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5. 1.
Wiring method
Thermostat
Thermostat
Controller
The connection example of thermostat convertor and thermostat controller is
shown below.
The connection method is different depending on the type of thermostat con-
troller. Connect them according to the following Cases.
For remote controller cable, 2 kinds of type, which are 2-wire type and 3-wire
type are available depending on the device to be connected.
(1) All wiring shown should be performed with 18 AWG thermostat wire.
(2) Terminals to thermostat controller on this product support 20-30VAC.
(3) High/medium/low fan signals are optional, and may not be available on
all thermostat models.
(4) W2 and Y2 signals are optional, and may be omitted for single-stage
thermostats. In addition, if Y2 and W2 are used, turn ON the DIP switches
SET3-1.
Case 1: Two-stage Cooling and Heating
(Example:Remote controller for 3-wire type)
Thermostat
controller
24 VAC
24 VAC
Transformer*
(Locally purchased)
208/230 VAC
* Install the transformer, as necessary, per building code and manufacturer's
installation instructions. Maximum Power: 5.0VA
En-3
Indoor unit
(VRF/single/multi)
Max. 16 units
Remote controller cable
This product
cable
Thermostat convertor
Case 2: Single-stage Cooling and Heating
(Example:Remote controller for 2-wire type)
controller
Thermostat
24 VAC
24 VAC
Transformer*
208/230 VAC
Case 3: Single-stage Cooling and Heating with Dedicated Fan
Speed Relays (Example:Remote controller for 2-wire
type)
Indoor unit
controller
Thermostat
Max.
16 units
24 VAC
24 VAC
Transformer*
208/230 VAC
Thermostat convertor
(Locally purchased)
Fan
Thermostat convertor
(Locally purchased)
Indoor unit
Max.
16 units
Indoor unit
Max.
16 units
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