Daikin AWV024 - Operation Following Cycling of Power; Unit Level Changes; Circuit Level Changes

unIT funCTIons
www.DaikinApplied.com 57 IOM 1242-2 • PATHFINDER
®
MODEL AWV CHILLERS
RapidRestore
®
The option allows the capability to restart more quickly and to
load faster than normal when power is lost and restored.
Enabling
Changing the RapidRestore
®
set point to Enable will require
the following to be true:
• RapidRestore
®
module is present at address 22
• DI1 on the RapidRestore
®
module has a signal
If any of the above are no longer true, the RapidRestore
®
set
point will be changed to Disable.
Operation Following Cycling of Power
The chiller will enter RapidResore
®
upon powering up when
the following conditions are met:
• RapidRestore
®
is enabled
• Power failure lasts less than the value of the Max Power
Failure Time set point
• Power failure lasts at least one second
• Unit is enabled
• LWT Error is at least equal to the Stage Up Delta T set
point
RapidRestore
®
will end if any of the following conditions occur:
• LWT Error is less than the Stage Up Delta T set point
• Unit capacity = 100%
• All circuits become disabled for any reason
• Unit becomes disabled for any reason
• 10 minutes have passed since unit powered up
Unit Level Changes
During RapidRestore
®
operation, unit capacity control logic
allows both circuits to start simultaneously.
In the event that both circuits do not start simultaneously, the
requirement for the running circuit to reach maximum capacity
will be ignored for staging the other circuit on.
Circuit Level Changes
When RapidRestore
®
is triggered, all compressor cycle timers
are cleared to allow for starting more quickly. The limit of four
starts per hour will remain in effect and will not be cleared by
triggering RapidRestore
®
.