION
CRECOMZR102A00
(LL)
1
48TM006055 Low Leak Horizontal
Economizer with HF23BL005 Actuator
Motor and 48TC004997 Economizer
harness plug
148HC400238 Hood Assembly with
50HJ540610 Aluminum Filter
1
Hardware Package contains one each
of the following:
- HH63LW001 POL 224 Economizer
Controller
- 48TC005897 POL 224 Economizer
Harness
- HH79NZ039 Dry Bulb Temperature
Sensor Assembly
CRECOMZR104A00
(ULL)
1
48TC006054 Ultra Low Leak Horizontal
Economizer with HF23BL005 Actuator
Motor and 48TC004997 Economizer
harness plug
148TC006056 Hood Assembly with
50HJ540610 Aluminum Filter
1
Hardware Package contains one each
of the following:
- HH63LW001 POL 224 Economizer
Controller
- 48TC005897 POL 224 Economizer
Harness
- HH79NZ039 Dry Bulb Temperature
Sensor Assembly
CRECOMZR106A00
(LL)
1
48TM009243 Low Leak Horizontal
Economizer with HF23BL005 Actuator
Motor and 48TC004997 Economizer
harness plug
148TM404543 Hood Assembly with
50HJ540611 Aluminum Filter
1
Hardware Package contains one each
of the following:
- HH63LW001 POL 224 Economizer
Controller
- 48TC005897 POL 224 Economizer
Harness
- HH79NZ039 Dry Bulb Temperature
Sensor Assembly
CRECOMZR108A00
(ULL)
1
48TM009244 Ultra Low Leak Horizontal
Economizer with HF23BL005,Actuator
Motor and 48TC004997 Economizer
harness plug
148TM008114 Hood Assembly with
50HJ540611 Aluminum Filter
1
Hardware Package contains one each
of the following:
- HH63LW001 POL 224 Economizer
Controller
- 48TC005897 POL 224 Economizer
Harness
- HH79NZ039 Dry Bulb Temperature
Sensor Assembly
LEGEND
LL — Low Leak Economizer
ULL — Ultra-Low Leak Economizer

4
ECONOMIZER INSTALLATION
Figure 1shows component locations on the EconomizerONE
system.
Fig. 1 — EconomizerONE Component Locations
(CRECOMZR108A00 Shown)
1. Turn off unit power supply and install lockout tag.
2. Remove the existing unit filter access panel. Raise the panel
and swing the bottom outward. The panel is now disengaged
from the track and can be removed. (See Fig. 2.)
3. Remove the indoor coil access panel. (See Fig. 2.)
NOTE: Save the filter access and indoor coil access panels
for future use in the event that the EconomizerONE assembly
is ever removed.
4. For vertical installations — Slide the EconomizerONE
assembly into the unit as shown in Fig. 3. Be sure to engage
the rear EconomizerONE flange under the tabs on the unit
base in the Return Air opening as shown in Fig. 4. Continue
at Step 8.
5. For horizontal installations — Locate Mixed Air Temperature
Switch (MTS) with its bracket on left side of the unit.
Remove left filter to access MTS bracket screws. Remove
screws and relocate the bracket with MTS on the next set of
holes up, having the bracket now above the opening of the fil-
ter access opening.
See Fig. 5for the following 6 and 7.5 ton units:
- 48/50FC 08, 50FCQ 08, 48/50GC 07, 50GCQ 07
- 582K/559K 08, 547K 08, 581K/551K 07, 549K 07
- RAV/RGV 090, RHV 090, RAW/RGW 072, RHW 072
See Fig. 6for the following 7.5 to 12.5 ton units:
- 48/50FC 09-14, 50FCQ 09-12, 48/50GC 08-12,
50GCQ 08-09
- 582K/559K 09-14, 547K 09-12, 581K/551K 08-12,
549K 08-09
- RAV/RGV 102-150, RHV 102-120, RAW/RGW 090-120,
RHW 090-102
6. Slide the EconomizerONE assembly all the way back and
into the horizontal R/A (Return Air) opening. (See Fig. 7.)
7. Attach O/A (Outside Air) panel, included in O/A hood kit,
over the panel opening, then lift the economizer. Match the
ID (inside dimension) of the panel with the ID of the econo-
mizer, then attach using provided screws. (See Fig. 8.)
8. If the EconomizerONE system will be operating with an
enthalpy outside air sensor, then remove the factory installed
HH79NZ039 dry bulb sensor from the front face of the econ-
omizer (see Fig. 1), and install the accessory enthalpy sensor
HH57LW001 in the same location. Connect the (5) wire har-
ness with plug from the EconomizerONE assembly to the
enthalpy sensor. See page 9 for wiring diagram. Refer to
“INSTALLING OPTIONAL HH57LW001 SINGLE OUT-
SIDE AIR ENTHALPY SENSOR” on page 10 section for
more details on enthalpy settings.
9. Remove and save the 12-pin jumper plug from the unit econ-
omizer harness located in the upper left corner of the unit.
Insert the EconomizerONE plug into the unit wiring harness.
(See Fig. 9.)
NOTE: The 12-pin jumper plug should be saved for future
use, in the event that the EconomizerONE assembly is ever
removed. The jumper plug is not needed as long as the Econ-
omizerONE is installed.
Fig. 2 — Filter Access View
10. For vertical installations — Install the outside air hood over
the economizer in place through pre-punched holes. Reinstall
the unit’s filter access panel. Continue at Step 16.
For horizontal hood installation see Steps 11-15.
Table 5 — EconomizerONE Sensor Usagea
NOTE(S):
a. Dry Bub sensor HH79NZ039 is included in the kit. Dry Bulb sensor
HH57LW001 can be used as a replacement part.
APPLICATION
EconomizerONE WITH OUTDOOR
AIR DRY BULB SENSOR
(ACCESSORIES REQUIRED)
Outdoor Air Dry Bulb
The HH79NZ039 outdoor air dry bulb
sensor is factory installed on the
economizer.
Mixed Air Sensor
HH79NZ039 provided with
economizer and field-installed in
blower compartment.
Single Enthalpy Sensor HH57LW001
Differential Dry Bulb Or
Enthalpy HH57LW001 (Qty. 2 required)
CO2for DVC Control using a 
Wall-Mounted CO2Sensor
33ZCSPTCO2LCD-01 or
33ZCSPTCO2-01 or
CRCBDIOX005A003
CO2for DVC Control using a 
Duct-Mounted CO2Sensor
33ZCSPTCO2LCD-01 or
33ZCSPTCO2-01
Actuator
HH79NZ039
Outside Air
Temperature
Sensor
Outside Air
Damper
Wiring
Harness
Filter Access Panel
Indoor Coil Access Panel

