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Installer's Guide
Down Discharge Economizer and Rain Hood
Model:
BAYECON105A
BAYECON106A
BAYRLAY004B
Note: * indicates an alphanumeric character.
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilat-
ing, and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted
or altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all
precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.
November 2024
Used with:
*DC*, *TC*, *WC*, *YC**018-036
*DC*, *TC*, *WC*, *YC**042-060
(Relay required in
*WC*
SAFETY WARNING
18-HE137D1-1A-EN
Units)
Note: "Graphics in this document are for
representation only. Actual model may
differ in appearance."
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Summary of Contents for Trane BAYECON105A
- Page 1 Installer’s Guide Down Discharge Economizer and Rain Hood Model: Used with: BAYECON105A *DC*, *TC*, *WC*, *YC**018-036 BAYECON106A *DC*, *TC*, *WC*, *YC**042-060 BAYRLAY004B (Relay required in Units) *WC* Note: “Graphics in this document are for representation only. Actual model may differ in appearance.”...
- Page 2 INSTALLER’S GUIDE WARNING: HAZARDOUS VOLTAGE - DISCONNECT POWER BEFORE SERVICING ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES IMPORTANT - This Document is customer property and is to remain with this unit. Please return to service information pack upon completion of work.
- Page 3 Notes: • BAYECON105A/106A will have one of the RA blade brackets behind the bottom gear. Once economizer is set inside the unit, carefully push the bottom/back side of the economizer to pop the bracket off behind the gear to be able to lay the back of the economizer on your unit.
- Page 4 INSTALLER’S GUIDE *DC*, *TC*, *WC*, *YC* Units Top Sealing Flange Horizontal Return Air Panel Down Flow Return Air Panel Coil Access Panel Control Box Access Panel Blower Access Panel Figure 3. Remove Panels 4. Install Rain Hood Assembly 2. Continue routing the remaining harness through the grom- met in the Control Box partition and into the Control Box.
- Page 5 INSTALLER’S GUIDE DC, TC, YC, WC Unit Insert economizer in folded shipping position Economizer actuator and controller Dry bulb outside air temperature sensor Figure 4. Insert Economizer in Shipping Position 1.) Swing Down Return Air Damper Economizer Return Air Damper 3.) Install Gear and E-Cips 2.) Insert Assembly screw...
- Page 6 INSTALLER’S GUIDE Economizer outline P-clamp In parts bag Economizer and Return Air Damper Install two (2) screws into holes. Leave extended from unit 1/2". Apply gasket between damper assembly and hood. Figure 6. Start Economizer’s Front Mounting Screws Top flange of hood slides under HVAC unit’s top sealing flange...
- Page 7 INSTALLER’S GUIDE Unit Application Economizer Models *DC*, *TC*, *WC*, *YC* BAYECON105A 20.125” *018-036 *DC*, *TC*, *WC*, *YC* BAYECON106A 24.375” *042-060 Economizer rain hood Outside air dampers Return air Required filter dampers kit, order separately Mist eliminator (filter) Relief damper Return Duct Roofcurb Figure 8.
- Page 8 INSTALLER’S GUIDE Coil Grommet View ‘A’ 3.) Pull the two (2) Mixed Air Sensor Wires (with female 2.) Continue quick connects) from the 1.) From Economizer- Routing Behind Harness and Route Down Assembly, Pass Wire Compressor Near the Mixed Air Sensor. Harness Through Coil Compartment Connect to sensor...
- Page 9 INSTALLER’S GUIDE 5TCC/YCC Figure 11. Economizer Connection Diagram...
- Page 10 INSTALLER’S GUIDE Figure 12. 5WCC Economizer Connection Digram...
