IOM 1206-7 • TRAILBLAZER
™
MODEL AGZ CHILLERS
54 www.DaikinApplied.com
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Figure 47: Unit Sequence of Operation - Cool Mode
Is unit enabled?
Is flow present?
Evaporator pump output on
Yes
Yes
No
Wait for chilled water loop to
recirculate
Unit power up
No
Unit in Off state
The chiller may be disabled via the unit switch, the remote switch, the keypad
enable setting, or the BAS network. In addition, the chiller will be disabled if all
circuits are disabled, or if there is a unit alarm. If the chiller is disabled, the unit
status display will reflect this and also show why it is disabled.
If the chiller is enabled, then the unit will be in the Auto state and the evaporator
water pump output will be activated.
If the unit switch is off, the unit status will be
Off:Unit Switch
. If the chiller is
disabled due to network command, the unit status will be
Off:BAS Disable
. When
the remote switch is open, the unit status will be
Off:Remote Switch
. When a unit
alarm is active, the unit status will be
Off:Unit Alarm
. In cases where no circuits
are enabled, the unit status will be
Off:All Cir Disabled
. If the unit is disabled via
the Chiller Enable set point, the unit status will be
Off:Keypad Disable
.
Yes
No
Is low ambient lockout
active?
After establishing flow, the chiller will wait some time to allow the chilled water
loop to recirculate for an accurate reading of the leaving water temperature.
The unit status during this time is
Auto:Evap Recirculate
.
The chiller will then wait for the flow switch to close, during which time the unit
status will be
Auto:Wait for flow
.
Low ambient lockout will prevent the chiller from starting even if it is otherwise
enabled. When this lockout is disabling the chiller, the unit status will be
Off:Low
OAT Lock
.
Pump output remains on
while chiller is enabled
No
If the chiller is waiting on the motor protection delay after powering up, the unit
status will be
Off: Motor Protection Delay.
Is Motor Protection
delay active?
Yes
Summary of Contents for AGZ030E
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