5
Fig. 3 — Vertical Economizer installed in R/A Section
Fig. 4 — Rear EconomizerONE Flange installation for
Vertical Units
Fig. 5 — Mixed Air Temperature Switch Relocation
for Select 6 and 7.5 Ton Horizontal Units
Fig. 6 — Mixed Air Temperature Switch Relocation
for Select 7.5 to 12.5 Ton Horizontal Units
Fig. 7 — Horizontal Economizer Installed in R/A
Section
Fig. 8 — Attach O/A Panel
Wiring
Harness
EconomizerONE
HVAC Unit Filters
Insert Screw in
EconomizerONE
Flanges
Unit Filter
Rack
EconomizerONE
Hold Down Tab
Unit Base EconomizerONE
EconomizerONE Rear Flange
See Detail A
Detail A
Factory
Location
New Location
See Detail A
Detail A
Factory
Location
New Location
Economizer
O/A Panel

6
Fig. 9 — Connect EconomizerONE Harness to Unit
PL6 Economizer Harness
NOTE: Steps 11-15 apply to horizontal units only.
11. Attach filter panel above O/A panel. Slide under RTU (Pack-
aged Rooftop Unit) top flange then drop down until bottom
mount holes align with top holes on O/A panel. Fasten with
provided sheet metal screws. (See Fig. 10.)
12. Install the O/A hood to the O/A panel over the Economizer
assembly. Use screws provided. (See Fig. 10.)
13. Attach the R/A blank off panel, included with horizontal
economizers for large units only (see Table 2). See Fig. 11.
Grommet must be installed before duct work is installed.
14. Attach the O/A hood assembly to the O/A panel with
included screws. (See Fig. 10.)
15. Install provided barometric relief hood on field installed R/A
duct ensuring it is water tight. (See Fig. 12.)
16. Remove the indoor blower access panel and the panel(s) cov-
ering the unit control box. (See Fig. 13.) In the hardware kit
provided with the EconomizerONE is the POL 224 control-
ler. Mount the controller assembly on the left side of the unit
control box. Screw controller to the control box through pre-
punched holes in control box. (See Fig.14.)
17. Unplug the 12-pin female ECON plug currently connected to
the Unit Control Board (UCB). (See Fig. 15.)
18. Connect the 12-pin female ECON plug removed from the
UCB to the 12-pin male plug from the controller harness.
Refer to Fig. 16 and wiring diagram on page 9.
Fig. 10 — Attach Filler Panel and Hood
Fig. 11 — Attach R/A Blank Off Panel
Fig. 12 — Attach Relief Damper Hood Assembly to
Return Duct
Fig. 13 — Typical Indoor Fan Motor Access Panel
Locations
Rooftop Unit’s
12-Pin Male Plug
EconomizerONE
12-Pin Female Plug
Filter Panel
Filter Access
R/A Blank Off Panel
Attach R/A blank off
using 4 screws provided.
Ductwork not shown.
Unit Control
Box Panel(s)
Center Post
Indoor Blower
Access Panel

7
Fig. 14 — Mount Controller Assembly in Unit Control Box
Fig. 15 — Unplug ECON plug from Unit Control Board Fig. 16 — Connect 12-pin Plugs Together
EconomizerONE
(POL 224) Controller

8
19. Connect the 12-pin female plug from the controller harness to
ECON on the UCB. Refer to Fig. 17 and wiring diagram on
page 9.)
Fig. 17 — Connect 12-Pin Plug to
Unit Control Board
20. Connect the brown wire from the controller harness to the
UCB. Refer to economizer wiring diagram on page 9. The
brown wire connects to “C”, on the UCB.
21. Locate the 4 wires labeled (Supply Air Thermostat) SAT and
(Outdoor Air Thermostat) OAT, connected to the controller
harness.
22. Route the 4 wires through the divider between the control box
and the indoor blower section. (See Fig. 18.)
23. The supply air temperature sensor may look like an eyelet ter-
minal with wires running to it (HH79NZ039). The sensor is
located on the “crimp end” and is sealed from moisture.
Mount the supply air temperature sensor (provided) to the fan
deck, near the right hand side corner post. Connect the sensor
red and black wires to the orange and brown wires from the
controller. (See Fig.18.)
24. Connect the pink and violet wires routed from the controller
harness to the pink and violet terminals in the wire bundle in
the indoor blower section. (See Fig. 19.)
25. If using differential return sensor or (demand controlled ven-
tilation) DCV sensor, install this now. Refer to Table 7 for
Sensor Usage and Table 6 for Enthalpy Manual Entry Set-
points details. Refer to page 18 for Damper settings. See
installation details on page 18.
26. Re-install the Indoor blower access panel. (See Fig. 13.)
27. After powering unit controller, program the POL 224 control-
ler. After all settings have been made, re-install the unit con-
trol box panel. (See Fig. 13.)
28. Install the filter by opening the filter clips which are located
underneath the hood top. Insert the aluminum filter into the
bottom filter rack (hood divider). Push the filter into position
past the open filter clips. Close the filter clips to lock the filter
into place. (See Fig. 20.)
Economizer performance charts are shown in Fig. 21 and 22
on page 10. See base unit installation manual to make adjust-
ments to meet building ventilation requirements.
Fig. 18 — Supply Air Sensor Installation POL 224 (Vane Axial Fan System)
To Control Box
ORG
BRN
SAT Ring Terminal Ref
PL6 Ref
Bundle these
connections
into the corner
post with wire tie.
PNK
VIO
VIO
PNK
RED
BLK
PL6
Control
Box

