Carrier CRECOMZR077A00 Horizontal EconoMiser X Accessory Instruction Manual

: June 6, 2024
: Carrier

Table of Contents

Carrier CRECOMZR077A00 Horizontal EconoMiser X Accessory
Product Usage Instructions
ACCESSORIES LIST
INSTALLATION
Installing Optional HH57AC081/1185124 Single Outside Air Enthalpy Sensor
GENERAL W7220 CONTROLLER AND SENSOR INFORMATION
START-UP AND OPERATION
TROUBLESHOOTING
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Carrier CRECOMZR077A00 Horizontal EconoMiser X Accessory

Carrier-CRECOMZR077A00-Horizontal-EconoMiser-X-Accessory-product-
image

Specifications

Product Name: Small Rooftop Products Select
Capacity: 3 to 15 Tons
Accessory Model: EconoMi$er X
Part Numbers: CRECOMZR077A00, CRECOMZR079A00, CRECOMZR081A00

Product Usage Instructions

Safety Considerations
Installation of this accessory should be done by trained and qualified professionals due to potential hazards. Always follow safety precautions mentioned in the literature and on the equipment.
General Instructions
Before installation, ensure you have read the complete instructions. The accessory is designed to meet California’s Title 24 requirements for fault detection and diagnostics. The EconoMi$er X can be used with 1 or 2-speed indoor fan motor units.
Installation
The EconoMi$er X system utilizes gear-drive technology with a direct-mount spring return actuator. Make sure to follow the installation steps carefully to ensure proper functioning. Outdoor air temperature sensor, mixed air temperature sensor, and other optional sensors can be installed in the field.

Additional Instructions

Ensure proper gear-drive technology installation
Install optional sensors as needed
Follow all safety precautions during installation and servicing

FAQ

Q: Can this accessory be installed by anyone?
A: No, only trained and qualified installers should handle the installation, start-up, and servicing of this equipment.
Q: What sensors are available for field installation?
A: Outdoor enthalpy sensor, indoor (return) dry bulb or enthalpy sensor, and CO2 sensors can be installed in the field

Small Rooftop Products
Select 3 to 15 Tons
(48/50LC 14 Not Included) Horizontal EconoMi$er X Accessory

Installation Instructions
Part No. CRECOMZR077A00, CRECOMZR079A00,CRECOMZR081A00

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.
WARNING
ELECTRIC SHOCK HAZARD
Failure to follow this warning could result in personal injury, property damage, or death.
Before performing service or maintenance operations on unit, always turn off main power switch to unit and install lock(s) and lockout tag(s). Unit may have more than one power switch. Ensure electrical service to rooftop unit agrees with voltage and amperage listed on the unit rating plate.
If any wiring changes are required, first be sure to remove power from the economizer module before starting work. Pay particular attention to verifying the power connection (24 vac).
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 an d 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 fal l into the return duct opening. Be sure to remove the cover when installation is complete.

GENERAL

IMPORTANT: These economizers meet all the economizer re-quirements as laid out in California’s Title 24 mandatory section 120.2 (fault detection and diagnostics).
IMPORTANT: Read these instructions completely before at-tempting to install accessory economizer.
The EconoMi$er® X system utilizes the latest technology avail-able for integrating the use of free cooling with mechanical cool-ing for packaged rooftop units. The code compliant
W7220 con-trol system optimizes energy consumption, zone comfort, an d equipment cycling by operating the compressors when the out-door-air temperature is too warm, integrating the compresso r with outdoor air when free cooling is available, and locking ou t the compressor when outdoor-air temperature is too cold. De-mand controlled ventilation is supported.
This EconoMi$er X can be used with 1 or 2 speed indoor fan mo-tor units. (All other speed settings listed are for future use.)
The EconoMi$er X system utilizes gear-drive technology with a direct-mount spring return actuator that will close upon loss o f power. The EconoMi$er X system comes standard with fault de-tection and diagnostics (FDD), an outdoor air temperature sen-sor, and mixed air temperature sensor (also called supply air temperature sensor). Outdoor enthalpy, indoor (return) dry bul b or enthalpy, and CO2 sensors are available for field installation.
Standard integrated barometric relief dampers provide natural building pressurization control. An optional power exhaust system is available for applications requiring even greater exhaust capa-bilities. The power exhaust set point is adjustable at the EconoMi$er X controller.
See Tables 1-3 for package usage. See Table 4 for package con-tents. See Table 5 for sensor usage.

Table 1 — Carrier Package Usage

Table 2 — Bryant Package Usage

Table 3 — ICP Package Usage

Table 4 — Package Contents

PACKAGE NO.	QTY	CONTENTS
CRECOMZR077A00

1

| EconoMi$er Horizontal Damper Assembly with Actuator and

HH79ZZ007 OA Sensor

1

| EconoMi$er Horizontal Damper

Assembly with Actuator and HH79ZZ007 OA Sensor

1

|

EconoMi$er Horizontal Damper
Assembly with Actuator and HH79ZZ007 OA Sensor

NOTE(S):
Shipped in hardware kit for field installation.

Table 5 — EconoMi$er X Sensor Usage

APPLICATION| ECONOMI$ER X WITH OUTDOOR AIR DRY BULB SENSOR Accessories Required
---|---
Outdoor Air Dry Bulb| The HH79ZZ007 outdoor air dry bulb sensor is factory installed on economizer.
Mixed Air Sensor| HH79ZZ007 provided with economizer and field installed in blower compartment.
Single Enthalpy| HH57AC081/1185124
Differential Dry Bulb or Enthalpy| CRDIFRASN01A00a (When available, or MicroMetl 9901-2022-DIFF JC2)
CO 2 for DCV Control Using a Wall-Mounted CO 2 Sensor| ****

33ZCSENCO2 or CGCDXSEN004A00

CO 2 for DCV Control Using a Duct-Mounted CO 2 Sensor|

33ZCSENCO2 or CGCDXSEN004A00b and 33ZCSENCO2 or
CGCDXASP00100c

| ****

or

| ****

CRCBDIOX005A00d

NOTE(S):

Includes HH57AC081/1185124 sensor and wiring harness.
Accessory CO2 sensors.
Accessory aspirator boxes required for duct-mounted applications.
CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2 and 33ZCASPCO2 accessories.

ACCESSORIES LIST

The EconoMi$er® X system has several field-installed accessories available to optimize performance. See Table 6 for authorized parts and power exhaust descriptions.
Table 6 — EconoMi$er X Field-Installed Accessories

DESCRIPTION	PART NUMBER
Small & Large Cabinet Power Exhaust 208/230-v 1 Ph	CRPWREXH028A01
Small & Large Cabinet Power Exhaust 460-v 3 Ph	CRPWREXH029A01
Extra Large Cabinet Power Exhaust 208/230-v 1 Ph	CRPWREXH082A01
Extra Large Cabinet Power Exhaust 460-v 3 Ph	CRPWREXH083A01
Enthalpy Sensor (OA)	HH57AC081/1185124
Differential (Return) Sensor	CRDIFRASN01A00a
CO 2 Sensor and Aspirator Box	CRCBDIOX005A00
Return Air CO 2 Sensor (4 to 20 mA)	CRCBDIOX002A00
CO 2 Room Sensor (4 to 20 mA)	33ZCSENCO2 or CGCDXSEN004A00
Aspirator Box for Duct Mount CO 2 Sensor (4 to 20 mA)

33ZCASPCO2 or CGCDXASP001A00
Hinged Filter Door Kit for Small Cabinet| CRHNGPNL001A00
Hinged Filter Door Kit for Large Cabinet| CRHNGPNL002A00
Hinged Filter Door Kit for Extra Large Cabinet| CRHNGPNL003A00

NOTE(S):
a. When available, or MicroMetl 9901-2022-DIFF JC2.

