Daikin EWYD-BZ - Page 18

D-EOMCP00104-14_01EN
Operating Manual
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EWYD_BZ
Table 3 - Compressors unloading and shutdown management (3 compressors unit)
Step n.
Leader Comp.
Lag 1 Comp.
Lag 2 Comp.
0
100%
100%
100%
1
Fixed at 100%
Fixed at 100%
Fixed at 100%
2
Fixed at 100%
Fixed at 100%
Unload up to 75%
3
Fixed at 100%
Unload up to 75%
Fixed at 75%
4
Unload up t75%
Fixed at 75%
Fixed at 75%
5
Fixed at 75%
Fixed at 75%
Fixed at 75%
6
Fixed at 75%
Fixed at 75%
Unload up to 50%
7
Fixed at 75%
Fixed at 75%
Fixed at 50%
8
If T is approaching SetP
… Waiting …
9a
SetP-RDT<T< SetP-RDT
Fixed at 75%
Fixed at 75%
Load up to 75%
9b
SetP-RDT<T or T> SetP-RDT
Fixed at 75%
Fixed at 75%
Fixed at
10
(if lag2 at 75%)
Fixed at 75%
Fixed at 75%
Fixed at
11
Fixed at 75%
Unload up to 50%
Fixed at 50%
12
Fixed at 75%
Fixed at 50%
Fixed at 25%
13
If T is approaching SetP
… Waiting …
14a
SetP-RDT<T< SetP-RDT
Fixed at 75%
Load up to 75%
Stop
14b
SetP-RDT<T or T> SetP-RDT
Fixed at 75%
Fixed at 50%
Stop
15
(if lag1 at 75%)
Fixed at 75%
Unload up to 50%
Off
16
Unload up to 50%
Fixed at 50%
Off
17
Fixed at 50%
Unload up to 25%
Off
18
If T is approaching SetP
… Waiting …
19a
SetP-RDT<T< SetP-RDT
Load up to 75%
Stop
Off
19b
SetP-RDT<T or T> SetP-RDT
Fixed at 50%
Stop
Off
20
Unload up to 25%
Off
Off
21
If T is approaching SetP
… Waiting …
22
If (SetP - T) < Shutdown DT & Cooling
OR
If (T – SetP)< Shutdown DT & Heating THEN….Wait….
23
Stop
Off
Off
24
Off
Off
Off