9
Fig. 19 — Economizer Wiring Diagram

10
Fig. 20 — EconomizerONE Hood Detail
Fig. 21 — Barometric Relief Flow Capacity
Fig. 22 — Return Air Pressure Drop
INSTALLING OPTIONAL HH57LW001 SINGLE
OUTSIDE AIR ENTHALPY SENSOR
When using the HH57LW001 enthalpy sensor (see Fig. 26) for
outside air changeover, the existing HH79NZ039 dry bulb sensor
(see Fig. 25) must be removed. The enthalpy sensor will be
mounted in the same location as the dry bulb sensor (see Fig. 1).
When the enthalpy sensor's OA (Outside Air) temperature, enthal-
py and dew point are below the respective setpoints, the outside
air can be used for free-cooling. When any of these are above the
setpoint, free-cooling will not be available. Enthalpy setpoints are
configurable and create an enthalpy boundary according to the us-
er's input. For additional details see Fig. 23-24 and Table 6.
Harness 48TC005213 is required to be connected between the
EconomizerONE harness in the return air chamber. Harness
48TC005213 has a 5 pin plug that connects directly to the
HH57LW001 enthalpy sensor.
Enthalpy Control Sensor Configuration
The optional enthalpy control sensor (Part No.: HH57LW001)
communicates with the POL 224 economizer controller using the
five-wire harness, 48TC005213. The HH57LW001 sensor can be
used as a single outside air enthalpy, a differential return enthalpy,
or a differential return temperature sensor. See Fig. 19 for wiring
the HH57LW001 enthalpy sensor for each option. Use Fig. 26 and
Table 8on page 13 to locate the wiring terminals for each enthalpy
control sensor.
Hood
Aluminum
Filter
Filter
Clip
B
A
Relief Air
Outside Air
Cleanable
Aluminum Filter
0
1000
2000
3000
4000
5000
6000
7000
8000
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
RELIEF FLOW (cfm)
RETURN DUCT STATIC PRESSURE (in.wg)
0
1000
2000
3000
4000
5000
6000
7000
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4
RETURN AIR FLOW (cfm)
RETURN AIR PRESSURE DROP (in.wg)

11
Fig. 23 — U.S. and Canada Climate Zones
Fig. 24 — California Title 24 Zones
Climate Zone 1
Climate Zone 2
Climate Zone 3
Climate Zone 4 (Except Marine)
Climate Zone 5 and Marine
Climate Zone 6
Climate Zone 7 and 8
U.S. and Canada I-Codes / ASHRAE Zones
16
16
16
15
15
14
14
10
7
8
9
6
5
4
3
13
12
11
2
1

12
Economizers are shipped standard with an HH79NZ039 outside
air dry bulb sensor (see Fig. 25). System default setting (high temp
limit) is 63°F (17°C), and has a range of 48°F to 80°F (9°C to
27°C). Sensor is factory installed on economizer.
NOTE: A second HH79NZ039 sensor is provided for mixed air
temperature.
NOTE: California high temperature setting requirements by
region are shown in Table 7.
ENTHALPY SETTINGS (ENTHALPY OPTION)
If installing the optional HH57LW001 enthalpy sensor, then the
HH79NZ039 dry bulb outside air sensor must first be removed.
Wire sensor to harness 48TC005213 and the (5) wires from the
harness to the EconomizerONE harness in the return air chamber.
Harness 48TC005213 has a 5 pin plug that connects directly to the
HH57LW001 enthalpy sensor. See Fig. 19 for wiring connections.
Refer to Fig. 26 and Table 8.
California’s Title 24 High Temperature
Limit Settings
California’s Title 24 code requires a high temperature limit setting
for all dry bulb outside air economizer changeover. The tempera-
tures vary by the region within California. See Table 7for high
limit settings.
Table 6 — Enthalpy Manual Entry Setpoints for EconomizerONE Per Climate Zone
CLIMATE ZONESa2 TEMP OFF Lowest
Setting RH% 2 ENTH OFF RH% 2THL 2EHL RH%
165°F 22 Btu/lbm 43% 28 Btu/lbm 86% 83°F 33 Btu/lbm 48%
265°F 22 Btu/lbm 43% 28 Btu/lbm 86% 83°F 33 Btu/lbm 48%
365°F 22 Btu/lbm 43% 28 Btu/lbm 86% 83°F 33 Btu/lbm 48%
465°F 22 Btu/lbm 43% 28 Btu/lbm 86% 83°F 33 Btu/lbm 48%
570°F 22 Btu/lbm 28% 28 Btu/lbm 65% 83°F 33 Btu/lbm 48%
670°F 22 Btu/lbm 28% 28 Btu/lbm 65% 83°F 33 Btu/lbm 48%
7 & 8 75°F 22 Btu/lbm 19% 28 Btu/lbm 50% 83°F 33 Btu/lbm 48%
CALIFORNIA
TITLE 24 ZONESb2 TEMP OFF Lowest
Setting RH% 2 ENTH OFF RH% 2THL 2EHL RH%
175°F 22 Btu/lbm 19% 28 Btu/lbm 50% 83°F 33 Btu/lbm 48%
273°F 22 Btu/lbm 22% 28 Btu/lbm 55% 83°F 33 Btu/lbm 48%
375°F 22 Btu/lbm 19% 28 Btu/lbm 55% 83°F 33 Btu/lbm 48%
473°F 22 Btu/lbm 22% 28 Btu/lbm 55% 83°F 33 Btu/lbm 48%
575°F 22 Btu/lbm 19% 28 Btu/lbm 50% 83°F 33 Btu/lbm 48%
671°F 22 Btu/lbm 28% 28 Btu/lbm 62% 83°F 33 Btu/lbm 48%
769°F 22 Btu/lbm 32% 28 Btu/lbm 68% 83°F 33 Btu/lbm 48%
871°F 22 Btu/lbm 28% 28 Btu/lbm 62% 83°F 33 Btu/lbm 48%
971°F 22 Btu/lbm 28% 28 Btu/lbm 62% 83°F 33 Btu/lbm 48%
10 73°F 22 Btu/lbm 22% 28 Btu/lbm 55% 83°F 33 Btu/lbm 48%
11 75°F 22 Btu/lbm 19% 28 Btu/lbm 50% 83°F 33 Btu/lbm 48%
12 75°F 22 Btu/lbm 19% 28 Btu/lbm 50% 83°F 33 Btu/lbm 48%
13 75°F 22 Btu/lbm 19% 28 Btu/lbm 50% 83°F 33 Btu/lbm 48%
14 75°F 22 Btu/lbm 19% 28 Btu/lbm 50% 83°F 33 Btu/lbm 48%
15 75°F 22 Btu/lbm 19% 28 Btu/lbm 50% 83°F 33 Btu/lbm 48%
16 75°F 22 Btu/lbm 19% 28 Btu/lbm 50% 83°F 33 Btu/lbm 48%
Controller Default
Settings 2 TEMP OFF — — 2 ENTH OFF — 2THL 2EHL RH%
Default Set Points 63°F — — 28 Btu/lbm 94% 83°F 33 Btu/lbm 48%
NOTE(S):
a. See Fig. 19 for map of U.S. and Canada climate zones.
b. See Fig. 20 for map of California Title 24 zones
Table 7 — California Title 24 Regional High Limit Dry
Bulb Temperature Settingsa
DEVICE TYPEbCLIMATE
ZONES
REQUIRED HIGH LIMIT
(ECONOMIZER OFF WHEN):
DESCRIPTION
FIXED DRY
BULB
1, 3, 5, 11-16 OAT exceeds 75°F
2, 4, 10 OAT exceeds 73°F
6, 8, 9 OAT exceeds 71°F
7 OAT exceeds 69°F
DIFFERENTIAL
DRY BULB
1, 3, 5, 11-16 OAT exceeds
RA temperature
2, 4, 10 OAT exceeds return air temperature
–2°F
6, 8, 9 OAT exceeds return air temperature
–4°F
7OAT exceeds return air temperature
–6°F
FIXED
ENTHALPYc
+ FIXED DRY
BULB
All OAT exceeds 28 Btu/lb of dry airb or
OAT exceeds 75°F
NOTE(S):
a. This table sourced from 2019 California Energy Code, Title 24, Part 6, Table
140.4-E Air Economizer High Limit Shut Off Control Requirements.
b. Only the high limit control devices listed are allowed to be used and at the set
points listed. Others such as Dew Point, Fixed Enthalpy, Electronic Enthalpy,
and Differential Enthalpy Controls, may not be used in any climate zone for
compliance with Section 140.4(e)1 unless approval for use is provided by the
Energy Commission Executive Director.
c. At altitudes substantially different than sea level, the Fixed Enthalpy limit value
shall be set to the enthalpy value at 75°F and 50% relative humidity. As an ex-
ample, at approximately 6,000 foot elevation, the fixed enthalpy limit is approx-
imately 30.7 Btu/lb
LEGEND
OAT — Outdoor-air Thermostat
RA — Return Air