INSTALLATION

For economizer component locations, see Fig. 1. For typical access panel locations, see Fig. 2.

Turn off unit power supply(s) and install lockout tag.
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 and discarded. See Fig.
2 WARNING
- ELECTRICAL SHOCK HAZARD
- Failure to follow this warning could result in personal injury and/or death.
- Disconnect power supply and install lockout tag before at-tempting to install accessory.
Remove the indoor coil access panel and discard. (See Fig. 2.) Remove the horizontal cover panel, see Fig. 2. Rein-stall panel over return opening in bottom of unit.
The EconoMi$er X hood assembly is shipped assembled. Aluminum filter must be installed on some models. (See Fig. 3.)
Set the EconoMi$er X assembly upright. (See Fig. 4.)
Insert the EconoMi$er X assembly into the rooftop unit, positioning the EconoMi$er X to the far left side of the opening. (See Fig. 5.)
Slide the EconoMi$er X assembly all the way back into the unit until it locks into the horizontal opening of the HVAC (heating, ventilation and air conditioning) unit.
Secure the EconoMi$er X mounting flanges to the HVAC unit with the screws provided. (See Fig. 6.)
Install a screw through the pre-punched hole in the EconoMi$er X assembly into the flange on the horizontal duct opening. (See Fig. 5 and 7.)
Remove the red tape securing the relief dampers for shipping purposes.
On some units, the EconoMi$er X assembly and hood does not reach to the top of the unit. In this case a front blank-off panel must be installed. Install provided front blank-of f panel above hood. Screw in place. (See Fig. 8 and 9.)
NOTE: The front blank-off panel must be installed before the hood because the top of the hood fits into a channel in the bottom of the panel.
Install the EconoMi$er X hood over the EconoMi$er X. Use screws provided. (See Fig. 9 and 10.) Insert screw through right side flange of hood into EconoMi$er X flange.
On some units, the return damper does not reach to the top of the horizontal return opening in the unit. In this case, a horizontal blank-off must be installed. Install the horizontal blank-off at the top of the horizontal return opening. (See Fig. 8.) Screw in place through pre-punched holes.
Install access door next to hood. Screw bottom of door to HVAC unit. (See Fig. 9 and 10.) For the economizer for the extra large cabinet, install plastic inserts on right-hand vertical post and install long gasketed screws along the vertical edge. Use standard serrated screws along the bottom of the panel for all units.
15. See economizer performance charts in Fig. 11 and 12. See base unit installation manual to make adjustments to meet building ventilation requirements.
If the EconoMi$er X will be operating with an enthalpy out-side air sensor, remove the factory-installed HH79ZZ007 dry bulb sensor from the front face of the economizer (see Fig. 1), and install the accessory enthalpy sensor HH57AC081/ 1185124 in the same location. Holes are pre-punched. Connect the (2) wire gray harness with plug from the EconoMi$er
X to the enthalpy sensor. See wiring diagram Fig. 25 and 30. Refer to the “Installing Optional HH57AC081/1185124 Out-side Air Enthalpy Sensor” section for more details on enthalpy settings.
Remove and save the 12-pin jumper plug from the unit economizer harness – located in the upper left corner of the unit. Insert the EconoMi$er X plug into the unit wiring harness. (See Fig. 13.)
NOTE: The 12-pin jumper plug should be saved for future use, in the event that the EconoMi$er X assembly is ever removed. The jumper plug is not needed as long as the EconoMi$er X assembly is installed.
18. Remove the indoor blower access panel and the panel(s) covering the unit control box. (See Fig. 14.)
19. In the hardware kit provided with the EconoMi$er X assembly is the HH63AW002 controller (Honeywell W7220). The controller is attached to a mounting bracket and the EconoMi$er X harness is attached to the controller. Mount the controller assembly on the left side of the unit control box. Screw bracket to the control box through pre-punched holes in control box. (See Fig. 15.)
Unplug the 10-pin female ECON plug currently connected to the Central Terminal Board (CTB). (See Fig. 16.)
Connect the 10-pin female ECON plug removed from the CTB to the 10-pin male plug from the controller harness. (See Fig. 17 and 25.)
Connect the 10-pin female plug from the controller harness to ECON on the CTB. (See Fig. 18 and 25.)
Connect the White wire from the controller harness to the W1 terminal on the CTB. (See Fig. 18 and 25.)
Connect the red and brown wires from the controller harness to the CTB. See Fig. 19 and 25. The red wire connects to “R” on the CTB, and the brown wire connects to “C.”
Locate the green wire with yellow stripe from the controller harness and screw it to the control box (ground). (See Fig. 20.)
Locate the 48TMHSRSE–A20 harness (with 4-pin female plug) provided in the hardware kit with the EconoMi$er X assembly. Connect the 48TMHSRSE–A20 harness to the 4-wire harness with a male plug from the controller harness. (See Fig. 21 and 25.)
Route the 4-wire 48TMHSRSE–A20 harness through the divider between the control box and the indoor blower section. (See Fig. 22.)
Screw the HH79ZZ007 mixed air (MAT) sensor to the left side edge of indoor blower through pre-punched hole, see Fig. 23. Confirm that the screw does not interfere with blower rotation. Connect the (2) spade terminals on the HH79ZZ007 sensor to the orange and brown wires from the 4-wire 48TM-HSRSE–A20 harness. (See Fig. 23 and 25.)
Connect the pink and violet wires from the 4-wire 48TMHSRSE–A20 harness to the pink and violet terminals in the wire bundle in the indoor blower section. (See Fig. 24 and 25.)
If using differential return sensor or DCV sensor, install it now. See installation details later in the instructions and the wiring diagram for further information.

$Carrier-CRECOMZR077A00-Horizontal-EconoMiser-X-Accessory- $2$$ $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $3$$

ECONOMIZER P/N	A	B	SHIP WT.
CRECOMZR077A00	25.1″	29.19″	95 lb
CRECOMZR079A00	25.1″	37.25″	150 lb
CRECOMZR081A00	24.81″	53.36″	245 lb

$Carrier-CRECOMZR077A00-Horizontal-EconoMiser-X-Accessory- $7$$ $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $11$$ $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $12$$ $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $13$$ $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $14$$ $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $15$$ $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $24$$ $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $26$$

INSTRUCTIONS FOR 48/50LC 07-12 UNITS ONLY

IMPORTANT: This section is for economizer installation instructions on 48/50LC 07-12 units only.

Follow steps 1 through 19 in the Installation section.
The 48/50LC 07-12 units require different wiring than is factory-attached to the W7220 controller. Disconnect the complete wiring harness factory-attached to the W7220 controller (see Fig. 26). This harness can be discarded.
NOTE: The 4-wire 48TMHSRSE–A20 harness provided with the economizer will also NOT be used on the 48/50LC 07-12 units, see Fig. 27.
The 48/50LC 07-12 units that do not have a factory-installed economizer will have a new W7220 controller wiring harness shipped in the control box section of the HVAC unit. This harness, Carrier part number 48LCHSRADH-A00, is shown in Fig. 28 and 29.
The connectors on the right side of Fig. 29 on the 48LCHSRADH-A00 harness attach to the W7220 controller installed in the unit control box. (See Fig. 29 and 30.) 48LCHSRADH-A00 harness connectors are labeled to easily identify the plug-in location on the controller.
Locate the Compressor Staging Control (CSC) board in the HVAC unit. When a field-installed economizer is used, the J5 jumper on the CSC must be removed. Remove the J5 jumper .(See Fig. 30.)
The connectors on the left side of Fig. 29 on the 48LCHSRADH-A00 harness attach to the unit’s CSC board. Connect J3 and J5 plugs to the CSC board. (See Fig. 30.)
Screw the green wire with yellow stripe in the 48LCHSRADH-A00 harness to the control box (ground). (See Fig. 20 and 30.)
Mount the provided HH79ZZ007 mixed air temperature (MAT) sensor to the indoor blower. Confirm that the screw s do not interfere with blower rotation (refer to Fig. 23). Connect the (2) spade terminals on the HH79ZZ007 to orange and brown wires in the indoor blower section wire bundle.
If using a differential return sensor or DCV sensor, install it now. See installation details later in these instructions and the wiring diagram for further information.

