Epson Z8250NL - Manual (Page 177)

Settings for Multiple Projectors
177
Procedure
A
Set the remote control ID switch to On.
B
During projection, while holding the [ID] button, press the
[Help] button.
When you press the buttons, the current Projector ID is displayed
on the projection screen. It disappears in about three seconds.
Setting the remote control ID
Procedure
A
Set the remote control ID switch to On.
B
While holding the [ID] button, press a number button to
select a number to match the ID of the projector you want to
operate. s "Checking the Projector ID"
p.176
Once this setting has been made, the projector that can be operated by
the remote control is limited.
Remote Control
Remote Control