13
Fig. 25 — HH79NZ039 Dry Bulb and Mixed Air Sensor Wiring
Fig. 26 — HH57LW001 Dimensional, Connection and Switching information
Table 8 — HH57LW001 Sensor Wiring Terminations
TERMINAL TYPE DESCRIPTION
NUMBER LABEL
1TCOM NTC 10k Outside Air Temperature Sensor Output
2TSIG NTC 10k Outside Air Temperature Sensor Output
3HSIG 0-10 vdc Outside Air Relative Humidity Sensor Output
4HCOM COMMON Sensor 24-v Common Input
5H24V 24 vac Sensor 24-v Operating Voltage Input

14
ECONOMIZER SETTINGS
Interface Overview
ECONOMIZERONE
The field-installed accessory consists of the following:
• Low Leak Economizer Assembly
• HH79NZ039 OA Dry Bulb Sensor
• HH79NZ039 Mixed Air Sensor
• POL 224 Controller
• 48TC005897 Harness
POL 224 ECONOMIZER MODULE WIRING
The economizer controller used on electromechanical units is a
Siemens POL 224 which is to be located the RTU base unit’s con-
trol box. See Fig. 27 for button description of the POL 224 con-
troller. See the Installation Instruction for the base unit location of
the control box access panel. Refer to Fig. 13.
The POL 224 controller provides the following:
1. One-line LCD — After a period of inactivity, the controller
displays the default HMI screen (free cooling status,
1FREE-COOL YES or 1FREE COOL NO). See Fig. 27-31.
2. Operation button (Up button) — Move to the previous value,
step, or category.
3. Operation button (Down Button) — Move to the next value,
step, or category.
4. Operation Button (Enter Button):
a. Press Enter to edit the current value or option.
b. Press Enter to confirm a newly selected value or option.
c. Press Enter + Up to jump up one entire category.
d. Press Enter + Down to jump down one entire category.
User Interface and Keypad
The controller user interface consists of an LCD display and a
3-button keypad for input. The LCD is a 16 character by 1-line dot
matrix display. The keypad is used to navigate and change the de-
sired menu items on the display. See Fig. 27.
The Climatix™1 mobile application allows for installation, com-
missioning, and servicing. Scanning a QR code on the controller
allows users to download the Climatix™mobile application on
Android™1or Apple iOS®1, but a Wi-Fi/WLAN stick is needed.
See Fig. 27 and 28. Plug Wi-Fi/WLAN stick into controller USB
port for temporary connection for mobile application setup. Each
Wi-Fi/WLAN stick can be used for multiple units.
Menu Structure
Menus are displayed in the economizer controller as per
categories. There are eight first-level menus, each of which is rep-
resented by a number at the beginning of the line on the LCD.
Pressing Enter + Up or Down can toggle between different first-
level menus. Submenus follow the numbered first-level menus
closely. Pressing Up or Down can toggle between different
submenus.
At the end of the line, the LCD displays the value of the current
submenu (if any). If the value is editable, then pressing Enter will
put terminal in the Edit mode. The value is then highlighted for
change. After making a change by pressing Up or Down, press
Enter to confirm the change and exit the Edit mode. See Fig. 30.
Powering the Economizer Controller
Connect a 24 vac external power supply source to the following
terminals to power the economizer controller. See Fig. 29.
LED indication
NOTE: If different faulty events occur at the same time, then
sensor/DAC LED lights up following the priority below: Red 
Yellow Off. For example, if there is a humidity sensor error
and air temperature failure at the same time, then the sensor
LED turns red rather than yellow. See Fig. 31 and Table 9.
Fig. 27 — POL 224 Controller
Fig. 28 — Wi-Fi/WLAN Stick
1. Third-party trademarks and logos are the property of their respective
owners.
IMPORTANT: After the Economizer controller enters the
running state, it may take one minute for peripheral devices to
complete initialization. Before that, LED indication might be
unstable.
12 3
4
5
6
NOTE: QR codes in this image are for reference only.
NO. DESCRIPTION
1USB port for Wi-Fi/WLAN stick
2QR code to download Climatix™mobile application
3
One-line LCD. After a period of inactivity, the controller
displays the default
HMI screen (free cooling status, 1FREECOOL YES or
1FREECOOL NO)
4Operation button (Up button) — Move to the previous
value, step, or category
5Operation button (Down button) — Move to the next
value, step, or category
6
Operation button (Enter button):
• Press to edit the current value or option.
• Press to confirm a newly selected value or option.
• Press Enter + Up to jump up one entire category.
• Press Enter + Down to jump down one entire
category.
NOTE: QR codes in this image are for reference only.

