18-HD68D1-3

Installation Guide Other Installation Guides may be necessary, based on system configuration. A list of other system components is shown below.

1 Control (required) *ZONE950AC52ZA Relay Panel For use with 24V or communicating 2 indoor unit and 24V controlled outdoor unit

3 Zone Panel (optional) Relay Panel 4 Zone Sensor with Display (optional) 5 Zone Sensor (optional)

6 Zone Dampers (optional) BAY24VRPAC52DB * A or T

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.

These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.

Section 1. Safety

L! WARNING Table of Contents This information is intended for use by individuals possess- ing adequate backgrounds of electrical and mechanical Section 1. Safety ...... 1 experience. Any attempt to repair a central air conditioning product may result in personal injury and/or property dam- Section 2. General Information ...... 2 age. The manufacturer or seller cannot be responsible for Section 3. Installation ...... 3 the interpretation of this information, nor can it assume any Section 4. Terminal Locations & Identification.....6 liability in connection with its use. Section 5. Field Wiring Diagrams ...... 8 Section 6. LED Indicators ...... 11 L! WARNING Section 7. Troubleshooting ...... 12 LIVE ELECTRICAL COMPONENTS! During installation, testing, servicing, and troubleshoot- ing of this product, it may be necessary to work with live electrical components. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. 06/12 Section 2. General Information

2.1 Overview

The Relay Panel is a wall mounted low voltage panel that enables the communicating *ZONE950 control to operate with 24 VAC HVAC equipment. Only three wires are required from the control to the Relay Panel.

This Relay Panel controls the operation of heating, cooling, heat pump and dual fuel systems.

For specific wiring applications, see Field Wiring Diagrams. Relay Panel

*A or T

2.2 Contents in Box

The following parts are included in product model BAY24VRPAC52DB: NORM DUAL Dual Fuel Switch

0 SOV Y1 Stg1 Y2 Stg2 D R Data B Hot Thermostat and Indoor UnitCom W1 Stg1 W2 Stg2 1 - Relay Panel cover W3 Stg3 G Fan BK PWM System HVAC RS Remote Hum Indoor RS Hum

24 Vac Comm Sensors Aux1 Only Aux1 ODT

24 Vac Bit Master Aux2 Only Outdoor ODT 1 - Relay Panel base Aux2 24 Vac Only 4 - Mounting screws/anchors Relay Panel 4 - Wire ties

1 - Installation Guide Relay Panel

2.3 Optional Accessories

Sensor Description ZZSENSAL0400AA Indoor Temperature Sensor BAYSEN01ATEMPA Outdoor Temperature Sensor

2.4 Specifications

Specification Description Product Model: BAY24VRPAC52DB Product: Relay Panel for use with 24V indoor systems Size: 8.0” width x 9.3” height x 1.9” depth Storage Temperature: -40° to 175°F, 5% - 95% RH non-condensing Operating Temperature: -40° to 150°F, 5% - 95% RH non-condensing Input Power: 24 VAC from HVAC System (Range: 18-32 VAC) Power Consumption: 4VA* (See the following table for system transformer sizing guidelines.) Wire usage: Minimum 18 gauge NEC approved control wiring HVAC System Type Compatible: Standard (gas/electric), Heat Pump, Dual Fuel Multistage System Compatible: Standard HVAC Systems: 3-stage heating, 2-stage cooling Heat Pump Systems: 5-stage heating (2-compressor, 3 aux heat), 2-stage cooling LEDs: 11 green, 1 amber Communications: 12 VDC AUX Contacts: 18–30 VAC, 2A max 2 18-HD68D1-3 2.5 System Transformer Sizing Guidelines

Indoor Unit Type Comm Comm 24V 24V Furnace Air Handler Furnace Air Handler Minimum Indoor 24V Control Power OD Unit Type Transformer Size, VA* Communicating Heat Pump 35 35 See Below Communicating Air Conditioner 35 35 24Volt-Controlled Single Stage Heat Pump 35 40 35 40 24Volt-Controlled Single Stage Air Conditioner 35 40 35 40 24Volt-Controlled 2-Stage Single Compressor Heat Pump 65 75 65 75 24Volt-Controlled 2-Stage Single Compressor Air Conditioner 50 40 50 40 24Volt-Controlled 2-Stage Dual Compressor Heat Pump 50 75 50 75 24Volt-Controlled 2-Stage Dual Compressor Air Conditioner 35 40 35 40

*Note: The VA rating of all 24V field-installed accessories must be added to the above for sizing indoor unit control transformers or the accessories must be powered separately.

