Daikin AWV024 - Fan Outputs Per Fan Stage; Staging Concept; Staging up; Digital Outputs Energized for each Stage

CIrCuIT funCTIons
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MODEL AWV CHILLERS
Fan Outputs Per Fan Stage
The table below shows which digital outputs are energized for each stage.
Table 52: Digital Outputs Energized for Each Stage
# Fans On
Circuit
4 6 8 10 12 14 16
Fan
Stage
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1
2 1,3 1,3 1,3 1,2 1,2 1,2 1,2
3 1,2,3 1,3,5 1,5 1,3 1,3 1,3 1,3
4 1,2,3,4 1,2,3,5 1,3,5 1,2,3 1,5 1,2,3 1,2,3
5 - 1,3,4,5 1,2,3,5 1,3,5 1,2,5 1,5 1,5
6 - 1,2,3,4,5 1,2,3,4,5 1,2,3,5 1,3,5 1,2,5 1,2,5
7 - - 1,2,3,5,6 1,3,4,5 1,2,3,5 1,3,5 1,3,5
8 - - 1,2,3,4,5,6 1,2,3,4,5 1,3,4,5 1,2,3,5 1,2,3,5
9 - - - 1,3,4,5,6 1,2,3,4,5 1,3,4,5 1,4,5
10 - - - 1,2,3,4,5,6 1,2,3,5,6 1,2,3,4,5 1,2,4,5
11 - - - - 1,3,4,5,6 1,3,5,6 1,3,4,5
12 - - - - 1,2,3,4,5,6 1,2,3,5,6 1,2,3,4,5
13 - - - - - 1,3,4,5,6 1,4,5,6
14 - - - - - 1,2,3,4,5,6 1,2,4,5,6
15 - - - - - - 1,3,4,5,6
16 - - - - - - 1,2,3,4,5,6
Staging Concept
As long as the condenser saturated temperature is within the band dened by the active stage up deadband and active stage down
deadband, the fan stage will not change. When saturated condenser temperature is outside of the deadbands, error is accumulated
and will cause a change in the fan stage.
Figure 64: Fan Staging Conditions
Staging Up
When the saturated condenser temperature is above the Target + the active deadband, a Stage Up error is accumulated.
Stage Up Error Step = saturated condenser temperature – (target + Stage Up Deadband)
The Stage Up Error Step is added to Stage Up Accumulator once every ve seconds, only if the saturated condenser temperature
is not falling. When the Stage Up Error Accumulator is greater than 11°C (19.8°F) fan stage is increased by 1. When a stage up
occurs or the saturated condenser temperature falls back within the Stage Up deadband the Stage Up Accumulator is reset to zero.
If this error accumulaon is greater than 3.0°C Fan stage down.
If this error accumulaon is greater than 11°C, Fan stage up.
(Target) + (stage up deadband)
Saturated Condenser
Temperature Target
(Target) - (stage down deadband)
Limit
Error
Error
Target
Condenser saturated temperature