15
Fig. 29 — Powering the Economizer Controller
Fig. 30 — Menu Structure Descriptions
Fig. 31 — LED Indication
p
Functions
FREE COOLING ECONOMIZING
Free cooling uses unconditioned outside air to cool the space di-
rectly. The economizer controller enables or disables free cooling
after it judges which control mode is active. It also uses hysteresis
to ensure a smooth switchover.
Depending on the sensors that are used, there are four different
control modes. In different control modes, the assessed conditions
are different. See Table 10.
DEFAULT HYSTERESIS SETTING
Hysteresis setting (DB) defaults to 2°F. Refer to Fig. 32.
Fig. 32 — Hysteresis Settings
Power
No. Description
1 Number representing the first-level menu of Status Display. Different
numbers represent different menus:
1: Status Display
2: Basic Settings
3: Advanced Settings
4: Alarms
5: Enter Configuration State and Reset
6: I/O Config
7: Testing
8: Enter Running State
2 Submenu*
3 Value of the current submenu*
12 3
*See Setup and Configuration for detailed submenus together with
possible values or ranges.
NO. DESCRIPTION
1Free Cooling LED
2Sensor LED
3DAC LED
123
Table 9 — LED Indication
STATUS
FREE
COOLING
LED
SENSOR
LED DAC LED
Commissioning mode Yellow
Blinking
Yellow
Blinking
Yellow
Blinking
Power start up Yellow On Yellow On Yellow On
Free cooling is running Green On — —
Free cooling is available
but not running
Green
Blinking ——
Not economizing when it
should Red Blinking — —
Economizing when it
should not Red On — —
Sensor working okay — Green On —
Humidity sensor error —YellowOn—
CO2 sensor error —LEDOff—
Air temperature fault/failure — Red On —
Excess outdoor air —Red
Blinking —
Damper working okay — — Green On
Damper not modulating — — Red On
Damper slippage ——
Red
Blinking
Damper unplugged ——
Fast Red
Blinking
Terminal ACT-FB is
configured but no available
feedback signal
——LEDOff
On
Off
ShutOff SP OAT
DB
LEGEND
OAT — Outside Air Temperature
DB — Deadband
SP — Set Point

16
DAMPER MODULATION DURING FREE COOLING
Once outside air is suitable for free cooling, the controller modu-
lates the damper based on MAT (mixed air temperature, default)
or OAT (outside air temperature). Refer to Table 10.
If MAT is used when free cooling is enabled, then MAT setpoint
(3MAT SET, configurable in “Parameter Settings — Advanced”
on page 27) is used for MAT modulating. When MAT falls below
the anti-freeze setpoint (3FRZ PROT), the damper either fully
closes or opens to the minimum position (configurable in “Param-
eter Settings — Advanced” on page 27.
1. If MAT is lower than MAT setpoint, then the damper is mod-
ulated to maintain MAT setpoint, towards fully closes or
opens to the minimum position based on occupancy status if
MAT continues dropping.
2. If MAT is in the range [MAT setpoint, (MAT setpoint +
neutral zone band (1°F by default))], then the damper position
does not change.
3. If MAT is higher than (MAT setpoint + neutral zone band),
then the damper opens towards fully open.
4. If MAT is 10°F higher than MAT setpoint, then the damper
fully opens to 100%.
If OAT is used when there is a cooling demand, the damper can be
opened to different positions depending on different outside air
temperatures:
1. If outside air is higher than 50°F but lower than the tempera-
ture shutoff setpoint, then the damper is fully open.
2. If outside air is higher than OAT lockout setpoint but lower
than 50°F, then linear modulation is applied when only Cool-
ing Stage 1 input (Y1I) is ON. Result of the following for-
mula indicates the damper’s open position:
((OAT – OAT Lockout Setpoint) / (50 – OAT Lockout
Setpoint)) * (80% – MIN POS) + MIN POS
NOTE: When both free cooling and mechanical cooling are
on, damper remains fully open regardless of the modulating
logic.
LOCATION-BASED SHUTOFF SETPOINTS
The economizer controller can get location-based temperature and
enthalpy shutoff setpoints automatically if it is connected to the
Climatix™1 mobile application. Once a Wi-Fi/WLAN stick is
plugged in, the economizer controller can establish network con-
nection with the mobile application. The temperature and enthalpy
shutoff setpoints obtained via the phone or tablet’s GPS function-
ality can then be synchronized to the economizer controller.
COOLING STAGE OPERATION
The economizer controller accepts inputs for 1, 2 and 3-stage
cooling inputs, and reroutes to the RTU through the relay connec-
tion Y1, Y2 and AUX1/AUX2.
The operation of the cooling stages is determined by the availabil-
ity of Free Cooling provided by the economizer operation mode.
See Cooling Stage I/O Logic Tables 11-12. Based on the use of
Free Cooling, the operating modes are as follows:
• Y1 is Stage 1 Cooling Demand.
• Y2 is Stage 2 Cooling Demand.
• Y3 is Stage 3 Cooling Demand.
• Free Cooling is always the first cooling stage.
• Cooling Stage 1 call from the Commercial Thermostat
(Y1) energizes the Y1 input to the economizer controller.
• Cooling Stage 2 call from the Commercial Thermostat
(Y2) energizes the Y2 input to the economizer controller.
• Cooling Stage 3 call from the Commercial Thermostat ener-
gizes the AUX1/AUX2 input to the economizer controller.
1. Third-party trademarks and logos are the property of their respective
owners.
Table 10 — Free Cooling Functions
CONTROL MODE SENSORS USED ENABLE FREE COOLING?
Control Mode 1
• Fixed Dry bulb
OA (outside air) temperature sensor
and
MA (Mixed Air) temperature sensor
The outside air dry bulb temperature is compared with the set temperature
shutoff setpoint.
If the outside air dry bulb temperature is below the temperature shutoff
setpoint, then the outside air is used to meet all or part of the cooling demand.
Control Mode 2
• Differential Dry bulb
(Dual Dry bulbs)
OA temperature sensor, RA (Return Air)
temperature sensor and MA temperature
sensor
The outside-air dry bulb temperature is compared with the return air dry
bulb temperature.
If both OAT and RAT are higher than the temperature high limitation, then
free cooling is prohibited.
If OAT or RAT is lower than the temperature high limitation, and the outside
air dry bulb temperature is lower than the return air dry-bulb temperature,
then the outside air is used to meet all or part of the cooling demand.
Control Mode 3
• Combination Fixed
Enthalpy and Fixed
Dry bulb Control
OA temperature and humidity sensor, and MA
temperature sensor
The outside air dry bulb temperature and enthalpy are compared with the
set temperature and enthalpy shutoff setpoints.
If the outside air enthalpy is lower than the set enthalpy shutoff setpoint,
and the outside air dry bulb temperature is lower than the temperature
shutoff setpoint, then the outside air can be used for economizing.
Control Mode 4
• Combination of
Differential
Enthalpy and Fixed
Dry bulb
OA temperature and humidity sensor, RA
temperature and humidity sensor,
and MA temperature sensor
The outside air dry bulb temperature and enthalpy are compared with the
temperature shutoff setpoint and return air enthalpy.
If both OA enthalpy and RA enthalpy are higher than the enthalpy high
limitation, then free cooling is prohibited.
If OA enthalpy or RA enthalpy is lower than the enthalpy high limitation,
outside air enthalpy is lower than the return-air enthalpy, and the outside
air dry bulb temperature is lower than the set temperature shutoff setpoint,
then outside air can be used for economizing.