$Carrier-CRECOMZR077A00-Horizontal-EconoMiser-X-Accessory- $30$$ $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $31$$ $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $32$$ $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $33$$

Installing Optional HH57AC081/1185124 Single Outside Air Enthalpy Sensor

When using the HH57AC081/1185124 (Honeywell C7400S) enthalpy sensor for outside air changeover (see Fig. 31), the existing HH79ZZ007 dry bulb sensor must be removed.
The enthalpy sen-sor will be mounted in the same location as the dry bulb sensor (refer to Fig. 1). When the enthalpy sensor’s OA temperature, en-thalpy and dew point are below the respective set points, the out-side air can be used for free-cooling. When any of these is above the set point, free-cooling will not be available. Figure 32 shows the enthalpy boundaries in the W7220 controller. There are (5) en-thalpy boundaries (set points ES1 through ES5), which are defined by dry bulb temperature, enthalpy, and dew point. ES3 is the de-fault setting. Table 7 shows the High Limit Curves for each setting.
NOTE: To use the HH57AC081/1185124 sensor for outside air sensor, the DIP switches on the sensor must be set to OFF-OFF-OFF. See Table 8.
The (2) gray wires with a plug from the EconoMi$er X harness in the return chamber plug directly into the HH57AC081/1185124 enthalpy sensor. Refer to Fig. 25 and 30 for wiring.

$Carrier-CRECOMZR077A00-Horizontal-EconoMiser-X-Accessory- $35$$

Fig. 32 — Enthalpy Curve Boundaries
Table 7 — Single Enthalpy and Dual Enthalpy High Limit Curves

ENTHAPLY CURVE| TEMP DRY BULB (°F)| TEMP DEW POINT (°F)| ENTHALPY

(btu/lb/da)

| POINT P1| POINT P2
---|---|---|---|---|---
Temp (°F)| Humidity %RH| Temp (°F)| Humidity %RH
ES1| 80.0| 60.0| 28.0| 80.0| 36.8| 66.3| 80.1
ES2| 75.0| 57.0| 26.0| 75.0| 39.6| 63.3| 80.0
ES3| 70.0| 54.0| 24.0| 70.0| 42.3| 59.7| 81.4
ES4| 65.0| 51.0| 22.0| 65.0| 44.8| 55.7| 84.2
ES5| 60.0| 48.0| 20.0| 60.0| 46.9| 51.3| 88.5
HL| 86.0| 66.0| 32.4| 86.0| 38.9| 72.4| 80.3

Table 8 — HH57AC081/1185124 Sensor DIP Switch

Use

| DIP SWITCH POSITIONS FOR SWITCHES 1, 2, AND 3
---|---
1| 2| 3
DA| OFF| ON| OFF
RA| ON| OFF| OFF
OA| OFF| OFF| OFF

LEGEND

DA — Discharge Air or Supply Sensor
RA — Return Air
OA — Outside Air

Installing Differential Return Air Sensor

The CRDIFRASN01A00 differential return air sensor kit must be field mounted in the system’s return duct work. The kit includes a wiring harness that connects the EconoMi$er X harness in the re-turn chamber of the unit to the provided HH57AC081/1185124 sensor. Wire as shown in Fig. 33.
In addition to using the HH57AC081/1185124 (Honeywell C7400S) sensor (refer to Fig. 31) for a single enthalpy sensor, it can also be used as a differential return enthalpy or dry bulb sensor. Figure 32 shows the dual enthalpy boundaries in the W722 0 controller. With dual enthalpy, the HIGH LIMIT boundary is ES1 when there are no stages of mechanical cooling energize d and HL (high limit) when a compressor stage is energized. Refer to Table 7 for the High Limit Curves for each setting.
NOTE: To use the HH57AC081/1185124 sensor for differential return air, the DIP switches on the sensor must be set to ON-OFF-OFF. Refer to Table 8.
When using the CRDIFRASN01A00 differential return enthalpy or dry bulb temperature option, see Table 9 for California Title 24 setting requirements by region.

Provided in CRDIFRAS001A00 Kit.

Fig. 33 — Wiring Differential Return Air Sensor

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 change over. The temperatures vary by region within California. See
Table 9 for high limit settings.
Table 9 — California Title 24 Regional High Limit Dry Bulb Temperature Settings

(TABLE 140.4-B AIR ECONOMIZER HIGH LIMIT SHUT OFF CONTROL REQUIREMENTS)

DEVICE TYPE| CLIMATE ZONES| REQUIRED HIGH LIMIT (Economizer Off When): Description
---|---|---

Fixed Dry Bulb

Differential Dry Bulb

All

|

OAT exceeds 28 Btu/lb of dry airs or
OAT exceeds 75°F

NOTE(S):

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.
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.

Demand Controlled Ventilation (DCV)

Refer to EconoMi$er X wiring diagram (refer to Fig. 25 and 30) and DCV instructions if demand controlled ventilation (CO2 sensor) is used. CO2 sensor will wire into the blue and black connections at the controller as shown in Fig. 25, 30, and 34. If a field-installed CO2 sensor is connected to the EconoMi$er X controller, a demand controlled ventilation strategy will operate automatically. As the CO2 level in the space increases above the set point (on the EconoMi$er X controller), the minimum position of the dampers will be increased proportionally, until the Maximum Ventilation setting is reached. As the space CO2 level decreases because of the increase in fresh air, the outdoor damper will follow the higher de-mand condition from the DCV mode or from the free cooling mode.

$Carrier-CRECOMZR077A00-Horizontal-EconoMiser-X-Accessory- $37$$

Many codes including IECC, Title 24, and ASHRAE 90.1 requir e that the economizer’s faults be accessible by operating or service personal, or annunciated locally on zone thermostat. To setup re-mote monitoring on the controller, under SYSTEM SETUP, AUX1-OUT must be set to SYS.
The latest versions of Honeywell’s TH8321WF or TH8321R thermostats are options for meeting this requirement. Figure 35 shows an example of the thermostat wiring to the controller. Follow instructions provided with Honeywell thermostat.
Another option that is acceptable to some codes is an annunciator light visible by service personnel. See Fig. 36 for typical wiring to the controller. Refer to codes for proper labeling of light.

W7220Fig. 35 — Thermostat Wired for Remote FDD
W7220 Economizer Controller Module $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $39$$ $Carrier-CRECOMZR077A00-Horizontal- EconoMiser-X-Accessory- $40$$

GENERAL W7220 CONTROLLER AND SENSOR INFORMATION

W7220 Economizer
The economizer controller used on electromechanical units is a Honeywell W7220, which is located in the RTU base unit’s Con-trol Box. See the base unit’s Installation Instructions for the location of the Control Box access panel.

