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IMPORTANT: Read these instructions completely before
attempting to install accessory economizer.
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ACCESSORIES AND COMPLIANCE . . . . . . . . . . . . . 3
Accessories List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installing Optional HH57AC081 Single Outside Air
Enthalpy Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Demand Controlled Ventilation . . . . . . . . . . . . . . . . 10
Detection and Diagnostics . . . . . . . . . . . . . . . . . . 11
INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
W7220 Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . 12
User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Using the Keypad with Menus . . . . . . . . . . . . . . . . . 12
Programming the W7220 Controller . . . . . . . . . . . . 12
Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Checkout Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
W7220 Economizer Module Wiring . . . . . . . . . . . . . 18
START-UP AND OPERATION . . . . . . . . . . . . . . . . . . 19
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 20
Power Loss (Outage or Brownout) . . . . . . . . . . . . . 20
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480391-01
Horizontal - Low Leak EconoMi$er X Accessory
Installation Instructions
Part No: CRECOMZR085A00
®
X . . . . . . . . . . . . . . . . . . 19
®
X . . . . . . . . . . . . . . . . . . 19
Printed in U.S.A.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
Page
cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit, and other safety
precautions that may apply.
Follow all safety codes, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire
extinguisher available for all brazing operations.
It is important to recognize safety information. This is the safety-
alert symbol
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.
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.
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.
Form IIK-CRECOMZR85-01
Pg 1
Small Rooftop Products
Select 7.5 to 12.5 Tons
. When you see this symbol on the unit and in
DANGER
CAUTION
3-22
Replaces: NEW

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Summary of Contents for Carrier CRECOMZR085A00

  • Page 1: Table Of Contents

    Small Rooftop Products Select 7.5 to 12.5 Tons Horizontal - Low Leak EconoMi$er X Accessory Installation Instructions Part No: CRECOMZR085A00 SAFETY CONSIDERATIONS IMPORTANT: Read these instructions completely before Installation and servicing of air-conditioning equipment can be attempting to install accessory economizer.
  • Page 2: General

    HH79HH001 Mixed Air Temp Sensor* Hood Assembly with Top and 2 Sides Hood O/A Panel GENERAL Aluminum Filter CRECOMZR085A00 The EconoMi$er ® X system utilizes the latest technology Hardware Bag* available for integrating the use of free cooling with mechanical Sensor Harness 50HE403859* cooling for packaged rooftop units.
  • Page 3: Accessories And Compliance

    Damper Economizers meet IECC Fault Detection and Diagnostic Fig. 1 — EconoMi$er X Component Locations requirements. (CRECOMZR085A00 Shown) NOTE: IECC requires differential return air sensor, which must be ordered separately. See Accessory CRDIFRASN01A00. INSTALLATION See Fig. 1 for component locations.
  • Page 4 Rooftop Unit’s 12-Pin Male Plug EconoMi$er X 12-Pin Female Plug Economizer Fig. 5 — Connect EconoMi$er X Harness to Unit PL6 Economizer Harness Fig. 3 — Economizer Installed in R/A Section Filler Panel O/A Panel Filter Access Fig. 4 — Attach O/A Panel Fig.
  • Page 5 NOTE: Some control box configurations may differ. Fig. 10 — Mount Controller Assembly in Unit Control Box Duct work not shown. Fig. 8 — Attach Relief Damper Hood Assembly to Return Duct 14. Remove the indoor blower access panel and the panel(s) covering the unit control box.
  • Page 6 Controller Harness Control Indoor Blower Section Fig. 12 — Connect 12-pin Plugs Together NOTE: Some control box configurations may differ. Fig. 15 — Route SAT and OAT Wires to Indoor Blower Section 18. Connect the brown wire from the controller harness to the UCB.
  • Page 7 To Control Box PL6 Ref Bundle these connections into the corner post with wire tie W7220 To Control Box SAT Sensor Bundle these connections into the corner post with wire tie W7220 Ring Terminal Fig. 16 — Supply Air Sensor Installation W7220 (Vane Axial Fan System) Fig.
  • Page 8: Enthalpy Sensor