17
MULTI-SPEED FAN SUPPORT
The economizer controller supports connection to 2 and 3-speed
fans. When the unit is equipped with a multi-speed fan, the damp-
er responds to multiple fan speeds via multiple minimum positions
(MIN POS) to keep minimum airflow. Refer to Tables 13-15.
If DCV (demand controlled ventilation) is enabled, then each fan
speed corresponds to two damper position ventilation setpoints
(VENT MIN, VENT MAX), e.g., Pos L corresponds to
2VENTMIN L... 2VENTMAX L. Refer to Table 16.
If CO2sensor is connected but DCV is disabled, then each fan
speed corresponds to one minimum damper position ventilation
setpoint. Refer to Table 17.
Table 11 — 1 and 2-Stage Cooling Stage I/O Logic
ECONOMIZER
CONDITION MET Y1 Y2 COOLING STAGE 1
COOLING
STAGE 2
NO On On On On
NO On Off On Off
NO Off Off Off Off
YES On On On On/Offa
NOTE(S):
a. If OAT MAT setpoint (3MAT SET), then Relay 2 is always OFF to disable
Cooling Stage 2. Otherwise, if both stages of cooling (Y1 and Y2) are ON for
more than a set time (15 minutes by default), Y2 remains ON, and the OAT is
higher than MAT setpoint, then Relay 2 energizes to allow Y2 pass-through to
enable Cooling Stage 2. To change the set time, configure 3STG3 DLY as de-
sired. See Advanced Settings page 27 for more details of 3STG3 DLY.
YES On Off Off Off
YES Off Off Off Off
Table 12 — 2 and 3-Stage Cooling Stage I/O Logic
ECONOMIZER
CONDITION
MET
Y1 Y2 Y3 COOLING
STAGE 1
COOLING
STAGE 2
COOLING
STAGE 3
NO On On On On On On
NO On On Off On On Off
NO On Off Off On Off Off
NO Off Off Off Off Off Off
YES On On On On On On/Offa
NOTE(S):
a. If OAT MAT setpoint, then Relay 3 is always OFF to disable Cooling Stage 3.
Otherwise, if all cooling stages (Y1, Y2 and Y3) are ON for more than a set time
(15 minutes by default), Y3 remains ON, and the OAT is higher than MAT set-
point, then Relay 3 energizes to allow AUX1/AUX2 pass-through to enable
Cooling Stage 3. To change the set time, configure 3STG3 DLY as desired. See
Advanced Settings page 27 for more details of 3STG3 DLY.
YES On On Off On On/Off Off
YES On Off Off Off Off Off
YES Off Off Off Off Off Off
IMPORTANT: The economizer controller can tolerate thermo-
stat wiring mismatch, e.g. Thermostat Y1 Economizer Y2-In,
Thermostat Y2 Economizer Y1-In. The handling logic is
Stage =Y1I + Y2I + Y3I. For example, Y1O =1 if Stage > =1,
Y2O =1 if Stage > = 2, Y3O=1 if Stage=3.
Table 13 — Damper MIN POS for 2-Speed Fana
NOTE(S):
a. A multi-speed fan is not controlled by the economizer controller, but an external
logic board.
Y1 Y2 W1 or O/B Spd L Spd H Pos L Pos H
X—— X—X—
XX— —X—X
— —X —X—X
LEGEND
Pos L — Damper MIN POS for Low-Speed Fan
Pos H — Damper MIN POS for High-Speed Fan
Spd L — Low Speed (Fan)
Spd H — High Speed (Fan)
Table 14 — Different Fan Speeds with Different
Configured Outputsa
NOTE(S):
a. If a single-speed fan connects to the Controller, then it opens directly on the call
of cooling/heating. The damper position is Pos H.
FAN
TYPE
1-SPEED
COOLINGb
b. Configured by Y1O, Y2O, or Y3O.
2-STAGE
COOLINGb
3-STAGE
COOLINGb
1-SPEED
FANc
c. Configured by 6FAN.
• Spd H)
(regardless of
cooling
demand,
OCC=Yes)
• Spd H)
(regardless of
cooling
demand,
OCC=Yes)
• Spd H
(regardless of
cooling demand,
OCC=Yes)
2-SPEED
FANc
• Spd L 
(0 or 1 cooling
demand)
• Spd H 
(2 cooling
demands)
• Spd L
(0 or 1 cooling
demand)
• Spd H3) 
(2 cooling
demands)
• Spd L 
(0 or 1 cooling
demand)
• Spd H 
(2 or 3 cooling
demands)
LEGEND
Spd L — Low Speed (Fan)
Spd H — High Speed (Fan)
Table 15 — Different Damper Minimum Positions with
Different Configured Outputs
FAN
TYPE
1-SPEED
COOLINGa
NOTE(S):
a. Configured by Y1O, Y2O, or Y3O.
2-STAGE
COOLINGb
3-STAGE
COOLINGb
1-SPEED
FANb
b. Configured by 6FAN.
•PosH
(regardless of
cooling
demand,
OCC=Yes)
•PosH
(regardless of
cooling
demand,
OCC=Yes)
•PosH
(regardless of
cooling
demand,
OCC=Yes)
2-SPEED
FANb
•PosH
(regardless of
cooling
demand,
OCC=Yes)
• Pos L 
(0 or 1 cooling
demand)
•PosH
(2 cooling
demands)
• Pos L4
(0 or 1 cooling
demand)
• PosH
(2 or 3 cooling
demands)
LEGEND
Pos L — Damper MIN POS for Low-Speed Fan
Pos H — Damper MIN POS for High-Speed Fan