Section 3. Installation

Unit Location Considerations

The unit’s rugged design allows installation in closet, attic or other non-condensing locations free from obstruc- tions or other hazards.

1 Remove Cover

Remove cover by grasping at edges and gently NORM DUAL Dual Fuel Switch

pulling the cover straight towards you. It should 0 SOV Y1 Stg1 Y2 Stg2 D R Data B Hot Thermostat Com and Indoor Unit release without much effort. W1 Stg1 W2 Stg2 W3 Stg3

G Fan BK PWM System HVAC RS Remote Hum Indoor RS Hum

24 Vac Comm Sensors Aux1 Only Aux1 ODT

24 Vac Bitmaster Aux2 Only Outdoor ODT Aux2

24 Vac Only

Relay Panel

Relay Panel

2 Mark Mounting Location

NORM DUAL

Dual Fuel Mark four holes on the wall using the base as a Switch

D R B 0 SOV Y1 Stg1 Data template. A level may be used to ensure accuracy. Hot Com Y2 Stg2 Thermostat and Indoor Unit

W1 Stg1 RS

Indoor W2 Stg2 Remote RS W3 Stg3

Sensors HVAC System HVAC ODT G Fan ODT Comm Outdoor BK PWM Hum Bit Master

Hum 24 Vac Only Aux1

Aux1 24 Vac Only Aux2 Aux2 24 Vac Only

Relay Panel

18-HD68D1-3 3 NORM DUAL

Dual Fuel Switch

D R B 0 SOV Y1 Stg1 Data Hot Com Y2 Stg2 Thermostat 3 Mount Panel W1 Stg1 RS

Indoor W2 Stg2 Remote RS W3 Stg3

Sensors HVAC System HVAC ODT G Fan ODT Comm Outdoor BK PWM Hum Bitmaster

Hum 24 Vac Only Aux1

Aux1 24 Vac 1/8” for screws Only DRILL HOLES Aux2 Aux2 24 Vac into studs Only Relay Panel

3/16” for drywall anchors

Mounting to studs: Drill 1/8” pilot holes in the four Attach base to wall using four screws provided. Do locations marked above. not overtighten.

Mounting to drywall: If mounting to drywall with no studs behind it, en- large pilot holes to 3/16” for anchors (included with the relay panel).

Gently tap anchors into the holes.

4 General Wiring Information

L! WARNING L! CAUTION LIVE ELECTRICAL COMPONENTS! CAUTION: EQUIPMENT DAMAGE HAZARD - Improper During installation, testing, servicing, and troubleshoot- wiring can lead to equipment damage. Follow the terminal ing of this product, it may be necessary to work with live connection information carefully to ensure the control is electrical components. Failure to follow all electrical safety wired properly. After wires are secure, bare wires precautions when exposed to live electrical components MUST NOT touch each other. See the Field Wiring Dia- could result in death or serious injury. grams for specific system applications.

Wires may enter the Relay Panel through openings on each corner and at the center of each side. Wires may Necessary wire lengths should be considered when enter at determining entry points. any of 8 locations

Relay Panel

4 18-HD68D1-3 5 Routing Wires

Run wires within the recessed wire “raceway”. Be sure there is ample length to reach the connectors.

NORM DUAL

Dual Fuel Switch

DRB

0 SOV Data Hot Com Y1 Stg1 Thermostat Y2 Stg2 Route wires into “Raceways” RS

Indoor RS Remote W1 Stg1 W2 Stg2

W3 Stg3 Sensors ODT

HVAC System HVAC ODT Outdoor Bit Master 6 Attaching Wires G Fan BK PWM

c Comm Hum

Hum 24 Va Only

Using 1/8” blade screwdriver, attach all wires se- c Fault Aux1

curely to the proper terminals on the Relay Panel. Aux1 24 Va Only B Aux2 c DR

Aux2 24 Va Only Refer to the following section for detailed terminal Hot Data s information. Thermoo Relay Panel 0 SOV and Indo Y1 Stg1 (See the Field Wiring Diagrams section for com- Y2 Stg2 mon system configurations.)

