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Part No. CRECOMZR077A00, CRECOMZR079A00,CRECOMZR081A00
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ACCESSORIES LIST . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
07-12 UNITS ONLY . . . . . . . . . . . . . . . . . . . . . . . . 12
Outside Air Enthalpy Sensor . . . . . . . . . . . . . . . . 15
Installing Differential Return Air Sensor . . . . . . . . . 16
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Demand Controlled Ventilation (DCV) . . . . . . . . . . 17
Fault Detection and Diagnostics . . . . . . . . . . . . . 17
AND SENSOR INFORMATION . . . . . . . . . . . . . . . 19
W7220 Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . 19
User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Using the Keypad with Menus . . . . . . . . . . . . . . . . . 19
Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Programming the W2770 Controller . . . . . . . . . . . . 19
Checkout Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
SETUP AND CONFIGURATION . . . . . . . . . . . . . . . . 25
W7220 Economizer Module Wiring . . . . . . . . . . . . . 25
Time-out and Screen Saver . . . . . . . . . . . . . . . . . . . 26
START-UP AND OPERATION . . . . . . . . . . . . . . . . . . 26
Cooling with EconoMi$er X . . . . . . . . . . . . . . . . . . . 26
Heating with EconoMi$er X . . . . . . . . . . . . . . . . . . . 26
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 27
Power Loss (Outage or Brownout) . . . . . . . . . . . . . 27
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
• CLEARING ALARMS
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:
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
Installation Instructions
Page
Printed in U.S.A.
Form No. IIK-CRECOMZR77-04
Small Rooftop Products
(48/50LC 14 Not Included)
Horizontal EconoMi$er X Accessory
•
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 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.
Pg 1
10-23
Select 3 to 15 Tons
Replaces: IIK-CRECOMZR77-03
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Related Manuals for Carrier CRECOMZR077A00
Summary of Contents for Carrier CRECOMZR077A00
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Page 1: Table Of Contents
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 • Follow all safety codes CONTENTS • Wear safety glasses and work gloves Page • Use care in handling and installing this accessory SAFETY CONSIDERATIONS . -
Page 2: General
The power exhaust set point is adjustable at the EconoMi$er X controller. See Tables 1-3 for package usage. See Table 4 for package con- tents. See Table 5 for sensor usage. Table 1 — Carrier Package Usage ECONOMI$ER X MODEL NUMBER PART NUMBER... - Page 3 EconoMi$er Horizontal Damper Small Cabinet Assembly with Actuator and HH79ZZ007 OA Sensor RGV/RAV/RHV 036-072 RGW/RAW/RHW 037-061 HW63AW002 (Honeywell: W7220) RGH/RAH/RHH 036-060 CRECOMZR077A00 Controller with Attached Harness RGX/RAX/RHX 036-060 HH77ZZ007 Mixed Air Temp Sensor RGS/RAS/RHS 036-072 (ring terminal) CRECOMZR077A00 Large Cabinet...
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Page 4: Accessories List
ACCESSORIES LIST Table 5 — EconoMi$er X Sensor Usage The EconoMi$er X system has several field-installed accessories ® ECONOMI$ER X WITH available to optimize performance. See Table 6 for authorized OUTDOOR AIR DRY BULB SENSOR APPLICATION parts and power exhaust descriptions. Accessories Required Outdoor Air ... -
Page 5: Installation
16. If the EconoMi$er X will be operating with an enthalpy out- INSTALLATION side air sensor, remove the factory-installed HH79ZZ007 dry For economizer component locations, see Fig. 1. For typical ac- bulb sensor from the front face of the economizer (see Fig. 1), cess panel locations, see Fig. - Page 6 FILTER Damper CLIP Outside Air CLEANABLE Temperature Sensor ALUMINUM FILTER OUTSIDE AIR RELIEF AIR ECONOMIZER P/N SHIP WT. Red Shipping Tape CRECOMZR077A00 25.1" 29.19" 95 lb CRECOMZR079A00 25.1" 37.25" 150 lb CRECOMZR081A00 24.81" 53.36" 245 lb Outside Air Fig. 3 — EconoMi$er X Hood Detail Damper Fig.
- Page 7 FRONT BLANK-OFF PANEL ECONOMI$ER X HORIZONTAL HOOD BLANK-OFF Fig. 8 — Horizontal Return Opening Blank-Off Panel Fig. 5 — Top View of EconoMi$er X Installation Outside Air Barometric Temperature Relief Dampers Sensor FRONT BLANK-OFF PANEL ECONOMI$ER X HOOD HVAC ACCESS DOOR Filters TO FILTERS Fig.
- Page 8 THERMOSTAT CENTER POST 2500 CONNECTION ACCESS PANEL 2000 1500 Small Cabinet Large and Extra 1000 Large Cabinet 0.05 0.15 0.25 RETURN DUCT STATIC PRESSURE (in. wg) HEATING ACCESS INDOOR FAN MOTOR PANEL ACCESS PANEL Fig. 11 — Barometric Flow Capacity Fig.
- Page 9 10-Pin Female Plug from Controller Central Terminal Board White Wire Unplug ECON Plug Fig. 18 — Connect 10-pin Plug to Central Terminal Board (CTB) Fig. 16 — Unplug ECON plug from Central Terminal Board (CTB) Central Terminal Board Fig. 19 — Connect Red and Brown Wires to Central Terminal Board (CTB) Fig.
