Breezair IWC 10 Installation & Operation Manual page 9

7-DAY TIMER PROGRAM (continued)
Any day that has start and stop times set and the day switched ON will show brackets for the
day. Any day that has start and stop times set and the day switched OFF will show no brackets.
Any day that has start and stop times set to 00.00 will show no brackets.
These programs will be ignored if the cooler is in MANUAL or EXTERNAL mode during the
programmed times. This feature allows different settings for every day - start/stop, temperature &
humidity.
DRAIN SIGNAL DELAY PROGRAM
The cooler will periodically drain itself of water in order to ensure clean operating conditions.
When it does, it sends a signal allowing a scavenger pump or other control to begin operating
(terminal J7-4). The drain delay feature allows time for the drained water to travel from the cooler
to the scavenger pump before the scavenger pump begins to operate.
To set a delayed drain mode, enter the PROGRAM mode and press the
flashes on the clock display (Fig 26).
Press the button to confirm.The current time delay will flash as four digits on the clock.
AUTO
Adjust the time delay using the
button to lock the time delay and return the cooler to the OFF mode. Disconnect and
AUTO
reconnect the power for this change to take effect.
EXTERNAL CONTROL
Some of the functions of the Wall Control can be controlled by an external device, such as a PLC
or Building Management System. In this case
EXTERNAL mode, all temperature and timer settings will be ignored. Humidity settings will be
ignored unless the external system enables humidity control. External systems may also control
the fan speed of the cooler. The bar chart on the Wall Control will show the equivalent speed
setting.
SAFETY OFF
External systems may remotely switch the cooler OFF. If the cooler is in the Safety Off mode,
then, the symbol will be displayed (Fig 28). When the
not respond to any other control input.
REMOTE ON/OFF
This input is used to turn the cooling system ON or OFF from a remote location.
The input must be in the form of a momentary pulse (provided by the installer) for both ON and
OFF functions. Any repeated pulses received within 2 seconds of the first pulse will be ignored.
When a pulse is received during cooling system operation (whether AUTO or MANUAL) the
control will save the current state of the system and the system will enter a stand-by state and
shut down.
When the next pulse is received at Input 8, the cooling system will start up again in the same
mode in which it was last shut down.
In the event that the cooling system is re-started manually during the standby state, the next
pulse received at input 8 will shut down the system into standby mode.
LOW BATTERY WARNING
The "Battery Low"
after a very long power OFF period in which the battery voltage has fallen below a functional
level. (Fig. 29). In this event,
until the clock has been reset. It may not be necessary to change the batteries at this time.
Should the "Battery Low" message appear repeatedly after short duration power failures, then
replace the battery.
The battery: The lithium battery in the Wall Control is a long life device that powers the real-time
clock only, during prolonged power "Off" periods.
BATTERY AND IS NOT ON TRICKLE CHARGE.
have a life of about 10 years.
and buttons up to a maximum of ten minutes. Press the
EXTERNAL
message will appear on the Wall Control screen when power resumes
first reset the clock.
Programming Wall Control
will show on the display (Fig 27). In
symbol is displayed, the IWC will
Then start the plant. The plant will not re-start
IT IS NOT A POWER FAILURE BACK-UP
Under normal conditions the battery should
1
26
27
or button until
28
29
8
EXTERNAL
R