Icomfort® Equipment Interface Module Installation and Setup Guide (10T50)

iComfort® Equipment Interface Module Installation and Setup Guide (10T50)

507240-03 1/2018 Supersedes 6/2017 TABLE OF CONTENTS Shipping and Packing List Shipping and Packing List...... 2 Quantity Description Application and Requirements...... 2 1 iComfort® Equipment Interface Module. Indoor Transformer Requirements...... 2 1 Installation and setup guide Equipment...... 2 1 Warranty certificate Installation...... 5 Configuration Setup...... 5 EIM, 24VAC Furnace and iComfort Heat Pump...... 5 WARNING Improper installation, adjustment, alteration, service or maintenance can EIM, iComfort Furnace and 24VAC Heat Pump...... 5 cause property damage, personal injury or loss of life. Unit Type Jumpers...... 6 Installation and service must be performed by a licensed professional HVAC installer (or equivalent) or a service agency. Heat Stage Jumper Positions...... 6 Air Temperature Sensor Connections...... 6 Application and Requirements iComfort Terminal Connections...... 6 Indoor Transformer Requirements Heat Stage Jumpers...... 7 Dual-Fuel Terminal Connections...... 7 The following tTable 1 lists the required indoor unit transformer rating (VA) for specific configurations. Conventional Terminal Connections...... 8 LED Indicators...... 8 Table 1. System VA Loading Chart Minimum Transformer Rating Configuration Soft Disable...... 8 (VA) iComfort Wi-Fi Commissioning (Conventional Outdoor Unit)...... 9 2-Stage HP, 3-Stage Electric heat 70 iComfort S30 Commissioning (Conventional Outdoor Unit)...... 9 2-Stage HP, 2-Stage Furnace (with tempering) 70 2-Stage HP, 2-Stage Furnace (without tempering) 50 Operating Environment Specifications...... 9 2-Stage AC, 2-Stage Furnace 40 Unit Dimensions...... 10 Duel-Fuel Operations...... 10 Equipment Field Wiring...... 11 The Equipment Interface Module (EIM) is used with an iComfort series thermostat (iComfort Wi-FI® or iComfort® S30) using the R, i+, i-, and C Alert Codes and Troubleshooting...... 17 terminals. The EIM is the interface between conventional (non-iComfort) HVAC equipment and iComfort HVAC equipment. The control supports the WARNING following equipment applications: This product contains a chemical known to the State of California to NOTE: EIM will support single-stage outdoor units with single-stage or cause cancer, birth defects, or other reproductive harm. variable-stage indoor furnaces.

2 HEAT STAGES HEAT PUMP CAPACITY JUMPER TERMIINALS UNIT TYPE JUMPER JUMPER TERMINALS STATUS LED TERMINALS COMMUNICATION INDICATOR LED

OUTDOOR AIR SENSOR CONNECTIONS ICOMFORT® DISCHARGE AIR CONNECTIONS SENSOR CONNECTIONS DUAL-FUEL CONNECTIONS

3 AMP FUSE

NON-COMMUNICATING TERMINALS

Figure 1. Terminals and LEDs

3 EIM with Air Hander or Furnace (Indoor Unit) and either a Air Conditioner or Heat Pump (Outdoor Unit)

tions, additional components may need to be added, see figure ICOMFORT 5 on page 8. WI-FI

ICOMFORT S30

iComfort Series Equipment Interface 24VAC Air Handler or Thermostat Model (EIM) Furnace (Indoor Unit)

Wiring Legend 4−wire communicating iComfort-enabled 24VAC Air 24VAC conventional Air Conditioner or Conditioner Heat Pump or Heat Pump (Outdoor Unit) (Outdoor Unit)

Figure 2. System View

4 Installation NOTE: When the Equipment Interface Module is replaced, recommissioning the iComfort series thermostat will also need to be re-accomplished. See the iComfort series thermostat Setup WARNING Guide for recommissioning procedure. Controls in this module are sensitive to moisture. Do NOT secure this EIM, 24VAC Furnace and iComfort Heat Pump module to the sheet metal cabinet where moisture may condense during periods of high humidity. Secure the module to a nearby wooden stud, if 1. Set the EIM Unit Type Jumper to IFC. possible. 2. Set the EIM Heat Stage Jumper to the applicable number of furnace heat stages. 3. Use the iComfort series thermostat to complete the commissioning IMPORTANT procedure. The iComfort series thermostat paired with the Equipment Interface Module (EIM) will work with most 24VAC furnaces, air handlers, air EIM, iComfort Furnace and 24VAC Heat Pump conditioners and heat pumps (up to 2-stages of cooling and 3-stages of heat). 1. Set the EIM Unit Type Jumper to Heat Pump. The iComfort series thermostat without the Equipment Interface Module 2. Set the EIM Heat Stage Jumper to the applicable number of heat pump (EIM) will work with Lennox branded communicating HVAC equipment. heating stages. 1. Remove the module cover. 3. Wire according to figure 10. 2. Mount the Equipment Interface Module (EIM) near the indoor unit. 4. Use the iComfort series thermostat to complete the commissioning procedure. 3. Use the wiring diagrams reference in Table 10 on page 11 to complete the wiring connections for the specific application and configuration. NOTE: For two-stage heat pump go to the heat pump outdoor control, locate J2 - 2ND STAGE LOCKIN and disable this function by removing the installed jumper and relocating it to one pin only. CAUTION Electrostatic discharge can affect electronic components. Take precautions during unit installation and service to protect the unit’s electronic controls. Precautions will help to avoid control exposure to electrostatic discharge by putting the unit, the control and the technician at the same electrostatic potential. Neutralize electrostatic charge by touching hand and all tools on an unpainted unit surface before performing any service procedure

