Carrier CRECOMZR076A00 Installation Instructions Manual
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Carrier CRECOMZR076A00 Installation Instructions Manual

Carrier CRECOMZR076A00 Installation Instructions Manual

Small rooftop products select 3 to 15 tons
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Part No: CRECOMZR076A00, CRECOMZR078A00 and CRECOMZR080A00
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ACCESSORIES AND COMPLIANCE . . . . . . . . . . . . . 3
Accessories List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
ONLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Enthalpy Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Fans Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Demand Controlled Ventilation . . . . . . . . . . . . . . . . 16
Detection and Diagnostics . . . . . . . . . . . . . . . . . . 17
INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
W7220 Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . 18
User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Using the Keypad with Menus . . . . . . . . . . . . . . . . . 18
Programming the W7220 Controller . . . . . . . . . . . . 19
Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Checkout Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
W7220 Economizer Module Wiring . . . . . . . . . . . . . 24
START-UP AND OPERATION . . . . . . . . . . . . . . . . . . 25
Cooling with EconoMi$er X . . . . . . . . . . . . . . . . . . . 25
Heating with EconoMi$er X . . . . . . . . . . . . . . . . . . . 25
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 26
Power Loss (Outage or Brownout) . . . . . . . . . . . . . 26
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480357-01
Vertical - Low Leak EconoMi$er
Installation Instructions
Page
Printed in U.S.A.
Form IIK-CRECOMZR76-04
Small Rooftop Products

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
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
. 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.
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.
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.
Pg 1
6-22
Select 3 to 15 Tons
®
X Accessory
DANGER
Replaces: IIK-CRECOMZR76-03

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  • Page 1: Table Of Contents

    Select 3 to 15 Tons Vertical - Low Leak EconoMi$er ® X Accessory Installation Instructions Part No: CRECOMZR076A00, CRECOMZR078A00 and CRECOMZR080A00 CONTENTS SAFETY CONSIDERATIONS Page Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only SAFETY CONSIDERATIONS .

  • Page 2: General

    Table 1 — Carrier Usage Chart CAUTION ECONOMI$ER X CARRIER MODEL NUMBER PART NUMBER PERSONAL INJURY HAZARD Small Cabinet Failure to follow this caution can result in personal injury and 48/50FC 04-07 damage to the unit. 50FCQ04-07 48/50GC 04-06 Cover the duct opening as a precaution so objects cannot fall into the return duct opening.

  • Page 3: Accessories And Compliance

    Outdoor Air The HH79ZZ007 outdoor air dry bulb sensor is Dry Bulb factory installed on economizer. RGW/RAW/RHW 036-060 Mixed Air HH79ZZ007 provided with economizer and field RGH/RAH/RHH 036-060 CRECOMZR076A00 Sensor installed in blower compartment. RGS/RAS/RHS 072 Single HH57AC081 RGX/RAX/RHX 036-060 Enthalpy...

  • Page 4: Compliance

    Insert Screw in EconoMi$er X Actuator EconoMi$er X EconoMi$er X Flanges Wiring Harness Fig. 4 — EconoMi$er X Installed on HVAC Unit (CRECOMZR076A00 Shown HH79AH001 Outside Air Temperature Sensor Barometer Relief Outside Dampers Air Damper Fig. 1 — EconoMi$er X Component Locations...
  • Page 5 Unit Base EconoMi$er X Rear Flange Fig. 5 — Rear EconoMi$er X Flange Installation (CRECOMZR076A00 and CRECOMZR078A00) Remove and save the 12-pin jumper plug from the unit economizer harness – located in the upper left corner of the unit. Insert the EconoMi$er X plug into the unit wiring harness.
  • Page 6 Fig. 12 — Connect Red and Brown Wires to Central Terminal Board 16. Locate the green wire with yellow stripe from the controller harness and screw it to the control box (ground). (See Fig. 13.) Fig. 10 — Connect 10-pin Plugs Together 13.
  • Page 7 19. Screw the HH79ZZ007 mixed air (MAT) sensor to the left side edge of indoor blower through pre-punched holes, see Fig. 16. Confirm that the screws do not interfere with blower rotation. Connect the (2) spade terminals on the HH79ZZ007 sensor to the orange and brown wires from the 4-wire 48TMHSRSE--A20 Harness.
  • Page 8 Wires from 48TMHSRSE--A20 Harness Indoor Hood Top And Blower Side Assembly Hood Divider ECONOMIZER P/N SHIP WT. CRECOMZR076A00 30.37” 17.43” 19.05” 29.5” 55 lb CRECOMZR078A00 40.37” 22.28” 24.48” 36.27” 80 lb CRECOMZR080A00 52.92” 27.03” 33.41” 49.92” 98 lb Fig. 18 — Connect Pink and Violet Wires in Indoor...
  • Page 9 2500 2000 Hood Filter 1500 CRECOMZR076A00 Divider CRECOMZR078A00 Fig. 20 — Filter Divider on CRECOMZR080A00 Hood 1000 CRECOMZR080A00 24. Install aluminum filter(s) in EconoMi$er X hood. Clips at top of hood will hold filters in place.
  • Page 10 ECONOMIZER RETURN CHAMBER INDOOR BLOWER SECTION UNIT CONTROL BOX COMPARTMENT Dry Bulb 48TMHSRSE-A20 Mixed Air Sensor Outside Air Field Mount on Harness with Sensor Indoor Blower 4-Pin Female Plug 4-Pin Male HH79ZZ007 HH79ZZ007 Plug 12-Pin Female Plug from Economizer Economizer Harness In Unit 10-Pin Male...

