
Installation
and
Operation
Manual
10
Figure
5
AMI
(Back)
PTU
The
PTU
contains
an
internaltransformer,
which
converts
110
‐
120VAC,
or
220
‐
240VAC
input
to
24VAC
output
to
PCU.
Figure
6
PTU
110
‐
120VAC
or
220
‐
240VAC
input
is
optional.
A
slide
switch
is
used
to
fulfill
this
function.
Please
refer
to
Power
Supply
Wiringsection
for
switch
usage
information.
110-120 VAC, 60Hz,3.86A
Or 220-240 VAC 50Hz, 1.96A
24VAC