Configuration Setup

How the EIM is configured is determined by the system components. NOTE: Changing jumper positions after the control has been powered-up requires recommissioning for the change to be recognized.

5 Unit Type Jumpers 24VAC Heat Pump Size Setting Set the unit type jumper for the type of indoor unit being used (see figure Heat pump size must be configured when using a non-communicating heat 2 and table 4). The factory default setting is IFC. If jumper is missing from pump using the Heat Pump Size jumper (see figure 4 and table 5). Factory header, alarm 130 is activated. default setting is for 3.0 (3-ton). If jumper is missing from header, alarm 130 is activated. Table 2. Unit Type Jumpers Positions 5 5 Jumper 5 0 0 0 0 2. 3. Position Indoor Unit Outdoor Unit 1. 2. 3. 4. 5. HP iComfort Furnace Conventional Heat Pump

IFC Conventional Furnace Conventional Heat Pump or air AHC Conventional Air Handler conditioner

HP IFC AHC

Figure 5. Conventional Heap Pump Capacity Jumper Setting

Air Temperature Sensor Connections Figure 3. Unit Type Jumper Positions Refer to “Figure 1. Terminals and LEDs” on page 3 for various terminal Table 3. Unit Type Jumpers Positions locations. Label Function / Description Table 4. Unit Type Jumpers Positions HP Equipment Interface Module—Heat Pump Label Function / Description IFC Equipment Interface Module—Furnace (factory default) Show ambient temperatures (optional if weather feed is acceptable or AHC Equipment Interface Module—Air Handler outdoor unit is a communicating unit; use X2658 Outdoor Sensor - 2 terminals). Outdoor Air Heat Stage Jumper Positions Sensor NOTE: Wiring distance between the EIM and the outdoor temperature sensor can not exceed 150 feet (45 meters) when wired with The heating staging Jumper must be set for the number of stages of electric minimum 22AWG (Recommend) 18AWG dedicated two- heat (air handler) or the number of stage of gas heat (furnace) and stages conductor thermostat cable. of heat pump. Using the heat stages jumper (see figure 3 and table 8). Discharge Air Optional for diagnostics of indoor air; use 88K38 Discharge Air Sensor - 2 Sensor terminals. The factory default setting is position 2. If jumper is missing from header, alarm 130 is activated. iComfort Terminal Connections

0 1 2 3 Table 5. Unit Type Jumpers Positions Label Function / Description R 24VAC communication power Input Figure 4. Heat Stage Jumper Positions i+ Communication high – data line i- Communication low – data line C 24VAC communication common power Input

6 Heat Stage Jumpers Dual-Fuel Terminal Connections Use the following table to set the heat stage jumpers. Table 7. Dual-Fuel Terminals

Table 6. Heat Stage Jumpers Label Description Function Air Handler Heat The pre-coil discharge air sensor should Furnace Heat Stages Heat Pump Stages be installed downstream of the gas heat Stages exchanger and before the in door coil when Compressors Electric Heat Gas Stages Percentage Percentage Percentage a heat pump is used and defrost tempering Number of Number of Number of

Stages Stages is required.

