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MicroMetl ECC-MRT69CA-D2 Install Manual

Economizer
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Economizer
ECC-MRT69CA-D2
Install Guide
Foremost HVAC Accessory Manufacturer

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Summary of Contents for MicroMetl ECC-MRT69CA-D2

  • Page 1 Economizer ECC-MRT69CA-D2 Install Guide Foremost HVAC Accessory Manufacturer...
  • Page 2 Table of Contents Topic Topic Page Number Page Number General Install Instructions Honeywell Wiring Diagram Honeywell Manual...

  • Page 3: Safety Considerations

    Unpack and inspect economizer contents from carton. Contact and NOTE. These words are used with the safety-alert symbol. MicroMetl immediately if any parts are missing or damaged. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards...

  • Page 4: Vertical Installation

    * Includes 9901-2022 sensor and wiring harness. side of the shroud. Connect the pink and violet (OAT) harness if MicroMetl accessories simplify and minimize procedures on you have the 9901-2021 dry bulb sensor or the gray (S-Bus) rooftop applications. Read these instructions completely before harness to the enthalpy sensor.
  • Page 5 10. Install the upper economizer panel over the economizer’s outside air damper, and above the bottom panel. Screw panel in place and screw panel into economizer in 2 places. (See Figs 7 and 8.) Note: If using economizer on 57 3/8" tall unit, install 8" outside air blank off panel above upper economizer panel, Harness/Plug see Figure 3.

  • Page 6: Horizontal Installation

    Harness the return air to enter the unit underneath the outside air hood. MicroMetl also offers an ECE-MRT69CA Series economizer that allows the return air to enter the unit through the HVAC unit horizontal return opening on the side of the unit. Contact MicroMetl factory for details.
  • Page 7 Install the (provided) bottom panel with the horizontal return duct opening on the unit. (See Figs 11 and 12.) Screw panel in place 10. Install the upper economizer panel in place over the economizer’s outside air damper, and above the bottom panel. Screw panel in place and screw panel into economizer in 2 places.
  • Page 8 Apply Seal Strip to the back of these surfaces Apply Seal Strip to the back of these flanges Apply Seal Strip Item No. Part Number Qty. to the back of this flange HDC69CA17 HDC69CA18 HDC69CA19 HDC69CA20 HDC69CA21 HDC69CA22 HDC69CA23 Fig. 13 - Hood Assembly Fig.
  • Page 9 Unit Outdoor Air Hood Relief Opening 15 18 3/4" 5/16" 15 5/16" 19 1/2" 34 3/4" Return Duct Fig. 16A - Relief Damper Hole (49 3/8" Tall Unit Shown) Outdoor Air Hood Field Supplied Return Duct 19 1/2" HDRA-HE1525L-CD Blade Bracket Relief Hood (Provided with Unit) Relief Door...
  • Page 10 MicroMetl For Vertical and Horizontal Applications: **INSTRUCTIONS FOR VANE AXIAL BLOWER FAN UNITS WITH UNIT CONTROL BOARD (UCB)** Since 1965 If you have an older 48/50TC or HC unit with a Central Terminal Board. You will need to purchase a 1002-0475 harness or 9962-0475 harness from TX.
  • Page 11 Wiring Diagram Supplement For Installing JADE W7220 Economizer on Unit with Vane Axial Indoor Fan (with Unit Control Board HK50AA055 or HK50AA058) ECONOMIZER RETURN CHAMBER INDOOR BLOWER SECTION UNIT CONTROL BOX COMPARTMENT 9901-2021 9901-2021 Dry bulb Outside Air Mixed Air Sensor Sensor Field Mount on Indoor Blower...
  • Page 12 Wiring Diagram For Installing JADE W7220 Economizer on Unit with Central Terminal Board (CTB) ECONOMIZER RETURN CHAMBER INDOOR BLOWER SECTION UNIT CONTROL BOX COMPARTMENT 9901-2021 9901-2021 9962-0407-SAOEXT Dry bulb Outside Air Mixed Air Sensor Harness with Sensor Field Mount on 4-Pin Female Plug 4-Pin Male 12-Pin Female...
  • Page 13 Typical Wiring Diagram For 1 and 2 Speed Units (2 Speed Diagram Shown)
  • Page 14 INSTALLING DIFFERENTIAL RETURN AIR SENSOR CALIFORNIA’S TITLE 24 HIGH TEMPERATURE LIMIT SETTINGS REQUIRED HIGH LIMIT HIGH LIMIT (ECONOMIZER OFF CLIMATE DEVICE TYPE* WHEN): ZONES DESCRIPTION FIXED DRY BULB California Title 24 DIFFERENTIAL DRY BULB FIXED ENTHALPY + FIXED DRY BULB 9901-2022 (C7400S) Dimensional, connection and switching Wiring Differential Return Air Sensor...

