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EIM with Air Hander or Furnace (Indoor Unit)
and either a Air Conditioner or Heat Pump
(Outdoor Unit)
NOTE: For dual-fuel applications, additional components may be need to be added.
Lennox Communicating
Equipment Interface
Thermostat
Model (EIM)
Wiring Legend
4−wire communicating
24VAC conventional
Figure 2. System View
WARNING
Controls in this module are sensitive to moisture. Do NOT secure this
module to the sheet metal cabinet where moisture may condense during
periods of high humidity. Secure the module to a nearby wooden stud, if
possible.
Installation
IMPORTANT
The Lennox communicating thermostat paired with the Equipment
Interface Module (EIM) will work with most 24VAC furnaces, air handlers,
air conditioners and heat pumps (up to 2-stages of cooling and 3-stages
of heat).
The Lennox communicating thermostat without the Equipment Interface
Module (EIM) will work with Lennox communicating HVAC equipment.
1. Remove the module cover.
2. Mount the Equipment Interface Module (EIM) near the indoor unit.
24VAC Air Handler or
Furnace (Indoor Unit)
-enabled
24VAC Air
iComfort
®
Air Conditioner or
Conditioner
Heat Pump
or Heat Pump
(Outdoor Unit)
(Outdoor Unit)
3. Use the wiring diagrams reference in the sectoin titled "Field Wiring"
on page 10 to complete the wiring connections for the specific
application and configuration.
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.
NOTE: When
the
Equipment
recommissioning the Lennox communicating thermostat will also
need to be re-accomplished. See the Lennox communicating
thermostat Setup Guide for recommissioning procedure.
The following examples are two typical configurations used with the EIM.
There are other applications as well and are address in the wiring diagrams
section titled "Field Wiring" on page 10. Those diagrams will indicate all
required jumper settings on the EIM and wiring connections.
EIM, 24VAC Furnace and Lennox Communicating Heat Pumps
See "Figure 12. Dual-Fuel - Conventional Furnace with Lennox
Communicating
Heat Pump (1 or 2-Stage)" on page 11 for wiring details.
1. Set the EIM Unit Type Jumper to IFC.
2. Set the EIM Heat Stage Jumper (see "Table 3. Heat Stage Jumpers"
on page 5) to the applicable number of furnace heat stages or
number of electric heat stages.
3. Use the Lennox communicating thermostat to complete the
commissioning procedure.
EIM, Lennox Communicating Furnace and 24VAC Heat Pump
See "Figure 11. Dual-Fuel - Lennox Communicating Furnace with
Conventional Heat Pump (1 or 2-Stage)" on page 11f or wiring details.
1. Set the EIM Unit Type Jumper to Heat Pump.
2. Set the EIM Heat Stage Jumper (see "Table 3. Heat Stage Jumpers"
on page 5) to the applicable number of heat pump heating stages.
3. Use the Lennox communicating thermostat to complete the
commissioning procedure.
4
Interface
Module
is
replaced,
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