W1 Stg1 W2 Stg2 System HVAC Co W3 Stg3

Bitm Fan G M K PW

7 Securing Wires

Secure all wires with the supplied wire ties to en- sure that wires are kept in place and not strained. Secure wires with Wire Ties

NORM DUAL

Dual Fuel Switch

DRB

0 SOV Data Hot Com 18-HD68D1-3 Y1 Stg1 Thermostat 5 Y2 Stg2

RS

Indoor RS Remote W1 Stg1 W2 Stg2

W3 Stg3 Sensors ODT

HVAC System HVAC ODT Outdoor Bit Master G Fan BK PWM

c Comm Hum

Hum 24 Va Only

c Fault Aux1

Aux1 24 Va Only

Aux2 c

Aux2 24 Va Only

Relay Panel Section 4. Terminal Locations and Identification

Refer to the following diagrams for descriptions of each terminal.

Terminal KEY Identification A Dual Fuel Switch A Thermostat + B NORM DUAL 24VAC Input Dual Fuel Switch C Optional Sensors B D R B

D HVAC System 0 SOV Data Hot Com Y1 Stg1 Thermostat Y2 Stg2 and Indoor Unit

RS

D Indoor RS Remote W1 Stg1 W2 Stg2 C W3 Stg3 Sensors ODT

HVAC System HVAC ODT Outdoor Comm G Fan BK PWM

c Bit Master Hum

Hum 24 Va Only

Aux1 c

Aux1 24 Va Only

Aux2 c

Aux2 24 Va Only

Relay Panel

A Dual Fuel Switch

Switch Position Description For HP or conventional A NORM Heat/Cool systems. NORM DUAL DUAL For dual fuel systems. Dual Fuel Switch This switch ships in the NORM position by default. Refer to the following section for com- D RpleteB Field Wiring Diagrams.

0 SOV Data Hot Com Y1 Stg1 Thermostat 6 Y2 Stg2 and Indoor Unit 18-HD68D1-3

RS

Indoor RS Remote W1 Stg1 W2 Stg2

W3 Stg3 Sensors ODT

HVAC System HVAC ODT Outdoor Comm G Fan BK PWM

c Bit Master Hum

Hum 24 Va Only

Aux1 c

Aux1 24 Va Only

Aux2 c

Aux2 24 Va Only

Relay Panel For convenience, you may record the color of each wire used in the blanks provided.

B Thermostat and Indoor Unit Connections NORM DUAL Terminal Name Description Color Used: Dual Fuel Switch D - Data Data B R - Hot 24 V hot D R B B - Com 24 V common NORM DUAL 0 SOV Data Hot Com Note: R & B must receive 24 volts from the indoor unit transformer. Dual Fuel Y1 Stg1 Switch Thermostat Y2 Stg2 and Indoor Unit D R B RS

0 SOV Data Indoor RS Hot Com Remote C Optional Remote Sensor Connections Y1 Stg1 ThermostatW1 Stg1 Y2 Stg2 and IndoorW2 Unit Stg2 Terminal Name Description Color Used: W3 Stg3 Sensors ODT RS Remote Indoor

HVAC System HVAC RS ODT temp sensor Outdoor Indoor Remote RS ZZSENSAL0400AA Indoor RS Comm G Fan Remote W1 Stg1 BK PWM ODT 1 Outdoor temp sensor W2 Stg2 c Bit Master C Hum BAYSEN01ATEMPA Outdoor W3 Stg3 Sensors ODT ODT Hum 24 Va Only

HVAC System HVAC ODT c Aux1 Outdoor Note: The Relay Panel uses 5 VDC to obtain temperature feedback from Comm remote sensors. Do not run these sensors in a wiring bundle that contains G Fan Aux1 24 Va Only 24 volts AC. See remote sensor literature for troubleshooting. BK PWM Aux2 c 1 Wired outdoor temperature sensor must be enabled at the 950 Control. c Bit Master