  • Page 15: Demand Control Ventilation

    DEMAND CONTROL VENTILATION CO2 wiring connections to Jade controller REMOTE (DOWNSTAIRS) MONITORING OF CONTROLLER’S FAULT DETECTION AND DIAGNOSTICS SYSTEM SETUP AUX1-OUT TH8321WF TH8321R W7220 Economizer Controller Module Thermostat Wired For Remote FDD Annunciator Light Wired for Remote FDD Annunciator Light*...
  • Page 16 MicroMetl Instructions for 48/50LC 07-12 Units Only Since 1965 Step LC1 Step LC2 Step LC3 Remove Complete Harness Factory-Attached to W7220 Controller 9962-0407-SAOEXT Not Used on 48/50LC 07-12 Units 48LCHSRADH--A00 W7220 Controller Harness Shipped With 48/50LC 07-12 Units...
  • Page 17 Step LC4 Step LC5 Step LC6 Step LC7 Some Economizer Models: Photo of 48LCHSRAD—A00 W7220 Controller Harness Shipped With 48/50LC 07-12 Units Other Economizer Models: Step LC9 Use Part of 9962-0407-SAOEXT Harness for MAT Sensor on LC Units...
  • Page 18 Typical Wiring Diagram For 48/50LC 07-12 Units NOTES:...
  • Page 19 MicroMetl General Jade W7220 Controller and Sensor Information Since 1965 W7220 ECONOMIZER Using the Keypad with Settings and Parameters The economizer controller used on electro mechanical units is the To use the keypad when working with Setpoints, System Setup Honeywell W7220 which is to be located in the RTU base unit’s Advanced Settings, Checkout Tests and Alarms: Control Box.

  • Page 20: System Setup

    MicroMetl Since 1965 SETPOINTS PROGRAMMING THE JADE W7220  MAT SET: this sets the mixed air temperature (MAT) setting. CONTROLLER The controller has a default of 53 degrees, but the range is anywhere from 38 to 70 degrees F. The next several pages detail the different status displays, setpoints, setup, and alarms available on the controller.
  • Page 21 MicroMetl Since 1965 Table 11 Menu Structure* Parameter Parameter Menu Parameter Default Notes Range and Increment Value ECON AVAIL YES/NO ECONOMIZING AVAILABLE YES = economizing available; the system can use outside air for free cooling when required ECONOMIZING YES/NO ECONOMIZING ACTIVE YES = Outside air being used for 1st stage cooling.
  • Page 22 MicroMetl Since 1965 Table 11 Menu Structure (cont)* Parameter Parameter Menu Parameter Default Range and Notes Value Increment ON/OFF ON = relay closed OFF = relay open ON/OFF ENERGY RECOVERY UNIT RELAY OUTPUT STATUS ON = relay closed (cont) OFF = relay open...
  • Page 23 MicroMetl Since 1965 Table 11 Menu Structure (cont)* Parameter Parameter Menu Parameter Default Notes Range and Increment Value INSTALL 01/01/10 Display order = MM/DD/YY Setting order = DD, MM, then YY. UNITS DEG °F or °C Sets economizer controller in degrees Fahrenheit or Celsius.

  • Page 24: Checkout Tests

    MicroMetl Since 1965 Table 11 Menu Structure (cont)* Parameter Parameter Menu Parameter Default Notes Range and Increment Value DAMPER VMIN .HS Positions OA damper to VMIN High Speed position DAMPER OPEN Positions OA damper to the full open position. DAMPER CLOSE...

  • Page 25: W7220 Economizer Module Wiring

    MicroMetl Since 1965 W7220 ECONOMIZER MODULE WIRING Use tables 12 and 13 to locate the wiring terminals for the Economizer module. Table 13 - Economizer Module - Table 12 - Economizer Module - Right Hand Terminal Blocks Left Hand Terminal Blocks...

  • Page 26: Start-Up And Operation

    MicroMetl Since 1965 START-UP AND OPERATION Cooling with Economizer — For Occupied mode operation of Should 100% outside air not be capable of satisfying the space economizer, there must be a 24-v signal at terminals R and OCC temperature, space temperature will rise until Y2 is called for. The economizer control will call for compressor operation.

  • Page 27: Troubleshooting

    MicroMetl Since 1965 TROUBLESHOOTING Clearing Alarms — For a list of common operating issues and concerns see Table 15. cause has been removed (e.g. replaced faulty sensor). They can Power Loss (Outage or Brownout) — All setpoints and advanced be cleared from the display.

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