  • Page 11: Installation Instructions For 48/50Lc 07-12 Units

    W7220 controller wiring harness shipped in the control box section of the HVAC unit. This Fig. 27 — 48TMHSRSE--A20 harness, Carrier part number 48LCHSRADH--A00, is shown NOT Used on 48/50LC 07-12 Units in Fig. 28 and 29.

  • Page 12: Installing Optional Hh57Ac081 Single Outside Air

    1. Harness shown in bold is 48LCHSRADH--A00 harness, which is shipped in the control box of 48/50LC 07-12 units and must be field connected to the W7220 controller provided with the economizer. 2. Harness attached to the W7220 controller from the Carrier factory is removed and not used with 48/50LC 07-12 units. Fig. 30 — Typical Wiring Diagram For 48/50LC 07-12 Units...
  • Page 13 Economizing Dual Enthalpy Available High Limit Not Available Single Enthalpy P2 (T,RH) (T,RH) Temperature Fig. 31 — Enthalpy Curve Boundaries Table 7 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY CURVE...

  • Page 14: Installation Instructions For Units With Vane Axial

    Connect the 12-pin male plug (C) of the adapter Installation Instructions for Units with Vane PN# 48TC003198 to the UCB ECON plug. (See Fig. 35.) Axial Fans Only Connect the 10-pin male (E) plug onto PN# 48TC003198 UNIT ECONOMI$ER X HARNESS ADAPTER KIT adapter to the 10-pin female plug from W7220 controller.
  • Page 15 Fig. 36 — Typical Wiring Diagram for 48/50FC 04-16 and 48/50GC 04-14...

  • Page 16: Installing Differential Return Air Sensor

    Installing Differential Return Air Sensor Table 9 — California Title 24 Regional High Limit Dry Bulb Temperature Settings The CRDIFRASN01A00 differential return sensor kit must be TABLE 140.4-B AIR ECONOMIZER HIGH LIMIT SHUT OFF field mounted in the system’s return duct work. The kit includes a CONTROL REQUIREMENTS wiring harness that connects the EconoMi$er X harness in the return chamber of the unit to the provided HH57AC081 sensor.

  • Page 17: 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 18: General W7220 Controller And Sensor Information

    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 Control Box. See the base unit’s Installation Instructions for the location of the Control Box access panel. The W7220 controller provides the following: •...

  • Page 19: Programming The W7220 Controller

    SYSTEM SETUP Programming the W7220 Controller The next several pages detail the different status displays, set • INSTALL: Allows you to set the current date. Use the points, setup, and alarms available on the controller. The list below keypad buttons to scroll to the correct date. and Table 10 summarize the inputs required for a standard •...
  • Page 20 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 21 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 22 Table 11 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT 0°F to 50°F ENERGY RECOVERY VENTILATION UNIT OUTDOOR AIR ERV OAT SP 32°F (0°C) (–18°C to 10°C); TEMPERATURE SETPOINT increment by 1° Only displayed when AUX1 O = ERV Exhaust fan set point for single speed units.
  • Page 23 Table 11 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT OUTSIDE AIR TEMPERATURE CALIBRATION OA T CAL 0.0°F (or °C) ±2.5°F (±1.4°C) Allows for the operator to adjust for an out of calibration outside air temperature (OAT) sensor OUTSIDE AIR HUMIDITY CALIBRATION OA H CAL...

  • Page 24: Checkout Tests

    Checkout Tests Table 12 — Economizer Module — Left Hand Use the Checkout menu (see Table 11) to test the damper Terminal Blocks operation 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 25: Start-Up And Operation

    Should 100% outside air not be capable of satisfying the space START-UP AND OPERATION temperature, space temperature will rise until Y2 is called for. The Cooling with EconoMi$er X economizer control will call for compressor operation. Dampers will modulate to maintain MAT at set point concurrent with For Occupied mode operation of EconoMi$er X system, there ®...

  • Page 26: Troubleshooting

    The Alarms menus can be navigated at any time. See Table 11 for TROUBLESHOOTING 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 setpoints and advanced settings are restored after any power moved (e.g.
  • Page 28 © 2022 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480357-01 Printed in U.S.A. Form IIK-CRECOMZR76-04 Pg 28 6-22 Replaces: IIK-CRECOMZR76-03...

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Crecomzr078a00Crecomzr080a00

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