BAS-SVN029C-EN
11
Installing TR170 VFD and Components
Remove Trane TR170 drive from the box, verify the VFD model number, and complete the
following procedures.
Install the TR170 Drive
1. Attach the new drive heater, HTR16716, to the side of the new drive. If another drive is
present in the panel, the heater should be placed on the side of the drive that will not face the
other drive. The heater has adhesive pre-applied to one side. Remove the protective film from
the heater and press it against the side of the drive.
2. Hold the drive up to the back plate and mark the mounting hole locations on the backplate.
N
No
otte
e:: The Trane TR170 drive has a mounting hole pattern different than the original drive.
3. Drill a 3/16" hole at each marked location. Be careful to protect other electrical components
from metal shavings and clean all metal shavings from the enclosure when drilling is
completed.
4. Line up the TR170 on the mounting hole-pattern and fasten the drive with the fasteners
retained from the original drive to the back panel.
Wire the Power Supply and Controls to the TR170
The TR1 and TR170 have the same connection point numbers, however, a four-compressor unit
or circuit 1 of a three-compressor unit requires an additional relay. These units will require the
unit schematics to be marked up or replaced. Schematics document numbers may be found in
“Wiring Diagram Matrix,” p. 21
. Print a copy from e-Library (if accessible) or contact the local
Trane representative to obtain a copy.
1. Reconnect power supply wires to VFD connection points 91, 92, 93, 95 (L1, L2, L3, GND
respectively) and output power wires to VFD connection points 96, 97, 98, 99 (T1, T2, T3, GND
respectively).
2. Reconnect all control wires to the TR170 VFD according to the connection point numbers
noted during TR1 removal. The TR1 and TR170 have the same connection point numbers.
(See the “Typical Control Wires” table in
“Remove the Control Wiring ,” p. 9
for common
control wires and their connection point numbers.)
3. Connect the new drive blanket heater wiring to 1TB7-3,4 or 2TB7-3,4.
Installing the Drive On a Four-Compressor Unit or Circuit 1 of a Three-Compressor Unit
(RTAC)
If you are installing the drive on a four-compressor unit or circuit 1 of a three-compressor unit, an
addition relay is required.
1. Mount this relay and base on the controls backplate.
2. Label the relay 1K9 if installed in control panel 1 or 2K9 if installed in control panel 2.
3. Make the wiring modifications presented in the following table:
Table 3. Intermediate relay wiring
Control Panel 1
Wire Number
Description of New
Function
Original Connections
New Connections
151A
+24 VDC
1U28-12 to 1TB6-6
1U28-12 to 1K9-1
152A
Digital Input (RUN)
1U28-18 to 1TB6-7
1U28-18 to 1K9-2
151B
+24 VDC
1U29-12 to 1TB6-6
1U29-12 to 1K9-3
152B
Digital Input (RUN)
1U29-18 to 1TB6-7
1U29-18 to 1K9-4
151C
Control Power Hot
1U15-J2-12 to 1TB6-6
1U15-J2-12 to 1TB5-3
(Node 62)
