Install Manual

Installation
14 Automatic Transfer Switch Owner’s Manual
Connecting the Current Transformer
(CTs)
Connect the CTs as shown in Table 3-1 below. Clamp
CT1 and CT2 around the wires connected to T1 and T2,
respectively.
Use a CAT-5 cable to connect the “Inverter CTs” port on
the controller to the “CTs” port on the Inverter. Use CAT-5
with 600V insulation, and route away from the Utility and
Inverter supply conductors. See Figure 3-4, Figure 3-5,
and Figure 3-6.
Connecting PWRcell ATS Controller
See Figure 3-4. The PWRcell ATS controller can control
an air conditioner (24 VAC) directly.
Control of Air Conditioner Load
1. Route the thermostat cable (from the furnace/
thermostat to the outdoor air conditioner unit) to the
transfer switch.
2. Connect the wire to the terminal strip terminals
(A/C 1) on the PWRcell ATS Controller as shown in
Figure 3-4. These are normally closed contacts
which open upon load shed conditions. Route
thermostat wire away from high voltage wires.
3. If required, connect additional air conditioners to
the terminal strip terminals (A/C 2-4).
NOTE: These instructions are for a typical air conditioner
installation. Control of certain heat pumps and 2-stage air
conditioners may require special connections or the use
of SMMs to control the loads.
Connecting the Grid Sense Wires
NOTE: This step is only required for the X7602. Skip if
using the XVT076A03.
Connect two 14 - 18AWG 600V wires between the “Grid
Status” port on the controller, and the Gen Sense port on
the Inverter. Route away from the Utility and Inverter
supply conductors. See Figure 3-4 and Figure 3-5.
Manual Override Button
See Figure 3-7. A manual override button (A) is provided
for diagnostics purposes. It should only be operated by
qualified personnel when the panel is de-energized.
Figure 3-7. Manual Override Button
During normal operation, the manual override button
should be disengaged, with the red LED off. When
engaged, the inverter will not be able to control the ATS.
Configuring the Inverter
Using the graphical interface on the Inverter, configure
your inverter as shown below to enable control of the
PWRCell ATS Controller.
Table 3-1. CTs Connections
CT Controller PORT WIRE COLOR
1 CT1+ Yellow
1 CT1- Green
2 CT2+ Yellow
2 CT2- Green
Contact Ratings
A/C 1-4 24 VAC, 1.0 Amp Max
Setpoint Description
Default
Value
Units
EnaEXT
Transfer
Enable use of external ATS. Set
“on” to enable ATS control.
off –
Grid
GoodTime
Minimum length of time that the
grid must be stable before the
inverter will toggle the ATS back
to grid mode after an outage.
15 s
ExtTrans
Volt
Minimum single-line (phase) grid
voltage below which the inverter
will toggle the ATS. If either line of
the grid drops below this setpoint
value and there is a grid fault, as
defined by UL1741SA trip
settings, then the inverter will
toggle the ATS to backup mode.
95.0 V
(000213)
DANGER
Electrocution. Only authorized personnel should
access transfer switch interior. Transfer switch
doors should be kept closed and locked. Failure to
do so will result in death or serious injury.
011166
A