The W7220 controller provides the following:

2-line LCD interface screen for setup, configuration, and troubleshooting.
On-board fault detection and diagnostics
Sensor failure loss of communications identification
Automatic sensor detection
Capabilities for use with multiple-speed indoor fan systems

User Interface
The user interface consists of a LCD display and a 4-button key-pad on the front of the economizer controller.
Keypad
The four navigation buttons (see Fig. 37) are used to scroll through the menus and menu items, to select menu items, and to change parameter and configuration settings.

Using the Keypad with Menus
To use the keypad when working with menus:

Press the▲ (Up arrow) button to move to the previous menu.
Press the▼ (Down arrow) button to move to the next menu.
Press the (Enter) button to display the first item in the currently displayed menu.
Press the (Menu Up/Exit) button to exit a menu’s item and return to the list of menus.

Using the Keypad with Settings and Parameters
To use the keypad when working with set points, system and advanced settings, checkout tests, and alarms:

Navigate to the desired menu.
Press the (Enter) button to display the first item in the currently displayed menu.
Use the ▲ and ▼ buttons to scroll to the desired parameter.
Press the (Enter) button to display the value of the currently displayed item.
Press the ▲ button to increase the displayed parameter value.
Press the ▼ button to decrease the displayed parameter value.
NOTE: When values are displayed, pressing and holding the ▲or ▼ button causes the display to automatically increment.
Press the (Enter) button to accept the displayed value and store it in nonvolatile RAM.
The message “CHANGE STORED” displays.
Press the (Enter) button to return to the current menu parameter.
Press the (Menu Up/Exit) button to return to the previous menu.

Menu Structure
Table 11 illustrates the complete hierarchy of menus and parameters for the EconoMi$er X system.
The Menus in display order are:

STATUS
SETPOINTS
SYSTEM SETUP
ADVANCED SETUP
CHECKOUT
ALARMS

IMPORTANT: The default setting on the W7220 controller is for a “Fan Type” with 2 speed, which is correct for 2 o r 3 speed units (48/50LC 07-12). For a 1 (single) speed unit, the setting under SYSTEM SETUP > FAN TYPE must be changed to 1 speed.
IMPORTANT: Table 11 illustrates the complete hierarchy. Menu parameters may be different depending on configuration. For example, none of the DCV parameters appear for a system that does not have a DCV (CO2) sensor.

Programming the W2770 Controller

The next several pages detail the different status displays, set points, setup, and alarms available on the controller. The list below and Table 10 summarize the inputs required for a standard applica-tion with a single outside air sensor.
NOTE: Instead of setting the SETPOINTS, you can use the de-faults already set in the controller – see default settings below. See Table 10 for summarized standard settings or, for more detail, see Table 11 — Menu Structure.

SETPOINTS

MAT SET: this sets the mixed air temperature (MAT) set-ting. The controller has a default of 53°F, but the range is anywhere from 38°F to 70°F.
LOW T LOCK: This setting locks out the compressor (or mechanical cooling) at a given temperature. The default is 32°F, but the controller’s range is from –45°F to 80°F.
DRYBULB SET: if you have an economizer with a dry bulb outside air sensor, you will see and set th e DRY-BULB SET. The default setting is 63°F but the con-troller’s range is 48°F to 80°F.
ENTH CURVE: if you have a single enthalpy outside air sensor instead of a dry bulb, you will see and set the ENTH CURVE setting. There are 5 setting options: ES1 throug h ES5.
Refer to Table 7 for the limits for each of these set-tings. ES3 is the default setting.
MIN POS: The minimum position allows for ventilatio n even when not in the free-cooling mode. If you have a sin-gle speed unit there will be only one minimum positio n setting.
The default is 4.4 volts, but the range is 2 t o 10 vdc.
MIN POS H and MIN POS L: If your unit is 2 speed, ther e will be 2 minimum position settings that show up on the menu. The first is MIN POS H (for high speed), which has a default of 4.4-v. The second is MIN POS L (for lo w speed), which has a default of 6.0-v. Note that MIN POS H and MIN POS L are only displayed if under SYSTEM SETUP, AUX2
IN is set to “W1”, and FAN TYPE is set to 2 speed.

SYSTEM SETUP

INSTALL: Allows you to set the current date. Use the key-pad buttons to scroll to the correct date.
EQUIPMENT: Always set to CONV even if the unit is a heat pump.
AUX2 IN: Always set to W.
FAN TYPE: Set for either single speed or 2 speed. The de-fault setting is 2 speed.
AUX OUT: If remote Fault Detection and Diagnostic (FDD) monitoring is required, select SYS.
OCC: occupancy, always set to INPUT

Table 10 — Standard W7220 Controller Configurations

CONTROLLER MENU ITEM| FOR SINGLE-SPEED UNIT| FOR 2-SPEED UNIT b| NOTE
---|---|---|---
Default| Set to:| Default| Set To:

SET POINTS

| MAT SET| 53°F| 38°F to 70°F| 53°F| 38°F to 70°F|
LOW T LOCK| 32°F| –45°F to 80°F| 32°F| –45°F to 80°F|
DRYBLB SET| 63°F| 48°F to 80°F| 63°F| 48°F to 80°F| Only displayed if using single DB OA sensor
ENTH CURVE| ES3| ES1 to ES5| ES3| ES1 to ES5| Only displayed if using a single enthalpy OA sensor
MIN POS| 4.4 vdc| 2 to 10 vdc| —| —| Only displayed if set up for single speed unit
MIN POS H| —| —| 4.4 vdc| 2 to 10 vdc| Only displayed if set up for 2 speed unit
MIN POS L| —| —| 6.0 vdc| 2 to 10 vdc| Only displayed if set up for 2 speed unit

SYSTEM SETUP

NOTE(S):

More sophisticated controller setups, including for DCV or power exhaust, are available. See Table 11 for options.
For 2 speed unit, under SYSTEM SETUP: EQUIPMENT= CONV, AUX2 I = W, and FAN TYPE = 2 SPEED
Fan speed options are:
1. Speed
2. Speed
3. Speed: 1 Heat, 1 Cool.
4. Speed: 1 Heat, 2 Cool.
Do not use 3 speed setting for LC units

Table 11 — Menu Structure

MENU

| ****

PARAMETER

| PARAMETER DEFAULT

VALUE

| PARAMETER RANGE AND

INCREMENT b

| ****

NOTES

---|---|---|---|---

STATUS

| ****

ECON AVAIL

| ****

NO

| ****

YES/NO

| ECONOMIZING AVAILABLE

YES = economizing available; the system can use outside air for free cooling when required

ECONOMIZING

| ****

NO

| ****

YES/NO

| ECONOMIZING ACTIVE

YES = Outside air being used for first stage cooling NO = Economizing not active

OCCUPIED

| ****

NO

| ****

YES/NO

| OCCUPIED

YES = OCC signal received from space thermostat or unitary controller YES = 24 vac on terminal OCC.

NO = 0 vac on terminal OCC.

HEAT PUMP| n/a| COOL HEAT| HEAT PUMP MODE

(Not available on 2-speed configuration)

COOL Y1-IN

| ****

OFF

| ****

ON/OFF

| FIRST STAGE COOLING DEMAND (Y1-IN)

Y1-I signal from space thermostat or unitary controller for cooling stage 1. ON = 24 vac on terminal Y1-I

OFF = 0 vac on terminal Y1-I

COOL Y1-OUT

| ****

OFF

| ****

ON/OFF

| FIRST STAGE COOLING RELAY OUTPUT

ON = 24 vac on terminal Y1-O; Stage 1 mechanical cooling called on OFF = 0 vac on terminal Y1-O; no mechanical cooling

COOL Y2-IN

| ****

OFF

| ****

ON/OFF

| SECOND STAGE COOLING DEMAND (Y2-IN)

Y2-I signal from space thermostat our unitary controller for second stage cooling.