Hum Aux2 24 Va Only NORM DUAL

Hum 24 Va Only Dual Fuel Aux1 c Switch D

24 Va Only HVAC System Connections Aux1 Relay Panel Aux2 c D R B Terminal Name Description Color Used:

Aux2 24 Va Only O - SOV Switch Over Valve 0 SOV Data Hot Com Y1 - Stg1 First Stage Compressor Y1 Stg1 Thermostat Y2 Stg2 Second Stage and Indoor Unit Y2 - Stg2 Relay Panel Compressor W1 - Stg1RS First Stage ID Heating

Indoor RS D W2 - Stg2Remote Second Stage ID Heating W1 Stg1 W3 - Stg3 Third Stage ID Heating W2 Stg2

W3 Stg3 G - FanSensors ODT Indoor Blower

HVAC System HVAC ODTPWM Signal for indoor BK - PWM Outdoor Comm blower modulation G Fan Hum* Humidifier Contact BK PWM

c Bit Master Hum Hum* Humidifier Contact

Hum 24 Va Only Aux 1* Dehumidifier/Ventilation --- c Aux1 Aux 1* Dehumidifier/Ventilation ---

Aux1 24 Va Only LEDs Aux 2* Dehumidifier/Ventilation --- Aux2 c

Aux2 24 Va Only Aux 2* Dehumidifier/Ventilation --- *Note: Hum & Aux terminals are dry contacts only. Input voltage will need to be supplied. Refer to humidifier’s installer’s guide. AUX 1 and AUX 2 contact con- Relay Paneltrol requires a 950 control with software version 2.1 or later

18-HD68D1-3 7 Section 5. Field Wiring Diagrams DUAL FUEL

DUAL FUEL VARIABLE SPEED GAS FURNACE DUAL FUEL NON-VARIABLE SPEED GAS FURNACE

TWO STAGE VARIABLE SPEED RELAY RELAY THERMOSTAT THERMOSTAT GAS FURNACE ONE OR TWO STAGE PANEL PANEL HEAT PUMP Y/ Y2 NON-V.S. ONE COOL/HEAT Y2 Y2 -2nd STAGE Y2 OR TWO STAGE SINGLE STAGE HEAT PUMP W3 GAS FURNACE W3 24VAC HOT R 24VAC HOT R R R R R R R HEATING - W2 HEATING - W2 3rd STAGE W2 4th STAGE W2 HEATING - W/ W1 X2 HEATING - W1 W1 X2 2nd STAGE W1 3rd STAGE COOL/HEAT - Y1 Y Y COOL/HEAT - Y1 Y1/ Y1 1st STAGE 1st STAGE YLO

FAN G G FAN G G

SOV O SOV O O O O 24VAC common 24VAC common B B B B B B B C B C BK VS MODE -fan BK BK DATA DATA D D D D REMOTE RS I D REMOTE RS INDOOR I D RS SENSOR INDOOR SENSOR SENSOR SENSOR RS ODT ODT OUTDOOR O D OUTDOOR O D SENSOR ODT SENSOR SENSOR ODT SENSOR

Note: Enable "BK" (turn on dehumidifier switch or cut “BK” jumper). Note: Dual fuel switch on Relay Panel must be set to DUAL. Note: Dual fuel switch on Relay Panel must be set to DUAL. Note: Blower delay profiles must be turned off. See indoor unit service facts for details.

DUAL FUEL WITH VARIABLE SPEED OIL FURNACE DUAL FUEL WITH NON-VARIABLE SPEED OIL FURNACE

VARIABLE SPEED RELAY ONE OR TWO THERMOSTAT OIL FURNACE RELAY PANEL STAGE HEAT PUMP THERMOSTAT PANEL

COOL/HEAT Y2 Y Y2 Y2 NON-VARIABLE 2nd STAGE SPEED SINGLE STAGE W3 W3 OIL FURNACE HEAT PUMP 24VAC HOT R R R R R 24VAC HOT R R R HEATING - W2 HEATING - 4th STAGE 3rd STAGE W2 BT R1 HEATING - HEATING - BT R1 W1 W1 X2 W/ X2 3rd STAGE 2nd STAGE W1 W1 COOL/HEAT - Y1 COOL/HEAT - Y1 YLO Y1 Y Y 1st STAGE 1st STAGE G G FAN FAN G G