Label Stage Stage Stage (Position) DFTS Pre-coil discharge air tem- It must be placed in free airflow, where perature (2 terminals) other accessories (such as humidifiers, UV lights, etc.) will not interfere with its ac- curacy. Wiring distance between the EIM and the discharge air sensor should not exceed 10 feet when using 18AWG ther- No Electric 0 0 1 100% 1 100% mostat wire. Heat This input is used in systems with non-com- 1 1 100% 1 100% 1 100% municating heat pumps for defrost indica- W1-DEF Defrost signal input tion. The input provides a nominal load of 2 50%, 70%. 70%. 2 2 3 50 mA, 24 VAC. (default) 100% 100% 100% In systems with communicating IFC, 33.5%, 70%, 70%. the EIM (HP) O output is connected to a 3 3 66.5%, 2 3 100% 100% non-communicating heat pump compatible 100% 0 Heat Pump Reversing Valve with O signal for reversing valve operation. (Powered for cooling) A 24VAC signal is generated on O for cool- NOTE: If jumper is missing, setting defaults to single stage. Changing jumper position ing operation, while the terminal is open for after power-up requires recommission for the change to be recognized. heating operation. In systems with communicating IFC, the EIM (HP) B output is connected to a Heat Pump Reserving non-communicating heat pump compatible B Valve with B signal for reversing valve operation. (Powered for heating) A 24VAC signal is generated on B for heat pump operation, while the terminal is open for cooling operation.

7 Conventional Terminal Connections Table 9. Status LED (Green)

Table 8. Conventional Terminals Green LED Function / Description Label Description Function Remains steady ON until the device sends its start-up mes- Steady On sage. 1st - stage heat output (1st stage gas heat output when configured as IFC W1 and 1st stage electric heat output when configured as AHC. Blinks 3 second OFF and 1 second ON Soft disable state 2nd - stage heat output (2nd stage gas heat output when configured as IFC W2 and 2nd stage electric heat output when configured as AHC. Blinks 2 second ON and 2 Service is being provided (W, Y or G relay is second OFF ON, or G input ON 3rd - stage heat output (3nd stage electric heat output when configured as W3 AHC) Blinks 1 second ON and 1 second OFF Alarm is present. Indoor blower control (continuous fan) (monitoring only). G input may be G connected to IAQ devices such as LVCS, HRV or ERV to turn the indoor blower on and off. Soft Disable Y2 2nd - stage compressor output Soft disabling is when the iComfort® thermostat finds an unknown control Y1 1st - stage compressor output such as a indoor or outdoor unit control, iHarmony® zoning system or 24VAC dehumidification signal output. The DS terminal is powered when Equipment Interface Module (EIM) on the system communication bus. The DS there is not a dehumidification call. thermostat sends the unknown control a message to go into soft disable mode until component is properly configured. Class II, 24VAC transformer R and C terminals are used to receive C power from the indoor unit and capable common ® of providing the power to the EIM and all The iComfort thermostat will not show any code for a soft disabled control. the associated loads. The R power in- When soft disabling occurs only the control that has been disabled will R Class II. 24VAC transformer put uses a 3A fuse (Lennox part number power 25J4901. display the blinking LED status. In this case, the control blinks three seconds OFF and one second ON. H 24VAC humidifier signal output Used as reversing valve output for heat Use the following procedure if the equipment interface module is displaying Heat pump reversing valve pumps. The EIM uses a single-pole dual the soft disable code. O (24VAC = cool) throw relay to generate O and B signals. Normally the O output is open and B out- Confirm proper wiring between all devices such as thermostat, EIM, put at 24VAC during heating calls. During 1. cooling calls O is 24VAC and B open. With indoor and outdoor unit). relay de-energized 24VAC is present on O Heat pump reversing valve terminal. 2. Cycle power to the control that is displaying the soft disable code. B (24 VAC = heat) When power off/ or control reset, 24VAC power shall not be present on the O ter- 3. Touch the Lennox icon on the thermostat home screen and hold until minal. the installer warning screen appears.

LED Indicators 4. Touch yes to continue. This control has two green LED to indicate status and communication 5. Touch Setup and then confirm to continue. activity One LED is labeled Status and the other is labeled RSBUS. 6. Use this Thermostat? Touch press here to continue. RSBUS LED 7. Touch the next button to continue past the next three screens. The RSBus LED flashes when information is being communicated over the RSBus. 8. From the System Devices list, touch reset ALL to reset all devices. Status LED 9. Touch the confirm button. The following table lists all status LED information. The thermostat will reboot and start through the setup process again. 8 IMPORTANT If any jumpers were set incorrectly AFTER commissioning was completed, then reposition jumpers to correct positions. Re-running the commissioning procedure will be required at the iComfort series thermostat. iComfort Wi-Fi Commissioning (Conventional Outdoor Unit) Both unit capacity and number of compressor stages are required to be configured through the iComfort series thermostat. Once the outdoor unit has been installed and connected to the equipment interface module, go to the thermostat and start the configuration process. 1. From the system devices screen, touch the yes button to add or remove non-communicating equipment. 2. A non-communicating device list will appear, select Outdoor Unit Type and then touch edit. Figure 6. Adding Conventional Outdoor Unit 3. Under Outdoor Unit Type, select the applicable 1 or 2-stage unit. 2. A add/remove equipment screen will appear. Under Outdoor Unit Touch save to continue. Type, select the applicable 1 or 2-stage unit. 4. Under non-communicating device list, select Outdoor Unit Capacity 3. Touch either the plus or minus buttons to selected the applicable and then touch edit. Outdoor Unit Capacity. Valid options are 18, 24, 30, 36, 42, 48 and 5. Touch either the up or down arrows to selected the applicable Outdoor 60. Unit Capacity. Valid options are 18, 24, 30, 36, 42, 48 and 60. Touch 4. Touch save to continue. save to continue. This completes the configuring of the conventional outdoor unit. Operating Environment Specifications iComfort S30 Commissioning (Conventional Outdoor Unit) The Equipment Interface Module is designed to operate in the following environmental conditions. Both unit capacity and number of compressor stages are required to be • Operating Temperature Range: 40°F to 176°F (40° C to 80°C). configured through the iComfort series thermostat. Once the outdoor unit has been installed and connected to the equipment interface module, go to • Shipping and Storage Temperature Range: 40° F to 185°F (40°C to the thermostat and start the configuration process. 85°C). • Operating Humidity Range: 10% to 90% non-condensing at 104°F. 1. From the equipment found screen, touch the non-communication equipment location to add non-communicating equipment.