18
COOLING DELAY VIA INCREASING FAN SPEED
If there is cooling demand while outside air is suitable for econo-
mizing, then the economizer controller tries to increase fan
speed to maximize the use of outside air first. If the cooling de-
mand is not reached within a set time, then mechanical cooling
will be enabled.
Typical field application:
1. Prerequisites:
• Outside air is suitable for economizing and free cooling is
ON.
• Fan connected to the controller supports multiple speeds.
Cooling delay function does not work if only a one-speed
fan is connected to the controller.
2. If it is a 2-speed fan and there are two cooling demand inputs/
outputs, then Y1-Input is called and the controller sets fan
speed to Speed Low. Damper is fully open (100%).
a. If Y2-Input is also called, then the controller increases
fan speed to Speed High and starts fan delay (2FAN
DLY) time. After the delay time runs out, the controller
starts Y1-Output.
b. If the cooling demand is not reached within 3STG3 DLY
time and OAT is higher than MAT setpoint
(3MAT SET), then the controller starts Y2-Output.
DEMAND CONTROLLED VENTILATION (DVC)
If a field-installed CO2sensor is connected to the
EconomizerONE controller, then a demand controlled ventilation
strategy will operate automatically. As the CO2level in the space
increases above the setpoint (on the EconomizerONE controller),
the minimum position of the dampers will be increased propor-
tionally, until the Maximum Ventilation setting is reached. As the
space CO2level decreases because of the increase in fresh air, the
outdoor damper will follow the higher demand condition from the
DCV mode or from the free cooling mode.
The controller modulates the outside air damper based on the CO2
level through the ppm value selected between the range of 500 and
2000 ppm. The measured CO2concentration value is compared
with the set DCV setpoint. If the measured CO2concentration val-
ue is below the DCV setpoint, then keep the damper to the mini-
mum position. Otherwise, enable DCV. Once DCV is enabled, the
DCV PID starts to run to control the indoor CO2concentration
value towards the DCV setpoint. The damper opens to the maxi-
mum position.
NOTE: DCV is disabled if the controller receives no occupancy
signal.
DCV operation is available in Occupied and Unoccupied periods
with EconomizerONE system. However, a control modification
will be required on the unit system to implement the Unoccupied
period function. Refer to Appendix B, Tables A-B “Fixed Dry-
Bulb without DCV (CO2 Sensor) — 2-Speed Fan” on page 31
and “Fixed Dry-Bulb with DCV (CO2 Sensor) — 2-Speed Fan In
Conventional Mode” on page 32 for controls and command
operation.
HIGH HUMIDITY LIMITATION
The economizer controller applies high limit of humidity to
enthalpy-based economizing. When the OA dew point is below
the dew point setpoint, enthalpy-based economizing is avail-
able. Otherwise, enthalpy-based economizing is unavailable.
ANTI-FREEZE PROTECTION
The economizer controller initiates the anti-freeze protection if
MAT or OAT temperature falls below the anti-freeze setpoint.
MAT-BASED ANTI-FREEZE PROTECTION
1. If MAT temperature falls below the anti-freeze setpoint
(3FRZ PROT), then:
• The controller closes both damper and compressor if unit
type is conventional unit and cooling/heating conventional
operation mode is enabled.
• The controller closes the damper if unit type is heat pump
and heat pump operation mode is enabled.
2. If the MAT sensor fails, then MAT is substituted by OAT to
continue the anti-freeze assessment. If OAT also fails, then
the controller closes the damper immediately.
OAT-BASED ANTI-FREEZE PROTECTION
If OAT temperature falls below the OAT lockout setpoint
(3OAT LOCK), then:
1. The controller stops the compressor from running if unit type
is conventional unit and cooling/heating conventional opera-
tion mode is enabled
2. The controller compressor is by-passed if unit type is heat
pump and heat pump operation mode is enabled.
Table 16 — Different Damper Position Setting with Different Configured Outputs (DCV is Enabled)
FAN TYPE 1-STAGE COOLINGa2-STAGE COOLINGa3-STAGE COOLINGa
1-SPEED FANb
• 2VENTMIN H to 2VENTMAX H
(regardless of cooling demand,
OCC=Yes)
• 2VENTMIN H to 2VENTMAX H
(regardless of cooling demand,
OCC=Yes)
• 2VENTMIN H to 2VENTMAX H
(regardless of cooling demand
OCC=Yes)
2-SPEED FAN
• 2VENTMIN H to 2VENTMAX H
(regardless of cooling demand,
OCC=Yes)
• 2VENTMIN L to 2VENTMAXL 
(0 or 1 cooling demand)
• 2VENTMIN H to 2VENTMAX H 
(2 cooling demands)
• 2VENTMIN L to 2VENTMAX L 
(0 or 1 cooling demand)
• 2VENTMIN H to 2VENTMAX H 
(2 or 3 cooling demands)
NOTE(S):
a. Configured by Y1O, Y2O, or Y3O.
b. Configured by 6FAN.
Table 17 — Different Damper Position Setting with Different Configured Outputs
(DCV is Disabled, CO2sensor is connected)
FAN TYPE 1-STAGE COOLINGa2-STAGE COOLINGa3-STAGE COOLINGa
1-SPEED FANb• 2VENTMIN H (regardless of cooling
demand, OCC=Yes)
• 2VENTMIN H (regardless of
cooling demand, OCC=Yes)
• 2VENTMIN H (regardless of
cooling demand, OCC=Yes)
2-SPEED FANb• 2VENTMIN H (regardless of cooling
demand, OCC=Yes)
• 2VENTMIN L 
(0 or 1 cooling demand)
• 2VENTMIN H 
(2 cooling demands)
• 2VENTMIN L (0 or 1 cooling
demand)
• 2VENTMIN H (2 or 3 cooling
demands)
NOTE(S):
a. Configured by Y1O, Y2O, or Y3O.
b. Configured by 6FAN.