SOV O O O SOV O O

24VAC common B B B C B 24VAC common B B B B C VS MODE -fan BK BK BK DATA DATA D D D D OIL BURNER PRIMARY OIL BURNER PRIMARY REMOTE RS I D REMOTE RS INDOOR T I D RS SENSOR INDOOR SENSOR T SENSOR SENSOR RS R1 R1 OUTDOOR ODT O D ODT T OUTDOOR O D T SENSOR ODT SENSOR SENSOR ODT SENSOR

Note: Remove the "R" to "BK" jumper at the low voltage control board. Note: Cut the factory installed "R" to "O" jumper at the LVTB. Note: Dual fuel switch on Relay Panel must be set to DUAL. Note: Blower delay profiles must be turned off. See indoor unit Note: BT (Bonnet Thermostat) model THT1248 (BAYSEN03ATEMPAA) service facts for details. required for dual fuel, oil furnace applications. Note: Dual fuel switch on Relay Panel must be set to DUAL. Note: BT (Bonnet Thermostat) model THT1248 (BAYSEN03ATEMPAA) required for dual fuel, oil furnace applications.

8 18-HD68D1-3 HEAT PUMP

HEAT PUMP WITH VARIABLE SPEED INDOOR HEAT PUMP WITH NON-VARIABLE SPEED INDOOR Non-Communicating Air Handler

TWE & 2/4TEE3F RELAY VARIABLE SPEED ONE OR TWO STAGE RELAY SINGLE STAGE THERMOSTAT THERMOSTAT AIR HANDLER PANEL AIR HANDLER HEAT PUMP PANEL HEAT PUMP Y/ COOL/HEAT - Y2 Y2 COOL/HEAT - 2nd STAGE Y2 2nd STAGE Y2

HEATING - W3 W3 HEATING - W3 W3 5th STAGE 5th STAGE R 24VAC HOT R R R R 24VAC HOT R R R

HEATING - W2 W2 HEATING - W2 W2 4th STAGE 4th STAGE HEATING - W1 HEATING - 3rd STAGE W1 3rd STAGE W1 W1 X2 COOL/HEAT - Y1 Y1/ Y1 COOL/HEAT - Y 1st STAGE YLO 1st STAGE Y1 Y

X2 FAN G G FAN G G

SOV O O O SOV O O O

B 24VAC common B B B B 24VAC common B B B

VS MODE -fan BK BK DATA DATA D D D D

REMOTE RS I D REMOTE RS INDOOR I D RS SENSOR INDOOR SENSOR SENSOR SENSOR RS ODT OUTDOOR O D OUTDOOR ODT O D SENSOR ODT SENSOR SENSOR ODT SENSOR

Note: Remove the “R” to “BK” jumper at the low voltage control board. Note: DIP Switches 5 & 6 must be set to OFF on indoor unit.

HEAT PUMP WITH 2/4TEE3C HEAT PUMP WITH *AM7 Air Handlers Communicating Air Handler in 24 Volt Mode

RELAY THERMOSTAT AIR HANDLER ONE OR TWO STAGE RELAY ONE OR TWO STAGE PANEL HEAT PUMP THERMOSTAT AIR HANDLER PANEL HEAT PUMP COOL/HEAT - Y2 Y2 2nd STAGE Y2 COOL/HEAT - Y2 Y2 2nd STAGE Y2 HEATING - W3 W3 5th STAGE HEATING - W3 W3 5th STAGE R 24VAC HOT R R R R 24VAC HOT R R R HEATING - W2 W2 4th STAGE HEATING - W2 W2 4th STAGE HEATING - 3rd STAGE W1 W1 HEATING - W1 W1 3rd STAGE COOL/HEAT - 1st STAGE Y1 Y1 COOL/HEAT - 1st STAGE Y1 Y1 Y Yo Y X2 FAN G G X2 FAN G G O SOV O O SOV O O O

24VAC common B B B B B 24VAC common B B B VS MODE -fan BK BK VS MODE -fan BK BK DATA DATA D D D D

REMOTE RS I D REMOTE RS INDOOR I D RS SENSOR INDOOR SENSOR SENSOR SENSOR RS ODT OUTDOOR O D OUTDOOR ODT O D SENSOR ODT SENSOR SENSOR ODT SENSOR

Note: Remove the “R” to “BK” jumper at the low voltage control board. Note: Cut the factory installed "BK" jumper at the indoor unit.