ON = 24 vac on terminal Y2-I OFF = 0 vac on terminal Y2-I

COOL Y2-OUT

| ****

OFF

| ****

ON/OFF

| SECOND STAGE COOLING RELAY OUTPUT

ON = 24 vac on terminal Y2-O; stage 2 mechanical cooling called on OFF = 0 vac on terminal Y2-O; no stage 2 mechanical cooling

MA TEMP

| ****

. _°F (or °C)

| 0°F to 140°F (–18°C to 60°C)| MIXED AIR TEMPERATURE, Cooling Mode

Displays value of measured mixed air from MAT sensor. Displays . _ if not connected, short or out-of-range.

DA TEMP

| ****

. _°F (or °C)

| ****

0°F to 140°F (–18°C to 60°C)

| DISCHARGE AIR TEMPERATURE, after Heating section (Accessory sensor required)

Displays when Discharge Air sensor is connected and displays measured discharge temperature. Displays . _ if sensor sends invalid value, if not

connected, short or out-of-range.

OA TEMP

| ****

. _°F (or °C)

| –40°F to 140°F (–40°C to 60°C)| OUTSIDE AIR TEMPERATURE

Displays measured value of outdoor-air temperature. Displays . _ if sensor sends invalid value, short or out-of-range.

OA HUM

| ****

%

| ****

0 to 100%

| OUTSIDE AIR RELATIVE HUMIDITY

Displays measured value of outdoor humidity from OA sensor. Displays __ % if not connected, short, or out-of-range.

RA TEMP

| ****

. _°F (or °C)

| ****

0°F to 140°F (–18°C to 60°C)

| RETURN AIR TEMPERATURE

Displays measured value of return air temperature from RAT sensor.

Displays . _ if sensor sends invalid value, if not connected, short or out- of-range

RA HUM

| ****

%

| ****

0 to 100%

| RETURN AIR RELATIVE HUMIDITY

Displays measured value of return air humidity from RA sensor. Displays

__ % if sensor sends invalid value, if not connected, short or out-of-range

IN CO2

| ****

_ppm

| ****

0 to 2000 ppm

| SPACE/RETURN AIR CO2

(CO2 sensor required, accessory or factory option)

Displays value of measured CO2 from CO2 sensor. Invalid if not connected,

short or out-of-range

DCV STATUS

| ****

n/a

| ****

ON/OFF

| DEMAND CONTROLLED VENTILATION STATUS

(CO2 sensor required, accessory or factory option)

Displays ON if above set point and OFF if below set point, and ONLY if a

CO2 sensor is connected.

DAMPER OUT

| ****

2.0-v

| ****

2.0 to 10.0-v

| Displays voltage output to the damper actuator. 0% = OA Damper fully closed

100%= OA Damper full open

ACT POS

| ****

%

| ****

0 to 100%

| Displays actual position of outdoor air damper actuator 2.0-v = OA Damper fully-closed

10.0-v = OA Damper full open

ACT COUNT| n/a| 1 to 65535| Displays number of times actuator has cycled.

1 cycle equals accrued 180° of actuator movement in any direction

ACTUATOR| n/a| OK/Alarm

(on Alarm menu)

| Displays Error if voltage or torque is below actuator range

EXH1 OUT

| ****

OFF

| ****

ON/OFF

| EXHAUST STAGE 1 RELAY OUTPUT

Output of EXH1 terminal: ON = relay closed

OFF = relay open

EXH2 OUT

| ****

OFF

| ****

ON/OFF

| EXHAUST STAGE 2 RELAY OUTPUT

Output of AUX terminal; displays only if AUX = EXH2 ON = relay closed

OFF = relay open

MENU

| ****

PARAMETER

| PARAMETER DEFAULT VALUE| PARAMETER RANGE AND INCREMENT b|

NOTES

---|---|---|---|---

STATUS

(cont)

| ****

ERVc

| ****

OFF

| ****

ON/OFF

| ENERGY RECOVERY UNIT RELAY OUTPUT

Output of AUX terminal; displays only if AUX = ERV ON = relay closed

OFF = relay open

MECH COOL ON| 0| 0, 1, or 2| Displays stage of mechanical cooling that is active.
FAN SPEED| n/a| LOW or HIGH| SUPPLY FAN SPEED

Displays speed setting of fan on a 2?speed fan unit.

W (HEAT ON)| n/a| ON/OFF| HEAT DEMAND STATUS

Displays status of heat demand on a 2?speed fan unit.

SETPOINTS

| ****

MAT SET

| ****

53°F (12°C)

| 38°F to 65°F (3°C to 18°C);

increment by 1°

| MIXED AIR SET POINT

Set point determines where the economizer will modulate the OA damper to maintain the mixed air temperature.

LOW T LOCK

| ****

32°F (0°C)

| –45°F to 80°F (–43°C to 27°C);

increment by 1°

| COMPRESSOR LOW TEMPERATURE LOCKOUT

Set point determines outdoor temperature when the mechanical cooling cannot be turned on. Commonly referred to as the compressor lockout.

DRYBLB SET

| ****

63°F (17°C)

| ****

48°F to 80°F (9°C to 27°C);

increment by 1°

| OA DRY BULB TEMPERATURE CHANGEOVER SETPOINT

Setpoint determines where the economizer will assume outdoor air temperature is good for free cooling; e.g.: at 63°F (17°C), unit will economize at 62°F (16.7°C) and below and not economize at 64°F (17.8°C) and above. There is a 2°F (1.1°C) deadband.

DRYBULB SET is only displayed if the economizer has a single dry bulb sensor.

DRYBLB DIFF

| ****

0°F

| ****

0°F to 6°F;

increment by 2°F

| Dry bulb Differential will only show if using dual dry bulb – i.e. when an outdoor air temperature sensor C7250 is attached to OAT terminals and C7400S sensor is wired to S-Bus and configured for RAT (return air).

Free cooling will be assumed whenever OA temp is at or below RAT minus this dry bulb setting.

ENTH CURVE

| ****

ES3

| ES1,ES2,ES3,ES 4, or ES5| ENTHALPY CHANGEOVER CURVE

(Requires enthalpy sensor option)

Enthalpy boundary “curves” for economizing using single enthalpy.

DCV SET

| ****

1100 ppm

| ****

500 to 2000 ppm;

increment by 100

| DEMAND CONTROLLED VENTILATION SET POINT

Displays only if CO2 sensor is connected. Set point for Demand Control Ventilation of space. Above the set point, the OA dampers will modulate open

to bring in additional OA to maintain a space ppm level below the set point.

MIN POS

| ****

4.0V

| ****

2 to 10 vdc

| VENTILATION MINIMUM POSITION.

Only displayed if controller is set for single speed unit under FAN TYPE, and if DCV is NOT used.

MIN POS L

| ****

6.0V

| ****

2 to 10 vdc

| VENTILATION MINIMUM POSITION AT LOW SPEED.

Only displays if unit is set for 2 or 3 speed and CO2 is not used. IF using 2 speed with 1 heat and 1 cool then set for HEATING ventilation. If using

3 speed with 1 heat and 2 cool then set for LOW SPEED COOLING ventilation.

MIN POS M

| ****

5.4V

| ****

2 to 10 vdc

| VENTILATION MINIMUM POSITION AT MEDIUM SPEED.

Only displays if unit is set for 3 speed with 1 heat and 2 cool, and CO2 is not

used. Set for HEATING ventilation.

