Daikin EWAP460MBYN [213/452] A 2 a 2

Daikin EWAP400MBYN [213/452] A 2 a 2
ESIE05-07 Functional Control for a Standalone Unit
Part 2 – Functional Description 2–17
3
2
4
5
1
Stepless:
differentail
thermostat
The operation in this mode is described in the following picture.
This mode is only possible on stepless units, for inlet and outlet evaporator and condenser control.
A loadup/down request of 10 sec is approx. 7% compressor capacity.
A loadup/down request of 5 sec is approx. 3.5 % compressor capacity.
Sampling time of 12 sec (default outlet control) or 48 sec (default inlet control): each 12 or 48 sec a
loadup/down is possible (TimLoadup = 0), depending on the request (loadup/down).
Remarks When starting the unit and there is demand for load but the unit does not start, keep in mind the
following:
P Timers are still busy.
P Control motor feedback (compressor capacity) is not on minimum value, and controller is still busy
downloading.
P Control motor feedback value is on minimum (12% compressor capacity) but the controller is still
busy checking the feedback value. After 5 loaddows with no change in feedback, the unit can
startup.
The control motor feedback value and the indication if the controller is uploading or downloading can
be found in the I/O menu.
Default and limit
values
CBC C B
A/2A/2
C
Loadup10sReq
Loadup5sReq
Loaddown5sReq
Loaddown10sReq
Loadup5sReq
Loadup10sReq
Loaddown10sReq
Loaddown5sReq
Loadup/dwn
(for inl/outl evap)
For inlet condenser
thermostat it is
reversed !
Setpoint (°C) Water temp (°C)
Stepless control Default value Lower limit Upper limit
A (K) 0.8 0.8 6.0
B (K) 0.5 0.5 1.0
C (K) 0.2 0.2 0.4
Setpoint (°C) 12.0 9.0 23.0
Load-up time (sec) 12 12 300
Load-down time (sec) 12 12 300
ESIE05-07.book Page 17 Wednesday, October 11, 2006 10:42 AM

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