    Installing Optional HH57AC081 Single Outside Air Enthalpy Sensor HOOD When using the HH57AC081 (Honeywell C7400S) enthalpy sensor (see Fig. 21) for outside air changeover, the existing HH79AH001/HH79ZZ007 dry bulb sensor must be removed. The ALUMINUM FILTER enthalpy sensor will be mounted in the same location as the dry bulb sensor (see Fig.
  • Page 9 Fig. 22 — Enthalpy Curve Boundaries Table 6 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY CURVE BULB (°F) DEWPOINT (°F) (btu/lb/da) TEMP. (°F) TEMP. (°F) (%RH) (%RH) 28.0 36.8 66.3...
  • Page 10: Installing Differential Return Air Sensor

    Installing Differential Return Air Sensor Table 7 — California Title 24 Regional High Limit Dry The CRDIFRASN01A00 differential return sensor kit must be Bulb Temperature Settings/ field mounted in the system’s return duct work. The kit includes a Air Economizer High Limit Shut Off Control wiring harness that connects the EconoMi$er X harness in the Requirements return chamber of the unit to the provided HH57AC081 sensor.
  • Page 11: Remote (Downstairs) Monitoring Of Controller's Fault Detection And Diagnostics

    Remote (Downstairs) Monitoring of Controller’s FURNACE, AIR HANDLER, Fault Detection and Diagnostics OR RTU Many codes including IECC, Title 24, and ASHRAE 90.1 require that the economizer’s faults be accessible by operating or service personal, or annunciated locally on zone thermostat. To setup remote monitoring on the controller, under SYSTEM SETUP, AUX2-1 AUX1-OUT must be set to SYS.
  • Page 12: General W7220 Controller And Sensor

    Press the (Enter) button to display the value of the cur- GENERAL W7220 CONTROLLER AND SENSOR rently displayed item. INFORMATION Press the ▲ button to increase the displayed parameter value. W7220 Economizer Press the ▼ button to decrease the displayed parameter value. The economizer controller used on electromechanical units is a Honeywell W7220, which is located in the RTU base unit’s NOTE: When values are displayed, pressing and holding the ▲or...
  • Page 13: Menu Structure

    Menu Structure IMPORTANT: Table 9 illustrates the complete hierarchy. Menu Table 9 illustrates the complete hierarchy of menus and parame- parameters may be different depending on configuration. For ters for the EconoMi$er X system. example, none of the DCV parameters appear for a system that The Menus in display order are: does not have a DCV (CO ) sensor.
  • Page 14 Table 9 — Menu Structure PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT ECONOMIZING AVAILABLE ECON AVAIL YES/NO YES = economizing available; the system can use outside air for free cooling when required ECONOMIZING ACTIVE ECONOMIZING YES/NO YES = Outside air being used for first stage cooling NO = Economizing not active OCCUPIED YES = OCC signal received from space thermostat or unitary controller...
  • Page 15 Table 9 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT 38°F to 65°F MIXED AIR SET POINT MAT SET 53°F (12°C) (3°C to 18°C); Set point determines where the economizer will modulate the OA damper to maintain increment by 1°...
  • Page 16 Table 9 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT Display order = MM/DD/YY INSTALL 01/01/10 Setting order = DD, MM, then YY UNITS DEG °F °F or °C Sets economizer controller in degrees Fahrenheit or Celsius. EQUIPMENT CONV Conventional or HP...
  • Page 17 Table 9 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT Alarms display only when they are active. The menu title “ALARMS(_)” includes the number of active alarms in parentheses ( ). When using SYLK bus sensors, “SYLK” will appear on the screen, and when using 20k OA temperature sensors, “SENS T” will appear on the screen MIXED AIR TEMPERATURE SENSOR ERROR MA T SENS ERR Mixed air sensor has failed or become disconnected - check wiring then replace...
  • Page 18: Checkout Tests

    Checkout Tests Table 11 — Economizer Module — Right Hand Use the Checkout menu (see Table 9) to test the damper operation Terminal Blocks and any configured outputs. Only items that are configured are shown in the Checkout menu. LABEL TYPE DESCRIPTION NOTE: See User Interface for information about menu navigation...
  • Page 19: Start-Up And Operation

    economizer control will call for compressor operation. Dampers START-UP AND OPERATION will modulate to maintain MAT at set point concurrent with ® Cooling with EconoMi$er Compressor 1 operation. The “Low T Lock” setting (default 32°F) will lock out compressor operation when outside air temperature For Occupied mode operation of EconoMi$er X system, there is below setpoint.
  • Page 20: Troubleshooting

    The unit will remain in checkout for 10 minutes, then return to normal operation. checkout mode without input? © 2022 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

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