18-HD68D1-3 9 HEAT/COOL

COOLING WITH VARIABLE SPEED INDOOR COOLING WITH NON-VARIABLE SPEED INDOOR

TWO STAGE VS GAS FURNACE or RELAY VS AIR HANDLER ONE OR TWO STAGE RELAY ONE OR TWO STAGE THERMOSTAT PANEL & ELECTRIC HEAT AIR CONDITIONER THERMOSTAT PANEL GAS FURNACE or AIR HANDLER & Y/ ELECTRIC HEAT COOLING-2nd Y2 Y2 Y2 Y2

HEATING -3rd W3 W3 HEATING -3rd W3 W3

R 24VAC HOT R R R* R 24VAC HOT R R

HEATING -2nd W2 W2 HEATING -2nd W2 W2 SINGLE STAGE AIR CONDITIONER W1 W1 W/ HEATING -1st HEATING -1st W1 W1

Y1 Y1/ Y/ COOLING -1st YLO Y1 COOLING -1st Y1 Y Y

FAN G G FAN G G

O O O

24VAC common B B B B 24VAC common B B B C B C VS MODE -fan BK BK BK

DATA DATA D D D D

REMOTE RS I D REMOTE RS INDOOR I D RS SENSOR INDOOR SENSOR SENSOR SENSOR RS ODT OUTDOOR O D OUTDOOR ODT O D SENSOR ODT SENSOR SENSOR ODT SENSOR

Note: Enable "BK" (turn on dehumidifier switch or cut “BK” jumper). Note: *R is only connected on two-compressor models

COOLING WITH 2/4TEE3C COOLING WITH *AM7 AIR HANDLERS Communicating Air Handler in 24 Volt Mode

RELAY ONE OR TWO STAGE RELAY ONE OR TWO STAGE THERMOSTAT AIR HANDLER THERMOSTAT AIR HANDLER PANEL AIR CONDITIONER PANEL AIR CONDITIONER

COOLING-2nd Y2 Y2 Y2 COOL/HEAT - Y2 Y2 2nd STAGE Y2 HEATING -3rd W3 W3 HEATING - W3 W3 5th STAGE R 24VAC HOT R R R* R 24VAC HOT R R R* HEATING -2nd W2 W2 HEATING - W2 W2 4th STAGE HEATING - HEATING -1st W1 W1 3rd STAGE W1 W1 COOL/HEAT - COOLING -1st Y1 Y1 1st STAGE Y1 Y1 Y Yo Y FAN G G FAN G G SOV O O O O B 24VAC common B B B 24VAC common B B B B VS MODE -fan BK BK DATA VS MODE -fan BK BK D D D DATA D REMOTE RS I D INDOOR SENSOR REMOTE SENSOR RS RS I D INDOOR SENSOR SENSOR RS OUTDOOR ODT O D SENSOR ODT SENSOR OUTDOOR ODT O D SENSOR ODT SENSOR

Note: First stage blower air flow is set on air handler interface control board. Note: Remove the factory installed "BK" jumper at the indoor unit. Note: Remove the “R” to “BK” jumper at the low voltage control. Note: *R is only connected on two-compressor models Note: *R is only connected on two-compressor models

10 18-HD68D1-3 HEAT/COOL

COOLING WITH VARIABLE SPEED OIL FURNACE COOLING WITH NON-VARIABLE SPEED OIL FURNACE

VARIABLE SPEED ONE OR TWO STAGE RELAY AIR CONDITIONER RELAY THERMOSTAT OIL FURNACE THERMOSTAT PANEL PANEL SINGLE STAGE OIL FURNACE COOL/HEAT Y2 Y Y2 Y2 2nd STAGE W3 W3