19
EXHAUST FAN OPERATION
Up to two exhaust fans can be connected to the economizer
controller.
• If Exhaust Fan 1 is connected and configured, then
Exhaust Fan 1 parameter group (L, M and H) is available
depending on fan configuration.
• If Exhaust Fan 2 is connected and configured, then
Exhaust Fan 2 parameter group (L, M and H) is available
depending on fan configuration.
• The controller energizes Exhaust Fan Relay 1 and Exhaust
Fan Relay 2 if the damper position reaches Exhaust Fan 1
parameter setting and Exhaust Fan Relay 2 parameter set-
ting respectively. The selection of L, M or H matches the
current fan speed.
NOTE: If terminal ACT-FB is configured, then the damper posi-
tion is the damper feedback position. If feedback signal is unavail-
able, then it is the simulated position.
OCCUPANCY INPUT
The economizer controller can receive an occupancy signal from
the connected thermostat or work under Occupied mode all the
time. This is configurable in the Thermostat setup from Climatix™
mobile application or under the menu of I/O Configuration on the
inbuilt display. See “Parameter Settings — I/O Configurations” on
page 27 for more information.
PRE-OCCUPANCY PURGE
The Pre-Occupancy purge demand comes from the configura-
tion of the Auxiliary features in Climatix™mobile application
or 6AUX2-I under the menu of I/O Configuration on the in-
built display.
During pre-occupancy purge on the call of heating or when there
is no cooling/heating demand, the damper position is MIN POS.
During pre-occupancy purge on the call of cooling, the damper
position is MIN POS if outside air is not suitable for economiz-
ing. If outside air is suitable for economizing, then the damper
is fully open.
AIRFLOW COMMISSIONING
Airflow measurement station (differential pressure signal) can
connect to the controller temporarily to run airflow commission-
ing to calculate, calibrate, and store four fan speed characteristic
curves automatically at damper positions 40%, 60%, 80% and
100%. The controller places the damper to a proper position to
meet minimum or any other airflow requests in cfm. Users can
enable this function only from the Climatix™mobile application if
the related function is available in the current mobile application
version.
FAULT DETECTION AND DIAGNOSTICS
The economizer controller can detect and diagnose free cooling
faults, sensor operation faults, and damper modulating faults. It
can also report anti-freeze and shutdown notifications and actuator
errors. Following is a list of all detectable or reportable informa-
tion:
• Sensor disconnected or has no signal.
• Sensor short or high signal (under range or over range).
• Not economizing.
• Unexpected economizing.
• Excess outdoor air.
• Damper not modulating.
• Input power monitor and brownout. After detecting
brownout, the economizer controller enters the brownout
protection mode and disables all of the relay outputs.
• Anti-freeze notifications.
• Shutdown notifications.
• Actuator errors.
• Leaving air temperature is too low or too high.
• Cooling/heating error.
• Damper actuator cycle count. Parameter 1ACT CNT indi-
cates number of times actuator has cycled. It is resettable
via HMI item 8ACT CNT RESET.
FIRMWARE UPDATE
NOTE: Back up configurations before firmware update. All the
previous configuration data are erased after firmware update.
NOTE: Contact Application Engineering for more information on
support for firmware.
IMPORTANT: On the call of cooling when the controller is con-
figured to receive signal from the thermostat but the thermostat
is working under the Unoccupied mode, the damper is fully
closed if outside air is not suitable for economizing. If outside air
is suitable for economizing, then the damper is fully open.
IMPORTANT: The first six faults are detectable via LEDs or
alarm reports on the LCD. See LED Indication on page 15
and Alarms on page 28 for fault indications. These faults can
also be displayed in the Operating section of the Climatix™
mobile application.
IMPORTANT: If the controller enters the configuration state for
the convenience of I/O configurations, then users can manually
switch to the running state after finishing configurations. To do
so, press Enter + Up at the same time, and then press Enter to
confirm the switch after 8RUN STATE appears on the LCD.

20
MOUNTING, INSTALLATION, AND WIRING
Mounting the Economizer Controller Base
Module
Before mounting, leave specific mounting clearances so that there
is space for mounting, wiring, and servicing. See Fig. 33 and
Table 18 for economizer controller wiring details.
POL 224 can be mounted to sheet metal. Use two No. 6-3/4 in.
self-tapping screws to mount POL 224. Order screws and spac-
ers separately as they are not provided with the products.
Contact Application Engineering for detailed clearance require-
ments and graphical mounting instructions.
Mounting Devices Connected To the
Economizer Controller
Devices like damper actuators, sensors (temperature sensor, hu-
midity sensor, combination temperature and humidity sensor, CO2
sensor), thermostats and exhaust fans can be connected to the
economizer controller. For information on how to mount the de-
vices, see the device’s installation instructions. Fig. 33 — Economizer Control Wiring
WARNING
Failure to follow this caution may result in damage to
equipment. Be sure to allow enough time for compressor
startup and shutdown between checkout tests so that the
compressors do not short-cycle.