Condenser Fan Control - Daikin AGZ030E Installation, Operation And Maintenance Manual

Cycle Timers
A minimum time between starts of the compressor and a
minimum time between shutdown and start of the compressor
shall be enforced. The time values are determined by the
Start-start Timer and Stop-start Timer setpoints.
These cycle timers should not be enforced through cycling of
power to the chiller. This means that if power is cycled, the
cycle timers should not be active.
These timers may be cleared via a setting on the controller.

Condenser Fan Control

Condenser fan control should stage fans as needed any time
compressors are running on the circuit. All fans and solenoid
valves will be off when the circuit is in the off and preopen
states. Condenser fan digital outputs will be turned on or
off immediately for condenser stage changes. Condenser
solenoid valve outputs will turn on immediately when a stage
up requires the output to turn on, but will have a delay for
turning off during a stage down. This delay is 20 seconds. If
the circuit shuts off then the condenser solenoid valve outputs
will turn off without a delay.
Condenser Staging
Condenser staging will use up to 5 digital outputs for control of
condenser fans and a digital output for control of a condenser
solenoid valve. When equipped with condenser fan VFDs, the
speed signal(s) also starts and stops the fan that is connected
to the VFD. The total number of fans on shall be adjusted
with changes of one fan at a time. The tables below show the
outputs energized for each stage.
Figure 54: 2 Fans per Circuit - Unit Numbering Schematic
2-Fan Unit Locations and Numbering
Fan 11
Fan 21
IOM 1206-7 • TRAILBLAZER
Fan 12
Fan 22
MODEL AGZ CHILLERS
™
Table 61: 2 Fans per Circuit - Without Fan VFD
Circuit 1
Description Output
Fan Output 1 UC DO3
Fan Output 2 UC DO4
Circuit 2
Description Output
Fan Output 1 UC DO7
Fan Output 2 UC DO8
Table 62: 2 Fans per Circuit - With 1 Fan VFD per Circuit
Circuit 1
Description Output
Speed Signal 1 UC X5
Fan Output 2 UC DO4
Circuit 2
Description Output
Speed Signal 1 UC X6
Fan Output 2 UC DO8
Figure 55: 3 Fans per Circuit - Unit Numbering Schematic
3-Fan Unit Locations and Numbering
Fan 11
Fan 12
Table 63: 3 Fans per Circuit - Without Fan VFD
Circuit 1
Description Output
Fan Output 1 UC DO3
Fan Output 2 UC DO4
Fan Output 3 UC DO5
Condenser SV UC X7
Circuit 2
Description Output
Fan Output 1 UC DO7
Fan Output 2 UC DO8
Fan Output 3 UC DO9
Condenser SV UC X8
72
C f
IrCUIT UnCTIons
Stage
Fans
1 2 3 4 5
Fan 11 On On -- -- --
Fan 12 On -- -- --
Stage
Fans
1 2 3 4 5
Fan 21 On On -- -- --
Fan 22 On -- -- --
Stage
Fans
1 2 3 4 5
Fan 11 On On -- -- --
Fan 12 On -- -- --
Stage
Fans
1 2 3 4 5
Fan 21 On On -- -- --
Fan 22 On -- -- --
Fan 13 Fan 22
Fan 23 Fan 21
Stage
Fans
1 2 3 4
Fan 11 On On On --
Fan 12 On On --
Fan 13 On
SV 11 On
Stage
Fans
1 2 3 4
Fan 21 On On On --
Fan 22 On On --
Fan 23 On --
SV 21 On --
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5 6
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