MIN POS M

| ****

4.4V

| ****

2 to 10 vdc

| VENTILATION MINIMUM POSITION AT HIGH SPEED.

Only displays if unit is set for 2 or 3 speed and CO2 is not used. IF using 2 speed with 1 heat and 1 cool then set for COOLING ventilation. If using 3 speed with

1 heat and 2 cool then set for HIGH SPEED COOLING ventilation

VENTMAX L

| ****

6.0V

| ****

2 to 10 vdc

| DCV MAXIMUM DAMPER POSITION AT LOW SPEED

Displays only if a CO2 sensor is connected. Used for Vbz (ventilation max cfm) set point. Displays 2 to 10 V if <3 sensors (RA,OA, and MA). In AUTO

mode dampers controlled by cfm.

VENTMAX M

| ****

5.4V

| ****

2 to 10 vdc

| DCV MAXIMUM DAMPER POSITION AT MEDIUM SPEED.

Only displays if unit is set for 3 speed with 1 heat and 2 cool. Set for HEATING ventilation.

VENTMAX H

| ****

4.4V

| ****

2 to 10 vdc

| DCV MAXIMUM DAMPER POSITION AT HIGH SPEED.

Only displays if unit is set for 2 speed or 3 speed with 1 heat and 2 cool. IF using 2 speed with 1 heat and 1 cool then set for COOLING ventilation. If using

3 speed with 1 heat and 2 cool then set for HIGH SPEED COOLING ventilation.

VENTMIN L

| ****

3.7V

| ****

2 to 10 vdc

| DCV MINIMUM DAMPER POSITION AT LOW SPEED.

Only displays if unit is set for 2 speed or 3 speed with 1 heat and 2 cool. IF using 2 speed with 1 heat and 1 cool then set for HEATING ventilation. If using

3 speed with 1 heat and 2 cool then set for LOW SPEED COOLING ventilation.

VENTMIN M

| ****

3.4V

| ****

2 to 10 vdc

| DCV MINIMUM DAMPER POSITION AT MEDIUM SPEED.

Only displays if unit is set for 3 speed with 1 heat and 2 cool. Set for HEATING ventilation.

VENTMIN H

| ****

2.8V

| ****

2 to 10 vdc

| DCV MINIMUM DAMPER POSITION AT HIGH SPEED.

Only displays if unit is set for 2 speed or 3 speed with 1 heat and 2 cool. IF using 2 speed with 1 heat and 1 cool then set for COOLING ventilation. If using

3 speed with 1 heat and 2 cool then set for HIGH SPEED COOLING ventilation.

ERV OAT SP

| ****

32°F (0°C)

| 0°F to 50°F (–18°C to 10°C);

increment by 1°

| ENERGY RECOVERY VENTILATION UNIT OUTDOOR AIR TEMPERATURE SETPOINT

Only displayed when AUX1 O = ERV

EXH1 SET| 50%| 0 to 100%| Exhaust fan set point for single speed units. Based on OA Damper position to activate power exhaust.

MENU

| ****

PARAMETER

| PARAMETER DEFAULT VALUE| PARAMETER RANGE AND INCREMENT b|

NOTES

---|---|---|---|---

SETPOINTS

(cont)

| ****

EXH1 L SET

| ****

65%

| ****

0 to 100%

| EXHAUST FAN 1 SETPOINT AT LOW SPEED

On 2 speed or 3 speed with 1 heat and 2 cool. Based on economizer OA damper position to activate power exhaust.

EXH1 M SET

| ****

60%

| ****

0 to 100%

| EXHAUST POINT 1 SETPOINT AT MEDIUM SPEED

Only displays if unit is set for 3 speed with 1 heat and 2 cool. Based on economizer OA damper position to activate power exhaust.

EXH2 H SET

| ****

50%

| ****

0 to 100%

| EXHAUST FAN 1 SETPOINT AT HIGH SPEED

On 2 speed or 3 speed with 1 heat and 2 cool. Based on economizer OA damper position to activate power exhaust.

EXH2 L SET

| ****

80%

| ****

0 to 100%

| EXHAUST FAN 2 SETPOINT AT LOW SPEED

On 2 speed or 3 speed with 1 heat and 2 cool. Based on economizer OA damper position to activate power exhaust.

EXH2 M SET

| ****

77%

| ****

0 to 100%

| EXHAUST FAN 2 SETPOINT AT MEDIUM SPEED

Only displays if unit is set for 3 speed with 1 heat and 2 cool. Based on economizer OA damper position to activate power exhaust.

EXH2 H SET

| ****

75%

| ****

0 to 100%

| EXHAUST FAN 2 SETPOINT AT HIGH SPEED

On 2 speed or 3 speed with 1 heat and 2 cool. Based on economizer OA damper position to activate power exhaust.

SYSTEM SETUP

FAN TYPE

| ****

2 speed

| ****

1 speed/2 speed

| Sets the economizer controller to the number of unit fan speeds. Fan Type options:

1 Speed units

2 speed units

2 speed units: 1 for heat and 1 for coold 3 speed units: 1 for heat and 2 for coold

FAN CFM| 5000 cfm| 100 to 15000 cfm;

increment by 100

| UNIT DESIGN AIRFLOW (cfm)

Enter ONLY if using DCVCAL ENA = AUTO

AUX OUT

| ****

NONE

| NONE ERV

EXH2 SYS

| • NONE = not configured (output is not used)

• ERV = Energy Recovery Ventilation

• EXH2 = second damper position relay closure for second exhaust fan

• SYS = use output as an alarm signal

OCC| INPUT| INPUT or ALWAYS| Always set to INPUT

ADVANCED SETUP

| ****

MA LO SET

| ****

45°F (7°C)

| 35°F to 55°F (2°C to 12°C);

incremented by 1°

| MIXED AIR TEMPERATURE LOW LIMIT

Temperature to achieve Freeze Protection (close damper and alarm if temperature falls below setup value).

FREEZE POS

| ****

CLO

| ****

CLO or MIN

| FREEZE PROTECTION DAMPER POSITION

Damper position when freeze protection is active CLO = closed

MIN = MIN POS or VENTMIN

CO2 ZERO| 0 ppm| 0 to 500 ppm;

Increment by 10

| CO2 ppm level to match CO2 sensor start level.
CO2 SPAN| 2000 ppm| 1000 to 3000 ppm;

Increment by 10

| CO2 ppm span to match CO2 sensor.

STG3 DLY

| ****

2.0h

| ****

0 min, 5 min, 15 min, then 15 min intervals. Up to 4 h or OFF

| COOLING STAGE 3 DELAY

Delay after stage 2 for cool has been active. Turns on second stage of cooling

when economizer is first stage and mechanical cooling is second. Allows three stages of cooling, 1 economizer and 2 mechanical.

OFF = no Stage 3 cooling

SD DMPR POS

| ****

CLO

| ****

CLO or OPN

| Function NOT AVAILABLE with 2-speed mode

Indicates shutdown signal from space thermostat or unitary controller. When controller receives 24 vac input on the SD terminal in conventional mode, the OA damper will open if programmed for OPN and OA damper will close if

programmed for CLO. All other controls, e.g., fans, etc. will shut off.

DCVCAL ENA

| ****

MAN

| ****

MAN (manual) AUTO

| Turns on the DCV automatic control of the dampers. Resets ventilation based on the RA, OA, and MA sensor conditions. Requires all 3 RA, OA, and MA sensors.

For single speed units only.