- Page 10 Controller Harness Control Indoor Blower Section NOTE: Some control box configurations may differ. Fig. 22 — Route 48TMHSRSE--A20 Harness to Indoor Blower Section Fig. 20 — Connect Ground Wire From Controller 4-pin Male Plug 48TMHSRSE--A20 From Controller Harness Connect (2) green wires from HH79ZZ007/1185188 sensor to the brown...
- Page 11 Pink and Violet Wires from 48TMHSRSE--A20 Harness Indoor Blower Fig. 24 — Connect Pink and Violet Wires in Indoor Blower Section ECONOMIZER RETURN CHAMBER INDOOR BLOWER SECTION UNIT CONTROL BOX COMPARTMENT Dry Bulb 48TMHSRSE--A20 Outside Air Harness with Mixed Air Sensor Sensor 50HE403859 4-Pin Male...
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Page 12: Instructions For 48/50Lc
The 48/50LC 07-12 units that do not have a factory-installed economizer will have a new W7220 controller wiring harness shipped in the control box section of the HVAC unit. This harness, Carrier part number 48LCHSRADH-A00, is shown Fig. 26 — Remove Complete Harness in Fig. 28 and 29. - Page 13 Fig. 29 — 48LCHSRADH-A00 W7220 Controller Harness Shipped With 48/50LC 07-12 Units...
- Page 14 NOTE: Harness attached to the W7220 controller from the Carrier factory is removed and not used with 48/50LC 07-12 units. Fig. 30 — Typical EconoMi$er X Wiring Diagram For 48/50LC 07-12 Units...
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Page 15: Installing Optional Hh57Ac081/1185124 Single Outside Air Enthalpy Sensor
Installing Optional HH57AC081/1185124 Single Outside Air Enthalpy Sensor When using the HH57AC081/1185124 (Honeywell C7400S) en- 51/64 (21) thalpy 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 4-1/4 (108) (refer to Fig. -
Page 16: Installing Differential Return Air Sensor
Table 8 — HH57AC081/1185124 Sensor DIP Switch 12-Pin Female Plug From Economizer DIP SWITCH POSITIONS FOR SWITCHES 1, 2, AND 3 LEGEND — Discharge Air or Supply Sensor — Return Air — 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. -
Page 17: California's Title 24 High Temperature Limit
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 tempera- tures vary by region within California. See Table 9 for high limit Black Wire settings. - Page 18 W7220 Economizer Controller Module AUX2-I E-GND EXH1 AUX1-O IAQ (2-10V) IAQ COM IAQ 24V ACT (2-10V) ACT COM ACT 24V Controller Setting: Under the “System Setup” menu, set AUX1-OUT to “SYS” which will close controller relay on fault detection. Annunciator Light* *Examples of annunciator lights would include these Grainger lights: - Item #20C841...
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Page 19: General W7220 Controller And Sensor Information
GENERAL W7220 CONTROLLER Using the Keypad with Settings and Parameters AND SENSOR INFORMATION To use the keypad when working with set points, system and ad- vanced settings, checkout tests, and alarms: W7220 Economizer Navigate to the desired menu. The economizer controller used on electromechanical units is a Honeywell W7220, which is located in the RTU base unit’s Con- Press the (Enter) button to display the first item in the... - Page 20 SETPOINTS • MIN POS H and MIN POS L: If your unit is 2 speed, there will be 2 minimum position settings that show up on the • MAT SET: this sets the mixed air temperature (MAT) set- menu. The first is MIN POS H (for high speed), which has ting.
- Page 21 Table 11 — 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 22 Table 11 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT ENERGY RECOVERY UNIT RELAY OUTPUT Output of AUX terminal; displays only if AUX = ERV ON/OFF ON = relay closed OFF = relay open STATUS MECH COOL ON 0 0, 1, or 2...
- Page 23 Table 11 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT EXHAUST FAN 1 SETPOINT AT LOW SPEED EXH1 L SET 0 to 100% On 2 speed or 3 speed with 1 heat and 2 cool. Based on economizer OA damper position to activate power exhaust.
- Page 24 Table 11 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT RETURN AIR TEMPERATURE CALIBRATION RA T CAL 2.0°F (or °C) ±2.5°F (±1.4°C) Allows for the operator to adjust for an out of calibration return air temperature (RA) sensor RETURN AIR HUMIDITY CALIBRATION RA H CAL...
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Page 25: Checkout Tests
Checkout Tests SETUP AND CONFIGURATION Use the Checkout menu (refer to Table 11) to test the damper op- W7220 Economizer Module Wiring eration and any configured outputs. Only items that are configured See Fig. 38 and Tables 12 and 13 to locate the wiring terminals for are shown in the Checkout menu. -
Page 26: Time-Out And Screen Saver
During Occupied mode operation, indoor fan operation will be ac- Table 13 — Economizer Module — Right Hand companied by economizer dampers moving to Minimum Position Terminal Blocks set point for ventilation. If indoor fan is off, dampers will close. During Unoccupied mode operation, dampers will remain closed LABEL TYPE... -
Page 27: Troubleshooting
The Alarms menus can be navigated at any time. Refer to Table 11 TROUBLESHOOTING for the Alarms menu. For a list of common operating issues and concerns, see Table 15. CLEARING ALARMS Power Loss (Outage or Brownout) Once the alarm has been identified and the cause has been re- All set points and advanced settings are restored after any power moved (e.g., replaced faulty sensor), the alarm can be cleared from loss or interruption, as all settings are stored in the Economizer... - Page 28 © 2023 Carrier 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 Pg 28 10-23 Replaces: IIK-CRECOMZR77-03...
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