Robertshaw PHANTOM WIRE RS-PWIRE Installation Instructions Manual

© 2017 Robertshaw Climate 844-362-4822 Page 1 250037-01

PHANTOM WIRE™

RS-PWIRE

Installation Instructions

DESCRIPTION

The RS-PWIRE Phantom Wire™ device allows the installer to connect any thermostat when a ‘common’ wire is not
available in the existing thermostat cable. This handy device ‘creates’ a phantom wire. In many existing installations,
older thermostat cables don’t have a common (24VAC common) wire because they were not needed for the
mechanical thermostats originally installed. Years ago, it was typical for the cable to only have four (4) conductors.
The RS-PWIRE creates the ‘common’ wire so the HVAC unit can be used along with any thermostat requiring a 24VAC
common. Additionally, the RS-PWIRE includes screwless terminals, color-coded wiring for the HVAC unit connection,
and LEDs on the unit to show power, heat, cool and fan calls are being created from the thermostat, practically
eliminating troubleshooting.

DRAWING

© 2017 Robertshaw Climate 844-362-4822 Page 2 250037-01

INSTALLATION & WIRING

AT HVAC EQUIPMENT LOCATION

1) Turn off power for HVAC unit

2) Remove cover to HVAC control board

3) Remove existing thermostat cable, but leave 2-wire compressor leads in place (will be
connected to Y and C)

AT THERMOSTAT LOCATION

4) Remove existing thermostat

5) Install thermostat base

6) Install Diode Assembly to Y and G terminals

a. White to W terminal
b. Yellow to Blue diode assembly with wire nut
c. Red to R terminal
d. Green to 24(c) terminal

7) Install thermostat on backplate

AT HVAC EQUIPMENT LOCATION

8) Mount RS-PWIRE device in a location inside
the equipment board area. Make sure it is
not in the way of any moving parts. Device
must be mounted close enough to the
thermostat wiring board for connection.

9) Install thermostat cable to the RS-PWIRE screwless terminals

a. Green wire to G terminal
b. Red wire to R terminal
c. White wire to W terminal
d. Yellow wire to Y terminal