MAT T CAL

| ****

0.0°F (or °C)

| ****

±2.5°F (±1.4°C)

| MIXED AIR TEMPERATURE CALIBRATION

Allows for the operator to adjust for an out of calibration mixed air temperature (MAT) sensor

OA T CAL

| ****

0.0°F (or °C)

| ****

±2.5°F (±1.4°C)

| OUTSIDE AIR TEMPERATURE CALIBRATION

Allows for the operator to adjust for an out of calibration outside air temperature (OAT) sensor

OA H CAL

| ****

0% RH

| ****

±10% RH

| OUTSIDE AIR HUMIDITY CALIBRATION

Allows for the operator to adjust for an out of calibration outside air enthalpy sensor

MENU

| ****

PARAMETER

| PARAMETER DEFAULT VALUE| PARAMETER RANGE AND INCREMENT b|

NOTES

---|---|---|---|---

ADVANCED

SETUP (cont)

| ****

RA T CAL

| ****

2.0°F (or °C)

| ****

±2.5°F (±1.4°C)

| RETURN AIR TEMPERATURE CALIBRATION

Allows for the operator to adjust for an out of calibration return air temperature (RA) sensor

RA H CAL

| ****

0% RH

| ****

±10% RH

| RETURN AIR HUMIDITY CALIBRATION

Allows for the operator to adjust for an out of calibration return air enthalpy sensor

DA T CAL

| ****

0.0°F (or °C)

| ****

±2.5°F (±1.4°C)

| DISCHARGE AIR TEMPERATURE CALIBRATION

Allows for the operator to adjust for an out of calibration discharge air temperature (DAT) sensor

2SP FAN DELAY

| ****

5 minutes

| 0 to 20 minutes in

1 minute increments

| TIME DELAY ON SECOND STAGE ECONOMIZING

While in the Economizing mode, this is the delay between thermostat Y2 call and Y1-O output to mechanical cooling stage, to allow high speed fan

operation to attempt to cool space first.

CHECKOUT

| DAMPER VMIN- HS| n/a| n/a| Positions OA damper to VMIN High Speed position
DAMPER VMAX- HS| n/a| n/a| Positions OA damper to VMAX High Speed position

DAMPER OPEN

| ****

n/a

| ****

n/a

| Position OA damper to the full open position.

Exhaust fan contacts enable during the DAMPER OPEN test. Make sure to pause in the mode to allow exhaust contacts to energize due to the delay in the system.

DAMPER CLOSE| n/a| n/a| Positions damper to the fully closed position
CONNECT Y1-O| n/a| n/a| Closes the Y1-O relay (Y1-O)
CONNECT Y2-O| n/a| n/a| Closes the Y2-O relay (Y2-O)

CONNECT AUX1O

| ****

n/a

| ****

n/a

| Energizes the AUX1O output. If Aux setting is:

• NONE—no action taken

• ERV—24 vac out. Turns on or signals an ERV that the conditions are not good for economizing but are for ERV operation.d

• SYS—24 vac out. Issues a system alarm

ALARMS(_)

| Alarms display only when they are active. The menu title “ALARMS(_)” includes the number of active alarms in parenthesis ( ). When

using SYLK™e bus sensors, “SYLK” will appear on the screen, and when using 20k OA temperature sensors, “SENS T” will appear on the screen

MA T SENS ERR

| ****

n/a

| ****

n/a

| MIXED AIR TEMPERATURE SENSOR ERROR

Mixed air sensor has failed or become disconnected – check wiring then replace sensor if the alarm continues.

CO2 SENS ERR

| ****

n/a

| ****

n/a

| CO2 SENSOR ERROR

CO2 sensor has failed, gone out of range or become disconnected – check

wiring, then replace sensor if the alarm continues.

OA SENS T ERR

| ****

n/a

| ****

n/a

| OUTSIDE AIR TEMPERATURE SENSOR ERROR

Outdoor-air temperature sensor has failed or become disconnected – check wiring (OAT sensor connected at input terminals OAT), then replace if the alarm continues.

OA SYLK SENS ERR| n/a| n/a| OUTSIDE AIR ENTHALPY SENSOR ERROR

OAT sensor connected on S-bus.

DA T SENS ERR| n/a| n/a| DISCHARGE AIR TEMPERATURE SENSOR ERROR
SYS ALARM| n/a| n/a| When AUX1-0 is set to SYS and there is any alarm (e.g., failed sensors, etc.), the AUX1-0 terminal has 24 vac out.
ACT UNDER V| n/a| n/a| ACTUATOR VOLTAGE LOW

Voltage received by Actuator is below expected range.

ACT OVER V| n/a| n/a| ACTUATOR VOLTAGE HIGH

Voltage received by Actuator is over expected range.

ACT STALLED| n/a| n/a| ACTUATOR STALLED

Actuator stopped before achieving commanded position.

NOTE(S):

This table illustrates the complete hierarchy. Menu parameters may be different depending on configuration. For example, none of the DCV parameters appear for a system that does not have a DCV (CO2) sensor.
When values are displayed, pressing and holding the ▲ or ▼ button causes the display to automatically increment.
ERV Operation: When in Cooling mode AND the conditions are NOT OK for economizing – the ERV terminal will be energized. In the Heating mode the ERV terminal will be energized when the OA is below the ERV OAT set point in the set point menu.
These Fan Type (speed) settings are for future use only. Do not use for 3 speed LC units.
Third-party trademarks and logos are the property of their respective owners.
LEGEND
- LCD — Liquid Crystal Display
- MAT — Mixed Air Temperature
- n/a — Not applicable
- OAT — Outdoor Air Temperature
- OCC — Occupied
- RAT — Return Air Temperature
- RTU — Rooftop Unit

Checkout Tests
Use the Checkout menu (refer to Table 11) to test the damper operation and any configured outputs. Only items that are configured are shown in the Checkout menu.
NOTE: See User Interface for information about menu navigation and use of the keypad.
To perform a Checkout test:

Scroll to the desired test in the Checkout menu using the ▲ and ▼ buttons.
Press the button to select the item.
RUN? appears.
Press the button to start the test.
The unit pauses and then displays IN PROGRESS.
When the test is complete, DONE appears.
When all desired parameters have been tested, press the (Menu up) button to end the test.
Checkout test can be performed at any time during the operation of the system as a test that the system is operable.

CAUTION

EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in damage to equipment.
Be sure to allow enough time for compressor startup and shut-down between checkout tests. Do not short-cycle the compressors.

SETUP AND CONFIGURATION

W7220 Economizer Module Wiring
See Fig. 38 and Tables 12 and 13 to locate the wiring terminals for the economizer module.
NOTE: The four terminal blocks are removable. Slide out each terminal block, wire it, and then slide it back into place.

Table 12 — Economizer Module — Left Hand Terminal Blocks

MAT MAT| 20k NTC

and COM

| Mixed Air Temperature Sensor (Polarity insensitive connections)
---|---|---
OAT OAT| 20k NTC

and COM

| Outdoor Air Temperature Sensor (Polarity insensitive connection)
S-BUS S- BUS| S-BUS

(Sylk Bus)

| Enthalpy Control Sensor (Polarity insensitive connection)
IAQ 2-10| 2-10 vdc| Air Quality Sensor Input (e.g. CO2 sensor)
---|---|---
IAQ COM| COM| Air Quality Sensor Common
IAQ 24V| 24 vac| Air Quality Sensor 24 vac Source
ACT 2-10| 2-10 vdc| Damper Actuator Output (2-10 vdc)
ACT COM| COM| Damper Actuator Output Common
ACT 24V| 24 vac| Damper Actuator 24 vac Source

Table 13 — Economizer Module — Right Hand Terminal Blocks

LABEL	TYPE	DESCRIPTION
n/a	The first terminal is not used
---	---	---

AUX2 I

| ****

24 vac IN

| Shut Down (SD) or Heat (W)

Conventional only and

Heat Pump Changeover (O?B) in Heat Pump mode.

