Lighting Controls Blue Box LT Series Installation, Operation & Maintenance Manual page 85

THE BLUE BOX LT PROGRAMMING
group do?
: A It makes it so that when you turn ON the group,
the relays don't come on – only the group
status changes to ON and the relay timers are
disabled .
: Q Why would someone want to use "NO
AUTOMATIC ON"?
: A So they can take disable relay-timers without
actually turning the relays on . For example, if
the customer wants to turn lights on with a
switch early in the morning, and not have them
automatically shut off after an hour (timer
mode), they would need to turn the MAINTAIN
+ TIMER group on with a schedule . However, if
they don't want the actual lights to turn on until
they use a switch, they would set the group to
"No Auto On" . This would take the relays out
of Timer mode, but not turn them on with the
schedule . This saves energy until someone enters
the room and switches the lights on .
: Q When must a switch button be programmed
to operate a group instead of just operating the
relays directly?
: A When you want the switch to operate more
than 8 relays, the system will require you to make
them into a group .
: Q How do you toggle a group on and off using a
single switch button?
: A You can't . Groups cannot be toggled . If you
want to turn more than 8 relays on and off
with a switch, you need to use two buttons and
two groups: one MOMENTARY On and one
MOMENTARY OFF .
: Q What kind of group would you normally NOT
assign to a momentary switch?
: A You normally do NOT assign any of the maintain-
type groups (MAINTAIN, MAINTAIN+TIMER,
MAINTAIN+BLINK) to a switch . The reason for
this is that switch buttons turn maintain groups
ON when the button is held down and OFF
when the button is released .
Having to hold the button down to keep lights
on is not generally useful!
: Q If you are having a photocell control more than
8 relays, what type of group would you assign to
the photocell?
: A You would normally use a maintain-type group .
Remember that only maintain-type groups can
be turned on AND off . If you want the photocell
to turn lights ON when it is dark and OFF when
it is bright, the easiest way is to use a maintain
group .
: Q When would you use a momentary-type group
with a photocell?
: A When you only want the photocell to turn the
relays OFF, or only want it to turn relays ON .
Even when using a schedule to turn the lights
off (for example at 11:00pm), one would usually
program the Photocell as "Maintain" . This ensures
the lights turn off at dawn in the event that an
override "ON" command switched the lights on
during the night .
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