9 Unit Dimensions DUAL−FUEL WITH DEFROST TEMPERING (EIM, 24VAC Furnace and Communicating Heat Pump)

ICOMFORT WI-FI

ICOMFORT S30

6” (152mm)

iComfort Series Equipment Interface Thermostat Model (EIM) Furnace

NOTE: iComfort Wi-Fi Thermostat with firmware version 2.1 or higher) iComfort -enabled Heat Pump (Outdoor Unit) 8” (203mm)

Wiring Legend Outdoor Sensor 1-5/8” (42mm) 4-wire communicating (Included with 24VAC conventional Heat Pump)

Figure 7. Unit Dimensions

Duel-Fuel Operations Defrost Tempering (Available only if To use the EIM in dual-fuel mode, the following equipment combinations furnace is variable capacity and configuration is required. or multi-stage) Defrost Air Tempering Kit (67M41) will be required. The included DT1 Optional discharge temperature probe is inserted in the furnace air outlet between the furnace and the indoor coil to keep the furnace from overheating the coil which would cause heat pump high pressure tripping during the defrost Figure 8. EIM, Conventional Furnace and iComfort Heat Pump cycling. The DT1 is only needed with non-communicating furnaces and is not required for air handlers. Wiring example for the DT1 Discharge Temperature Probe is in “Figure 14. Dual-Fuel - Conventional Furnace with Conventional Heat Pump” on page 12.

10 Table 10. Wiring Diagrams DUAL−FUEL WITH DEFROST TEMPERING Indoor Outdoor (EIM, Communicating Furnace and 24VAC Heat Pump System Unit Unit Diagram

ICOMFORT Hot Water Coil with WI-FI Aquastat Blower Conventional iComfort Figure 17 on page 14 Control

ICOMFORT S30 Accessories - De- humidifiers, humidifiers, HEPA Bypass Conventional Not applicable Figure 18 on page 15 Filter (HRV / ERV) Accessories - EDA iComfort Series Humiditrol and iComfort -enabled Equipment Interface Thermostat Conventional Conventional Figure 19 on page 16 Furnace Model (EIM) LVCS Ventilation Control

NOTE: iComfort Wi-Fi * 24VAC conventional air handler or CBX32MV(-6) / CBX40UHV used as 24VAC conven- Thermostat with firmware tional. version 2.1 or higher) 24VAC Wiring Legend 4-wire communicating Conventional Heat Pump 24VAC conventional ICOMFORT SERIES (Outdoor Unit) THERMOSTAT

X2658 Outdoor Sensor Required

Figure 9. EIM, Conventional Furnace and Conventional Heat Pump

Field Wiring

Table 10. Wiring Diagrams REMOVE JUMPER BETWEEN R AND W2 System Indoor Outdoor Diagram IF PRESENT. IT MAY CAUSE Unit Unit ERRONEOUS ALERT CODE 125. Air Conditioner Conventional Conventional Figure 10 Heat Pump Conventional Conventional Figure 11 on page 12 Dual Fuel Conventional iComfort Figure 12 on page 12 Dual Fuel iComfort Conventional Figure 13 on page 12 Dual Fuel Conventional Conventional Figure 14 on page 12 Dual Fuel with iComfort Conventional Figure 15 on page 13 iHarmony Figure 10. Conventional Furnace or Air Hander with Conventional Air Conditioner Baseboard Heat Conventional* iComfort Figure 16 on page 14

11 ICOMFORT SERIES ICOMFORT SERIES THERMOSTAT THERMOSTAT