R 24VAC HOT R R R* R 24VAC HOT R R HEATING - SINGLE STAGE W2 W2 4th STAGE AIR CONDITIONER R1 HEATING - R1 W1 HEATING W1 W 3rd STAGE W1 COOL/HEAT - Y1 YLO Y1 COOLING Y1 Y Y 1st STAGE

FAN G G FAN G G

SOV O O O

24VAC common B B 24VAC common B B B B B C B C

VS MODE -fan BK BK BK DATA DATA D D D D OIL BURNER PRIMARY OIL BURNER PRIMARY REMOTE RS REMOTE RS I D I D T INDOOR INDOOR RS SENSOR T RS SENSOR SENSOR SENSOR R1 R1 ODT OUTDOOR ODT O D OUTDOOR O D T SENSOR ODT SENSOR T SENSOR ODT SENSOR

Note: Remove the "R" to "BK" jumper at the low voltage control board. Note: Cut the factory installed "R" to "O" jumper at the LVTB. Note: Blower delay profiles must be turned off. See indoor unit service facts for details. Note: *R is only connected on two-compressor models

COMMUNICATING FURNACE WITH 24V OUTDOOR 24V FROM RELAY PANEL

THERMOSTAT RELAY COMMUNICATING ONE OR TWO STAGE PANEL FURNACE HEAT PUMP

COOL/HEAT Y/ -2nd STAGE Y2 Y2 Y2

W3 24VAC HOT R R R R

HEATING - W2 4th STAGE W2

HEATING - W1 W1 X2 3rd STAGE COOL/HEAT - Y1 Y1/ Y1 1st STAGE YLO

FAN G G

SOV O O O

24VAC common B B B C B

VS MODE -fan BK BK DATA D D D

REMOTE RS I D INDOOR SENSOR SENSOR RS OUTDOOR ODT O D SENSOR ODT SENSOR

Note: Enable "BK" (turn on dehumidifier switch or cut “BK” jumper). Note: Dual fuel switch on Relay Panel must be set to DUAL. Note: Blower delay profiles must be turned off. See indoor unit service facts for details.

18-HD68D1-3 11 NORM DUAL

Section 6. LED Indicators Dual Fuel Switch Comm Communication LED – Amber D R B • LED on when first powering up • LED flashes number of communicating com- 0 SOV Data Hot Com ponents in the system. Y1 Stg1 Thermostat • (ex. communicating control with relay panel Y2 Stg2 and Indoor Unit will equal two flashes) RS

Bit Master Indoor RS Remote Bitmaster/Clock Signal LED – Green W1 Stg1 • LED on when Clock is working W2 Stg2

W3 Stg3 Sensors ODT HVAC System HVAC System HVAC ODT HVAC System LEDs – Green Outdoor Comm • A Green LED will illuminate when the relay is G Fan energized. BK PWM

c Bit Master Hum

Hum 24 Va Only

Aux1 c

Aux1 24 Va Only

Aux2 c

Aux2 24 Va Only

Relay Panel Section 7. Troubleshooting

Troubleshooting Symptom Possible Cause Action Loss of 24VAC between power (R) and common (B) Check for proper incoming 24VAC power COMM LED is not Check for open or shorts in field wiring flashing the ap- One or more communicating devices is not com- propriate number municating • ~12VDC between D & B = Proper communication Evaluate other communicating devices and use of devices • ~16VDC between D & B = Loss of communication the service facts of that device if not communi- • Less than ~12VDC between D & B = shorted or no power cating properly Loss of 24VAC between power (R) and common (B) Check for proper incoming 24VAC power Bit Master LED is Loss of communication Check for shorted wire between data (D) and off or fluttering • 0VDC between D & B (shorted or no power) • Less than ~12VDC between D & B (low level short) common (B) wires Check the System Report screen at the control Control is not calling HVAC System to verify demand LED is not illumi- Verify 24VAC between relay output terminal and nating when Relay common (B) Panel is calling for Relay Panel failed a particular relay **Relay output contains snubber circuits; always check with a load applied

6200 Troup Highway The manufacturer has a policy of continuous product and product data improvement Tyler, TX 75707 and it reserves the right to change design and specifications without notice. © 2011 Trane Representative-only illustrations included in this document.

12 18-HD68D1-3