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Unit Dimensions
Figure 7. Unit Dimensions
Duel-Fuel Operations
To use the EIM in dual-fuel mode, the following equipment combinations
and configuration is required.
Defrost Air Tempering Kit (67M41) will be required. The included DT1
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
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.
8" (203mm)
1-5/8" (42mm)
DUAL−FUEL WITH DEFROST TEMPERING
(EIM, 24VAC Furnace and Communicating Heat Pump)
ICOMFORT
WI-FI
6" (152mm)
iComfort Series
Thermostat
NOTE: iComfort Wi-Fi
Thermostat with firmware
version 2.1 or higher)
Figure 8. EIM, Conventional Furnace and iComfort Heat Pump
10
ICOMFORT
S30
Equipment Interface
Model (EIM)
Wiring Legend
4-wire communicating
24VAC conventional
Furnace
iComfort
®
-enabled
Heat Pump
(Outdoor Unit)
Outdoor Sensor
(Included with
Heat Pump)
Defrost Tempering
(Available only if
furnace is variable
capacity
or multi-stage)
Optional
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