Daikin EWYD-BZ, Operating Manual

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Operating Manual D-EOMCP00104-14_01EN
EWYD_BZ 17/35
Table 2 -
Compressors startup and loading management (4 compressors unit)
Step n. Leader Comp. Lag 1 Comp. Lag 2 Comp. Lag 3 Comp.
0 Off Off Off Off
1
If (T
– SetP) < Startup DT & Cooling
or (SetP - T) < Startup DT & Heating
… Waiting …
2 Start Off Off Off
3
Load up to 75%
Off
Off
Off
4
If T in Regulation Band
… Wait interstage time …
5
If T is approaching SetP
… Waiting …
6a
SetP-RDT<T< SetP-RDT
Unload up to 50% Start Off Off
6b
SetP-RDT<T or T> SetP-RDT
Fixed at 75% Start Off Off
7
Fixed at
75% or 50%
Load up to 50% Off Off
8
(if leader at 50%)
Load up to 75% Fixed at 50% Off Off
9 Fixed at 75% Load up to 75% Off Off
10
If T in Regulation Band
… Wait interstage time …
11
If T is approaching SetP
… Waiting …
12a
SetP-RDT<T< SetP-RDT
Fixed at 75% Unload up to 50% Start Off
12b
SetP-RDT<T or T> SetP-RDT
Fixed at 75% Fixed at 75% Start Off
13 Fixed at 75% Fixed at 75% or 50% Load up to 50% Off
14
(if lag1 at 50%)
Fixed at 75% Load up to 75% Fixed at 50% Off
15 Fixed at 75% Fixed at 75% Load up to 75% Off
16
If T in Regulation Band
… Wait interstage time …
17
If T is approaching SetP
… Waiting …
18a
SetP-RDT<T< SetP-RDT
Fixed at 75% Fixed at 75% Unload up to 50% Start
18b
SetP-RDT<T or T> SetP-RDT
Fixed at 75% Fixed at 75% Fixed at 75% Start
17 Fixed at 75% Fixed at 75%
Fixed at 75% or
50%
Load up to 50%
18
(if lag2 at 50%)
Fixed at 75% Fixed at 75% Load up to 75% Fixed at 50%
19 Fixed at 75% Fixed at 75% Fixed at 75% Load up to 75%
20
Load up to 100%
Fixed at 75%
Fixed at 75% Fixed at 75%
21 Fixed at 100% Load up to 100% Fixed at 75% Fixed at 75%
22 Fixed at 100% Fixed at 100% Load up to 100% Fixed at 75%
23 Fixed at 100% Fixed at 100% Fixed at 100% Load up to 100%
24 Fixed at 100% Fixed at 100% Fixed at 100% Fixed at 100%