- Page 11 INSTALLER’S GUIDE Figure 13. 2/4TC*/YC* Economizer Connection Digram (“*” May Be “C”, “X”, “Y”)
- Page 12 INSTALLER’S GUIDE Figure 14. 2/4WC* Economizer Connection Digram (“*” May Be “C”, “X”, “Y”)
- Page 13 INSTALLER’S GUIDE Table 1. Motor Operation Checkout DRIVE MOTOR OPEN DRIVE MOTOR CLOSED SPRING RETURN Power to TR and TR1, jumper Disconnect jumper at T or T1 and disconnect Disconnect power at TR and TR1 T and T1 P or P1, if connected SINGLE ENTHALPY CHANGEOVER SET POINT (29) (32)
- Page 14 INSTALLER’S GUIDE Table 2. Temp vs. OHM Values for MAS (Mixed Air Sensor) Temp vs. OHM for MAS (Mixed Air Sensor) Temp F Temp C R(K OHMS) DC Volts 33.8 9.576 3.910 35.6 9.092 3.882 37.4 8.636 3.894 39.2 8.204 3.863 41.0 7.796...
- Page 15 INSTALLER’S GUIDE Checkout - For Units with a Honeywell W7212 Control W7212 CHECKOUT AND TROUBLESHOOTING Checkout requires a 9V battery, 620 ohm, 1.2K ohm, 5.6K ohm, and 6.8K ohm resistors. Use Table 4 and Fig. 18 for checkout. CAUTION Equipment Damage Hazard. Open Excessive force can damage potentiometer DC VOLTMETER...
- Page 16 INSTALLER’S GUIDE Table 3. Checkout for W7212, W7213, W7214 Economizer Connected to Honeywell Actuator (Cont.) Step Checkout Procedure Proper Response DIFFERENTIAL ENTHALPY Execute stop one, Checkout Preparation. Turn DCV MAX to mid position. Place 620 ohm resistor across S and + (white sleeve resistor makes OA enthalpy low).
- Page 17 INSTALLER’S GUIDE Troubleshooting - No Minimum Fresh Air Minimum Fresh Air Damper will not open Locate Minimum Check for 24 volts Is 24V present to Position across TR and Green "G" lead at 24 volts No voltage Potentiometer on TR1 terminals on Logic Module Logic Module.
- Page 18 INSTALLER’S GUIDE Troubleshooting - Unit Will Not Economize Dampers will not open beyond minimum position during 1 stage cooling. Jumper across the Ambient must be below 70F to activate Is OD ambient OAS terminals to Is OAS closed? economizer beyond minimum position fresh below 70F? close circuit air opening.
- Page 19 INSTALLER’S GUIDE Troubleshooting - 2nd Stage Inoperable Compressor will not energize when space conditions rise. Install a 2 stage thermostat and Is a 2-stage Is thermostat's Y2 Wire per Installer's wire according to economizer thermostat connected to unit's YL Guide. Installer's Guide applied? Troubleshoot why...
- Page 20 INSTALLER’S GUIDE Troubleshooting - Dampers Open With G Dampers drive to 100% open during a "Continuous Fan" call. (drives beyond minimum position setting) Ensure there is not a call for cooling. Rotate Minimum Position potentiometer fully Measure resistance of Adjust Minimum Does damper green resistor Position to desired...
- Page 21 INSTALLER’S GUIDE Troubleshooting - Mixed Air Sensor Dampers drive to 100% open although the mixed air temp is below 55F. It can be possible for the tip of the MAS to twist near the Remove MAS thermistor which causes the wires from "T"...
- Page 22 INSTALLER’S GUIDE Troubleshooting - Logic Module Failures Logic Module has repeated failures Remove MAS wires from "T" and "T1" terminals on logic module. Measure resistance from either MAS wire to cabinet ground Check other terminals for Replace MAS any continuity? shorting.
- Page 23 About Trane and American Standard Heating and Air Conditioning Trane and American Standard create comfortable, energy efficient indoor environments for residential applications. For more information, please visit www.trane.com or www.americanstandardair.com The manufacturer has a policy of continuous data improvement and it reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.
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