Installation and Operation Manual -
HRG18xxS1P
Issue 2117
508192M01
*P508192M01*
The low-voltage field connection harness has temporarily changed on the
HRG18
units due to availability of the wiring
harness connectors from our supplier. The low-voltage field wiring connection harness is provided with leads with stripped
ends in the low-voltage make-up box for field connections using wire nuts.
•
Connect the low-voltage field wiring to the stripped low-voltage field wiring harness leads using wire nuts.
•
The field wiring connections are color coded and stamped with the terminal designation every couple of inches along
the wire. See the
HRG18
tables on page 1 and 2.
•
Install a wire nut on any unused wire to electrically insulate the unused wire.
Field Connection Wire
Harness Wire Color
Marking Stamped on
the Wire
Thermostat Wire
Connection
Notes
Light Blue
TST
TST
Not used. Install a wire nut on this wire.
Light Blue
DF
DF
Not used. Install a wire nut on this wire.
Red
R
R
R (24VAC Power); Used with A3 Comfort Sync
®
thermostat and 24V conventional thermostats
Purple
i+
i+
Used with A3 Comfort Sync
®
thermostat only.
Install wire nut on this wire if unused.
Gray
i-
i-
Used with A3 Comfort Sync
®
thermostat only.
Install wire nut on this wire if unused.
Black
C
C
C (24VAC Common); Used with A3 Comfort
Sync
®
thermostat and 24V conventional
thermostats
Table 1. HRG18 Thermostat Wiring Low Voltage Field Connection Harness #1
Addendum
to HRG18
Installation Instructions