AUX1 O

| ****

24 vac OUT

| Programmable: Exhaust fan 2 output or

ERV

or

System alarm output

Bottom Right Terminal Block

Y2- 1| 24 vac IN| Y2 in – Cooling Stage 2 Input from space thermostat
---|---|---
Y2- O| 24 vac OUT| Y2 out – Cooling Stage 2 Output to stage 2 mechanical cooling
Y1-I| 24 vac IN| Y1 in – Cooling Stage 2 Input from space thermostat
Y1- O| 24 vac OUT| Y1 out – Cooling Stage 2 Output to stage 2 mechanical cooling
C| COM| 24 vac Common
R| 24 vac| 24 vac Power (Hot)

Time-out and Screen Saver
When no buttons have been pressed for 10 minutes, the LCD dis-plays a screen saver, which cycles through the Status items. Each Status item displays in turn and cycles to the next item after 5 seconds.

START-UP AND OPERATION

Cooling with EconoMi$er X
For Occupied mode operation of EconoMi$er X, there must be a 24-v signal at terminals R and OCC (provided through PL6-3 from the unit’s IFC coil). Removing the signal at OCC places the EconoMi$er X control in Unoccupied mode. See Table 14 for Damper Position Control.
During Occupied mode operation, indoor fan operation will be ac-companied by economizer dampers moving to Minimum Position set point for ventilation. If indoor fan is off, dampers will close. During Unoccupied mode operation, dampers will remain closed unless a Cooling (by free cooling) or DCV demand is received.
When free cooling using outside air is not available, the uni t cooling sequence will be controlled directly by the space thermostat. Outside air damper position will be closed or
Minimu m Position as determined by Occupancy mode and fan signal.
When free cooling is available as determined by the appropriate changeover command (dry bulb, outdoor enthalpy, differential dry bulb, or differential enthalpy), a call for cooling (Y1 closes at th e thermostat) will cause the economizer control to modulate the dampers open and closed to maintain the unit supply air temperature. Default supply air temperature is 53°F, with a range of 38°F to 70°F. Compressor will not run.
Should 100% outside air not be capable of satisfying the space temperature, space temperature will rise until Y2 is closed. Th e economizer control will call for compressor operation. Dampers will modulate to maintain SAT set point concurrent with Com-pressor 1 operation. The “Low T Lock” setting (default 32°F) will lock out compressor operation when outside air temperature is be-low set point.
When space temperature demand is satisfied (thermostat Y1 opens), the dampers will return to Minimum Damper position if indoor fan is running or fully closed if fan is off.
If accessory power exhaust is installed, the power exhaust fan mo-tors will be energized by the economizer control as the dampers open above the EXH1 SET set point and will be energized as the dampers close below the EXH1 SET set point.
Damper movement from full closed to full open (or vice versa) will take between 1-1/2 and 2-1/2 minutes.
Heating with EconoMi$er X
During Occupied mode operation, indoor fan operation will be accompanied by economizer dampers moving to Minimum Position set point for ventilation. If indoor fan is off, dampers will close. During Unoccupied mode operation, dampers will remain closed unless a DCV demand is received.
When the room temperature calls for heat (W1 closes), the heating controls are energized.

Table 14 — Damper Position Control, 2-Speed Fan Motor, Economizer Cooling Not Available

$Carrier-CRECOMZR077A00-Horizontal-EconoMiser-X-Accessory- $48$$

TROUBLESHOOTING

For a list of common operating issues and concerns, see Table 15.
Power Loss (Outage or Brownout)
All set points and advanced settings are restored after any power loss or interruption, as all settings are stored in the Economizer controller’s non-volatile flash memory.
NOTE: If the power goes below 18 vac, the W7220 controller module assumes a power loss and the 5 minute power up delay will become functional when power returns above 18 vac.
Alarms
The economizer module provides alarm messages that display on the 2-line LCD.
NOTE: Upon power up, the module waits several seconds before checking for alarms. This allows time for all the configured devic-es (e.g., sensors, actuator) to become operational.
If one or more alarms are present and there has been no keypad ac-tivity for at least 5 minutes, the Alarms menu displays and cycles through the active alarms.

The Alarms menus can be navigated at any time. Refer to Table 11 for the Alarms menu.
CLEARING ALARMS
Once the alarm has been identified and the cause has been re-moved (e.g., replaced faulty sensor), the alarm can be cleared from the display.
To clear an alarm, perform the following:

Navigate to the desired alarm.
Press the button.
ERASE? displays.
Press the button.
ALARM ERASED displays.
Press the (Menu up/Exit) button to complete the action and return to the previous menu.
NOTE: If an alarm still exists after it has been cleared, it will redisplay within 5 seconds.

Table 15 — Operating Issues and Concerns

ISSUE OR CONCERN	POSSIBLE CAUSE AND REMEDY
My outdoor temperature reading on the STATUS menu is not accurate	Check

the sensor wiring:

Enthalpy sensors are to be wired to the S-Bus terminals.
Temperature sensors are to be wired to the OAT and MAT terminals.

If my enthalpy sensor drifts in accuracy over time, can I recalibrate it?| The sensor is not able to be re-calibrated in the field. However, there is a menu item under the ADVANCED menu to input a limited offset in temperature and humidity for

each sensor that is connected to the economizer.

Can I go back to factory defaults and start over?| Under the SYSTEM SETUP menu, you can change the set points to the factory defaults.
Will I be able to see the LCD screen when it is in the unit?| The LCD screen has a backlight that is always illuminated.
What is a good set point for the Mixed Air Temperature (MAT)?| The Mixed Air Temperature is the temperature of air to supply to the space. In a

commercial building, this is between 50°F and 55°F (10°C and 13°C). Mixed air is the combination of return air and outdoor air.

I am using enthalpy sensors. Why did the control ask me to input a dry bulb changeover temperature?| If the humidity sensor in the enthalpy sensors fails, the backup algorithm in the control is to default to the temperature sensor in the enthalpy sensor.
In checkout, the outdoor damper closes when I command it to open.| Check the actuator linkage or rotation. In the CHECKOUT mode, the outdoor damper should drive open or closed with the return air damper having the opposite effect.
How do I set my minimum position when using a CO 2 sensor?| The minimum position is set using the VENTMIN and VENTMAX setup in the SETPOINTS menu. VENTMIN is the minimum ventilation required when using an occupancy sensor and VENTMAX is the minimum ventilation when not using an occupancy sensor for Demand Control Ventilation. The VENTMAX position is set the same as with the potentiometer on the analog economizers and is the output voltage to the damper actuator. The range is 2 vdc closed OA damper and 10 vdc open OA damper.
What if my damper does not go completely closed in the checkout operation?| Check the damper linkage or hub to make sure the damper is able to close completely.
**How do I set the OCC?| There are two settings for the OCC setting: INPUT and ALWAYS. INPUT is from the space thermostat, if it has an occupancy output. ALWAYS is the unit in the occupied mode, if the economizer is powered (fan on).
Does the economizer save my program values if the unit loses power?| Yes, once the changes are stored in the controller they will be stored until they are changed by the operator.
If the unit is left in checkout, how long will the unit stay in checkout mode without input?**| The unit will remain in checkout for 10 minutes, then return to normal operation.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500253-01
Printed in U.S.A.
Form No. IIK-CRECOMZR77-04
Replaces: IIK-CRECOMZR77-03